Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 The Hafnium Authors. |
| 3 | * |
Andrew Walbran | e959ec1 | 2020-06-17 15:01:09 +0100 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style |
| 5 | * license that can be found in the LICENSE file or at |
| 6 | * https://opensource.org/licenses/BSD-3-Clause. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 7 | */ |
| 8 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 9 | #include "hf/ffa_memory.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 10 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 11 | #include "hf/arch/memcpy_trapped.h" |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 12 | #include "hf/arch/mm.h" |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 13 | #include "hf/arch/other_world.h" |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 14 | #include "hf/arch/plat/ffa.h" |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 15 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 16 | #include "hf/addr.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 17 | #include "hf/api.h" |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 18 | #include "hf/assert.h" |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 19 | #include "hf/check.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 20 | #include "hf/dlog.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 21 | #include "hf/ffa.h" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 22 | #include "hf/ffa_internal.h" |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 23 | #include "hf/ffa_memory_internal.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 24 | #include "hf/ffa_partition_manifest.h" |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 25 | #include "hf/mm.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 26 | #include "hf/mpool.h" |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 27 | #include "hf/panic.h" |
| 28 | #include "hf/plat/memory_protect.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 29 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 30 | #include "hf/vm.h" |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 31 | #include "hf/vm_ids.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 32 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 33 | #include "vmapi/hf/ffa_v1_0.h" |
| 34 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 35 | #define RECEIVERS_COUNT_IN_RETRIEVE_RESP 1 |
| 36 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 37 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 38 | * All access to members of a `struct ffa_memory_share_state` must be guarded |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 39 | * by this lock. |
| 40 | */ |
| 41 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 42 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 43 | |
| 44 | /** |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 45 | * Return the offset to the first constituent within the |
| 46 | * `ffa_composite_memory_region` for the given receiver from an |
| 47 | * `ffa_memory_region`. The caller must check that the receiver_index is within |
| 48 | * bounds, and that it has a composite memory region offset. |
| 49 | */ |
| 50 | static uint32_t ffa_composite_constituent_offset( |
| 51 | struct ffa_memory_region *memory_region, uint32_t receiver_index) |
| 52 | { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 53 | struct ffa_memory_access *receiver; |
| 54 | uint32_t composite_offset; |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 55 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 56 | CHECK(receiver_index < memory_region->receiver_count); |
| 57 | |
| 58 | receiver = |
| 59 | ffa_memory_region_get_receiver(memory_region, receiver_index); |
| 60 | CHECK(receiver != NULL); |
| 61 | |
| 62 | composite_offset = receiver->composite_memory_region_offset; |
| 63 | |
| 64 | CHECK(composite_offset != 0); |
| 65 | |
| 66 | return composite_offset + sizeof(struct ffa_composite_memory_region); |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 70 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 71 | */ |
| 72 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 73 | { |
| 74 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 75 | } |
| 76 | |
| 77 | /** |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 78 | * Initialises the next available `struct ffa_memory_share_state`. If `handle` |
| 79 | * is `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, |
| 80 | * otherwise uses the provided handle which is assumed to be globally unique. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 81 | * |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 82 | * Returns a pointer to the allocated `ffa_memory_share_state` on success or |
| 83 | * `NULL` if none are available. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 84 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 85 | struct ffa_memory_share_state *allocate_share_state( |
| 86 | struct share_states_locked share_states, uint32_t share_func, |
| 87 | struct ffa_memory_region *memory_region, uint32_t fragment_length, |
| 88 | ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 89 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 90 | assert(share_states.share_states != NULL); |
| 91 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 92 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 93 | for (uint64_t i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 94 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 95 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 96 | &share_states.share_states[i]; |
| 97 | struct ffa_composite_memory_region *composite = |
| 98 | ffa_memory_region_get_composite(memory_region, |
| 99 | 0); |
| 100 | |
| 101 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 102 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 103 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 104 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 105 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 106 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 107 | allocated_state->share_func = share_func; |
| 108 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 109 | allocated_state->fragment_count = 1; |
| 110 | allocated_state->fragments[0] = composite->constituents; |
| 111 | allocated_state->fragment_constituent_counts[0] = |
| 112 | (fragment_length - |
| 113 | ffa_composite_constituent_offset(memory_region, |
| 114 | 0)) / |
| 115 | sizeof(struct ffa_memory_region_constituent); |
| 116 | allocated_state->sending_complete = false; |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 117 | for (uint32_t j = 0; j < MAX_MEM_SHARE_RECIPIENTS; |
| 118 | ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 119 | allocated_state->retrieved_fragment_count[j] = |
| 120 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 121 | } |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 122 | return allocated_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 123 | } |
| 124 | } |
| 125 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 126 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /** Locks the share states lock. */ |
| 130 | struct share_states_locked share_states_lock(void) |
| 131 | { |
| 132 | sl_lock(&share_states_lock_instance); |
| 133 | |
| 134 | return (struct share_states_locked){.share_states = share_states}; |
| 135 | } |
| 136 | |
| 137 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 138 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 139 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 140 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 141 | share_states->share_states = NULL; |
| 142 | sl_unlock(&share_states_lock_instance); |
| 143 | } |
| 144 | |
| 145 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 146 | * If the given handle is a valid handle for an allocated share state then |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 147 | * returns a pointer to the share state. Otherwise returns NULL. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 148 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 149 | struct ffa_memory_share_state *get_share_state( |
| 150 | struct share_states_locked share_states, ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 151 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 152 | struct ffa_memory_share_state *share_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 153 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 154 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 155 | |
| 156 | /* |
| 157 | * First look for a share_state allocated by us, in which case the |
| 158 | * handle is based on the index. |
| 159 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 160 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 161 | uint64_t index = ffa_memory_handle_get_index(handle); |
| 162 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 163 | if (index < MAX_MEM_SHARES) { |
| 164 | share_state = &share_states.share_states[index]; |
| 165 | if (share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 166 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 167 | } |
| 168 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 169 | } |
| 170 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 171 | /* Fall back to a linear scan. */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 172 | for (uint64_t index = 0; index < MAX_MEM_SHARES; ++index) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 173 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 174 | if (share_state->memory_region != NULL && |
| 175 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 176 | share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 177 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 178 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 179 | } |
| 180 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 181 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 185 | void share_state_free(struct share_states_locked share_states, |
| 186 | struct ffa_memory_share_state *share_state, |
| 187 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 188 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 189 | uint32_t i; |
| 190 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 191 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 192 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 193 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 194 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 195 | /* |
| 196 | * First fragment is part of the same page as the `memory_region`, so it |
| 197 | * doesn't need to be freed separately. |
| 198 | */ |
| 199 | share_state->fragments[0] = NULL; |
| 200 | share_state->fragment_constituent_counts[0] = 0; |
| 201 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 202 | mpool_free(page_pool, share_state->fragments[i]); |
| 203 | share_state->fragments[i] = NULL; |
| 204 | share_state->fragment_constituent_counts[i] = 0; |
| 205 | } |
| 206 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 207 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 208 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 209 | } |
| 210 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 211 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 212 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 213 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 214 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 215 | struct ffa_composite_memory_region *composite; |
| 216 | uint32_t expected_constituent_count; |
| 217 | uint32_t fragment_constituent_count_total = 0; |
| 218 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 219 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 220 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 221 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 222 | |
| 223 | /* |
| 224 | * Share state must already be valid, or it's not possible to get hold |
| 225 | * of it. |
| 226 | */ |
| 227 | CHECK(share_state->memory_region != NULL && |
| 228 | share_state->share_func != 0); |
| 229 | |
| 230 | composite = |
| 231 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 232 | expected_constituent_count = composite->constituent_count; |
| 233 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 234 | fragment_constituent_count_total += |
| 235 | share_state->fragment_constituent_counts[i]; |
| 236 | } |
| 237 | dlog_verbose( |
| 238 | "Checking completion: constituent count %d/%d from %d " |
| 239 | "fragments.\n", |
| 240 | fragment_constituent_count_total, expected_constituent_count, |
| 241 | share_state->fragment_count); |
| 242 | |
| 243 | return fragment_constituent_count_total == expected_constituent_count; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Calculates the offset of the next fragment expected for the given share |
| 248 | * state. |
| 249 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 250 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 251 | struct share_states_locked share_states, |
| 252 | struct ffa_memory_share_state *share_state) |
| 253 | { |
| 254 | uint32_t next_fragment_offset; |
| 255 | uint32_t i; |
| 256 | |
| 257 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 258 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 259 | |
| 260 | next_fragment_offset = |
| 261 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 262 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 263 | next_fragment_offset += |
| 264 | share_state->fragment_constituent_counts[i] * |
| 265 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 268 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 271 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 272 | { |
| 273 | uint32_t i; |
| 274 | |
| 275 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 276 | return; |
| 277 | } |
| 278 | |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 279 | dlog("from VM %#x, attributes (shareability = %s, cacheability = %s, " |
| 280 | "type = %s, security = %s), flags %#x, handle %#lx " |
| 281 | "tag %lu, memory access descriptor size %u, to %u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 282 | "recipients [", |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 283 | memory_region->sender, |
| 284 | ffa_memory_shareability_name( |
| 285 | memory_region->attributes.shareability), |
| 286 | ffa_memory_cacheability_name( |
| 287 | memory_region->attributes.cacheability), |
| 288 | ffa_memory_type_name(memory_region->attributes.type), |
| 289 | ffa_memory_security_name(memory_region->attributes.security), |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 290 | memory_region->flags, memory_region->handle, memory_region->tag, |
| 291 | memory_region->memory_access_desc_size, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 292 | memory_region->receiver_count); |
| 293 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 294 | struct ffa_memory_access *receiver = |
| 295 | ffa_memory_region_get_receiver(memory_region, i); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 296 | if (i != 0) { |
| 297 | dlog(", "); |
| 298 | } |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 299 | dlog("Receiver %#x: permissions (%s, %s) (offset %u)", |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 300 | receiver->receiver_permissions.receiver, |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 301 | ffa_data_access_name(receiver->receiver_permissions |
| 302 | .permissions.data_access), |
| 303 | ffa_instruction_access_name( |
| 304 | receiver->receiver_permissions.permissions |
| 305 | .instruction_access), |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 306 | receiver->composite_memory_region_offset); |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 307 | /* The impdef field is only present from v1.2 and later */ |
| 308 | if (ffa_version_from_memory_access_desc_size( |
| 309 | memory_region->memory_access_desc_size) >= |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 310 | FFA_VERSION_1_2) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 311 | dlog(", impdef: %#lx %#lx", receiver->impdef.val[0], |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 312 | receiver->impdef.val[1]); |
| 313 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 314 | } |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 315 | dlog("] at offset %u", memory_region->receivers_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 316 | } |
| 317 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 318 | void dump_share_states(void) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 319 | { |
| 320 | uint32_t i; |
| 321 | |
| 322 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | dlog("Current share states:\n"); |
| 327 | sl_lock(&share_states_lock_instance); |
| 328 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 329 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 330 | switch (share_states[i].share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 331 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 332 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 333 | dlog("SHARE"); |
| 334 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 335 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 336 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 337 | dlog("LEND"); |
| 338 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 339 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 340 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 341 | dlog("DONATE"); |
| 342 | break; |
| 343 | default: |
| 344 | dlog("invalid share_func %#x", |
| 345 | share_states[i].share_func); |
| 346 | } |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 347 | dlog(" %#lx (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 348 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 349 | if (share_states[i].sending_complete) { |
| 350 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 351 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 352 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 353 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 354 | dlog(" with %d fragments, %d retrieved, " |
| 355 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 356 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 357 | share_states[i].retrieved_fragment_count[0], |
| 358 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 359 | } |
| 360 | } |
| 361 | sl_unlock(&share_states_lock_instance); |
| 362 | } |
| 363 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 364 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 365 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 366 | { |
| 367 | uint32_t mode = 0; |
| 368 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 369 | switch (permissions.data_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 370 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 371 | mode = MM_MODE_R; |
| 372 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 373 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 374 | mode = MM_MODE_R | MM_MODE_W; |
| 375 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 376 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 377 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 378 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 379 | case FFA_DATA_ACCESS_RESERVED: |
| 380 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 381 | } |
| 382 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 383 | switch (permissions.instruction_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 384 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 385 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 386 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 387 | mode |= MM_MODE_X; |
| 388 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 389 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 390 | mode |= (default_mode & MM_MODE_X); |
| 391 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 392 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 393 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 394 | } |
| 395 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 396 | /* Set the security state bit if necessary. */ |
| 397 | if ((default_mode & plat_ffa_other_world_mode()) != 0) { |
| 398 | mode |= plat_ffa_other_world_mode(); |
| 399 | } |
| 400 | |
Daniel Boulby | 6e26136 | 2024-06-13 16:53:00 +0100 | [diff] [blame^] | 401 | mode |= default_mode & MM_MODE_D; |
| 402 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 403 | return mode; |
| 404 | } |
| 405 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 406 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 407 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 408 | * pages in the given constituents, if they all have the same mode, or return |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 409 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 410 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 411 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 412 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 413 | struct ffa_memory_region_constituent **fragments, |
| 414 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 415 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 416 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 417 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 418 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 419 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 420 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 421 | * Fail if there are no constituents. Otherwise we would get an |
| 422 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 423 | */ |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 424 | dlog_verbose("%s: no constituents\n", __func__); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 425 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 426 | } |
| 427 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 428 | for (i = 0; i < fragment_count; ++i) { |
| 429 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 430 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 431 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 432 | ipaddr_t end = ipa_add(begin, size); |
| 433 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 434 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 435 | /* Fail if addresses are not page-aligned. */ |
| 436 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 437 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 438 | dlog_verbose("%s: addresses not page-aligned\n", |
| 439 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 440 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 441 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 442 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 443 | /* |
| 444 | * Ensure that this constituent memory range is all |
| 445 | * mapped with the same mode. |
| 446 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 447 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 448 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 449 | "%s: constituent memory range " |
| 450 | "%#lx..%#lx " |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 451 | "not mapped with the same mode\n", |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 452 | __func__, begin.ipa, end.ipa); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 453 | return ffa_error(FFA_DENIED); |
| 454 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 455 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 456 | /* |
| 457 | * Ensure that all constituents are mapped with the same |
| 458 | * mode. |
| 459 | */ |
| 460 | if (i == 0) { |
| 461 | *orig_mode = current_mode; |
| 462 | } else if (current_mode != *orig_mode) { |
| 463 | dlog_verbose( |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 464 | "%s: expected mode %#x but was %#x for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 465 | "%d pages at %#lx.\n", |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 466 | __func__, *orig_mode, current_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 467 | fragments[i][j].page_count, |
| 468 | ipa_addr(begin)); |
| 469 | return ffa_error(FFA_DENIED); |
| 470 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 471 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 472 | } |
| 473 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 474 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 477 | enum ffa_version ffa_version_from_memory_access_desc_size( |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 478 | uint32_t memory_access_desc_size) |
| 479 | { |
| 480 | switch (memory_access_desc_size) { |
| 481 | /* |
| 482 | * v1.0 and v1.1 memory access descriptors are the same size however |
| 483 | * v1.1 is the first version to include the memory access descriptor |
| 484 | * size field so return v1.1. |
| 485 | */ |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 486 | case sizeof(struct ffa_memory_access_v1_0): |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 487 | return FFA_VERSION_1_1; |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 488 | case sizeof(struct ffa_memory_access): |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 489 | return FFA_VERSION_1_2; |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 490 | } |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Check if the receivers size and offset given is valid for the senders |
| 496 | * FF-A version. |
| 497 | */ |
| 498 | static bool receiver_size_and_offset_valid_for_version( |
| 499 | uint32_t receivers_size, uint32_t receivers_offset, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 500 | enum ffa_version ffa_version) |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 501 | { |
| 502 | /* |
| 503 | * Check that the version that the memory access descriptor size belongs |
| 504 | * to is compatible with the FF-A version we believe the sender to be. |
| 505 | */ |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 506 | enum ffa_version expected_ffa_version = |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 507 | ffa_version_from_memory_access_desc_size(receivers_size); |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 508 | if (!ffa_versions_are_compatible(expected_ffa_version, ffa_version)) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 509 | return false; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Check the receivers_offset matches the version we found from |
| 514 | * memory access descriptor size. |
| 515 | */ |
| 516 | switch (expected_ffa_version) { |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 517 | case FFA_VERSION_1_1: |
| 518 | case FFA_VERSION_1_2: |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 519 | return receivers_offset == sizeof(struct ffa_memory_region); |
| 520 | default: |
| 521 | return false; |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | /** |
| 526 | * Check the values set for fields in the memory region are valid and safe. |
| 527 | * Offset values are within safe bounds, receiver count will not cause overflows |
| 528 | * and reserved fields are 0. |
| 529 | */ |
| 530 | bool ffa_memory_region_sanity_check(struct ffa_memory_region *memory_region, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 531 | enum ffa_version ffa_version, |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 532 | uint32_t fragment_length, |
| 533 | bool send_transaction) |
| 534 | { |
| 535 | uint32_t receiver_count; |
| 536 | struct ffa_memory_access *receiver; |
| 537 | uint32_t composite_offset_0; |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 538 | struct ffa_memory_region_v1_0 *memory_region_v1_0 = |
| 539 | (struct ffa_memory_region_v1_0 *)memory_region; |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 540 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 541 | if (ffa_version == FFA_VERSION_1_0) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 542 | /* Check the reserved fields are 0. */ |
| 543 | if (memory_region_v1_0->reserved_0 != 0 || |
| 544 | memory_region_v1_0->reserved_1 != 0) { |
| 545 | dlog_verbose("Reserved fields must be 0.\n"); |
| 546 | return false; |
| 547 | } |
| 548 | |
| 549 | receiver_count = memory_region_v1_0->receiver_count; |
| 550 | } else { |
| 551 | uint32_t receivers_size = |
| 552 | memory_region->memory_access_desc_size; |
| 553 | uint32_t receivers_offset = memory_region->receivers_offset; |
| 554 | |
| 555 | /* Check the reserved field is 0. */ |
| 556 | if (memory_region->reserved[0] != 0 || |
| 557 | memory_region->reserved[1] != 0 || |
| 558 | memory_region->reserved[2] != 0) { |
| 559 | dlog_verbose("Reserved fields must be 0.\n"); |
| 560 | return false; |
| 561 | } |
| 562 | |
| 563 | /* |
| 564 | * Check memory_access_desc_size matches the size of the struct |
| 565 | * for the senders FF-A version. |
| 566 | */ |
| 567 | if (!receiver_size_and_offset_valid_for_version( |
| 568 | receivers_size, receivers_offset, ffa_version)) { |
| 569 | dlog_verbose( |
| 570 | "Invalid memory access descriptor size %d, " |
| 571 | " or receiver offset %d, " |
| 572 | "for FF-A version %#x\n", |
| 573 | receivers_size, receivers_offset, ffa_version); |
| 574 | return false; |
| 575 | } |
| 576 | |
| 577 | receiver_count = memory_region->receiver_count; |
| 578 | } |
| 579 | |
| 580 | /* Check receiver count is not too large. */ |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 581 | if (receiver_count > MAX_MEM_SHARE_RECIPIENTS || receiver_count < 1) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 582 | dlog_verbose( |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 583 | "Receiver count must be 0 < receiver_count < %u " |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 584 | "specified %u\n", |
| 585 | MAX_MEM_SHARE_RECIPIENTS, receiver_count); |
| 586 | return false; |
| 587 | } |
| 588 | |
| 589 | /* Check values in the memory access descriptors. */ |
| 590 | /* |
| 591 | * The composite offset values must be the same for all recievers so |
| 592 | * check the first one is valid and then they are all the same. |
| 593 | */ |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 594 | receiver = ffa_version == FFA_VERSION_1_0 |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 595 | ? (struct ffa_memory_access *)&memory_region_v1_0 |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 596 | ->receivers[0] |
| 597 | : ffa_memory_region_get_receiver(memory_region, 0); |
| 598 | assert(receiver != NULL); |
| 599 | composite_offset_0 = receiver->composite_memory_region_offset; |
| 600 | |
| 601 | if (!send_transaction) { |
| 602 | if (composite_offset_0 != 0) { |
| 603 | dlog_verbose( |
| 604 | "Composite offset memory region descriptor " |
| 605 | "offset must be 0 for retrieve requests. " |
| 606 | "Currently %d", |
| 607 | composite_offset_0); |
| 608 | return false; |
| 609 | } |
| 610 | } else { |
| 611 | bool comp_offset_is_zero = composite_offset_0 == 0U; |
| 612 | bool comp_offset_lt_transaction_descriptor_size = |
| 613 | composite_offset_0 < |
| 614 | (sizeof(struct ffa_memory_region) + |
| 615 | (uint32_t)(memory_region->memory_access_desc_size * |
| 616 | memory_region->receiver_count)); |
| 617 | bool comp_offset_with_comp_gt_fragment_length = |
| 618 | composite_offset_0 + |
| 619 | sizeof(struct ffa_composite_memory_region) > |
| 620 | fragment_length; |
| 621 | if (comp_offset_is_zero || |
| 622 | comp_offset_lt_transaction_descriptor_size || |
| 623 | comp_offset_with_comp_gt_fragment_length) { |
| 624 | dlog_verbose( |
| 625 | "Invalid composite memory region descriptor " |
| 626 | "offset for send transaction %u\n", |
| 627 | composite_offset_0); |
| 628 | return false; |
| 629 | } |
| 630 | } |
| 631 | |
Karl Meakin | 824b63d | 2024-06-03 19:04:53 +0100 | [diff] [blame] | 632 | for (size_t i = 0; i < memory_region->receiver_count; i++) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 633 | uint32_t composite_offset; |
| 634 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 635 | if (ffa_version == FFA_VERSION_1_0) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 636 | struct ffa_memory_access_v1_0 *receiver_v1_0 = |
| 637 | &memory_region_v1_0->receivers[i]; |
| 638 | /* Check reserved fields are 0 */ |
| 639 | if (receiver_v1_0->reserved_0 != 0) { |
| 640 | dlog_verbose( |
| 641 | "Reserved field in the memory access " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 642 | "descriptor must be zero. Currently " |
| 643 | "reciever %zu has a reserved field " |
| 644 | "with a value of %lu\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 645 | i, receiver_v1_0->reserved_0); |
| 646 | return false; |
| 647 | } |
| 648 | /* |
| 649 | * We can cast to the current version receiver as the |
| 650 | * remaining fields we are checking have the same |
| 651 | * offsets for all versions since memory access |
| 652 | * descriptors are forwards compatible. |
| 653 | */ |
| 654 | receiver = (struct ffa_memory_access *)receiver_v1_0; |
| 655 | } else { |
| 656 | receiver = ffa_memory_region_get_receiver(memory_region, |
| 657 | i); |
| 658 | assert(receiver != NULL); |
| 659 | |
| 660 | if (receiver->reserved_0 != 0) { |
| 661 | dlog_verbose( |
| 662 | "Reserved field in the memory access " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 663 | "descriptor must be zero. Currently " |
| 664 | "reciever %zu has a reserved field " |
| 665 | "with a value of %lu\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 666 | i, receiver->reserved_0); |
| 667 | return false; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | /* Check composite offset values are equal for all receivers. */ |
| 672 | composite_offset = receiver->composite_memory_region_offset; |
| 673 | if (composite_offset != composite_offset_0) { |
| 674 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 675 | "Composite offset %x differs from %x in " |
| 676 | "index\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 677 | composite_offset, composite_offset_0); |
| 678 | return false; |
| 679 | } |
| 680 | } |
| 681 | return true; |
| 682 | } |
| 683 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 684 | /** |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 685 | * If the receivers for the memory management operation are all from the |
| 686 | * secure world and this isn't a FFA_MEM_SHARE, then request memory security |
| 687 | * state update by returning MAP_ACTION_CHECK_PROTECT. |
| 688 | */ |
| 689 | static enum ffa_map_action ffa_mem_send_get_map_action( |
| 690 | bool all_receivers_from_current_world, ffa_id_t sender_id, |
| 691 | uint32_t mem_func_id) |
| 692 | { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 693 | const bool is_memory_share_abi = mem_func_id == FFA_MEM_SHARE_32 || |
| 694 | mem_func_id == FFA_MEM_SHARE_64; |
| 695 | const bool protect_memory = |
| 696 | (!is_memory_share_abi && all_receivers_from_current_world && |
| 697 | ffa_is_vm_id(sender_id)); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 698 | |
| 699 | return protect_memory ? MAP_ACTION_CHECK_PROTECT : MAP_ACTION_CHECK; |
| 700 | } |
| 701 | |
| 702 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 703 | * Verify that all pages have the same mode, that the starting mode |
| 704 | * constitutes a valid state and obtain the next mode to apply |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 705 | * to the sending VM. It outputs the mapping action that needs to be |
| 706 | * invoked for the given memory range. On memory lend/donate there |
| 707 | * could be a need to protect the memory from the normal world. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 708 | * |
| 709 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 710 | * 1) FFA_DENIED if a state transition was not found; |
| 711 | * 2) FFA_DENIED if the pages being shared do not have the same mode within |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 712 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 713 | * 3) FFA_INVALID_PARAMETERS if the beginning and end IPAs are not page |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 714 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 715 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 716 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 717 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 718 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 719 | struct vm_locked from, uint32_t share_func, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 720 | struct ffa_memory_region *memory_region, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 721 | struct ffa_memory_region_constituent **fragments, |
| 722 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 723 | uint32_t *from_mode, enum ffa_map_action *map_action, bool zero) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 724 | { |
| 725 | const uint32_t state_mask = |
| 726 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 727 | struct ffa_value ret; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 728 | bool all_receivers_from_current_world = true; |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 729 | uint32_t receivers_count = memory_region->receiver_count; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 730 | const bool is_memory_lend = (share_func == FFA_MEM_LEND_32) || |
| 731 | (share_func == FFA_MEM_LEND_64); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 732 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 733 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 734 | fragment_constituent_counts, |
| 735 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 736 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 737 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 738 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 739 | } |
| 740 | |
Daniel Boulby | 6e26136 | 2024-06-13 16:53:00 +0100 | [diff] [blame^] | 741 | /* |
| 742 | * Check requested memory type is valid with the memory type of the |
| 743 | * owner. E.g. they follow the memory type precedence where Normal |
| 744 | * memory is more permissive than device and therefore device memory |
| 745 | * can only be shared as device memory. |
| 746 | */ |
| 747 | if (memory_region->attributes.type == FFA_MEMORY_NORMAL_MEM && |
| 748 | (*orig_from_mode & MM_MODE_D) != 0U) { |
| 749 | dlog_verbose( |
| 750 | "Send device memory as Normal memory is not allowed\n"); |
| 751 | return ffa_error(FFA_DENIED); |
| 752 | } |
| 753 | |
Daniel Boulby | 63af1fa | 2024-03-18 14:17:31 +0000 | [diff] [blame] | 754 | /* Device memory regions can only be lent a single borrower. */ |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 755 | if ((*orig_from_mode & MM_MODE_D) != 0U && |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 756 | !(is_memory_lend && receivers_count == 1)) { |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 757 | dlog_verbose( |
Daniel Boulby | 63af1fa | 2024-03-18 14:17:31 +0000 | [diff] [blame] | 758 | "Device memory can only be lent to a single borrower " |
| 759 | "(mode is %#x).\n", |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 760 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 761 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | /* |
| 765 | * Ensure the sender is the owner and has exclusive access to the |
| 766 | * memory. |
| 767 | */ |
| 768 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 769 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 770 | } |
| 771 | |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 772 | /* |
| 773 | * Memory cannot be zeroed during the lend/donate operation if the |
| 774 | * sender only has RO access. |
| 775 | */ |
| 776 | if ((*orig_from_mode & MM_MODE_W) == 0 && zero == true) { |
| 777 | dlog_verbose( |
| 778 | "Cannot zero memory when the sender doesn't have " |
| 779 | "write access\n"); |
| 780 | return ffa_error(FFA_DENIED); |
| 781 | } |
| 782 | |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 783 | assert(receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 784 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 785 | for (uint32_t i = 0U; i < receivers_count; i++) { |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 786 | struct ffa_memory_access *receiver = |
| 787 | ffa_memory_region_get_receiver(memory_region, i); |
| 788 | assert(receiver != NULL); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 789 | ffa_memory_access_permissions_t permissions = |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 790 | receiver->receiver_permissions.permissions; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 791 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 792 | permissions, *orig_from_mode); |
| 793 | |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 794 | /* |
| 795 | * The assumption is that at this point, the operation from |
| 796 | * SP to a receiver VM, should have returned an FFA_ERROR |
| 797 | * already. |
| 798 | */ |
| 799 | if (!ffa_is_vm_id(from.vm->id)) { |
| 800 | assert(!ffa_is_vm_id( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 801 | receiver->receiver_permissions.receiver)); |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 802 | } |
| 803 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 804 | /* Track if all senders are from current world. */ |
| 805 | all_receivers_from_current_world = |
| 806 | all_receivers_from_current_world && |
| 807 | vm_id_is_current_world( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 808 | receiver->receiver_permissions.receiver); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 809 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 810 | if ((*orig_from_mode & required_from_mode) != |
| 811 | required_from_mode) { |
| 812 | dlog_verbose( |
| 813 | "Sender tried to send memory with permissions " |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 814 | "which required mode %#x but only had %#x " |
| 815 | "itself.\n", |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 816 | required_from_mode, *orig_from_mode); |
| 817 | return ffa_error(FFA_DENIED); |
| 818 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 819 | } |
| 820 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 821 | *map_action = ffa_mem_send_get_map_action( |
| 822 | all_receivers_from_current_world, from.vm->id, share_func); |
| 823 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 824 | /* Find the appropriate new mode. */ |
| 825 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 826 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 827 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 828 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 829 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 830 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 831 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 832 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 833 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 834 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 835 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 836 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 837 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 838 | break; |
| 839 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 840 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 841 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 842 | } |
| 843 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 844 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 845 | } |
| 846 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 847 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 848 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 849 | struct ffa_memory_region_constituent **fragments, |
| 850 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 851 | uint32_t *from_mode, enum ffa_map_action *map_action) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 852 | { |
| 853 | const uint32_t state_mask = |
| 854 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 855 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 856 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 857 | |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 858 | assert(map_action != NULL); |
| 859 | if (vm_id_is_current_world(from.vm->id)) { |
| 860 | *map_action = MAP_ACTION_COMMIT; |
| 861 | } else { |
| 862 | /* |
| 863 | * No need to check the attributes of caller. |
| 864 | * The assumption is that the retrieve request of the receiver |
| 865 | * also used the MAP_ACTION_NONE, and no update was done to the |
| 866 | * page tables. When the receiver is not at the secure virtual |
| 867 | * instance SPMC doesn't manage its S2 translation (i.e. when |
| 868 | * the receiver is a VM). |
| 869 | */ |
| 870 | *map_action = MAP_ACTION_NONE; |
| 871 | |
| 872 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 873 | } |
| 874 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 875 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 876 | fragment_constituent_counts, |
| 877 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 878 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 879 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 880 | } |
| 881 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 882 | /* |
| 883 | * Ensure the relinquishing VM is not the owner but has access to the |
| 884 | * memory. |
| 885 | */ |
| 886 | orig_from_state = *orig_from_mode & state_mask; |
| 887 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 888 | dlog_verbose( |
| 889 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 890 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 891 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 892 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | /* Find the appropriate new mode. */ |
| 896 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 897 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 898 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | /** |
| 902 | * Verify that all pages have the same mode, that the starting mode |
| 903 | * constitutes a valid state and obtain the next mode to apply |
| 904 | * to the retrieving VM. |
| 905 | * |
| 906 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 907 | * 1) FFA_DENIED if a state transition was not found; |
| 908 | * 2) FFA_DENIED if the pages being shared do not have the same mode within |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 909 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 910 | * 3) FFA_INVALID_PARAMETERS if the beginning and end IPAs are not page |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 911 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 912 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 913 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 914 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 915 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 916 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 917 | struct ffa_memory_region_constituent **fragments, |
| 918 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 919 | uint32_t memory_to_attributes, uint32_t *to_mode, bool memory_protected, |
| 920 | enum ffa_map_action *map_action) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 921 | { |
| 922 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 923 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 924 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 925 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 926 | fragment_constituent_counts, |
| 927 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 928 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 929 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 930 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 931 | } |
| 932 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 933 | /* Find the appropriate new mode. */ |
| 934 | *to_mode = memory_to_attributes; |
| 935 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 936 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 937 | /* |
| 938 | * If the original ffa memory send call has been processed |
| 939 | * successfully, it is expected the orig_to_mode would overlay |
| 940 | * with `state_mask`, as a result of the function |
| 941 | * `ffa_send_check_transition`. |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 942 | * |
| 943 | * If Hafnium is the SPMC: |
| 944 | * - Caller of the reclaim interface is an SP, the memory shall |
| 945 | * have been protected throughout the flow. |
| 946 | * - Caller of the reclaim is from the NWd, the memory may have |
| 947 | * been protected at the time of lending/donating the memory. |
| 948 | * In such case, set action to unprotect memory in the |
| 949 | * handling of reclaim operation. |
| 950 | * - If Hafnium is the hypervisor memory shall never have been |
| 951 | * protected in memory lend/share/donate. |
| 952 | * |
| 953 | * More details in the doc comment of the function |
| 954 | * `ffa_region_group_identity_map`. |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 955 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 956 | if (vm_id_is_current_world(to.vm->id)) { |
| 957 | assert((orig_to_mode & |
| 958 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 959 | MM_MODE_SHARED)) != 0U); |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 960 | assert(!memory_protected); |
| 961 | } else if (to.vm->id == HF_OTHER_WORLD_ID && |
| 962 | map_action != NULL && memory_protected) { |
| 963 | *map_action = MAP_ACTION_COMMIT_UNPROTECT; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 964 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 965 | } else { |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 966 | if (!vm_id_is_current_world(to.vm->id)) { |
| 967 | assert(map_action != NULL); |
| 968 | *map_action = MAP_ACTION_NONE; |
| 969 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 970 | } |
| 971 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 972 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 973 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 974 | * Ensure the retriever has the expected state. We don't care |
| 975 | * about the MM_MODE_SHARED bit; either with or without it set |
| 976 | * are both valid representations of the !O-NA state. |
| 977 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 978 | if (vm_id_is_current_world(to.vm->id) && |
Karl Meakin | 5e99699 | 2024-05-20 11:27:07 +0100 | [diff] [blame] | 979 | !vm_is_primary(to.vm) && |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 980 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 981 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 982 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 983 | } |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 984 | |
| 985 | /* |
| 986 | * If memory has been protected before, clear the NS bit to |
| 987 | * allow the secure access from the SP. |
| 988 | */ |
| 989 | if (memory_protected) { |
| 990 | *to_mode &= ~plat_ffa_other_world_mode(); |
| 991 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 992 | } |
| 993 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 994 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 995 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 996 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 997 | *to_mode |= 0; |
| 998 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 999 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1000 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1001 | *to_mode |= MM_MODE_UNOWNED; |
| 1002 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 1003 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1004 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1005 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 1006 | break; |
| 1007 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1008 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1009 | *to_mode |= 0; |
| 1010 | break; |
| 1011 | |
| 1012 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1013 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1014 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1017 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 1018 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1019 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1020 | /* |
| 1021 | * Performs the operations related to the `action` MAP_ACTION_CHECK*. |
| 1022 | * Returns: |
| 1023 | * - FFA_SUCCESS_32: if all goes well. |
| 1024 | * - FFA_ERROR_32: with FFA_NO_MEMORY, if there is no memory to manage |
| 1025 | * the page table update. Or error code provided by the function |
| 1026 | * `arch_memory_protect`. |
| 1027 | */ |
| 1028 | static struct ffa_value ffa_region_group_check_actions( |
| 1029 | struct vm_locked vm_locked, paddr_t pa_begin, paddr_t pa_end, |
| 1030 | struct mpool *ppool, uint32_t mode, enum ffa_map_action action, |
| 1031 | bool *memory_protected) |
| 1032 | { |
| 1033 | struct ffa_value ret; |
| 1034 | bool is_memory_protected; |
| 1035 | |
| 1036 | if (!vm_identity_prepare(vm_locked, pa_begin, pa_end, mode, ppool)) { |
| 1037 | dlog_verbose( |
| 1038 | "%s: memory can't be mapped to %x due to lack of " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1039 | "memory. Base: %lx end: %lx\n", |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1040 | __func__, vm_locked.vm->id, pa_addr(pa_begin), |
| 1041 | pa_addr(pa_end)); |
| 1042 | return ffa_error(FFA_NO_MEMORY); |
| 1043 | } |
| 1044 | |
| 1045 | switch (action) { |
| 1046 | case MAP_ACTION_CHECK: |
| 1047 | /* No protect requested. */ |
| 1048 | is_memory_protected = false; |
| 1049 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1050 | break; |
| 1051 | case MAP_ACTION_CHECK_PROTECT: { |
| 1052 | paddr_t last_protected_pa = pa_init(0); |
| 1053 | |
| 1054 | ret = arch_memory_protect(pa_begin, pa_end, &last_protected_pa); |
| 1055 | |
| 1056 | is_memory_protected = (ret.func == FFA_SUCCESS_32); |
| 1057 | |
| 1058 | /* |
| 1059 | * - If protect memory has failed with FFA_DENIED, means some |
| 1060 | * range of memory was in the wrong state. In such case, SPM |
| 1061 | * reverts the state of the pages that were successfully |
| 1062 | * updated. |
| 1063 | * - If protect memory has failed with FFA_NOT_SUPPORTED, it |
| 1064 | * means the platform doesn't support the protection mechanism. |
| 1065 | * That said, it still permits the page table update to go |
| 1066 | * through. The variable |
| 1067 | * `is_memory_protected` will be equal to false. |
| 1068 | * - If protect memory has failed with FFA_INVALID_PARAMETERS, |
| 1069 | * break from switch and return the error. |
| 1070 | */ |
| 1071 | if (ret.func == FFA_ERROR_32) { |
| 1072 | assert(!is_memory_protected); |
| 1073 | if (ffa_error_code(ret) == FFA_DENIED && |
| 1074 | pa_addr(last_protected_pa) != (uintptr_t)0) { |
| 1075 | CHECK(arch_memory_unprotect( |
| 1076 | pa_begin, |
| 1077 | pa_add(last_protected_pa, PAGE_SIZE))); |
| 1078 | } else if (ffa_error_code(ret) == FFA_NOT_SUPPORTED) { |
| 1079 | ret = (struct ffa_value){ |
| 1080 | .func = FFA_SUCCESS_32, |
| 1081 | }; |
| 1082 | } |
| 1083 | } |
| 1084 | } break; |
| 1085 | default: |
| 1086 | panic("%s: invalid action to process %x\n", __func__, action); |
| 1087 | } |
| 1088 | |
| 1089 | if (memory_protected != NULL) { |
| 1090 | *memory_protected = is_memory_protected; |
| 1091 | } |
| 1092 | |
| 1093 | return ret; |
| 1094 | } |
| 1095 | |
| 1096 | static void ffa_region_group_commit_actions(struct vm_locked vm_locked, |
| 1097 | paddr_t pa_begin, paddr_t pa_end, |
| 1098 | struct mpool *ppool, uint32_t mode, |
| 1099 | enum ffa_map_action action) |
| 1100 | { |
| 1101 | switch (action) { |
| 1102 | case MAP_ACTION_COMMIT_UNPROTECT: |
| 1103 | /* |
| 1104 | * Checking that it should succeed because SPM should be |
| 1105 | * unprotecting memory that it had protected before. |
| 1106 | */ |
| 1107 | CHECK(arch_memory_unprotect(pa_begin, pa_end)); |
| 1108 | case MAP_ACTION_COMMIT: |
| 1109 | vm_identity_commit(vm_locked, pa_begin, pa_end, mode, ppool, |
| 1110 | NULL); |
| 1111 | break; |
| 1112 | default: |
| 1113 | panic("%s: invalid action to process %x\n", __func__, action); |
| 1114 | } |
| 1115 | } |
| 1116 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1117 | /** |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1118 | * Helper function to revert a failed "Protect" action from the SPMC: |
| 1119 | * - `fragment_count`: should specify the number of fragments to traverse from |
| 1120 | * `fragments`. This may not be the full amount of fragments that are part of |
| 1121 | * the share_state structure. |
| 1122 | * - `fragment_constituent_counts`: array holding the amount of constituents |
| 1123 | * per fragment. |
| 1124 | * - `end`: pointer to the constituent that failed the "protect" action. It |
| 1125 | * shall be part of the last fragment, and it shall make the loop below break. |
| 1126 | */ |
| 1127 | static void ffa_region_group_fragments_revert_protect( |
| 1128 | struct ffa_memory_region_constituent **fragments, |
| 1129 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1130 | const struct ffa_memory_region_constituent *end) |
| 1131 | { |
| 1132 | for (uint32_t i = 0; i < fragment_count; ++i) { |
| 1133 | for (uint32_t j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 1134 | struct ffa_memory_region_constituent *constituent = |
| 1135 | &fragments[i][j]; |
| 1136 | size_t size = constituent->page_count * PAGE_SIZE; |
| 1137 | paddr_t pa_begin = |
| 1138 | pa_from_ipa(ipa_init(constituent->address)); |
| 1139 | paddr_t pa_end = pa_add(pa_begin, size); |
| 1140 | |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1141 | dlog_verbose("%s: reverting fragment %lx size %zx\n", |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1142 | __func__, pa_addr(pa_begin), size); |
| 1143 | |
| 1144 | if (constituent == end) { |
| 1145 | /* |
| 1146 | * The last constituent is expected to be in the |
| 1147 | * last fragment. |
| 1148 | */ |
| 1149 | assert(i == fragment_count - 1); |
| 1150 | break; |
| 1151 | } |
| 1152 | |
| 1153 | CHECK(arch_memory_unprotect(pa_begin, pa_end)); |
| 1154 | } |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | /** |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1159 | * Updates a VM's page table such that the given set of physical address ranges |
| 1160 | * are mapped in the address space at the corresponding address ranges, in the |
| 1161 | * mode provided. |
| 1162 | * |
J-Alves | 0a83dc2 | 2023-05-05 09:50:37 +0100 | [diff] [blame] | 1163 | * The enum ffa_map_action determines the action taken from a call to the |
| 1164 | * function below: |
| 1165 | * - If action is MAP_ACTION_CHECK, the page tables will be allocated from the |
| 1166 | * mpool but no mappings will actually be updated. This function must always |
| 1167 | * be called first with action set to MAP_ACTION_CHECK to check that it will |
| 1168 | * succeed before calling ffa_region_group_identity_map with whichever one of |
| 1169 | * the remaining actions, to avoid leaving the page table in a half-updated |
| 1170 | * state. |
| 1171 | * - The action MAP_ACTION_COMMIT allocates the page tables from the mpool, and |
| 1172 | * changes the memory mappings. |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1173 | * - The action MAP_ACTION_CHECK_PROTECT extends the MAP_ACTION_CHECK with an |
| 1174 | * invocation to the monitor to update the security state of the memory, |
| 1175 | * to that of the SPMC. |
| 1176 | * - The action MAP_ACTION_COMMIT_UNPROTECT extends the MAP_ACTION_COMMIT |
| 1177 | * with a call into the monitor, to reset the security state of memory |
| 1178 | * that has priorly been mapped with the MAP_ACTION_CHECK_PROTECT action. |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1179 | * vm_ptable_defrag should always be called after a series of page table |
| 1180 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1181 | * |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1182 | * If all goes well, returns FFA_SUCCESS_32; or FFA_ERROR, with following |
| 1183 | * error codes: |
| 1184 | * - FFA_INVALID_PARAMETERS: invalid range of memory. |
| 1185 | * - FFA_DENIED: |
| 1186 | * |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1187 | * made to memory mappings. |
| 1188 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1189 | struct ffa_value ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 1190 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1191 | struct ffa_memory_region_constituent **fragments, |
| 1192 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1193 | uint32_t mode, struct mpool *ppool, enum ffa_map_action action, |
| 1194 | bool *memory_protected) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1195 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1196 | uint32_t i; |
| 1197 | uint32_t j; |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1198 | struct ffa_value ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1199 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1200 | if (vm_locked.vm->el0_partition) { |
| 1201 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 1202 | } |
| 1203 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1204 | /* Iterate over the memory region constituents within each fragment. */ |
| 1205 | for (i = 0; i < fragment_count; ++i) { |
| 1206 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1207 | struct ffa_memory_region_constituent *constituent = |
| 1208 | &fragments[i][j]; |
| 1209 | size_t size = constituent->page_count * PAGE_SIZE; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1210 | paddr_t pa_begin = |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1211 | pa_from_ipa(ipa_init(constituent->address)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1212 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 1213 | uint32_t pa_bits = |
| 1214 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1215 | |
| 1216 | /* |
| 1217 | * Ensure the requested region falls into system's PA |
| 1218 | * range. |
| 1219 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 1220 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 1221 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1222 | dlog_error("Region is outside of PA Range\n"); |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1223 | return ffa_error(FFA_INVALID_PARAMETERS); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1224 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1225 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1226 | if (action <= MAP_ACTION_CHECK_PROTECT) { |
| 1227 | ret = ffa_region_group_check_actions( |
| 1228 | vm_locked, pa_begin, pa_end, ppool, |
| 1229 | mode, action, memory_protected); |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1230 | |
| 1231 | if (ret.func == FFA_ERROR_32 && |
| 1232 | ffa_error_code(ret) == FFA_DENIED) { |
| 1233 | if (memory_protected != NULL) { |
| 1234 | assert(!*memory_protected); |
| 1235 | } |
| 1236 | |
| 1237 | ffa_region_group_fragments_revert_protect( |
| 1238 | fragments, |
| 1239 | fragment_constituent_counts, |
| 1240 | i + 1, constituent); |
| 1241 | break; |
| 1242 | } |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1243 | } else if (action >= MAP_ACTION_COMMIT && |
| 1244 | action < MAP_ACTION_MAX) { |
| 1245 | ffa_region_group_commit_actions( |
| 1246 | vm_locked, pa_begin, pa_end, ppool, |
| 1247 | mode, action); |
| 1248 | ret = (struct ffa_value){ |
| 1249 | .func = FFA_SUCCESS_32}; |
| 1250 | } else { |
| 1251 | panic("%s: Unknown ffa_map_action.\n", |
| 1252 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1253 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1254 | } |
| 1255 | } |
| 1256 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1257 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | /** |
| 1261 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 1262 | * flushed from the cache so the memory has been cleared across the system. |
| 1263 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1264 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 1265 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1266 | { |
| 1267 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 1268 | * TODO: change this to a CPU local single page window rather than a |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1269 | * global mapping of the whole range. Such an approach will limit |
| 1270 | * the changes to stage-1 tables and will allow only local |
| 1271 | * invalidation. |
| 1272 | */ |
| 1273 | bool ret; |
| 1274 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1275 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 1276 | MM_MODE_W | (extra_mode_attributes & |
| 1277 | plat_ffa_other_world_mode()), |
| 1278 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1279 | size_t size = pa_difference(begin, end); |
| 1280 | |
| 1281 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1282 | goto fail; |
| 1283 | } |
| 1284 | |
| 1285 | memset_s(ptr, size, 0, size); |
| 1286 | arch_mm_flush_dcache(ptr, size); |
| 1287 | mm_unmap(stage1_locked, begin, end, ppool); |
| 1288 | |
| 1289 | ret = true; |
| 1290 | goto out; |
| 1291 | |
| 1292 | fail: |
| 1293 | ret = false; |
| 1294 | |
| 1295 | out: |
| 1296 | mm_unlock_stage1(&stage1_locked); |
| 1297 | |
| 1298 | return ret; |
| 1299 | } |
| 1300 | |
| 1301 | /** |
| 1302 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 1303 | * flushed from the cache so the memory has been cleared across the system. |
| 1304 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1305 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1306 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1307 | struct ffa_memory_region_constituent **fragments, |
| 1308 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1309 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1310 | { |
| 1311 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1312 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1313 | bool ret = false; |
| 1314 | |
| 1315 | /* |
| 1316 | * Create a local pool so any freed memory can't be used by another |
| 1317 | * thread. This is to ensure each constituent that is mapped can be |
| 1318 | * unmapped again afterwards. |
| 1319 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1320 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1321 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1322 | /* Iterate over the memory region constituents within each fragment. */ |
| 1323 | for (i = 0; i < fragment_count; ++i) { |
| 1324 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1325 | |
J-Alves | 8457f93 | 2023-10-11 16:41:45 +0100 | [diff] [blame] | 1326 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1327 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 1328 | paddr_t begin = |
| 1329 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 1330 | paddr_t end = pa_add(begin, size); |
| 1331 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1332 | if (!clear_memory(begin, end, &local_page_pool, |
| 1333 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1334 | /* |
| 1335 | * api_clear_memory will defrag on failure, so |
| 1336 | * no need to do it here. |
| 1337 | */ |
| 1338 | goto out; |
| 1339 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1340 | } |
| 1341 | } |
| 1342 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1343 | ret = true; |
| 1344 | |
| 1345 | out: |
| 1346 | mpool_fini(&local_page_pool); |
| 1347 | return ret; |
| 1348 | } |
| 1349 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1350 | static bool is_memory_range_within(ipaddr_t begin, ipaddr_t end, |
| 1351 | ipaddr_t in_begin, ipaddr_t in_end) |
| 1352 | { |
| 1353 | return (ipa_addr(begin) >= ipa_addr(in_begin) && |
| 1354 | ipa_addr(begin) < ipa_addr(in_end)) || |
| 1355 | (ipa_addr(end) <= ipa_addr(in_end) && |
| 1356 | ipa_addr(end) > ipa_addr(in_begin)); |
| 1357 | } |
| 1358 | |
| 1359 | /** |
| 1360 | * Receives a memory range and looks for overlaps with the remainder |
| 1361 | * constituents of the memory share/lend/donate operation. Assumes they are |
| 1362 | * passed in order to avoid having to loop over all the elements at each call. |
| 1363 | * The function only compares the received memory ranges with those that follow |
| 1364 | * within the same fragment, and subsequent fragments from the same operation. |
| 1365 | */ |
| 1366 | static bool ffa_memory_check_overlap( |
| 1367 | struct ffa_memory_region_constituent **fragments, |
| 1368 | const uint32_t *fragment_constituent_counts, |
| 1369 | const uint32_t fragment_count, const uint32_t current_fragment, |
| 1370 | const uint32_t current_constituent) |
| 1371 | { |
| 1372 | uint32_t i = current_fragment; |
| 1373 | uint32_t j = current_constituent; |
| 1374 | ipaddr_t current_begin = ipa_init(fragments[i][j].address); |
| 1375 | const uint32_t current_page_count = fragments[i][j].page_count; |
| 1376 | size_t current_size = current_page_count * PAGE_SIZE; |
| 1377 | ipaddr_t current_end = ipa_add(current_begin, current_size - 1); |
| 1378 | |
| 1379 | if (current_size == 0 || |
| 1380 | current_size > UINT64_MAX - ipa_addr(current_begin)) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1381 | dlog_verbose("Invalid page count. Addr: %zx page_count: %x\n", |
| 1382 | current_begin.ipa, current_page_count); |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1383 | return false; |
| 1384 | } |
| 1385 | |
| 1386 | for (; i < fragment_count; i++) { |
| 1387 | j = (i == current_fragment) ? j + 1 : 0; |
| 1388 | |
| 1389 | for (; j < fragment_constituent_counts[i]; j++) { |
| 1390 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 1391 | const uint32_t page_count = fragments[i][j].page_count; |
| 1392 | size_t size = page_count * PAGE_SIZE; |
| 1393 | ipaddr_t end = ipa_add(begin, size - 1); |
| 1394 | |
| 1395 | if (size == 0 || size > UINT64_MAX - ipa_addr(begin)) { |
| 1396 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1397 | "Invalid page count. Addr: %lx " |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1398 | "page_count: %x\n", |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1399 | begin.ipa, page_count); |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1400 | return false; |
| 1401 | } |
| 1402 | |
| 1403 | /* |
| 1404 | * Check if current ranges is within begin and end, as |
| 1405 | * well as the reverse. This should help optimize the |
| 1406 | * loop, and reduce the number of iterations. |
| 1407 | */ |
| 1408 | if (is_memory_range_within(begin, end, current_begin, |
| 1409 | current_end) || |
| 1410 | is_memory_range_within(current_begin, current_end, |
| 1411 | begin, end)) { |
| 1412 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1413 | "Overlapping memory ranges: %#lx - " |
| 1414 | "%#lx with %#lx - %#lx\n", |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1415 | ipa_addr(begin), ipa_addr(end), |
| 1416 | ipa_addr(current_begin), |
| 1417 | ipa_addr(current_end)); |
| 1418 | return true; |
| 1419 | } |
| 1420 | } |
| 1421 | } |
| 1422 | |
| 1423 | return false; |
| 1424 | } |
| 1425 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1426 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1427 | * Validates and prepares memory to be sent from the calling VM to another. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1428 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1429 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1430 | * |
| 1431 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1432 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1433 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1434 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1435 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 1436 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1437 | * 3) FFA_DENIED - The sender doesn't have sufficient access to send the |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1438 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1439 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1440 | */ |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1441 | static struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1442 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1443 | struct ffa_memory_region_constituent **fragments, |
| 1444 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1445 | uint32_t composite_total_page_count, uint32_t share_func, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1446 | struct ffa_memory_region *memory_region, struct mpool *page_pool, |
| 1447 | uint32_t *orig_from_mode_ret, bool *memory_protected) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1448 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1449 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1450 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1451 | uint32_t orig_from_mode; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1452 | uint32_t clean_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1453 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1454 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1455 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1456 | uint32_t constituents_total_page_count = 0; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1457 | enum ffa_map_action map_action = MAP_ACTION_CHECK; |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1458 | bool clear = memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1459 | |
| 1460 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1461 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1462 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1463 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1464 | for (i = 0; i < fragment_count; ++i) { |
| 1465 | if (!is_aligned(fragments[i], 8)) { |
| 1466 | dlog_verbose("Constituents not aligned.\n"); |
| 1467 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1468 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1469 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 1470 | constituents_total_page_count += |
| 1471 | fragments[i][j].page_count; |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1472 | if (ffa_memory_check_overlap( |
| 1473 | fragments, fragment_constituent_counts, |
| 1474 | fragment_count, i, j)) { |
| 1475 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1476 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1477 | } |
| 1478 | } |
| 1479 | |
| 1480 | if (constituents_total_page_count != composite_total_page_count) { |
| 1481 | dlog_verbose( |
| 1482 | "Composite page count differs from calculated page " |
| 1483 | "count from constituents.\n"); |
| 1484 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1488 | * Check if the state transition is lawful for the sender, ensure that |
| 1489 | * all constituents of a memory region being shared are at the same |
| 1490 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1491 | */ |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1492 | ret = ffa_send_check_transition( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1493 | from_locked, share_func, memory_region, &orig_from_mode, |
| 1494 | fragments, fragment_constituent_counts, fragment_count, |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 1495 | &from_mode, &map_action, clear); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1496 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1497 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1498 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1499 | } |
| 1500 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1501 | if (orig_from_mode_ret != NULL) { |
| 1502 | *orig_from_mode_ret = orig_from_mode; |
| 1503 | } |
| 1504 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1505 | /* |
| 1506 | * Create a local pool so any freed memory can't be used by another |
| 1507 | * thread. This is to ensure the original mapping can be restored if the |
| 1508 | * clear fails. |
| 1509 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1510 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1511 | |
| 1512 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1513 | * First reserve all required memory for the new page table entries |
| 1514 | * without committing, to make sure the entire operation will succeed |
| 1515 | * without exhausting the page pool. |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1516 | * Provide the map_action as populated by 'ffa_send_check_transition'. |
| 1517 | * It may request memory to be protected. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1518 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1519 | ret = ffa_region_group_identity_map( |
| 1520 | from_locked, fragments, fragment_constituent_counts, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1521 | fragment_count, from_mode, page_pool, map_action, |
| 1522 | memory_protected); |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1523 | if (ret.func == FFA_ERROR_32) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1524 | goto out; |
| 1525 | } |
| 1526 | |
| 1527 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1528 | * Update the mapping for the sender. This won't allocate because the |
| 1529 | * transaction was already prepared above, but may free pages in the |
| 1530 | * case that a whole block is being unmapped that was previously |
| 1531 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1532 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1533 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1534 | from_locked, fragments, fragment_constituent_counts, |
| 1535 | fragment_count, from_mode, &local_page_pool, |
| 1536 | MAP_ACTION_COMMIT, NULL) |
| 1537 | .func == FFA_SUCCESS_32); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1538 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1539 | /* |
| 1540 | * If memory has been protected, it is now part of the secure PAS |
| 1541 | * (happens for lend/donate from NWd to SWd), and the `orig_from_mode` |
| 1542 | * should have the MM_MODE_NS set, as such mask it in `clean_mode` for |
| 1543 | * SPM's S1 translation. |
| 1544 | * In case memory hasn't been protected, and it is in the non-secure |
| 1545 | * PAS (e.g. memory share from NWd to SWd), as such the SPM needs to |
| 1546 | * perform a non-secure memory access. In such case `clean_mode` takes |
| 1547 | * the same mode as `orig_from_mode`. |
| 1548 | */ |
| 1549 | clean_mode = (memory_protected != NULL && *memory_protected) |
| 1550 | ? orig_from_mode & ~plat_ffa_other_world_mode() |
| 1551 | : orig_from_mode; |
| 1552 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1553 | /* Clear the memory so no VM or device can see the previous contents. */ |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1554 | if (clear && !ffa_clear_memory_constituents( |
| 1555 | clean_mode, fragments, fragment_constituent_counts, |
| 1556 | fragment_count, page_pool)) { |
| 1557 | map_action = (memory_protected != NULL && *memory_protected) |
| 1558 | ? MAP_ACTION_COMMIT_UNPROTECT |
| 1559 | : MAP_ACTION_COMMIT; |
| 1560 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1561 | /* |
| 1562 | * On failure, roll back by returning memory to the sender. This |
| 1563 | * may allocate pages which were previously freed into |
| 1564 | * `local_page_pool` by the call above, but will never allocate |
| 1565 | * more pages than that so can never fail. |
| 1566 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1567 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1568 | from_locked, fragments, |
| 1569 | fragment_constituent_counts, fragment_count, |
| 1570 | orig_from_mode, &local_page_pool, |
| 1571 | MAP_ACTION_COMMIT, NULL) |
| 1572 | .func == FFA_SUCCESS_32); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1573 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1574 | goto out; |
| 1575 | } |
| 1576 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1577 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1578 | |
| 1579 | out: |
| 1580 | mpool_fini(&local_page_pool); |
| 1581 | |
| 1582 | /* |
| 1583 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1584 | * error) or merging entries into blocks where possible (on success). |
| 1585 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1586 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1587 | |
| 1588 | return ret; |
| 1589 | } |
| 1590 | |
| 1591 | /** |
| 1592 | * Validates and maps memory shared from one VM to another. |
| 1593 | * |
| 1594 | * This function requires the calling context to hold the <to> lock. |
| 1595 | * |
| 1596 | * Returns: |
| 1597 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1598 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1599 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1600 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1601 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1602 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1603 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1604 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1605 | struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1606 | struct ffa_memory_region_constituent **fragments, |
| 1607 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1608 | uint32_t sender_orig_mode, uint32_t share_func, bool clear, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1609 | struct mpool *page_pool, uint32_t *response_mode, bool memory_protected) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1610 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1611 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1612 | uint32_t to_mode; |
| 1613 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1614 | struct ffa_value ret; |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 1615 | enum ffa_map_action map_action = MAP_ACTION_COMMIT; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1616 | |
| 1617 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1618 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1619 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1620 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1621 | for (i = 0; i < fragment_count; ++i) { |
| 1622 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1623 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1624 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1625 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1626 | } |
| 1627 | |
| 1628 | /* |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 1629 | * Ensure the sender has write permissions if the memory needs to be |
| 1630 | * cleared. |
| 1631 | */ |
| 1632 | if ((sender_orig_mode & MM_MODE_W) == 0 && clear == true) { |
| 1633 | dlog_verbose( |
| 1634 | "Cannot zero memory when the sender does not have " |
| 1635 | "write access\n"); |
| 1636 | return ffa_error(FFA_DENIED); |
| 1637 | } |
| 1638 | |
| 1639 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1640 | * Check if the state transition is lawful for the recipient, and ensure |
| 1641 | * that all constituents of the memory region being retrieved are at the |
| 1642 | * same state. |
| 1643 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1644 | ret = ffa_retrieve_check_transition( |
| 1645 | to_locked, share_func, fragments, fragment_constituent_counts, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 1646 | fragment_count, sender_orig_mode, &to_mode, memory_protected, |
| 1647 | &map_action); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1648 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1649 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1650 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1651 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1652 | } |
| 1653 | |
| 1654 | /* |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1655 | * Create a local pool so any freed memory can't be used by |
| 1656 | * another thread. This is to ensure the original mapping can be |
| 1657 | * restored if the clear fails. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1658 | */ |
| 1659 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1660 | |
| 1661 | /* |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1662 | * Memory retrieves from the NWd VMs don't require update to S2 PTs on |
| 1663 | * retrieve request. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1664 | */ |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1665 | if (map_action != MAP_ACTION_NONE) { |
| 1666 | /* |
| 1667 | * First reserve all required memory for the new page table |
| 1668 | * entries in the recipient page tables without committing, to |
| 1669 | * make sure the entire operation will succeed without |
| 1670 | * exhausting the page pool. |
| 1671 | */ |
| 1672 | ret = ffa_region_group_identity_map( |
| 1673 | to_locked, fragments, fragment_constituent_counts, |
| 1674 | fragment_count, to_mode, page_pool, MAP_ACTION_CHECK, |
| 1675 | NULL); |
| 1676 | if (ret.func == FFA_ERROR_32) { |
| 1677 | /* TODO: partial defrag of failed range. */ |
| 1678 | goto out; |
| 1679 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | /* Clear the memory so no VM or device can see the previous contents. */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1683 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1684 | !ffa_clear_memory_constituents(sender_orig_mode, fragments, |
| 1685 | fragment_constituent_counts, |
| 1686 | fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1687 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1688 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1689 | goto out; |
| 1690 | } |
| 1691 | |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1692 | if (map_action != MAP_ACTION_NONE) { |
| 1693 | /* |
| 1694 | * Complete the transfer by mapping the memory into the |
| 1695 | * recipient. This won't allocate because the transaction was |
| 1696 | * already prepared above, so it doesn't need to use the |
| 1697 | * `local_page_pool`. |
| 1698 | */ |
| 1699 | CHECK(ffa_region_group_identity_map(to_locked, fragments, |
| 1700 | fragment_constituent_counts, |
| 1701 | fragment_count, to_mode, |
| 1702 | page_pool, map_action, NULL) |
| 1703 | .func == FFA_SUCCESS_32); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1704 | |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1705 | /* |
| 1706 | * Return the mode used in mapping the memory in retriever's PT. |
| 1707 | */ |
| 1708 | if (response_mode != NULL) { |
| 1709 | *response_mode = to_mode; |
| 1710 | } |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1711 | } |
| 1712 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1713 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1714 | |
| 1715 | out: |
| 1716 | mpool_fini(&local_page_pool); |
| 1717 | |
| 1718 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1719 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1720 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1721 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1722 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1723 | |
| 1724 | return ret; |
| 1725 | } |
| 1726 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1727 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1728 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1729 | struct ffa_memory_region_constituent **fragments, |
| 1730 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1731 | uint32_t sender_orig_mode, struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1732 | { |
| 1733 | uint32_t orig_from_mode; |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1734 | uint32_t clearing_mode; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1735 | uint32_t from_mode; |
| 1736 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1737 | struct ffa_value ret; |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1738 | enum ffa_map_action map_action; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1739 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1740 | ret = ffa_relinquish_check_transition( |
| 1741 | from_locked, &orig_from_mode, fragments, |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1742 | fragment_constituent_counts, fragment_count, &from_mode, |
| 1743 | &map_action); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1744 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1745 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1746 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1747 | } |
| 1748 | |
| 1749 | /* |
| 1750 | * Create a local pool so any freed memory can't be used by another |
| 1751 | * thread. This is to ensure the original mapping can be restored if the |
| 1752 | * clear fails. |
| 1753 | */ |
| 1754 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1755 | |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1756 | if (map_action != MAP_ACTION_NONE) { |
| 1757 | clearing_mode = orig_from_mode; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1758 | |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1759 | /* |
| 1760 | * First reserve all required memory for the new page table |
| 1761 | * entries without committing, to make sure the entire operation |
| 1762 | * will succeed without exhausting the page pool. |
| 1763 | */ |
| 1764 | ret = ffa_region_group_identity_map( |
| 1765 | from_locked, fragments, fragment_constituent_counts, |
| 1766 | fragment_count, from_mode, page_pool, MAP_ACTION_CHECK, |
| 1767 | NULL); |
| 1768 | if (ret.func == FFA_ERROR_32) { |
| 1769 | goto out; |
| 1770 | } |
| 1771 | |
| 1772 | /* |
| 1773 | * Update the mapping for the sender. This won't allocate |
| 1774 | * because the transaction was already prepared above, but may |
| 1775 | * free pages in the case that a whole block is being unmapped |
| 1776 | * that was previously partially mapped. |
| 1777 | */ |
| 1778 | CHECK(ffa_region_group_identity_map(from_locked, fragments, |
| 1779 | fragment_constituent_counts, |
| 1780 | fragment_count, from_mode, |
| 1781 | &local_page_pool, |
| 1782 | MAP_ACTION_COMMIT, NULL) |
| 1783 | .func == FFA_SUCCESS_32); |
| 1784 | } else { |
| 1785 | /* |
| 1786 | * If the `map_action` is set to `MAP_ACTION_NONE`, S2 PTs |
| 1787 | * were not updated on retrieve/relinquish. These were updating |
| 1788 | * only the `share_state` structures. As such, use the sender's |
| 1789 | * original mode. |
| 1790 | */ |
| 1791 | clearing_mode = sender_orig_mode; |
| 1792 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1793 | |
| 1794 | /* Clear the memory so no VM or device can see the previous contents. */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1795 | if (clear && |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1796 | !ffa_clear_memory_constituents(clearing_mode, fragments, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1797 | fragment_constituent_counts, |
| 1798 | fragment_count, page_pool)) { |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 1799 | if (map_action != MAP_ACTION_NONE) { |
| 1800 | /* |
| 1801 | * On failure, roll back by returning memory to the |
| 1802 | * sender. This may allocate pages which were previously |
| 1803 | * freed into `local_page_pool` by the call above, but |
| 1804 | * will never allocate more pages than that so can never |
| 1805 | * fail. |
| 1806 | */ |
| 1807 | CHECK(ffa_region_group_identity_map( |
| 1808 | from_locked, fragments, |
| 1809 | fragment_constituent_counts, |
| 1810 | fragment_count, orig_from_mode, |
| 1811 | &local_page_pool, MAP_ACTION_COMMIT, NULL) |
| 1812 | .func == FFA_SUCCESS_32); |
| 1813 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1814 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1815 | goto out; |
| 1816 | } |
| 1817 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1818 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1819 | |
| 1820 | out: |
| 1821 | mpool_fini(&local_page_pool); |
| 1822 | |
| 1823 | /* |
| 1824 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1825 | * error) or merging entries into blocks where possible (on success). |
| 1826 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1827 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1828 | |
| 1829 | return ret; |
| 1830 | } |
| 1831 | |
| 1832 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1833 | * Complete a memory sending operation by checking that it is valid, updating |
| 1834 | * the sender page table, and then either marking the share state as having |
| 1835 | * completed sending (on success) or freeing it (on failure). |
| 1836 | * |
| 1837 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1838 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1839 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1840 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1841 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1842 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1843 | { |
| 1844 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1845 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1846 | struct ffa_value ret; |
| 1847 | |
| 1848 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1849 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1850 | assert(memory_region != NULL); |
| 1851 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1852 | assert(composite != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1853 | |
| 1854 | /* Check that state is valid in sender page table and update. */ |
| 1855 | ret = ffa_send_check_update( |
| 1856 | from_locked, share_state->fragments, |
| 1857 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1858 | share_state->fragment_count, composite->page_count, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1859 | share_state->share_func, memory_region, page_pool, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1860 | orig_from_mode_ret, &share_state->memory_protected); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1861 | if (ret.func != FFA_SUCCESS_32) { |
| 1862 | /* |
| 1863 | * Free share state, it failed to send so it can't be retrieved. |
| 1864 | */ |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1865 | dlog_verbose("%s: failed to send check update: %s(%s)\n", |
| 1866 | __func__, ffa_func_name(ret.func), |
| 1867 | ffa_error_name(ffa_error_code(ret))); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1868 | share_state_free(share_states, share_state, page_pool); |
| 1869 | return ret; |
| 1870 | } |
| 1871 | |
| 1872 | share_state->sending_complete = true; |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1873 | dlog_verbose("%s: marked sending complete.\n", __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1874 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1875 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1876 | } |
| 1877 | |
| 1878 | /** |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1879 | * Check that the memory attributes match Hafnium expectations. |
| 1880 | * Cacheability: |
| 1881 | * - Normal Memory as `FFA_MEMORY_CACHE_WRITE_BACK`. |
| 1882 | * - Device memory as `FFA_MEMORY_DEV_NGNRNE`. |
| 1883 | * |
| 1884 | * Shareability: |
| 1885 | * - Inner Shareable. |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1886 | */ |
| 1887 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1888 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1889 | { |
| 1890 | enum ffa_memory_type memory_type; |
| 1891 | enum ffa_memory_cacheability cacheability; |
| 1892 | enum ffa_memory_shareability shareability; |
| 1893 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 1894 | memory_type = attributes.type; |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1895 | cacheability = attributes.cacheability; |
| 1896 | if (memory_type == FFA_MEMORY_NORMAL_MEM && |
| 1897 | cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1898 | dlog_verbose( |
| 1899 | "Normal Memory: Invalid cacheability %s, " |
| 1900 | "expected %s.\n", |
| 1901 | ffa_memory_cacheability_name(cacheability), |
| 1902 | ffa_memory_cacheability_name( |
| 1903 | FFA_MEMORY_CACHE_WRITE_BACK)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1904 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1905 | } |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1906 | if (memory_type == FFA_MEMORY_DEVICE_MEM && |
| 1907 | cacheability != FFA_MEMORY_DEV_NGNRNE) { |
| 1908 | dlog_verbose( |
| 1909 | "Device Memory: Invalid cacheability %s, " |
| 1910 | "expected %s.\n", |
| 1911 | ffa_device_memory_cacheability_name(cacheability), |
| 1912 | ffa_device_memory_cacheability_name( |
| 1913 | FFA_MEMORY_DEV_NGNRNE)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1914 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1915 | } |
| 1916 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 1917 | shareability = attributes.shareability; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1918 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 1919 | dlog_verbose("Invalid shareability %s, expected %s.\n", |
| 1920 | ffa_memory_shareability_name(shareability), |
| 1921 | ffa_memory_shareability_name( |
| 1922 | FFA_MEMORY_INNER_SHAREABLE)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1923 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1924 | } |
| 1925 | |
| 1926 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1927 | } |
| 1928 | |
| 1929 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1930 | * Check that the given `memory_region` represents a valid memory send request |
| 1931 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1932 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1933 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1934 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1935 | * not. |
| 1936 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1937 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1938 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1939 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1940 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1941 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1942 | struct ffa_composite_memory_region *composite; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1943 | struct ffa_memory_access *receiver = |
| 1944 | ffa_memory_region_get_receiver(memory_region, 0); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1945 | uint64_t receivers_end; |
| 1946 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1947 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1948 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1949 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1950 | enum ffa_data_access data_access; |
| 1951 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1952 | enum ffa_memory_security security_state; |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 1953 | enum ffa_memory_type type; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1954 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1955 | const size_t minimum_first_fragment_length = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1956 | memory_region->receivers_offset + |
| 1957 | memory_region->memory_access_desc_size + |
| 1958 | sizeof(struct ffa_composite_memory_region); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1959 | |
| 1960 | if (fragment_length < minimum_first_fragment_length) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1961 | dlog_verbose("Fragment length %u too short (min %zu).\n", |
| 1962 | fragment_length, minimum_first_fragment_length); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1963 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1964 | } |
| 1965 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1966 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1967 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1968 | if (!is_aligned(fragment_length, |
| 1969 | sizeof(struct ffa_memory_region_constituent)) || |
| 1970 | !is_aligned(memory_share_length, |
| 1971 | sizeof(struct ffa_memory_region_constituent))) { |
| 1972 | dlog_verbose( |
| 1973 | "Fragment length %u or total length %u" |
| 1974 | " is not 16-byte aligned.\n", |
| 1975 | fragment_length, memory_share_length); |
| 1976 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1977 | } |
| 1978 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1979 | if (fragment_length > memory_share_length) { |
| 1980 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1981 | "Fragment length %zu greater than total length %zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1982 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1983 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1984 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1985 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1986 | /* The sender must match the caller. */ |
| 1987 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1988 | vm_id_is_current_world(memory_region->sender)) || |
| 1989 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1990 | memory_region->sender != from_locked.vm->id)) { |
| 1991 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1992 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1993 | } |
| 1994 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1995 | if (memory_region->receiver_count <= 0) { |
| 1996 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1997 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1998 | } |
| 1999 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2000 | /* |
| 2001 | * Ensure that the composite header is within the memory bounds and |
| 2002 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 2003 | * to prevent overflow. |
| 2004 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2005 | receivers_end = ((uint64_t)memory_region->memory_access_desc_size * |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2006 | (uint64_t)memory_region->receiver_count) + |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 2007 | memory_region->receivers_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2008 | min_length = receivers_end + |
| 2009 | sizeof(struct ffa_composite_memory_region) + |
| 2010 | sizeof(struct ffa_memory_region_constituent); |
| 2011 | if (min_length > memory_share_length) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2012 | dlog_verbose("Share too short: got %zu but minimum is %zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2013 | (size_t)memory_share_length, (size_t)min_length); |
| 2014 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2015 | } |
| 2016 | |
| 2017 | composite_memory_region_offset = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2018 | receiver->composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2019 | |
| 2020 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2021 | * Check that the composite memory region descriptor is after the access |
| 2022 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 2023 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2024 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2025 | if ((composite_memory_region_offset < receivers_end) || |
| 2026 | (composite_memory_region_offset % 16 != 0) || |
| 2027 | (composite_memory_region_offset > |
| 2028 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 2029 | dlog_verbose( |
| 2030 | "Invalid composite memory region descriptor offset " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2031 | "%zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2032 | (size_t)composite_memory_region_offset); |
| 2033 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2034 | } |
| 2035 | |
| 2036 | /* |
| 2037 | * Compute the start of the constituent regions. Already checked |
| 2038 | * to be not more than fragment_length and thus not more than |
| 2039 | * memory_share_length. |
| 2040 | */ |
| 2041 | constituents_start = composite_memory_region_offset + |
| 2042 | sizeof(struct ffa_composite_memory_region); |
| 2043 | constituents_length = memory_share_length - constituents_start; |
| 2044 | |
| 2045 | /* |
| 2046 | * Check that the number of constituents is consistent with the length |
| 2047 | * of the constituent region. |
| 2048 | */ |
| 2049 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2050 | if ((constituents_length % |
| 2051 | sizeof(struct ffa_memory_region_constituent) != |
| 2052 | 0) || |
| 2053 | ((constituents_length / |
| 2054 | sizeof(struct ffa_memory_region_constituent)) != |
| 2055 | composite->constituent_count)) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2056 | dlog_verbose("Invalid length %zu or composite offset %zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 2057 | (size_t)memory_share_length, |
| 2058 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2059 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2060 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2061 | if (fragment_length < memory_share_length && |
| 2062 | fragment_length < HF_MAILBOX_SIZE) { |
| 2063 | dlog_warning( |
| 2064 | "Initial fragment length %d smaller than mailbox " |
| 2065 | "size.\n", |
| 2066 | fragment_length); |
| 2067 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2068 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2069 | /* |
| 2070 | * Clear is not allowed for memory sharing, as the sender still has |
| 2071 | * access to the memory. |
| 2072 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2073 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2074 | (share_func == FFA_MEM_SHARE_32 || |
| 2075 | share_func == FFA_MEM_SHARE_64)) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2076 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2077 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2078 | } |
| 2079 | |
| 2080 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2081 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2082 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2083 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2084 | } |
| 2085 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2086 | /* Check that the permissions are valid, for each specified receiver. */ |
| 2087 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2088 | struct ffa_memory_region_attributes receiver_permissions; |
| 2089 | |
| 2090 | receiver = ffa_memory_region_get_receiver(memory_region, i); |
| 2091 | assert(receiver != NULL); |
| 2092 | receiver_permissions = receiver->receiver_permissions; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2093 | ffa_memory_access_permissions_t permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2094 | receiver_permissions.permissions; |
| 2095 | ffa_id_t receiver_id = receiver_permissions.receiver; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2096 | |
| 2097 | if (memory_region->sender == receiver_id) { |
| 2098 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2099 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2100 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 2101 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2102 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 2103 | j++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2104 | struct ffa_memory_access *other_receiver = |
| 2105 | ffa_memory_region_get_receiver(memory_region, |
| 2106 | j); |
| 2107 | assert(other_receiver != NULL); |
| 2108 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2109 | if (receiver_id == |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2110 | other_receiver->receiver_permissions.receiver) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2111 | dlog_verbose( |
| 2112 | "Repeated receiver(%x) in memory send " |
| 2113 | "operation.\n", |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2114 | other_receiver->receiver_permissions |
| 2115 | .receiver); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2116 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2117 | } |
| 2118 | } |
| 2119 | |
| 2120 | if (composite_memory_region_offset != |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2121 | receiver->composite_memory_region_offset) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2122 | dlog_verbose( |
| 2123 | "All ffa_memory_access should point to the " |
| 2124 | "same composite memory region offset.\n"); |
| 2125 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2126 | } |
| 2127 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2128 | data_access = permissions.data_access; |
| 2129 | instruction_access = permissions.instruction_access; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2130 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 2131 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 2132 | dlog_verbose( |
| 2133 | "Reserved value for receiver permissions " |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2134 | "(data_access = %s, instruction_access = %s)\n", |
| 2135 | ffa_data_access_name(data_access), |
| 2136 | ffa_instruction_access_name( |
| 2137 | instruction_access)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2138 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2139 | } |
| 2140 | if (instruction_access != |
| 2141 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2142 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2143 | "Invalid instruction access permissions %s " |
| 2144 | "for sending memory, expected %s.\n", |
| 2145 | ffa_instruction_access_name(instruction_access), |
| 2146 | ffa_instruction_access_name( |
Daniel Boulby | 91052c3 | 2024-05-21 14:09:48 +0100 | [diff] [blame] | 2147 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2148 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2149 | } |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2150 | if (share_func == FFA_MEM_SHARE_32 || |
| 2151 | share_func == FFA_MEM_SHARE_64) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2152 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2153 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2154 | "Invalid data access permissions %s " |
| 2155 | "for sharing memory, expected %s.\n", |
| 2156 | ffa_data_access_name(data_access), |
| 2157 | ffa_data_access_name( |
| 2158 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2159 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2160 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2161 | /* |
| 2162 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 2163 | * spec, NX is required for share operations (but must |
| 2164 | * not be specified by the sender) so set it in the |
| 2165 | * copy that we store, ready to be returned to the |
| 2166 | * retriever. |
| 2167 | */ |
| 2168 | if (vm_id_is_current_world(receiver_id)) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2169 | permissions.instruction_access = |
| 2170 | FFA_INSTRUCTION_ACCESS_NX; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2171 | receiver_permissions.permissions = permissions; |
| 2172 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2173 | } |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2174 | if ((share_func == FFA_MEM_LEND_32 || |
| 2175 | share_func == FFA_MEM_LEND_64) && |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2176 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2177 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2178 | "Invalid data access permissions %s for " |
| 2179 | "lending memory, expected %s.\n", |
| 2180 | ffa_data_access_name(data_access), |
| 2181 | ffa_data_access_name( |
| 2182 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2183 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2184 | } |
| 2185 | |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2186 | if ((share_func == FFA_MEM_DONATE_32 || |
| 2187 | share_func == FFA_MEM_DONATE_64) && |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2188 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2189 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2190 | "Invalid data access permissions %s for " |
| 2191 | "donating memory, expected %s.\n", |
| 2192 | ffa_data_access_name(data_access), |
| 2193 | ffa_data_access_name( |
| 2194 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2195 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2196 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2197 | } |
| 2198 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2199 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2200 | security_state = memory_region->attributes.security; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2201 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2202 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2203 | "Invalid security state %s for memory share operation, " |
| 2204 | "expected %s.\n", |
| 2205 | ffa_memory_security_name(security_state), |
| 2206 | ffa_memory_security_name( |
| 2207 | FFA_MEMORY_SECURITY_UNSPECIFIED)); |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2208 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2209 | } |
| 2210 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2211 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2212 | * If a memory donate or lend with single borrower, the memory type |
| 2213 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2214 | */ |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2215 | type = memory_region->attributes.type; |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2216 | if (share_func == FFA_MEM_DONATE_32 || |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2217 | share_func == FFA_MEM_DONATE_64 || |
| 2218 | ((share_func == FFA_MEM_LEND_32 || share_func == FFA_MEM_LEND_64) && |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2219 | memory_region->receiver_count == 1)) { |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2220 | if (type != FFA_MEMORY_NOT_SPECIFIED_MEM) { |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2221 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2222 | "Invalid memory type %s for memory share " |
| 2223 | "operation, expected %s.\n", |
| 2224 | ffa_memory_type_name(type), |
| 2225 | ffa_memory_type_name( |
| 2226 | FFA_MEMORY_NOT_SPECIFIED_MEM)); |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2227 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2228 | } |
| 2229 | } else { |
| 2230 | /* |
| 2231 | * Check that sender's memory attributes match Hafnium |
| 2232 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 2233 | * Read-Allocate Write-Allocate Cacheable. |
| 2234 | */ |
| 2235 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 2236 | if (ret.func != FFA_SUCCESS_32) { |
| 2237 | return ret; |
| 2238 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2239 | } |
| 2240 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2241 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2242 | } |
| 2243 | |
| 2244 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2245 | * Gets the share state for continuing an operation to donate, lend or share |
| 2246 | * memory, and checks that it is a valid request. |
| 2247 | * |
| 2248 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 2249 | * not. |
| 2250 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2251 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2252 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2253 | struct ffa_memory_share_state **share_state_ret, ffa_id_t from_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2254 | struct mpool *page_pool) |
| 2255 | { |
| 2256 | struct ffa_memory_share_state *share_state; |
| 2257 | struct ffa_memory_region *memory_region; |
| 2258 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 2259 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2260 | |
| 2261 | /* |
| 2262 | * Look up the share state by handle and make sure that the VM ID |
| 2263 | * matches. |
| 2264 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 2265 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 2266 | if (share_state == NULL) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2267 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2268 | "Invalid handle %#lx for memory send continuation.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2269 | handle); |
| 2270 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2271 | } |
| 2272 | memory_region = share_state->memory_region; |
| 2273 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2274 | if (vm_id_is_current_world(from_vm_id) && |
| 2275 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2276 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 2277 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2278 | } |
| 2279 | |
| 2280 | if (share_state->sending_complete) { |
| 2281 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2282 | "Sending of memory handle %#lx is already complete.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2283 | handle); |
| 2284 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2285 | } |
| 2286 | |
| 2287 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 2288 | /* |
| 2289 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 2290 | * probably be increased. |
| 2291 | */ |
| 2292 | dlog_warning( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2293 | "Too many fragments for memory share with handle %#lx; " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2294 | "only %d supported.\n", |
| 2295 | handle, MAX_FRAGMENTS); |
| 2296 | /* Free share state, as it's not possible to complete it. */ |
| 2297 | share_state_free(share_states, share_state, page_pool); |
| 2298 | return ffa_error(FFA_NO_MEMORY); |
| 2299 | } |
| 2300 | |
| 2301 | *share_state_ret = share_state; |
| 2302 | |
| 2303 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2304 | } |
| 2305 | |
| 2306 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2307 | * Checks if there is at least one receiver from the other world. |
| 2308 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2309 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2310 | struct ffa_memory_region *memory_region) |
| 2311 | { |
| 2312 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2313 | struct ffa_memory_access *receiver = |
| 2314 | ffa_memory_region_get_receiver(memory_region, i); |
| 2315 | assert(receiver != NULL); |
| 2316 | ffa_id_t receiver_id = receiver->receiver_permissions.receiver; |
| 2317 | |
| 2318 | if (!vm_id_is_current_world(receiver_id)) { |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2319 | return true; |
| 2320 | } |
| 2321 | } |
| 2322 | return false; |
| 2323 | } |
| 2324 | |
| 2325 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 2326 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 2327 | * designated allocator of the memory handle. In practice, this also means |
| 2328 | * Hafnium is responsible for managing the state structures for the transaction. |
| 2329 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 2330 | * sender is an SP or there is at least one borrower that is an SP. |
| 2331 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 2332 | * operation involves only NWd VMs. |
| 2333 | * |
| 2334 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 2335 | * sender. Validation consists of checking if the message length and number of |
| 2336 | * memory region constituents match, and if the transition is valid for the |
| 2337 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 2338 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2339 | * Assumes that the caller has already found and locked the sender VM and copied |
| 2340 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 2341 | * allocated page from Hafnium's internal pool. The caller must have also |
| 2342 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2343 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2344 | * This function takes ownership of the `memory_region` passed in and will free |
| 2345 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2346 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2347 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2348 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2349 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2350 | uint32_t fragment_length, uint32_t share_func, |
| 2351 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2352 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2353 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2354 | struct share_states_locked share_states; |
| 2355 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2356 | |
| 2357 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2358 | * If there is an error validating the `memory_region` then we need to |
| 2359 | * free it because we own it but we won't be storing it in a share state |
| 2360 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2361 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2362 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 2363 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2364 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2365 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2366 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2367 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2368 | } |
| 2369 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2370 | /* Set flag for share function, ready to be retrieved later. */ |
| 2371 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2372 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2373 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2374 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2375 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2376 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2377 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2378 | case FFA_MEM_LEND_32: |
| 2379 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2380 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2381 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2382 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2383 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2384 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2385 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2386 | } |
| 2387 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2388 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2389 | /* |
| 2390 | * Allocate a share state before updating the page table. Otherwise if |
| 2391 | * updating the page table succeeded but allocating the share state |
| 2392 | * failed then it would leave the memory in a state where nobody could |
| 2393 | * get it back. |
| 2394 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 2395 | share_state = allocate_share_state(share_states, share_func, |
| 2396 | memory_region, fragment_length, |
| 2397 | FFA_MEMORY_HANDLE_INVALID); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 2398 | if (share_state == NULL) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2399 | dlog_verbose("Failed to allocate share state.\n"); |
| 2400 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2401 | ret = ffa_error(FFA_NO_MEMORY); |
| 2402 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2403 | } |
| 2404 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2405 | if (fragment_length == memory_share_length) { |
| 2406 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2407 | ret = ffa_memory_send_complete( |
| 2408 | from_locked, share_states, share_state, page_pool, |
| 2409 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2410 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2411 | /* |
| 2412 | * Use sender ID from 'memory_region' assuming |
| 2413 | * that at this point it has been validated: |
| 2414 | * - MBZ at virtual FF-A instance. |
| 2415 | */ |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2416 | ffa_id_t sender_to_ret = |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2417 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 2418 | ? memory_region->sender |
| 2419 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2420 | ret = (struct ffa_value){ |
| 2421 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 2422 | .arg1 = (uint32_t)memory_region->handle, |
| 2423 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2424 | .arg3 = fragment_length, |
| 2425 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2426 | } |
| 2427 | |
| 2428 | out: |
| 2429 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2430 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2431 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2432 | } |
| 2433 | |
| 2434 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2435 | * Continues an operation to donate, lend or share memory to a VM from current |
| 2436 | * world. If this is the last fragment then checks that the transition is valid |
| 2437 | * for the type of memory sending operation and updates the stage-2 page tables |
| 2438 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2439 | * |
| 2440 | * Assumes that the caller has already found and locked the sender VM and copied |
| 2441 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 2442 | * allocated page from Hafnium's internal pool. |
| 2443 | * |
| 2444 | * This function takes ownership of the `fragment` passed in; it must not be |
| 2445 | * freed by the caller. |
| 2446 | */ |
| 2447 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 2448 | void *fragment, |
| 2449 | uint32_t fragment_length, |
| 2450 | ffa_memory_handle_t handle, |
| 2451 | struct mpool *page_pool) |
| 2452 | { |
| 2453 | struct share_states_locked share_states = share_states_lock(); |
| 2454 | struct ffa_memory_share_state *share_state; |
| 2455 | struct ffa_value ret; |
| 2456 | struct ffa_memory_region *memory_region; |
| 2457 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 2458 | CHECK(is_aligned(fragment, |
| 2459 | alignof(struct ffa_memory_region_constituent))); |
| 2460 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 2461 | 0) { |
| 2462 | dlog_verbose("Fragment length %u misaligned.\n", |
| 2463 | fragment_length); |
| 2464 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2465 | goto out_free_fragment; |
| 2466 | } |
| 2467 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2468 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 2469 | &share_state, |
| 2470 | from_locked.vm->id, page_pool); |
| 2471 | if (ret.func != FFA_SUCCESS_32) { |
| 2472 | goto out_free_fragment; |
| 2473 | } |
| 2474 | memory_region = share_state->memory_region; |
| 2475 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2476 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2477 | dlog_error( |
| 2478 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2479 | "other world. This should never happen, and indicates " |
| 2480 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2481 | "EL3 code.\n"); |
| 2482 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2483 | goto out_free_fragment; |
| 2484 | } |
| 2485 | |
| 2486 | /* Add this fragment. */ |
| 2487 | share_state->fragments[share_state->fragment_count] = fragment; |
| 2488 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 2489 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 2490 | share_state->fragment_count++; |
| 2491 | |
| 2492 | /* Check whether the memory send operation is now ready to complete. */ |
| 2493 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2494 | ret = ffa_memory_send_complete( |
| 2495 | from_locked, share_states, share_state, page_pool, |
| 2496 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2497 | } else { |
| 2498 | ret = (struct ffa_value){ |
| 2499 | .func = FFA_MEM_FRAG_RX_32, |
| 2500 | .arg1 = (uint32_t)handle, |
| 2501 | .arg2 = (uint32_t)(handle >> 32), |
| 2502 | .arg3 = share_state_next_fragment_offset(share_states, |
| 2503 | share_state)}; |
| 2504 | } |
| 2505 | goto out; |
| 2506 | |
| 2507 | out_free_fragment: |
| 2508 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2509 | |
| 2510 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2511 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2512 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2513 | } |
| 2514 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2515 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 2516 | static void ffa_memory_retrieve_complete( |
| 2517 | struct share_states_locked share_states, |
| 2518 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 2519 | { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2520 | if (share_state->share_func == FFA_MEM_DONATE_32 || |
| 2521 | share_state->share_func == FFA_MEM_DONATE_64) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2522 | /* |
| 2523 | * Memory that has been donated can't be relinquished, |
| 2524 | * so no need to keep the share state around. |
| 2525 | */ |
| 2526 | share_state_free(share_states, share_state, page_pool); |
| 2527 | dlog_verbose("Freed share state for donate.\n"); |
| 2528 | } |
| 2529 | } |
| 2530 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2531 | /** |
| 2532 | * Initialises the given memory region descriptor to be used for an |
| 2533 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 2534 | * fragment. |
| 2535 | * The memory region descriptor is initialized according to retriever's |
| 2536 | * FF-A version. |
| 2537 | * |
| 2538 | * Returns true on success, or false if the given constituents won't all fit in |
| 2539 | * the first fragment. |
| 2540 | */ |
| 2541 | static bool ffa_retrieved_memory_region_init( |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2542 | void *response, enum ffa_version ffa_version, size_t response_max_size, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2543 | ffa_id_t sender, ffa_memory_attributes_t attributes, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2544 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2545 | ffa_memory_access_permissions_t permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2546 | struct ffa_memory_access *receivers, size_t receiver_count, |
| 2547 | uint32_t memory_access_desc_size, uint32_t page_count, |
| 2548 | uint32_t total_constituent_count, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2549 | const struct ffa_memory_region_constituent constituents[], |
| 2550 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 2551 | uint32_t *fragment_length) |
| 2552 | { |
| 2553 | struct ffa_composite_memory_region *composite_memory_region; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2554 | uint32_t i; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2555 | uint32_t composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2556 | uint32_t constituents_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2557 | |
| 2558 | assert(response != NULL); |
| 2559 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2560 | if (ffa_version == FFA_VERSION_1_0) { |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2561 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 2562 | (struct ffa_memory_region_v1_0 *)response; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2563 | struct ffa_memory_access_v1_0 *receiver; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2564 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2565 | ffa_memory_region_init_header_v1_0(retrieve_response, sender, |
| 2566 | attributes, flags, handle, 0, |
| 2567 | receiver_count); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2568 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2569 | receiver = (struct ffa_memory_access_v1_0 *) |
| 2570 | retrieve_response->receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2571 | receiver_count = retrieve_response->receiver_count; |
| 2572 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2573 | for (uint32_t i = 0; i < receiver_count; i++) { |
| 2574 | ffa_id_t receiver_id = |
| 2575 | receivers[i].receiver_permissions.receiver; |
| 2576 | ffa_memory_receiver_flags_t recv_flags = |
| 2577 | receivers[i].receiver_permissions.flags; |
| 2578 | |
| 2579 | /* |
| 2580 | * Initialized here as in memory retrieve responses we |
| 2581 | * currently expect one borrower to be specified. |
| 2582 | */ |
| 2583 | ffa_memory_access_init_v1_0( |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2584 | receiver, receiver_id, permissions.data_access, |
| 2585 | permissions.instruction_access, recv_flags); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2586 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2587 | |
| 2588 | composite_offset = |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2589 | sizeof(struct ffa_memory_region_v1_0) + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2590 | receiver_count * sizeof(struct ffa_memory_access_v1_0); |
| 2591 | receiver->composite_memory_region_offset = composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2592 | |
| 2593 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 2594 | retrieve_response, 0); |
| 2595 | } else { |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2596 | struct ffa_memory_region *retrieve_response = |
| 2597 | (struct ffa_memory_region *)response; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2598 | struct ffa_memory_access *retrieve_response_receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2599 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2600 | ffa_memory_region_init_header( |
| 2601 | retrieve_response, sender, attributes, flags, handle, 0, |
| 2602 | receiver_count, memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2603 | |
| 2604 | /* |
| 2605 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 2606 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 2607 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 2608 | * guaranteed that the offset we calculate here is aligned to a |
| 2609 | * 64-bit boundary and so 64-bit values can be copied without |
| 2610 | * alignment faults. |
| 2611 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2612 | composite_offset = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 2613 | retrieve_response->receivers_offset + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2614 | (uint32_t)(receiver_count * |
| 2615 | retrieve_response->memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2616 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2617 | retrieve_response_receivers = |
| 2618 | ffa_memory_region_get_receiver(retrieve_response, 0); |
| 2619 | assert(retrieve_response_receivers != NULL); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2620 | |
| 2621 | /* |
| 2622 | * Initialized here as in memory retrieve responses we currently |
| 2623 | * expect one borrower to be specified. |
| 2624 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2625 | memcpy_s(retrieve_response_receivers, |
| 2626 | sizeof(struct ffa_memory_access) * receiver_count, |
| 2627 | receivers, |
| 2628 | sizeof(struct ffa_memory_access) * receiver_count); |
| 2629 | |
| 2630 | retrieve_response_receivers->composite_memory_region_offset = |
| 2631 | composite_offset; |
| 2632 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2633 | composite_memory_region = |
| 2634 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 2635 | } |
| 2636 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2637 | assert(composite_memory_region != NULL); |
| 2638 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2639 | composite_memory_region->page_count = page_count; |
| 2640 | composite_memory_region->constituent_count = total_constituent_count; |
| 2641 | composite_memory_region->reserved_0 = 0; |
| 2642 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2643 | constituents_offset = |
| 2644 | composite_offset + sizeof(struct ffa_composite_memory_region); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2645 | if (constituents_offset + |
| 2646 | fragment_constituent_count * |
| 2647 | sizeof(struct ffa_memory_region_constituent) > |
| 2648 | response_max_size) { |
| 2649 | return false; |
| 2650 | } |
| 2651 | |
| 2652 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 2653 | composite_memory_region->constituents[i] = constituents[i]; |
| 2654 | } |
| 2655 | |
| 2656 | if (total_length != NULL) { |
| 2657 | *total_length = |
| 2658 | constituents_offset + |
| 2659 | composite_memory_region->constituent_count * |
| 2660 | sizeof(struct ffa_memory_region_constituent); |
| 2661 | } |
| 2662 | if (fragment_length != NULL) { |
| 2663 | *fragment_length = |
| 2664 | constituents_offset + |
| 2665 | fragment_constituent_count * |
| 2666 | sizeof(struct ffa_memory_region_constituent); |
| 2667 | } |
| 2668 | |
| 2669 | return true; |
| 2670 | } |
| 2671 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2672 | /** |
| 2673 | * Validates the retrieved permissions against those specified by the lender |
| 2674 | * of memory share operation. Optionally can help set the permissions to be used |
| 2675 | * for the S2 mapping, through the `permissions` argument. |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2676 | * Returns FFA_SUCCESS if all the fields are valid. FFA_ERROR, with error code: |
| 2677 | * - FFA_INVALID_PARAMETERS -> if the fields have invalid values as per the |
| 2678 | * specification for each ABI. |
| 2679 | * - FFA_DENIED -> if the permissions specified by the retriever are not |
| 2680 | * less permissive than those provided by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2681 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2682 | static struct ffa_value ffa_memory_retrieve_is_memory_access_valid( |
| 2683 | uint32_t share_func, enum ffa_data_access sent_data_access, |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2684 | enum ffa_data_access requested_data_access, |
| 2685 | enum ffa_instruction_access sent_instruction_access, |
| 2686 | enum ffa_instruction_access requested_instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2687 | ffa_memory_access_permissions_t *permissions, bool multiple_borrowers) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2688 | { |
| 2689 | switch (sent_data_access) { |
| 2690 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2691 | case FFA_DATA_ACCESS_RW: |
| 2692 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2693 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2694 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2695 | permissions->data_access = FFA_DATA_ACCESS_RW; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2696 | } |
| 2697 | break; |
| 2698 | } |
| 2699 | /* Intentional fall-through. */ |
| 2700 | case FFA_DATA_ACCESS_RO: |
| 2701 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2702 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2703 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2704 | permissions->data_access = FFA_DATA_ACCESS_RO; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2705 | } |
| 2706 | break; |
| 2707 | } |
| 2708 | dlog_verbose( |
| 2709 | "Invalid data access requested; sender specified " |
| 2710 | "permissions %#x but receiver requested %#x.\n", |
| 2711 | sent_data_access, requested_data_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2712 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2713 | case FFA_DATA_ACCESS_RESERVED: |
| 2714 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 2715 | "checked before this point."); |
| 2716 | } |
| 2717 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2718 | /* |
| 2719 | * For operations with a single borrower, If it is an FFA_MEMORY_LEND |
| 2720 | * or FFA_MEMORY_DONATE the retriever should have specifed the |
| 2721 | * instruction permissions it wishes to receive. |
| 2722 | */ |
| 2723 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2724 | case FFA_MEM_SHARE_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2725 | case FFA_MEM_SHARE_32: |
| 2726 | if (requested_instruction_access != |
| 2727 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2728 | dlog_verbose( |
| 2729 | "%s: for share instruction permissions must " |
| 2730 | "NOT be specified.\n", |
| 2731 | __func__); |
| 2732 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2733 | } |
| 2734 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2735 | case FFA_MEM_LEND_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2736 | case FFA_MEM_LEND_32: |
| 2737 | /* |
| 2738 | * For operations with multiple borrowers only permit XN |
| 2739 | * permissions, and both Sender and borrower should have used |
| 2740 | * FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED. |
| 2741 | */ |
| 2742 | if (multiple_borrowers) { |
| 2743 | if (requested_instruction_access != |
| 2744 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2745 | dlog_verbose( |
| 2746 | "%s: lend/share/donate with multiple " |
| 2747 | "borrowers " |
| 2748 | "instruction permissions must NOT be " |
| 2749 | "specified.\n", |
| 2750 | __func__); |
| 2751 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2752 | } |
| 2753 | break; |
| 2754 | } |
| 2755 | /* Fall through if the operation targets a single borrower. */ |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2756 | case FFA_MEM_DONATE_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2757 | case FFA_MEM_DONATE_32: |
| 2758 | if (!multiple_borrowers && |
| 2759 | requested_instruction_access == |
| 2760 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2761 | dlog_verbose( |
| 2762 | "%s: for lend/donate with single borrower " |
| 2763 | "instruction permissions must be speficified " |
| 2764 | "by borrower\n", |
| 2765 | __func__); |
| 2766 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2767 | } |
| 2768 | break; |
| 2769 | default: |
| 2770 | panic("%s: Wrong func id provided.\n", __func__); |
| 2771 | } |
| 2772 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2773 | switch (sent_instruction_access) { |
| 2774 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2775 | case FFA_INSTRUCTION_ACCESS_X: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2776 | if (requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2777 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2778 | permissions->instruction_access = |
| 2779 | FFA_INSTRUCTION_ACCESS_X; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2780 | } |
| 2781 | break; |
| 2782 | } |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2783 | /* |
| 2784 | * Fall through if requested permissions are less |
| 2785 | * permissive than those provided by the sender. |
| 2786 | */ |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2787 | case FFA_INSTRUCTION_ACCESS_NX: |
| 2788 | if (requested_instruction_access == |
| 2789 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2790 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2791 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2792 | permissions->instruction_access = |
| 2793 | FFA_INSTRUCTION_ACCESS_NX; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2794 | } |
| 2795 | break; |
| 2796 | } |
| 2797 | dlog_verbose( |
| 2798 | "Invalid instruction access requested; sender " |
| 2799 | "specified permissions %#x but receiver requested " |
| 2800 | "%#x.\n", |
| 2801 | sent_instruction_access, requested_instruction_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2802 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2803 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2804 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 2805 | "be checked before this point."); |
| 2806 | } |
| 2807 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2808 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2809 | } |
| 2810 | |
| 2811 | /** |
| 2812 | * Validate the receivers' permissions in the retrieve request against those |
| 2813 | * specified by the lender. |
| 2814 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 2815 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2816 | * The function looks into the flag to bypass multiple borrower checks: |
| 2817 | * - If not set returns FFA_SUCCESS if all specified permissions are valid. |
| 2818 | * - If set returns FFA_SUCCESS if the descriptor contains the permissions |
| 2819 | * to the caller of FFA_MEM_RETRIEVE_REQ and they are valid. Other permissions |
| 2820 | * are ignored, if provided. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2821 | */ |
| 2822 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 2823 | struct ffa_memory_region *memory_region, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2824 | struct ffa_memory_region *retrieve_request, ffa_id_t to_vm_id, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2825 | ffa_memory_access_permissions_t *permissions, |
| 2826 | struct ffa_memory_access **receiver_ret, uint32_t func_id) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2827 | { |
| 2828 | uint32_t retrieve_receiver_index; |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2829 | bool bypass_multi_receiver_check = |
| 2830 | (retrieve_request->flags & |
| 2831 | FFA_MEMORY_REGION_FLAG_BYPASS_BORROWERS_CHECK) != 0U; |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2832 | const uint32_t region_receiver_count = memory_region->receiver_count; |
| 2833 | struct ffa_value ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2834 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2835 | assert(receiver_ret != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2836 | assert(permissions != NULL); |
| 2837 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2838 | *permissions = (ffa_memory_access_permissions_t){0}; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2839 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2840 | if (!bypass_multi_receiver_check) { |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2841 | if (retrieve_request->receiver_count != region_receiver_count) { |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2842 | dlog_verbose( |
| 2843 | "Retrieve request should contain same list of " |
| 2844 | "borrowers, as specified by the lender.\n"); |
| 2845 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2846 | } |
| 2847 | } else { |
| 2848 | if (retrieve_request->receiver_count != 1) { |
| 2849 | dlog_verbose( |
| 2850 | "Set bypass multiple borrower check, receiver " |
| 2851 | "list must be sized 1 (%x)\n", |
| 2852 | memory_region->receiver_count); |
| 2853 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2854 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2855 | } |
| 2856 | |
| 2857 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2858 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2859 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2860 | ffa_memory_access_permissions_t sent_permissions; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2861 | struct ffa_memory_access *retrieve_request_receiver = |
| 2862 | ffa_memory_region_get_receiver(retrieve_request, i); |
| 2863 | assert(retrieve_request_receiver != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2864 | ffa_memory_access_permissions_t requested_permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2865 | retrieve_request_receiver->receiver_permissions |
| 2866 | .permissions; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2867 | ffa_id_t current_receiver_id = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2868 | retrieve_request_receiver->receiver_permissions |
| 2869 | .receiver; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2870 | struct ffa_memory_access *receiver; |
| 2871 | uint32_t mem_region_receiver_index; |
| 2872 | bool permissions_RO; |
| 2873 | bool clear_memory_flags; |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 2874 | /* |
| 2875 | * If the call is at the virtual FF-A instance the caller's |
| 2876 | * ID must match an entry in the memory access list. |
| 2877 | * In the SPMC, one of the specified receivers could be from |
| 2878 | * the NWd. |
| 2879 | */ |
| 2880 | bool found_to_id = vm_id_is_current_world(to_vm_id) |
| 2881 | ? (current_receiver_id == to_vm_id) |
| 2882 | : (!vm_id_is_current_world( |
| 2883 | current_receiver_id)); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2884 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2885 | if (bypass_multi_receiver_check && !found_to_id) { |
| 2886 | dlog_verbose( |
| 2887 | "Bypass multiple borrower check for id %x.\n", |
| 2888 | current_receiver_id); |
| 2889 | continue; |
| 2890 | } |
| 2891 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2892 | if (retrieve_request_receiver->composite_memory_region_offset != |
| 2893 | 0U) { |
| 2894 | dlog_verbose( |
| 2895 | "Retriever specified address ranges not " |
| 2896 | "supported (got offset %d).\n", |
| 2897 | retrieve_request_receiver |
| 2898 | ->composite_memory_region_offset); |
| 2899 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2900 | } |
| 2901 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2902 | /* |
| 2903 | * Find the current receiver in the transaction descriptor from |
| 2904 | * sender. |
| 2905 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2906 | mem_region_receiver_index = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2907 | ffa_memory_region_get_receiver_index( |
| 2908 | memory_region, current_receiver_id); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2909 | |
| 2910 | if (mem_region_receiver_index == |
| 2911 | memory_region->receiver_count) { |
| 2912 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2913 | current_receiver_id); |
| 2914 | return ffa_error(FFA_DENIED); |
| 2915 | } |
| 2916 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2917 | receiver = ffa_memory_region_get_receiver( |
| 2918 | memory_region, mem_region_receiver_index); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2919 | assert(receiver != NULL); |
| 2920 | |
| 2921 | sent_permissions = receiver->receiver_permissions.permissions; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2922 | |
| 2923 | if (found_to_id) { |
| 2924 | retrieve_receiver_index = i; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2925 | |
| 2926 | *receiver_ret = receiver; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2927 | } |
| 2928 | |
| 2929 | /* |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2930 | * Check if retrieve request memory access list is valid: |
| 2931 | * - The retrieve request complies with the specification. |
| 2932 | * - Permissions are within those specified by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2933 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2934 | ret = ffa_memory_retrieve_is_memory_access_valid( |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2935 | func_id, sent_permissions.data_access, |
| 2936 | requested_permissions.data_access, |
| 2937 | sent_permissions.instruction_access, |
| 2938 | requested_permissions.instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2939 | found_to_id ? permissions : NULL, |
| 2940 | region_receiver_count > 1); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2941 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2942 | if (ret.func != FFA_SUCCESS_32) { |
| 2943 | return ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2944 | } |
| 2945 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2946 | permissions_RO = |
| 2947 | (permissions->data_access == FFA_DATA_ACCESS_RO); |
J-Alves | e526237 | 2024-03-27 11:02:03 +0000 | [diff] [blame] | 2948 | clear_memory_flags = |
| 2949 | (retrieve_request->flags & |
| 2950 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2951 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2952 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2953 | /* |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2954 | * Can't request PM to clear memory if only provided |
| 2955 | * with RO permissions. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2956 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2957 | if (found_to_id && permissions_RO && clear_memory_flags) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2958 | dlog_verbose( |
| 2959 | "Receiver has RO permissions can not request " |
| 2960 | "clear.\n"); |
| 2961 | return ffa_error(FFA_DENIED); |
| 2962 | } |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2963 | |
| 2964 | /* |
| 2965 | * Check the impdef in the retrieve_request matches the value in |
| 2966 | * the original memory send. |
| 2967 | */ |
| 2968 | if (ffa_version_from_memory_access_desc_size( |
| 2969 | memory_region->memory_access_desc_size) >= |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2970 | FFA_VERSION_1_2 && |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2971 | ffa_version_from_memory_access_desc_size( |
| 2972 | retrieve_request->memory_access_desc_size) >= |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2973 | FFA_VERSION_1_2) { |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2974 | if (receiver->impdef.val[0] != |
| 2975 | retrieve_request_receiver->impdef.val[0] || |
| 2976 | receiver->impdef.val[1] != |
| 2977 | retrieve_request_receiver->impdef.val[1]) { |
| 2978 | dlog_verbose( |
| 2979 | "Impdef value in memory send does not " |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 2980 | "match retrieve request value send " |
| 2981 | "value %#lx %#lx retrieve request " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2982 | "value %#lx %#lx\n", |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2983 | receiver->impdef.val[0], |
| 2984 | receiver->impdef.val[1], |
| 2985 | retrieve_request_receiver->impdef |
| 2986 | .val[0], |
| 2987 | retrieve_request_receiver->impdef |
| 2988 | .val[1]); |
| 2989 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2990 | } |
| 2991 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2992 | } |
| 2993 | |
| 2994 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2995 | dlog_verbose( |
| 2996 | "Retrieve request does not contain caller's (%x) " |
| 2997 | "permissions\n", |
| 2998 | to_vm_id); |
| 2999 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3000 | } |
| 3001 | |
| 3002 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 3003 | } |
| 3004 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3005 | /* |
| 3006 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 3007 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 3008 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 3009 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 3010 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 3011 | * exception of the sender ID and handle. |
| 3012 | */ |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3013 | bool is_ffa_hypervisor_retrieve_request(struct ffa_memory_region *request, |
| 3014 | struct vm_locked to_locked) |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3015 | { |
| 3016 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3017 | request->attributes.shareability == 0U && |
| 3018 | request->attributes.cacheability == 0U && |
| 3019 | request->attributes.type == 0U && |
| 3020 | request->attributes.security == 0U && request->flags == 0U && |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3021 | request->tag == 0U && request->receiver_count == 0U && |
| 3022 | plat_ffa_memory_handle_allocated_by_current_world( |
| 3023 | request->handle); |
| 3024 | } |
| 3025 | |
| 3026 | /* |
| 3027 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 3028 | */ |
| 3029 | static void ffa_memory_retrieve_complete_from_hyp( |
| 3030 | struct ffa_memory_share_state *share_state) |
| 3031 | { |
| 3032 | if (share_state->hypervisor_fragment_count == |
| 3033 | share_state->fragment_count) { |
| 3034 | share_state->hypervisor_fragment_count = 0; |
| 3035 | } |
| 3036 | } |
| 3037 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3038 | /** |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3039 | * Prepares the return of the ffa_value for the memory retrieve response. |
| 3040 | */ |
| 3041 | static struct ffa_value ffa_memory_retrieve_resp(uint32_t total_length, |
| 3042 | uint32_t fragment_length) |
| 3043 | { |
| 3044 | return (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
| 3045 | .arg1 = total_length, |
| 3046 | .arg2 = fragment_length}; |
| 3047 | } |
| 3048 | |
| 3049 | /** |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3050 | * Validate that the memory region descriptor provided by the borrower on |
| 3051 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 3052 | * memory sharing call. |
| 3053 | */ |
| 3054 | static struct ffa_value ffa_memory_retrieve_validate( |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3055 | ffa_id_t to_id, struct ffa_memory_region *retrieve_request, |
| 3056 | uint32_t retrieve_request_length, |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3057 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 3058 | uint32_t share_func) |
| 3059 | { |
| 3060 | ffa_memory_region_flags_t transaction_type = |
| 3061 | retrieve_request->flags & |
| 3062 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3063 | enum ffa_memory_security security_state; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3064 | const uint64_t memory_access_desc_size = |
| 3065 | retrieve_request->memory_access_desc_size; |
| 3066 | const uint32_t expected_retrieve_request_length = |
| 3067 | retrieve_request->receivers_offset + |
| 3068 | (uint32_t)(retrieve_request->receiver_count * |
| 3069 | memory_access_desc_size); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3070 | |
| 3071 | assert(retrieve_request != NULL); |
| 3072 | assert(memory_region != NULL); |
| 3073 | assert(receiver_index != NULL); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3074 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3075 | if (retrieve_request_length != expected_retrieve_request_length) { |
| 3076 | dlog_verbose( |
| 3077 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
| 3078 | "but was %d.\n", |
| 3079 | expected_retrieve_request_length, |
| 3080 | retrieve_request_length); |
| 3081 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3082 | } |
| 3083 | |
| 3084 | if (retrieve_request->sender != memory_region->sender) { |
| 3085 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3086 | "Memory with handle %#lx not fully sent, can't " |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3087 | "retrieve.\n", |
| 3088 | memory_region->handle); |
| 3089 | return ffa_error(FFA_DENIED); |
| 3090 | } |
| 3091 | |
| 3092 | /* |
| 3093 | * The SPMC can only process retrieve requests to memory share |
| 3094 | * operations with one borrower from the other world. It can't |
| 3095 | * determine the ID of the NWd VM that invoked the retrieve |
| 3096 | * request interface call. It relies on the hypervisor to |
| 3097 | * validate the caller's ID against that provided in the |
| 3098 | * `receivers` list of the retrieve response. |
| 3099 | * In case there is only one borrower from the NWd in the |
| 3100 | * transaction descriptor, record that in the `receiver_id` for |
| 3101 | * later use, and validate in the retrieve request message. |
| 3102 | * This limitation is due to the fact SPMC can't determine the |
| 3103 | * index in the memory share structures state to update. |
| 3104 | */ |
| 3105 | if (to_id == HF_HYPERVISOR_VM_ID) { |
| 3106 | uint32_t other_world_count = 0; |
| 3107 | |
| 3108 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3109 | struct ffa_memory_access *receiver = |
| 3110 | ffa_memory_region_get_receiver(retrieve_request, |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3111 | i); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3112 | assert(receiver != NULL); |
| 3113 | |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3114 | if (!vm_id_is_current_world( |
| 3115 | receiver->receiver_permissions.receiver)) { |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3116 | other_world_count++; |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3117 | /* Set it to be used later. */ |
| 3118 | to_id = receiver->receiver_permissions.receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3119 | } |
| 3120 | } |
| 3121 | |
| 3122 | if (other_world_count > 1) { |
| 3123 | dlog_verbose( |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 3124 | "Support one receiver from the other world.\n"); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3125 | return ffa_error(FFA_NOT_SUPPORTED); |
| 3126 | } |
| 3127 | } |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3128 | /* |
| 3129 | * Check that the transaction type expected by the receiver is |
| 3130 | * correct, if it has been specified. |
| 3131 | */ |
| 3132 | if (transaction_type != |
| 3133 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 3134 | transaction_type != (memory_region->flags & |
| 3135 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 3136 | dlog_verbose( |
| 3137 | "Incorrect transaction type %#x for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3138 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#lx.\n", |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3139 | transaction_type, |
| 3140 | memory_region->flags & |
| 3141 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 3142 | retrieve_request->handle); |
| 3143 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3144 | } |
| 3145 | |
| 3146 | if (retrieve_request->tag != memory_region->tag) { |
| 3147 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3148 | "Incorrect tag %lu for FFA_MEM_RETRIEVE_REQ, expected " |
| 3149 | "%lu for handle %#lx.\n", |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3150 | retrieve_request->tag, memory_region->tag, |
| 3151 | retrieve_request->handle); |
| 3152 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3153 | } |
| 3154 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3155 | *receiver_index = |
| 3156 | ffa_memory_region_get_receiver_index(memory_region, to_id); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3157 | |
| 3158 | if (*receiver_index == memory_region->receiver_count) { |
| 3159 | dlog_verbose( |
| 3160 | "Incorrect receiver VM ID %d for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3161 | "FFA_MEM_RETRIEVE_REQ, for handle %#lx.\n", |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3162 | to_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3163 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3164 | } |
| 3165 | |
| 3166 | if ((retrieve_request->flags & |
| 3167 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 3168 | dlog_verbose( |
| 3169 | "Retriever specified 'address range alignment 'hint' " |
| 3170 | "not supported.\n"); |
| 3171 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3172 | } |
| 3173 | if ((retrieve_request->flags & |
| 3174 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 3175 | dlog_verbose( |
| 3176 | "Bits 8-5 must be zero in memory region's flags " |
| 3177 | "(address range alignment hint not supported).\n"); |
| 3178 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3179 | } |
| 3180 | |
| 3181 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 3182 | dlog_verbose( |
| 3183 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 3184 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3185 | } |
| 3186 | |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 3187 | if ((share_func == FFA_MEM_SHARE_32 || |
| 3188 | share_func == FFA_MEM_SHARE_64) && |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3189 | (retrieve_request->flags & |
| 3190 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 3191 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 3192 | dlog_verbose( |
| 3193 | "Memory Share operation can't clean after relinquish " |
| 3194 | "memory region.\n"); |
| 3195 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3196 | } |
| 3197 | |
| 3198 | /* |
| 3199 | * If the borrower needs the memory to be cleared before mapping |
| 3200 | * to its address space, the sender should have set the flag |
| 3201 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 3202 | * FFA_DENIED. |
| 3203 | */ |
| 3204 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 3205 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 3206 | dlog_verbose( |
| 3207 | "Borrower needs memory cleared. Sender needs to set " |
| 3208 | "flag for clearing memory.\n"); |
| 3209 | return ffa_error(FFA_DENIED); |
| 3210 | } |
| 3211 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3212 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3213 | security_state = retrieve_request->attributes.security; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3214 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 3215 | dlog_verbose( |
| 3216 | "Invalid security state for memory retrieve request " |
| 3217 | "operation.\n"); |
| 3218 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3219 | } |
| 3220 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3221 | /* |
| 3222 | * If memory type is not specified, bypass validation of memory |
| 3223 | * attributes in the retrieve request. The retriever is expecting to |
| 3224 | * obtain this information from the SPMC. |
| 3225 | */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3226 | if (retrieve_request->attributes.type == FFA_MEMORY_NOT_SPECIFIED_MEM) { |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3227 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 3228 | } |
| 3229 | |
| 3230 | /* |
| 3231 | * Ensure receiver's attributes are compatible with how |
| 3232 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 3233 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 3234 | */ |
| 3235 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 3236 | } |
| 3237 | |
J-Alves | 3f6527c | 2024-04-25 17:10:57 +0100 | [diff] [blame] | 3238 | /** |
| 3239 | * Whilst processing the retrieve request, the operation could be aborted, and |
| 3240 | * changes to page tables and the share state structures need to be reverted. |
| 3241 | */ |
| 3242 | static void ffa_partition_memory_retrieve_request_undo( |
| 3243 | struct vm_locked from_locked, |
| 3244 | struct ffa_memory_share_state *share_state, uint32_t receiver_index) |
| 3245 | { |
| 3246 | /* |
| 3247 | * Currently this operation is expected for operations involving the |
| 3248 | * 'other_world' vm. |
| 3249 | */ |
| 3250 | assert(from_locked.vm->id == HF_OTHER_WORLD_ID); |
| 3251 | assert(share_state->retrieved_fragment_count[receiver_index] > 0); |
| 3252 | |
| 3253 | /* Decrement the retrieved fragment count for the given receiver. */ |
| 3254 | share_state->retrieved_fragment_count[receiver_index]--; |
| 3255 | } |
| 3256 | |
| 3257 | /** |
| 3258 | * Whilst processing an hypervisor retrieve request the operation could be |
| 3259 | * aborted. There were no updates to PTs in this case, so decrementing the |
| 3260 | * fragment count retrieved by the hypervisor should be enough. |
| 3261 | */ |
| 3262 | static void ffa_hypervisor_memory_retrieve_request_undo( |
| 3263 | struct ffa_memory_share_state *share_state) |
| 3264 | { |
| 3265 | assert(share_state->hypervisor_fragment_count > 0); |
| 3266 | share_state->hypervisor_fragment_count--; |
| 3267 | } |
| 3268 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3269 | static struct ffa_value ffa_partition_retrieve_request( |
| 3270 | struct share_states_locked share_states, |
| 3271 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 3272 | struct ffa_memory_region *retrieve_request, |
| 3273 | uint32_t retrieve_request_length, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3274 | { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3275 | ffa_memory_access_permissions_t permissions = {0}; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 3276 | uint32_t memory_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3277 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3278 | struct ffa_composite_memory_region *composite; |
| 3279 | uint32_t total_length; |
| 3280 | uint32_t fragment_length; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 3281 | ffa_id_t receiver_id = to_locked.vm->id; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3282 | bool is_retrieve_complete = false; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3283 | const uint64_t memory_access_desc_size = |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 3284 | retrieve_request->memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3285 | uint32_t receiver_index; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3286 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3287 | ffa_memory_handle_t handle = retrieve_request->handle; |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3288 | ffa_memory_attributes_t attributes = {0}; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3289 | uint32_t retrieve_mode = 0; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3290 | struct ffa_memory_region *memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3291 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3292 | if (!share_state->sending_complete) { |
| 3293 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3294 | "Memory with handle %#lx not fully sent, can't " |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3295 | "retrieve.\n", |
| 3296 | handle); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3297 | return ffa_error(FFA_INVALID_PARAMETERS); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3298 | } |
| 3299 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3300 | /* |
| 3301 | * Validate retrieve request, according to what was sent by the |
| 3302 | * sender. Function will output the `receiver_index` from the |
| 3303 | * provided memory region. |
| 3304 | */ |
| 3305 | ret = ffa_memory_retrieve_validate( |
| 3306 | receiver_id, retrieve_request, retrieve_request_length, |
| 3307 | memory_region, &receiver_index, share_state->share_func); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3308 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3309 | if (ret.func != FFA_SUCCESS_32) { |
| 3310 | return ret; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3311 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3312 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3313 | /* |
| 3314 | * Validate the requested permissions against the sent |
| 3315 | * permissions. |
| 3316 | * Outputs the permissions to give to retriever at S2 |
| 3317 | * PTs. |
| 3318 | */ |
| 3319 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 3320 | memory_region, retrieve_request, receiver_id, &permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3321 | &receiver, share_state->share_func); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3322 | if (ret.func != FFA_SUCCESS_32) { |
| 3323 | return ret; |
| 3324 | } |
| 3325 | |
| 3326 | memory_to_mode = ffa_memory_permissions_to_mode( |
| 3327 | permissions, share_state->sender_orig_mode); |
| 3328 | |
Daniel Boulby | 6e26136 | 2024-06-13 16:53:00 +0100 | [diff] [blame^] | 3329 | /* |
| 3330 | * Check requested memory type is valid with the memory type of the |
| 3331 | * owner. E.g. they follow the memory type precedence where Normal |
| 3332 | * memory is more permissive than device and therefore device memory |
| 3333 | * can only be shared as device memory. |
| 3334 | */ |
| 3335 | if (retrieve_request->attributes.type == FFA_MEMORY_NORMAL_MEM && |
| 3336 | ((share_state->sender_orig_mode & MM_MODE_D) != 0U || |
| 3337 | memory_region->attributes.type == FFA_MEMORY_DEVICE_MEM)) { |
| 3338 | dlog_verbose( |
| 3339 | "Retrieving device memory as Normal memory is not " |
| 3340 | "allowed\n"); |
| 3341 | return ffa_error(FFA_DENIED); |
| 3342 | } |
| 3343 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3344 | ret = ffa_retrieve_check_update( |
| 3345 | to_locked, share_state->fragments, |
| 3346 | share_state->fragment_constituent_counts, |
| 3347 | share_state->fragment_count, memory_to_mode, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3348 | share_state->share_func, false, page_pool, &retrieve_mode, |
| 3349 | share_state->memory_protected); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3350 | |
| 3351 | if (ret.func != FFA_SUCCESS_32) { |
| 3352 | return ret; |
| 3353 | } |
| 3354 | |
| 3355 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 3356 | |
| 3357 | is_retrieve_complete = |
| 3358 | share_state->retrieved_fragment_count[receiver_index] == |
| 3359 | share_state->fragment_count; |
| 3360 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 3361 | /* VMs acquire the RX buffer from SPMC. */ |
| 3362 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 3363 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3364 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3365 | * Copy response to RX buffer of caller and deliver the message. |
| 3366 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3367 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3368 | composite = ffa_memory_region_get_composite(memory_region, 0); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3369 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3370 | /* |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3371 | * Set the security state in the memory retrieve response attributes |
| 3372 | * if specified by the target mode. |
| 3373 | */ |
| 3374 | attributes = plat_ffa_memory_security_mode(memory_region->attributes, |
| 3375 | retrieve_mode); |
| 3376 | |
| 3377 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3378 | * Constituents which we received in the first fragment should |
| 3379 | * always fit in the first fragment we are sending, because the |
| 3380 | * header is the same size in both cases and we have a fixed |
| 3381 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 3382 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3383 | */ |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 3384 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3385 | /* Provide the permissions that had been provided. */ |
| 3386 | receiver->receiver_permissions.permissions = permissions; |
| 3387 | |
| 3388 | /* |
| 3389 | * Prepare the memory region descriptor for the retrieve response. |
| 3390 | * Provide the pointer to the receiver tracked in the share state |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3391 | * structures. |
| 3392 | * At this point the retrieve request descriptor from the partition |
| 3393 | * has been processed. The `retrieve_request` is expected to be in |
| 3394 | * a region that is handled by the SPMC/Hyp. Reuse the same buffer to |
| 3395 | * prepare the retrieve response before copying it to the RX buffer of |
| 3396 | * the caller. |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3397 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3398 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3399 | retrieve_request, to_locked.vm->ffa_version, HF_MAILBOX_SIZE, |
| 3400 | memory_region->sender, attributes, memory_region->flags, handle, |
| 3401 | permissions, receiver, 1, memory_access_desc_size, |
| 3402 | composite->page_count, composite->constituent_count, |
| 3403 | share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3404 | share_state->fragment_constituent_counts[0], &total_length, |
| 3405 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 3406 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3407 | /* |
| 3408 | * Copy the message from the buffer into the partition's mailbox. |
| 3409 | * The operation might fail unexpectedly due to change in PAS address |
| 3410 | * space, or improper values to the sizes of the structures. |
| 3411 | */ |
| 3412 | if (!memcpy_trapped(to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3413 | retrieve_request, fragment_length)) { |
| 3414 | dlog_error( |
| 3415 | "%s: aborted the copy of response to RX buffer of " |
| 3416 | "%x.\n", |
| 3417 | __func__, to_locked.vm->id); |
J-Alves | 3f6527c | 2024-04-25 17:10:57 +0100 | [diff] [blame] | 3418 | |
| 3419 | ffa_partition_memory_retrieve_request_undo( |
| 3420 | to_locked, share_state, receiver_index); |
| 3421 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3422 | return ffa_error(FFA_ABORTED); |
| 3423 | } |
| 3424 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3425 | if (is_retrieve_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3426 | ffa_memory_retrieve_complete(share_states, share_state, |
| 3427 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3428 | } |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3429 | |
| 3430 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 3431 | } |
| 3432 | |
| 3433 | static struct ffa_value ffa_hypervisor_retrieve_request( |
| 3434 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 3435 | struct ffa_memory_region *retrieve_request) |
| 3436 | { |
| 3437 | struct ffa_value ret; |
| 3438 | struct ffa_composite_memory_region *composite; |
| 3439 | uint32_t total_length; |
| 3440 | uint32_t fragment_length; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3441 | ffa_memory_attributes_t attributes; |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3442 | uint64_t memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3443 | struct ffa_memory_region *memory_region; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3444 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3445 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 3446 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3447 | memory_region = share_state->memory_region; |
| 3448 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3449 | assert(to_locked.vm->id == HF_HYPERVISOR_VM_ID); |
| 3450 | |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3451 | switch (to_locked.vm->ffa_version) { |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3452 | case FFA_VERSION_1_2: |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3453 | memory_access_desc_size = sizeof(struct ffa_memory_access); |
| 3454 | break; |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3455 | case FFA_VERSION_1_0: |
| 3456 | case FFA_VERSION_1_1: |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3457 | memory_access_desc_size = sizeof(struct ffa_memory_access_v1_0); |
| 3458 | break; |
| 3459 | default: |
| 3460 | panic("version not supported: %x\n", to_locked.vm->ffa_version); |
| 3461 | } |
| 3462 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3463 | if (share_state->hypervisor_fragment_count != 0U) { |
| 3464 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3465 | "Memory with handle %#lx already retrieved by " |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3466 | "the hypervisor.\n", |
| 3467 | handle); |
| 3468 | return ffa_error(FFA_DENIED); |
| 3469 | } |
| 3470 | |
| 3471 | share_state->hypervisor_fragment_count = 1; |
| 3472 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3473 | /* VMs acquire the RX buffer from SPMC. */ |
| 3474 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 3475 | |
| 3476 | /* |
| 3477 | * Copy response to RX buffer of caller and deliver the message. |
| 3478 | * This must be done before the share_state is (possibly) freed. |
| 3479 | */ |
| 3480 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 3481 | |
| 3482 | /* |
| 3483 | * Constituents which we received in the first fragment should |
| 3484 | * always fit in the first fragment we are sending, because the |
| 3485 | * header is the same size in both cases and we have a fixed |
| 3486 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 3487 | * should never fail. |
| 3488 | */ |
| 3489 | |
| 3490 | /* |
| 3491 | * Set the security state in the memory retrieve response attributes |
| 3492 | * if specified by the target mode. |
| 3493 | */ |
| 3494 | attributes = plat_ffa_memory_security_mode( |
| 3495 | memory_region->attributes, share_state->sender_orig_mode); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3496 | |
| 3497 | receiver = ffa_memory_region_get_receiver(memory_region, 0); |
| 3498 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3499 | /* |
| 3500 | * At this point the `retrieve_request` is expected to be in a section |
| 3501 | * managed by the hypervisor. |
| 3502 | */ |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3503 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3504 | retrieve_request, to_locked.vm->ffa_version, HF_MAILBOX_SIZE, |
| 3505 | memory_region->sender, attributes, memory_region->flags, handle, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3506 | receiver->receiver_permissions.permissions, receiver, |
| 3507 | memory_region->receiver_count, memory_access_desc_size, |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3508 | composite->page_count, composite->constituent_count, |
| 3509 | share_state->fragments[0], |
| 3510 | share_state->fragment_constituent_counts[0], &total_length, |
| 3511 | &fragment_length)); |
| 3512 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3513 | /* |
| 3514 | * Copy the message from the buffer into the hypervisor's mailbox. |
| 3515 | * The operation might fail unexpectedly due to change in PAS, or |
| 3516 | * improper values for the sizes of the structures. |
| 3517 | */ |
| 3518 | if (!memcpy_trapped(to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3519 | retrieve_request, fragment_length)) { |
| 3520 | dlog_error( |
| 3521 | "%s: aborted the copy of response to RX buffer of " |
| 3522 | "%x.\n", |
| 3523 | __func__, to_locked.vm->id); |
J-Alves | 3f6527c | 2024-04-25 17:10:57 +0100 | [diff] [blame] | 3524 | |
| 3525 | ffa_hypervisor_memory_retrieve_request_undo(share_state); |
| 3526 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame] | 3527 | return ffa_error(FFA_ABORTED); |
| 3528 | } |
| 3529 | |
J-Alves | 3f6527c | 2024-04-25 17:10:57 +0100 | [diff] [blame] | 3530 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 3531 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3532 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 3533 | } |
| 3534 | |
| 3535 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 3536 | struct ffa_memory_region *retrieve_request, |
| 3537 | uint32_t retrieve_request_length, |
| 3538 | struct mpool *page_pool) |
| 3539 | { |
| 3540 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 3541 | struct share_states_locked share_states; |
| 3542 | struct ffa_memory_share_state *share_state; |
| 3543 | struct ffa_value ret; |
| 3544 | |
| 3545 | dump_share_states(); |
| 3546 | |
| 3547 | share_states = share_states_lock(); |
| 3548 | share_state = get_share_state(share_states, handle); |
| 3549 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3550 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RETRIEVE_REQ.\n", |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3551 | handle); |
| 3552 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3553 | goto out; |
| 3554 | } |
| 3555 | |
| 3556 | if (is_ffa_hypervisor_retrieve_request(retrieve_request, to_locked)) { |
| 3557 | ret = ffa_hypervisor_retrieve_request(share_state, to_locked, |
| 3558 | retrieve_request); |
| 3559 | } else { |
| 3560 | ret = ffa_partition_retrieve_request( |
| 3561 | share_states, share_state, to_locked, retrieve_request, |
| 3562 | retrieve_request_length, page_pool); |
| 3563 | } |
| 3564 | |
| 3565 | /* Track use of the RX buffer if the handling has succeeded. */ |
| 3566 | if (ret.func == FFA_MEM_RETRIEVE_RESP_32) { |
| 3567 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
| 3568 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
| 3569 | } |
| 3570 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3571 | out: |
| 3572 | share_states_unlock(&share_states); |
| 3573 | dump_share_states(); |
| 3574 | return ret; |
| 3575 | } |
| 3576 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3577 | /** |
| 3578 | * Determine expected fragment offset according to the FF-A version of |
| 3579 | * the caller. |
| 3580 | */ |
| 3581 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3582 | struct ffa_memory_region *memory_region, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3583 | uint32_t retrieved_constituents_count, enum ffa_version ffa_version) |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3584 | { |
| 3585 | uint32_t expected_fragment_offset; |
| 3586 | uint32_t composite_constituents_offset; |
| 3587 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3588 | if (ffa_version >= FFA_VERSION_1_1) { |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3589 | /* |
| 3590 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 3591 | * can retrieve the constituents offset from descriptor. |
| 3592 | */ |
| 3593 | composite_constituents_offset = |
| 3594 | ffa_composite_constituent_offset(memory_region, 0); |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3595 | } else if (ffa_version == FFA_VERSION_1_0) { |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3596 | /* |
| 3597 | * If retriever is FF-A v1.0, determine the composite offset |
| 3598 | * as it is expected to have been configured in the |
| 3599 | * retrieve response. |
| 3600 | */ |
| 3601 | composite_constituents_offset = |
| 3602 | sizeof(struct ffa_memory_region_v1_0) + |
| 3603 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3604 | sizeof(struct ffa_memory_access_v1_0) + |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3605 | sizeof(struct ffa_composite_memory_region); |
| 3606 | } else { |
| 3607 | panic("%s received an invalid FF-A version.\n", __func__); |
| 3608 | } |
| 3609 | |
| 3610 | expected_fragment_offset = |
| 3611 | composite_constituents_offset + |
| 3612 | retrieved_constituents_count * |
| 3613 | sizeof(struct ffa_memory_region_constituent) - |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3614 | (uint32_t)(memory_region->memory_access_desc_size * |
| 3615 | (memory_region->receiver_count - 1)); |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3616 | |
| 3617 | return expected_fragment_offset; |
| 3618 | } |
| 3619 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3620 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 3621 | ffa_memory_handle_t handle, |
| 3622 | uint32_t fragment_offset, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 3623 | ffa_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3624 | struct mpool *page_pool) |
| 3625 | { |
| 3626 | struct ffa_memory_region *memory_region; |
| 3627 | struct share_states_locked share_states; |
| 3628 | struct ffa_memory_share_state *share_state; |
| 3629 | struct ffa_value ret; |
| 3630 | uint32_t fragment_index; |
| 3631 | uint32_t retrieved_constituents_count; |
| 3632 | uint32_t i; |
| 3633 | uint32_t expected_fragment_offset; |
| 3634 | uint32_t remaining_constituent_count; |
| 3635 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3636 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3637 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3638 | |
| 3639 | dump_share_states(); |
| 3640 | |
| 3641 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3642 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3643 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3644 | dlog_verbose("Invalid handle %#lx for FFA_MEM_FRAG_RX.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3645 | handle); |
| 3646 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3647 | goto out; |
| 3648 | } |
| 3649 | |
| 3650 | memory_region = share_state->memory_region; |
| 3651 | CHECK(memory_region != NULL); |
| 3652 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3653 | if (!share_state->sending_complete) { |
| 3654 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3655 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3656 | "retrieve.\n", |
| 3657 | handle); |
| 3658 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3659 | goto out; |
| 3660 | } |
| 3661 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3662 | /* |
| 3663 | * If retrieve request from the hypervisor has been initiated in the |
| 3664 | * given share_state, continue it, else assume it is a continuation of |
| 3665 | * retrieve request from a NWd VM. |
| 3666 | */ |
| 3667 | continue_ffa_hyp_mem_retrieve_req = |
| 3668 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 3669 | (share_state->hypervisor_fragment_count != 0U) && |
J-Alves | 661e1b7 | 2023-08-02 13:39:40 +0100 | [diff] [blame] | 3670 | ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3671 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3672 | if (!continue_ffa_hyp_mem_retrieve_req) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3673 | receiver_index = ffa_memory_region_get_receiver_index( |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3674 | memory_region, to_locked.vm->id); |
| 3675 | |
| 3676 | if (receiver_index == memory_region->receiver_count) { |
| 3677 | dlog_verbose( |
| 3678 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3679 | "borrower to memory sharing transaction " |
| 3680 | "(%lx)\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3681 | to_locked.vm->id, handle); |
| 3682 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3683 | goto out; |
| 3684 | } |
| 3685 | |
| 3686 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3687 | 0 || |
| 3688 | share_state->retrieved_fragment_count[receiver_index] >= |
| 3689 | share_state->fragment_count) { |
| 3690 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3691 | "Retrieval of memory with handle %#lx not yet " |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3692 | "started or already completed (%d/%d fragments " |
| 3693 | "retrieved).\n", |
| 3694 | handle, |
| 3695 | share_state->retrieved_fragment_count |
| 3696 | [receiver_index], |
| 3697 | share_state->fragment_count); |
| 3698 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3699 | goto out; |
| 3700 | } |
| 3701 | |
| 3702 | fragment_index = |
| 3703 | share_state->retrieved_fragment_count[receiver_index]; |
| 3704 | } else { |
| 3705 | if (share_state->hypervisor_fragment_count == 0 || |
| 3706 | share_state->hypervisor_fragment_count >= |
| 3707 | share_state->fragment_count) { |
| 3708 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3709 | "Retrieve of memory with handle %lx not " |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3710 | "started from hypervisor.\n", |
| 3711 | handle); |
| 3712 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3713 | goto out; |
| 3714 | } |
| 3715 | |
| 3716 | if (memory_region->sender != sender_vm_id) { |
| 3717 | dlog_verbose( |
| 3718 | "Sender ID (%x) is not as expected for memory " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3719 | "handle %lx\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3720 | sender_vm_id, handle); |
| 3721 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3722 | goto out; |
| 3723 | } |
| 3724 | |
| 3725 | fragment_index = share_state->hypervisor_fragment_count; |
| 3726 | |
| 3727 | receiver_index = 0; |
| 3728 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3729 | |
| 3730 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3731 | * Check that the given fragment offset is correct by counting |
| 3732 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3733 | */ |
| 3734 | retrieved_constituents_count = 0; |
| 3735 | for (i = 0; i < fragment_index; ++i) { |
| 3736 | retrieved_constituents_count += |
| 3737 | share_state->fragment_constituent_counts[i]; |
| 3738 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3739 | |
| 3740 | CHECK(memory_region->receiver_count > 0); |
| 3741 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3742 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3743 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3744 | memory_region, retrieved_constituents_count, |
| 3745 | to_locked.vm->ffa_version); |
| 3746 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3747 | if (fragment_offset != expected_fragment_offset) { |
| 3748 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 3749 | fragment_offset, expected_fragment_offset); |
| 3750 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3751 | goto out; |
| 3752 | } |
| 3753 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3754 | /* |
| 3755 | * When hafnium is the hypervisor, acquire the RX buffer of a VM, that |
| 3756 | * is currently ownder by the SPMC. |
| 3757 | */ |
| 3758 | assert(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3759 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3760 | remaining_constituent_count = ffa_memory_fragment_init( |
| 3761 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3762 | share_state->fragments[fragment_index], |
| 3763 | share_state->fragment_constituent_counts[fragment_index], |
| 3764 | &fragment_length); |
| 3765 | CHECK(remaining_constituent_count == 0); |
J-Alves | 674e4de | 2024-01-17 16:20:32 +0000 | [diff] [blame] | 3766 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3767 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 3768 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3769 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3770 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 3771 | share_state->retrieved_fragment_count[receiver_index]++; |
| 3772 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3773 | share_state->fragment_count) { |
| 3774 | ffa_memory_retrieve_complete(share_states, share_state, |
| 3775 | page_pool); |
| 3776 | } |
| 3777 | } else { |
| 3778 | share_state->hypervisor_fragment_count++; |
| 3779 | |
| 3780 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 3781 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3782 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 3783 | .arg1 = (uint32_t)handle, |
| 3784 | .arg2 = (uint32_t)(handle >> 32), |
| 3785 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3786 | |
| 3787 | out: |
| 3788 | share_states_unlock(&share_states); |
| 3789 | dump_share_states(); |
| 3790 | return ret; |
| 3791 | } |
| 3792 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3793 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3794 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3795 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3796 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3797 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3798 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3799 | struct ffa_memory_share_state *share_state; |
| 3800 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3801 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3802 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3803 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3804 | bool receivers_relinquished_memory; |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3805 | ffa_memory_access_permissions_t receiver_permissions = {0}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3806 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3807 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3808 | dlog_verbose( |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 3809 | "Stream endpoints not supported (got %d endpoints on " |
| 3810 | "FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3811 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3812 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3813 | } |
| 3814 | |
J-Alves | bd06034 | 2024-04-26 18:44:31 +0100 | [diff] [blame] | 3815 | if (vm_id_is_current_world(from_locked.vm->id) && |
| 3816 | relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3817 | dlog_verbose( |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 3818 | "VM ID %d in relinquish message doesn't match calling " |
| 3819 | "VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3820 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3821 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3822 | } |
| 3823 | |
| 3824 | dump_share_states(); |
| 3825 | |
| 3826 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3827 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3828 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3829 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3830 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3831 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3832 | goto out; |
| 3833 | } |
| 3834 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3835 | if (!share_state->sending_complete) { |
| 3836 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3837 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3838 | "relinquish.\n", |
| 3839 | handle); |
| 3840 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3841 | goto out; |
| 3842 | } |
| 3843 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3844 | memory_region = share_state->memory_region; |
| 3845 | CHECK(memory_region != NULL); |
| 3846 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3847 | receiver_index = ffa_memory_region_get_receiver_index( |
J-Alves | bd06034 | 2024-04-26 18:44:31 +0100 | [diff] [blame] | 3848 | memory_region, relinquish_request->endpoints[0]); |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3849 | |
| 3850 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3851 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3852 | "VM ID %d tried to relinquish memory region " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3853 | "with handle %#lx and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3854 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3855 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3856 | goto out; |
| 3857 | } |
| 3858 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3859 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3860 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3861 | dlog_verbose( |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 3862 | "Memory with handle %#lx not yet fully retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3863 | "receiver %x can't relinquish.\n", |
| 3864 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3865 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3866 | goto out; |
| 3867 | } |
| 3868 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3869 | /* |
| 3870 | * Either clear if requested in relinquish call, or in a retrieve |
| 3871 | * request from one of the borrowers. |
| 3872 | */ |
| 3873 | receivers_relinquished_memory = true; |
| 3874 | |
| 3875 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3876 | struct ffa_memory_access *receiver = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3877 | ffa_memory_region_get_receiver(memory_region, i); |
| 3878 | assert(receiver != NULL); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3879 | if (receiver->receiver_permissions.receiver == |
| 3880 | from_locked.vm->id) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3881 | receiver_permissions = |
| 3882 | receiver->receiver_permissions.permissions; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3883 | continue; |
| 3884 | } |
| 3885 | |
| 3886 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 3887 | receivers_relinquished_memory = false; |
| 3888 | break; |
| 3889 | } |
| 3890 | } |
| 3891 | |
| 3892 | clear = receivers_relinquished_memory && |
Daniel Boulby | 2e14ebe | 2024-01-15 16:21:44 +0000 | [diff] [blame] | 3893 | ((relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 3894 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3895 | |
| 3896 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3897 | * Clear is not allowed for memory that was shared, as the |
| 3898 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3899 | */ |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 3900 | if (clear && (share_state->share_func == FFA_MEM_SHARE_32 || |
| 3901 | share_state->share_func == FFA_MEM_SHARE_64)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3902 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3903 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3904 | goto out; |
| 3905 | } |
| 3906 | |
J-Alves | b886d49 | 2024-04-15 10:55:29 +0100 | [diff] [blame] | 3907 | if (clear && receiver_permissions.data_access == FFA_DATA_ACCESS_RO) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3908 | dlog_verbose("%s: RO memory can't use clear memory flag.\n", |
| 3909 | __func__); |
| 3910 | ret = ffa_error(FFA_DENIED); |
| 3911 | goto out; |
| 3912 | } |
| 3913 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3914 | ret = ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3915 | from_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3916 | share_state->fragment_constituent_counts, |
J-Alves | 69cdfd9 | 2024-04-26 11:40:59 +0100 | [diff] [blame] | 3917 | share_state->fragment_count, share_state->sender_orig_mode, |
| 3918 | page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3919 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3920 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3921 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3922 | * Mark memory handle as not retrieved, so it can be |
| 3923 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3924 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3925 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3926 | } |
| 3927 | |
| 3928 | out: |
| 3929 | share_states_unlock(&share_states); |
| 3930 | dump_share_states(); |
| 3931 | return ret; |
| 3932 | } |
| 3933 | |
| 3934 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3935 | * Validates that the reclaim transition is allowed for the given |
| 3936 | * handle, updates the page table of the reclaiming VM, and frees the |
| 3937 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3938 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3939 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3940 | ffa_memory_handle_t handle, |
| 3941 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3942 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3943 | { |
| 3944 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3945 | struct ffa_memory_share_state *share_state; |
| 3946 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3947 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3948 | |
| 3949 | dump_share_states(); |
| 3950 | |
| 3951 | share_states = share_states_lock(); |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 3952 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3953 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3954 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3955 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3956 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3957 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3958 | goto out; |
| 3959 | } |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3960 | memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3961 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3962 | CHECK(memory_region != NULL); |
| 3963 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3964 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 3965 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3966 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3967 | "VM %#x attempted to reclaim memory handle %#lx " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 3968 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3969 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3970 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3971 | goto out; |
| 3972 | } |
| 3973 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3974 | if (!share_state->sending_complete) { |
| 3975 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3976 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3977 | "reclaim.\n", |
| 3978 | handle); |
| 3979 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3980 | goto out; |
| 3981 | } |
| 3982 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3983 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3984 | if (share_state->retrieved_fragment_count[i] != 0) { |
J-Alves | 9bbcb87 | 2024-04-25 17:19:00 +0100 | [diff] [blame] | 3985 | struct ffa_memory_access *receiver = |
| 3986 | ffa_memory_region_get_receiver(memory_region, |
| 3987 | i); |
| 3988 | |
| 3989 | assert(receiver != NULL); |
| 3990 | (void)receiver; |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3991 | dlog_verbose( |
J-Alves | 0a824e9 | 2024-04-26 16:20:12 +0100 | [diff] [blame] | 3992 | "Tried to reclaim memory handle %#lx that has " |
| 3993 | "not been relinquished by all borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3994 | handle, |
J-Alves | 9bbcb87 | 2024-04-25 17:19:00 +0100 | [diff] [blame] | 3995 | receiver->receiver_permissions.receiver); |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3996 | ret = ffa_error(FFA_DENIED); |
| 3997 | goto out; |
| 3998 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3999 | } |
| 4000 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 4001 | ret = ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 4002 | to_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 4003 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 4004 | share_state->fragment_count, share_state->sender_orig_mode, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 4005 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 4006 | NULL, share_state->memory_protected); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 4007 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 4008 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 4009 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 4010 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 4011 | } |
| 4012 | |
| 4013 | out: |
| 4014 | share_states_unlock(&share_states); |
| 4015 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 4016 | } |