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 | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 364 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 365 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 366 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 367 | { |
| 368 | uint32_t mode = 0; |
| 369 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 370 | switch (permissions.data_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 371 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 372 | mode = MM_MODE_R; |
| 373 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 374 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 375 | mode = MM_MODE_R | MM_MODE_W; |
| 376 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 377 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 378 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 379 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 380 | case FFA_DATA_ACCESS_RESERVED: |
| 381 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 382 | } |
| 383 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 384 | switch (permissions.instruction_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 385 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 386 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 387 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 388 | mode |= MM_MODE_X; |
| 389 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 390 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 391 | mode |= (default_mode & MM_MODE_X); |
| 392 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 393 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 394 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 397 | /* Set the security state bit if necessary. */ |
| 398 | if ((default_mode & plat_ffa_other_world_mode()) != 0) { |
| 399 | mode |= plat_ffa_other_world_mode(); |
| 400 | } |
| 401 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 402 | return mode; |
| 403 | } |
| 404 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 405 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 406 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 407 | * 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] | 408 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 409 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 410 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 411 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 412 | struct ffa_memory_region_constituent **fragments, |
| 413 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 414 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 415 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 416 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 417 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 418 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 419 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 420 | * Fail if there are no constituents. Otherwise we would get an |
| 421 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 422 | */ |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 423 | dlog_verbose("%s: no constituents\n", __func__); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 424 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 425 | } |
| 426 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 427 | for (i = 0; i < fragment_count; ++i) { |
| 428 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 429 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 430 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 431 | ipaddr_t end = ipa_add(begin, size); |
| 432 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 433 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 434 | /* Fail if addresses are not page-aligned. */ |
| 435 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 436 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 437 | dlog_verbose("%s: addresses not page-aligned\n", |
| 438 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 439 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 440 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 441 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 442 | /* |
| 443 | * Ensure that this constituent memory range is all |
| 444 | * mapped with the same mode. |
| 445 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 446 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 447 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 448 | "%s: constituent memory range " |
| 449 | "%#lx..%#lx " |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 450 | "not mapped with the same mode\n", |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 451 | __func__, begin.ipa, end.ipa); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 452 | return ffa_error(FFA_DENIED); |
| 453 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 454 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 455 | /* |
| 456 | * Ensure that all constituents are mapped with the same |
| 457 | * mode. |
| 458 | */ |
| 459 | if (i == 0) { |
| 460 | *orig_mode = current_mode; |
| 461 | } else if (current_mode != *orig_mode) { |
| 462 | dlog_verbose( |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 463 | "%s: expected mode %#x but was %#x for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 464 | "%d pages at %#lx.\n", |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 465 | __func__, *orig_mode, current_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 466 | fragments[i][j].page_count, |
| 467 | ipa_addr(begin)); |
| 468 | return ffa_error(FFA_DENIED); |
| 469 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 470 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 471 | } |
| 472 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 473 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 474 | } |
| 475 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 476 | enum ffa_version ffa_version_from_memory_access_desc_size( |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 477 | uint32_t memory_access_desc_size) |
| 478 | { |
| 479 | switch (memory_access_desc_size) { |
| 480 | /* |
| 481 | * v1.0 and v1.1 memory access descriptors are the same size however |
| 482 | * v1.1 is the first version to include the memory access descriptor |
| 483 | * size field so return v1.1. |
| 484 | */ |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 485 | case sizeof(struct ffa_memory_access_v1_0): |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 486 | return FFA_VERSION_1_1; |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 487 | case sizeof(struct ffa_memory_access): |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 488 | return FFA_VERSION_1_2; |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 489 | } |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * Check if the receivers size and offset given is valid for the senders |
| 495 | * FF-A version. |
| 496 | */ |
| 497 | static bool receiver_size_and_offset_valid_for_version( |
| 498 | uint32_t receivers_size, uint32_t receivers_offset, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 499 | enum ffa_version ffa_version) |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 500 | { |
| 501 | /* |
| 502 | * Check that the version that the memory access descriptor size belongs |
| 503 | * to is compatible with the FF-A version we believe the sender to be. |
| 504 | */ |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 505 | enum ffa_version expected_ffa_version = |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 506 | ffa_version_from_memory_access_desc_size(receivers_size); |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 507 | if (!ffa_versions_are_compatible(expected_ffa_version, ffa_version)) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 508 | return false; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Check the receivers_offset matches the version we found from |
| 513 | * memory access descriptor size. |
| 514 | */ |
| 515 | switch (expected_ffa_version) { |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 516 | case FFA_VERSION_1_1: |
| 517 | case FFA_VERSION_1_2: |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 518 | return receivers_offset == sizeof(struct ffa_memory_region); |
| 519 | default: |
| 520 | return false; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * Check the values set for fields in the memory region are valid and safe. |
| 526 | * Offset values are within safe bounds, receiver count will not cause overflows |
| 527 | * and reserved fields are 0. |
| 528 | */ |
| 529 | bool ffa_memory_region_sanity_check(struct ffa_memory_region *memory_region, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 530 | enum ffa_version ffa_version, |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 531 | uint32_t fragment_length, |
| 532 | bool send_transaction) |
| 533 | { |
| 534 | uint32_t receiver_count; |
| 535 | struct ffa_memory_access *receiver; |
| 536 | uint32_t composite_offset_0; |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 537 | struct ffa_memory_region_v1_0 *memory_region_v1_0 = |
| 538 | (struct ffa_memory_region_v1_0 *)memory_region; |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 539 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 540 | if (ffa_version == FFA_VERSION_1_0) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 541 | /* Check the reserved fields are 0. */ |
| 542 | if (memory_region_v1_0->reserved_0 != 0 || |
| 543 | memory_region_v1_0->reserved_1 != 0) { |
| 544 | dlog_verbose("Reserved fields must be 0.\n"); |
| 545 | return false; |
| 546 | } |
| 547 | |
| 548 | receiver_count = memory_region_v1_0->receiver_count; |
| 549 | } else { |
| 550 | uint32_t receivers_size = |
| 551 | memory_region->memory_access_desc_size; |
| 552 | uint32_t receivers_offset = memory_region->receivers_offset; |
| 553 | |
| 554 | /* Check the reserved field is 0. */ |
| 555 | if (memory_region->reserved[0] != 0 || |
| 556 | memory_region->reserved[1] != 0 || |
| 557 | memory_region->reserved[2] != 0) { |
| 558 | dlog_verbose("Reserved fields must be 0.\n"); |
| 559 | return false; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Check memory_access_desc_size matches the size of the struct |
| 564 | * for the senders FF-A version. |
| 565 | */ |
| 566 | if (!receiver_size_and_offset_valid_for_version( |
| 567 | receivers_size, receivers_offset, ffa_version)) { |
| 568 | dlog_verbose( |
| 569 | "Invalid memory access descriptor size %d, " |
| 570 | " or receiver offset %d, " |
| 571 | "for FF-A version %#x\n", |
| 572 | receivers_size, receivers_offset, ffa_version); |
| 573 | return false; |
| 574 | } |
| 575 | |
| 576 | receiver_count = memory_region->receiver_count; |
| 577 | } |
| 578 | |
| 579 | /* Check receiver count is not too large. */ |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 580 | if (receiver_count > MAX_MEM_SHARE_RECIPIENTS || receiver_count < 1) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 581 | dlog_verbose( |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 582 | "Receiver count must be 0 < receiver_count < %u " |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 583 | "specified %u\n", |
| 584 | MAX_MEM_SHARE_RECIPIENTS, receiver_count); |
| 585 | return false; |
| 586 | } |
| 587 | |
| 588 | /* Check values in the memory access descriptors. */ |
| 589 | /* |
| 590 | * The composite offset values must be the same for all recievers so |
| 591 | * check the first one is valid and then they are all the same. |
| 592 | */ |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 593 | receiver = ffa_version == FFA_VERSION_1_0 |
Daniel Boulby | f06b523 | 2024-02-22 16:26:43 +0000 | [diff] [blame] | 594 | ? (struct ffa_memory_access *)&memory_region_v1_0 |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 595 | ->receivers[0] |
| 596 | : ffa_memory_region_get_receiver(memory_region, 0); |
| 597 | assert(receiver != NULL); |
| 598 | composite_offset_0 = receiver->composite_memory_region_offset; |
| 599 | |
| 600 | if (!send_transaction) { |
| 601 | if (composite_offset_0 != 0) { |
| 602 | dlog_verbose( |
| 603 | "Composite offset memory region descriptor " |
| 604 | "offset must be 0 for retrieve requests. " |
| 605 | "Currently %d", |
| 606 | composite_offset_0); |
| 607 | return false; |
| 608 | } |
| 609 | } else { |
| 610 | bool comp_offset_is_zero = composite_offset_0 == 0U; |
| 611 | bool comp_offset_lt_transaction_descriptor_size = |
| 612 | composite_offset_0 < |
| 613 | (sizeof(struct ffa_memory_region) + |
| 614 | (uint32_t)(memory_region->memory_access_desc_size * |
| 615 | memory_region->receiver_count)); |
| 616 | bool comp_offset_with_comp_gt_fragment_length = |
| 617 | composite_offset_0 + |
| 618 | sizeof(struct ffa_composite_memory_region) > |
| 619 | fragment_length; |
| 620 | if (comp_offset_is_zero || |
| 621 | comp_offset_lt_transaction_descriptor_size || |
| 622 | comp_offset_with_comp_gt_fragment_length) { |
| 623 | dlog_verbose( |
| 624 | "Invalid composite memory region descriptor " |
| 625 | "offset for send transaction %u\n", |
| 626 | composite_offset_0); |
| 627 | return false; |
| 628 | } |
| 629 | } |
| 630 | |
Karl Meakin | 824b63d | 2024-06-03 19:04:53 +0100 | [diff] [blame] | 631 | for (size_t i = 0; i < memory_region->receiver_count; i++) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 632 | uint32_t composite_offset; |
| 633 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 634 | if (ffa_version == FFA_VERSION_1_0) { |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 635 | struct ffa_memory_access_v1_0 *receiver_v1_0 = |
| 636 | &memory_region_v1_0->receivers[i]; |
| 637 | /* Check reserved fields are 0 */ |
| 638 | if (receiver_v1_0->reserved_0 != 0) { |
| 639 | dlog_verbose( |
| 640 | "Reserved field in the memory access " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 641 | "descriptor must be zero. Currently " |
| 642 | "reciever %zu has a reserved field " |
| 643 | "with a value of %lu\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 644 | i, receiver_v1_0->reserved_0); |
| 645 | return false; |
| 646 | } |
| 647 | /* |
| 648 | * We can cast to the current version receiver as the |
| 649 | * remaining fields we are checking have the same |
| 650 | * offsets for all versions since memory access |
| 651 | * descriptors are forwards compatible. |
| 652 | */ |
| 653 | receiver = (struct ffa_memory_access *)receiver_v1_0; |
| 654 | } else { |
| 655 | receiver = ffa_memory_region_get_receiver(memory_region, |
| 656 | i); |
| 657 | assert(receiver != NULL); |
| 658 | |
| 659 | if (receiver->reserved_0 != 0) { |
| 660 | dlog_verbose( |
| 661 | "Reserved field in the memory access " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 662 | "descriptor must be zero. Currently " |
| 663 | "reciever %zu has a reserved field " |
| 664 | "with a value of %lu\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 665 | i, receiver->reserved_0); |
| 666 | return false; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | /* Check composite offset values are equal for all receivers. */ |
| 671 | composite_offset = receiver->composite_memory_region_offset; |
| 672 | if (composite_offset != composite_offset_0) { |
| 673 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 674 | "Composite offset %x differs from %x in " |
| 675 | "index\n", |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 676 | composite_offset, composite_offset_0); |
| 677 | return false; |
| 678 | } |
| 679 | } |
| 680 | return true; |
| 681 | } |
| 682 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 683 | /** |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 684 | * If the receivers for the memory management operation are all from the |
| 685 | * secure world and this isn't a FFA_MEM_SHARE, then request memory security |
| 686 | * state update by returning MAP_ACTION_CHECK_PROTECT. |
| 687 | */ |
| 688 | static enum ffa_map_action ffa_mem_send_get_map_action( |
| 689 | bool all_receivers_from_current_world, ffa_id_t sender_id, |
| 690 | uint32_t mem_func_id) |
| 691 | { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 692 | const bool is_memory_share_abi = mem_func_id == FFA_MEM_SHARE_32 || |
| 693 | mem_func_id == FFA_MEM_SHARE_64; |
| 694 | const bool protect_memory = |
| 695 | (!is_memory_share_abi && all_receivers_from_current_world && |
| 696 | ffa_is_vm_id(sender_id)); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 697 | |
| 698 | return protect_memory ? MAP_ACTION_CHECK_PROTECT : MAP_ACTION_CHECK; |
| 699 | } |
| 700 | |
| 701 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 702 | * Verify that all pages have the same mode, that the starting mode |
| 703 | * constitutes a valid state and obtain the next mode to apply |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 704 | * to the sending VM. It outputs the mapping action that needs to be |
| 705 | * invoked for the given memory range. On memory lend/donate there |
| 706 | * could be a need to protect the memory from the normal world. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 707 | * |
| 708 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 709 | * 1) FFA_DENIED if a state transition was not found; |
| 710 | * 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] | 711 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 712 | * 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] | 713 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 714 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 715 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 716 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 717 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 718 | struct vm_locked from, uint32_t share_func, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 719 | struct ffa_memory_region *memory_region, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 720 | struct ffa_memory_region_constituent **fragments, |
| 721 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 722 | uint32_t *from_mode, enum ffa_map_action *map_action, bool zero) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 723 | { |
| 724 | const uint32_t state_mask = |
| 725 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 726 | struct ffa_value ret; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 727 | bool all_receivers_from_current_world = true; |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 728 | uint32_t receivers_count = memory_region->receiver_count; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 729 | const bool is_memory_lend = (share_func == FFA_MEM_LEND_32) || |
| 730 | (share_func == FFA_MEM_LEND_64); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 731 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 732 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 733 | fragment_constituent_counts, |
| 734 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 735 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 736 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 737 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 738 | } |
| 739 | |
Daniel Boulby | 63af1fa | 2024-03-18 14:17:31 +0000 | [diff] [blame] | 740 | /* Device memory regions can only be lent a single borrower. */ |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 741 | if ((*orig_from_mode & MM_MODE_D) != 0U && |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 742 | !(is_memory_lend && receivers_count == 1)) { |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 743 | dlog_verbose( |
Daniel Boulby | 63af1fa | 2024-03-18 14:17:31 +0000 | [diff] [blame] | 744 | "Device memory can only be lent to a single borrower " |
| 745 | "(mode is %#x).\n", |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 746 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 747 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Ensure the sender is the owner and has exclusive access to the |
| 752 | * memory. |
| 753 | */ |
| 754 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 755 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 756 | } |
| 757 | |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 758 | /* |
| 759 | * Memory cannot be zeroed during the lend/donate operation if the |
| 760 | * sender only has RO access. |
| 761 | */ |
| 762 | if ((*orig_from_mode & MM_MODE_W) == 0 && zero == true) { |
| 763 | dlog_verbose( |
| 764 | "Cannot zero memory when the sender doesn't have " |
| 765 | "write access\n"); |
| 766 | return ffa_error(FFA_DENIED); |
| 767 | } |
| 768 | |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 769 | assert(receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 770 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 771 | for (uint32_t i = 0U; i < receivers_count; i++) { |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 772 | struct ffa_memory_access *receiver = |
| 773 | ffa_memory_region_get_receiver(memory_region, i); |
| 774 | assert(receiver != NULL); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 775 | ffa_memory_access_permissions_t permissions = |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 776 | receiver->receiver_permissions.permissions; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 777 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 778 | permissions, *orig_from_mode); |
| 779 | |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 780 | /* |
| 781 | * The assumption is that at this point, the operation from |
| 782 | * SP to a receiver VM, should have returned an FFA_ERROR |
| 783 | * already. |
| 784 | */ |
| 785 | if (!ffa_is_vm_id(from.vm->id)) { |
| 786 | assert(!ffa_is_vm_id( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 787 | receiver->receiver_permissions.receiver)); |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 788 | } |
| 789 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 790 | /* Track if all senders are from current world. */ |
| 791 | all_receivers_from_current_world = |
| 792 | all_receivers_from_current_world && |
| 793 | vm_id_is_current_world( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 794 | receiver->receiver_permissions.receiver); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 795 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 796 | if ((*orig_from_mode & required_from_mode) != |
| 797 | required_from_mode) { |
| 798 | dlog_verbose( |
| 799 | "Sender tried to send memory with permissions " |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 800 | "which required mode %#x but only had %#x " |
| 801 | "itself.\n", |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 802 | required_from_mode, *orig_from_mode); |
| 803 | return ffa_error(FFA_DENIED); |
| 804 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 805 | } |
| 806 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 807 | *map_action = ffa_mem_send_get_map_action( |
| 808 | all_receivers_from_current_world, from.vm->id, share_func); |
| 809 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 810 | /* Find the appropriate new mode. */ |
| 811 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 812 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 813 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 814 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 815 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 816 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 817 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 818 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 819 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 820 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 821 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 822 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 823 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 824 | break; |
| 825 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 826 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 827 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 828 | } |
| 829 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 830 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 831 | } |
| 832 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 833 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 834 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 835 | struct ffa_memory_region_constituent **fragments, |
| 836 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 837 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 838 | { |
| 839 | const uint32_t state_mask = |
| 840 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 841 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 842 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 843 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 844 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 845 | fragment_constituent_counts, |
| 846 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 847 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 848 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 849 | } |
| 850 | |
| 851 | /* Ensure the address range is normal memory and not a device. */ |
| 852 | if (*orig_from_mode & MM_MODE_D) { |
| 853 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 854 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 855 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 856 | } |
| 857 | |
| 858 | /* |
| 859 | * Ensure the relinquishing VM is not the owner but has access to the |
| 860 | * memory. |
| 861 | */ |
| 862 | orig_from_state = *orig_from_mode & state_mask; |
| 863 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 864 | dlog_verbose( |
| 865 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 866 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 867 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 868 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | /* Find the appropriate new mode. */ |
| 872 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 873 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 874 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 875 | } |
| 876 | |
| 877 | /** |
| 878 | * Verify that all pages have the same mode, that the starting mode |
| 879 | * constitutes a valid state and obtain the next mode to apply |
| 880 | * to the retrieving VM. |
| 881 | * |
| 882 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 883 | * 1) FFA_DENIED if a state transition was not found; |
| 884 | * 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] | 885 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 886 | * 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] | 887 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 888 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 889 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 890 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 891 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 892 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 893 | struct ffa_memory_region_constituent **fragments, |
| 894 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 895 | uint32_t memory_to_attributes, uint32_t *to_mode, bool memory_protected, |
| 896 | enum ffa_map_action *map_action) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 897 | { |
| 898 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 899 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 900 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 901 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 902 | fragment_constituent_counts, |
| 903 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 904 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 905 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 906 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 907 | } |
| 908 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 909 | /* Find the appropriate new mode. */ |
| 910 | *to_mode = memory_to_attributes; |
| 911 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 912 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 913 | /* |
| 914 | * If the original ffa memory send call has been processed |
| 915 | * successfully, it is expected the orig_to_mode would overlay |
| 916 | * with `state_mask`, as a result of the function |
| 917 | * `ffa_send_check_transition`. |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 918 | * |
| 919 | * If Hafnium is the SPMC: |
| 920 | * - Caller of the reclaim interface is an SP, the memory shall |
| 921 | * have been protected throughout the flow. |
| 922 | * - Caller of the reclaim is from the NWd, the memory may have |
| 923 | * been protected at the time of lending/donating the memory. |
| 924 | * In such case, set action to unprotect memory in the |
| 925 | * handling of reclaim operation. |
| 926 | * - If Hafnium is the hypervisor memory shall never have been |
| 927 | * protected in memory lend/share/donate. |
| 928 | * |
| 929 | * More details in the doc comment of the function |
| 930 | * `ffa_region_group_identity_map`. |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 931 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 932 | if (vm_id_is_current_world(to.vm->id)) { |
| 933 | assert((orig_to_mode & |
| 934 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 935 | MM_MODE_SHARED)) != 0U); |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 936 | assert(!memory_protected); |
| 937 | } else if (to.vm->id == HF_OTHER_WORLD_ID && |
| 938 | map_action != NULL && memory_protected) { |
| 939 | *map_action = MAP_ACTION_COMMIT_UNPROTECT; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 940 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 941 | } else { |
| 942 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 943 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 944 | * Ensure the retriever has the expected state. We don't care |
| 945 | * about the MM_MODE_SHARED bit; either with or without it set |
| 946 | * are both valid representations of the !O-NA state. |
| 947 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 948 | if (vm_id_is_current_world(to.vm->id) && |
| 949 | to.vm->id != HF_PRIMARY_VM_ID && |
| 950 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 951 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 952 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 953 | } |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 954 | |
| 955 | /* |
| 956 | * If memory has been protected before, clear the NS bit to |
| 957 | * allow the secure access from the SP. |
| 958 | */ |
| 959 | if (memory_protected) { |
| 960 | *to_mode &= ~plat_ffa_other_world_mode(); |
| 961 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 962 | } |
| 963 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 964 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 965 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 966 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 967 | *to_mode |= 0; |
| 968 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 969 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 970 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 971 | *to_mode |= MM_MODE_UNOWNED; |
| 972 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 973 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 974 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 975 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 976 | break; |
| 977 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 978 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 979 | *to_mode |= 0; |
| 980 | break; |
| 981 | |
| 982 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 983 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 984 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 985 | } |
| 986 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 987 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 988 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 989 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 990 | /* |
| 991 | * Performs the operations related to the `action` MAP_ACTION_CHECK*. |
| 992 | * Returns: |
| 993 | * - FFA_SUCCESS_32: if all goes well. |
| 994 | * - FFA_ERROR_32: with FFA_NO_MEMORY, if there is no memory to manage |
| 995 | * the page table update. Or error code provided by the function |
| 996 | * `arch_memory_protect`. |
| 997 | */ |
| 998 | static struct ffa_value ffa_region_group_check_actions( |
| 999 | struct vm_locked vm_locked, paddr_t pa_begin, paddr_t pa_end, |
| 1000 | struct mpool *ppool, uint32_t mode, enum ffa_map_action action, |
| 1001 | bool *memory_protected) |
| 1002 | { |
| 1003 | struct ffa_value ret; |
| 1004 | bool is_memory_protected; |
| 1005 | |
| 1006 | if (!vm_identity_prepare(vm_locked, pa_begin, pa_end, mode, ppool)) { |
| 1007 | dlog_verbose( |
| 1008 | "%s: memory can't be mapped to %x due to lack of " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1009 | "memory. Base: %lx end: %lx\n", |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1010 | __func__, vm_locked.vm->id, pa_addr(pa_begin), |
| 1011 | pa_addr(pa_end)); |
| 1012 | return ffa_error(FFA_NO_MEMORY); |
| 1013 | } |
| 1014 | |
| 1015 | switch (action) { |
| 1016 | case MAP_ACTION_CHECK: |
| 1017 | /* No protect requested. */ |
| 1018 | is_memory_protected = false; |
| 1019 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1020 | break; |
| 1021 | case MAP_ACTION_CHECK_PROTECT: { |
| 1022 | paddr_t last_protected_pa = pa_init(0); |
| 1023 | |
| 1024 | ret = arch_memory_protect(pa_begin, pa_end, &last_protected_pa); |
| 1025 | |
| 1026 | is_memory_protected = (ret.func == FFA_SUCCESS_32); |
| 1027 | |
| 1028 | /* |
| 1029 | * - If protect memory has failed with FFA_DENIED, means some |
| 1030 | * range of memory was in the wrong state. In such case, SPM |
| 1031 | * reverts the state of the pages that were successfully |
| 1032 | * updated. |
| 1033 | * - If protect memory has failed with FFA_NOT_SUPPORTED, it |
| 1034 | * means the platform doesn't support the protection mechanism. |
| 1035 | * That said, it still permits the page table update to go |
| 1036 | * through. The variable |
| 1037 | * `is_memory_protected` will be equal to false. |
| 1038 | * - If protect memory has failed with FFA_INVALID_PARAMETERS, |
| 1039 | * break from switch and return the error. |
| 1040 | */ |
| 1041 | if (ret.func == FFA_ERROR_32) { |
| 1042 | assert(!is_memory_protected); |
| 1043 | if (ffa_error_code(ret) == FFA_DENIED && |
| 1044 | pa_addr(last_protected_pa) != (uintptr_t)0) { |
| 1045 | CHECK(arch_memory_unprotect( |
| 1046 | pa_begin, |
| 1047 | pa_add(last_protected_pa, PAGE_SIZE))); |
| 1048 | } else if (ffa_error_code(ret) == FFA_NOT_SUPPORTED) { |
| 1049 | ret = (struct ffa_value){ |
| 1050 | .func = FFA_SUCCESS_32, |
| 1051 | }; |
| 1052 | } |
| 1053 | } |
| 1054 | } break; |
| 1055 | default: |
| 1056 | panic("%s: invalid action to process %x\n", __func__, action); |
| 1057 | } |
| 1058 | |
| 1059 | if (memory_protected != NULL) { |
| 1060 | *memory_protected = is_memory_protected; |
| 1061 | } |
| 1062 | |
| 1063 | return ret; |
| 1064 | } |
| 1065 | |
| 1066 | static void ffa_region_group_commit_actions(struct vm_locked vm_locked, |
| 1067 | paddr_t pa_begin, paddr_t pa_end, |
| 1068 | struct mpool *ppool, uint32_t mode, |
| 1069 | enum ffa_map_action action) |
| 1070 | { |
| 1071 | switch (action) { |
| 1072 | case MAP_ACTION_COMMIT_UNPROTECT: |
| 1073 | /* |
| 1074 | * Checking that it should succeed because SPM should be |
| 1075 | * unprotecting memory that it had protected before. |
| 1076 | */ |
| 1077 | CHECK(arch_memory_unprotect(pa_begin, pa_end)); |
| 1078 | case MAP_ACTION_COMMIT: |
| 1079 | vm_identity_commit(vm_locked, pa_begin, pa_end, mode, ppool, |
| 1080 | NULL); |
| 1081 | break; |
| 1082 | default: |
| 1083 | panic("%s: invalid action to process %x\n", __func__, action); |
| 1084 | } |
| 1085 | } |
| 1086 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1087 | /** |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1088 | * Helper function to revert a failed "Protect" action from the SPMC: |
| 1089 | * - `fragment_count`: should specify the number of fragments to traverse from |
| 1090 | * `fragments`. This may not be the full amount of fragments that are part of |
| 1091 | * the share_state structure. |
| 1092 | * - `fragment_constituent_counts`: array holding the amount of constituents |
| 1093 | * per fragment. |
| 1094 | * - `end`: pointer to the constituent that failed the "protect" action. It |
| 1095 | * shall be part of the last fragment, and it shall make the loop below break. |
| 1096 | */ |
| 1097 | static void ffa_region_group_fragments_revert_protect( |
| 1098 | struct ffa_memory_region_constituent **fragments, |
| 1099 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1100 | const struct ffa_memory_region_constituent *end) |
| 1101 | { |
| 1102 | for (uint32_t i = 0; i < fragment_count; ++i) { |
| 1103 | for (uint32_t j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 1104 | struct ffa_memory_region_constituent *constituent = |
| 1105 | &fragments[i][j]; |
| 1106 | size_t size = constituent->page_count * PAGE_SIZE; |
| 1107 | paddr_t pa_begin = |
| 1108 | pa_from_ipa(ipa_init(constituent->address)); |
| 1109 | paddr_t pa_end = pa_add(pa_begin, size); |
| 1110 | |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1111 | dlog_verbose("%s: reverting fragment %lx size %zx\n", |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1112 | __func__, pa_addr(pa_begin), size); |
| 1113 | |
| 1114 | if (constituent == end) { |
| 1115 | /* |
| 1116 | * The last constituent is expected to be in the |
| 1117 | * last fragment. |
| 1118 | */ |
| 1119 | assert(i == fragment_count - 1); |
| 1120 | break; |
| 1121 | } |
| 1122 | |
| 1123 | CHECK(arch_memory_unprotect(pa_begin, pa_end)); |
| 1124 | } |
| 1125 | } |
| 1126 | } |
| 1127 | |
| 1128 | /** |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1129 | * Updates a VM's page table such that the given set of physical address ranges |
| 1130 | * are mapped in the address space at the corresponding address ranges, in the |
| 1131 | * mode provided. |
| 1132 | * |
J-Alves | 0a83dc2 | 2023-05-05 09:50:37 +0100 | [diff] [blame] | 1133 | * The enum ffa_map_action determines the action taken from a call to the |
| 1134 | * function below: |
| 1135 | * - If action is MAP_ACTION_CHECK, the page tables will be allocated from the |
| 1136 | * mpool but no mappings will actually be updated. This function must always |
| 1137 | * be called first with action set to MAP_ACTION_CHECK to check that it will |
| 1138 | * succeed before calling ffa_region_group_identity_map with whichever one of |
| 1139 | * the remaining actions, to avoid leaving the page table in a half-updated |
| 1140 | * state. |
| 1141 | * - The action MAP_ACTION_COMMIT allocates the page tables from the mpool, and |
| 1142 | * changes the memory mappings. |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1143 | * - The action MAP_ACTION_CHECK_PROTECT extends the MAP_ACTION_CHECK with an |
| 1144 | * invocation to the monitor to update the security state of the memory, |
| 1145 | * to that of the SPMC. |
| 1146 | * - The action MAP_ACTION_COMMIT_UNPROTECT extends the MAP_ACTION_COMMIT |
| 1147 | * with a call into the monitor, to reset the security state of memory |
| 1148 | * that has priorly been mapped with the MAP_ACTION_CHECK_PROTECT action. |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1149 | * vm_ptable_defrag should always be called after a series of page table |
| 1150 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1151 | * |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1152 | * If all goes well, returns FFA_SUCCESS_32; or FFA_ERROR, with following |
| 1153 | * error codes: |
| 1154 | * - FFA_INVALID_PARAMETERS: invalid range of memory. |
| 1155 | * - FFA_DENIED: |
| 1156 | * |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1157 | * made to memory mappings. |
| 1158 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1159 | struct ffa_value ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 1160 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1161 | struct ffa_memory_region_constituent **fragments, |
| 1162 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1163 | uint32_t mode, struct mpool *ppool, enum ffa_map_action action, |
| 1164 | bool *memory_protected) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1165 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1166 | uint32_t i; |
| 1167 | uint32_t j; |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1168 | struct ffa_value ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1169 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1170 | if (vm_locked.vm->el0_partition) { |
| 1171 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 1172 | } |
| 1173 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1174 | /* Iterate over the memory region constituents within each fragment. */ |
| 1175 | for (i = 0; i < fragment_count; ++i) { |
| 1176 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1177 | struct ffa_memory_region_constituent *constituent = |
| 1178 | &fragments[i][j]; |
| 1179 | size_t size = constituent->page_count * PAGE_SIZE; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1180 | paddr_t pa_begin = |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1181 | pa_from_ipa(ipa_init(constituent->address)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1182 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 1183 | uint32_t pa_bits = |
| 1184 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1185 | |
| 1186 | /* |
| 1187 | * Ensure the requested region falls into system's PA |
| 1188 | * range. |
| 1189 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 1190 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 1191 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1192 | dlog_error("Region is outside of PA Range\n"); |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1193 | return ffa_error(FFA_INVALID_PARAMETERS); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 1194 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1195 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1196 | if (action <= MAP_ACTION_CHECK_PROTECT) { |
| 1197 | ret = ffa_region_group_check_actions( |
| 1198 | vm_locked, pa_begin, pa_end, ppool, |
| 1199 | mode, action, memory_protected); |
J-Alves | 063ad83 | 2023-10-03 18:05:40 +0100 | [diff] [blame] | 1200 | |
| 1201 | if (ret.func == FFA_ERROR_32 && |
| 1202 | ffa_error_code(ret) == FFA_DENIED) { |
| 1203 | if (memory_protected != NULL) { |
| 1204 | assert(!*memory_protected); |
| 1205 | } |
| 1206 | |
| 1207 | ffa_region_group_fragments_revert_protect( |
| 1208 | fragments, |
| 1209 | fragment_constituent_counts, |
| 1210 | i + 1, constituent); |
| 1211 | break; |
| 1212 | } |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1213 | } else if (action >= MAP_ACTION_COMMIT && |
| 1214 | action < MAP_ACTION_MAX) { |
| 1215 | ffa_region_group_commit_actions( |
| 1216 | vm_locked, pa_begin, pa_end, ppool, |
| 1217 | mode, action); |
| 1218 | ret = (struct ffa_value){ |
| 1219 | .func = FFA_SUCCESS_32}; |
| 1220 | } else { |
| 1221 | panic("%s: Unknown ffa_map_action.\n", |
| 1222 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1223 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1224 | } |
| 1225 | } |
| 1226 | |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1227 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1228 | } |
| 1229 | |
| 1230 | /** |
| 1231 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 1232 | * flushed from the cache so the memory has been cleared across the system. |
| 1233 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1234 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 1235 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1236 | { |
| 1237 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 1238 | * 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] | 1239 | * global mapping of the whole range. Such an approach will limit |
| 1240 | * the changes to stage-1 tables and will allow only local |
| 1241 | * invalidation. |
| 1242 | */ |
| 1243 | bool ret; |
| 1244 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1245 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 1246 | MM_MODE_W | (extra_mode_attributes & |
| 1247 | plat_ffa_other_world_mode()), |
| 1248 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1249 | size_t size = pa_difference(begin, end); |
| 1250 | |
| 1251 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1252 | goto fail; |
| 1253 | } |
| 1254 | |
| 1255 | memset_s(ptr, size, 0, size); |
| 1256 | arch_mm_flush_dcache(ptr, size); |
| 1257 | mm_unmap(stage1_locked, begin, end, ppool); |
| 1258 | |
| 1259 | ret = true; |
| 1260 | goto out; |
| 1261 | |
| 1262 | fail: |
| 1263 | ret = false; |
| 1264 | |
| 1265 | out: |
| 1266 | mm_unlock_stage1(&stage1_locked); |
| 1267 | |
| 1268 | return ret; |
| 1269 | } |
| 1270 | |
| 1271 | /** |
| 1272 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 1273 | * flushed from the cache so the memory has been cleared across the system. |
| 1274 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1275 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1276 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1277 | struct ffa_memory_region_constituent **fragments, |
| 1278 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1279 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1280 | { |
| 1281 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1282 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1283 | bool ret = false; |
| 1284 | |
| 1285 | /* |
| 1286 | * Create a local pool so any freed memory can't be used by another |
| 1287 | * thread. This is to ensure each constituent that is mapped can be |
| 1288 | * unmapped again afterwards. |
| 1289 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1290 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1291 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1292 | /* Iterate over the memory region constituents within each fragment. */ |
| 1293 | for (i = 0; i < fragment_count; ++i) { |
| 1294 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1295 | |
J-Alves | 8457f93 | 2023-10-11 16:41:45 +0100 | [diff] [blame] | 1296 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1297 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 1298 | paddr_t begin = |
| 1299 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 1300 | paddr_t end = pa_add(begin, size); |
| 1301 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1302 | if (!clear_memory(begin, end, &local_page_pool, |
| 1303 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1304 | /* |
| 1305 | * api_clear_memory will defrag on failure, so |
| 1306 | * no need to do it here. |
| 1307 | */ |
| 1308 | goto out; |
| 1309 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1310 | } |
| 1311 | } |
| 1312 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1313 | ret = true; |
| 1314 | |
| 1315 | out: |
| 1316 | mpool_fini(&local_page_pool); |
| 1317 | return ret; |
| 1318 | } |
| 1319 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1320 | static bool is_memory_range_within(ipaddr_t begin, ipaddr_t end, |
| 1321 | ipaddr_t in_begin, ipaddr_t in_end) |
| 1322 | { |
| 1323 | return (ipa_addr(begin) >= ipa_addr(in_begin) && |
| 1324 | ipa_addr(begin) < ipa_addr(in_end)) || |
| 1325 | (ipa_addr(end) <= ipa_addr(in_end) && |
| 1326 | ipa_addr(end) > ipa_addr(in_begin)); |
| 1327 | } |
| 1328 | |
| 1329 | /** |
| 1330 | * Receives a memory range and looks for overlaps with the remainder |
| 1331 | * constituents of the memory share/lend/donate operation. Assumes they are |
| 1332 | * passed in order to avoid having to loop over all the elements at each call. |
| 1333 | * The function only compares the received memory ranges with those that follow |
| 1334 | * within the same fragment, and subsequent fragments from the same operation. |
| 1335 | */ |
| 1336 | static bool ffa_memory_check_overlap( |
| 1337 | struct ffa_memory_region_constituent **fragments, |
| 1338 | const uint32_t *fragment_constituent_counts, |
| 1339 | const uint32_t fragment_count, const uint32_t current_fragment, |
| 1340 | const uint32_t current_constituent) |
| 1341 | { |
| 1342 | uint32_t i = current_fragment; |
| 1343 | uint32_t j = current_constituent; |
| 1344 | ipaddr_t current_begin = ipa_init(fragments[i][j].address); |
| 1345 | const uint32_t current_page_count = fragments[i][j].page_count; |
| 1346 | size_t current_size = current_page_count * PAGE_SIZE; |
| 1347 | ipaddr_t current_end = ipa_add(current_begin, current_size - 1); |
| 1348 | |
| 1349 | if (current_size == 0 || |
| 1350 | current_size > UINT64_MAX - ipa_addr(current_begin)) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1351 | dlog_verbose("Invalid page count. Addr: %zx page_count: %x\n", |
| 1352 | current_begin.ipa, current_page_count); |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1353 | return false; |
| 1354 | } |
| 1355 | |
| 1356 | for (; i < fragment_count; i++) { |
| 1357 | j = (i == current_fragment) ? j + 1 : 0; |
| 1358 | |
| 1359 | for (; j < fragment_constituent_counts[i]; j++) { |
| 1360 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 1361 | const uint32_t page_count = fragments[i][j].page_count; |
| 1362 | size_t size = page_count * PAGE_SIZE; |
| 1363 | ipaddr_t end = ipa_add(begin, size - 1); |
| 1364 | |
| 1365 | if (size == 0 || size > UINT64_MAX - ipa_addr(begin)) { |
| 1366 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1367 | "Invalid page count. Addr: %lx " |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1368 | "page_count: %x\n", |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1369 | begin.ipa, page_count); |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1370 | return false; |
| 1371 | } |
| 1372 | |
| 1373 | /* |
| 1374 | * Check if current ranges is within begin and end, as |
| 1375 | * well as the reverse. This should help optimize the |
| 1376 | * loop, and reduce the number of iterations. |
| 1377 | */ |
| 1378 | if (is_memory_range_within(begin, end, current_begin, |
| 1379 | current_end) || |
| 1380 | is_memory_range_within(current_begin, current_end, |
| 1381 | begin, end)) { |
| 1382 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1383 | "Overlapping memory ranges: %#lx - " |
| 1384 | "%#lx with %#lx - %#lx\n", |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1385 | ipa_addr(begin), ipa_addr(end), |
| 1386 | ipa_addr(current_begin), |
| 1387 | ipa_addr(current_end)); |
| 1388 | return true; |
| 1389 | } |
| 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | return false; |
| 1394 | } |
| 1395 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1396 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1397 | * 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] | 1398 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1399 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1400 | * |
| 1401 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1402 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1403 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1404 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1405 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 1406 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1407 | * 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] | 1408 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1409 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1410 | */ |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1411 | static struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1412 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1413 | struct ffa_memory_region_constituent **fragments, |
| 1414 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1415 | uint32_t composite_total_page_count, uint32_t share_func, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1416 | struct ffa_memory_region *memory_region, struct mpool *page_pool, |
| 1417 | uint32_t *orig_from_mode_ret, bool *memory_protected) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1418 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1419 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1420 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1421 | uint32_t orig_from_mode; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1422 | uint32_t clean_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1423 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1424 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1425 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1426 | uint32_t constituents_total_page_count = 0; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1427 | enum ffa_map_action map_action = MAP_ACTION_CHECK; |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1428 | bool clear = memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1429 | |
| 1430 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1431 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1432 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1433 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1434 | for (i = 0; i < fragment_count; ++i) { |
| 1435 | if (!is_aligned(fragments[i], 8)) { |
| 1436 | dlog_verbose("Constituents not aligned.\n"); |
| 1437 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1438 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1439 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 1440 | constituents_total_page_count += |
| 1441 | fragments[i][j].page_count; |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1442 | if (ffa_memory_check_overlap( |
| 1443 | fragments, fragment_constituent_counts, |
| 1444 | fragment_count, i, j)) { |
| 1445 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1446 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | if (constituents_total_page_count != composite_total_page_count) { |
| 1451 | dlog_verbose( |
| 1452 | "Composite page count differs from calculated page " |
| 1453 | "count from constituents.\n"); |
| 1454 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1455 | } |
| 1456 | |
| 1457 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1458 | * Check if the state transition is lawful for the sender, ensure that |
| 1459 | * all constituents of a memory region being shared are at the same |
| 1460 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1461 | */ |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1462 | ret = ffa_send_check_transition( |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1463 | from_locked, share_func, memory_region, &orig_from_mode, |
| 1464 | fragments, fragment_constituent_counts, fragment_count, |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 1465 | &from_mode, &map_action, clear); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1466 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1467 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1468 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1469 | } |
| 1470 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1471 | if (orig_from_mode_ret != NULL) { |
| 1472 | *orig_from_mode_ret = orig_from_mode; |
| 1473 | } |
| 1474 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1475 | /* |
| 1476 | * Create a local pool so any freed memory can't be used by another |
| 1477 | * thread. This is to ensure the original mapping can be restored if the |
| 1478 | * clear fails. |
| 1479 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1480 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1481 | |
| 1482 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1483 | * First reserve all required memory for the new page table entries |
| 1484 | * without committing, to make sure the entire operation will succeed |
| 1485 | * without exhausting the page pool. |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1486 | * Provide the map_action as populated by 'ffa_send_check_transition'. |
| 1487 | * It may request memory to be protected. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1488 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1489 | ret = ffa_region_group_identity_map( |
| 1490 | from_locked, fragments, fragment_constituent_counts, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1491 | fragment_count, from_mode, page_pool, map_action, |
| 1492 | memory_protected); |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1493 | if (ret.func == FFA_ERROR_32) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1494 | goto out; |
| 1495 | } |
| 1496 | |
| 1497 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1498 | * Update the mapping for the sender. This won't allocate because the |
| 1499 | * transaction was already prepared above, but may free pages in the |
| 1500 | * case that a whole block is being unmapped that was previously |
| 1501 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1502 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1503 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1504 | from_locked, fragments, fragment_constituent_counts, |
| 1505 | fragment_count, from_mode, &local_page_pool, |
| 1506 | MAP_ACTION_COMMIT, NULL) |
| 1507 | .func == FFA_SUCCESS_32); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1508 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1509 | /* |
| 1510 | * If memory has been protected, it is now part of the secure PAS |
| 1511 | * (happens for lend/donate from NWd to SWd), and the `orig_from_mode` |
| 1512 | * should have the MM_MODE_NS set, as such mask it in `clean_mode` for |
| 1513 | * SPM's S1 translation. |
| 1514 | * In case memory hasn't been protected, and it is in the non-secure |
| 1515 | * PAS (e.g. memory share from NWd to SWd), as such the SPM needs to |
| 1516 | * perform a non-secure memory access. In such case `clean_mode` takes |
| 1517 | * the same mode as `orig_from_mode`. |
| 1518 | */ |
| 1519 | clean_mode = (memory_protected != NULL && *memory_protected) |
| 1520 | ? orig_from_mode & ~plat_ffa_other_world_mode() |
| 1521 | : orig_from_mode; |
| 1522 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1523 | /* 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] | 1524 | if (clear && !ffa_clear_memory_constituents( |
| 1525 | clean_mode, fragments, fragment_constituent_counts, |
| 1526 | fragment_count, page_pool)) { |
| 1527 | map_action = (memory_protected != NULL && *memory_protected) |
| 1528 | ? MAP_ACTION_COMMIT_UNPROTECT |
| 1529 | : MAP_ACTION_COMMIT; |
| 1530 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1531 | /* |
| 1532 | * On failure, roll back by returning memory to the sender. This |
| 1533 | * may allocate pages which were previously freed into |
| 1534 | * `local_page_pool` by the call above, but will never allocate |
| 1535 | * more pages than that so can never fail. |
| 1536 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1537 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1538 | from_locked, fragments, |
| 1539 | fragment_constituent_counts, fragment_count, |
| 1540 | orig_from_mode, &local_page_pool, |
| 1541 | MAP_ACTION_COMMIT, NULL) |
| 1542 | .func == FFA_SUCCESS_32); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1543 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1544 | goto out; |
| 1545 | } |
| 1546 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1547 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1548 | |
| 1549 | out: |
| 1550 | mpool_fini(&local_page_pool); |
| 1551 | |
| 1552 | /* |
| 1553 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1554 | * error) or merging entries into blocks where possible (on success). |
| 1555 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1556 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1557 | |
| 1558 | return ret; |
| 1559 | } |
| 1560 | |
| 1561 | /** |
| 1562 | * Validates and maps memory shared from one VM to another. |
| 1563 | * |
| 1564 | * This function requires the calling context to hold the <to> lock. |
| 1565 | * |
| 1566 | * Returns: |
| 1567 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1568 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1569 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1570 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1571 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1572 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1573 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1574 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1575 | struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1576 | struct ffa_memory_region_constituent **fragments, |
| 1577 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1578 | uint32_t sender_orig_mode, uint32_t share_func, bool clear, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1579 | struct mpool *page_pool, uint32_t *response_mode, bool memory_protected) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1580 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1581 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1582 | uint32_t to_mode; |
| 1583 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1584 | struct ffa_value ret; |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 1585 | enum ffa_map_action map_action = MAP_ACTION_COMMIT; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1586 | |
| 1587 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1588 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1589 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1590 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1591 | for (i = 0; i < fragment_count; ++i) { |
| 1592 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1593 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1594 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1595 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | /* |
Daniel Boulby | 4b846eb | 2024-05-23 17:32:23 +0100 | [diff] [blame] | 1599 | * Ensure the sender has write permissions if the memory needs to be |
| 1600 | * cleared. |
| 1601 | */ |
| 1602 | if ((sender_orig_mode & MM_MODE_W) == 0 && clear == true) { |
| 1603 | dlog_verbose( |
| 1604 | "Cannot zero memory when the sender does not have " |
| 1605 | "write access\n"); |
| 1606 | return ffa_error(FFA_DENIED); |
| 1607 | } |
| 1608 | |
| 1609 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1610 | * Check if the state transition is lawful for the recipient, and ensure |
| 1611 | * that all constituents of the memory region being retrieved are at the |
| 1612 | * same state. |
| 1613 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1614 | ret = ffa_retrieve_check_transition( |
| 1615 | to_locked, share_func, fragments, fragment_constituent_counts, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 1616 | fragment_count, sender_orig_mode, &to_mode, memory_protected, |
| 1617 | &map_action); |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1618 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1619 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1620 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1621 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Create a local pool so any freed memory can't be used by another |
| 1626 | * thread. This is to ensure the original mapping can be restored if the |
| 1627 | * clear fails. |
| 1628 | */ |
| 1629 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1630 | |
| 1631 | /* |
| 1632 | * First reserve all required memory for the new page table entries in |
| 1633 | * the recipient page tables without committing, to make sure the entire |
| 1634 | * operation will succeed without exhausting the page pool. |
| 1635 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1636 | ret = ffa_region_group_identity_map( |
| 1637 | to_locked, fragments, fragment_constituent_counts, |
| 1638 | fragment_count, to_mode, page_pool, MAP_ACTION_CHECK, NULL); |
| 1639 | if (ret.func == FFA_ERROR_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1640 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1641 | goto out; |
| 1642 | } |
| 1643 | |
| 1644 | /* 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] | 1645 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1646 | !ffa_clear_memory_constituents(sender_orig_mode, fragments, |
| 1647 | fragment_constituent_counts, |
| 1648 | fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1649 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1650 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1651 | goto out; |
| 1652 | } |
| 1653 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1654 | /* |
| 1655 | * Complete the transfer by mapping the memory into the recipient. This |
| 1656 | * won't allocate because the transaction was already prepared above, so |
| 1657 | * it doesn't need to use the `local_page_pool`. |
| 1658 | */ |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 1659 | CHECK(ffa_region_group_identity_map( |
| 1660 | to_locked, fragments, fragment_constituent_counts, |
| 1661 | fragment_count, to_mode, page_pool, map_action, NULL) |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1662 | .func == FFA_SUCCESS_32); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1663 | |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1664 | /* Return the mode used in mapping the memory in retriever's PT. */ |
| 1665 | if (response_mode != NULL) { |
| 1666 | *response_mode = to_mode; |
| 1667 | } |
| 1668 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1669 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1670 | |
| 1671 | out: |
| 1672 | mpool_fini(&local_page_pool); |
| 1673 | |
| 1674 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1675 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1676 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1677 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1678 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1679 | |
| 1680 | return ret; |
| 1681 | } |
| 1682 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1683 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1684 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1685 | struct ffa_memory_region_constituent **fragments, |
| 1686 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1687 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1688 | { |
| 1689 | uint32_t orig_from_mode; |
| 1690 | uint32_t from_mode; |
| 1691 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1692 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1693 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1694 | ret = ffa_relinquish_check_transition( |
| 1695 | from_locked, &orig_from_mode, fragments, |
| 1696 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1697 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1698 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1699 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1700 | } |
| 1701 | |
| 1702 | /* |
| 1703 | * Create a local pool so any freed memory can't be used by another |
| 1704 | * thread. This is to ensure the original mapping can be restored if the |
| 1705 | * clear fails. |
| 1706 | */ |
| 1707 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1708 | |
| 1709 | /* |
| 1710 | * First reserve all required memory for the new page table entries |
| 1711 | * without committing, to make sure the entire operation will succeed |
| 1712 | * without exhausting the page pool. |
| 1713 | */ |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1714 | ret = ffa_region_group_identity_map( |
| 1715 | from_locked, fragments, fragment_constituent_counts, |
| 1716 | fragment_count, from_mode, page_pool, MAP_ACTION_CHECK, NULL); |
| 1717 | if (ret.func == FFA_ERROR_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1718 | goto out; |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * Update the mapping for the sender. This won't allocate because the |
| 1723 | * transaction was already prepared above, but may free pages in the |
| 1724 | * case that a whole block is being unmapped that was previously |
| 1725 | * partially mapped. |
| 1726 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1727 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1728 | from_locked, fragments, fragment_constituent_counts, |
| 1729 | fragment_count, from_mode, &local_page_pool, |
| 1730 | MAP_ACTION_COMMIT, NULL) |
| 1731 | .func == FFA_SUCCESS_32); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1732 | |
| 1733 | /* 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] | 1734 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1735 | !ffa_clear_memory_constituents(orig_from_mode, fragments, |
| 1736 | fragment_constituent_counts, |
| 1737 | fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1738 | /* |
| 1739 | * On failure, roll back by returning memory to the sender. This |
| 1740 | * may allocate pages which were previously freed into |
| 1741 | * `local_page_pool` by the call above, but will never allocate |
| 1742 | * more pages than that so can never fail. |
| 1743 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1744 | CHECK(ffa_region_group_identity_map( |
J-Alves | cf6253e | 2024-01-03 13:48:48 +0000 | [diff] [blame] | 1745 | from_locked, fragments, |
| 1746 | fragment_constituent_counts, fragment_count, |
| 1747 | orig_from_mode, &local_page_pool, |
| 1748 | MAP_ACTION_COMMIT, NULL) |
| 1749 | .func == FFA_SUCCESS_32); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1750 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1751 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1752 | goto out; |
| 1753 | } |
| 1754 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1755 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1756 | |
| 1757 | out: |
| 1758 | mpool_fini(&local_page_pool); |
| 1759 | |
| 1760 | /* |
| 1761 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1762 | * error) or merging entries into blocks where possible (on success). |
| 1763 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1764 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1765 | |
| 1766 | return ret; |
| 1767 | } |
| 1768 | |
| 1769 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1770 | * Complete a memory sending operation by checking that it is valid, updating |
| 1771 | * the sender page table, and then either marking the share state as having |
| 1772 | * completed sending (on success) or freeing it (on failure). |
| 1773 | * |
| 1774 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1775 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1776 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1777 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1778 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1779 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1780 | { |
| 1781 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1782 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1783 | struct ffa_value ret; |
| 1784 | |
| 1785 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1786 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1787 | assert(memory_region != NULL); |
| 1788 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1789 | assert(composite != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1790 | |
| 1791 | /* Check that state is valid in sender page table and update. */ |
| 1792 | ret = ffa_send_check_update( |
| 1793 | from_locked, share_state->fragments, |
| 1794 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1795 | share_state->fragment_count, composite->page_count, |
Daniel Boulby | a76fd91 | 2024-02-22 14:22:15 +0000 | [diff] [blame] | 1796 | share_state->share_func, memory_region, page_pool, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 1797 | orig_from_mode_ret, &share_state->memory_protected); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1798 | if (ret.func != FFA_SUCCESS_32) { |
| 1799 | /* |
| 1800 | * Free share state, it failed to send so it can't be retrieved. |
| 1801 | */ |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1802 | dlog_verbose("%s: failed to send check update: %s(%s)\n", |
| 1803 | __func__, ffa_func_name(ret.func), |
| 1804 | ffa_error_name(ffa_error_code(ret))); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1805 | share_state_free(share_states, share_state, page_pool); |
| 1806 | return ret; |
| 1807 | } |
| 1808 | |
| 1809 | share_state->sending_complete = true; |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1810 | dlog_verbose("%s: marked sending complete.\n", __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1811 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1812 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1813 | } |
| 1814 | |
| 1815 | /** |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1816 | * Check that the memory attributes match Hafnium expectations. |
| 1817 | * Cacheability: |
| 1818 | * - Normal Memory as `FFA_MEMORY_CACHE_WRITE_BACK`. |
| 1819 | * - Device memory as `FFA_MEMORY_DEV_NGNRNE`. |
| 1820 | * |
| 1821 | * Shareability: |
| 1822 | * - Inner Shareable. |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1823 | */ |
| 1824 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1825 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1826 | { |
| 1827 | enum ffa_memory_type memory_type; |
| 1828 | enum ffa_memory_cacheability cacheability; |
| 1829 | enum ffa_memory_shareability shareability; |
| 1830 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 1831 | memory_type = attributes.type; |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1832 | cacheability = attributes.cacheability; |
| 1833 | if (memory_type == FFA_MEMORY_NORMAL_MEM && |
| 1834 | cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1835 | dlog_verbose( |
| 1836 | "Normal Memory: Invalid cacheability %s, " |
| 1837 | "expected %s.\n", |
| 1838 | ffa_memory_cacheability_name(cacheability), |
| 1839 | ffa_memory_cacheability_name( |
| 1840 | FFA_MEMORY_CACHE_WRITE_BACK)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1841 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1842 | } |
Daniel Boulby | 9764ff6 | 2024-01-30 17:47:39 +0000 | [diff] [blame] | 1843 | if (memory_type == FFA_MEMORY_DEVICE_MEM && |
| 1844 | cacheability != FFA_MEMORY_DEV_NGNRNE) { |
| 1845 | dlog_verbose( |
| 1846 | "Device Memory: Invalid cacheability %s, " |
| 1847 | "expected %s.\n", |
| 1848 | ffa_device_memory_cacheability_name(cacheability), |
| 1849 | ffa_device_memory_cacheability_name( |
| 1850 | FFA_MEMORY_DEV_NGNRNE)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1851 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1852 | } |
| 1853 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 1854 | shareability = attributes.shareability; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1855 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 1856 | dlog_verbose("Invalid shareability %s, expected %s.\n", |
| 1857 | ffa_memory_shareability_name(shareability), |
| 1858 | ffa_memory_shareability_name( |
| 1859 | FFA_MEMORY_INNER_SHAREABLE)); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1860 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1861 | } |
| 1862 | |
| 1863 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1864 | } |
| 1865 | |
| 1866 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1867 | * Check that the given `memory_region` represents a valid memory send request |
| 1868 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1869 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1870 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1871 | * 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] | 1872 | * not. |
| 1873 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1874 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1875 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1876 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1877 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1878 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1879 | struct ffa_composite_memory_region *composite; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1880 | struct ffa_memory_access *receiver = |
| 1881 | ffa_memory_region_get_receiver(memory_region, 0); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1882 | uint64_t receivers_end; |
| 1883 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1884 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1885 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1886 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1887 | enum ffa_data_access data_access; |
| 1888 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1889 | enum ffa_memory_security security_state; |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 1890 | enum ffa_memory_type type; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1891 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1892 | const size_t minimum_first_fragment_length = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1893 | memory_region->receivers_offset + |
| 1894 | memory_region->memory_access_desc_size + |
| 1895 | sizeof(struct ffa_composite_memory_region); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1896 | |
| 1897 | if (fragment_length < minimum_first_fragment_length) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1898 | dlog_verbose("Fragment length %u too short (min %zu).\n", |
| 1899 | fragment_length, minimum_first_fragment_length); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1900 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1901 | } |
| 1902 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1903 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1904 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1905 | if (!is_aligned(fragment_length, |
| 1906 | sizeof(struct ffa_memory_region_constituent)) || |
| 1907 | !is_aligned(memory_share_length, |
| 1908 | sizeof(struct ffa_memory_region_constituent))) { |
| 1909 | dlog_verbose( |
| 1910 | "Fragment length %u or total length %u" |
| 1911 | " is not 16-byte aligned.\n", |
| 1912 | fragment_length, memory_share_length); |
| 1913 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1914 | } |
| 1915 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1916 | if (fragment_length > memory_share_length) { |
| 1917 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1918 | "Fragment length %zu greater than total length %zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1919 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1920 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1921 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1922 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1923 | /* The sender must match the caller. */ |
| 1924 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1925 | vm_id_is_current_world(memory_region->sender)) || |
| 1926 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1927 | memory_region->sender != from_locked.vm->id)) { |
| 1928 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1929 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1930 | } |
| 1931 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1932 | if (memory_region->receiver_count <= 0) { |
| 1933 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1934 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1935 | } |
| 1936 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1937 | /* |
| 1938 | * Ensure that the composite header is within the memory bounds and |
| 1939 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 1940 | * to prevent overflow. |
| 1941 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1942 | receivers_end = ((uint64_t)memory_region->memory_access_desc_size * |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1943 | (uint64_t)memory_region->receiver_count) + |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1944 | memory_region->receivers_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1945 | min_length = receivers_end + |
| 1946 | sizeof(struct ffa_composite_memory_region) + |
| 1947 | sizeof(struct ffa_memory_region_constituent); |
| 1948 | if (min_length > memory_share_length) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1949 | 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] | 1950 | (size_t)memory_share_length, (size_t)min_length); |
| 1951 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1952 | } |
| 1953 | |
| 1954 | composite_memory_region_offset = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1955 | receiver->composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1956 | |
| 1957 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1958 | * Check that the composite memory region descriptor is after the access |
| 1959 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 1960 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1961 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1962 | if ((composite_memory_region_offset < receivers_end) || |
| 1963 | (composite_memory_region_offset % 16 != 0) || |
| 1964 | (composite_memory_region_offset > |
| 1965 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 1966 | dlog_verbose( |
| 1967 | "Invalid composite memory region descriptor offset " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1968 | "%zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1969 | (size_t)composite_memory_region_offset); |
| 1970 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1971 | } |
| 1972 | |
| 1973 | /* |
| 1974 | * Compute the start of the constituent regions. Already checked |
| 1975 | * to be not more than fragment_length and thus not more than |
| 1976 | * memory_share_length. |
| 1977 | */ |
| 1978 | constituents_start = composite_memory_region_offset + |
| 1979 | sizeof(struct ffa_composite_memory_region); |
| 1980 | constituents_length = memory_share_length - constituents_start; |
| 1981 | |
| 1982 | /* |
| 1983 | * Check that the number of constituents is consistent with the length |
| 1984 | * of the constituent region. |
| 1985 | */ |
| 1986 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1987 | if ((constituents_length % |
| 1988 | sizeof(struct ffa_memory_region_constituent) != |
| 1989 | 0) || |
| 1990 | ((constituents_length / |
| 1991 | sizeof(struct ffa_memory_region_constituent)) != |
| 1992 | composite->constituent_count)) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 1993 | dlog_verbose("Invalid length %zu or composite offset %zu.\n", |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1994 | (size_t)memory_share_length, |
| 1995 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1996 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1997 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1998 | if (fragment_length < memory_share_length && |
| 1999 | fragment_length < HF_MAILBOX_SIZE) { |
| 2000 | dlog_warning( |
| 2001 | "Initial fragment length %d smaller than mailbox " |
| 2002 | "size.\n", |
| 2003 | fragment_length); |
| 2004 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2005 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2006 | /* |
| 2007 | * Clear is not allowed for memory sharing, as the sender still has |
| 2008 | * access to the memory. |
| 2009 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2010 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2011 | (share_func == FFA_MEM_SHARE_32 || |
| 2012 | share_func == FFA_MEM_SHARE_64)) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2013 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2014 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2015 | } |
| 2016 | |
| 2017 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2018 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2019 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2020 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2021 | } |
| 2022 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2023 | /* Check that the permissions are valid, for each specified receiver. */ |
| 2024 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2025 | struct ffa_memory_region_attributes receiver_permissions; |
| 2026 | |
| 2027 | receiver = ffa_memory_region_get_receiver(memory_region, i); |
| 2028 | assert(receiver != NULL); |
| 2029 | receiver_permissions = receiver->receiver_permissions; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2030 | ffa_memory_access_permissions_t permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2031 | receiver_permissions.permissions; |
| 2032 | ffa_id_t receiver_id = receiver_permissions.receiver; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2033 | |
| 2034 | if (memory_region->sender == receiver_id) { |
| 2035 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2036 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2037 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 2038 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2039 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 2040 | j++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2041 | struct ffa_memory_access *other_receiver = |
| 2042 | ffa_memory_region_get_receiver(memory_region, |
| 2043 | j); |
| 2044 | assert(other_receiver != NULL); |
| 2045 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2046 | if (receiver_id == |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2047 | other_receiver->receiver_permissions.receiver) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2048 | dlog_verbose( |
| 2049 | "Repeated receiver(%x) in memory send " |
| 2050 | "operation.\n", |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2051 | other_receiver->receiver_permissions |
| 2052 | .receiver); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2053 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2054 | } |
| 2055 | } |
| 2056 | |
| 2057 | if (composite_memory_region_offset != |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2058 | receiver->composite_memory_region_offset) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2059 | dlog_verbose( |
| 2060 | "All ffa_memory_access should point to the " |
| 2061 | "same composite memory region offset.\n"); |
| 2062 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2063 | } |
| 2064 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2065 | data_access = permissions.data_access; |
| 2066 | instruction_access = permissions.instruction_access; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2067 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 2068 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 2069 | dlog_verbose( |
| 2070 | "Reserved value for receiver permissions " |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2071 | "(data_access = %s, instruction_access = %s)\n", |
| 2072 | ffa_data_access_name(data_access), |
| 2073 | ffa_instruction_access_name( |
| 2074 | instruction_access)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2075 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2076 | } |
| 2077 | if (instruction_access != |
| 2078 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2079 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2080 | "Invalid instruction access permissions %s " |
| 2081 | "for sending memory, expected %s.\n", |
| 2082 | ffa_instruction_access_name(instruction_access), |
| 2083 | ffa_instruction_access_name( |
| 2084 | FFA_INSTRUCTION_ACCESS_RESERVED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2085 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2086 | } |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2087 | if (share_func == FFA_MEM_SHARE_32 || |
| 2088 | share_func == FFA_MEM_SHARE_64) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2089 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2090 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2091 | "Invalid data access permissions %s " |
| 2092 | "for sharing memory, expected %s.\n", |
| 2093 | ffa_data_access_name(data_access), |
| 2094 | ffa_data_access_name( |
| 2095 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2096 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2097 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2098 | /* |
| 2099 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 2100 | * spec, NX is required for share operations (but must |
| 2101 | * not be specified by the sender) so set it in the |
| 2102 | * copy that we store, ready to be returned to the |
| 2103 | * retriever. |
| 2104 | */ |
| 2105 | if (vm_id_is_current_world(receiver_id)) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2106 | permissions.instruction_access = |
| 2107 | FFA_INSTRUCTION_ACCESS_NX; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2108 | receiver_permissions.permissions = permissions; |
| 2109 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2110 | } |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2111 | if ((share_func == FFA_MEM_LEND_32 || |
| 2112 | share_func == FFA_MEM_LEND_64) && |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2113 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2114 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2115 | "Invalid data access permissions %s for " |
| 2116 | "lending memory, expected %s.\n", |
| 2117 | ffa_data_access_name(data_access), |
| 2118 | ffa_data_access_name( |
| 2119 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2120 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2121 | } |
| 2122 | |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2123 | if ((share_func == FFA_MEM_DONATE_32 || |
| 2124 | share_func == FFA_MEM_DONATE_64) && |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2125 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 2126 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2127 | "Invalid data access permissions %s for " |
| 2128 | "donating memory, expected %s.\n", |
| 2129 | ffa_data_access_name(data_access), |
| 2130 | ffa_data_access_name( |
| 2131 | FFA_DATA_ACCESS_NOT_SPECIFIED)); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2132 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2133 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2134 | } |
| 2135 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2136 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2137 | security_state = memory_region->attributes.security; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2138 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2139 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2140 | "Invalid security state %s for memory share operation, " |
| 2141 | "expected %s.\n", |
| 2142 | ffa_memory_security_name(security_state), |
| 2143 | ffa_memory_security_name( |
| 2144 | FFA_MEMORY_SECURITY_UNSPECIFIED)); |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2145 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2146 | } |
| 2147 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2148 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2149 | * If a memory donate or lend with single borrower, the memory type |
| 2150 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2151 | */ |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2152 | type = memory_region->attributes.type; |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2153 | if (share_func == FFA_MEM_DONATE_32 || |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2154 | share_func == FFA_MEM_DONATE_64 || |
| 2155 | ((share_func == FFA_MEM_LEND_32 || share_func == FFA_MEM_LEND_64) && |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2156 | memory_region->receiver_count == 1)) { |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2157 | if (type != FFA_MEMORY_NOT_SPECIFIED_MEM) { |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2158 | dlog_verbose( |
Karl Meakin | f98b2aa | 2023-10-12 16:09:59 +0100 | [diff] [blame] | 2159 | "Invalid memory type %s for memory share " |
| 2160 | "operation, expected %s.\n", |
| 2161 | ffa_memory_type_name(type), |
| 2162 | ffa_memory_type_name( |
| 2163 | FFA_MEMORY_NOT_SPECIFIED_MEM)); |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 2164 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2165 | } |
| 2166 | } else { |
| 2167 | /* |
| 2168 | * Check that sender's memory attributes match Hafnium |
| 2169 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 2170 | * Read-Allocate Write-Allocate Cacheable. |
| 2171 | */ |
| 2172 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 2173 | if (ret.func != FFA_SUCCESS_32) { |
| 2174 | return ret; |
| 2175 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 2176 | } |
| 2177 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2178 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2179 | } |
| 2180 | |
| 2181 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2182 | * Gets the share state for continuing an operation to donate, lend or share |
| 2183 | * memory, and checks that it is a valid request. |
| 2184 | * |
| 2185 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 2186 | * not. |
| 2187 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2188 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2189 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2190 | 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] | 2191 | struct mpool *page_pool) |
| 2192 | { |
| 2193 | struct ffa_memory_share_state *share_state; |
| 2194 | struct ffa_memory_region *memory_region; |
| 2195 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 2196 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2197 | |
| 2198 | /* |
| 2199 | * Look up the share state by handle and make sure that the VM ID |
| 2200 | * matches. |
| 2201 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 2202 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 2203 | if (share_state == NULL) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2204 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2205 | "Invalid handle %#lx for memory send continuation.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2206 | handle); |
| 2207 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2208 | } |
| 2209 | memory_region = share_state->memory_region; |
| 2210 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2211 | if (vm_id_is_current_world(from_vm_id) && |
| 2212 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2213 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 2214 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2215 | } |
| 2216 | |
| 2217 | if (share_state->sending_complete) { |
| 2218 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2219 | "Sending of memory handle %#lx is already complete.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2220 | handle); |
| 2221 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2222 | } |
| 2223 | |
| 2224 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 2225 | /* |
| 2226 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 2227 | * probably be increased. |
| 2228 | */ |
| 2229 | dlog_warning( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2230 | "Too many fragments for memory share with handle %#lx; " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2231 | "only %d supported.\n", |
| 2232 | handle, MAX_FRAGMENTS); |
| 2233 | /* Free share state, as it's not possible to complete it. */ |
| 2234 | share_state_free(share_states, share_state, page_pool); |
| 2235 | return ffa_error(FFA_NO_MEMORY); |
| 2236 | } |
| 2237 | |
| 2238 | *share_state_ret = share_state; |
| 2239 | |
| 2240 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2241 | } |
| 2242 | |
| 2243 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2244 | * Checks if there is at least one receiver from the other world. |
| 2245 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2246 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2247 | struct ffa_memory_region *memory_region) |
| 2248 | { |
| 2249 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2250 | struct ffa_memory_access *receiver = |
| 2251 | ffa_memory_region_get_receiver(memory_region, i); |
| 2252 | assert(receiver != NULL); |
| 2253 | ffa_id_t receiver_id = receiver->receiver_permissions.receiver; |
| 2254 | |
| 2255 | if (!vm_id_is_current_world(receiver_id)) { |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2256 | return true; |
| 2257 | } |
| 2258 | } |
| 2259 | return false; |
| 2260 | } |
| 2261 | |
| 2262 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 2263 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 2264 | * designated allocator of the memory handle. In practice, this also means |
| 2265 | * Hafnium is responsible for managing the state structures for the transaction. |
| 2266 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 2267 | * sender is an SP or there is at least one borrower that is an SP. |
| 2268 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 2269 | * operation involves only NWd VMs. |
| 2270 | * |
| 2271 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 2272 | * sender. Validation consists of checking if the message length and number of |
| 2273 | * memory region constituents match, and if the transition is valid for the |
| 2274 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 2275 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2276 | * Assumes that the caller has already found and locked the sender VM and copied |
| 2277 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 2278 | * allocated page from Hafnium's internal pool. The caller must have also |
| 2279 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2280 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2281 | * This function takes ownership of the `memory_region` passed in and will free |
| 2282 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2283 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2284 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2285 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2286 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2287 | uint32_t fragment_length, uint32_t share_func, |
| 2288 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2289 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2290 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2291 | struct share_states_locked share_states; |
| 2292 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2293 | |
| 2294 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2295 | * If there is an error validating the `memory_region` then we need to |
| 2296 | * free it because we own it but we won't be storing it in a share state |
| 2297 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2298 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2299 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 2300 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 2301 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2302 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2303 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2304 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2305 | } |
| 2306 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2307 | /* Set flag for share function, ready to be retrieved later. */ |
| 2308 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2309 | case FFA_MEM_SHARE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2310 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2311 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2312 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2313 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2314 | case FFA_MEM_LEND_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2315 | case FFA_MEM_LEND_32: |
| 2316 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2317 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2318 | case FFA_MEM_DONATE_64: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2319 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2320 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2321 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2322 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2323 | } |
| 2324 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2325 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2326 | /* |
| 2327 | * Allocate a share state before updating the page table. Otherwise if |
| 2328 | * updating the page table succeeded but allocating the share state |
| 2329 | * failed then it would leave the memory in a state where nobody could |
| 2330 | * get it back. |
| 2331 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 2332 | share_state = allocate_share_state(share_states, share_func, |
| 2333 | memory_region, fragment_length, |
| 2334 | FFA_MEMORY_HANDLE_INVALID); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 2335 | if (share_state == NULL) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2336 | dlog_verbose("Failed to allocate share state.\n"); |
| 2337 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2338 | ret = ffa_error(FFA_NO_MEMORY); |
| 2339 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2340 | } |
| 2341 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2342 | if (fragment_length == memory_share_length) { |
| 2343 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2344 | ret = ffa_memory_send_complete( |
| 2345 | from_locked, share_states, share_state, page_pool, |
| 2346 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2347 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2348 | /* |
| 2349 | * Use sender ID from 'memory_region' assuming |
| 2350 | * that at this point it has been validated: |
| 2351 | * - MBZ at virtual FF-A instance. |
| 2352 | */ |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2353 | ffa_id_t sender_to_ret = |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2354 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 2355 | ? memory_region->sender |
| 2356 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2357 | ret = (struct ffa_value){ |
| 2358 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 2359 | .arg1 = (uint32_t)memory_region->handle, |
| 2360 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2361 | .arg3 = fragment_length, |
| 2362 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2363 | } |
| 2364 | |
| 2365 | out: |
| 2366 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2367 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2368 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2369 | } |
| 2370 | |
| 2371 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2372 | * Continues an operation to donate, lend or share memory to a VM from current |
| 2373 | * world. If this is the last fragment then checks that the transition is valid |
| 2374 | * for the type of memory sending operation and updates the stage-2 page tables |
| 2375 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2376 | * |
| 2377 | * Assumes that the caller has already found and locked the sender VM and copied |
| 2378 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 2379 | * allocated page from Hafnium's internal pool. |
| 2380 | * |
| 2381 | * This function takes ownership of the `fragment` passed in; it must not be |
| 2382 | * freed by the caller. |
| 2383 | */ |
| 2384 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 2385 | void *fragment, |
| 2386 | uint32_t fragment_length, |
| 2387 | ffa_memory_handle_t handle, |
| 2388 | struct mpool *page_pool) |
| 2389 | { |
| 2390 | struct share_states_locked share_states = share_states_lock(); |
| 2391 | struct ffa_memory_share_state *share_state; |
| 2392 | struct ffa_value ret; |
| 2393 | struct ffa_memory_region *memory_region; |
| 2394 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 2395 | CHECK(is_aligned(fragment, |
| 2396 | alignof(struct ffa_memory_region_constituent))); |
| 2397 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 2398 | 0) { |
| 2399 | dlog_verbose("Fragment length %u misaligned.\n", |
| 2400 | fragment_length); |
| 2401 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2402 | goto out_free_fragment; |
| 2403 | } |
| 2404 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2405 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 2406 | &share_state, |
| 2407 | from_locked.vm->id, page_pool); |
| 2408 | if (ret.func != FFA_SUCCESS_32) { |
| 2409 | goto out_free_fragment; |
| 2410 | } |
| 2411 | memory_region = share_state->memory_region; |
| 2412 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2413 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2414 | dlog_error( |
| 2415 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2416 | "other world. This should never happen, and indicates " |
| 2417 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2418 | "EL3 code.\n"); |
| 2419 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2420 | goto out_free_fragment; |
| 2421 | } |
| 2422 | |
| 2423 | /* Add this fragment. */ |
| 2424 | share_state->fragments[share_state->fragment_count] = fragment; |
| 2425 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 2426 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 2427 | share_state->fragment_count++; |
| 2428 | |
| 2429 | /* Check whether the memory send operation is now ready to complete. */ |
| 2430 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2431 | ret = ffa_memory_send_complete( |
| 2432 | from_locked, share_states, share_state, page_pool, |
| 2433 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2434 | } else { |
| 2435 | ret = (struct ffa_value){ |
| 2436 | .func = FFA_MEM_FRAG_RX_32, |
| 2437 | .arg1 = (uint32_t)handle, |
| 2438 | .arg2 = (uint32_t)(handle >> 32), |
| 2439 | .arg3 = share_state_next_fragment_offset(share_states, |
| 2440 | share_state)}; |
| 2441 | } |
| 2442 | goto out; |
| 2443 | |
| 2444 | out_free_fragment: |
| 2445 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2446 | |
| 2447 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2448 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2449 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2450 | } |
| 2451 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2452 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 2453 | static void ffa_memory_retrieve_complete( |
| 2454 | struct share_states_locked share_states, |
| 2455 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 2456 | { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2457 | if (share_state->share_func == FFA_MEM_DONATE_32 || |
| 2458 | share_state->share_func == FFA_MEM_DONATE_64) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2459 | /* |
| 2460 | * Memory that has been donated can't be relinquished, |
| 2461 | * so no need to keep the share state around. |
| 2462 | */ |
| 2463 | share_state_free(share_states, share_state, page_pool); |
| 2464 | dlog_verbose("Freed share state for donate.\n"); |
| 2465 | } |
| 2466 | } |
| 2467 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2468 | /** |
| 2469 | * Initialises the given memory region descriptor to be used for an |
| 2470 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 2471 | * fragment. |
| 2472 | * The memory region descriptor is initialized according to retriever's |
| 2473 | * FF-A version. |
| 2474 | * |
| 2475 | * Returns true on success, or false if the given constituents won't all fit in |
| 2476 | * the first fragment. |
| 2477 | */ |
| 2478 | static bool ffa_retrieved_memory_region_init( |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2479 | void *response, enum ffa_version ffa_version, size_t response_max_size, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2480 | ffa_id_t sender, ffa_memory_attributes_t attributes, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2481 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2482 | ffa_memory_access_permissions_t permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2483 | struct ffa_memory_access *receivers, size_t receiver_count, |
| 2484 | uint32_t memory_access_desc_size, uint32_t page_count, |
| 2485 | uint32_t total_constituent_count, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2486 | const struct ffa_memory_region_constituent constituents[], |
| 2487 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 2488 | uint32_t *fragment_length) |
| 2489 | { |
| 2490 | struct ffa_composite_memory_region *composite_memory_region; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2491 | uint32_t i; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2492 | uint32_t composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2493 | uint32_t constituents_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2494 | |
| 2495 | assert(response != NULL); |
| 2496 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2497 | if (ffa_version == FFA_VERSION_1_0) { |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2498 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 2499 | (struct ffa_memory_region_v1_0 *)response; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2500 | struct ffa_memory_access_v1_0 *receiver; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2501 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2502 | ffa_memory_region_init_header_v1_0(retrieve_response, sender, |
| 2503 | attributes, flags, handle, 0, |
| 2504 | receiver_count); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2505 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2506 | receiver = (struct ffa_memory_access_v1_0 *) |
| 2507 | retrieve_response->receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2508 | receiver_count = retrieve_response->receiver_count; |
| 2509 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2510 | for (uint32_t i = 0; i < receiver_count; i++) { |
| 2511 | ffa_id_t receiver_id = |
| 2512 | receivers[i].receiver_permissions.receiver; |
| 2513 | ffa_memory_receiver_flags_t recv_flags = |
| 2514 | receivers[i].receiver_permissions.flags; |
| 2515 | |
| 2516 | /* |
| 2517 | * Initialized here as in memory retrieve responses we |
| 2518 | * currently expect one borrower to be specified. |
| 2519 | */ |
| 2520 | ffa_memory_access_init_v1_0( |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2521 | receiver, receiver_id, permissions.data_access, |
| 2522 | permissions.instruction_access, recv_flags); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2523 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2524 | |
| 2525 | composite_offset = |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2526 | sizeof(struct ffa_memory_region_v1_0) + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2527 | receiver_count * sizeof(struct ffa_memory_access_v1_0); |
| 2528 | receiver->composite_memory_region_offset = composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2529 | |
| 2530 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 2531 | retrieve_response, 0); |
| 2532 | } else { |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2533 | struct ffa_memory_region *retrieve_response = |
| 2534 | (struct ffa_memory_region *)response; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2535 | struct ffa_memory_access *retrieve_response_receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2536 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2537 | ffa_memory_region_init_header( |
| 2538 | retrieve_response, sender, attributes, flags, handle, 0, |
| 2539 | receiver_count, memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2540 | |
| 2541 | /* |
| 2542 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 2543 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 2544 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 2545 | * guaranteed that the offset we calculate here is aligned to a |
| 2546 | * 64-bit boundary and so 64-bit values can be copied without |
| 2547 | * alignment faults. |
| 2548 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2549 | composite_offset = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 2550 | retrieve_response->receivers_offset + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2551 | (uint32_t)(receiver_count * |
| 2552 | retrieve_response->memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2553 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2554 | retrieve_response_receivers = |
| 2555 | ffa_memory_region_get_receiver(retrieve_response, 0); |
| 2556 | assert(retrieve_response_receivers != NULL); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2557 | |
| 2558 | /* |
| 2559 | * Initialized here as in memory retrieve responses we currently |
| 2560 | * expect one borrower to be specified. |
| 2561 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2562 | memcpy_s(retrieve_response_receivers, |
| 2563 | sizeof(struct ffa_memory_access) * receiver_count, |
| 2564 | receivers, |
| 2565 | sizeof(struct ffa_memory_access) * receiver_count); |
| 2566 | |
| 2567 | retrieve_response_receivers->composite_memory_region_offset = |
| 2568 | composite_offset; |
| 2569 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2570 | composite_memory_region = |
| 2571 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 2572 | } |
| 2573 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2574 | assert(composite_memory_region != NULL); |
| 2575 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2576 | composite_memory_region->page_count = page_count; |
| 2577 | composite_memory_region->constituent_count = total_constituent_count; |
| 2578 | composite_memory_region->reserved_0 = 0; |
| 2579 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2580 | constituents_offset = |
| 2581 | composite_offset + sizeof(struct ffa_composite_memory_region); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2582 | if (constituents_offset + |
| 2583 | fragment_constituent_count * |
| 2584 | sizeof(struct ffa_memory_region_constituent) > |
| 2585 | response_max_size) { |
| 2586 | return false; |
| 2587 | } |
| 2588 | |
| 2589 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 2590 | composite_memory_region->constituents[i] = constituents[i]; |
| 2591 | } |
| 2592 | |
| 2593 | if (total_length != NULL) { |
| 2594 | *total_length = |
| 2595 | constituents_offset + |
| 2596 | composite_memory_region->constituent_count * |
| 2597 | sizeof(struct ffa_memory_region_constituent); |
| 2598 | } |
| 2599 | if (fragment_length != NULL) { |
| 2600 | *fragment_length = |
| 2601 | constituents_offset + |
| 2602 | fragment_constituent_count * |
| 2603 | sizeof(struct ffa_memory_region_constituent); |
| 2604 | } |
| 2605 | |
| 2606 | return true; |
| 2607 | } |
| 2608 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2609 | /** |
| 2610 | * Validates the retrieved permissions against those specified by the lender |
| 2611 | * of memory share operation. Optionally can help set the permissions to be used |
| 2612 | * for the S2 mapping, through the `permissions` argument. |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2613 | * Returns FFA_SUCCESS if all the fields are valid. FFA_ERROR, with error code: |
| 2614 | * - FFA_INVALID_PARAMETERS -> if the fields have invalid values as per the |
| 2615 | * specification for each ABI. |
| 2616 | * - FFA_DENIED -> if the permissions specified by the retriever are not |
| 2617 | * less permissive than those provided by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2618 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2619 | static struct ffa_value ffa_memory_retrieve_is_memory_access_valid( |
| 2620 | uint32_t share_func, enum ffa_data_access sent_data_access, |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2621 | enum ffa_data_access requested_data_access, |
| 2622 | enum ffa_instruction_access sent_instruction_access, |
| 2623 | enum ffa_instruction_access requested_instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2624 | ffa_memory_access_permissions_t *permissions, bool multiple_borrowers) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2625 | { |
| 2626 | switch (sent_data_access) { |
| 2627 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2628 | case FFA_DATA_ACCESS_RW: |
| 2629 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2630 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2631 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2632 | permissions->data_access = FFA_DATA_ACCESS_RW; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2633 | } |
| 2634 | break; |
| 2635 | } |
| 2636 | /* Intentional fall-through. */ |
| 2637 | case FFA_DATA_ACCESS_RO: |
| 2638 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2639 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2640 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2641 | permissions->data_access = FFA_DATA_ACCESS_RO; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2642 | } |
| 2643 | break; |
| 2644 | } |
| 2645 | dlog_verbose( |
| 2646 | "Invalid data access requested; sender specified " |
| 2647 | "permissions %#x but receiver requested %#x.\n", |
| 2648 | sent_data_access, requested_data_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2649 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2650 | case FFA_DATA_ACCESS_RESERVED: |
| 2651 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 2652 | "checked before this point."); |
| 2653 | } |
| 2654 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2655 | /* |
| 2656 | * For operations with a single borrower, If it is an FFA_MEMORY_LEND |
| 2657 | * or FFA_MEMORY_DONATE the retriever should have specifed the |
| 2658 | * instruction permissions it wishes to receive. |
| 2659 | */ |
| 2660 | switch (share_func) { |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2661 | case FFA_MEM_SHARE_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2662 | case FFA_MEM_SHARE_32: |
| 2663 | if (requested_instruction_access != |
| 2664 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2665 | dlog_verbose( |
| 2666 | "%s: for share instruction permissions must " |
| 2667 | "NOT be specified.\n", |
| 2668 | __func__); |
| 2669 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2670 | } |
| 2671 | break; |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2672 | case FFA_MEM_LEND_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2673 | case FFA_MEM_LEND_32: |
| 2674 | /* |
| 2675 | * For operations with multiple borrowers only permit XN |
| 2676 | * permissions, and both Sender and borrower should have used |
| 2677 | * FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED. |
| 2678 | */ |
| 2679 | if (multiple_borrowers) { |
| 2680 | if (requested_instruction_access != |
| 2681 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2682 | dlog_verbose( |
| 2683 | "%s: lend/share/donate with multiple " |
| 2684 | "borrowers " |
| 2685 | "instruction permissions must NOT be " |
| 2686 | "specified.\n", |
| 2687 | __func__); |
| 2688 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2689 | } |
| 2690 | break; |
| 2691 | } |
| 2692 | /* Fall through if the operation targets a single borrower. */ |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 2693 | case FFA_MEM_DONATE_64: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2694 | case FFA_MEM_DONATE_32: |
| 2695 | if (!multiple_borrowers && |
| 2696 | requested_instruction_access == |
| 2697 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2698 | dlog_verbose( |
| 2699 | "%s: for lend/donate with single borrower " |
| 2700 | "instruction permissions must be speficified " |
| 2701 | "by borrower\n", |
| 2702 | __func__); |
| 2703 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2704 | } |
| 2705 | break; |
| 2706 | default: |
| 2707 | panic("%s: Wrong func id provided.\n", __func__); |
| 2708 | } |
| 2709 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2710 | switch (sent_instruction_access) { |
| 2711 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2712 | case FFA_INSTRUCTION_ACCESS_X: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2713 | if (requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2714 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2715 | permissions->instruction_access = |
| 2716 | FFA_INSTRUCTION_ACCESS_X; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2717 | } |
| 2718 | break; |
| 2719 | } |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2720 | /* |
| 2721 | * Fall through if requested permissions are less |
| 2722 | * permissive than those provided by the sender. |
| 2723 | */ |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2724 | case FFA_INSTRUCTION_ACCESS_NX: |
| 2725 | if (requested_instruction_access == |
| 2726 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2727 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2728 | if (permissions != NULL) { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2729 | permissions->instruction_access = |
| 2730 | FFA_INSTRUCTION_ACCESS_NX; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2731 | } |
| 2732 | break; |
| 2733 | } |
| 2734 | dlog_verbose( |
| 2735 | "Invalid instruction access requested; sender " |
| 2736 | "specified permissions %#x but receiver requested " |
| 2737 | "%#x.\n", |
| 2738 | sent_instruction_access, requested_instruction_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2739 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2740 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2741 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 2742 | "be checked before this point."); |
| 2743 | } |
| 2744 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2745 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2746 | } |
| 2747 | |
| 2748 | /** |
| 2749 | * Validate the receivers' permissions in the retrieve request against those |
| 2750 | * specified by the lender. |
| 2751 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 2752 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2753 | * The function looks into the flag to bypass multiple borrower checks: |
| 2754 | * - If not set returns FFA_SUCCESS if all specified permissions are valid. |
| 2755 | * - If set returns FFA_SUCCESS if the descriptor contains the permissions |
| 2756 | * to the caller of FFA_MEM_RETRIEVE_REQ and they are valid. Other permissions |
| 2757 | * are ignored, if provided. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2758 | */ |
| 2759 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 2760 | struct ffa_memory_region *memory_region, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2761 | struct ffa_memory_region *retrieve_request, ffa_id_t to_vm_id, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2762 | ffa_memory_access_permissions_t *permissions, |
| 2763 | struct ffa_memory_access **receiver_ret, uint32_t func_id) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2764 | { |
| 2765 | uint32_t retrieve_receiver_index; |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2766 | bool bypass_multi_receiver_check = |
| 2767 | (retrieve_request->flags & |
| 2768 | FFA_MEMORY_REGION_FLAG_BYPASS_BORROWERS_CHECK) != 0U; |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2769 | const uint32_t region_receiver_count = memory_region->receiver_count; |
| 2770 | struct ffa_value ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2771 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2772 | assert(receiver_ret != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2773 | assert(permissions != NULL); |
| 2774 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2775 | *permissions = (ffa_memory_access_permissions_t){0}; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2776 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2777 | if (!bypass_multi_receiver_check) { |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2778 | if (retrieve_request->receiver_count != region_receiver_count) { |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2779 | dlog_verbose( |
| 2780 | "Retrieve request should contain same list of " |
| 2781 | "borrowers, as specified by the lender.\n"); |
| 2782 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2783 | } |
| 2784 | } else { |
| 2785 | if (retrieve_request->receiver_count != 1) { |
| 2786 | dlog_verbose( |
| 2787 | "Set bypass multiple borrower check, receiver " |
| 2788 | "list must be sized 1 (%x)\n", |
| 2789 | memory_region->receiver_count); |
| 2790 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2791 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2792 | } |
| 2793 | |
| 2794 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2795 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2796 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2797 | ffa_memory_access_permissions_t sent_permissions; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2798 | struct ffa_memory_access *retrieve_request_receiver = |
| 2799 | ffa_memory_region_get_receiver(retrieve_request, i); |
| 2800 | assert(retrieve_request_receiver != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2801 | ffa_memory_access_permissions_t requested_permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2802 | retrieve_request_receiver->receiver_permissions |
| 2803 | .permissions; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2804 | ffa_id_t current_receiver_id = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2805 | retrieve_request_receiver->receiver_permissions |
| 2806 | .receiver; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2807 | struct ffa_memory_access *receiver; |
| 2808 | uint32_t mem_region_receiver_index; |
| 2809 | bool permissions_RO; |
| 2810 | bool clear_memory_flags; |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 2811 | /* |
| 2812 | * If the call is at the virtual FF-A instance the caller's |
| 2813 | * ID must match an entry in the memory access list. |
| 2814 | * In the SPMC, one of the specified receivers could be from |
| 2815 | * the NWd. |
| 2816 | */ |
| 2817 | bool found_to_id = vm_id_is_current_world(to_vm_id) |
| 2818 | ? (current_receiver_id == to_vm_id) |
| 2819 | : (!vm_id_is_current_world( |
| 2820 | current_receiver_id)); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2821 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2822 | if (bypass_multi_receiver_check && !found_to_id) { |
| 2823 | dlog_verbose( |
| 2824 | "Bypass multiple borrower check for id %x.\n", |
| 2825 | current_receiver_id); |
| 2826 | continue; |
| 2827 | } |
| 2828 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2829 | if (retrieve_request_receiver->composite_memory_region_offset != |
| 2830 | 0U) { |
| 2831 | dlog_verbose( |
| 2832 | "Retriever specified address ranges not " |
| 2833 | "supported (got offset %d).\n", |
| 2834 | retrieve_request_receiver |
| 2835 | ->composite_memory_region_offset); |
| 2836 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2837 | } |
| 2838 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2839 | /* |
| 2840 | * Find the current receiver in the transaction descriptor from |
| 2841 | * sender. |
| 2842 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2843 | mem_region_receiver_index = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2844 | ffa_memory_region_get_receiver_index( |
| 2845 | memory_region, current_receiver_id); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2846 | |
| 2847 | if (mem_region_receiver_index == |
| 2848 | memory_region->receiver_count) { |
| 2849 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2850 | current_receiver_id); |
| 2851 | return ffa_error(FFA_DENIED); |
| 2852 | } |
| 2853 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2854 | receiver = ffa_memory_region_get_receiver( |
| 2855 | memory_region, mem_region_receiver_index); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2856 | assert(receiver != NULL); |
| 2857 | |
| 2858 | sent_permissions = receiver->receiver_permissions.permissions; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2859 | |
| 2860 | if (found_to_id) { |
| 2861 | retrieve_receiver_index = i; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2862 | |
| 2863 | *receiver_ret = receiver; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2864 | } |
| 2865 | |
| 2866 | /* |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2867 | * Check if retrieve request memory access list is valid: |
| 2868 | * - The retrieve request complies with the specification. |
| 2869 | * - Permissions are within those specified by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2870 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2871 | ret = ffa_memory_retrieve_is_memory_access_valid( |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2872 | func_id, sent_permissions.data_access, |
| 2873 | requested_permissions.data_access, |
| 2874 | sent_permissions.instruction_access, |
| 2875 | requested_permissions.instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2876 | found_to_id ? permissions : NULL, |
| 2877 | region_receiver_count > 1); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2878 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2879 | if (ret.func != FFA_SUCCESS_32) { |
| 2880 | return ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2881 | } |
| 2882 | |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2883 | permissions_RO = |
| 2884 | (permissions->data_access == FFA_DATA_ACCESS_RO); |
J-Alves | e526237 | 2024-03-27 11:02:03 +0000 | [diff] [blame] | 2885 | clear_memory_flags = |
| 2886 | (retrieve_request->flags & |
| 2887 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2888 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2889 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2890 | /* |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2891 | * Can't request PM to clear memory if only provided |
| 2892 | * with RO permissions. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2893 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 2894 | if (found_to_id && permissions_RO && clear_memory_flags) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2895 | dlog_verbose( |
| 2896 | "Receiver has RO permissions can not request " |
| 2897 | "clear.\n"); |
| 2898 | return ffa_error(FFA_DENIED); |
| 2899 | } |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2900 | |
| 2901 | /* |
| 2902 | * Check the impdef in the retrieve_request matches the value in |
| 2903 | * the original memory send. |
| 2904 | */ |
| 2905 | if (ffa_version_from_memory_access_desc_size( |
| 2906 | memory_region->memory_access_desc_size) >= |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2907 | FFA_VERSION_1_2 && |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2908 | ffa_version_from_memory_access_desc_size( |
| 2909 | retrieve_request->memory_access_desc_size) >= |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 2910 | FFA_VERSION_1_2) { |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2911 | if (receiver->impdef.val[0] != |
| 2912 | retrieve_request_receiver->impdef.val[0] || |
| 2913 | receiver->impdef.val[1] != |
| 2914 | retrieve_request_receiver->impdef.val[1]) { |
| 2915 | dlog_verbose( |
| 2916 | "Impdef value in memory send does not " |
| 2917 | "match retrieve request value " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 2918 | "send value %#lx %#lx retrieve request " |
| 2919 | "value %#lx %#lx\n", |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2920 | receiver->impdef.val[0], |
| 2921 | receiver->impdef.val[1], |
| 2922 | retrieve_request_receiver->impdef |
| 2923 | .val[0], |
| 2924 | retrieve_request_receiver->impdef |
| 2925 | .val[1]); |
| 2926 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2927 | } |
| 2928 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2929 | } |
| 2930 | |
| 2931 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2932 | dlog_verbose( |
| 2933 | "Retrieve request does not contain caller's (%x) " |
| 2934 | "permissions\n", |
| 2935 | to_vm_id); |
| 2936 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2937 | } |
| 2938 | |
| 2939 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2940 | } |
| 2941 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2942 | /* |
| 2943 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 2944 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 2945 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 2946 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 2947 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 2948 | * exception of the sender ID and handle. |
| 2949 | */ |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2950 | bool is_ffa_hypervisor_retrieve_request(struct ffa_memory_region *request, |
| 2951 | struct vm_locked to_locked) |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2952 | { |
| 2953 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 2954 | request->attributes.shareability == 0U && |
| 2955 | request->attributes.cacheability == 0U && |
| 2956 | request->attributes.type == 0U && |
| 2957 | request->attributes.security == 0U && request->flags == 0U && |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2958 | request->tag == 0U && request->receiver_count == 0U && |
| 2959 | plat_ffa_memory_handle_allocated_by_current_world( |
| 2960 | request->handle); |
| 2961 | } |
| 2962 | |
| 2963 | /* |
| 2964 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 2965 | */ |
| 2966 | static void ffa_memory_retrieve_complete_from_hyp( |
| 2967 | struct ffa_memory_share_state *share_state) |
| 2968 | { |
| 2969 | if (share_state->hypervisor_fragment_count == |
| 2970 | share_state->fragment_count) { |
| 2971 | share_state->hypervisor_fragment_count = 0; |
| 2972 | } |
| 2973 | } |
| 2974 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2975 | /** |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2976 | * Prepares the return of the ffa_value for the memory retrieve response. |
| 2977 | */ |
| 2978 | static struct ffa_value ffa_memory_retrieve_resp(uint32_t total_length, |
| 2979 | uint32_t fragment_length) |
| 2980 | { |
| 2981 | return (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
| 2982 | .arg1 = total_length, |
| 2983 | .arg2 = fragment_length}; |
| 2984 | } |
| 2985 | |
| 2986 | /** |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2987 | * Validate that the memory region descriptor provided by the borrower on |
| 2988 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 2989 | * memory sharing call. |
| 2990 | */ |
| 2991 | static struct ffa_value ffa_memory_retrieve_validate( |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2992 | ffa_id_t to_id, struct ffa_memory_region *retrieve_request, |
| 2993 | uint32_t retrieve_request_length, |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2994 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 2995 | uint32_t share_func) |
| 2996 | { |
| 2997 | ffa_memory_region_flags_t transaction_type = |
| 2998 | retrieve_request->flags & |
| 2999 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3000 | enum ffa_memory_security security_state; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3001 | const uint64_t memory_access_desc_size = |
| 3002 | retrieve_request->memory_access_desc_size; |
| 3003 | const uint32_t expected_retrieve_request_length = |
| 3004 | retrieve_request->receivers_offset + |
| 3005 | (uint32_t)(retrieve_request->receiver_count * |
| 3006 | memory_access_desc_size); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3007 | |
| 3008 | assert(retrieve_request != NULL); |
| 3009 | assert(memory_region != NULL); |
| 3010 | assert(receiver_index != NULL); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3011 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3012 | if (retrieve_request_length != expected_retrieve_request_length) { |
| 3013 | dlog_verbose( |
| 3014 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
| 3015 | "but was %d.\n", |
| 3016 | expected_retrieve_request_length, |
| 3017 | retrieve_request_length); |
| 3018 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3019 | } |
| 3020 | |
| 3021 | if (retrieve_request->sender != memory_region->sender) { |
| 3022 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3023 | "Memory with handle %#lx not fully sent, can't " |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3024 | "retrieve.\n", |
| 3025 | memory_region->handle); |
| 3026 | return ffa_error(FFA_DENIED); |
| 3027 | } |
| 3028 | |
| 3029 | /* |
| 3030 | * The SPMC can only process retrieve requests to memory share |
| 3031 | * operations with one borrower from the other world. It can't |
| 3032 | * determine the ID of the NWd VM that invoked the retrieve |
| 3033 | * request interface call. It relies on the hypervisor to |
| 3034 | * validate the caller's ID against that provided in the |
| 3035 | * `receivers` list of the retrieve response. |
| 3036 | * In case there is only one borrower from the NWd in the |
| 3037 | * transaction descriptor, record that in the `receiver_id` for |
| 3038 | * later use, and validate in the retrieve request message. |
| 3039 | * This limitation is due to the fact SPMC can't determine the |
| 3040 | * index in the memory share structures state to update. |
| 3041 | */ |
| 3042 | if (to_id == HF_HYPERVISOR_VM_ID) { |
| 3043 | uint32_t other_world_count = 0; |
| 3044 | |
| 3045 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3046 | struct ffa_memory_access *receiver = |
| 3047 | ffa_memory_region_get_receiver(retrieve_request, |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3048 | i); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3049 | assert(receiver != NULL); |
| 3050 | |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3051 | if (!vm_id_is_current_world( |
| 3052 | receiver->receiver_permissions.receiver)) { |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3053 | other_world_count++; |
J-Alves | f220d57 | 2024-04-24 22:15:14 +0100 | [diff] [blame] | 3054 | /* Set it to be used later. */ |
| 3055 | to_id = receiver->receiver_permissions.receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3056 | } |
| 3057 | } |
| 3058 | |
| 3059 | if (other_world_count > 1) { |
| 3060 | dlog_verbose( |
| 3061 | "Support one receiver from the other " |
| 3062 | "world.\n"); |
| 3063 | return ffa_error(FFA_NOT_SUPPORTED); |
| 3064 | } |
| 3065 | } |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3066 | /* |
| 3067 | * Check that the transaction type expected by the receiver is |
| 3068 | * correct, if it has been specified. |
| 3069 | */ |
| 3070 | if (transaction_type != |
| 3071 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 3072 | transaction_type != (memory_region->flags & |
| 3073 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 3074 | dlog_verbose( |
| 3075 | "Incorrect transaction type %#x for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3076 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#lx.\n", |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3077 | transaction_type, |
| 3078 | memory_region->flags & |
| 3079 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 3080 | retrieve_request->handle); |
| 3081 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3082 | } |
| 3083 | |
| 3084 | if (retrieve_request->tag != memory_region->tag) { |
| 3085 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3086 | "Incorrect tag %lu for FFA_MEM_RETRIEVE_REQ, expected " |
| 3087 | "%lu for handle %#lx.\n", |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3088 | retrieve_request->tag, memory_region->tag, |
| 3089 | retrieve_request->handle); |
| 3090 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3091 | } |
| 3092 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3093 | *receiver_index = |
| 3094 | ffa_memory_region_get_receiver_index(memory_region, to_id); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3095 | |
| 3096 | if (*receiver_index == memory_region->receiver_count) { |
| 3097 | dlog_verbose( |
| 3098 | "Incorrect receiver VM ID %d for " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3099 | "FFA_MEM_RETRIEVE_REQ, for handle %#lx.\n", |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3100 | to_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3101 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3102 | } |
| 3103 | |
| 3104 | if ((retrieve_request->flags & |
| 3105 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 3106 | dlog_verbose( |
| 3107 | "Retriever specified 'address range alignment 'hint' " |
| 3108 | "not supported.\n"); |
| 3109 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3110 | } |
| 3111 | if ((retrieve_request->flags & |
| 3112 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 3113 | dlog_verbose( |
| 3114 | "Bits 8-5 must be zero in memory region's flags " |
| 3115 | "(address range alignment hint not supported).\n"); |
| 3116 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3117 | } |
| 3118 | |
| 3119 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 3120 | dlog_verbose( |
| 3121 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 3122 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3123 | } |
| 3124 | |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 3125 | if ((share_func == FFA_MEM_SHARE_32 || |
| 3126 | share_func == FFA_MEM_SHARE_64) && |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3127 | (retrieve_request->flags & |
| 3128 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 3129 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 3130 | dlog_verbose( |
| 3131 | "Memory Share operation can't clean after relinquish " |
| 3132 | "memory region.\n"); |
| 3133 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3134 | } |
| 3135 | |
| 3136 | /* |
| 3137 | * If the borrower needs the memory to be cleared before mapping |
| 3138 | * to its address space, the sender should have set the flag |
| 3139 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 3140 | * FFA_DENIED. |
| 3141 | */ |
| 3142 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 3143 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 3144 | dlog_verbose( |
| 3145 | "Borrower needs memory cleared. Sender needs to set " |
| 3146 | "flag for clearing memory.\n"); |
| 3147 | return ffa_error(FFA_DENIED); |
| 3148 | } |
| 3149 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3150 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3151 | security_state = retrieve_request->attributes.security; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 3152 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 3153 | dlog_verbose( |
| 3154 | "Invalid security state for memory retrieve request " |
| 3155 | "operation.\n"); |
| 3156 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 3157 | } |
| 3158 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3159 | /* |
| 3160 | * If memory type is not specified, bypass validation of memory |
| 3161 | * attributes in the retrieve request. The retriever is expecting to |
| 3162 | * obtain this information from the SPMC. |
| 3163 | */ |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3164 | if (retrieve_request->attributes.type == FFA_MEMORY_NOT_SPECIFIED_MEM) { |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3165 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 3166 | } |
| 3167 | |
| 3168 | /* |
| 3169 | * Ensure receiver's attributes are compatible with how |
| 3170 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 3171 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 3172 | */ |
| 3173 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 3174 | } |
| 3175 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3176 | static struct ffa_value ffa_partition_retrieve_request( |
| 3177 | struct share_states_locked share_states, |
| 3178 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 3179 | struct ffa_memory_region *retrieve_request, |
| 3180 | uint32_t retrieve_request_length, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3181 | { |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3182 | ffa_memory_access_permissions_t permissions = {0}; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 3183 | uint32_t memory_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3184 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3185 | struct ffa_composite_memory_region *composite; |
| 3186 | uint32_t total_length; |
| 3187 | uint32_t fragment_length; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 3188 | ffa_id_t receiver_id = to_locked.vm->id; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3189 | bool is_retrieve_complete = false; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3190 | const uint64_t memory_access_desc_size = |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 3191 | retrieve_request->memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3192 | uint32_t receiver_index; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3193 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3194 | ffa_memory_handle_t handle = retrieve_request->handle; |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3195 | ffa_memory_attributes_t attributes = {0}; |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3196 | uint32_t retrieve_mode = 0; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3197 | struct ffa_memory_region *memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3198 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3199 | if (!share_state->sending_complete) { |
| 3200 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3201 | "Memory with handle %#lx not fully sent, can't " |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3202 | "retrieve.\n", |
| 3203 | handle); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3204 | return ffa_error(FFA_INVALID_PARAMETERS); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3205 | } |
| 3206 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3207 | /* |
| 3208 | * Validate retrieve request, according to what was sent by the |
| 3209 | * sender. Function will output the `receiver_index` from the |
| 3210 | * provided memory region. |
| 3211 | */ |
| 3212 | ret = ffa_memory_retrieve_validate( |
| 3213 | receiver_id, retrieve_request, retrieve_request_length, |
| 3214 | memory_region, &receiver_index, share_state->share_func); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3215 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3216 | if (ret.func != FFA_SUCCESS_32) { |
| 3217 | return ret; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 3218 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 3219 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3220 | /* |
| 3221 | * Validate the requested permissions against the sent |
| 3222 | * permissions. |
| 3223 | * Outputs the permissions to give to retriever at S2 |
| 3224 | * PTs. |
| 3225 | */ |
| 3226 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 3227 | memory_region, retrieve_request, receiver_id, &permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3228 | &receiver, share_state->share_func); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3229 | if (ret.func != FFA_SUCCESS_32) { |
| 3230 | return ret; |
| 3231 | } |
| 3232 | |
| 3233 | memory_to_mode = ffa_memory_permissions_to_mode( |
| 3234 | permissions, share_state->sender_orig_mode); |
| 3235 | |
| 3236 | ret = ffa_retrieve_check_update( |
| 3237 | to_locked, share_state->fragments, |
| 3238 | share_state->fragment_constituent_counts, |
| 3239 | share_state->fragment_count, memory_to_mode, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3240 | share_state->share_func, false, page_pool, &retrieve_mode, |
| 3241 | share_state->memory_protected); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3242 | |
| 3243 | if (ret.func != FFA_SUCCESS_32) { |
| 3244 | return ret; |
| 3245 | } |
| 3246 | |
| 3247 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 3248 | |
| 3249 | is_retrieve_complete = |
| 3250 | share_state->retrieved_fragment_count[receiver_index] == |
| 3251 | share_state->fragment_count; |
| 3252 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 3253 | /* VMs acquire the RX buffer from SPMC. */ |
| 3254 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 3255 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3256 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3257 | * Copy response to RX buffer of caller and deliver the message. |
| 3258 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3259 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3260 | composite = ffa_memory_region_get_composite(memory_region, 0); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3261 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3262 | /* |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3263 | * Set the security state in the memory retrieve response attributes |
| 3264 | * if specified by the target mode. |
| 3265 | */ |
| 3266 | attributes = plat_ffa_memory_security_mode(memory_region->attributes, |
| 3267 | retrieve_mode); |
| 3268 | |
| 3269 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3270 | * Constituents which we received in the first fragment should |
| 3271 | * always fit in the first fragment we are sending, because the |
| 3272 | * header is the same size in both cases and we have a fixed |
| 3273 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 3274 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3275 | */ |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 3276 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3277 | /* Provide the permissions that had been provided. */ |
| 3278 | receiver->receiver_permissions.permissions = permissions; |
| 3279 | |
| 3280 | /* |
| 3281 | * Prepare the memory region descriptor for the retrieve response. |
| 3282 | * Provide the pointer to the receiver tracked in the share state |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3283 | * structures. |
| 3284 | * At this point the retrieve request descriptor from the partition |
| 3285 | * has been processed. The `retrieve_request` is expected to be in |
| 3286 | * a region that is handled by the SPMC/Hyp. Reuse the same buffer to |
| 3287 | * prepare the retrieve response before copying it to the RX buffer of |
| 3288 | * the caller. |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3289 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3290 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3291 | retrieve_request, to_locked.vm->ffa_version, HF_MAILBOX_SIZE, |
| 3292 | memory_region->sender, attributes, memory_region->flags, handle, |
| 3293 | permissions, receiver, 1, memory_access_desc_size, |
| 3294 | composite->page_count, composite->constituent_count, |
| 3295 | share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3296 | share_state->fragment_constituent_counts[0], &total_length, |
| 3297 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 3298 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3299 | /* |
| 3300 | * Copy the message from the buffer into the partition's mailbox. |
| 3301 | * The operation might fail unexpectedly due to change in PAS address |
| 3302 | * space, or improper values to the sizes of the structures. |
| 3303 | */ |
| 3304 | if (!memcpy_trapped(to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3305 | retrieve_request, fragment_length)) { |
| 3306 | dlog_error( |
| 3307 | "%s: aborted the copy of response to RX buffer of " |
| 3308 | "%x.\n", |
| 3309 | __func__, to_locked.vm->id); |
| 3310 | return ffa_error(FFA_ABORTED); |
| 3311 | } |
| 3312 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3313 | if (is_retrieve_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3314 | ffa_memory_retrieve_complete(share_states, share_state, |
| 3315 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3316 | } |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3317 | |
| 3318 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 3319 | } |
| 3320 | |
| 3321 | static struct ffa_value ffa_hypervisor_retrieve_request( |
| 3322 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 3323 | struct ffa_memory_region *retrieve_request) |
| 3324 | { |
| 3325 | struct ffa_value ret; |
| 3326 | struct ffa_composite_memory_region *composite; |
| 3327 | uint32_t total_length; |
| 3328 | uint32_t fragment_length; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3329 | ffa_memory_attributes_t attributes; |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3330 | uint64_t memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3331 | struct ffa_memory_region *memory_region; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3332 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3333 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 3334 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3335 | memory_region = share_state->memory_region; |
| 3336 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3337 | assert(to_locked.vm->id == HF_HYPERVISOR_VM_ID); |
| 3338 | |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3339 | switch (to_locked.vm->ffa_version) { |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3340 | case FFA_VERSION_1_2: |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3341 | memory_access_desc_size = sizeof(struct ffa_memory_access); |
| 3342 | break; |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3343 | case FFA_VERSION_1_0: |
| 3344 | case FFA_VERSION_1_1: |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 3345 | memory_access_desc_size = sizeof(struct ffa_memory_access_v1_0); |
| 3346 | break; |
| 3347 | default: |
| 3348 | panic("version not supported: %x\n", to_locked.vm->ffa_version); |
| 3349 | } |
| 3350 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3351 | if (share_state->hypervisor_fragment_count != 0U) { |
| 3352 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3353 | "Memory with handle %#lx already retrieved by " |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3354 | "the hypervisor.\n", |
| 3355 | handle); |
| 3356 | return ffa_error(FFA_DENIED); |
| 3357 | } |
| 3358 | |
| 3359 | share_state->hypervisor_fragment_count = 1; |
| 3360 | |
| 3361 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 3362 | |
| 3363 | /* VMs acquire the RX buffer from SPMC. */ |
| 3364 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 3365 | |
| 3366 | /* |
| 3367 | * Copy response to RX buffer of caller and deliver the message. |
| 3368 | * This must be done before the share_state is (possibly) freed. |
| 3369 | */ |
| 3370 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 3371 | |
| 3372 | /* |
| 3373 | * Constituents which we received in the first fragment should |
| 3374 | * always fit in the first fragment we are sending, because the |
| 3375 | * header is the same size in both cases and we have a fixed |
| 3376 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 3377 | * should never fail. |
| 3378 | */ |
| 3379 | |
| 3380 | /* |
| 3381 | * Set the security state in the memory retrieve response attributes |
| 3382 | * if specified by the target mode. |
| 3383 | */ |
| 3384 | attributes = plat_ffa_memory_security_mode( |
| 3385 | memory_region->attributes, share_state->sender_orig_mode); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3386 | |
| 3387 | receiver = ffa_memory_region_get_receiver(memory_region, 0); |
| 3388 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3389 | /* |
| 3390 | * At this point the `retrieve_request` is expected to be in a section |
| 3391 | * managed by the hypervisor. |
| 3392 | */ |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3393 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3394 | retrieve_request, to_locked.vm->ffa_version, HF_MAILBOX_SIZE, |
| 3395 | memory_region->sender, attributes, memory_region->flags, handle, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame] | 3396 | receiver->receiver_permissions.permissions, receiver, |
| 3397 | memory_region->receiver_count, memory_access_desc_size, |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3398 | composite->page_count, composite->constituent_count, |
| 3399 | share_state->fragments[0], |
| 3400 | share_state->fragment_constituent_counts[0], &total_length, |
| 3401 | &fragment_length)); |
| 3402 | |
J-Alves | 7b9cc43 | 2024-04-04 10:57:17 +0100 | [diff] [blame^] | 3403 | /* |
| 3404 | * Copy the message from the buffer into the hypervisor's mailbox. |
| 3405 | * The operation might fail unexpectedly due to change in PAS, or |
| 3406 | * improper values for the sizes of the structures. |
| 3407 | */ |
| 3408 | if (!memcpy_trapped(to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3409 | retrieve_request, fragment_length)) { |
| 3410 | dlog_error( |
| 3411 | "%s: aborted the copy of response to RX buffer of " |
| 3412 | "%x.\n", |
| 3413 | __func__, to_locked.vm->id); |
| 3414 | return ffa_error(FFA_ABORTED); |
| 3415 | } |
| 3416 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3417 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 3418 | } |
| 3419 | |
| 3420 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 3421 | struct ffa_memory_region *retrieve_request, |
| 3422 | uint32_t retrieve_request_length, |
| 3423 | struct mpool *page_pool) |
| 3424 | { |
| 3425 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 3426 | struct share_states_locked share_states; |
| 3427 | struct ffa_memory_share_state *share_state; |
| 3428 | struct ffa_value ret; |
| 3429 | |
| 3430 | dump_share_states(); |
| 3431 | |
| 3432 | share_states = share_states_lock(); |
| 3433 | share_state = get_share_state(share_states, handle); |
| 3434 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3435 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RETRIEVE_REQ.\n", |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3436 | handle); |
| 3437 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3438 | goto out; |
| 3439 | } |
| 3440 | |
| 3441 | if (is_ffa_hypervisor_retrieve_request(retrieve_request, to_locked)) { |
| 3442 | ret = ffa_hypervisor_retrieve_request(share_state, to_locked, |
| 3443 | retrieve_request); |
| 3444 | } else { |
| 3445 | ret = ffa_partition_retrieve_request( |
| 3446 | share_states, share_state, to_locked, retrieve_request, |
| 3447 | retrieve_request_length, page_pool); |
| 3448 | } |
| 3449 | |
| 3450 | /* Track use of the RX buffer if the handling has succeeded. */ |
| 3451 | if (ret.func == FFA_MEM_RETRIEVE_RESP_32) { |
| 3452 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
| 3453 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
| 3454 | } |
| 3455 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3456 | out: |
| 3457 | share_states_unlock(&share_states); |
| 3458 | dump_share_states(); |
| 3459 | return ret; |
| 3460 | } |
| 3461 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3462 | /** |
| 3463 | * Determine expected fragment offset according to the FF-A version of |
| 3464 | * the caller. |
| 3465 | */ |
| 3466 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3467 | struct ffa_memory_region *memory_region, |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3468 | uint32_t retrieved_constituents_count, enum ffa_version ffa_version) |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3469 | { |
| 3470 | uint32_t expected_fragment_offset; |
| 3471 | uint32_t composite_constituents_offset; |
| 3472 | |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3473 | if (ffa_version >= FFA_VERSION_1_1) { |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3474 | /* |
| 3475 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 3476 | * can retrieve the constituents offset from descriptor. |
| 3477 | */ |
| 3478 | composite_constituents_offset = |
| 3479 | ffa_composite_constituent_offset(memory_region, 0); |
Karl Meakin | 0e617d9 | 2024-04-05 12:55:22 +0100 | [diff] [blame] | 3480 | } else if (ffa_version == FFA_VERSION_1_0) { |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3481 | /* |
| 3482 | * If retriever is FF-A v1.0, determine the composite offset |
| 3483 | * as it is expected to have been configured in the |
| 3484 | * retrieve response. |
| 3485 | */ |
| 3486 | composite_constituents_offset = |
| 3487 | sizeof(struct ffa_memory_region_v1_0) + |
| 3488 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3489 | sizeof(struct ffa_memory_access_v1_0) + |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3490 | sizeof(struct ffa_composite_memory_region); |
| 3491 | } else { |
| 3492 | panic("%s received an invalid FF-A version.\n", __func__); |
| 3493 | } |
| 3494 | |
| 3495 | expected_fragment_offset = |
| 3496 | composite_constituents_offset + |
| 3497 | retrieved_constituents_count * |
| 3498 | sizeof(struct ffa_memory_region_constituent) - |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3499 | (uint32_t)(memory_region->memory_access_desc_size * |
| 3500 | (memory_region->receiver_count - 1)); |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3501 | |
| 3502 | return expected_fragment_offset; |
| 3503 | } |
| 3504 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3505 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 3506 | ffa_memory_handle_t handle, |
| 3507 | uint32_t fragment_offset, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 3508 | ffa_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3509 | struct mpool *page_pool) |
| 3510 | { |
| 3511 | struct ffa_memory_region *memory_region; |
| 3512 | struct share_states_locked share_states; |
| 3513 | struct ffa_memory_share_state *share_state; |
| 3514 | struct ffa_value ret; |
| 3515 | uint32_t fragment_index; |
| 3516 | uint32_t retrieved_constituents_count; |
| 3517 | uint32_t i; |
| 3518 | uint32_t expected_fragment_offset; |
| 3519 | uint32_t remaining_constituent_count; |
| 3520 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3521 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3522 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3523 | |
| 3524 | dump_share_states(); |
| 3525 | |
| 3526 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3527 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3528 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3529 | dlog_verbose("Invalid handle %#lx for FFA_MEM_FRAG_RX.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3530 | handle); |
| 3531 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3532 | goto out; |
| 3533 | } |
| 3534 | |
| 3535 | memory_region = share_state->memory_region; |
| 3536 | CHECK(memory_region != NULL); |
| 3537 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3538 | if (!share_state->sending_complete) { |
| 3539 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3540 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3541 | "retrieve.\n", |
| 3542 | handle); |
| 3543 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3544 | goto out; |
| 3545 | } |
| 3546 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3547 | /* |
| 3548 | * If retrieve request from the hypervisor has been initiated in the |
| 3549 | * given share_state, continue it, else assume it is a continuation of |
| 3550 | * retrieve request from a NWd VM. |
| 3551 | */ |
| 3552 | continue_ffa_hyp_mem_retrieve_req = |
| 3553 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 3554 | (share_state->hypervisor_fragment_count != 0U) && |
J-Alves | 661e1b7 | 2023-08-02 13:39:40 +0100 | [diff] [blame] | 3555 | ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3556 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3557 | if (!continue_ffa_hyp_mem_retrieve_req) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3558 | receiver_index = ffa_memory_region_get_receiver_index( |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3559 | memory_region, to_locked.vm->id); |
| 3560 | |
| 3561 | if (receiver_index == memory_region->receiver_count) { |
| 3562 | dlog_verbose( |
| 3563 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3564 | "borrower to memory sharing transaction " |
| 3565 | "(%lx)\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3566 | to_locked.vm->id, handle); |
| 3567 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3568 | goto out; |
| 3569 | } |
| 3570 | |
| 3571 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3572 | 0 || |
| 3573 | share_state->retrieved_fragment_count[receiver_index] >= |
| 3574 | share_state->fragment_count) { |
| 3575 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3576 | "Retrieval of memory with handle %#lx not yet " |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3577 | "started or already completed (%d/%d fragments " |
| 3578 | "retrieved).\n", |
| 3579 | handle, |
| 3580 | share_state->retrieved_fragment_count |
| 3581 | [receiver_index], |
| 3582 | share_state->fragment_count); |
| 3583 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3584 | goto out; |
| 3585 | } |
| 3586 | |
| 3587 | fragment_index = |
| 3588 | share_state->retrieved_fragment_count[receiver_index]; |
| 3589 | } else { |
| 3590 | if (share_state->hypervisor_fragment_count == 0 || |
| 3591 | share_state->hypervisor_fragment_count >= |
| 3592 | share_state->fragment_count) { |
| 3593 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3594 | "Retrieve of memory with handle %lx not " |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3595 | "started from hypervisor.\n", |
| 3596 | handle); |
| 3597 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3598 | goto out; |
| 3599 | } |
| 3600 | |
| 3601 | if (memory_region->sender != sender_vm_id) { |
| 3602 | dlog_verbose( |
| 3603 | "Sender ID (%x) is not as expected for memory " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3604 | "handle %lx\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3605 | sender_vm_id, handle); |
| 3606 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3607 | goto out; |
| 3608 | } |
| 3609 | |
| 3610 | fragment_index = share_state->hypervisor_fragment_count; |
| 3611 | |
| 3612 | receiver_index = 0; |
| 3613 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3614 | |
| 3615 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3616 | * Check that the given fragment offset is correct by counting |
| 3617 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3618 | */ |
| 3619 | retrieved_constituents_count = 0; |
| 3620 | for (i = 0; i < fragment_index; ++i) { |
| 3621 | retrieved_constituents_count += |
| 3622 | share_state->fragment_constituent_counts[i]; |
| 3623 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3624 | |
| 3625 | CHECK(memory_region->receiver_count > 0); |
| 3626 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3627 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3628 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3629 | memory_region, retrieved_constituents_count, |
| 3630 | to_locked.vm->ffa_version); |
| 3631 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3632 | if (fragment_offset != expected_fragment_offset) { |
| 3633 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 3634 | fragment_offset, expected_fragment_offset); |
| 3635 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3636 | goto out; |
| 3637 | } |
| 3638 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3639 | /* |
| 3640 | * When hafnium is the hypervisor, acquire the RX buffer of a VM, that |
| 3641 | * is currently ownder by the SPMC. |
| 3642 | */ |
| 3643 | assert(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3644 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3645 | remaining_constituent_count = ffa_memory_fragment_init( |
| 3646 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3647 | share_state->fragments[fragment_index], |
| 3648 | share_state->fragment_constituent_counts[fragment_index], |
| 3649 | &fragment_length); |
| 3650 | CHECK(remaining_constituent_count == 0); |
J-Alves | 674e4de | 2024-01-17 16:20:32 +0000 | [diff] [blame] | 3651 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3652 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 3653 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3654 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3655 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 3656 | share_state->retrieved_fragment_count[receiver_index]++; |
| 3657 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3658 | share_state->fragment_count) { |
| 3659 | ffa_memory_retrieve_complete(share_states, share_state, |
| 3660 | page_pool); |
| 3661 | } |
| 3662 | } else { |
| 3663 | share_state->hypervisor_fragment_count++; |
| 3664 | |
| 3665 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 3666 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3667 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 3668 | .arg1 = (uint32_t)handle, |
| 3669 | .arg2 = (uint32_t)(handle >> 32), |
| 3670 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3671 | |
| 3672 | out: |
| 3673 | share_states_unlock(&share_states); |
| 3674 | dump_share_states(); |
| 3675 | return ret; |
| 3676 | } |
| 3677 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3678 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3679 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3680 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3681 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3682 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3683 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3684 | struct ffa_memory_share_state *share_state; |
| 3685 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3686 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3687 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3688 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3689 | bool receivers_relinquished_memory; |
Karl Meakin | 84710f3 | 2023-10-12 15:14:49 +0100 | [diff] [blame] | 3690 | ffa_memory_access_permissions_t receiver_permissions = {0}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3691 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3692 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3693 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3694 | "Stream endpoints not supported (got %d " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 3695 | "endpoints on FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3696 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3697 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3698 | } |
| 3699 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3700 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3701 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3702 | "VM ID %d in relinquish message doesn't match " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 3703 | "calling VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3704 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3705 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3706 | } |
| 3707 | |
| 3708 | dump_share_states(); |
| 3709 | |
| 3710 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3711 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3712 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3713 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3714 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3715 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3716 | goto out; |
| 3717 | } |
| 3718 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3719 | if (!share_state->sending_complete) { |
| 3720 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3721 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3722 | "relinquish.\n", |
| 3723 | handle); |
| 3724 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3725 | goto out; |
| 3726 | } |
| 3727 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3728 | memory_region = share_state->memory_region; |
| 3729 | CHECK(memory_region != NULL); |
| 3730 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3731 | receiver_index = ffa_memory_region_get_receiver_index( |
| 3732 | memory_region, from_locked.vm->id); |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3733 | |
| 3734 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3735 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3736 | "VM ID %d tried to relinquish memory region " |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3737 | "with handle %#lx and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3738 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3739 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3740 | goto out; |
| 3741 | } |
| 3742 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3743 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3744 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3745 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3746 | "Memory with handle %#lx not yet fully " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3747 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3748 | "receiver %x can't relinquish.\n", |
| 3749 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3750 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3751 | goto out; |
| 3752 | } |
| 3753 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3754 | /* |
| 3755 | * Either clear if requested in relinquish call, or in a retrieve |
| 3756 | * request from one of the borrowers. |
| 3757 | */ |
| 3758 | receivers_relinquished_memory = true; |
| 3759 | |
| 3760 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3761 | struct ffa_memory_access *receiver = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3762 | ffa_memory_region_get_receiver(memory_region, i); |
| 3763 | assert(receiver != NULL); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3764 | if (receiver->receiver_permissions.receiver == |
| 3765 | from_locked.vm->id) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3766 | receiver_permissions = |
| 3767 | receiver->receiver_permissions.permissions; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3768 | continue; |
| 3769 | } |
| 3770 | |
| 3771 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 3772 | receivers_relinquished_memory = false; |
| 3773 | break; |
| 3774 | } |
| 3775 | } |
| 3776 | |
| 3777 | clear = receivers_relinquished_memory && |
Daniel Boulby | 2e14ebe | 2024-01-15 16:21:44 +0000 | [diff] [blame] | 3778 | ((relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 3779 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3780 | |
| 3781 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3782 | * Clear is not allowed for memory that was shared, as the |
| 3783 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3784 | */ |
J-Alves | 95fbb31 | 2024-03-20 15:19:16 +0000 | [diff] [blame] | 3785 | if (clear && (share_state->share_func == FFA_MEM_SHARE_32 || |
| 3786 | share_state->share_func == FFA_MEM_SHARE_64)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3787 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3788 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3789 | goto out; |
| 3790 | } |
| 3791 | |
J-Alves | b886d49 | 2024-04-15 10:55:29 +0100 | [diff] [blame] | 3792 | if (clear && receiver_permissions.data_access == FFA_DATA_ACCESS_RO) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3793 | dlog_verbose("%s: RO memory can't use clear memory flag.\n", |
| 3794 | __func__); |
| 3795 | ret = ffa_error(FFA_DENIED); |
| 3796 | goto out; |
| 3797 | } |
| 3798 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3799 | ret = ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3800 | from_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3801 | share_state->fragment_constituent_counts, |
| 3802 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3803 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3804 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3805 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3806 | * Mark memory handle as not retrieved, so it can be |
| 3807 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3808 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3809 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3810 | } |
| 3811 | |
| 3812 | out: |
| 3813 | share_states_unlock(&share_states); |
| 3814 | dump_share_states(); |
| 3815 | return ret; |
| 3816 | } |
| 3817 | |
| 3818 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3819 | * Validates that the reclaim transition is allowed for the given |
| 3820 | * handle, updates the page table of the reclaiming VM, and frees the |
| 3821 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3822 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3823 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3824 | ffa_memory_handle_t handle, |
| 3825 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3826 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3827 | { |
| 3828 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3829 | struct ffa_memory_share_state *share_state; |
| 3830 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3831 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3832 | |
| 3833 | dump_share_states(); |
| 3834 | |
| 3835 | share_states = share_states_lock(); |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 3836 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3837 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3838 | if (share_state == NULL) { |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3839 | dlog_verbose("Invalid handle %#lx for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3840 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3841 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3842 | goto out; |
| 3843 | } |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3844 | memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3845 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3846 | CHECK(memory_region != NULL); |
| 3847 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3848 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 3849 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3850 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3851 | "VM %#x attempted to reclaim memory handle %#lx " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 3852 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3853 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3854 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3855 | goto out; |
| 3856 | } |
| 3857 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3858 | if (!share_state->sending_complete) { |
| 3859 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3860 | "Memory with handle %#lx not fully sent, can't " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3861 | "reclaim.\n", |
| 3862 | handle); |
| 3863 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3864 | goto out; |
| 3865 | } |
| 3866 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3867 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3868 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 3869 | dlog_verbose( |
Karl Meakin | e8937d9 | 2024-03-19 16:04:25 +0000 | [diff] [blame] | 3870 | "Tried to reclaim memory handle %#lx " |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3871 | "that has not been relinquished by all " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3872 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3873 | handle, |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3874 | ffa_memory_region_get_receiver(memory_region, i) |
| 3875 | ->receiver_permissions.receiver); |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3876 | ret = ffa_error(FFA_DENIED); |
| 3877 | goto out; |
| 3878 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3879 | } |
| 3880 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3881 | ret = ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3882 | to_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3883 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 3884 | share_state->fragment_count, share_state->sender_orig_mode, |
J-Alves | 460d36c | 2023-10-12 17:02:15 +0100 | [diff] [blame] | 3885 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool, |
J-Alves | fd20605 | 2023-05-22 16:45:00 +0100 | [diff] [blame] | 3886 | NULL, share_state->memory_protected); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3887 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3888 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3889 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3890 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3891 | } |
| 3892 | |
| 3893 | out: |
| 3894 | share_states_unlock(&share_states); |
| 3895 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 3896 | } |