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 | |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 11 | #include "hf/arch/mm.h" |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 12 | #include "hf/arch/other_world.h" |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 13 | #include "hf/arch/plat/ffa.h" |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 14 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 15 | #include "hf/addr.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 16 | #include "hf/api.h" |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 17 | #include "hf/assert.h" |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 18 | #include "hf/check.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 19 | #include "hf/dlog.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 20 | #include "hf/ffa.h" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 21 | #include "hf/ffa_internal.h" |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 22 | #include "hf/ffa_memory_internal.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 23 | #include "hf/ffa_partition_manifest.h" |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 24 | #include "hf/mm.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 25 | #include "hf/mpool.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 26 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 27 | #include "hf/vm.h" |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 28 | #include "hf/vm_ids.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 29 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 30 | #include "vmapi/hf/ffa_v1_0.h" |
| 31 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 32 | #define RECEIVERS_COUNT_IN_RETRIEVE_RESP 1 |
| 33 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 34 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 35 | * 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] | 36 | * by this lock. |
| 37 | */ |
| 38 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 39 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 40 | |
| 41 | /** |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 42 | * Return the offset to the first constituent within the |
| 43 | * `ffa_composite_memory_region` for the given receiver from an |
| 44 | * `ffa_memory_region`. The caller must check that the receiver_index is within |
| 45 | * bounds, and that it has a composite memory region offset. |
| 46 | */ |
| 47 | static uint32_t ffa_composite_constituent_offset( |
| 48 | struct ffa_memory_region *memory_region, uint32_t receiver_index) |
| 49 | { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 50 | struct ffa_memory_access *receiver; |
| 51 | uint32_t composite_offset; |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 52 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 53 | CHECK(receiver_index < memory_region->receiver_count); |
| 54 | |
| 55 | receiver = |
| 56 | ffa_memory_region_get_receiver(memory_region, receiver_index); |
| 57 | CHECK(receiver != NULL); |
| 58 | |
| 59 | composite_offset = receiver->composite_memory_region_offset; |
| 60 | |
| 61 | CHECK(composite_offset != 0); |
| 62 | |
| 63 | return composite_offset + sizeof(struct ffa_composite_memory_region); |
J-Alves | ed508c8 | 2023-05-04 16:09:48 +0100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 67 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 68 | */ |
| 69 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 70 | { |
| 71 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 72 | } |
| 73 | |
| 74 | /** |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 75 | * Initialises the next available `struct ffa_memory_share_state`. If `handle` |
| 76 | * is `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, |
| 77 | * otherwise uses the provided handle which is assumed to be globally unique. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 78 | * |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 79 | * Returns a pointer to the allocated `ffa_memory_share_state` on success or |
| 80 | * `NULL` if none are available. |
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 | struct ffa_memory_share_state *allocate_share_state( |
| 83 | struct share_states_locked share_states, uint32_t share_func, |
| 84 | struct ffa_memory_region *memory_region, uint32_t fragment_length, |
| 85 | ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 86 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 87 | assert(share_states.share_states != NULL); |
| 88 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 89 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 90 | for (uint64_t i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 91 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 92 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 93 | &share_states.share_states[i]; |
| 94 | struct ffa_composite_memory_region *composite = |
| 95 | ffa_memory_region_get_composite(memory_region, |
| 96 | 0); |
| 97 | |
| 98 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 99 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 100 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 101 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 102 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 103 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 104 | allocated_state->share_func = share_func; |
| 105 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 106 | allocated_state->fragment_count = 1; |
| 107 | allocated_state->fragments[0] = composite->constituents; |
| 108 | allocated_state->fragment_constituent_counts[0] = |
| 109 | (fragment_length - |
| 110 | ffa_composite_constituent_offset(memory_region, |
| 111 | 0)) / |
| 112 | sizeof(struct ffa_memory_region_constituent); |
| 113 | allocated_state->sending_complete = false; |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 114 | for (uint32_t j = 0; j < MAX_MEM_SHARE_RECIPIENTS; |
| 115 | ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 116 | allocated_state->retrieved_fragment_count[j] = |
| 117 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 118 | } |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 119 | return allocated_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 120 | } |
| 121 | } |
| 122 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 123 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /** Locks the share states lock. */ |
| 127 | struct share_states_locked share_states_lock(void) |
| 128 | { |
| 129 | sl_lock(&share_states_lock_instance); |
| 130 | |
| 131 | return (struct share_states_locked){.share_states = share_states}; |
| 132 | } |
| 133 | |
| 134 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 135 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 136 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 137 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 138 | share_states->share_states = NULL; |
| 139 | sl_unlock(&share_states_lock_instance); |
| 140 | } |
| 141 | |
| 142 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 143 | * 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] | 144 | * returns a pointer to the share state. Otherwise returns NULL. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 145 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 146 | struct ffa_memory_share_state *get_share_state( |
| 147 | struct share_states_locked share_states, ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 148 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 149 | struct ffa_memory_share_state *share_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 150 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 151 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 152 | |
| 153 | /* |
| 154 | * First look for a share_state allocated by us, in which case the |
| 155 | * handle is based on the index. |
| 156 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 157 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 158 | uint64_t index = ffa_memory_handle_get_index(handle); |
| 159 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 160 | if (index < MAX_MEM_SHARES) { |
| 161 | share_state = &share_states.share_states[index]; |
| 162 | if (share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 163 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 164 | } |
| 165 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 166 | } |
| 167 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 168 | /* Fall back to a linear scan. */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 169 | for (uint64_t index = 0; index < MAX_MEM_SHARES; ++index) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 170 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 171 | if (share_state->memory_region != NULL && |
| 172 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 173 | share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 174 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 175 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 178 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 182 | void share_state_free(struct share_states_locked share_states, |
| 183 | struct ffa_memory_share_state *share_state, |
| 184 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 185 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 186 | uint32_t i; |
| 187 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 188 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 189 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 190 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 191 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 192 | /* |
| 193 | * First fragment is part of the same page as the `memory_region`, so it |
| 194 | * doesn't need to be freed separately. |
| 195 | */ |
| 196 | share_state->fragments[0] = NULL; |
| 197 | share_state->fragment_constituent_counts[0] = 0; |
| 198 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 199 | mpool_free(page_pool, share_state->fragments[i]); |
| 200 | share_state->fragments[i] = NULL; |
| 201 | share_state->fragment_constituent_counts[i] = 0; |
| 202 | } |
| 203 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 204 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 205 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 206 | } |
| 207 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 208 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 209 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 210 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 211 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 212 | struct ffa_composite_memory_region *composite; |
| 213 | uint32_t expected_constituent_count; |
| 214 | uint32_t fragment_constituent_count_total = 0; |
| 215 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 216 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 217 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 218 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 219 | |
| 220 | /* |
| 221 | * Share state must already be valid, or it's not possible to get hold |
| 222 | * of it. |
| 223 | */ |
| 224 | CHECK(share_state->memory_region != NULL && |
| 225 | share_state->share_func != 0); |
| 226 | |
| 227 | composite = |
| 228 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 229 | expected_constituent_count = composite->constituent_count; |
| 230 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 231 | fragment_constituent_count_total += |
| 232 | share_state->fragment_constituent_counts[i]; |
| 233 | } |
| 234 | dlog_verbose( |
| 235 | "Checking completion: constituent count %d/%d from %d " |
| 236 | "fragments.\n", |
| 237 | fragment_constituent_count_total, expected_constituent_count, |
| 238 | share_state->fragment_count); |
| 239 | |
| 240 | return fragment_constituent_count_total == expected_constituent_count; |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Calculates the offset of the next fragment expected for the given share |
| 245 | * state. |
| 246 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 247 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 248 | struct share_states_locked share_states, |
| 249 | struct ffa_memory_share_state *share_state) |
| 250 | { |
| 251 | uint32_t next_fragment_offset; |
| 252 | uint32_t i; |
| 253 | |
| 254 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 255 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 256 | |
| 257 | next_fragment_offset = |
| 258 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 259 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 260 | next_fragment_offset += |
| 261 | share_state->fragment_constituent_counts[i] * |
| 262 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 265 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 268 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 269 | { |
| 270 | uint32_t i; |
| 271 | |
| 272 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 273 | return; |
| 274 | } |
| 275 | |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 276 | dlog("from VM %#x, attributes %#x, flags %#x, handle %#x " |
| 277 | "tag %u, memory access descriptor size %u, to %u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 278 | "recipients [", |
| 279 | memory_region->sender, memory_region->attributes, |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 280 | memory_region->flags, memory_region->handle, memory_region->tag, |
| 281 | memory_region->memory_access_desc_size, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 282 | memory_region->receiver_count); |
| 283 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 284 | struct ffa_memory_access *receiver = |
| 285 | ffa_memory_region_get_receiver(memory_region, i); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 286 | if (i != 0) { |
| 287 | dlog(", "); |
| 288 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 289 | dlog("Receiver %#x: %#x (offset %u)", |
| 290 | receiver->receiver_permissions.receiver, |
| 291 | receiver->receiver_permissions.permissions, |
| 292 | receiver->composite_memory_region_offset); |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 293 | /* The impdef field is only present from v1.2 and later */ |
| 294 | if (ffa_version_from_memory_access_desc_size( |
| 295 | memory_region->memory_access_desc_size) >= |
| 296 | MAKE_FFA_VERSION(1, 2)) { |
| 297 | dlog(", impdef: %#x %#x", receiver->impdef.val[0], |
| 298 | receiver->impdef.val[1]); |
| 299 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 300 | } |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 301 | dlog("] at offset %u", memory_region->receivers_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 302 | } |
| 303 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 304 | void dump_share_states(void) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 305 | { |
| 306 | uint32_t i; |
| 307 | |
| 308 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 309 | return; |
| 310 | } |
| 311 | |
| 312 | dlog("Current share states:\n"); |
| 313 | sl_lock(&share_states_lock_instance); |
| 314 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 315 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 316 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 317 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 318 | dlog("SHARE"); |
| 319 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 320 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 321 | dlog("LEND"); |
| 322 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 323 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 324 | dlog("DONATE"); |
| 325 | break; |
| 326 | default: |
| 327 | dlog("invalid share_func %#x", |
| 328 | share_states[i].share_func); |
| 329 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 330 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 331 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 332 | if (share_states[i].sending_complete) { |
| 333 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 334 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 335 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 336 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 337 | dlog(" with %d fragments, %d retrieved, " |
| 338 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 339 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 340 | share_states[i].retrieved_fragment_count[0], |
| 341 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 342 | } |
| 343 | } |
| 344 | sl_unlock(&share_states_lock_instance); |
| 345 | } |
| 346 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 347 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 348 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 349 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 350 | { |
| 351 | uint32_t mode = 0; |
| 352 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 353 | switch (ffa_get_data_access_attr(permissions)) { |
| 354 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 355 | mode = MM_MODE_R; |
| 356 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 357 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 358 | mode = MM_MODE_R | MM_MODE_W; |
| 359 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 360 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 361 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 362 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 363 | case FFA_DATA_ACCESS_RESERVED: |
| 364 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 365 | } |
| 366 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 367 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 368 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 369 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 370 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 371 | mode |= MM_MODE_X; |
| 372 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 373 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 374 | mode |= (default_mode & MM_MODE_X); |
| 375 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 376 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 377 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 378 | } |
| 379 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 380 | /* Set the security state bit if necessary. */ |
| 381 | if ((default_mode & plat_ffa_other_world_mode()) != 0) { |
| 382 | mode |= plat_ffa_other_world_mode(); |
| 383 | } |
| 384 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 385 | return mode; |
| 386 | } |
| 387 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 388 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 389 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 390 | * 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] | 391 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 392 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 393 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 394 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 395 | struct ffa_memory_region_constituent **fragments, |
| 396 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 397 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 398 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 399 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 400 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 401 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 402 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 403 | * Fail if there are no constituents. Otherwise we would get an |
| 404 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 405 | */ |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 406 | dlog_verbose("%s: no constituents\n", __func__); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 407 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 408 | } |
| 409 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 410 | for (i = 0; i < fragment_count; ++i) { |
| 411 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 412 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 413 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 414 | ipaddr_t end = ipa_add(begin, size); |
| 415 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 416 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 417 | /* Fail if addresses are not page-aligned. */ |
| 418 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 419 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 420 | dlog_verbose("%s: addresses not page-aligned\n", |
| 421 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 422 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 423 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 424 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 425 | /* |
| 426 | * Ensure that this constituent memory range is all |
| 427 | * mapped with the same mode. |
| 428 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 429 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 430 | dlog_verbose( |
| 431 | "%s: constituent memory range %#x..%#x " |
| 432 | "not mapped with the same mode\n", |
| 433 | __func__, begin, end); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 434 | return ffa_error(FFA_DENIED); |
| 435 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 436 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 437 | /* |
| 438 | * Ensure that all constituents are mapped with the same |
| 439 | * mode. |
| 440 | */ |
| 441 | if (i == 0) { |
| 442 | *orig_mode = current_mode; |
| 443 | } else if (current_mode != *orig_mode) { |
| 444 | dlog_verbose( |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 445 | "%s: expected mode %#x but was %#x for " |
| 446 | "%d pages at %#x.\n", |
| 447 | __func__, *orig_mode, current_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 448 | fragments[i][j].page_count, |
| 449 | ipa_addr(begin)); |
| 450 | return ffa_error(FFA_DENIED); |
| 451 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 452 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 453 | } |
| 454 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 455 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 456 | } |
| 457 | |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 458 | uint32_t ffa_version_from_memory_access_desc_size( |
| 459 | uint32_t memory_access_desc_size) |
| 460 | { |
| 461 | switch (memory_access_desc_size) { |
| 462 | /* |
| 463 | * v1.0 and v1.1 memory access descriptors are the same size however |
| 464 | * v1.1 is the first version to include the memory access descriptor |
| 465 | * size field so return v1.1. |
| 466 | */ |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 467 | case sizeof(struct ffa_memory_access_v1_0): |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 468 | return MAKE_FFA_VERSION(1, 1); |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 469 | case sizeof(struct ffa_memory_access): |
| 470 | return MAKE_FFA_VERSION(1, 2); |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 471 | } |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * Check if the receivers size and offset given is valid for the senders |
| 477 | * FF-A version. |
| 478 | */ |
| 479 | static bool receiver_size_and_offset_valid_for_version( |
| 480 | uint32_t receivers_size, uint32_t receivers_offset, |
| 481 | uint32_t ffa_version) |
| 482 | { |
| 483 | /* |
| 484 | * Check that the version that the memory access descriptor size belongs |
| 485 | * to is compatible with the FF-A version we believe the sender to be. |
| 486 | */ |
| 487 | uint32_t expected_ffa_version = |
| 488 | ffa_version_from_memory_access_desc_size(receivers_size); |
| 489 | if (!FFA_VERSIONS_ARE_COMPATIBLE(expected_ffa_version, ffa_version)) { |
| 490 | return false; |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * Check the receivers_offset matches the version we found from |
| 495 | * memory access descriptor size. |
| 496 | */ |
| 497 | switch (expected_ffa_version) { |
| 498 | case MAKE_FFA_VERSION(1, 1): |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 499 | case MAKE_FFA_VERSION(1, 2): |
Daniel Boulby | c7dc932 | 2023-10-27 15:12:07 +0100 | [diff] [blame] | 500 | return receivers_offset == sizeof(struct ffa_memory_region); |
| 501 | default: |
| 502 | return false; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Check the values set for fields in the memory region are valid and safe. |
| 508 | * Offset values are within safe bounds, receiver count will not cause overflows |
| 509 | * and reserved fields are 0. |
| 510 | */ |
| 511 | bool ffa_memory_region_sanity_check(struct ffa_memory_region *memory_region, |
| 512 | uint32_t ffa_version, |
| 513 | uint32_t fragment_length, |
| 514 | bool send_transaction) |
| 515 | { |
| 516 | uint32_t receiver_count; |
| 517 | struct ffa_memory_access *receiver; |
| 518 | uint32_t composite_offset_0; |
| 519 | |
| 520 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 521 | struct ffa_memory_region_v1_0 *memory_region_v1_0 = |
| 522 | (struct ffa_memory_region_v1_0 *)memory_region; |
| 523 | /* Check the reserved fields are 0. */ |
| 524 | if (memory_region_v1_0->reserved_0 != 0 || |
| 525 | memory_region_v1_0->reserved_1 != 0) { |
| 526 | dlog_verbose("Reserved fields must be 0.\n"); |
| 527 | return false; |
| 528 | } |
| 529 | |
| 530 | receiver_count = memory_region_v1_0->receiver_count; |
| 531 | } else { |
| 532 | uint32_t receivers_size = |
| 533 | memory_region->memory_access_desc_size; |
| 534 | uint32_t receivers_offset = memory_region->receivers_offset; |
| 535 | |
| 536 | /* Check the reserved field is 0. */ |
| 537 | if (memory_region->reserved[0] != 0 || |
| 538 | memory_region->reserved[1] != 0 || |
| 539 | memory_region->reserved[2] != 0) { |
| 540 | dlog_verbose("Reserved fields must be 0.\n"); |
| 541 | return false; |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Check memory_access_desc_size matches the size of the struct |
| 546 | * for the senders FF-A version. |
| 547 | */ |
| 548 | if (!receiver_size_and_offset_valid_for_version( |
| 549 | receivers_size, receivers_offset, ffa_version)) { |
| 550 | dlog_verbose( |
| 551 | "Invalid memory access descriptor size %d, " |
| 552 | " or receiver offset %d, " |
| 553 | "for FF-A version %#x\n", |
| 554 | receivers_size, receivers_offset, ffa_version); |
| 555 | return false; |
| 556 | } |
| 557 | |
| 558 | receiver_count = memory_region->receiver_count; |
| 559 | } |
| 560 | |
| 561 | /* Check receiver count is not too large. */ |
| 562 | if (receiver_count > MAX_MEM_SHARE_RECIPIENTS) { |
| 563 | dlog_verbose( |
| 564 | "Max number of recipients supported is %u " |
| 565 | "specified %u\n", |
| 566 | MAX_MEM_SHARE_RECIPIENTS, receiver_count); |
| 567 | return false; |
| 568 | } |
| 569 | |
| 570 | /* Check values in the memory access descriptors. */ |
| 571 | /* |
| 572 | * The composite offset values must be the same for all recievers so |
| 573 | * check the first one is valid and then they are all the same. |
| 574 | */ |
| 575 | receiver = ffa_version == MAKE_FFA_VERSION(1, 0) |
| 576 | ? (struct ffa_memory_access *)&( |
| 577 | (struct ffa_memory_region_v1_0 *) |
| 578 | memory_region) |
| 579 | ->receivers[0] |
| 580 | : ffa_memory_region_get_receiver(memory_region, 0); |
| 581 | assert(receiver != NULL); |
| 582 | composite_offset_0 = receiver->composite_memory_region_offset; |
| 583 | |
| 584 | if (!send_transaction) { |
| 585 | if (composite_offset_0 != 0) { |
| 586 | dlog_verbose( |
| 587 | "Composite offset memory region descriptor " |
| 588 | "offset must be 0 for retrieve requests. " |
| 589 | "Currently %d", |
| 590 | composite_offset_0); |
| 591 | return false; |
| 592 | } |
| 593 | } else { |
| 594 | bool comp_offset_is_zero = composite_offset_0 == 0U; |
| 595 | bool comp_offset_lt_transaction_descriptor_size = |
| 596 | composite_offset_0 < |
| 597 | (sizeof(struct ffa_memory_region) + |
| 598 | (uint32_t)(memory_region->memory_access_desc_size * |
| 599 | memory_region->receiver_count)); |
| 600 | bool comp_offset_with_comp_gt_fragment_length = |
| 601 | composite_offset_0 + |
| 602 | sizeof(struct ffa_composite_memory_region) > |
| 603 | fragment_length; |
| 604 | if (comp_offset_is_zero || |
| 605 | comp_offset_lt_transaction_descriptor_size || |
| 606 | comp_offset_with_comp_gt_fragment_length) { |
| 607 | dlog_verbose( |
| 608 | "Invalid composite memory region descriptor " |
| 609 | "offset for send transaction %u\n", |
| 610 | composite_offset_0); |
| 611 | return false; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | for (int i = 0; i < memory_region->receiver_count; i++) { |
| 616 | uint32_t composite_offset; |
| 617 | |
| 618 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 619 | struct ffa_memory_region_v1_0 *memory_region_v1_0 = |
| 620 | (struct ffa_memory_region_v1_0 *)memory_region; |
| 621 | |
| 622 | struct ffa_memory_access_v1_0 *receiver_v1_0 = |
| 623 | &memory_region_v1_0->receivers[i]; |
| 624 | /* Check reserved fields are 0 */ |
| 625 | if (receiver_v1_0->reserved_0 != 0) { |
| 626 | dlog_verbose( |
| 627 | "Reserved field in the memory access " |
| 628 | " descriptor must be zero " |
| 629 | " Currently reciever %d has a reserved " |
| 630 | " field with a value of %d\n", |
| 631 | i, receiver_v1_0->reserved_0); |
| 632 | return false; |
| 633 | } |
| 634 | /* |
| 635 | * We can cast to the current version receiver as the |
| 636 | * remaining fields we are checking have the same |
| 637 | * offsets for all versions since memory access |
| 638 | * descriptors are forwards compatible. |
| 639 | */ |
| 640 | receiver = (struct ffa_memory_access *)receiver_v1_0; |
| 641 | } else { |
| 642 | receiver = ffa_memory_region_get_receiver(memory_region, |
| 643 | i); |
| 644 | assert(receiver != NULL); |
| 645 | |
| 646 | if (receiver->reserved_0 != 0) { |
| 647 | dlog_verbose( |
| 648 | "Reserved field in the memory access " |
| 649 | " descriptor must be zero " |
| 650 | " Currently reciever %d has a reserved " |
| 651 | " field with a value of %d\n", |
| 652 | i, receiver->reserved_0); |
| 653 | return false; |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | /* Check composite offset values are equal for all receivers. */ |
| 658 | composite_offset = receiver->composite_memory_region_offset; |
| 659 | if (composite_offset != composite_offset_0) { |
| 660 | dlog_verbose( |
| 661 | "Composite offset %x differs from %x in index " |
| 662 | "%u\n", |
| 663 | composite_offset, composite_offset_0); |
| 664 | return false; |
| 665 | } |
| 666 | } |
| 667 | return true; |
| 668 | } |
| 669 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 670 | /** |
| 671 | * Verify that all pages have the same mode, that the starting mode |
| 672 | * constitutes a valid state and obtain the next mode to apply |
| 673 | * to the sending VM. |
| 674 | * |
| 675 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 676 | * 1) FFA_DENIED if a state transition was not found; |
| 677 | * 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] | 678 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 679 | * 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] | 680 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 681 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 682 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 683 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 684 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 685 | struct vm_locked from, uint32_t share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 686 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 687 | uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 688 | struct ffa_memory_region_constituent **fragments, |
| 689 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 690 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 691 | { |
| 692 | const uint32_t state_mask = |
| 693 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 694 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 695 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 696 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 697 | fragment_constituent_counts, |
| 698 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 699 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 700 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 701 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 702 | } |
| 703 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 704 | /* Ensure the address range is normal memory and not a device. */ |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 705 | if ((*orig_from_mode & MM_MODE_D) != 0U) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 706 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 707 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 708 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | /* |
| 712 | * Ensure the sender is the owner and has exclusive access to the |
| 713 | * memory. |
| 714 | */ |
| 715 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 716 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 717 | } |
| 718 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 719 | assert(receivers != NULL && receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 720 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 721 | for (uint32_t i = 0U; i < receivers_count; i++) { |
| 722 | ffa_memory_access_permissions_t permissions = |
| 723 | receivers[i].receiver_permissions.permissions; |
| 724 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 725 | permissions, *orig_from_mode); |
| 726 | |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 727 | /* |
| 728 | * The assumption is that at this point, the operation from |
| 729 | * SP to a receiver VM, should have returned an FFA_ERROR |
| 730 | * already. |
| 731 | */ |
| 732 | if (!ffa_is_vm_id(from.vm->id)) { |
| 733 | assert(!ffa_is_vm_id( |
| 734 | receivers[i].receiver_permissions.receiver)); |
| 735 | } |
| 736 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 737 | if ((*orig_from_mode & required_from_mode) != |
| 738 | required_from_mode) { |
| 739 | dlog_verbose( |
| 740 | "Sender tried to send memory with permissions " |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 741 | "which required mode %#x but only had %#x " |
| 742 | "itself.\n", |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 743 | required_from_mode, *orig_from_mode); |
| 744 | return ffa_error(FFA_DENIED); |
| 745 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | /* Find the appropriate new mode. */ |
| 749 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 750 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 751 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 752 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 753 | break; |
| 754 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 755 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 756 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 757 | break; |
| 758 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 759 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 760 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 761 | break; |
| 762 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 763 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 764 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 765 | } |
| 766 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 767 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 768 | } |
| 769 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 770 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 771 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 772 | struct ffa_memory_region_constituent **fragments, |
| 773 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 774 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 775 | { |
| 776 | const uint32_t state_mask = |
| 777 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 778 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 779 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 780 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 781 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 782 | fragment_constituent_counts, |
| 783 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 784 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 785 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | /* Ensure the address range is normal memory and not a device. */ |
| 789 | if (*orig_from_mode & MM_MODE_D) { |
| 790 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 791 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 792 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | /* |
| 796 | * Ensure the relinquishing VM is not the owner but has access to the |
| 797 | * memory. |
| 798 | */ |
| 799 | orig_from_state = *orig_from_mode & state_mask; |
| 800 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 801 | dlog_verbose( |
| 802 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 803 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 804 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 805 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | /* Find the appropriate new mode. */ |
| 809 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 810 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 811 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | /** |
| 815 | * Verify that all pages have the same mode, that the starting mode |
| 816 | * constitutes a valid state and obtain the next mode to apply |
| 817 | * to the retrieving VM. |
| 818 | * |
| 819 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 820 | * 1) FFA_DENIED if a state transition was not found; |
| 821 | * 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] | 822 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 823 | * 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] | 824 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 825 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 826 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 827 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 828 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 829 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 830 | struct ffa_memory_region_constituent **fragments, |
| 831 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 832 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 833 | { |
| 834 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 835 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 836 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 837 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 838 | fragment_constituent_counts, |
| 839 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 840 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 841 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 842 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 843 | } |
| 844 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 845 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 846 | /* |
| 847 | * If the original ffa memory send call has been processed |
| 848 | * successfully, it is expected the orig_to_mode would overlay |
| 849 | * with `state_mask`, as a result of the function |
| 850 | * `ffa_send_check_transition`. |
| 851 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 852 | if (vm_id_is_current_world(to.vm->id)) { |
| 853 | assert((orig_to_mode & |
| 854 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 855 | MM_MODE_SHARED)) != 0U); |
| 856 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 857 | } else { |
| 858 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 859 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 860 | * Ensure the retriever has the expected state. We don't care |
| 861 | * about the MM_MODE_SHARED bit; either with or without it set |
| 862 | * are both valid representations of the !O-NA state. |
| 863 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 864 | if (vm_id_is_current_world(to.vm->id) && |
| 865 | to.vm->id != HF_PRIMARY_VM_ID && |
| 866 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 867 | MM_MODE_UNMAPPED_MASK) { |
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 | |
| 872 | /* Find the appropriate new mode. */ |
| 873 | *to_mode = memory_to_attributes; |
| 874 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 875 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 876 | *to_mode |= 0; |
| 877 | break; |
| 878 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 879 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 880 | *to_mode |= MM_MODE_UNOWNED; |
| 881 | break; |
| 882 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 883 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 884 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 885 | break; |
| 886 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 887 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 888 | *to_mode |= 0; |
| 889 | break; |
| 890 | |
| 891 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 892 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 893 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 894 | } |
| 895 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 896 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 897 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 898 | |
| 899 | /** |
| 900 | * Updates a VM's page table such that the given set of physical address ranges |
| 901 | * are mapped in the address space at the corresponding address ranges, in the |
| 902 | * mode provided. |
| 903 | * |
| 904 | * If commit is false, the page tables will be allocated from the mpool but no |
| 905 | * mappings will actually be updated. This function must always be called first |
| 906 | * with commit false to check that it will succeed before calling with commit |
| 907 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 908 | * series of changes atomically you can call them all with commit false before |
| 909 | * calling them all with commit true. |
| 910 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 911 | * vm_ptable_defrag should always be called after a series of page table |
| 912 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 913 | * |
| 914 | * Returns true on success, or false if the update failed and no changes were |
| 915 | * made to memory mappings. |
| 916 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 917 | bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 918 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 919 | struct ffa_memory_region_constituent **fragments, |
| 920 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 921 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 922 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 923 | uint32_t i; |
| 924 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 925 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 926 | if (vm_locked.vm->el0_partition) { |
| 927 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 928 | } |
| 929 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 930 | /* Iterate over the memory region constituents within each fragment. */ |
| 931 | for (i = 0; i < fragment_count; ++i) { |
| 932 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 933 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 934 | paddr_t pa_begin = |
| 935 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 936 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 937 | uint32_t pa_bits = |
| 938 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 939 | |
| 940 | /* |
| 941 | * Ensure the requested region falls into system's PA |
| 942 | * range. |
| 943 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 944 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 945 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 946 | dlog_error("Region is outside of PA Range\n"); |
| 947 | return false; |
| 948 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 949 | |
| 950 | if (commit) { |
| 951 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 952 | mode, ppool, NULL); |
| 953 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 954 | pa_end, mode, ppool)) { |
| 955 | return false; |
| 956 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 957 | } |
| 958 | } |
| 959 | |
| 960 | return true; |
| 961 | } |
| 962 | |
| 963 | /** |
| 964 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 965 | * flushed from the cache so the memory has been cleared across the system. |
| 966 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 967 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 968 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 969 | { |
| 970 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 971 | * 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] | 972 | * global mapping of the whole range. Such an approach will limit |
| 973 | * the changes to stage-1 tables and will allow only local |
| 974 | * invalidation. |
| 975 | */ |
| 976 | bool ret; |
| 977 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 978 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 979 | MM_MODE_W | (extra_mode_attributes & |
| 980 | plat_ffa_other_world_mode()), |
| 981 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 982 | size_t size = pa_difference(begin, end); |
| 983 | |
| 984 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 985 | goto fail; |
| 986 | } |
| 987 | |
| 988 | memset_s(ptr, size, 0, size); |
| 989 | arch_mm_flush_dcache(ptr, size); |
| 990 | mm_unmap(stage1_locked, begin, end, ppool); |
| 991 | |
| 992 | ret = true; |
| 993 | goto out; |
| 994 | |
| 995 | fail: |
| 996 | ret = false; |
| 997 | |
| 998 | out: |
| 999 | mm_unlock_stage1(&stage1_locked); |
| 1000 | |
| 1001 | return ret; |
| 1002 | } |
| 1003 | |
| 1004 | /** |
| 1005 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 1006 | * flushed from the cache so the memory has been cleared across the system. |
| 1007 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1008 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1009 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1010 | struct ffa_memory_region_constituent **fragments, |
| 1011 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1012 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1013 | { |
| 1014 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1015 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1016 | bool ret = false; |
| 1017 | |
| 1018 | /* |
| 1019 | * Create a local pool so any freed memory can't be used by another |
| 1020 | * thread. This is to ensure each constituent that is mapped can be |
| 1021 | * unmapped again afterwards. |
| 1022 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1023 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1024 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1025 | /* Iterate over the memory region constituents within each fragment. */ |
| 1026 | for (i = 0; i < fragment_count; ++i) { |
| 1027 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1028 | |
J-Alves | 8457f93 | 2023-10-11 16:41:45 +0100 | [diff] [blame] | 1029 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1030 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 1031 | paddr_t begin = |
| 1032 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 1033 | paddr_t end = pa_add(begin, size); |
| 1034 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1035 | if (!clear_memory(begin, end, &local_page_pool, |
| 1036 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1037 | /* |
| 1038 | * api_clear_memory will defrag on failure, so |
| 1039 | * no need to do it here. |
| 1040 | */ |
| 1041 | goto out; |
| 1042 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1043 | } |
| 1044 | } |
| 1045 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1046 | ret = true; |
| 1047 | |
| 1048 | out: |
| 1049 | mpool_fini(&local_page_pool); |
| 1050 | return ret; |
| 1051 | } |
| 1052 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1053 | static bool is_memory_range_within(ipaddr_t begin, ipaddr_t end, |
| 1054 | ipaddr_t in_begin, ipaddr_t in_end) |
| 1055 | { |
| 1056 | return (ipa_addr(begin) >= ipa_addr(in_begin) && |
| 1057 | ipa_addr(begin) < ipa_addr(in_end)) || |
| 1058 | (ipa_addr(end) <= ipa_addr(in_end) && |
| 1059 | ipa_addr(end) > ipa_addr(in_begin)); |
| 1060 | } |
| 1061 | |
| 1062 | /** |
| 1063 | * Receives a memory range and looks for overlaps with the remainder |
| 1064 | * constituents of the memory share/lend/donate operation. Assumes they are |
| 1065 | * passed in order to avoid having to loop over all the elements at each call. |
| 1066 | * The function only compares the received memory ranges with those that follow |
| 1067 | * within the same fragment, and subsequent fragments from the same operation. |
| 1068 | */ |
| 1069 | static bool ffa_memory_check_overlap( |
| 1070 | struct ffa_memory_region_constituent **fragments, |
| 1071 | const uint32_t *fragment_constituent_counts, |
| 1072 | const uint32_t fragment_count, const uint32_t current_fragment, |
| 1073 | const uint32_t current_constituent) |
| 1074 | { |
| 1075 | uint32_t i = current_fragment; |
| 1076 | uint32_t j = current_constituent; |
| 1077 | ipaddr_t current_begin = ipa_init(fragments[i][j].address); |
| 1078 | const uint32_t current_page_count = fragments[i][j].page_count; |
| 1079 | size_t current_size = current_page_count * PAGE_SIZE; |
| 1080 | ipaddr_t current_end = ipa_add(current_begin, current_size - 1); |
| 1081 | |
| 1082 | if (current_size == 0 || |
| 1083 | current_size > UINT64_MAX - ipa_addr(current_begin)) { |
| 1084 | dlog_verbose("Invalid page count. Addr: %x page_count: %x\n", |
| 1085 | current_begin, current_page_count); |
| 1086 | return false; |
| 1087 | } |
| 1088 | |
| 1089 | for (; i < fragment_count; i++) { |
| 1090 | j = (i == current_fragment) ? j + 1 : 0; |
| 1091 | |
| 1092 | for (; j < fragment_constituent_counts[i]; j++) { |
| 1093 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 1094 | const uint32_t page_count = fragments[i][j].page_count; |
| 1095 | size_t size = page_count * PAGE_SIZE; |
| 1096 | ipaddr_t end = ipa_add(begin, size - 1); |
| 1097 | |
| 1098 | if (size == 0 || size > UINT64_MAX - ipa_addr(begin)) { |
| 1099 | dlog_verbose( |
| 1100 | "Invalid page count. Addr: %x " |
| 1101 | "page_count: %x\n", |
| 1102 | begin, page_count); |
| 1103 | return false; |
| 1104 | } |
| 1105 | |
| 1106 | /* |
| 1107 | * Check if current ranges is within begin and end, as |
| 1108 | * well as the reverse. This should help optimize the |
| 1109 | * loop, and reduce the number of iterations. |
| 1110 | */ |
| 1111 | if (is_memory_range_within(begin, end, current_begin, |
| 1112 | current_end) || |
| 1113 | is_memory_range_within(current_begin, current_end, |
| 1114 | begin, end)) { |
| 1115 | dlog_verbose( |
| 1116 | "Overlapping memory ranges: %#x - %#x " |
| 1117 | "with %#x - %#x\n", |
| 1118 | ipa_addr(begin), ipa_addr(end), |
| 1119 | ipa_addr(current_begin), |
| 1120 | ipa_addr(current_end)); |
| 1121 | return true; |
| 1122 | } |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | return false; |
| 1127 | } |
| 1128 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1129 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1130 | * 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] | 1131 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1132 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1133 | * |
| 1134 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1135 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1136 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1137 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1138 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 1139 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1140 | * 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] | 1141 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1142 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1143 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1144 | struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1145 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1146 | struct ffa_memory_region_constituent **fragments, |
| 1147 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1148 | uint32_t composite_total_page_count, uint32_t share_func, |
| 1149 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 1150 | struct mpool *page_pool, bool clear, uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1151 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1152 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1153 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1154 | uint32_t orig_from_mode; |
| 1155 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1156 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1157 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1158 | uint32_t constituents_total_page_count = 0; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1159 | |
| 1160 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1161 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1162 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1163 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1164 | for (i = 0; i < fragment_count; ++i) { |
| 1165 | if (!is_aligned(fragments[i], 8)) { |
| 1166 | dlog_verbose("Constituents not aligned.\n"); |
| 1167 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1168 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1169 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 1170 | constituents_total_page_count += |
| 1171 | fragments[i][j].page_count; |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 1172 | if (ffa_memory_check_overlap( |
| 1173 | fragments, fragment_constituent_counts, |
| 1174 | fragment_count, i, j)) { |
| 1175 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1176 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1177 | } |
| 1178 | } |
| 1179 | |
| 1180 | if (constituents_total_page_count != composite_total_page_count) { |
| 1181 | dlog_verbose( |
| 1182 | "Composite page count differs from calculated page " |
| 1183 | "count from constituents.\n"); |
| 1184 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1185 | } |
| 1186 | |
| 1187 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1188 | * Check if the state transition is lawful for the sender, ensure that |
| 1189 | * all constituents of a memory region being shared are at the same |
| 1190 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1191 | */ |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1192 | ret = ffa_send_check_transition(from_locked, share_func, receivers, |
| 1193 | receivers_count, &orig_from_mode, |
| 1194 | fragments, fragment_constituent_counts, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1195 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1196 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1197 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1198 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1199 | } |
| 1200 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1201 | if (orig_from_mode_ret != NULL) { |
| 1202 | *orig_from_mode_ret = orig_from_mode; |
| 1203 | } |
| 1204 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1205 | /* |
| 1206 | * Create a local pool so any freed memory can't be used by another |
| 1207 | * thread. This is to ensure the original mapping can be restored if the |
| 1208 | * clear fails. |
| 1209 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1210 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1211 | |
| 1212 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1213 | * First reserve all required memory for the new page table entries |
| 1214 | * without committing, to make sure the entire operation will succeed |
| 1215 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1216 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1217 | if (!ffa_region_group_identity_map( |
| 1218 | from_locked, fragments, fragment_constituent_counts, |
| 1219 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1220 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1221 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1222 | goto out; |
| 1223 | } |
| 1224 | |
| 1225 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1226 | * Update the mapping for the sender. This won't allocate because the |
| 1227 | * transaction was already prepared above, but may free pages in the |
| 1228 | * case that a whole block is being unmapped that was previously |
| 1229 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1230 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1231 | CHECK(ffa_region_group_identity_map( |
| 1232 | from_locked, fragments, fragment_constituent_counts, |
| 1233 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1234 | |
| 1235 | /* 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] | 1236 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1237 | !ffa_clear_memory_constituents(orig_from_mode, fragments, |
| 1238 | fragment_constituent_counts, |
| 1239 | fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1240 | /* |
| 1241 | * On failure, roll back by returning memory to the sender. This |
| 1242 | * may allocate pages which were previously freed into |
| 1243 | * `local_page_pool` by the call above, but will never allocate |
| 1244 | * more pages than that so can never fail. |
| 1245 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1246 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1247 | from_locked, fragments, fragment_constituent_counts, |
| 1248 | fragment_count, orig_from_mode, &local_page_pool, |
| 1249 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1250 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1251 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1252 | goto out; |
| 1253 | } |
| 1254 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1255 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1256 | |
| 1257 | out: |
| 1258 | mpool_fini(&local_page_pool); |
| 1259 | |
| 1260 | /* |
| 1261 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1262 | * error) or merging entries into blocks where possible (on success). |
| 1263 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1264 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1265 | |
| 1266 | return ret; |
| 1267 | } |
| 1268 | |
| 1269 | /** |
| 1270 | * Validates and maps memory shared from one VM to another. |
| 1271 | * |
| 1272 | * This function requires the calling context to hold the <to> lock. |
| 1273 | * |
| 1274 | * Returns: |
| 1275 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1276 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1277 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1278 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1279 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1280 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1281 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1282 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1283 | struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1284 | struct ffa_memory_region_constituent **fragments, |
| 1285 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1286 | uint32_t sender_orig_mode, uint32_t share_func, bool clear, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1287 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1288 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1289 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1290 | uint32_t to_mode; |
| 1291 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1292 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1293 | |
| 1294 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1295 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1296 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1297 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1298 | for (i = 0; i < fragment_count; ++i) { |
| 1299 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1300 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1301 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1302 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1303 | } |
| 1304 | |
| 1305 | /* |
| 1306 | * Check if the state transition is lawful for the recipient, and ensure |
| 1307 | * that all constituents of the memory region being retrieved are at the |
| 1308 | * same state. |
| 1309 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1310 | ret = ffa_retrieve_check_transition( |
| 1311 | to_locked, share_func, fragments, fragment_constituent_counts, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1312 | fragment_count, sender_orig_mode, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1313 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1314 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1315 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1316 | } |
| 1317 | |
| 1318 | /* |
| 1319 | * Create a local pool so any freed memory can't be used by another |
| 1320 | * thread. This is to ensure the original mapping can be restored if the |
| 1321 | * clear fails. |
| 1322 | */ |
| 1323 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1324 | |
| 1325 | /* |
| 1326 | * First reserve all required memory for the new page table entries in |
| 1327 | * the recipient page tables without committing, to make sure the entire |
| 1328 | * operation will succeed without exhausting the page pool. |
| 1329 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1330 | if (!ffa_region_group_identity_map( |
| 1331 | to_locked, fragments, fragment_constituent_counts, |
| 1332 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1333 | /* TODO: partial defrag of failed range. */ |
| 1334 | dlog_verbose( |
| 1335 | "Insufficient memory to update recipient page " |
| 1336 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1337 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1338 | goto out; |
| 1339 | } |
| 1340 | |
| 1341 | /* 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] | 1342 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1343 | !ffa_clear_memory_constituents(sender_orig_mode, fragments, |
| 1344 | fragment_constituent_counts, |
| 1345 | fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1346 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1347 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1348 | goto out; |
| 1349 | } |
| 1350 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1351 | /* |
| 1352 | * Complete the transfer by mapping the memory into the recipient. This |
| 1353 | * won't allocate because the transaction was already prepared above, so |
| 1354 | * it doesn't need to use the `local_page_pool`. |
| 1355 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1356 | CHECK(ffa_region_group_identity_map( |
| 1357 | to_locked, fragments, fragment_constituent_counts, |
| 1358 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1359 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1360 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1361 | |
| 1362 | out: |
| 1363 | mpool_fini(&local_page_pool); |
| 1364 | |
| 1365 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1366 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1367 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1368 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1369 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1370 | |
| 1371 | return ret; |
| 1372 | } |
| 1373 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1374 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1375 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1376 | struct ffa_memory_region_constituent **fragments, |
| 1377 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1378 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1379 | { |
| 1380 | uint32_t orig_from_mode; |
| 1381 | uint32_t from_mode; |
| 1382 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1383 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1384 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1385 | ret = ffa_relinquish_check_transition( |
| 1386 | from_locked, &orig_from_mode, fragments, |
| 1387 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1388 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1389 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1390 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1391 | } |
| 1392 | |
| 1393 | /* |
| 1394 | * Create a local pool so any freed memory can't be used by another |
| 1395 | * thread. This is to ensure the original mapping can be restored if the |
| 1396 | * clear fails. |
| 1397 | */ |
| 1398 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1399 | |
| 1400 | /* |
| 1401 | * First reserve all required memory for the new page table entries |
| 1402 | * without committing, to make sure the entire operation will succeed |
| 1403 | * without exhausting the page pool. |
| 1404 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1405 | if (!ffa_region_group_identity_map( |
| 1406 | from_locked, fragments, fragment_constituent_counts, |
| 1407 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1408 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1409 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1410 | goto out; |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | * Update the mapping for the sender. This won't allocate because the |
| 1415 | * transaction was already prepared above, but may free pages in the |
| 1416 | * case that a whole block is being unmapped that was previously |
| 1417 | * partially mapped. |
| 1418 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1419 | CHECK(ffa_region_group_identity_map( |
| 1420 | from_locked, fragments, fragment_constituent_counts, |
| 1421 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1422 | |
| 1423 | /* 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] | 1424 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1425 | !ffa_clear_memory_constituents(orig_from_mode, fragments, |
| 1426 | fragment_constituent_counts, |
| 1427 | fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1428 | /* |
| 1429 | * On failure, roll back by returning memory to the sender. This |
| 1430 | * may allocate pages which were previously freed into |
| 1431 | * `local_page_pool` by the call above, but will never allocate |
| 1432 | * more pages than that so can never fail. |
| 1433 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1434 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1435 | from_locked, fragments, fragment_constituent_counts, |
| 1436 | fragment_count, orig_from_mode, &local_page_pool, |
| 1437 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1438 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1439 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1440 | goto out; |
| 1441 | } |
| 1442 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1443 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1444 | |
| 1445 | out: |
| 1446 | mpool_fini(&local_page_pool); |
| 1447 | |
| 1448 | /* |
| 1449 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1450 | * error) or merging entries into blocks where possible (on success). |
| 1451 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1452 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1453 | |
| 1454 | return ret; |
| 1455 | } |
| 1456 | |
| 1457 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1458 | * Complete a memory sending operation by checking that it is valid, updating |
| 1459 | * the sender page table, and then either marking the share state as having |
| 1460 | * completed sending (on success) or freeing it (on failure). |
| 1461 | * |
| 1462 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1463 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1464 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1465 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1466 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1467 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1468 | { |
| 1469 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1470 | struct ffa_composite_memory_region *composite; |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1471 | struct ffa_memory_access *receiver; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1472 | struct ffa_value ret; |
| 1473 | |
| 1474 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1475 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1476 | assert(memory_region != NULL); |
| 1477 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1478 | assert(composite != NULL); |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1479 | receiver = ffa_memory_region_get_receiver(memory_region, 0); |
| 1480 | assert(receiver != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1481 | |
| 1482 | /* Check that state is valid in sender page table and update. */ |
| 1483 | ret = ffa_send_check_update( |
| 1484 | from_locked, share_state->fragments, |
| 1485 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1486 | share_state->fragment_count, composite->page_count, |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1487 | share_state->share_func, receiver, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1488 | memory_region->receiver_count, page_pool, |
| 1489 | memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1490 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1491 | if (ret.func != FFA_SUCCESS_32) { |
| 1492 | /* |
| 1493 | * Free share state, it failed to send so it can't be retrieved. |
| 1494 | */ |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1495 | dlog_verbose("%s: failed to send check update: %s(%s)\n", |
| 1496 | __func__, ffa_func_name(ret.func), |
| 1497 | ffa_error_name(ffa_error_code(ret))); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1498 | share_state_free(share_states, share_state, page_pool); |
| 1499 | return ret; |
| 1500 | } |
| 1501 | |
| 1502 | share_state->sending_complete = true; |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1503 | dlog_verbose("%s: marked sending complete.\n", __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1504 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1505 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1506 | } |
| 1507 | |
| 1508 | /** |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1509 | * Check that the memory attributes match Hafnium expectations: |
| 1510 | * Normal Memory, Inner shareable, Write-Back Read-Allocate |
| 1511 | * Write-Allocate Cacheable. |
| 1512 | */ |
| 1513 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1514 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1515 | { |
| 1516 | enum ffa_memory_type memory_type; |
| 1517 | enum ffa_memory_cacheability cacheability; |
| 1518 | enum ffa_memory_shareability shareability; |
| 1519 | |
| 1520 | memory_type = ffa_get_memory_type_attr(attributes); |
| 1521 | if (memory_type != FFA_MEMORY_NORMAL_MEM) { |
| 1522 | dlog_verbose("Invalid memory type %#x, expected %#x.\n", |
| 1523 | memory_type, FFA_MEMORY_NORMAL_MEM); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1524 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1525 | } |
| 1526 | |
| 1527 | cacheability = ffa_get_memory_cacheability_attr(attributes); |
| 1528 | if (cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1529 | dlog_verbose("Invalid cacheability %#x, expected %#x.\n", |
| 1530 | cacheability, FFA_MEMORY_CACHE_WRITE_BACK); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1531 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1532 | } |
| 1533 | |
| 1534 | shareability = ffa_get_memory_shareability_attr(attributes); |
| 1535 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
| 1536 | dlog_verbose("Invalid shareability %#x, expected #%x.\n", |
| 1537 | shareability, FFA_MEMORY_INNER_SHAREABLE); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1538 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1539 | } |
| 1540 | |
| 1541 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1542 | } |
| 1543 | |
| 1544 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1545 | * Check that the given `memory_region` represents a valid memory send request |
| 1546 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1547 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1548 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1549 | * 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] | 1550 | * not. |
| 1551 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1552 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1553 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1554 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1555 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1556 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1557 | struct ffa_composite_memory_region *composite; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1558 | struct ffa_memory_access *receiver = |
| 1559 | ffa_memory_region_get_receiver(memory_region, 0); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1560 | uint64_t receivers_end; |
| 1561 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1562 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1563 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1564 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1565 | enum ffa_data_access data_access; |
| 1566 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1567 | enum ffa_memory_security security_state; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1568 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1569 | const size_t minimum_first_fragment_length = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1570 | memory_region->receivers_offset + |
| 1571 | memory_region->memory_access_desc_size + |
| 1572 | sizeof(struct ffa_composite_memory_region); |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1573 | |
| 1574 | if (fragment_length < minimum_first_fragment_length) { |
| 1575 | dlog_verbose("Fragment length %u too short (min %u).\n", |
| 1576 | (size_t)fragment_length, |
| 1577 | minimum_first_fragment_length); |
| 1578 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1579 | } |
| 1580 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1581 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1582 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1583 | if (!is_aligned(fragment_length, |
| 1584 | sizeof(struct ffa_memory_region_constituent)) || |
| 1585 | !is_aligned(memory_share_length, |
| 1586 | sizeof(struct ffa_memory_region_constituent))) { |
| 1587 | dlog_verbose( |
| 1588 | "Fragment length %u or total length %u" |
| 1589 | " is not 16-byte aligned.\n", |
| 1590 | fragment_length, memory_share_length); |
| 1591 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1592 | } |
| 1593 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1594 | if (fragment_length > memory_share_length) { |
| 1595 | dlog_verbose( |
| 1596 | "Fragment length %u greater than total length %u.\n", |
| 1597 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1598 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1599 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1600 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1601 | /* The sender must match the caller. */ |
| 1602 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1603 | vm_id_is_current_world(memory_region->sender)) || |
| 1604 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1605 | memory_region->sender != from_locked.vm->id)) { |
| 1606 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1607 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1608 | } |
| 1609 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1610 | if (memory_region->receiver_count <= 0) { |
| 1611 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1612 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1613 | } |
| 1614 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1615 | /* |
| 1616 | * Ensure that the composite header is within the memory bounds and |
| 1617 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 1618 | * to prevent overflow. |
| 1619 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1620 | receivers_end = ((uint64_t)memory_region->memory_access_desc_size * |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1621 | (uint64_t)memory_region->receiver_count) + |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 1622 | memory_region->receivers_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1623 | min_length = receivers_end + |
| 1624 | sizeof(struct ffa_composite_memory_region) + |
| 1625 | sizeof(struct ffa_memory_region_constituent); |
| 1626 | if (min_length > memory_share_length) { |
| 1627 | dlog_verbose("Share too short: got %u but minimum is %u.\n", |
| 1628 | (size_t)memory_share_length, (size_t)min_length); |
| 1629 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1630 | } |
| 1631 | |
| 1632 | composite_memory_region_offset = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1633 | receiver->composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1634 | |
| 1635 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1636 | * Check that the composite memory region descriptor is after the access |
| 1637 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 1638 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1639 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1640 | if ((composite_memory_region_offset < receivers_end) || |
| 1641 | (composite_memory_region_offset % 16 != 0) || |
| 1642 | (composite_memory_region_offset > |
| 1643 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 1644 | dlog_verbose( |
| 1645 | "Invalid composite memory region descriptor offset " |
| 1646 | "%u.\n", |
| 1647 | (size_t)composite_memory_region_offset); |
| 1648 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * Compute the start of the constituent regions. Already checked |
| 1653 | * to be not more than fragment_length and thus not more than |
| 1654 | * memory_share_length. |
| 1655 | */ |
| 1656 | constituents_start = composite_memory_region_offset + |
| 1657 | sizeof(struct ffa_composite_memory_region); |
| 1658 | constituents_length = memory_share_length - constituents_start; |
| 1659 | |
| 1660 | /* |
| 1661 | * Check that the number of constituents is consistent with the length |
| 1662 | * of the constituent region. |
| 1663 | */ |
| 1664 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1665 | if ((constituents_length % |
| 1666 | sizeof(struct ffa_memory_region_constituent) != |
| 1667 | 0) || |
| 1668 | ((constituents_length / |
| 1669 | sizeof(struct ffa_memory_region_constituent)) != |
| 1670 | composite->constituent_count)) { |
| 1671 | dlog_verbose("Invalid length %u or composite offset %u.\n", |
| 1672 | (size_t)memory_share_length, |
| 1673 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1674 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1675 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1676 | if (fragment_length < memory_share_length && |
| 1677 | fragment_length < HF_MAILBOX_SIZE) { |
| 1678 | dlog_warning( |
| 1679 | "Initial fragment length %d smaller than mailbox " |
| 1680 | "size.\n", |
| 1681 | fragment_length); |
| 1682 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1683 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1684 | /* |
| 1685 | * Clear is not allowed for memory sharing, as the sender still has |
| 1686 | * access to the memory. |
| 1687 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1688 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1689 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1690 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1691 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1692 | } |
| 1693 | |
| 1694 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1695 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1696 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1697 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1698 | } |
| 1699 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1700 | /* Check that the permissions are valid, for each specified receiver. */ |
| 1701 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1702 | struct ffa_memory_region_attributes receiver_permissions; |
| 1703 | |
| 1704 | receiver = ffa_memory_region_get_receiver(memory_region, i); |
| 1705 | assert(receiver != NULL); |
| 1706 | receiver_permissions = receiver->receiver_permissions; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1707 | ffa_memory_access_permissions_t permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1708 | receiver_permissions.permissions; |
| 1709 | ffa_id_t receiver_id = receiver_permissions.receiver; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1710 | |
| 1711 | if (memory_region->sender == receiver_id) { |
| 1712 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1713 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1714 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 1715 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1716 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 1717 | j++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1718 | struct ffa_memory_access *other_receiver = |
| 1719 | ffa_memory_region_get_receiver(memory_region, |
| 1720 | j); |
| 1721 | assert(other_receiver != NULL); |
| 1722 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1723 | if (receiver_id == |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1724 | other_receiver->receiver_permissions.receiver) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1725 | dlog_verbose( |
| 1726 | "Repeated receiver(%x) in memory send " |
| 1727 | "operation.\n", |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1728 | other_receiver->receiver_permissions |
| 1729 | .receiver); |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1730 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1731 | } |
| 1732 | } |
| 1733 | |
| 1734 | if (composite_memory_region_offset != |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1735 | receiver->composite_memory_region_offset) { |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1736 | dlog_verbose( |
| 1737 | "All ffa_memory_access should point to the " |
| 1738 | "same composite memory region offset.\n"); |
| 1739 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1740 | } |
| 1741 | |
| 1742 | data_access = ffa_get_data_access_attr(permissions); |
| 1743 | instruction_access = |
| 1744 | ffa_get_instruction_access_attr(permissions); |
| 1745 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1746 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 1747 | dlog_verbose( |
| 1748 | "Reserved value for receiver permissions " |
| 1749 | "%#x.\n", |
| 1750 | permissions); |
| 1751 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1752 | } |
| 1753 | if (instruction_access != |
| 1754 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 1755 | dlog_verbose( |
| 1756 | "Invalid instruction access permissions %#x " |
| 1757 | "for sending memory.\n", |
| 1758 | permissions); |
| 1759 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1760 | } |
| 1761 | if (share_func == FFA_MEM_SHARE_32) { |
| 1762 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1763 | dlog_verbose( |
| 1764 | "Invalid data access permissions %#x " |
| 1765 | "for sharing memory.\n", |
| 1766 | permissions); |
| 1767 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1768 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1769 | /* |
| 1770 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 1771 | * spec, NX is required for share operations (but must |
| 1772 | * not be specified by the sender) so set it in the |
| 1773 | * copy that we store, ready to be returned to the |
| 1774 | * retriever. |
| 1775 | */ |
| 1776 | if (vm_id_is_current_world(receiver_id)) { |
| 1777 | ffa_set_instruction_access_attr( |
| 1778 | &permissions, |
| 1779 | FFA_INSTRUCTION_ACCESS_NX); |
| 1780 | receiver_permissions.permissions = permissions; |
| 1781 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1782 | } |
| 1783 | if (share_func == FFA_MEM_LEND_32 && |
| 1784 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1785 | dlog_verbose( |
| 1786 | "Invalid data access permissions %#x for " |
| 1787 | "lending memory.\n", |
| 1788 | permissions); |
| 1789 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1790 | } |
| 1791 | |
| 1792 | if (share_func == FFA_MEM_DONATE_32 && |
| 1793 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1794 | dlog_verbose( |
| 1795 | "Invalid data access permissions %#x for " |
| 1796 | "donating memory.\n", |
| 1797 | permissions); |
| 1798 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1799 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1800 | } |
| 1801 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1802 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
| 1803 | security_state = |
| 1804 | ffa_get_memory_security_attr(memory_region->attributes); |
| 1805 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 1806 | dlog_verbose( |
| 1807 | "Invalid security state for memory share operation.\n"); |
| 1808 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1809 | } |
| 1810 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1811 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1812 | * If a memory donate or lend with single borrower, the memory type |
| 1813 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1814 | */ |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1815 | if (share_func == FFA_MEM_DONATE_32 || |
| 1816 | (share_func == FFA_MEM_LEND_32 && |
| 1817 | memory_region->receiver_count == 1)) { |
| 1818 | if (ffa_get_memory_type_attr(memory_region->attributes) != |
| 1819 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 1820 | dlog_verbose( |
| 1821 | "Memory type shall not be specified by " |
| 1822 | "sender.\n"); |
| 1823 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1824 | } |
| 1825 | } else { |
| 1826 | /* |
| 1827 | * Check that sender's memory attributes match Hafnium |
| 1828 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 1829 | * Read-Allocate Write-Allocate Cacheable. |
| 1830 | */ |
| 1831 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 1832 | if (ret.func != FFA_SUCCESS_32) { |
| 1833 | return ret; |
| 1834 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1835 | } |
| 1836 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1837 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1838 | } |
| 1839 | |
| 1840 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1841 | * Gets the share state for continuing an operation to donate, lend or share |
| 1842 | * memory, and checks that it is a valid request. |
| 1843 | * |
| 1844 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1845 | * not. |
| 1846 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1847 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1848 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1849 | 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] | 1850 | struct mpool *page_pool) |
| 1851 | { |
| 1852 | struct ffa_memory_share_state *share_state; |
| 1853 | struct ffa_memory_region *memory_region; |
| 1854 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1855 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1856 | |
| 1857 | /* |
| 1858 | * Look up the share state by handle and make sure that the VM ID |
| 1859 | * matches. |
| 1860 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 1861 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 1862 | if (share_state == NULL) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1863 | dlog_verbose( |
| 1864 | "Invalid handle %#x for memory send continuation.\n", |
| 1865 | handle); |
| 1866 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1867 | } |
| 1868 | memory_region = share_state->memory_region; |
| 1869 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1870 | if (vm_id_is_current_world(from_vm_id) && |
| 1871 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1872 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1873 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1874 | } |
| 1875 | |
| 1876 | if (share_state->sending_complete) { |
| 1877 | dlog_verbose( |
| 1878 | "Sending of memory handle %#x is already complete.\n", |
| 1879 | handle); |
| 1880 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1881 | } |
| 1882 | |
| 1883 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1884 | /* |
| 1885 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1886 | * probably be increased. |
| 1887 | */ |
| 1888 | dlog_warning( |
| 1889 | "Too many fragments for memory share with handle %#x; " |
| 1890 | "only %d supported.\n", |
| 1891 | handle, MAX_FRAGMENTS); |
| 1892 | /* Free share state, as it's not possible to complete it. */ |
| 1893 | share_state_free(share_states, share_state, page_pool); |
| 1894 | return ffa_error(FFA_NO_MEMORY); |
| 1895 | } |
| 1896 | |
| 1897 | *share_state_ret = share_state; |
| 1898 | |
| 1899 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1900 | } |
| 1901 | |
| 1902 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1903 | * Checks if there is at least one receiver from the other world. |
| 1904 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1905 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1906 | struct ffa_memory_region *memory_region) |
| 1907 | { |
| 1908 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 1909 | struct ffa_memory_access *receiver = |
| 1910 | ffa_memory_region_get_receiver(memory_region, i); |
| 1911 | assert(receiver != NULL); |
| 1912 | ffa_id_t receiver_id = receiver->receiver_permissions.receiver; |
| 1913 | |
| 1914 | if (!vm_id_is_current_world(receiver_id)) { |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1915 | return true; |
| 1916 | } |
| 1917 | } |
| 1918 | return false; |
| 1919 | } |
| 1920 | |
| 1921 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 1922 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 1923 | * designated allocator of the memory handle. In practice, this also means |
| 1924 | * Hafnium is responsible for managing the state structures for the transaction. |
| 1925 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 1926 | * sender is an SP or there is at least one borrower that is an SP. |
| 1927 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 1928 | * operation involves only NWd VMs. |
| 1929 | * |
| 1930 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 1931 | * sender. Validation consists of checking if the message length and number of |
| 1932 | * memory region constituents match, and if the transition is valid for the |
| 1933 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1934 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1935 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1936 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1937 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1938 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1939 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1940 | * This function takes ownership of the `memory_region` passed in and will free |
| 1941 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1942 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1943 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1944 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1945 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1946 | uint32_t fragment_length, uint32_t share_func, |
| 1947 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1948 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1949 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1950 | struct share_states_locked share_states; |
| 1951 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1952 | |
| 1953 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1954 | * If there is an error validating the `memory_region` then we need to |
| 1955 | * free it because we own it but we won't be storing it in a share state |
| 1956 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1957 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1958 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1959 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1960 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1961 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1962 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1963 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1964 | } |
| 1965 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1966 | /* Set flag for share function, ready to be retrieved later. */ |
| 1967 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1968 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1969 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1970 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1971 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1972 | case FFA_MEM_LEND_32: |
| 1973 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1974 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1975 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1976 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1977 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1978 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1979 | } |
| 1980 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1981 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1982 | /* |
| 1983 | * Allocate a share state before updating the page table. Otherwise if |
| 1984 | * updating the page table succeeded but allocating the share state |
| 1985 | * failed then it would leave the memory in a state where nobody could |
| 1986 | * get it back. |
| 1987 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 1988 | share_state = allocate_share_state(share_states, share_func, |
| 1989 | memory_region, fragment_length, |
| 1990 | FFA_MEMORY_HANDLE_INVALID); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 1991 | if (share_state == NULL) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1992 | dlog_verbose("Failed to allocate share state.\n"); |
| 1993 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1994 | ret = ffa_error(FFA_NO_MEMORY); |
| 1995 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1996 | } |
| 1997 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1998 | if (fragment_length == memory_share_length) { |
| 1999 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2000 | ret = ffa_memory_send_complete( |
| 2001 | from_locked, share_states, share_state, page_pool, |
| 2002 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2003 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2004 | /* |
| 2005 | * Use sender ID from 'memory_region' assuming |
| 2006 | * that at this point it has been validated: |
| 2007 | * - MBZ at virtual FF-A instance. |
| 2008 | */ |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2009 | ffa_id_t sender_to_ret = |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2010 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 2011 | ? memory_region->sender |
| 2012 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2013 | ret = (struct ffa_value){ |
| 2014 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 2015 | .arg1 = (uint32_t)memory_region->handle, |
| 2016 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 2017 | .arg3 = fragment_length, |
| 2018 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2019 | } |
| 2020 | |
| 2021 | out: |
| 2022 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2023 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2024 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2025 | } |
| 2026 | |
| 2027 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2028 | * Continues an operation to donate, lend or share memory to a VM from current |
| 2029 | * world. If this is the last fragment then checks that the transition is valid |
| 2030 | * for the type of memory sending operation and updates the stage-2 page tables |
| 2031 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2032 | * |
| 2033 | * Assumes that the caller has already found and locked the sender VM and copied |
| 2034 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 2035 | * allocated page from Hafnium's internal pool. |
| 2036 | * |
| 2037 | * This function takes ownership of the `fragment` passed in; it must not be |
| 2038 | * freed by the caller. |
| 2039 | */ |
| 2040 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 2041 | void *fragment, |
| 2042 | uint32_t fragment_length, |
| 2043 | ffa_memory_handle_t handle, |
| 2044 | struct mpool *page_pool) |
| 2045 | { |
| 2046 | struct share_states_locked share_states = share_states_lock(); |
| 2047 | struct ffa_memory_share_state *share_state; |
| 2048 | struct ffa_value ret; |
| 2049 | struct ffa_memory_region *memory_region; |
| 2050 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 2051 | CHECK(is_aligned(fragment, |
| 2052 | alignof(struct ffa_memory_region_constituent))); |
| 2053 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 2054 | 0) { |
| 2055 | dlog_verbose("Fragment length %u misaligned.\n", |
| 2056 | fragment_length); |
| 2057 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2058 | goto out_free_fragment; |
| 2059 | } |
| 2060 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2061 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 2062 | &share_state, |
| 2063 | from_locked.vm->id, page_pool); |
| 2064 | if (ret.func != FFA_SUCCESS_32) { |
| 2065 | goto out_free_fragment; |
| 2066 | } |
| 2067 | memory_region = share_state->memory_region; |
| 2068 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 2069 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2070 | dlog_error( |
| 2071 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 2072 | "other world. This should never happen, and indicates " |
| 2073 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2074 | "EL3 code.\n"); |
| 2075 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2076 | goto out_free_fragment; |
| 2077 | } |
| 2078 | |
| 2079 | /* Add this fragment. */ |
| 2080 | share_state->fragments[share_state->fragment_count] = fragment; |
| 2081 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 2082 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 2083 | share_state->fragment_count++; |
| 2084 | |
| 2085 | /* Check whether the memory send operation is now ready to complete. */ |
| 2086 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2087 | ret = ffa_memory_send_complete( |
| 2088 | from_locked, share_states, share_state, page_pool, |
| 2089 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2090 | } else { |
| 2091 | ret = (struct ffa_value){ |
| 2092 | .func = FFA_MEM_FRAG_RX_32, |
| 2093 | .arg1 = (uint32_t)handle, |
| 2094 | .arg2 = (uint32_t)(handle >> 32), |
| 2095 | .arg3 = share_state_next_fragment_offset(share_states, |
| 2096 | share_state)}; |
| 2097 | } |
| 2098 | goto out; |
| 2099 | |
| 2100 | out_free_fragment: |
| 2101 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2102 | |
| 2103 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2104 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2105 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2106 | } |
| 2107 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2108 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 2109 | static void ffa_memory_retrieve_complete( |
| 2110 | struct share_states_locked share_states, |
| 2111 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 2112 | { |
| 2113 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 2114 | /* |
| 2115 | * Memory that has been donated can't be relinquished, |
| 2116 | * so no need to keep the share state around. |
| 2117 | */ |
| 2118 | share_state_free(share_states, share_state, page_pool); |
| 2119 | dlog_verbose("Freed share state for donate.\n"); |
| 2120 | } |
| 2121 | } |
| 2122 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2123 | /** |
| 2124 | * Initialises the given memory region descriptor to be used for an |
| 2125 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 2126 | * fragment. |
| 2127 | * The memory region descriptor is initialized according to retriever's |
| 2128 | * FF-A version. |
| 2129 | * |
| 2130 | * Returns true on success, or false if the given constituents won't all fit in |
| 2131 | * the first fragment. |
| 2132 | */ |
| 2133 | static bool ffa_retrieved_memory_region_init( |
| 2134 | void *response, uint32_t ffa_version, size_t response_max_size, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2135 | ffa_id_t sender, ffa_memory_attributes_t attributes, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2136 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2137 | ffa_memory_access_permissions_t permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2138 | struct ffa_memory_access *receivers, size_t receiver_count, |
| 2139 | uint32_t memory_access_desc_size, uint32_t page_count, |
| 2140 | uint32_t total_constituent_count, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2141 | const struct ffa_memory_region_constituent constituents[], |
| 2142 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 2143 | uint32_t *fragment_length) |
| 2144 | { |
| 2145 | struct ffa_composite_memory_region *composite_memory_region; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2146 | uint32_t i; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2147 | uint32_t composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2148 | uint32_t constituents_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2149 | |
| 2150 | assert(response != NULL); |
| 2151 | |
| 2152 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 2153 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 2154 | (struct ffa_memory_region_v1_0 *)response; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2155 | struct ffa_memory_access_v1_0 *receiver; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2156 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2157 | ffa_memory_region_init_header_v1_0(retrieve_response, sender, |
| 2158 | attributes, flags, handle, 0, |
| 2159 | receiver_count); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2160 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2161 | receiver = (struct ffa_memory_access_v1_0 *) |
| 2162 | retrieve_response->receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2163 | receiver_count = retrieve_response->receiver_count; |
| 2164 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2165 | for (uint32_t i = 0; i < receiver_count; i++) { |
| 2166 | ffa_id_t receiver_id = |
| 2167 | receivers[i].receiver_permissions.receiver; |
| 2168 | ffa_memory_receiver_flags_t recv_flags = |
| 2169 | receivers[i].receiver_permissions.flags; |
| 2170 | |
| 2171 | /* |
| 2172 | * Initialized here as in memory retrieve responses we |
| 2173 | * currently expect one borrower to be specified. |
| 2174 | */ |
| 2175 | ffa_memory_access_init_v1_0( |
| 2176 | receiver, receiver_id, |
| 2177 | ffa_get_data_access_attr(permissions), |
| 2178 | ffa_get_instruction_access_attr(permissions), |
| 2179 | recv_flags); |
| 2180 | } |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2181 | |
| 2182 | composite_offset = |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2183 | sizeof(struct ffa_memory_region_v1_0) + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2184 | receiver_count * sizeof(struct ffa_memory_access_v1_0); |
| 2185 | receiver->composite_memory_region_offset = composite_offset; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2186 | |
| 2187 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 2188 | retrieve_response, 0); |
| 2189 | } else { |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2190 | struct ffa_memory_region *retrieve_response = |
| 2191 | (struct ffa_memory_region *)response; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2192 | struct ffa_memory_access *retrieve_response_receivers; |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2193 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2194 | ffa_memory_region_init_header( |
| 2195 | retrieve_response, sender, attributes, flags, handle, 0, |
| 2196 | receiver_count, memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2197 | |
| 2198 | /* |
| 2199 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 2200 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 2201 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 2202 | * guaranteed that the offset we calculate here is aligned to a |
| 2203 | * 64-bit boundary and so 64-bit values can be copied without |
| 2204 | * alignment faults. |
| 2205 | */ |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2206 | composite_offset = |
Daniel Boulby | 41ef8ba | 2023-10-13 17:01:22 +0100 | [diff] [blame] | 2207 | retrieve_response->receivers_offset + |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2208 | (uint32_t)(receiver_count * |
| 2209 | retrieve_response->memory_access_desc_size); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2210 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2211 | retrieve_response_receivers = |
| 2212 | ffa_memory_region_get_receiver(retrieve_response, 0); |
| 2213 | assert(retrieve_response_receivers != NULL); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2214 | |
| 2215 | /* |
| 2216 | * Initialized here as in memory retrieve responses we currently |
| 2217 | * expect one borrower to be specified. |
| 2218 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2219 | memcpy_s(retrieve_response_receivers, |
| 2220 | sizeof(struct ffa_memory_access) * receiver_count, |
| 2221 | receivers, |
| 2222 | sizeof(struct ffa_memory_access) * receiver_count); |
| 2223 | |
| 2224 | retrieve_response_receivers->composite_memory_region_offset = |
| 2225 | composite_offset; |
| 2226 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2227 | composite_memory_region = |
| 2228 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 2229 | } |
| 2230 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2231 | assert(composite_memory_region != NULL); |
| 2232 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2233 | composite_memory_region->page_count = page_count; |
| 2234 | composite_memory_region->constituent_count = total_constituent_count; |
| 2235 | composite_memory_region->reserved_0 = 0; |
| 2236 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2237 | constituents_offset = |
| 2238 | composite_offset + sizeof(struct ffa_composite_memory_region); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2239 | if (constituents_offset + |
| 2240 | fragment_constituent_count * |
| 2241 | sizeof(struct ffa_memory_region_constituent) > |
| 2242 | response_max_size) { |
| 2243 | return false; |
| 2244 | } |
| 2245 | |
| 2246 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 2247 | composite_memory_region->constituents[i] = constituents[i]; |
| 2248 | } |
| 2249 | |
| 2250 | if (total_length != NULL) { |
| 2251 | *total_length = |
| 2252 | constituents_offset + |
| 2253 | composite_memory_region->constituent_count * |
| 2254 | sizeof(struct ffa_memory_region_constituent); |
| 2255 | } |
| 2256 | if (fragment_length != NULL) { |
| 2257 | *fragment_length = |
| 2258 | constituents_offset + |
| 2259 | fragment_constituent_count * |
| 2260 | sizeof(struct ffa_memory_region_constituent); |
| 2261 | } |
| 2262 | |
| 2263 | return true; |
| 2264 | } |
| 2265 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2266 | /** |
| 2267 | * Validates the retrieved permissions against those specified by the lender |
| 2268 | * of memory share operation. Optionally can help set the permissions to be used |
| 2269 | * for the S2 mapping, through the `permissions` argument. |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2270 | * Returns FFA_SUCCESS if all the fields are valid. FFA_ERROR, with error code: |
| 2271 | * - FFA_INVALID_PARAMETERS -> if the fields have invalid values as per the |
| 2272 | * specification for each ABI. |
| 2273 | * - FFA_DENIED -> if the permissions specified by the retriever are not |
| 2274 | * less permissive than those provided by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2275 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2276 | static struct ffa_value ffa_memory_retrieve_is_memory_access_valid( |
| 2277 | uint32_t share_func, enum ffa_data_access sent_data_access, |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2278 | enum ffa_data_access requested_data_access, |
| 2279 | enum ffa_instruction_access sent_instruction_access, |
| 2280 | enum ffa_instruction_access requested_instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2281 | ffa_memory_access_permissions_t *permissions, bool multiple_borrowers) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2282 | { |
| 2283 | switch (sent_data_access) { |
| 2284 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2285 | case FFA_DATA_ACCESS_RW: |
| 2286 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2287 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2288 | if (permissions != NULL) { |
| 2289 | ffa_set_data_access_attr(permissions, |
| 2290 | FFA_DATA_ACCESS_RW); |
| 2291 | } |
| 2292 | break; |
| 2293 | } |
| 2294 | /* Intentional fall-through. */ |
| 2295 | case FFA_DATA_ACCESS_RO: |
| 2296 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2297 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2298 | if (permissions != NULL) { |
| 2299 | ffa_set_data_access_attr(permissions, |
| 2300 | FFA_DATA_ACCESS_RO); |
| 2301 | } |
| 2302 | break; |
| 2303 | } |
| 2304 | dlog_verbose( |
| 2305 | "Invalid data access requested; sender specified " |
| 2306 | "permissions %#x but receiver requested %#x.\n", |
| 2307 | sent_data_access, requested_data_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2308 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2309 | case FFA_DATA_ACCESS_RESERVED: |
| 2310 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 2311 | "checked before this point."); |
| 2312 | } |
| 2313 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2314 | /* |
| 2315 | * For operations with a single borrower, If it is an FFA_MEMORY_LEND |
| 2316 | * or FFA_MEMORY_DONATE the retriever should have specifed the |
| 2317 | * instruction permissions it wishes to receive. |
| 2318 | */ |
| 2319 | switch (share_func) { |
| 2320 | case FFA_MEM_SHARE_32: |
| 2321 | if (requested_instruction_access != |
| 2322 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2323 | dlog_verbose( |
| 2324 | "%s: for share instruction permissions must " |
| 2325 | "NOT be specified.\n", |
| 2326 | __func__); |
| 2327 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2328 | } |
| 2329 | break; |
| 2330 | case FFA_MEM_LEND_32: |
| 2331 | /* |
| 2332 | * For operations with multiple borrowers only permit XN |
| 2333 | * permissions, and both Sender and borrower should have used |
| 2334 | * FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED. |
| 2335 | */ |
| 2336 | if (multiple_borrowers) { |
| 2337 | if (requested_instruction_access != |
| 2338 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2339 | dlog_verbose( |
| 2340 | "%s: lend/share/donate with multiple " |
| 2341 | "borrowers " |
| 2342 | "instruction permissions must NOT be " |
| 2343 | "specified.\n", |
| 2344 | __func__); |
| 2345 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2346 | } |
| 2347 | break; |
| 2348 | } |
| 2349 | /* Fall through if the operation targets a single borrower. */ |
| 2350 | case FFA_MEM_DONATE_32: |
| 2351 | if (!multiple_borrowers && |
| 2352 | requested_instruction_access == |
| 2353 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2354 | dlog_verbose( |
| 2355 | "%s: for lend/donate with single borrower " |
| 2356 | "instruction permissions must be speficified " |
| 2357 | "by borrower\n", |
| 2358 | __func__); |
| 2359 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2360 | } |
| 2361 | break; |
| 2362 | default: |
| 2363 | panic("%s: Wrong func id provided.\n", __func__); |
| 2364 | } |
| 2365 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2366 | switch (sent_instruction_access) { |
| 2367 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2368 | case FFA_INSTRUCTION_ACCESS_X: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2369 | if (requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2370 | if (permissions != NULL) { |
| 2371 | ffa_set_instruction_access_attr( |
| 2372 | permissions, FFA_INSTRUCTION_ACCESS_X); |
| 2373 | } |
| 2374 | break; |
| 2375 | } |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2376 | /* |
| 2377 | * Fall through if requested permissions are less |
| 2378 | * permissive than those provided by the sender. |
| 2379 | */ |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2380 | case FFA_INSTRUCTION_ACCESS_NX: |
| 2381 | if (requested_instruction_access == |
| 2382 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2383 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2384 | if (permissions != NULL) { |
| 2385 | ffa_set_instruction_access_attr( |
| 2386 | permissions, FFA_INSTRUCTION_ACCESS_NX); |
| 2387 | } |
| 2388 | break; |
| 2389 | } |
| 2390 | dlog_verbose( |
| 2391 | "Invalid instruction access requested; sender " |
| 2392 | "specified permissions %#x but receiver requested " |
| 2393 | "%#x.\n", |
| 2394 | sent_instruction_access, requested_instruction_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2395 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2396 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2397 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 2398 | "be checked before this point."); |
| 2399 | } |
| 2400 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2401 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2402 | } |
| 2403 | |
| 2404 | /** |
| 2405 | * Validate the receivers' permissions in the retrieve request against those |
| 2406 | * specified by the lender. |
| 2407 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 2408 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2409 | * The function looks into the flag to bypass multiple borrower checks: |
| 2410 | * - If not set returns FFA_SUCCESS if all specified permissions are valid. |
| 2411 | * - If set returns FFA_SUCCESS if the descriptor contains the permissions |
| 2412 | * to the caller of FFA_MEM_RETRIEVE_REQ and they are valid. Other permissions |
| 2413 | * are ignored, if provided. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2414 | */ |
| 2415 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 2416 | struct ffa_memory_region *memory_region, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2417 | struct ffa_memory_region *retrieve_request, ffa_id_t to_vm_id, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2418 | ffa_memory_access_permissions_t *permissions, |
| 2419 | struct ffa_memory_access **receiver_ret, uint32_t func_id) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2420 | { |
| 2421 | uint32_t retrieve_receiver_index; |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2422 | bool bypass_multi_receiver_check = |
| 2423 | (retrieve_request->flags & |
| 2424 | FFA_MEMORY_REGION_FLAG_BYPASS_BORROWERS_CHECK) != 0U; |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2425 | const uint32_t region_receiver_count = memory_region->receiver_count; |
| 2426 | struct ffa_value ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2427 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2428 | assert(receiver_ret != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2429 | assert(permissions != NULL); |
| 2430 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2431 | *permissions = 0; |
| 2432 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2433 | if (!bypass_multi_receiver_check) { |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2434 | if (retrieve_request->receiver_count != region_receiver_count) { |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2435 | dlog_verbose( |
| 2436 | "Retrieve request should contain same list of " |
| 2437 | "borrowers, as specified by the lender.\n"); |
| 2438 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2439 | } |
| 2440 | } else { |
| 2441 | if (retrieve_request->receiver_count != 1) { |
| 2442 | dlog_verbose( |
| 2443 | "Set bypass multiple borrower check, receiver " |
| 2444 | "list must be sized 1 (%x)\n", |
| 2445 | memory_region->receiver_count); |
| 2446 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2447 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2448 | } |
| 2449 | |
| 2450 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2451 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2452 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2453 | ffa_memory_access_permissions_t sent_permissions; |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2454 | struct ffa_memory_access *retrieve_request_receiver = |
| 2455 | ffa_memory_region_get_receiver(retrieve_request, i); |
| 2456 | assert(retrieve_request_receiver != NULL); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2457 | ffa_memory_access_permissions_t requested_permissions = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2458 | retrieve_request_receiver->receiver_permissions |
| 2459 | .permissions; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2460 | ffa_id_t current_receiver_id = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2461 | retrieve_request_receiver->receiver_permissions |
| 2462 | .receiver; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2463 | struct ffa_memory_access *receiver; |
| 2464 | uint32_t mem_region_receiver_index; |
| 2465 | bool permissions_RO; |
| 2466 | bool clear_memory_flags; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2467 | bool found_to_id = current_receiver_id == to_vm_id; |
| 2468 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2469 | if (bypass_multi_receiver_check && !found_to_id) { |
| 2470 | dlog_verbose( |
| 2471 | "Bypass multiple borrower check for id %x.\n", |
| 2472 | current_receiver_id); |
| 2473 | continue; |
| 2474 | } |
| 2475 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2476 | if (retrieve_request_receiver->composite_memory_region_offset != |
| 2477 | 0U) { |
| 2478 | dlog_verbose( |
| 2479 | "Retriever specified address ranges not " |
| 2480 | "supported (got offset %d).\n", |
| 2481 | retrieve_request_receiver |
| 2482 | ->composite_memory_region_offset); |
| 2483 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2484 | } |
| 2485 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2486 | /* |
| 2487 | * Find the current receiver in the transaction descriptor from |
| 2488 | * sender. |
| 2489 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2490 | mem_region_receiver_index = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2491 | ffa_memory_region_get_receiver_index( |
| 2492 | memory_region, current_receiver_id); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2493 | |
| 2494 | if (mem_region_receiver_index == |
| 2495 | memory_region->receiver_count) { |
| 2496 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2497 | current_receiver_id); |
| 2498 | return ffa_error(FFA_DENIED); |
| 2499 | } |
| 2500 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2501 | receiver = ffa_memory_region_get_receiver( |
| 2502 | memory_region, mem_region_receiver_index); |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 2503 | assert(receiver != NULL); |
| 2504 | |
| 2505 | sent_permissions = receiver->receiver_permissions.permissions; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2506 | |
| 2507 | if (found_to_id) { |
| 2508 | retrieve_receiver_index = i; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2509 | |
| 2510 | *receiver_ret = receiver; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2511 | } |
| 2512 | |
| 2513 | /* |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2514 | * Check if retrieve request memory access list is valid: |
| 2515 | * - The retrieve request complies with the specification. |
| 2516 | * - Permissions are within those specified by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2517 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2518 | ret = ffa_memory_retrieve_is_memory_access_valid( |
| 2519 | func_id, ffa_get_data_access_attr(sent_permissions), |
| 2520 | ffa_get_data_access_attr(requested_permissions), |
| 2521 | ffa_get_instruction_access_attr(sent_permissions), |
| 2522 | ffa_get_instruction_access_attr(requested_permissions), |
| 2523 | found_to_id ? permissions : NULL, |
| 2524 | region_receiver_count > 1); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2525 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2526 | if (ret.func != FFA_SUCCESS_32) { |
| 2527 | return ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2528 | } |
| 2529 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2530 | permissions_RO = (ffa_get_data_access_attr(*permissions) == |
| 2531 | FFA_DATA_ACCESS_RO); |
| 2532 | clear_memory_flags = (retrieve_request->flags & |
| 2533 | FFA_MEMORY_REGION_FLAG_CLEAR) != 0U; |
| 2534 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2535 | /* |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2536 | * Can't request PM to clear memory if only provided |
| 2537 | * with RO permissions. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2538 | */ |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2539 | if (found_to_id && permissions_RO && clear_memory_flags) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2540 | dlog_verbose( |
| 2541 | "Receiver has RO permissions can not request " |
| 2542 | "clear.\n"); |
| 2543 | return ffa_error(FFA_DENIED); |
| 2544 | } |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2545 | |
| 2546 | /* |
| 2547 | * Check the impdef in the retrieve_request matches the value in |
| 2548 | * the original memory send. |
| 2549 | */ |
| 2550 | if (ffa_version_from_memory_access_desc_size( |
| 2551 | memory_region->memory_access_desc_size) >= |
| 2552 | MAKE_FFA_VERSION(1, 2) && |
| 2553 | ffa_version_from_memory_access_desc_size( |
| 2554 | retrieve_request->memory_access_desc_size) >= |
| 2555 | MAKE_FFA_VERSION(1, 2)) { |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2556 | if (receiver->impdef.val[0] != |
| 2557 | retrieve_request_receiver->impdef.val[0] || |
| 2558 | receiver->impdef.val[1] != |
| 2559 | retrieve_request_receiver->impdef.val[1]) { |
| 2560 | dlog_verbose( |
| 2561 | "Impdef value in memory send does not " |
| 2562 | "match retrieve request value " |
| 2563 | "send value %#x %#x retrieve request " |
| 2564 | "value %#x %#x\n", |
| 2565 | receiver->impdef.val[0], |
| 2566 | receiver->impdef.val[1], |
| 2567 | retrieve_request_receiver->impdef |
| 2568 | .val[0], |
| 2569 | retrieve_request_receiver->impdef |
| 2570 | .val[1]); |
| 2571 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2572 | } |
| 2573 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2574 | } |
| 2575 | |
| 2576 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2577 | dlog_verbose( |
| 2578 | "Retrieve request does not contain caller's (%x) " |
| 2579 | "permissions\n", |
| 2580 | to_vm_id); |
| 2581 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2582 | } |
| 2583 | |
| 2584 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2585 | } |
| 2586 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2587 | /* |
| 2588 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 2589 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 2590 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 2591 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 2592 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 2593 | * exception of the sender ID and handle. |
| 2594 | */ |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2595 | bool is_ffa_hypervisor_retrieve_request(struct ffa_memory_region *request, |
| 2596 | struct vm_locked to_locked) |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2597 | { |
| 2598 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
| 2599 | request->attributes == 0U && request->flags == 0U && |
| 2600 | request->tag == 0U && request->receiver_count == 0U && |
| 2601 | plat_ffa_memory_handle_allocated_by_current_world( |
| 2602 | request->handle); |
| 2603 | } |
| 2604 | |
| 2605 | /* |
| 2606 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 2607 | */ |
| 2608 | static void ffa_memory_retrieve_complete_from_hyp( |
| 2609 | struct ffa_memory_share_state *share_state) |
| 2610 | { |
| 2611 | if (share_state->hypervisor_fragment_count == |
| 2612 | share_state->fragment_count) { |
| 2613 | share_state->hypervisor_fragment_count = 0; |
| 2614 | } |
| 2615 | } |
| 2616 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2617 | /** |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2618 | * Prepares the return of the ffa_value for the memory retrieve response. |
| 2619 | */ |
| 2620 | static struct ffa_value ffa_memory_retrieve_resp(uint32_t total_length, |
| 2621 | uint32_t fragment_length) |
| 2622 | { |
| 2623 | return (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
| 2624 | .arg1 = total_length, |
| 2625 | .arg2 = fragment_length}; |
| 2626 | } |
| 2627 | |
| 2628 | /** |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2629 | * Validate that the memory region descriptor provided by the borrower on |
| 2630 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 2631 | * memory sharing call. |
| 2632 | */ |
| 2633 | static struct ffa_value ffa_memory_retrieve_validate( |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2634 | ffa_id_t to_id, struct ffa_memory_region *retrieve_request, |
| 2635 | uint32_t retrieve_request_length, |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2636 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 2637 | uint32_t share_func) |
| 2638 | { |
| 2639 | ffa_memory_region_flags_t transaction_type = |
| 2640 | retrieve_request->flags & |
| 2641 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2642 | enum ffa_memory_security security_state; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2643 | const uint64_t memory_access_desc_size = |
| 2644 | retrieve_request->memory_access_desc_size; |
| 2645 | const uint32_t expected_retrieve_request_length = |
| 2646 | retrieve_request->receivers_offset + |
| 2647 | (uint32_t)(retrieve_request->receiver_count * |
| 2648 | memory_access_desc_size); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2649 | |
| 2650 | assert(retrieve_request != NULL); |
| 2651 | assert(memory_region != NULL); |
| 2652 | assert(receiver_index != NULL); |
| 2653 | assert(retrieve_request->sender == memory_region->sender); |
| 2654 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2655 | if (retrieve_request_length != expected_retrieve_request_length) { |
| 2656 | dlog_verbose( |
| 2657 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
| 2658 | "but was %d.\n", |
| 2659 | expected_retrieve_request_length, |
| 2660 | retrieve_request_length); |
| 2661 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2662 | } |
| 2663 | |
| 2664 | if (retrieve_request->sender != memory_region->sender) { |
| 2665 | dlog_verbose( |
| 2666 | "Memory with handle %#x not fully sent, can't " |
| 2667 | "retrieve.\n", |
| 2668 | memory_region->handle); |
| 2669 | return ffa_error(FFA_DENIED); |
| 2670 | } |
| 2671 | |
| 2672 | /* |
| 2673 | * The SPMC can only process retrieve requests to memory share |
| 2674 | * operations with one borrower from the other world. It can't |
| 2675 | * determine the ID of the NWd VM that invoked the retrieve |
| 2676 | * request interface call. It relies on the hypervisor to |
| 2677 | * validate the caller's ID against that provided in the |
| 2678 | * `receivers` list of the retrieve response. |
| 2679 | * In case there is only one borrower from the NWd in the |
| 2680 | * transaction descriptor, record that in the `receiver_id` for |
| 2681 | * later use, and validate in the retrieve request message. |
| 2682 | * This limitation is due to the fact SPMC can't determine the |
| 2683 | * index in the memory share structures state to update. |
| 2684 | */ |
| 2685 | if (to_id == HF_HYPERVISOR_VM_ID) { |
| 2686 | uint32_t other_world_count = 0; |
| 2687 | |
| 2688 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2689 | struct ffa_memory_access *receiver = |
| 2690 | ffa_memory_region_get_receiver(retrieve_request, |
| 2691 | 0); |
| 2692 | assert(receiver != NULL); |
| 2693 | |
| 2694 | to_id = receiver->receiver_permissions.receiver; |
| 2695 | |
| 2696 | if (!vm_id_is_current_world(to_id)) { |
| 2697 | other_world_count++; |
| 2698 | } |
| 2699 | } |
| 2700 | |
| 2701 | if (other_world_count > 1) { |
| 2702 | dlog_verbose( |
| 2703 | "Support one receiver from the other " |
| 2704 | "world.\n"); |
| 2705 | return ffa_error(FFA_NOT_SUPPORTED); |
| 2706 | } |
| 2707 | } |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2708 | /* |
| 2709 | * Check that the transaction type expected by the receiver is |
| 2710 | * correct, if it has been specified. |
| 2711 | */ |
| 2712 | if (transaction_type != |
| 2713 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 2714 | transaction_type != (memory_region->flags & |
| 2715 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 2716 | dlog_verbose( |
| 2717 | "Incorrect transaction type %#x for " |
| 2718 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
| 2719 | transaction_type, |
| 2720 | memory_region->flags & |
| 2721 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 2722 | retrieve_request->handle); |
| 2723 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2724 | } |
| 2725 | |
| 2726 | if (retrieve_request->tag != memory_region->tag) { |
| 2727 | dlog_verbose( |
| 2728 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
| 2729 | "%d for handle %#x.\n", |
| 2730 | retrieve_request->tag, memory_region->tag, |
| 2731 | retrieve_request->handle); |
| 2732 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2733 | } |
| 2734 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2735 | *receiver_index = |
| 2736 | ffa_memory_region_get_receiver_index(memory_region, to_id); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2737 | |
| 2738 | if (*receiver_index == memory_region->receiver_count) { |
| 2739 | dlog_verbose( |
| 2740 | "Incorrect receiver VM ID %d for " |
| 2741 | "FFA_MEM_RETRIEVE_REQ, for handle %#x.\n", |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2742 | to_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2743 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2744 | } |
| 2745 | |
| 2746 | if ((retrieve_request->flags & |
| 2747 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 2748 | dlog_verbose( |
| 2749 | "Retriever specified 'address range alignment 'hint' " |
| 2750 | "not supported.\n"); |
| 2751 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2752 | } |
| 2753 | if ((retrieve_request->flags & |
| 2754 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 2755 | dlog_verbose( |
| 2756 | "Bits 8-5 must be zero in memory region's flags " |
| 2757 | "(address range alignment hint not supported).\n"); |
| 2758 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2759 | } |
| 2760 | |
| 2761 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 2762 | dlog_verbose( |
| 2763 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 2764 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2765 | } |
| 2766 | |
| 2767 | if (share_func == FFA_MEM_SHARE_32 && |
| 2768 | (retrieve_request->flags & |
| 2769 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2770 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 2771 | dlog_verbose( |
| 2772 | "Memory Share operation can't clean after relinquish " |
| 2773 | "memory region.\n"); |
| 2774 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2775 | } |
| 2776 | |
| 2777 | /* |
| 2778 | * If the borrower needs the memory to be cleared before mapping |
| 2779 | * to its address space, the sender should have set the flag |
| 2780 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 2781 | * FFA_DENIED. |
| 2782 | */ |
| 2783 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 2784 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 2785 | dlog_verbose( |
| 2786 | "Borrower needs memory cleared. Sender needs to set " |
| 2787 | "flag for clearing memory.\n"); |
| 2788 | return ffa_error(FFA_DENIED); |
| 2789 | } |
| 2790 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2791 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
| 2792 | security_state = |
| 2793 | ffa_get_memory_security_attr(retrieve_request->attributes); |
| 2794 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2795 | dlog_verbose( |
| 2796 | "Invalid security state for memory retrieve request " |
| 2797 | "operation.\n"); |
| 2798 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2799 | } |
| 2800 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2801 | /* |
| 2802 | * If memory type is not specified, bypass validation of memory |
| 2803 | * attributes in the retrieve request. The retriever is expecting to |
| 2804 | * obtain this information from the SPMC. |
| 2805 | */ |
| 2806 | if (ffa_get_memory_type_attr(retrieve_request->attributes) == |
| 2807 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 2808 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2809 | } |
| 2810 | |
| 2811 | /* |
| 2812 | * Ensure receiver's attributes are compatible with how |
| 2813 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 2814 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 2815 | */ |
| 2816 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 2817 | } |
| 2818 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2819 | static struct ffa_value ffa_partition_retrieve_request( |
| 2820 | struct share_states_locked share_states, |
| 2821 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 2822 | struct ffa_memory_region *retrieve_request, |
| 2823 | uint32_t retrieve_request_length, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2824 | { |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2825 | ffa_memory_access_permissions_t permissions = 0; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2826 | uint32_t memory_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2827 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2828 | struct ffa_composite_memory_region *composite; |
| 2829 | uint32_t total_length; |
| 2830 | uint32_t fragment_length; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2831 | ffa_id_t receiver_id = to_locked.vm->id; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2832 | bool is_retrieve_complete = false; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2833 | ffa_memory_attributes_t attributes; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2834 | const uint64_t memory_access_desc_size = |
Daniel Boulby | de974ca | 2023-12-12 13:53:31 +0000 | [diff] [blame] | 2835 | retrieve_request->memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2836 | uint32_t receiver_index; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2837 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2838 | ffa_memory_handle_t handle = retrieve_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2839 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2840 | struct ffa_memory_region *memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2841 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2842 | if (!share_state->sending_complete) { |
| 2843 | dlog_verbose( |
| 2844 | "Memory with handle %#x not fully sent, can't " |
| 2845 | "retrieve.\n", |
| 2846 | handle); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2847 | return ffa_error(FFA_INVALID_PARAMETERS); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2848 | } |
| 2849 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2850 | /* |
| 2851 | * Validate retrieve request, according to what was sent by the |
| 2852 | * sender. Function will output the `receiver_index` from the |
| 2853 | * provided memory region. |
| 2854 | */ |
| 2855 | ret = ffa_memory_retrieve_validate( |
| 2856 | receiver_id, retrieve_request, retrieve_request_length, |
| 2857 | memory_region, &receiver_index, share_state->share_func); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2858 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2859 | if (ret.func != FFA_SUCCESS_32) { |
| 2860 | return ret; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2861 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2862 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2863 | if (share_state->retrieved_fragment_count[receiver_index] != 0U) { |
| 2864 | dlog_verbose("Memory with handle %#x already retrieved.\n", |
| 2865 | handle); |
| 2866 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2867 | } |
| 2868 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2869 | /* |
| 2870 | * Validate the requested permissions against the sent |
| 2871 | * permissions. |
| 2872 | * Outputs the permissions to give to retriever at S2 |
| 2873 | * PTs. |
| 2874 | */ |
| 2875 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 2876 | memory_region, retrieve_request, receiver_id, &permissions, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2877 | &receiver, share_state->share_func); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2878 | if (ret.func != FFA_SUCCESS_32) { |
| 2879 | return ret; |
| 2880 | } |
| 2881 | |
| 2882 | memory_to_mode = ffa_memory_permissions_to_mode( |
| 2883 | permissions, share_state->sender_orig_mode); |
| 2884 | |
| 2885 | ret = ffa_retrieve_check_update( |
| 2886 | to_locked, share_state->fragments, |
| 2887 | share_state->fragment_constituent_counts, |
| 2888 | share_state->fragment_count, memory_to_mode, |
| 2889 | share_state->share_func, false, page_pool); |
| 2890 | |
| 2891 | if (ret.func != FFA_SUCCESS_32) { |
| 2892 | return ret; |
| 2893 | } |
| 2894 | |
| 2895 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 2896 | |
| 2897 | is_retrieve_complete = |
| 2898 | share_state->retrieved_fragment_count[receiver_index] == |
| 2899 | share_state->fragment_count; |
| 2900 | |
| 2901 | share_state->clear_after_relinquish = |
| 2902 | (retrieve_request->flags & |
| 2903 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH) != 0U; |
| 2904 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2905 | /* VMs acquire the RX buffer from SPMC. */ |
| 2906 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2907 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2908 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2909 | * Copy response to RX buffer of caller and deliver the message. |
| 2910 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2911 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2912 | composite = ffa_memory_region_get_composite(memory_region, 0); |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2913 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2914 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2915 | * Constituents which we received in the first fragment should |
| 2916 | * always fit in the first fragment we are sending, because the |
| 2917 | * header is the same size in both cases and we have a fixed |
| 2918 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 2919 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2920 | */ |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2921 | |
| 2922 | /* |
| 2923 | * Set the security state in the memory retrieve response attributes |
| 2924 | * if specified by the target mode. |
| 2925 | */ |
| 2926 | attributes = plat_ffa_memory_security_mode( |
| 2927 | memory_region->attributes, share_state->sender_orig_mode); |
| 2928 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2929 | /* Provide the permissions that had been provided. */ |
| 2930 | receiver->receiver_permissions.permissions = permissions; |
| 2931 | |
| 2932 | /* |
| 2933 | * Prepare the memory region descriptor for the retrieve response. |
| 2934 | * Provide the pointer to the receiver tracked in the share state |
| 2935 | * strucutures. |
| 2936 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2937 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2938 | to_locked.vm->mailbox.recv, to_locked.vm->ffa_version, |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2939 | HF_MAILBOX_SIZE, memory_region->sender, attributes, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2940 | memory_region->flags, handle, permissions, receiver, 1, |
| 2941 | memory_access_desc_size, composite->page_count, |
| 2942 | composite->constituent_count, share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2943 | share_state->fragment_constituent_counts[0], &total_length, |
| 2944 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2945 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2946 | if (is_retrieve_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2947 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2948 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2949 | } |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2950 | |
| 2951 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 2952 | } |
| 2953 | |
| 2954 | static struct ffa_value ffa_hypervisor_retrieve_request( |
| 2955 | struct ffa_memory_share_state *share_state, struct vm_locked to_locked, |
| 2956 | struct ffa_memory_region *retrieve_request) |
| 2957 | { |
| 2958 | struct ffa_value ret; |
| 2959 | struct ffa_composite_memory_region *composite; |
| 2960 | uint32_t total_length; |
| 2961 | uint32_t fragment_length; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2962 | ffa_memory_attributes_t attributes; |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 2963 | uint64_t memory_access_desc_size; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2964 | struct ffa_memory_region *memory_region; |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2965 | struct ffa_memory_access *receiver; |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2966 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 2967 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2968 | memory_region = share_state->memory_region; |
| 2969 | |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 2970 | assert(to_locked.vm->id == HF_HYPERVISOR_VM_ID); |
| 2971 | |
J-Alves | 7b6ab61 | 2024-01-24 09:54:54 +0000 | [diff] [blame] | 2972 | switch (to_locked.vm->ffa_version) { |
| 2973 | case MAKE_FFA_VERSION(1, 2): |
| 2974 | memory_access_desc_size = sizeof(struct ffa_memory_access); |
| 2975 | break; |
| 2976 | case MAKE_FFA_VERSION(1, 0): |
| 2977 | case MAKE_FFA_VERSION(1, 1): |
| 2978 | memory_access_desc_size = sizeof(struct ffa_memory_access_v1_0); |
| 2979 | break; |
| 2980 | default: |
| 2981 | panic("version not supported: %x\n", to_locked.vm->ffa_version); |
| 2982 | } |
| 2983 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 2984 | if (share_state->hypervisor_fragment_count != 0U) { |
| 2985 | dlog_verbose( |
| 2986 | "Memory with handle %#x already retrieved by " |
| 2987 | "the hypervisor.\n", |
| 2988 | handle); |
| 2989 | return ffa_error(FFA_DENIED); |
| 2990 | } |
| 2991 | |
| 2992 | share_state->hypervisor_fragment_count = 1; |
| 2993 | |
| 2994 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 2995 | |
| 2996 | /* VMs acquire the RX buffer from SPMC. */ |
| 2997 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2998 | |
| 2999 | /* |
| 3000 | * Copy response to RX buffer of caller and deliver the message. |
| 3001 | * This must be done before the share_state is (possibly) freed. |
| 3002 | */ |
| 3003 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 3004 | |
| 3005 | /* |
| 3006 | * Constituents which we received in the first fragment should |
| 3007 | * always fit in the first fragment we are sending, because the |
| 3008 | * header is the same size in both cases and we have a fixed |
| 3009 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 3010 | * should never fail. |
| 3011 | */ |
| 3012 | |
| 3013 | /* |
| 3014 | * Set the security state in the memory retrieve response attributes |
| 3015 | * if specified by the target mode. |
| 3016 | */ |
| 3017 | attributes = plat_ffa_memory_security_mode( |
| 3018 | memory_region->attributes, share_state->sender_orig_mode); |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 3019 | |
| 3020 | receiver = ffa_memory_region_get_receiver(memory_region, 0); |
| 3021 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3022 | CHECK(ffa_retrieved_memory_region_init( |
| 3023 | to_locked.vm->mailbox.recv, to_locked.vm->ffa_version, |
| 3024 | HF_MAILBOX_SIZE, memory_region->sender, attributes, |
Daniel Boulby | 44e9b3b | 2024-01-17 12:21:44 +0000 | [diff] [blame^] | 3025 | memory_region->flags, handle, |
| 3026 | receiver->receiver_permissions.permissions, receiver, |
| 3027 | memory_region->receiver_count, memory_access_desc_size, |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3028 | composite->page_count, composite->constituent_count, |
| 3029 | share_state->fragments[0], |
| 3030 | share_state->fragment_constituent_counts[0], &total_length, |
| 3031 | &fragment_length)); |
| 3032 | |
| 3033 | return ffa_memory_retrieve_resp(total_length, fragment_length); |
| 3034 | } |
| 3035 | |
| 3036 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 3037 | struct ffa_memory_region *retrieve_request, |
| 3038 | uint32_t retrieve_request_length, |
| 3039 | struct mpool *page_pool) |
| 3040 | { |
| 3041 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 3042 | struct share_states_locked share_states; |
| 3043 | struct ffa_memory_share_state *share_state; |
| 3044 | struct ffa_value ret; |
| 3045 | |
| 3046 | dump_share_states(); |
| 3047 | |
| 3048 | share_states = share_states_lock(); |
| 3049 | share_state = get_share_state(share_states, handle); |
| 3050 | if (share_state == NULL) { |
| 3051 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
| 3052 | handle); |
| 3053 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3054 | goto out; |
| 3055 | } |
| 3056 | |
| 3057 | if (is_ffa_hypervisor_retrieve_request(retrieve_request, to_locked)) { |
| 3058 | ret = ffa_hypervisor_retrieve_request(share_state, to_locked, |
| 3059 | retrieve_request); |
| 3060 | } else { |
| 3061 | ret = ffa_partition_retrieve_request( |
| 3062 | share_states, share_state, to_locked, retrieve_request, |
| 3063 | retrieve_request_length, page_pool); |
| 3064 | } |
| 3065 | |
| 3066 | /* Track use of the RX buffer if the handling has succeeded. */ |
| 3067 | if (ret.func == FFA_MEM_RETRIEVE_RESP_32) { |
| 3068 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
| 3069 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
| 3070 | } |
| 3071 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3072 | out: |
| 3073 | share_states_unlock(&share_states); |
| 3074 | dump_share_states(); |
| 3075 | return ret; |
| 3076 | } |
| 3077 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3078 | /** |
| 3079 | * Determine expected fragment offset according to the FF-A version of |
| 3080 | * the caller. |
| 3081 | */ |
| 3082 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3083 | struct ffa_memory_region *memory_region, |
| 3084 | uint32_t retrieved_constituents_count, uint32_t ffa_version) |
| 3085 | { |
| 3086 | uint32_t expected_fragment_offset; |
| 3087 | uint32_t composite_constituents_offset; |
| 3088 | |
Kathleen Capella | e4fe296 | 2023-09-01 17:08:47 -0400 | [diff] [blame] | 3089 | if (ffa_version >= MAKE_FFA_VERSION(1, 1)) { |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3090 | /* |
| 3091 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 3092 | * can retrieve the constituents offset from descriptor. |
| 3093 | */ |
| 3094 | composite_constituents_offset = |
| 3095 | ffa_composite_constituent_offset(memory_region, 0); |
| 3096 | } else if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 3097 | /* |
| 3098 | * If retriever is FF-A v1.0, determine the composite offset |
| 3099 | * as it is expected to have been configured in the |
| 3100 | * retrieve response. |
| 3101 | */ |
| 3102 | composite_constituents_offset = |
| 3103 | sizeof(struct ffa_memory_region_v1_0) + |
| 3104 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3105 | sizeof(struct ffa_memory_access_v1_0) + |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3106 | sizeof(struct ffa_composite_memory_region); |
| 3107 | } else { |
| 3108 | panic("%s received an invalid FF-A version.\n", __func__); |
| 3109 | } |
| 3110 | |
| 3111 | expected_fragment_offset = |
| 3112 | composite_constituents_offset + |
| 3113 | retrieved_constituents_count * |
| 3114 | sizeof(struct ffa_memory_region_constituent) - |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3115 | (uint32_t)(memory_region->memory_access_desc_size * |
| 3116 | (memory_region->receiver_count - 1)); |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3117 | |
| 3118 | return expected_fragment_offset; |
| 3119 | } |
| 3120 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3121 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 3122 | ffa_memory_handle_t handle, |
| 3123 | uint32_t fragment_offset, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 3124 | ffa_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3125 | struct mpool *page_pool) |
| 3126 | { |
| 3127 | struct ffa_memory_region *memory_region; |
| 3128 | struct share_states_locked share_states; |
| 3129 | struct ffa_memory_share_state *share_state; |
| 3130 | struct ffa_value ret; |
| 3131 | uint32_t fragment_index; |
| 3132 | uint32_t retrieved_constituents_count; |
| 3133 | uint32_t i; |
| 3134 | uint32_t expected_fragment_offset; |
| 3135 | uint32_t remaining_constituent_count; |
| 3136 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3137 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3138 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3139 | |
| 3140 | dump_share_states(); |
| 3141 | |
| 3142 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3143 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3144 | if (share_state == NULL) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3145 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 3146 | handle); |
| 3147 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3148 | goto out; |
| 3149 | } |
| 3150 | |
| 3151 | memory_region = share_state->memory_region; |
| 3152 | CHECK(memory_region != NULL); |
| 3153 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3154 | if (!share_state->sending_complete) { |
| 3155 | dlog_verbose( |
| 3156 | "Memory with handle %#x not fully sent, can't " |
| 3157 | "retrieve.\n", |
| 3158 | handle); |
| 3159 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3160 | goto out; |
| 3161 | } |
| 3162 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3163 | /* |
| 3164 | * If retrieve request from the hypervisor has been initiated in the |
| 3165 | * given share_state, continue it, else assume it is a continuation of |
| 3166 | * retrieve request from a NWd VM. |
| 3167 | */ |
| 3168 | continue_ffa_hyp_mem_retrieve_req = |
| 3169 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 3170 | (share_state->hypervisor_fragment_count != 0U) && |
J-Alves | 661e1b7 | 2023-08-02 13:39:40 +0100 | [diff] [blame] | 3171 | ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3172 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3173 | if (!continue_ffa_hyp_mem_retrieve_req) { |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3174 | receiver_index = ffa_memory_region_get_receiver_index( |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3175 | memory_region, to_locked.vm->id); |
| 3176 | |
| 3177 | if (receiver_index == memory_region->receiver_count) { |
| 3178 | dlog_verbose( |
| 3179 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
| 3180 | "borrower to memory sharing transaction (%x)\n", |
| 3181 | to_locked.vm->id, handle); |
| 3182 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3183 | goto out; |
| 3184 | } |
| 3185 | |
| 3186 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3187 | 0 || |
| 3188 | share_state->retrieved_fragment_count[receiver_index] >= |
| 3189 | share_state->fragment_count) { |
| 3190 | dlog_verbose( |
| 3191 | "Retrieval of memory with handle %#x not yet " |
| 3192 | "started or already completed (%d/%d fragments " |
| 3193 | "retrieved).\n", |
| 3194 | handle, |
| 3195 | share_state->retrieved_fragment_count |
| 3196 | [receiver_index], |
| 3197 | share_state->fragment_count); |
| 3198 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3199 | goto out; |
| 3200 | } |
| 3201 | |
| 3202 | fragment_index = |
| 3203 | share_state->retrieved_fragment_count[receiver_index]; |
| 3204 | } else { |
| 3205 | if (share_state->hypervisor_fragment_count == 0 || |
| 3206 | share_state->hypervisor_fragment_count >= |
| 3207 | share_state->fragment_count) { |
| 3208 | dlog_verbose( |
| 3209 | "Retrieve of memory with handle %x not " |
| 3210 | "started from hypervisor.\n", |
| 3211 | handle); |
| 3212 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3213 | goto out; |
| 3214 | } |
| 3215 | |
| 3216 | if (memory_region->sender != sender_vm_id) { |
| 3217 | dlog_verbose( |
| 3218 | "Sender ID (%x) is not as expected for memory " |
| 3219 | "handle %x\n", |
| 3220 | sender_vm_id, handle); |
| 3221 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3222 | goto out; |
| 3223 | } |
| 3224 | |
| 3225 | fragment_index = share_state->hypervisor_fragment_count; |
| 3226 | |
| 3227 | receiver_index = 0; |
| 3228 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3229 | |
| 3230 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3231 | * Check that the given fragment offset is correct by counting |
| 3232 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3233 | */ |
| 3234 | retrieved_constituents_count = 0; |
| 3235 | for (i = 0; i < fragment_index; ++i) { |
| 3236 | retrieved_constituents_count += |
| 3237 | share_state->fragment_constituent_counts[i]; |
| 3238 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 3239 | |
| 3240 | CHECK(memory_region->receiver_count > 0); |
| 3241 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3242 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 3243 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 3244 | memory_region, retrieved_constituents_count, |
| 3245 | to_locked.vm->ffa_version); |
| 3246 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3247 | if (fragment_offset != expected_fragment_offset) { |
| 3248 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 3249 | fragment_offset, expected_fragment_offset); |
| 3250 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3251 | goto out; |
| 3252 | } |
| 3253 | |
J-Alves | 4f0d9c1 | 2024-01-17 17:23:11 +0000 | [diff] [blame] | 3254 | /* |
| 3255 | * When hafnium is the hypervisor, acquire the RX buffer of a VM, that |
| 3256 | * is currently ownder by the SPMC. |
| 3257 | */ |
| 3258 | assert(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3259 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3260 | remaining_constituent_count = ffa_memory_fragment_init( |
| 3261 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 3262 | share_state->fragments[fragment_index], |
| 3263 | share_state->fragment_constituent_counts[fragment_index], |
| 3264 | &fragment_length); |
| 3265 | CHECK(remaining_constituent_count == 0); |
| 3266 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 3267 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 3268 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 3269 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3270 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 3271 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 3272 | share_state->retrieved_fragment_count[receiver_index]++; |
| 3273 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 3274 | share_state->fragment_count) { |
| 3275 | ffa_memory_retrieve_complete(share_states, share_state, |
| 3276 | page_pool); |
| 3277 | } |
| 3278 | } else { |
| 3279 | share_state->hypervisor_fragment_count++; |
| 3280 | |
| 3281 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 3282 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3283 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 3284 | .arg1 = (uint32_t)handle, |
| 3285 | .arg2 = (uint32_t)(handle >> 32), |
| 3286 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3287 | |
| 3288 | out: |
| 3289 | share_states_unlock(&share_states); |
| 3290 | dump_share_states(); |
| 3291 | return ret; |
| 3292 | } |
| 3293 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3294 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3295 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3296 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3297 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3298 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3299 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3300 | struct ffa_memory_share_state *share_state; |
| 3301 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3302 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3303 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3304 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3305 | bool receivers_relinquished_memory; |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3306 | ffa_memory_access_permissions_t receiver_permissions = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3307 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3308 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3309 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3310 | "Stream endpoints not supported (got %d " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 3311 | "endpoints on FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3312 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3313 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3314 | } |
| 3315 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3316 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3317 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3318 | "VM ID %d in relinquish message doesn't match " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 3319 | "calling VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 3320 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3321 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3322 | } |
| 3323 | |
| 3324 | dump_share_states(); |
| 3325 | |
| 3326 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3327 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3328 | if (share_state == NULL) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3329 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3330 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3331 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3332 | goto out; |
| 3333 | } |
| 3334 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3335 | if (!share_state->sending_complete) { |
| 3336 | dlog_verbose( |
| 3337 | "Memory with handle %#x not fully sent, can't " |
| 3338 | "relinquish.\n", |
| 3339 | handle); |
| 3340 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3341 | goto out; |
| 3342 | } |
| 3343 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3344 | memory_region = share_state->memory_region; |
| 3345 | CHECK(memory_region != NULL); |
| 3346 | |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3347 | receiver_index = ffa_memory_region_get_receiver_index( |
| 3348 | memory_region, from_locked.vm->id); |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3349 | |
| 3350 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3351 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3352 | "VM ID %d tried to relinquish memory region " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 3353 | "with handle %#x and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3354 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3355 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3356 | goto out; |
| 3357 | } |
| 3358 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3359 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3360 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3361 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3362 | "Memory with handle %#x not yet fully " |
| 3363 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3364 | "receiver %x can't relinquish.\n", |
| 3365 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3366 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3367 | goto out; |
| 3368 | } |
| 3369 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3370 | /* |
| 3371 | * Either clear if requested in relinquish call, or in a retrieve |
| 3372 | * request from one of the borrowers. |
| 3373 | */ |
| 3374 | receivers_relinquished_memory = true; |
| 3375 | |
| 3376 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3377 | struct ffa_memory_access *receiver = |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3378 | ffa_memory_region_get_receiver(memory_region, i); |
| 3379 | assert(receiver != NULL); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3380 | if (receiver->receiver_permissions.receiver == |
| 3381 | from_locked.vm->id) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3382 | receiver_permissions = |
| 3383 | receiver->receiver_permissions.permissions; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3384 | continue; |
| 3385 | } |
| 3386 | |
| 3387 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 3388 | receivers_relinquished_memory = false; |
| 3389 | break; |
| 3390 | } |
| 3391 | } |
| 3392 | |
| 3393 | clear = receivers_relinquished_memory && |
| 3394 | (share_state->clear_after_relinquish || |
| 3395 | (relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 3396 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3397 | |
| 3398 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3399 | * Clear is not allowed for memory that was shared, as the |
| 3400 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3401 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3402 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3403 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3404 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3405 | goto out; |
| 3406 | } |
| 3407 | |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame] | 3408 | if (clear && receiver_permissions == FFA_DATA_ACCESS_RO) { |
| 3409 | dlog_verbose("%s: RO memory can't use clear memory flag.\n", |
| 3410 | __func__); |
| 3411 | ret = ffa_error(FFA_DENIED); |
| 3412 | goto out; |
| 3413 | } |
| 3414 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3415 | ret = ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3416 | from_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3417 | share_state->fragment_constituent_counts, |
| 3418 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3419 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3420 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3421 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3422 | * Mark memory handle as not retrieved, so it can be |
| 3423 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3424 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3425 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3426 | } |
| 3427 | |
| 3428 | out: |
| 3429 | share_states_unlock(&share_states); |
| 3430 | dump_share_states(); |
| 3431 | return ret; |
| 3432 | } |
| 3433 | |
| 3434 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3435 | * Validates that the reclaim transition is allowed for the given |
| 3436 | * handle, updates the page table of the reclaiming VM, and frees the |
| 3437 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3438 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3439 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3440 | ffa_memory_handle_t handle, |
| 3441 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3442 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3443 | { |
| 3444 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3445 | struct ffa_memory_share_state *share_state; |
| 3446 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3447 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3448 | |
| 3449 | dump_share_states(); |
| 3450 | |
| 3451 | share_states = share_states_lock(); |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 3452 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3453 | share_state = get_share_state(share_states, handle); |
J-Alves | b56aac8 | 2023-11-10 09:44:43 +0000 | [diff] [blame] | 3454 | if (share_state == NULL) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3455 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3456 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3457 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3458 | goto out; |
| 3459 | } |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3460 | memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3461 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3462 | CHECK(memory_region != NULL); |
| 3463 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3464 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 3465 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3466 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 3467 | "VM %#x attempted to reclaim memory handle %#x " |
| 3468 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3469 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3470 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3471 | goto out; |
| 3472 | } |
| 3473 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3474 | if (!share_state->sending_complete) { |
| 3475 | dlog_verbose( |
| 3476 | "Memory with handle %#x not fully sent, can't " |
| 3477 | "reclaim.\n", |
| 3478 | handle); |
| 3479 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3480 | goto out; |
| 3481 | } |
| 3482 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3483 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3484 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 3485 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3486 | "Tried to reclaim memory handle %#x " |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3487 | "that has not been relinquished by all " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3488 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3489 | handle, |
Daniel Boulby | d5ae44b | 2023-12-12 12:18:11 +0000 | [diff] [blame] | 3490 | ffa_memory_region_get_receiver(memory_region, i) |
| 3491 | ->receiver_permissions.receiver); |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3492 | ret = ffa_error(FFA_DENIED); |
| 3493 | goto out; |
| 3494 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3495 | } |
| 3496 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3497 | ret = ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3498 | to_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3499 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 3500 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3501 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3502 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3503 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3504 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3505 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3506 | } |
| 3507 | |
| 3508 | out: |
| 3509 | share_states_unlock(&share_states); |
| 3510 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 3511 | } |