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" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 20 | #include "hf/ffa_internal.h" |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 21 | #include "hf/ffa_memory_internal.h" |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 22 | #include "hf/mm.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 23 | #include "hf/mpool.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 24 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 25 | #include "hf/vm.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 26 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 27 | #include "vmapi/hf/ffa_v1_0.h" |
| 28 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 29 | #define RECEIVERS_COUNT_IN_RETRIEVE_RESP 1 |
| 30 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 31 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 32 | * 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] | 33 | * by this lock. |
| 34 | */ |
| 35 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 36 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 37 | |
| 38 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 39 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 40 | */ |
| 41 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 42 | { |
| 43 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 44 | } |
| 45 | |
| 46 | /** |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 47 | * Initialises the next available `struct ffa_memory_share_state`. If `handle` |
| 48 | * is `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, |
| 49 | * otherwise uses the provided handle which is assumed to be globally unique. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 50 | * |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 51 | * Returns a pointer to the allocated `ffa_memory_share_state` on success or |
| 52 | * `NULL` if none are available. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 53 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 54 | struct ffa_memory_share_state *allocate_share_state( |
| 55 | struct share_states_locked share_states, uint32_t share_func, |
| 56 | struct ffa_memory_region *memory_region, uint32_t fragment_length, |
| 57 | ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 58 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 59 | assert(share_states.share_states != NULL); |
| 60 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 61 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 62 | for (uint64_t i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 63 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 64 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 65 | &share_states.share_states[i]; |
| 66 | struct ffa_composite_memory_region *composite = |
| 67 | ffa_memory_region_get_composite(memory_region, |
| 68 | 0); |
| 69 | |
| 70 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 71 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 72 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 73 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 74 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 75 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 76 | allocated_state->share_func = share_func; |
| 77 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 78 | allocated_state->fragment_count = 1; |
| 79 | allocated_state->fragments[0] = composite->constituents; |
| 80 | allocated_state->fragment_constituent_counts[0] = |
| 81 | (fragment_length - |
| 82 | ffa_composite_constituent_offset(memory_region, |
| 83 | 0)) / |
| 84 | sizeof(struct ffa_memory_region_constituent); |
| 85 | allocated_state->sending_complete = false; |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 86 | for (uint32_t j = 0; j < MAX_MEM_SHARE_RECIPIENTS; |
| 87 | ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 88 | allocated_state->retrieved_fragment_count[j] = |
| 89 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 90 | } |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 91 | return allocated_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 92 | } |
| 93 | } |
| 94 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 95 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | /** Locks the share states lock. */ |
| 99 | struct share_states_locked share_states_lock(void) |
| 100 | { |
| 101 | sl_lock(&share_states_lock_instance); |
| 102 | |
| 103 | return (struct share_states_locked){.share_states = share_states}; |
| 104 | } |
| 105 | |
| 106 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 107 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 108 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 109 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 110 | share_states->share_states = NULL; |
| 111 | sl_unlock(&share_states_lock_instance); |
| 112 | } |
| 113 | |
| 114 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 115 | * 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^] | 116 | * returns a pointer to the share state. Otherwise returns NULL. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 117 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 118 | struct ffa_memory_share_state *get_share_state( |
| 119 | struct share_states_locked share_states, ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 120 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 121 | struct ffa_memory_share_state *share_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 122 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 123 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 124 | |
| 125 | /* |
| 126 | * First look for a share_state allocated by us, in which case the |
| 127 | * handle is based on the index. |
| 128 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 129 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 130 | uint64_t index = ffa_memory_handle_get_index(handle); |
| 131 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 132 | if (index < MAX_MEM_SHARES) { |
| 133 | share_state = &share_states.share_states[index]; |
| 134 | if (share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 135 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 136 | } |
| 137 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 138 | } |
| 139 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 140 | /* Fall back to a linear scan. */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 141 | for (uint64_t index = 0; index < MAX_MEM_SHARES; ++index) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 142 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 143 | if (share_state->memory_region != NULL && |
| 144 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 145 | share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 146 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 147 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 148 | } |
| 149 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 150 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 154 | void share_state_free(struct share_states_locked share_states, |
| 155 | struct ffa_memory_share_state *share_state, |
| 156 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 157 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 158 | uint32_t i; |
| 159 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 160 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 161 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 162 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 163 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 164 | /* |
| 165 | * First fragment is part of the same page as the `memory_region`, so it |
| 166 | * doesn't need to be freed separately. |
| 167 | */ |
| 168 | share_state->fragments[0] = NULL; |
| 169 | share_state->fragment_constituent_counts[0] = 0; |
| 170 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 171 | mpool_free(page_pool, share_state->fragments[i]); |
| 172 | share_state->fragments[i] = NULL; |
| 173 | share_state->fragment_constituent_counts[i] = 0; |
| 174 | } |
| 175 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 176 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 177 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 178 | } |
| 179 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 180 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 181 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 182 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 183 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 184 | struct ffa_composite_memory_region *composite; |
| 185 | uint32_t expected_constituent_count; |
| 186 | uint32_t fragment_constituent_count_total = 0; |
| 187 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 188 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 189 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 190 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 191 | |
| 192 | /* |
| 193 | * Share state must already be valid, or it's not possible to get hold |
| 194 | * of it. |
| 195 | */ |
| 196 | CHECK(share_state->memory_region != NULL && |
| 197 | share_state->share_func != 0); |
| 198 | |
| 199 | composite = |
| 200 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 201 | expected_constituent_count = composite->constituent_count; |
| 202 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 203 | fragment_constituent_count_total += |
| 204 | share_state->fragment_constituent_counts[i]; |
| 205 | } |
| 206 | dlog_verbose( |
| 207 | "Checking completion: constituent count %d/%d from %d " |
| 208 | "fragments.\n", |
| 209 | fragment_constituent_count_total, expected_constituent_count, |
| 210 | share_state->fragment_count); |
| 211 | |
| 212 | return fragment_constituent_count_total == expected_constituent_count; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Calculates the offset of the next fragment expected for the given share |
| 217 | * state. |
| 218 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 219 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 220 | struct share_states_locked share_states, |
| 221 | struct ffa_memory_share_state *share_state) |
| 222 | { |
| 223 | uint32_t next_fragment_offset; |
| 224 | uint32_t i; |
| 225 | |
| 226 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 227 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 228 | |
| 229 | next_fragment_offset = |
| 230 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 231 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 232 | next_fragment_offset += |
| 233 | share_state->fragment_constituent_counts[i] * |
| 234 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 235 | } |
| 236 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 237 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 238 | } |
| 239 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 240 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 241 | { |
| 242 | uint32_t i; |
| 243 | |
| 244 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 245 | return; |
| 246 | } |
| 247 | |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 248 | dlog("from VM %#x, attributes %#x, flags %#x, tag %u, to " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 249 | "%u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 250 | "recipients [", |
| 251 | memory_region->sender, memory_region->attributes, |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 252 | memory_region->flags, memory_region->tag, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 253 | memory_region->receiver_count); |
| 254 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 255 | if (i != 0) { |
| 256 | dlog(", "); |
| 257 | } |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 258 | dlog("VM %#x: %#x (offset %u)", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 259 | memory_region->receivers[i].receiver_permissions.receiver, |
| 260 | memory_region->receivers[i] |
| 261 | .receiver_permissions.permissions, |
| 262 | memory_region->receivers[i] |
| 263 | .composite_memory_region_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 264 | } |
| 265 | dlog("]"); |
| 266 | } |
| 267 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 268 | void dump_share_states(void) |
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 | |
| 276 | dlog("Current share states:\n"); |
| 277 | sl_lock(&share_states_lock_instance); |
| 278 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 279 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 280 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 281 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 282 | dlog("SHARE"); |
| 283 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 284 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 285 | dlog("LEND"); |
| 286 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 287 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 288 | dlog("DONATE"); |
| 289 | break; |
| 290 | default: |
| 291 | dlog("invalid share_func %#x", |
| 292 | share_states[i].share_func); |
| 293 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 294 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 295 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 296 | if (share_states[i].sending_complete) { |
| 297 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 298 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 299 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 300 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 301 | dlog(" with %d fragments, %d retrieved, " |
| 302 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 303 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 304 | share_states[i].retrieved_fragment_count[0], |
| 305 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 306 | } |
| 307 | } |
| 308 | sl_unlock(&share_states_lock_instance); |
| 309 | } |
| 310 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 311 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 312 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 313 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 314 | { |
| 315 | uint32_t mode = 0; |
| 316 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 317 | switch (ffa_get_data_access_attr(permissions)) { |
| 318 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 319 | mode = MM_MODE_R; |
| 320 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 321 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 322 | mode = MM_MODE_R | MM_MODE_W; |
| 323 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 324 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 325 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 326 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 327 | case FFA_DATA_ACCESS_RESERVED: |
| 328 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 329 | } |
| 330 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 331 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 332 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 333 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 334 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 335 | mode |= MM_MODE_X; |
| 336 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 337 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 338 | mode |= (default_mode & MM_MODE_X); |
| 339 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 340 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 341 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 342 | } |
| 343 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 344 | /* Set the security state bit if necessary. */ |
| 345 | if ((default_mode & plat_ffa_other_world_mode()) != 0) { |
| 346 | mode |= plat_ffa_other_world_mode(); |
| 347 | } |
| 348 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 349 | return mode; |
| 350 | } |
| 351 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 352 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 353 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 354 | * 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] | 355 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 356 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 357 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 358 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 359 | struct ffa_memory_region_constituent **fragments, |
| 360 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 361 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 362 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 363 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 364 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 365 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 366 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 367 | * Fail if there are no constituents. Otherwise we would get an |
| 368 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 369 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 370 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 371 | } |
| 372 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 373 | for (i = 0; i < fragment_count; ++i) { |
| 374 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 375 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 376 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 377 | ipaddr_t end = ipa_add(begin, size); |
| 378 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 379 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 380 | /* Fail if addresses are not page-aligned. */ |
| 381 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 382 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
| 383 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 384 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 385 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 386 | /* |
| 387 | * Ensure that this constituent memory range is all |
| 388 | * mapped with the same mode. |
| 389 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 390 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 391 | return ffa_error(FFA_DENIED); |
| 392 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 393 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 394 | /* |
| 395 | * Ensure that all constituents are mapped with the same |
| 396 | * mode. |
| 397 | */ |
| 398 | if (i == 0) { |
| 399 | *orig_mode = current_mode; |
| 400 | } else if (current_mode != *orig_mode) { |
| 401 | dlog_verbose( |
| 402 | "Expected mode %#x but was %#x for %d " |
| 403 | "pages at %#x.\n", |
| 404 | *orig_mode, current_mode, |
| 405 | fragments[i][j].page_count, |
| 406 | ipa_addr(begin)); |
| 407 | return ffa_error(FFA_DENIED); |
| 408 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 409 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 410 | } |
| 411 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 412 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | /** |
| 416 | * Verify that all pages have the same mode, that the starting mode |
| 417 | * constitutes a valid state and obtain the next mode to apply |
| 418 | * to the sending VM. |
| 419 | * |
| 420 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 421 | * 1) FFA_DENIED if a state transition was not found; |
| 422 | * 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] | 423 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 424 | * 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] | 425 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 426 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 427 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 428 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 429 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 430 | struct vm_locked from, uint32_t share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 431 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 432 | uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 433 | struct ffa_memory_region_constituent **fragments, |
| 434 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 435 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 436 | { |
| 437 | const uint32_t state_mask = |
| 438 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 439 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 440 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 441 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 442 | fragment_constituent_counts, |
| 443 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 444 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 445 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 446 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 449 | /* Ensure the address range is normal memory and not a device. */ |
| 450 | if (*orig_from_mode & MM_MODE_D) { |
| 451 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 452 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 453 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Ensure the sender is the owner and has exclusive access to the |
| 458 | * memory. |
| 459 | */ |
| 460 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 461 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 462 | } |
| 463 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 464 | assert(receivers != NULL && receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 465 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 466 | for (uint32_t i = 0U; i < receivers_count; i++) { |
| 467 | ffa_memory_access_permissions_t permissions = |
| 468 | receivers[i].receiver_permissions.permissions; |
| 469 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 470 | permissions, *orig_from_mode); |
| 471 | |
| 472 | if ((*orig_from_mode & required_from_mode) != |
| 473 | required_from_mode) { |
| 474 | dlog_verbose( |
| 475 | "Sender tried to send memory with permissions " |
| 476 | "which " |
| 477 | "required mode %#x but only had %#x itself.\n", |
| 478 | required_from_mode, *orig_from_mode); |
| 479 | return ffa_error(FFA_DENIED); |
| 480 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /* Find the appropriate new mode. */ |
| 484 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 485 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 486 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 487 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 488 | break; |
| 489 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 490 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 491 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 492 | break; |
| 493 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 494 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 495 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 496 | break; |
| 497 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 498 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 499 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 500 | } |
| 501 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 502 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 505 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 506 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 507 | struct ffa_memory_region_constituent **fragments, |
| 508 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 509 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 510 | { |
| 511 | const uint32_t state_mask = |
| 512 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 513 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 514 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 515 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 516 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 517 | fragment_constituent_counts, |
| 518 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 519 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 520 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | /* Ensure the address range is normal memory and not a device. */ |
| 524 | if (*orig_from_mode & MM_MODE_D) { |
| 525 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 526 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 527 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Ensure the relinquishing VM is not the owner but has access to the |
| 532 | * memory. |
| 533 | */ |
| 534 | orig_from_state = *orig_from_mode & state_mask; |
| 535 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 536 | dlog_verbose( |
| 537 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 538 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 539 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 540 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | /* Find the appropriate new mode. */ |
| 544 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 545 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 546 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | /** |
| 550 | * Verify that all pages have the same mode, that the starting mode |
| 551 | * constitutes a valid state and obtain the next mode to apply |
| 552 | * to the retrieving VM. |
| 553 | * |
| 554 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 555 | * 1) FFA_DENIED if a state transition was not found; |
| 556 | * 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] | 557 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 558 | * 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] | 559 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 560 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 561 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 562 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 563 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 564 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 565 | struct ffa_memory_region_constituent **fragments, |
| 566 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 567 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 568 | { |
| 569 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 570 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 571 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 572 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 573 | fragment_constituent_counts, |
| 574 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 575 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 576 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 577 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 580 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 581 | /* |
| 582 | * If the original ffa memory send call has been processed |
| 583 | * successfully, it is expected the orig_to_mode would overlay |
| 584 | * with `state_mask`, as a result of the function |
| 585 | * `ffa_send_check_transition`. |
| 586 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 587 | if (vm_id_is_current_world(to.vm->id)) { |
| 588 | assert((orig_to_mode & |
| 589 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 590 | MM_MODE_SHARED)) != 0U); |
| 591 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 592 | } else { |
| 593 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 594 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 595 | * Ensure the retriever has the expected state. We don't care |
| 596 | * about the MM_MODE_SHARED bit; either with or without it set |
| 597 | * are both valid representations of the !O-NA state. |
| 598 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 599 | if (vm_id_is_current_world(to.vm->id) && |
| 600 | to.vm->id != HF_PRIMARY_VM_ID && |
| 601 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 602 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 603 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 604 | } |
| 605 | } |
| 606 | |
| 607 | /* Find the appropriate new mode. */ |
| 608 | *to_mode = memory_to_attributes; |
| 609 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 610 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 611 | *to_mode |= 0; |
| 612 | break; |
| 613 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 614 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 615 | *to_mode |= MM_MODE_UNOWNED; |
| 616 | break; |
| 617 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 618 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 619 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 620 | break; |
| 621 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 622 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 623 | *to_mode |= 0; |
| 624 | break; |
| 625 | |
| 626 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 627 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 628 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 629 | } |
| 630 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 631 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 632 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 633 | |
| 634 | /** |
| 635 | * Updates a VM's page table such that the given set of physical address ranges |
| 636 | * are mapped in the address space at the corresponding address ranges, in the |
| 637 | * mode provided. |
| 638 | * |
| 639 | * If commit is false, the page tables will be allocated from the mpool but no |
| 640 | * mappings will actually be updated. This function must always be called first |
| 641 | * with commit false to check that it will succeed before calling with commit |
| 642 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 643 | * series of changes atomically you can call them all with commit false before |
| 644 | * calling them all with commit true. |
| 645 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 646 | * vm_ptable_defrag should always be called after a series of page table |
| 647 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 648 | * |
| 649 | * Returns true on success, or false if the update failed and no changes were |
| 650 | * made to memory mappings. |
| 651 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 652 | bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 653 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 654 | struct ffa_memory_region_constituent **fragments, |
| 655 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 656 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 657 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 658 | uint32_t i; |
| 659 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 660 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 661 | if (vm_locked.vm->el0_partition) { |
| 662 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 663 | } |
| 664 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 665 | /* Iterate over the memory region constituents within each fragment. */ |
| 666 | for (i = 0; i < fragment_count; ++i) { |
| 667 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 668 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 669 | paddr_t pa_begin = |
| 670 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 671 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 672 | uint32_t pa_bits = |
| 673 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 674 | |
| 675 | /* |
| 676 | * Ensure the requested region falls into system's PA |
| 677 | * range. |
| 678 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 679 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 680 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 681 | dlog_error("Region is outside of PA Range\n"); |
| 682 | return false; |
| 683 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 684 | |
| 685 | if (commit) { |
| 686 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 687 | mode, ppool, NULL); |
| 688 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 689 | pa_end, mode, ppool)) { |
| 690 | return false; |
| 691 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 692 | } |
| 693 | } |
| 694 | |
| 695 | return true; |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 700 | * flushed from the cache so the memory has been cleared across the system. |
| 701 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 702 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 703 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 704 | { |
| 705 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 706 | * 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] | 707 | * global mapping of the whole range. Such an approach will limit |
| 708 | * the changes to stage-1 tables and will allow only local |
| 709 | * invalidation. |
| 710 | */ |
| 711 | bool ret; |
| 712 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 713 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 714 | MM_MODE_W | (extra_mode_attributes & |
| 715 | plat_ffa_other_world_mode()), |
| 716 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 717 | size_t size = pa_difference(begin, end); |
| 718 | |
| 719 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 720 | goto fail; |
| 721 | } |
| 722 | |
| 723 | memset_s(ptr, size, 0, size); |
| 724 | arch_mm_flush_dcache(ptr, size); |
| 725 | mm_unmap(stage1_locked, begin, end, ppool); |
| 726 | |
| 727 | ret = true; |
| 728 | goto out; |
| 729 | |
| 730 | fail: |
| 731 | ret = false; |
| 732 | |
| 733 | out: |
| 734 | mm_unlock_stage1(&stage1_locked); |
| 735 | |
| 736 | return ret; |
| 737 | } |
| 738 | |
| 739 | /** |
| 740 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 741 | * flushed from the cache so the memory has been cleared across the system. |
| 742 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 743 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 744 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 745 | struct ffa_memory_region_constituent **fragments, |
| 746 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 747 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 748 | { |
| 749 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 750 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 751 | bool ret = false; |
| 752 | |
| 753 | /* |
| 754 | * Create a local pool so any freed memory can't be used by another |
| 755 | * thread. This is to ensure each constituent that is mapped can be |
| 756 | * unmapped again afterwards. |
| 757 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 758 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 759 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 760 | /* Iterate over the memory region constituents within each fragment. */ |
| 761 | for (i = 0; i < fragment_count; ++i) { |
| 762 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 763 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 764 | for (j = 0; j < fragment_constituent_counts[j]; ++j) { |
| 765 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 766 | paddr_t begin = |
| 767 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 768 | paddr_t end = pa_add(begin, size); |
| 769 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 770 | if (!clear_memory(begin, end, &local_page_pool, |
| 771 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 772 | /* |
| 773 | * api_clear_memory will defrag on failure, so |
| 774 | * no need to do it here. |
| 775 | */ |
| 776 | goto out; |
| 777 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 778 | } |
| 779 | } |
| 780 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 781 | ret = true; |
| 782 | |
| 783 | out: |
| 784 | mpool_fini(&local_page_pool); |
| 785 | return ret; |
| 786 | } |
| 787 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 788 | static bool is_memory_range_within(ipaddr_t begin, ipaddr_t end, |
| 789 | ipaddr_t in_begin, ipaddr_t in_end) |
| 790 | { |
| 791 | return (ipa_addr(begin) >= ipa_addr(in_begin) && |
| 792 | ipa_addr(begin) < ipa_addr(in_end)) || |
| 793 | (ipa_addr(end) <= ipa_addr(in_end) && |
| 794 | ipa_addr(end) > ipa_addr(in_begin)); |
| 795 | } |
| 796 | |
| 797 | /** |
| 798 | * Receives a memory range and looks for overlaps with the remainder |
| 799 | * constituents of the memory share/lend/donate operation. Assumes they are |
| 800 | * passed in order to avoid having to loop over all the elements at each call. |
| 801 | * The function only compares the received memory ranges with those that follow |
| 802 | * within the same fragment, and subsequent fragments from the same operation. |
| 803 | */ |
| 804 | static bool ffa_memory_check_overlap( |
| 805 | struct ffa_memory_region_constituent **fragments, |
| 806 | const uint32_t *fragment_constituent_counts, |
| 807 | const uint32_t fragment_count, const uint32_t current_fragment, |
| 808 | const uint32_t current_constituent) |
| 809 | { |
| 810 | uint32_t i = current_fragment; |
| 811 | uint32_t j = current_constituent; |
| 812 | ipaddr_t current_begin = ipa_init(fragments[i][j].address); |
| 813 | const uint32_t current_page_count = fragments[i][j].page_count; |
| 814 | size_t current_size = current_page_count * PAGE_SIZE; |
| 815 | ipaddr_t current_end = ipa_add(current_begin, current_size - 1); |
| 816 | |
| 817 | if (current_size == 0 || |
| 818 | current_size > UINT64_MAX - ipa_addr(current_begin)) { |
| 819 | dlog_verbose("Invalid page count. Addr: %x page_count: %x\n", |
| 820 | current_begin, current_page_count); |
| 821 | return false; |
| 822 | } |
| 823 | |
| 824 | for (; i < fragment_count; i++) { |
| 825 | j = (i == current_fragment) ? j + 1 : 0; |
| 826 | |
| 827 | for (; j < fragment_constituent_counts[i]; j++) { |
| 828 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 829 | const uint32_t page_count = fragments[i][j].page_count; |
| 830 | size_t size = page_count * PAGE_SIZE; |
| 831 | ipaddr_t end = ipa_add(begin, size - 1); |
| 832 | |
| 833 | if (size == 0 || size > UINT64_MAX - ipa_addr(begin)) { |
| 834 | dlog_verbose( |
| 835 | "Invalid page count. Addr: %x " |
| 836 | "page_count: %x\n", |
| 837 | begin, page_count); |
| 838 | return false; |
| 839 | } |
| 840 | |
| 841 | /* |
| 842 | * Check if current ranges is within begin and end, as |
| 843 | * well as the reverse. This should help optimize the |
| 844 | * loop, and reduce the number of iterations. |
| 845 | */ |
| 846 | if (is_memory_range_within(begin, end, current_begin, |
| 847 | current_end) || |
| 848 | is_memory_range_within(current_begin, current_end, |
| 849 | begin, end)) { |
| 850 | dlog_verbose( |
| 851 | "Overlapping memory ranges: %#x - %#x " |
| 852 | "with %#x - %#x\n", |
| 853 | ipa_addr(begin), ipa_addr(end), |
| 854 | ipa_addr(current_begin), |
| 855 | ipa_addr(current_end)); |
| 856 | return true; |
| 857 | } |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | return false; |
| 862 | } |
| 863 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 864 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 865 | * 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] | 866 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 867 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 868 | * |
| 869 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 870 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 871 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 872 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 873 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 874 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 875 | * 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] | 876 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 877 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 878 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 879 | struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 880 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 881 | struct ffa_memory_region_constituent **fragments, |
| 882 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 883 | uint32_t composite_total_page_count, uint32_t share_func, |
| 884 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 885 | struct mpool *page_pool, bool clear, uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 886 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 887 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 888 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 889 | uint32_t orig_from_mode; |
| 890 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 891 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 892 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 893 | uint32_t constituents_total_page_count = 0; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 894 | |
| 895 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 896 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 897 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 898 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 899 | for (i = 0; i < fragment_count; ++i) { |
| 900 | if (!is_aligned(fragments[i], 8)) { |
| 901 | dlog_verbose("Constituents not aligned.\n"); |
| 902 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 903 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 904 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 905 | constituents_total_page_count += |
| 906 | fragments[i][j].page_count; |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 907 | if (ffa_memory_check_overlap( |
| 908 | fragments, fragment_constituent_counts, |
| 909 | fragment_count, i, j)) { |
| 910 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 911 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 912 | } |
| 913 | } |
| 914 | |
| 915 | if (constituents_total_page_count != composite_total_page_count) { |
| 916 | dlog_verbose( |
| 917 | "Composite page count differs from calculated page " |
| 918 | "count from constituents.\n"); |
| 919 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 923 | * Check if the state transition is lawful for the sender, ensure that |
| 924 | * all constituents of a memory region being shared are at the same |
| 925 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 926 | */ |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 927 | ret = ffa_send_check_transition(from_locked, share_func, receivers, |
| 928 | receivers_count, &orig_from_mode, |
| 929 | fragments, fragment_constituent_counts, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 930 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 931 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 932 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 933 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 934 | } |
| 935 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 936 | if (orig_from_mode_ret != NULL) { |
| 937 | *orig_from_mode_ret = orig_from_mode; |
| 938 | } |
| 939 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 940 | /* |
| 941 | * Create a local pool so any freed memory can't be used by another |
| 942 | * thread. This is to ensure the original mapping can be restored if the |
| 943 | * clear fails. |
| 944 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 945 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 946 | |
| 947 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 948 | * First reserve all required memory for the new page table entries |
| 949 | * without committing, to make sure the entire operation will succeed |
| 950 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 951 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 952 | if (!ffa_region_group_identity_map( |
| 953 | from_locked, fragments, fragment_constituent_counts, |
| 954 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 955 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 956 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 957 | goto out; |
| 958 | } |
| 959 | |
| 960 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 961 | * Update the mapping for the sender. This won't allocate because the |
| 962 | * transaction was already prepared above, but may free pages in the |
| 963 | * case that a whole block is being unmapped that was previously |
| 964 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 965 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 966 | CHECK(ffa_region_group_identity_map( |
| 967 | from_locked, fragments, fragment_constituent_counts, |
| 968 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 969 | |
| 970 | /* 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] | 971 | if (clear && |
| 972 | !ffa_clear_memory_constituents( |
| 973 | plat_ffa_owner_world_mode(from_locked.vm->id), fragments, |
| 974 | fragment_constituent_counts, fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 975 | /* |
| 976 | * On failure, roll back by returning memory to the sender. This |
| 977 | * may allocate pages which were previously freed into |
| 978 | * `local_page_pool` by the call above, but will never allocate |
| 979 | * more pages than that so can never fail. |
| 980 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 981 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 982 | from_locked, fragments, fragment_constituent_counts, |
| 983 | fragment_count, orig_from_mode, &local_page_pool, |
| 984 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 985 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 986 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 987 | goto out; |
| 988 | } |
| 989 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 990 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 991 | |
| 992 | out: |
| 993 | mpool_fini(&local_page_pool); |
| 994 | |
| 995 | /* |
| 996 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 997 | * error) or merging entries into blocks where possible (on success). |
| 998 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 999 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1000 | |
| 1001 | return ret; |
| 1002 | } |
| 1003 | |
| 1004 | /** |
| 1005 | * Validates and maps memory shared from one VM to another. |
| 1006 | * |
| 1007 | * This function requires the calling context to hold the <to> lock. |
| 1008 | * |
| 1009 | * Returns: |
| 1010 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1011 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1012 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1013 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1014 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1015 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1016 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1017 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1018 | struct vm_locked to_locked, ffa_vm_id_t from_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1019 | struct ffa_memory_region_constituent **fragments, |
| 1020 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1021 | uint32_t memory_to_attributes, uint32_t share_func, bool clear, |
| 1022 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1023 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1024 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1025 | uint32_t to_mode; |
| 1026 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1027 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1028 | |
| 1029 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1030 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1031 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1032 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1033 | for (i = 0; i < fragment_count; ++i) { |
| 1034 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1035 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1036 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1037 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Check if the state transition is lawful for the recipient, and ensure |
| 1042 | * that all constituents of the memory region being retrieved are at the |
| 1043 | * same state. |
| 1044 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1045 | ret = ffa_retrieve_check_transition( |
| 1046 | to_locked, share_func, fragments, fragment_constituent_counts, |
| 1047 | fragment_count, memory_to_attributes, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1048 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1049 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1050 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1051 | } |
| 1052 | |
| 1053 | /* |
| 1054 | * Create a local pool so any freed memory can't be used by another |
| 1055 | * thread. This is to ensure the original mapping can be restored if the |
| 1056 | * clear fails. |
| 1057 | */ |
| 1058 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1059 | |
| 1060 | /* |
| 1061 | * First reserve all required memory for the new page table entries in |
| 1062 | * the recipient page tables without committing, to make sure the entire |
| 1063 | * operation will succeed without exhausting the page pool. |
| 1064 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1065 | if (!ffa_region_group_identity_map( |
| 1066 | to_locked, fragments, fragment_constituent_counts, |
| 1067 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1068 | /* TODO: partial defrag of failed range. */ |
| 1069 | dlog_verbose( |
| 1070 | "Insufficient memory to update recipient page " |
| 1071 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1072 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1073 | goto out; |
| 1074 | } |
| 1075 | |
| 1076 | /* 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] | 1077 | if (clear && |
| 1078 | !ffa_clear_memory_constituents( |
| 1079 | plat_ffa_owner_world_mode(from_id), fragments, |
| 1080 | fragment_constituent_counts, fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1081 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1082 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1083 | goto out; |
| 1084 | } |
| 1085 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1086 | /* |
| 1087 | * Complete the transfer by mapping the memory into the recipient. This |
| 1088 | * won't allocate because the transaction was already prepared above, so |
| 1089 | * it doesn't need to use the `local_page_pool`. |
| 1090 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1091 | CHECK(ffa_region_group_identity_map( |
| 1092 | to_locked, fragments, fragment_constituent_counts, |
| 1093 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1094 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1095 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1096 | |
| 1097 | out: |
| 1098 | mpool_fini(&local_page_pool); |
| 1099 | |
| 1100 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1101 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1102 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1103 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1104 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1105 | |
| 1106 | return ret; |
| 1107 | } |
| 1108 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1109 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 1110 | struct vm_locked from_locked, ffa_vm_id_t owner_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1111 | struct ffa_memory_region_constituent **fragments, |
| 1112 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1113 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1114 | { |
| 1115 | uint32_t orig_from_mode; |
| 1116 | uint32_t from_mode; |
| 1117 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1118 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1119 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1120 | ret = ffa_relinquish_check_transition( |
| 1121 | from_locked, &orig_from_mode, fragments, |
| 1122 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1123 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1124 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1125 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | /* |
| 1129 | * Create a local pool so any freed memory can't be used by another |
| 1130 | * thread. This is to ensure the original mapping can be restored if the |
| 1131 | * clear fails. |
| 1132 | */ |
| 1133 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1134 | |
| 1135 | /* |
| 1136 | * First reserve all required memory for the new page table entries |
| 1137 | * without committing, to make sure the entire operation will succeed |
| 1138 | * without exhausting the page pool. |
| 1139 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1140 | if (!ffa_region_group_identity_map( |
| 1141 | from_locked, fragments, fragment_constituent_counts, |
| 1142 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1143 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1144 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1145 | goto out; |
| 1146 | } |
| 1147 | |
| 1148 | /* |
| 1149 | * Update the mapping for the sender. This won't allocate because the |
| 1150 | * transaction was already prepared above, but may free pages in the |
| 1151 | * case that a whole block is being unmapped that was previously |
| 1152 | * partially mapped. |
| 1153 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1154 | CHECK(ffa_region_group_identity_map( |
| 1155 | from_locked, fragments, fragment_constituent_counts, |
| 1156 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1157 | |
| 1158 | /* 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] | 1159 | if (clear && |
| 1160 | !ffa_clear_memory_constituents( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 1161 | plat_ffa_owner_world_mode(owner_id), fragments, |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1162 | fragment_constituent_counts, fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1163 | /* |
| 1164 | * On failure, roll back by returning memory to the sender. This |
| 1165 | * may allocate pages which were previously freed into |
| 1166 | * `local_page_pool` by the call above, but will never allocate |
| 1167 | * more pages than that so can never fail. |
| 1168 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1169 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1170 | from_locked, fragments, fragment_constituent_counts, |
| 1171 | fragment_count, orig_from_mode, &local_page_pool, |
| 1172 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1173 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1174 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1175 | goto out; |
| 1176 | } |
| 1177 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1178 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1179 | |
| 1180 | out: |
| 1181 | mpool_fini(&local_page_pool); |
| 1182 | |
| 1183 | /* |
| 1184 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1185 | * error) or merging entries into blocks where possible (on success). |
| 1186 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1187 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1188 | |
| 1189 | return ret; |
| 1190 | } |
| 1191 | |
| 1192 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1193 | * Complete a memory sending operation by checking that it is valid, updating |
| 1194 | * the sender page table, and then either marking the share state as having |
| 1195 | * completed sending (on success) or freeing it (on failure). |
| 1196 | * |
| 1197 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1198 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1199 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1200 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1201 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1202 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1203 | { |
| 1204 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1205 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1206 | struct ffa_value ret; |
| 1207 | |
| 1208 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1209 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1210 | assert(memory_region != NULL); |
| 1211 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1212 | assert(composite != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1213 | |
| 1214 | /* Check that state is valid in sender page table and update. */ |
| 1215 | ret = ffa_send_check_update( |
| 1216 | from_locked, share_state->fragments, |
| 1217 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1218 | share_state->fragment_count, composite->page_count, |
| 1219 | share_state->share_func, memory_region->receivers, |
| 1220 | memory_region->receiver_count, page_pool, |
| 1221 | memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1222 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1223 | if (ret.func != FFA_SUCCESS_32) { |
| 1224 | /* |
| 1225 | * Free share state, it failed to send so it can't be retrieved. |
| 1226 | */ |
| 1227 | dlog_verbose("Complete failed, freeing share state.\n"); |
| 1228 | share_state_free(share_states, share_state, page_pool); |
| 1229 | return ret; |
| 1230 | } |
| 1231 | |
| 1232 | share_state->sending_complete = true; |
| 1233 | dlog_verbose("Marked sending complete.\n"); |
| 1234 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1235 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1236 | } |
| 1237 | |
| 1238 | /** |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1239 | * Check that the memory attributes match Hafnium expectations: |
| 1240 | * Normal Memory, Inner shareable, Write-Back Read-Allocate |
| 1241 | * Write-Allocate Cacheable. |
| 1242 | */ |
| 1243 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1244 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1245 | { |
| 1246 | enum ffa_memory_type memory_type; |
| 1247 | enum ffa_memory_cacheability cacheability; |
| 1248 | enum ffa_memory_shareability shareability; |
| 1249 | |
| 1250 | memory_type = ffa_get_memory_type_attr(attributes); |
| 1251 | if (memory_type != FFA_MEMORY_NORMAL_MEM) { |
| 1252 | dlog_verbose("Invalid memory type %#x, expected %#x.\n", |
| 1253 | memory_type, FFA_MEMORY_NORMAL_MEM); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1254 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | cacheability = ffa_get_memory_cacheability_attr(attributes); |
| 1258 | if (cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1259 | dlog_verbose("Invalid cacheability %#x, expected %#x.\n", |
| 1260 | cacheability, FFA_MEMORY_CACHE_WRITE_BACK); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1261 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1262 | } |
| 1263 | |
| 1264 | shareability = ffa_get_memory_shareability_attr(attributes); |
| 1265 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
| 1266 | dlog_verbose("Invalid shareability %#x, expected #%x.\n", |
| 1267 | shareability, FFA_MEMORY_INNER_SHAREABLE); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1268 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1269 | } |
| 1270 | |
| 1271 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1272 | } |
| 1273 | |
| 1274 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1275 | * Check that the given `memory_region` represents a valid memory send request |
| 1276 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1277 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1278 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1279 | * 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] | 1280 | * not. |
| 1281 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1282 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1283 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1284 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1285 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1286 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1287 | struct ffa_composite_memory_region *composite; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1288 | uint64_t receivers_end; |
| 1289 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1290 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1291 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1292 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1293 | enum ffa_data_access data_access; |
| 1294 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1295 | enum ffa_memory_security security_state; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1296 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1297 | const size_t minimum_first_fragment_length = |
| 1298 | (sizeof(struct ffa_memory_region) + |
| 1299 | sizeof(struct ffa_memory_access) + |
| 1300 | sizeof(struct ffa_composite_memory_region)); |
| 1301 | |
| 1302 | if (fragment_length < minimum_first_fragment_length) { |
| 1303 | dlog_verbose("Fragment length %u too short (min %u).\n", |
| 1304 | (size_t)fragment_length, |
| 1305 | minimum_first_fragment_length); |
| 1306 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1307 | } |
| 1308 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1309 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1310 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1311 | if (!is_aligned(fragment_length, |
| 1312 | sizeof(struct ffa_memory_region_constituent)) || |
| 1313 | !is_aligned(memory_share_length, |
| 1314 | sizeof(struct ffa_memory_region_constituent))) { |
| 1315 | dlog_verbose( |
| 1316 | "Fragment length %u or total length %u" |
| 1317 | " is not 16-byte aligned.\n", |
| 1318 | fragment_length, memory_share_length); |
| 1319 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1320 | } |
| 1321 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1322 | if (fragment_length > memory_share_length) { |
| 1323 | dlog_verbose( |
| 1324 | "Fragment length %u greater than total length %u.\n", |
| 1325 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1326 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1327 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1328 | |
J-Alves | 0b6653d | 2022-04-22 13:17:38 +0100 | [diff] [blame] | 1329 | assert(memory_region->receivers_offset == |
| 1330 | offsetof(struct ffa_memory_region, receivers)); |
| 1331 | assert(memory_region->memory_access_desc_size == |
| 1332 | sizeof(struct ffa_memory_access)); |
| 1333 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1334 | /* The sender must match the caller. */ |
| 1335 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1336 | vm_id_is_current_world(memory_region->sender)) || |
| 1337 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1338 | memory_region->sender != from_locked.vm->id)) { |
| 1339 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1340 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1341 | } |
| 1342 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1343 | if (memory_region->receiver_count <= 0) { |
| 1344 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1345 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1346 | } |
| 1347 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1348 | /* |
| 1349 | * Ensure that the composite header is within the memory bounds and |
| 1350 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 1351 | * to prevent overflow. |
| 1352 | */ |
| 1353 | receivers_end = ((uint64_t)sizeof(struct ffa_memory_access) * |
| 1354 | (uint64_t)memory_region->receiver_count) + |
| 1355 | sizeof(struct ffa_memory_region); |
| 1356 | min_length = receivers_end + |
| 1357 | sizeof(struct ffa_composite_memory_region) + |
| 1358 | sizeof(struct ffa_memory_region_constituent); |
| 1359 | if (min_length > memory_share_length) { |
| 1360 | dlog_verbose("Share too short: got %u but minimum is %u.\n", |
| 1361 | (size_t)memory_share_length, (size_t)min_length); |
| 1362 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1363 | } |
| 1364 | |
| 1365 | composite_memory_region_offset = |
| 1366 | memory_region->receivers[0].composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1367 | |
| 1368 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1369 | * Check that the composite memory region descriptor is after the access |
| 1370 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 1371 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1372 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1373 | if ((composite_memory_region_offset < receivers_end) || |
| 1374 | (composite_memory_region_offset % 16 != 0) || |
| 1375 | (composite_memory_region_offset > |
| 1376 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 1377 | dlog_verbose( |
| 1378 | "Invalid composite memory region descriptor offset " |
| 1379 | "%u.\n", |
| 1380 | (size_t)composite_memory_region_offset); |
| 1381 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1382 | } |
| 1383 | |
| 1384 | /* |
| 1385 | * Compute the start of the constituent regions. Already checked |
| 1386 | * to be not more than fragment_length and thus not more than |
| 1387 | * memory_share_length. |
| 1388 | */ |
| 1389 | constituents_start = composite_memory_region_offset + |
| 1390 | sizeof(struct ffa_composite_memory_region); |
| 1391 | constituents_length = memory_share_length - constituents_start; |
| 1392 | |
| 1393 | /* |
| 1394 | * Check that the number of constituents is consistent with the length |
| 1395 | * of the constituent region. |
| 1396 | */ |
| 1397 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1398 | if ((constituents_length % |
| 1399 | sizeof(struct ffa_memory_region_constituent) != |
| 1400 | 0) || |
| 1401 | ((constituents_length / |
| 1402 | sizeof(struct ffa_memory_region_constituent)) != |
| 1403 | composite->constituent_count)) { |
| 1404 | dlog_verbose("Invalid length %u or composite offset %u.\n", |
| 1405 | (size_t)memory_share_length, |
| 1406 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1407 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1408 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1409 | if (fragment_length < memory_share_length && |
| 1410 | fragment_length < HF_MAILBOX_SIZE) { |
| 1411 | dlog_warning( |
| 1412 | "Initial fragment length %d smaller than mailbox " |
| 1413 | "size.\n", |
| 1414 | fragment_length); |
| 1415 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1416 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1417 | /* |
| 1418 | * Clear is not allowed for memory sharing, as the sender still has |
| 1419 | * access to the memory. |
| 1420 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1421 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1422 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1423 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1424 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1425 | } |
| 1426 | |
| 1427 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1428 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1429 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1430 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1431 | } |
| 1432 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1433 | /* Check that the permissions are valid, for each specified receiver. */ |
| 1434 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
| 1435 | ffa_memory_access_permissions_t permissions = |
| 1436 | memory_region->receivers[i] |
| 1437 | .receiver_permissions.permissions; |
| 1438 | ffa_vm_id_t receiver_id = |
| 1439 | memory_region->receivers[i] |
| 1440 | .receiver_permissions.receiver; |
| 1441 | |
| 1442 | if (memory_region->sender == receiver_id) { |
| 1443 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1444 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1445 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 1446 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1447 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 1448 | j++) { |
| 1449 | if (receiver_id == |
| 1450 | memory_region->receivers[j] |
| 1451 | .receiver_permissions.receiver) { |
| 1452 | dlog_verbose( |
| 1453 | "Repeated receiver(%x) in memory send " |
| 1454 | "operation.\n", |
| 1455 | memory_region->receivers[j] |
| 1456 | .receiver_permissions.receiver); |
| 1457 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1458 | } |
| 1459 | } |
| 1460 | |
| 1461 | if (composite_memory_region_offset != |
| 1462 | memory_region->receivers[i] |
| 1463 | .composite_memory_region_offset) { |
| 1464 | dlog_verbose( |
| 1465 | "All ffa_memory_access should point to the " |
| 1466 | "same composite memory region offset.\n"); |
| 1467 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1468 | } |
| 1469 | |
| 1470 | data_access = ffa_get_data_access_attr(permissions); |
| 1471 | instruction_access = |
| 1472 | ffa_get_instruction_access_attr(permissions); |
| 1473 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1474 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 1475 | dlog_verbose( |
| 1476 | "Reserved value for receiver permissions " |
| 1477 | "%#x.\n", |
| 1478 | permissions); |
| 1479 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1480 | } |
| 1481 | if (instruction_access != |
| 1482 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 1483 | dlog_verbose( |
| 1484 | "Invalid instruction access permissions %#x " |
| 1485 | "for sending memory.\n", |
| 1486 | permissions); |
| 1487 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1488 | } |
| 1489 | if (share_func == FFA_MEM_SHARE_32) { |
| 1490 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1491 | dlog_verbose( |
| 1492 | "Invalid data access permissions %#x " |
| 1493 | "for sharing memory.\n", |
| 1494 | permissions); |
| 1495 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1496 | } |
| 1497 | /* |
| 1498 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 1499 | * spec, NX is required for share operations (but must |
| 1500 | * not be specified by the sender) so set it in the |
| 1501 | * copy that we store, ready to be returned to the |
| 1502 | * retriever. |
| 1503 | */ |
J-Alves | b19731a | 2022-06-20 17:30:33 +0100 | [diff] [blame] | 1504 | if (vm_id_is_current_world(receiver_id)) { |
| 1505 | ffa_set_instruction_access_attr( |
| 1506 | &permissions, |
| 1507 | FFA_INSTRUCTION_ACCESS_NX); |
| 1508 | memory_region->receivers[i] |
| 1509 | .receiver_permissions.permissions = |
| 1510 | permissions; |
| 1511 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1512 | } |
| 1513 | if (share_func == FFA_MEM_LEND_32 && |
| 1514 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1515 | dlog_verbose( |
| 1516 | "Invalid data access permissions %#x for " |
| 1517 | "lending memory.\n", |
| 1518 | permissions); |
| 1519 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1520 | } |
| 1521 | |
| 1522 | if (share_func == FFA_MEM_DONATE_32 && |
| 1523 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1524 | dlog_verbose( |
| 1525 | "Invalid data access permissions %#x for " |
| 1526 | "donating memory.\n", |
| 1527 | permissions); |
| 1528 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1529 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1530 | } |
| 1531 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1532 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
| 1533 | security_state = |
| 1534 | ffa_get_memory_security_attr(memory_region->attributes); |
| 1535 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 1536 | dlog_verbose( |
| 1537 | "Invalid security state for memory share operation.\n"); |
| 1538 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1539 | } |
| 1540 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1541 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1542 | * If a memory donate or lend with single borrower, the memory type |
| 1543 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1544 | */ |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1545 | if (share_func == FFA_MEM_DONATE_32 || |
| 1546 | (share_func == FFA_MEM_LEND_32 && |
| 1547 | memory_region->receiver_count == 1)) { |
| 1548 | if (ffa_get_memory_type_attr(memory_region->attributes) != |
| 1549 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 1550 | dlog_verbose( |
| 1551 | "Memory type shall not be specified by " |
| 1552 | "sender.\n"); |
| 1553 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1554 | } |
| 1555 | } else { |
| 1556 | /* |
| 1557 | * Check that sender's memory attributes match Hafnium |
| 1558 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 1559 | * Read-Allocate Write-Allocate Cacheable. |
| 1560 | */ |
| 1561 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 1562 | if (ret.func != FFA_SUCCESS_32) { |
| 1563 | return ret; |
| 1564 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1565 | } |
| 1566 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1567 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1568 | } |
| 1569 | |
| 1570 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1571 | * Gets the share state for continuing an operation to donate, lend or share |
| 1572 | * memory, and checks that it is a valid request. |
| 1573 | * |
| 1574 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1575 | * not. |
| 1576 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1577 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1578 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
| 1579 | struct ffa_memory_share_state **share_state_ret, ffa_vm_id_t from_vm_id, |
| 1580 | struct mpool *page_pool) |
| 1581 | { |
| 1582 | struct ffa_memory_share_state *share_state; |
| 1583 | struct ffa_memory_region *memory_region; |
| 1584 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1585 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1586 | |
| 1587 | /* |
| 1588 | * Look up the share state by handle and make sure that the VM ID |
| 1589 | * matches. |
| 1590 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 1591 | share_state = get_share_state(share_states, handle); |
| 1592 | if (!share_state) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1593 | dlog_verbose( |
| 1594 | "Invalid handle %#x for memory send continuation.\n", |
| 1595 | handle); |
| 1596 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1597 | } |
| 1598 | memory_region = share_state->memory_region; |
| 1599 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1600 | if (vm_id_is_current_world(from_vm_id) && |
| 1601 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1602 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1603 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1604 | } |
| 1605 | |
| 1606 | if (share_state->sending_complete) { |
| 1607 | dlog_verbose( |
| 1608 | "Sending of memory handle %#x is already complete.\n", |
| 1609 | handle); |
| 1610 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1611 | } |
| 1612 | |
| 1613 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1614 | /* |
| 1615 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1616 | * probably be increased. |
| 1617 | */ |
| 1618 | dlog_warning( |
| 1619 | "Too many fragments for memory share with handle %#x; " |
| 1620 | "only %d supported.\n", |
| 1621 | handle, MAX_FRAGMENTS); |
| 1622 | /* Free share state, as it's not possible to complete it. */ |
| 1623 | share_state_free(share_states, share_state, page_pool); |
| 1624 | return ffa_error(FFA_NO_MEMORY); |
| 1625 | } |
| 1626 | |
| 1627 | *share_state_ret = share_state; |
| 1628 | |
| 1629 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1630 | } |
| 1631 | |
| 1632 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1633 | * Checks if there is at least one receiver from the other world. |
| 1634 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1635 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1636 | struct ffa_memory_region *memory_region) |
| 1637 | { |
| 1638 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 1639 | ffa_vm_id_t receiver = memory_region->receivers[i] |
| 1640 | .receiver_permissions.receiver; |
| 1641 | if (!vm_id_is_current_world(receiver)) { |
| 1642 | return true; |
| 1643 | } |
| 1644 | } |
| 1645 | return false; |
| 1646 | } |
| 1647 | |
| 1648 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 1649 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 1650 | * designated allocator of the memory handle. In practice, this also means |
| 1651 | * Hafnium is responsible for managing the state structures for the transaction. |
| 1652 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 1653 | * sender is an SP or there is at least one borrower that is an SP. |
| 1654 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 1655 | * operation involves only NWd VMs. |
| 1656 | * |
| 1657 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 1658 | * sender. Validation consists of checking if the message length and number of |
| 1659 | * memory region constituents match, and if the transition is valid for the |
| 1660 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1661 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1662 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1663 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1664 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1665 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1666 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1667 | * This function takes ownership of the `memory_region` passed in and will free |
| 1668 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1669 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1670 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1671 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1672 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1673 | uint32_t fragment_length, uint32_t share_func, |
| 1674 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1675 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1676 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1677 | struct share_states_locked share_states; |
| 1678 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1679 | |
| 1680 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1681 | * If there is an error validating the `memory_region` then we need to |
| 1682 | * free it because we own it but we won't be storing it in a share state |
| 1683 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1684 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1685 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1686 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1687 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1688 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1689 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1690 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1691 | } |
| 1692 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1693 | /* Set flag for share function, ready to be retrieved later. */ |
| 1694 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1695 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1696 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1697 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1698 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1699 | case FFA_MEM_LEND_32: |
| 1700 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1701 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1702 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1703 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1704 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1705 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1706 | } |
| 1707 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1708 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1709 | /* |
| 1710 | * Allocate a share state before updating the page table. Otherwise if |
| 1711 | * updating the page table succeeded but allocating the share state |
| 1712 | * failed then it would leave the memory in a state where nobody could |
| 1713 | * get it back. |
| 1714 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 1715 | share_state = allocate_share_state(share_states, share_func, |
| 1716 | memory_region, fragment_length, |
| 1717 | FFA_MEMORY_HANDLE_INVALID); |
| 1718 | if (!share_state) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1719 | dlog_verbose("Failed to allocate share state.\n"); |
| 1720 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1721 | ret = ffa_error(FFA_NO_MEMORY); |
| 1722 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1723 | } |
| 1724 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1725 | if (fragment_length == memory_share_length) { |
| 1726 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1727 | ret = ffa_memory_send_complete( |
| 1728 | from_locked, share_states, share_state, page_pool, |
| 1729 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1730 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1731 | /* |
| 1732 | * Use sender ID from 'memory_region' assuming |
| 1733 | * that at this point it has been validated: |
| 1734 | * - MBZ at virtual FF-A instance. |
| 1735 | */ |
| 1736 | ffa_vm_id_t sender_to_ret = |
| 1737 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 1738 | ? memory_region->sender |
| 1739 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1740 | ret = (struct ffa_value){ |
| 1741 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1742 | .arg1 = (uint32_t)memory_region->handle, |
| 1743 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1744 | .arg3 = fragment_length, |
| 1745 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1746 | } |
| 1747 | |
| 1748 | out: |
| 1749 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1750 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1751 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1755 | * Continues an operation to donate, lend or share memory to a VM from current |
| 1756 | * world. If this is the last fragment then checks that the transition is valid |
| 1757 | * for the type of memory sending operation and updates the stage-2 page tables |
| 1758 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1759 | * |
| 1760 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1761 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1762 | * allocated page from Hafnium's internal pool. |
| 1763 | * |
| 1764 | * This function takes ownership of the `fragment` passed in; it must not be |
| 1765 | * freed by the caller. |
| 1766 | */ |
| 1767 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 1768 | void *fragment, |
| 1769 | uint32_t fragment_length, |
| 1770 | ffa_memory_handle_t handle, |
| 1771 | struct mpool *page_pool) |
| 1772 | { |
| 1773 | struct share_states_locked share_states = share_states_lock(); |
| 1774 | struct ffa_memory_share_state *share_state; |
| 1775 | struct ffa_value ret; |
| 1776 | struct ffa_memory_region *memory_region; |
| 1777 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1778 | CHECK(is_aligned(fragment, |
| 1779 | alignof(struct ffa_memory_region_constituent))); |
| 1780 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 1781 | 0) { |
| 1782 | dlog_verbose("Fragment length %u misaligned.\n", |
| 1783 | fragment_length); |
| 1784 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1785 | goto out_free_fragment; |
| 1786 | } |
| 1787 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1788 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1789 | &share_state, |
| 1790 | from_locked.vm->id, page_pool); |
| 1791 | if (ret.func != FFA_SUCCESS_32) { |
| 1792 | goto out_free_fragment; |
| 1793 | } |
| 1794 | memory_region = share_state->memory_region; |
| 1795 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1796 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1797 | dlog_error( |
| 1798 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1799 | "other world. This should never happen, and indicates " |
| 1800 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1801 | "EL3 code.\n"); |
| 1802 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1803 | goto out_free_fragment; |
| 1804 | } |
| 1805 | |
| 1806 | /* Add this fragment. */ |
| 1807 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1808 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1809 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1810 | share_state->fragment_count++; |
| 1811 | |
| 1812 | /* Check whether the memory send operation is now ready to complete. */ |
| 1813 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1814 | ret = ffa_memory_send_complete( |
| 1815 | from_locked, share_states, share_state, page_pool, |
| 1816 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1817 | } else { |
| 1818 | ret = (struct ffa_value){ |
| 1819 | .func = FFA_MEM_FRAG_RX_32, |
| 1820 | .arg1 = (uint32_t)handle, |
| 1821 | .arg2 = (uint32_t)(handle >> 32), |
| 1822 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1823 | share_state)}; |
| 1824 | } |
| 1825 | goto out; |
| 1826 | |
| 1827 | out_free_fragment: |
| 1828 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1829 | |
| 1830 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1831 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1832 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1833 | } |
| 1834 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1835 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 1836 | static void ffa_memory_retrieve_complete( |
| 1837 | struct share_states_locked share_states, |
| 1838 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 1839 | { |
| 1840 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 1841 | /* |
| 1842 | * Memory that has been donated can't be relinquished, |
| 1843 | * so no need to keep the share state around. |
| 1844 | */ |
| 1845 | share_state_free(share_states, share_state, page_pool); |
| 1846 | dlog_verbose("Freed share state for donate.\n"); |
| 1847 | } |
| 1848 | } |
| 1849 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1850 | /** |
| 1851 | * Initialises the given memory region descriptor to be used for an |
| 1852 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 1853 | * fragment. |
| 1854 | * The memory region descriptor is initialized according to retriever's |
| 1855 | * FF-A version. |
| 1856 | * |
| 1857 | * Returns true on success, or false if the given constituents won't all fit in |
| 1858 | * the first fragment. |
| 1859 | */ |
| 1860 | static bool ffa_retrieved_memory_region_init( |
| 1861 | void *response, uint32_t ffa_version, size_t response_max_size, |
| 1862 | ffa_vm_id_t sender, ffa_memory_attributes_t attributes, |
| 1863 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
| 1864 | ffa_vm_id_t receiver_id, ffa_memory_access_permissions_t permissions, |
| 1865 | uint32_t page_count, uint32_t total_constituent_count, |
| 1866 | const struct ffa_memory_region_constituent constituents[], |
| 1867 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 1868 | uint32_t *fragment_length) |
| 1869 | { |
| 1870 | struct ffa_composite_memory_region *composite_memory_region; |
| 1871 | struct ffa_memory_access *receiver; |
| 1872 | uint32_t i; |
| 1873 | uint32_t constituents_offset; |
| 1874 | uint32_t receiver_count; |
| 1875 | |
| 1876 | assert(response != NULL); |
| 1877 | |
| 1878 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1879 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 1880 | (struct ffa_memory_region_v1_0 *)response; |
| 1881 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 1882 | ffa_memory_region_init_header_v1_0( |
| 1883 | retrieve_response, sender, attributes, flags, handle, 0, |
| 1884 | RECEIVERS_COUNT_IN_RETRIEVE_RESP); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1885 | |
| 1886 | receiver = &retrieve_response->receivers[0]; |
| 1887 | receiver_count = retrieve_response->receiver_count; |
| 1888 | |
| 1889 | receiver->composite_memory_region_offset = |
| 1890 | sizeof(struct ffa_memory_region_v1_0) + |
| 1891 | receiver_count * sizeof(struct ffa_memory_access); |
| 1892 | |
| 1893 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 1894 | retrieve_response, 0); |
| 1895 | } else { |
| 1896 | /* Default to FF-A v1.1 version. */ |
| 1897 | struct ffa_memory_region *retrieve_response = |
| 1898 | (struct ffa_memory_region *)response; |
| 1899 | |
| 1900 | ffa_memory_region_init_header(retrieve_response, sender, |
| 1901 | attributes, flags, handle, 0, 1); |
| 1902 | |
| 1903 | receiver = &retrieve_response->receivers[0]; |
| 1904 | receiver_count = retrieve_response->receiver_count; |
| 1905 | |
| 1906 | /* |
| 1907 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 1908 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 1909 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 1910 | * guaranteed that the offset we calculate here is aligned to a |
| 1911 | * 64-bit boundary and so 64-bit values can be copied without |
| 1912 | * alignment faults. |
| 1913 | */ |
| 1914 | receiver->composite_memory_region_offset = |
| 1915 | sizeof(struct ffa_memory_region) + |
| 1916 | receiver_count * sizeof(struct ffa_memory_access); |
| 1917 | |
| 1918 | composite_memory_region = |
| 1919 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 1920 | } |
| 1921 | |
| 1922 | assert(receiver != NULL); |
| 1923 | assert(composite_memory_region != NULL); |
| 1924 | |
| 1925 | /* |
| 1926 | * Initialized here as in memory retrieve responses we currently expect |
| 1927 | * one borrower to be specified. |
| 1928 | */ |
| 1929 | ffa_memory_access_init_permissions(receiver, receiver_id, 0, 0, flags); |
| 1930 | receiver->receiver_permissions.permissions = permissions; |
| 1931 | |
| 1932 | composite_memory_region->page_count = page_count; |
| 1933 | composite_memory_region->constituent_count = total_constituent_count; |
| 1934 | composite_memory_region->reserved_0 = 0; |
| 1935 | |
| 1936 | constituents_offset = receiver->composite_memory_region_offset + |
| 1937 | sizeof(struct ffa_composite_memory_region); |
| 1938 | if (constituents_offset + |
| 1939 | fragment_constituent_count * |
| 1940 | sizeof(struct ffa_memory_region_constituent) > |
| 1941 | response_max_size) { |
| 1942 | return false; |
| 1943 | } |
| 1944 | |
| 1945 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 1946 | composite_memory_region->constituents[i] = constituents[i]; |
| 1947 | } |
| 1948 | |
| 1949 | if (total_length != NULL) { |
| 1950 | *total_length = |
| 1951 | constituents_offset + |
| 1952 | composite_memory_region->constituent_count * |
| 1953 | sizeof(struct ffa_memory_region_constituent); |
| 1954 | } |
| 1955 | if (fragment_length != NULL) { |
| 1956 | *fragment_length = |
| 1957 | constituents_offset + |
| 1958 | fragment_constituent_count * |
| 1959 | sizeof(struct ffa_memory_region_constituent); |
| 1960 | } |
| 1961 | |
| 1962 | return true; |
| 1963 | } |
| 1964 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1965 | /* |
| 1966 | * Gets the receiver's access permissions from 'struct ffa_memory_region' and |
| 1967 | * returns its index in the receiver's array. If receiver's ID doesn't exist |
| 1968 | * in the array, return the region's 'receiver_count'. |
| 1969 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1970 | uint32_t ffa_memory_region_get_receiver(struct ffa_memory_region *memory_region, |
| 1971 | ffa_vm_id_t receiver) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1972 | { |
| 1973 | struct ffa_memory_access *receivers; |
| 1974 | uint32_t i; |
| 1975 | |
| 1976 | assert(memory_region != NULL); |
| 1977 | |
| 1978 | receivers = memory_region->receivers; |
| 1979 | |
| 1980 | for (i = 0U; i < memory_region->receiver_count; i++) { |
| 1981 | if (receivers[i].receiver_permissions.receiver == receiver) { |
| 1982 | break; |
| 1983 | } |
| 1984 | } |
| 1985 | |
| 1986 | return i; |
| 1987 | } |
| 1988 | |
| 1989 | /** |
| 1990 | * Validates the retrieved permissions against those specified by the lender |
| 1991 | * of memory share operation. Optionally can help set the permissions to be used |
| 1992 | * for the S2 mapping, through the `permissions` argument. |
| 1993 | * Returns true if permissions are valid, false otherwise. |
| 1994 | */ |
| 1995 | static bool ffa_memory_retrieve_is_memory_access_valid( |
| 1996 | enum ffa_data_access sent_data_access, |
| 1997 | enum ffa_data_access requested_data_access, |
| 1998 | enum ffa_instruction_access sent_instruction_access, |
| 1999 | enum ffa_instruction_access requested_instruction_access, |
| 2000 | ffa_memory_access_permissions_t *permissions) |
| 2001 | { |
| 2002 | switch (sent_data_access) { |
| 2003 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2004 | case FFA_DATA_ACCESS_RW: |
| 2005 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2006 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2007 | if (permissions != NULL) { |
| 2008 | ffa_set_data_access_attr(permissions, |
| 2009 | FFA_DATA_ACCESS_RW); |
| 2010 | } |
| 2011 | break; |
| 2012 | } |
| 2013 | /* Intentional fall-through. */ |
| 2014 | case FFA_DATA_ACCESS_RO: |
| 2015 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2016 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2017 | if (permissions != NULL) { |
| 2018 | ffa_set_data_access_attr(permissions, |
| 2019 | FFA_DATA_ACCESS_RO); |
| 2020 | } |
| 2021 | break; |
| 2022 | } |
| 2023 | dlog_verbose( |
| 2024 | "Invalid data access requested; sender specified " |
| 2025 | "permissions %#x but receiver requested %#x.\n", |
| 2026 | sent_data_access, requested_data_access); |
| 2027 | return false; |
| 2028 | case FFA_DATA_ACCESS_RESERVED: |
| 2029 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 2030 | "checked before this point."); |
| 2031 | } |
| 2032 | |
| 2033 | switch (sent_instruction_access) { |
| 2034 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2035 | case FFA_INSTRUCTION_ACCESS_X: |
| 2036 | if (requested_instruction_access == |
| 2037 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2038 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
| 2039 | if (permissions != NULL) { |
| 2040 | ffa_set_instruction_access_attr( |
| 2041 | permissions, FFA_INSTRUCTION_ACCESS_X); |
| 2042 | } |
| 2043 | break; |
| 2044 | } |
| 2045 | case FFA_INSTRUCTION_ACCESS_NX: |
| 2046 | if (requested_instruction_access == |
| 2047 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2048 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2049 | if (permissions != NULL) { |
| 2050 | ffa_set_instruction_access_attr( |
| 2051 | permissions, FFA_INSTRUCTION_ACCESS_NX); |
| 2052 | } |
| 2053 | break; |
| 2054 | } |
| 2055 | dlog_verbose( |
| 2056 | "Invalid instruction access requested; sender " |
| 2057 | "specified permissions %#x but receiver requested " |
| 2058 | "%#x.\n", |
| 2059 | sent_instruction_access, requested_instruction_access); |
| 2060 | return false; |
| 2061 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2062 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 2063 | "be checked before this point."); |
| 2064 | } |
| 2065 | |
| 2066 | return true; |
| 2067 | } |
| 2068 | |
| 2069 | /** |
| 2070 | * Validate the receivers' permissions in the retrieve request against those |
| 2071 | * specified by the lender. |
| 2072 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 2073 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
| 2074 | * Returns FFA_SUCCESS if all specified permissions are valid. |
| 2075 | */ |
| 2076 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 2077 | struct ffa_memory_region *memory_region, |
| 2078 | struct ffa_memory_region *retrieve_request, ffa_vm_id_t to_vm_id, |
| 2079 | ffa_memory_access_permissions_t *permissions) |
| 2080 | { |
| 2081 | uint32_t retrieve_receiver_index; |
| 2082 | |
| 2083 | assert(permissions != NULL); |
| 2084 | |
| 2085 | if (retrieve_request->receiver_count != memory_region->receiver_count) { |
| 2086 | dlog_verbose( |
| 2087 | "Retrieve request should contain same list of " |
| 2088 | "borrowers, as specified by the lender.\n"); |
| 2089 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2090 | } |
| 2091 | |
| 2092 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2093 | |
| 2094 | /* Should be populated with the permissions of the retriever. */ |
| 2095 | *permissions = 0; |
| 2096 | |
| 2097 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2098 | ffa_memory_access_permissions_t sent_permissions; |
| 2099 | struct ffa_memory_access *current_receiver = |
| 2100 | &retrieve_request->receivers[i]; |
| 2101 | ffa_memory_access_permissions_t requested_permissions = |
| 2102 | current_receiver->receiver_permissions.permissions; |
| 2103 | ffa_vm_id_t current_receiver_id = |
| 2104 | current_receiver->receiver_permissions.receiver; |
| 2105 | bool found_to_id = current_receiver_id == to_vm_id; |
| 2106 | |
| 2107 | /* |
| 2108 | * Find the current receiver in the transaction descriptor from |
| 2109 | * sender. |
| 2110 | */ |
| 2111 | uint32_t mem_region_receiver_index = |
| 2112 | ffa_memory_region_get_receiver(memory_region, |
| 2113 | current_receiver_id); |
| 2114 | |
| 2115 | if (mem_region_receiver_index == |
| 2116 | memory_region->receiver_count) { |
| 2117 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2118 | current_receiver_id); |
| 2119 | return ffa_error(FFA_DENIED); |
| 2120 | } |
| 2121 | |
| 2122 | sent_permissions = |
| 2123 | memory_region->receivers[mem_region_receiver_index] |
| 2124 | .receiver_permissions.permissions; |
| 2125 | |
| 2126 | if (found_to_id) { |
| 2127 | retrieve_receiver_index = i; |
| 2128 | } |
| 2129 | |
| 2130 | /* |
| 2131 | * Since we are traversing the list of receivers, save the index |
| 2132 | * of the caller. As it needs to be there. |
| 2133 | */ |
| 2134 | |
| 2135 | if (current_receiver->composite_memory_region_offset != 0U) { |
| 2136 | dlog_verbose( |
| 2137 | "Retriever specified address ranges not " |
| 2138 | "supported (got offset %d).\n", |
| 2139 | current_receiver |
| 2140 | ->composite_memory_region_offset); |
| 2141 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2142 | } |
| 2143 | |
| 2144 | /* |
| 2145 | * Check permissions from sender against permissions requested |
| 2146 | * by receiver. |
| 2147 | */ |
| 2148 | if (!ffa_memory_retrieve_is_memory_access_valid( |
| 2149 | ffa_get_data_access_attr(sent_permissions), |
| 2150 | ffa_get_data_access_attr(requested_permissions), |
| 2151 | ffa_get_instruction_access_attr(sent_permissions), |
| 2152 | ffa_get_instruction_access_attr( |
| 2153 | requested_permissions), |
| 2154 | found_to_id ? permissions : NULL)) { |
| 2155 | return ffa_error(FFA_DENIED); |
| 2156 | } |
| 2157 | |
| 2158 | /* |
| 2159 | * Can't request PM to clear memory if only provided with RO |
| 2160 | * permissions. |
| 2161 | */ |
| 2162 | if (found_to_id && |
| 2163 | (ffa_get_data_access_attr(*permissions) == |
| 2164 | FFA_DATA_ACCESS_RO) && |
| 2165 | (retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2166 | 0U) { |
| 2167 | dlog_verbose( |
| 2168 | "Receiver has RO permissions can not request " |
| 2169 | "clear.\n"); |
| 2170 | return ffa_error(FFA_DENIED); |
| 2171 | } |
| 2172 | } |
| 2173 | |
| 2174 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2175 | dlog_verbose( |
| 2176 | "Retrieve request does not contain caller's (%x) " |
| 2177 | "permissions\n", |
| 2178 | to_vm_id); |
| 2179 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2180 | } |
| 2181 | |
| 2182 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2183 | } |
| 2184 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2185 | /* |
| 2186 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 2187 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 2188 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 2189 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 2190 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 2191 | * exception of the sender ID and handle. |
| 2192 | */ |
| 2193 | bool is_ffa_memory_retrieve_borrower_request(struct ffa_memory_region *request, |
| 2194 | struct vm_locked to_locked) |
| 2195 | { |
| 2196 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
| 2197 | request->attributes == 0U && request->flags == 0U && |
| 2198 | request->tag == 0U && request->receiver_count == 0U && |
| 2199 | plat_ffa_memory_handle_allocated_by_current_world( |
| 2200 | request->handle); |
| 2201 | } |
| 2202 | |
| 2203 | /* |
| 2204 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 2205 | */ |
| 2206 | static void ffa_memory_retrieve_complete_from_hyp( |
| 2207 | struct ffa_memory_share_state *share_state) |
| 2208 | { |
| 2209 | if (share_state->hypervisor_fragment_count == |
| 2210 | share_state->fragment_count) { |
| 2211 | share_state->hypervisor_fragment_count = 0; |
| 2212 | } |
| 2213 | } |
| 2214 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2215 | /** |
| 2216 | * Validate that the memory region descriptor provided by the borrower on |
| 2217 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 2218 | * memory sharing call. |
| 2219 | */ |
| 2220 | static struct ffa_value ffa_memory_retrieve_validate( |
| 2221 | ffa_vm_id_t receiver_id, struct ffa_memory_region *retrieve_request, |
| 2222 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 2223 | uint32_t share_func) |
| 2224 | { |
| 2225 | ffa_memory_region_flags_t transaction_type = |
| 2226 | retrieve_request->flags & |
| 2227 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2228 | enum ffa_memory_security security_state; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2229 | |
| 2230 | assert(retrieve_request != NULL); |
| 2231 | assert(memory_region != NULL); |
| 2232 | assert(receiver_index != NULL); |
| 2233 | assert(retrieve_request->sender == memory_region->sender); |
| 2234 | |
| 2235 | /* |
| 2236 | * Check that the transaction type expected by the receiver is |
| 2237 | * correct, if it has been specified. |
| 2238 | */ |
| 2239 | if (transaction_type != |
| 2240 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 2241 | transaction_type != (memory_region->flags & |
| 2242 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 2243 | dlog_verbose( |
| 2244 | "Incorrect transaction type %#x for " |
| 2245 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
| 2246 | transaction_type, |
| 2247 | memory_region->flags & |
| 2248 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 2249 | retrieve_request->handle); |
| 2250 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2251 | } |
| 2252 | |
| 2253 | if (retrieve_request->tag != memory_region->tag) { |
| 2254 | dlog_verbose( |
| 2255 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
| 2256 | "%d for handle %#x.\n", |
| 2257 | retrieve_request->tag, memory_region->tag, |
| 2258 | retrieve_request->handle); |
| 2259 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2260 | } |
| 2261 | |
| 2262 | *receiver_index = |
| 2263 | ffa_memory_region_get_receiver(memory_region, receiver_id); |
| 2264 | |
| 2265 | if (*receiver_index == memory_region->receiver_count) { |
| 2266 | dlog_verbose( |
| 2267 | "Incorrect receiver VM ID %d for " |
| 2268 | "FFA_MEM_RETRIEVE_REQ, for handle %#x.\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2269 | receiver_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2270 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2271 | } |
| 2272 | |
| 2273 | if ((retrieve_request->flags & |
| 2274 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 2275 | dlog_verbose( |
| 2276 | "Retriever specified 'address range alignment 'hint' " |
| 2277 | "not supported.\n"); |
| 2278 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2279 | } |
| 2280 | if ((retrieve_request->flags & |
| 2281 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 2282 | dlog_verbose( |
| 2283 | "Bits 8-5 must be zero in memory region's flags " |
| 2284 | "(address range alignment hint not supported).\n"); |
| 2285 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2286 | } |
| 2287 | |
| 2288 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 2289 | dlog_verbose( |
| 2290 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 2291 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2292 | } |
| 2293 | |
| 2294 | if (share_func == FFA_MEM_SHARE_32 && |
| 2295 | (retrieve_request->flags & |
| 2296 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2297 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 2298 | dlog_verbose( |
| 2299 | "Memory Share operation can't clean after relinquish " |
| 2300 | "memory region.\n"); |
| 2301 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2302 | } |
| 2303 | |
| 2304 | /* |
| 2305 | * If the borrower needs the memory to be cleared before mapping |
| 2306 | * to its address space, the sender should have set the flag |
| 2307 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 2308 | * FFA_DENIED. |
| 2309 | */ |
| 2310 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 2311 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 2312 | dlog_verbose( |
| 2313 | "Borrower needs memory cleared. Sender needs to set " |
| 2314 | "flag for clearing memory.\n"); |
| 2315 | return ffa_error(FFA_DENIED); |
| 2316 | } |
| 2317 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2318 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
| 2319 | security_state = |
| 2320 | ffa_get_memory_security_attr(retrieve_request->attributes); |
| 2321 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2322 | dlog_verbose( |
| 2323 | "Invalid security state for memory retrieve request " |
| 2324 | "operation.\n"); |
| 2325 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2326 | } |
| 2327 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2328 | /* |
| 2329 | * If memory type is not specified, bypass validation of memory |
| 2330 | * attributes in the retrieve request. The retriever is expecting to |
| 2331 | * obtain this information from the SPMC. |
| 2332 | */ |
| 2333 | if (ffa_get_memory_type_attr(retrieve_request->attributes) == |
| 2334 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 2335 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2336 | } |
| 2337 | |
| 2338 | /* |
| 2339 | * Ensure receiver's attributes are compatible with how |
| 2340 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 2341 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 2342 | */ |
| 2343 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 2344 | } |
| 2345 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2346 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 2347 | struct ffa_memory_region *retrieve_request, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2348 | uint32_t retrieve_request_length, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2349 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2350 | { |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2351 | uint32_t expected_retrieve_request_length = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2352 | sizeof(struct ffa_memory_region) + |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2353 | retrieve_request->receiver_count * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2354 | sizeof(struct ffa_memory_access); |
| 2355 | ffa_memory_handle_t handle = retrieve_request->handle; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2356 | struct ffa_memory_region *memory_region; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2357 | ffa_memory_access_permissions_t permissions = 0; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2358 | uint32_t memory_to_mode; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2359 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2360 | struct ffa_memory_share_state *share_state; |
| 2361 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2362 | struct ffa_composite_memory_region *composite; |
| 2363 | uint32_t total_length; |
| 2364 | uint32_t fragment_length; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2365 | ffa_vm_id_t receiver_id = to_locked.vm->id; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2366 | bool is_send_complete = false; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2367 | ffa_memory_attributes_t attributes; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2368 | |
| 2369 | dump_share_states(); |
| 2370 | |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2371 | if (retrieve_request_length != expected_retrieve_request_length) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2372 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2373 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2374 | "but was %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2375 | expected_retrieve_request_length, |
| 2376 | retrieve_request_length); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2377 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2378 | } |
| 2379 | |
| 2380 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 2381 | share_state = get_share_state(share_states, handle); |
| 2382 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2383 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2384 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2385 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2386 | goto out; |
| 2387 | } |
| 2388 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2389 | if (!share_state->sending_complete) { |
| 2390 | dlog_verbose( |
| 2391 | "Memory with handle %#x not fully sent, can't " |
| 2392 | "retrieve.\n", |
| 2393 | handle); |
| 2394 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2395 | goto out; |
| 2396 | } |
| 2397 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2398 | memory_region = share_state->memory_region; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2399 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2400 | CHECK(memory_region != NULL); |
| 2401 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2402 | if (retrieve_request->sender != memory_region->sender) { |
| 2403 | dlog_verbose( |
| 2404 | "Memory with handle %#x not fully sent, can't " |
| 2405 | "retrieve.\n", |
| 2406 | handle); |
| 2407 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2408 | goto out; |
| 2409 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2410 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2411 | if (!is_ffa_memory_retrieve_borrower_request(retrieve_request, |
| 2412 | to_locked)) { |
| 2413 | uint32_t receiver_index; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2414 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2415 | /* |
| 2416 | * The SPMC can only process retrieve requests to memory share |
| 2417 | * operations with one borrower from the other world. It can't |
| 2418 | * determine the ID of the NWd VM that invoked the retrieve |
| 2419 | * request interface call. It relies on the hypervisor to |
| 2420 | * validate the caller's ID against that provided in the |
| 2421 | * `receivers` list of the retrieve response. |
| 2422 | * In case there is only one borrower from the NWd in the |
| 2423 | * transaction descriptor, record that in the `receiver_id` for |
| 2424 | * later use, and validate in the retrieve request message. |
| 2425 | */ |
| 2426 | if (to_locked.vm->id == HF_HYPERVISOR_VM_ID) { |
| 2427 | uint32_t other_world_count = 0; |
| 2428 | |
| 2429 | for (uint32_t i = 0; i < memory_region->receiver_count; |
| 2430 | i++) { |
| 2431 | receiver_id = |
| 2432 | retrieve_request->receivers[0] |
| 2433 | .receiver_permissions.receiver; |
| 2434 | if (!vm_id_is_current_world(receiver_id)) { |
| 2435 | other_world_count++; |
| 2436 | } |
| 2437 | } |
| 2438 | if (other_world_count > 1) { |
| 2439 | dlog_verbose( |
| 2440 | "Support one receiver from the other " |
| 2441 | "world.\n"); |
| 2442 | return ffa_error(FFA_NOT_SUPPORTED); |
| 2443 | } |
| 2444 | } |
| 2445 | |
| 2446 | /* |
| 2447 | * Validate retrieve request, according to what was sent by the |
| 2448 | * sender. Function will output the `receiver_index` from the |
| 2449 | * provided memory region, and will output `permissions` from |
| 2450 | * the validated requested permissions. |
| 2451 | */ |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2452 | ret = ffa_memory_retrieve_validate( |
| 2453 | receiver_id, retrieve_request, memory_region, |
| 2454 | &receiver_index, share_state->share_func); |
| 2455 | if (ret.func != FFA_SUCCESS_32) { |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2456 | goto out; |
| 2457 | } |
| 2458 | |
| 2459 | if (share_state->retrieved_fragment_count[receiver_index] != |
| 2460 | 0U) { |
| 2461 | dlog_verbose( |
| 2462 | "Memory with handle %#x already retrieved.\n", |
| 2463 | handle); |
| 2464 | ret = ffa_error(FFA_DENIED); |
| 2465 | goto out; |
| 2466 | } |
| 2467 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2468 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 2469 | memory_region, retrieve_request, receiver_id, |
| 2470 | &permissions); |
J-Alves | 614d9f4 | 2022-06-28 14:03:10 +0100 | [diff] [blame] | 2471 | if (ret.func != FFA_SUCCESS_32) { |
| 2472 | goto out; |
| 2473 | } |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 2474 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2475 | memory_to_mode = ffa_memory_permissions_to_mode( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2476 | permissions, share_state->sender_orig_mode); |
J-Alves | 40e260e | 2022-09-22 17:52:43 +0100 | [diff] [blame] | 2477 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2478 | ret = ffa_retrieve_check_update( |
| 2479 | to_locked, memory_region->sender, |
| 2480 | share_state->fragments, |
| 2481 | share_state->fragment_constituent_counts, |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2482 | share_state->fragment_count, memory_to_mode, |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2483 | share_state->share_func, false, page_pool); |
| 2484 | |
| 2485 | if (ret.func != FFA_SUCCESS_32) { |
| 2486 | goto out; |
| 2487 | } |
| 2488 | |
| 2489 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 2490 | is_send_complete = |
| 2491 | share_state->retrieved_fragment_count[receiver_index] == |
| 2492 | share_state->fragment_count; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2493 | |
| 2494 | share_state->clear_after_relinquish = |
| 2495 | (retrieve_request->flags & |
| 2496 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH) != 0U; |
| 2497 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2498 | } else { |
| 2499 | if (share_state->hypervisor_fragment_count != 0U) { |
| 2500 | dlog_verbose( |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2501 | "Memory with handle %#x already retrieved by " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2502 | "the hypervisor.\n", |
| 2503 | handle); |
| 2504 | ret = ffa_error(FFA_DENIED); |
| 2505 | goto out; |
| 2506 | } |
| 2507 | |
| 2508 | share_state->hypervisor_fragment_count = 1; |
| 2509 | |
| 2510 | ffa_memory_retrieve_complete_from_hyp(share_state); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2511 | } |
| 2512 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2513 | /* VMs acquire the RX buffer from SPMC. */ |
| 2514 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2515 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2516 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2517 | * Copy response to RX buffer of caller and deliver the message. |
| 2518 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2519 | */ |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2520 | /* TODO: combine attributes from sender and request. */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2521 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2522 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2523 | * Constituents which we received in the first fragment should |
| 2524 | * always fit in the first fragment we are sending, because the |
| 2525 | * header is the same size in both cases and we have a fixed |
| 2526 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 2527 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2528 | */ |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2529 | |
| 2530 | /* |
| 2531 | * Set the security state in the memory retrieve response attributes |
| 2532 | * if specified by the target mode. |
| 2533 | */ |
| 2534 | attributes = plat_ffa_memory_security_mode( |
| 2535 | memory_region->attributes, share_state->sender_orig_mode); |
| 2536 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2537 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2538 | to_locked.vm->mailbox.recv, to_locked.vm->ffa_version, |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2539 | HF_MAILBOX_SIZE, memory_region->sender, attributes, |
| 2540 | memory_region->flags, handle, receiver_id, permissions, |
| 2541 | composite->page_count, composite->constituent_count, |
| 2542 | share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2543 | share_state->fragment_constituent_counts[0], &total_length, |
| 2544 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2545 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2546 | to_locked.vm->mailbox.recv_size = fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2547 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2548 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2549 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2550 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2551 | if (is_send_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2552 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2553 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2554 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2555 | ret = (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2556 | .arg1 = total_length, |
| 2557 | .arg2 = fragment_length}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2558 | out: |
| 2559 | share_states_unlock(&share_states); |
| 2560 | dump_share_states(); |
| 2561 | return ret; |
| 2562 | } |
| 2563 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2564 | /** |
| 2565 | * Determine expected fragment offset according to the FF-A version of |
| 2566 | * the caller. |
| 2567 | */ |
| 2568 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2569 | struct ffa_memory_region *memory_region, |
| 2570 | uint32_t retrieved_constituents_count, uint32_t ffa_version) |
| 2571 | { |
| 2572 | uint32_t expected_fragment_offset; |
| 2573 | uint32_t composite_constituents_offset; |
| 2574 | |
| 2575 | if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 2576 | /* |
| 2577 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 2578 | * can retrieve the constituents offset from descriptor. |
| 2579 | */ |
| 2580 | composite_constituents_offset = |
| 2581 | ffa_composite_constituent_offset(memory_region, 0); |
| 2582 | } else if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 2583 | /* |
| 2584 | * If retriever is FF-A v1.0, determine the composite offset |
| 2585 | * as it is expected to have been configured in the |
| 2586 | * retrieve response. |
| 2587 | */ |
| 2588 | composite_constituents_offset = |
| 2589 | sizeof(struct ffa_memory_region_v1_0) + |
| 2590 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
| 2591 | sizeof(struct ffa_memory_access) + |
| 2592 | sizeof(struct ffa_composite_memory_region); |
| 2593 | } else { |
| 2594 | panic("%s received an invalid FF-A version.\n", __func__); |
| 2595 | } |
| 2596 | |
| 2597 | expected_fragment_offset = |
| 2598 | composite_constituents_offset + |
| 2599 | retrieved_constituents_count * |
| 2600 | sizeof(struct ffa_memory_region_constituent) - |
| 2601 | sizeof(struct ffa_memory_access) * |
| 2602 | (memory_region->receiver_count - 1); |
| 2603 | |
| 2604 | return expected_fragment_offset; |
| 2605 | } |
| 2606 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2607 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 2608 | ffa_memory_handle_t handle, |
| 2609 | uint32_t fragment_offset, |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2610 | ffa_vm_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2611 | struct mpool *page_pool) |
| 2612 | { |
| 2613 | struct ffa_memory_region *memory_region; |
| 2614 | struct share_states_locked share_states; |
| 2615 | struct ffa_memory_share_state *share_state; |
| 2616 | struct ffa_value ret; |
| 2617 | uint32_t fragment_index; |
| 2618 | uint32_t retrieved_constituents_count; |
| 2619 | uint32_t i; |
| 2620 | uint32_t expected_fragment_offset; |
| 2621 | uint32_t remaining_constituent_count; |
| 2622 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2623 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2624 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2625 | |
| 2626 | dump_share_states(); |
| 2627 | |
| 2628 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 2629 | share_state = get_share_state(share_states, handle); |
| 2630 | if (!share_state) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2631 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 2632 | handle); |
| 2633 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2634 | goto out; |
| 2635 | } |
| 2636 | |
| 2637 | memory_region = share_state->memory_region; |
| 2638 | CHECK(memory_region != NULL); |
| 2639 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2640 | if (!share_state->sending_complete) { |
| 2641 | dlog_verbose( |
| 2642 | "Memory with handle %#x not fully sent, can't " |
| 2643 | "retrieve.\n", |
| 2644 | handle); |
| 2645 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2646 | goto out; |
| 2647 | } |
| 2648 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2649 | /* |
| 2650 | * If retrieve request from the hypervisor has been initiated in the |
| 2651 | * given share_state, continue it, else assume it is a continuation of |
| 2652 | * retrieve request from a NWd VM. |
| 2653 | */ |
| 2654 | continue_ffa_hyp_mem_retrieve_req = |
| 2655 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 2656 | (share_state->hypervisor_fragment_count != 0U) && |
| 2657 | plat_ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2658 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2659 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2660 | receiver_index = ffa_memory_region_get_receiver( |
| 2661 | memory_region, to_locked.vm->id); |
| 2662 | |
| 2663 | if (receiver_index == memory_region->receiver_count) { |
| 2664 | dlog_verbose( |
| 2665 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
| 2666 | "borrower to memory sharing transaction (%x)\n", |
| 2667 | to_locked.vm->id, handle); |
| 2668 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2669 | goto out; |
| 2670 | } |
| 2671 | |
| 2672 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2673 | 0 || |
| 2674 | share_state->retrieved_fragment_count[receiver_index] >= |
| 2675 | share_state->fragment_count) { |
| 2676 | dlog_verbose( |
| 2677 | "Retrieval of memory with handle %#x not yet " |
| 2678 | "started or already completed (%d/%d fragments " |
| 2679 | "retrieved).\n", |
| 2680 | handle, |
| 2681 | share_state->retrieved_fragment_count |
| 2682 | [receiver_index], |
| 2683 | share_state->fragment_count); |
| 2684 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2685 | goto out; |
| 2686 | } |
| 2687 | |
| 2688 | fragment_index = |
| 2689 | share_state->retrieved_fragment_count[receiver_index]; |
| 2690 | } else { |
| 2691 | if (share_state->hypervisor_fragment_count == 0 || |
| 2692 | share_state->hypervisor_fragment_count >= |
| 2693 | share_state->fragment_count) { |
| 2694 | dlog_verbose( |
| 2695 | "Retrieve of memory with handle %x not " |
| 2696 | "started from hypervisor.\n", |
| 2697 | handle); |
| 2698 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2699 | goto out; |
| 2700 | } |
| 2701 | |
| 2702 | if (memory_region->sender != sender_vm_id) { |
| 2703 | dlog_verbose( |
| 2704 | "Sender ID (%x) is not as expected for memory " |
| 2705 | "handle %x\n", |
| 2706 | sender_vm_id, handle); |
| 2707 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2708 | goto out; |
| 2709 | } |
| 2710 | |
| 2711 | fragment_index = share_state->hypervisor_fragment_count; |
| 2712 | |
| 2713 | receiver_index = 0; |
| 2714 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2715 | |
| 2716 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2717 | * Check that the given fragment offset is correct by counting |
| 2718 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2719 | */ |
| 2720 | retrieved_constituents_count = 0; |
| 2721 | for (i = 0; i < fragment_index; ++i) { |
| 2722 | retrieved_constituents_count += |
| 2723 | share_state->fragment_constituent_counts[i]; |
| 2724 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2725 | |
| 2726 | CHECK(memory_region->receiver_count > 0); |
| 2727 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2728 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2729 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2730 | memory_region, retrieved_constituents_count, |
| 2731 | to_locked.vm->ffa_version); |
| 2732 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2733 | if (fragment_offset != expected_fragment_offset) { |
| 2734 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 2735 | fragment_offset, expected_fragment_offset); |
| 2736 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2737 | goto out; |
| 2738 | } |
| 2739 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2740 | /* VMs acquire the RX buffer from SPMC. */ |
| 2741 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2742 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2743 | remaining_constituent_count = ffa_memory_fragment_init( |
| 2744 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2745 | share_state->fragments[fragment_index], |
| 2746 | share_state->fragment_constituent_counts[fragment_index], |
| 2747 | &fragment_length); |
| 2748 | CHECK(remaining_constituent_count == 0); |
| 2749 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 2750 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 2751 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2752 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2753 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2754 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2755 | share_state->retrieved_fragment_count[receiver_index]++; |
| 2756 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2757 | share_state->fragment_count) { |
| 2758 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2759 | page_pool); |
| 2760 | } |
| 2761 | } else { |
| 2762 | share_state->hypervisor_fragment_count++; |
| 2763 | |
| 2764 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 2765 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2766 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 2767 | .arg1 = (uint32_t)handle, |
| 2768 | .arg2 = (uint32_t)(handle >> 32), |
| 2769 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2770 | |
| 2771 | out: |
| 2772 | share_states_unlock(&share_states); |
| 2773 | dump_share_states(); |
| 2774 | return ret; |
| 2775 | } |
| 2776 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2777 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2778 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2779 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2780 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2781 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2782 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2783 | struct ffa_memory_share_state *share_state; |
| 2784 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2785 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2786 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2787 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2788 | bool receivers_relinquished_memory; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2789 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2790 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2791 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2792 | "Stream endpoints not supported (got %d " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2793 | "endpoints on FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2794 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2795 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2796 | } |
| 2797 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2798 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2799 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2800 | "VM ID %d in relinquish message doesn't match " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2801 | "calling VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2802 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2803 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2804 | } |
| 2805 | |
| 2806 | dump_share_states(); |
| 2807 | |
| 2808 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 2809 | share_state = get_share_state(share_states, handle); |
| 2810 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2811 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2812 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2813 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2814 | goto out; |
| 2815 | } |
| 2816 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2817 | if (!share_state->sending_complete) { |
| 2818 | dlog_verbose( |
| 2819 | "Memory with handle %#x not fully sent, can't " |
| 2820 | "relinquish.\n", |
| 2821 | handle); |
| 2822 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2823 | goto out; |
| 2824 | } |
| 2825 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2826 | memory_region = share_state->memory_region; |
| 2827 | CHECK(memory_region != NULL); |
| 2828 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2829 | receiver_index = ffa_memory_region_get_receiver(memory_region, |
| 2830 | from_locked.vm->id); |
| 2831 | |
| 2832 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2833 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2834 | "VM ID %d tried to relinquish memory region " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2835 | "with handle %#x and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2836 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2837 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2838 | goto out; |
| 2839 | } |
| 2840 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2841 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2842 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2843 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2844 | "Memory with handle %#x not yet fully " |
| 2845 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2846 | "receiver %x can't relinquish.\n", |
| 2847 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2848 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2849 | goto out; |
| 2850 | } |
| 2851 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2852 | /* |
| 2853 | * Either clear if requested in relinquish call, or in a retrieve |
| 2854 | * request from one of the borrowers. |
| 2855 | */ |
| 2856 | receivers_relinquished_memory = true; |
| 2857 | |
| 2858 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2859 | struct ffa_memory_access *receiver = |
| 2860 | &memory_region->receivers[i]; |
| 2861 | |
| 2862 | if (receiver->receiver_permissions.receiver == |
| 2863 | from_locked.vm->id) { |
| 2864 | continue; |
| 2865 | } |
| 2866 | |
| 2867 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 2868 | receivers_relinquished_memory = false; |
| 2869 | break; |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | clear = receivers_relinquished_memory && |
| 2874 | (share_state->clear_after_relinquish || |
| 2875 | (relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2876 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2877 | |
| 2878 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2879 | * Clear is not allowed for memory that was shared, as the |
| 2880 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2881 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2882 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2883 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2884 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2885 | goto out; |
| 2886 | } |
| 2887 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2888 | ret = ffa_relinquish_check_update( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2889 | from_locked, memory_region->sender, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2890 | share_state->fragment_constituent_counts, |
| 2891 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2892 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2893 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2894 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2895 | * Mark memory handle as not retrieved, so it can be |
| 2896 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2897 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2898 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2899 | } |
| 2900 | |
| 2901 | out: |
| 2902 | share_states_unlock(&share_states); |
| 2903 | dump_share_states(); |
| 2904 | return ret; |
| 2905 | } |
| 2906 | |
| 2907 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2908 | * Validates that the reclaim transition is allowed for the given |
| 2909 | * handle, updates the page table of the reclaiming VM, and frees the |
| 2910 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2911 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2912 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2913 | ffa_memory_handle_t handle, |
| 2914 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2915 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2916 | { |
| 2917 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2918 | struct ffa_memory_share_state *share_state; |
| 2919 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2920 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2921 | |
| 2922 | dump_share_states(); |
| 2923 | |
| 2924 | share_states = share_states_lock(); |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 2925 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 2926 | share_state = get_share_state(share_states, handle); |
| 2927 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2928 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2929 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2930 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2931 | goto out; |
| 2932 | } |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame^] | 2933 | memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2934 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2935 | CHECK(memory_region != NULL); |
| 2936 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2937 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 2938 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2939 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 2940 | "VM %#x attempted to reclaim memory handle %#x " |
| 2941 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2942 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2943 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2944 | goto out; |
| 2945 | } |
| 2946 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2947 | if (!share_state->sending_complete) { |
| 2948 | dlog_verbose( |
| 2949 | "Memory with handle %#x not fully sent, can't " |
| 2950 | "reclaim.\n", |
| 2951 | handle); |
| 2952 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2953 | goto out; |
| 2954 | } |
| 2955 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2956 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2957 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 2958 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2959 | "Tried to reclaim memory handle %#x " |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2960 | "that has not been relinquished by all " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2961 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2962 | handle, |
| 2963 | memory_region->receivers[i] |
| 2964 | .receiver_permissions.receiver); |
| 2965 | ret = ffa_error(FFA_DENIED); |
| 2966 | goto out; |
| 2967 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2968 | } |
| 2969 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2970 | ret = ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 2971 | to_locked, memory_region->sender, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2972 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2973 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2974 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2975 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2976 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2977 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2978 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2979 | } |
| 2980 | |
| 2981 | out: |
| 2982 | share_states_unlock(&share_states); |
| 2983 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2984 | } |