Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 The Hafnium Authors. |
| 3 | * |
Andrew Walbran | e959ec1 | 2020-06-17 15:01:09 +0100 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style |
| 5 | * license that can be found in the LICENSE file or at |
| 6 | * https://opensource.org/licenses/BSD-3-Clause. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 7 | */ |
| 8 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 9 | #include "hf/ffa_memory.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 10 | |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 11 | #include "hf/arch/mm.h" |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 12 | #include "hf/arch/other_world.h" |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 13 | #include "hf/arch/plat/ffa.h" |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 14 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 15 | #include "hf/addr.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 16 | #include "hf/api.h" |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 17 | #include "hf/assert.h" |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 18 | #include "hf/check.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 19 | #include "hf/dlog.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 20 | #include "hf/ffa.h" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 21 | #include "hf/ffa_internal.h" |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 22 | #include "hf/ffa_memory_internal.h" |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 23 | #include "hf/ffa_partition_manifest.h" |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 24 | #include "hf/mm.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 25 | #include "hf/mpool.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 26 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 27 | #include "hf/vm.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 28 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 29 | #include "vmapi/hf/ffa_v1_0.h" |
| 30 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 31 | #define RECEIVERS_COUNT_IN_RETRIEVE_RESP 1 |
| 32 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 33 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 34 | * 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] | 35 | * by this lock. |
| 36 | */ |
| 37 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 38 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 39 | |
| 40 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 41 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 42 | */ |
| 43 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 44 | { |
| 45 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 46 | } |
| 47 | |
| 48 | /** |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 49 | * Initialises the next available `struct ffa_memory_share_state`. If `handle` |
| 50 | * is `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, |
| 51 | * otherwise uses the provided handle which is assumed to be globally unique. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 52 | * |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 53 | * Returns a pointer to the allocated `ffa_memory_share_state` on success or |
| 54 | * `NULL` if none are available. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 55 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 56 | struct ffa_memory_share_state *allocate_share_state( |
| 57 | struct share_states_locked share_states, uint32_t share_func, |
| 58 | struct ffa_memory_region *memory_region, uint32_t fragment_length, |
| 59 | ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 60 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 61 | assert(share_states.share_states != NULL); |
| 62 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 63 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 64 | for (uint64_t i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 65 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 66 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 67 | &share_states.share_states[i]; |
| 68 | struct ffa_composite_memory_region *composite = |
| 69 | ffa_memory_region_get_composite(memory_region, |
| 70 | 0); |
| 71 | |
| 72 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 73 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 74 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 75 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 76 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 77 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 78 | allocated_state->share_func = share_func; |
| 79 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 80 | allocated_state->fragment_count = 1; |
| 81 | allocated_state->fragments[0] = composite->constituents; |
| 82 | allocated_state->fragment_constituent_counts[0] = |
| 83 | (fragment_length - |
| 84 | ffa_composite_constituent_offset(memory_region, |
| 85 | 0)) / |
| 86 | sizeof(struct ffa_memory_region_constituent); |
| 87 | allocated_state->sending_complete = false; |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 88 | for (uint32_t j = 0; j < MAX_MEM_SHARE_RECIPIENTS; |
| 89 | ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 90 | allocated_state->retrieved_fragment_count[j] = |
| 91 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 92 | } |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 93 | return allocated_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 94 | } |
| 95 | } |
| 96 | |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 97 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /** Locks the share states lock. */ |
| 101 | struct share_states_locked share_states_lock(void) |
| 102 | { |
| 103 | sl_lock(&share_states_lock_instance); |
| 104 | |
| 105 | return (struct share_states_locked){.share_states = share_states}; |
| 106 | } |
| 107 | |
| 108 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 109 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 110 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 111 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 112 | share_states->share_states = NULL; |
| 113 | sl_unlock(&share_states_lock_instance); |
| 114 | } |
| 115 | |
| 116 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 117 | * 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] | 118 | * returns a pointer to the share state. Otherwise returns NULL. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 119 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 120 | struct ffa_memory_share_state *get_share_state( |
| 121 | struct share_states_locked share_states, ffa_memory_handle_t handle) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 122 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 123 | struct ffa_memory_share_state *share_state; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 124 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 125 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 126 | |
| 127 | /* |
| 128 | * First look for a share_state allocated by us, in which case the |
| 129 | * handle is based on the index. |
| 130 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 131 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 132 | uint64_t index = ffa_memory_handle_get_index(handle); |
| 133 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 134 | if (index < MAX_MEM_SHARES) { |
| 135 | share_state = &share_states.share_states[index]; |
| 136 | if (share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 137 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 138 | } |
| 139 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 140 | } |
| 141 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 142 | /* Fall back to a linear scan. */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 143 | for (uint64_t index = 0; index < MAX_MEM_SHARES; ++index) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 144 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 145 | if (share_state->memory_region != NULL && |
| 146 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 147 | share_state->share_func != 0) { |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 148 | return share_state; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 149 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 150 | } |
| 151 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 152 | return NULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 156 | void share_state_free(struct share_states_locked share_states, |
| 157 | struct ffa_memory_share_state *share_state, |
| 158 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 159 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 160 | uint32_t i; |
| 161 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 162 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 163 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 164 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 165 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 166 | /* |
| 167 | * First fragment is part of the same page as the `memory_region`, so it |
| 168 | * doesn't need to be freed separately. |
| 169 | */ |
| 170 | share_state->fragments[0] = NULL; |
| 171 | share_state->fragment_constituent_counts[0] = 0; |
| 172 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 173 | mpool_free(page_pool, share_state->fragments[i]); |
| 174 | share_state->fragments[i] = NULL; |
| 175 | share_state->fragment_constituent_counts[i] = 0; |
| 176 | } |
| 177 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 178 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 179 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 180 | } |
| 181 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 182 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 183 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 184 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 185 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 186 | struct ffa_composite_memory_region *composite; |
| 187 | uint32_t expected_constituent_count; |
| 188 | uint32_t fragment_constituent_count_total = 0; |
| 189 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 190 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 191 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 192 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 193 | |
| 194 | /* |
| 195 | * Share state must already be valid, or it's not possible to get hold |
| 196 | * of it. |
| 197 | */ |
| 198 | CHECK(share_state->memory_region != NULL && |
| 199 | share_state->share_func != 0); |
| 200 | |
| 201 | composite = |
| 202 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 203 | expected_constituent_count = composite->constituent_count; |
| 204 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 205 | fragment_constituent_count_total += |
| 206 | share_state->fragment_constituent_counts[i]; |
| 207 | } |
| 208 | dlog_verbose( |
| 209 | "Checking completion: constituent count %d/%d from %d " |
| 210 | "fragments.\n", |
| 211 | fragment_constituent_count_total, expected_constituent_count, |
| 212 | share_state->fragment_count); |
| 213 | |
| 214 | return fragment_constituent_count_total == expected_constituent_count; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Calculates the offset of the next fragment expected for the given share |
| 219 | * state. |
| 220 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 221 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 222 | struct share_states_locked share_states, |
| 223 | struct ffa_memory_share_state *share_state) |
| 224 | { |
| 225 | uint32_t next_fragment_offset; |
| 226 | uint32_t i; |
| 227 | |
| 228 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 229 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 230 | |
| 231 | next_fragment_offset = |
| 232 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 233 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 234 | next_fragment_offset += |
| 235 | share_state->fragment_constituent_counts[i] * |
| 236 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 237 | } |
| 238 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 239 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 240 | } |
| 241 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 242 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 243 | { |
| 244 | uint32_t i; |
| 245 | |
| 246 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 247 | return; |
| 248 | } |
| 249 | |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 250 | dlog("from VM %#x, attributes %#x, flags %#x, tag %u, to " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 251 | "%u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 252 | "recipients [", |
| 253 | memory_region->sender, memory_region->attributes, |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 254 | memory_region->flags, memory_region->tag, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 255 | memory_region->receiver_count); |
| 256 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 257 | if (i != 0) { |
| 258 | dlog(", "); |
| 259 | } |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 260 | dlog("VM %#x: %#x (offset %u)", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 261 | memory_region->receivers[i].receiver_permissions.receiver, |
| 262 | memory_region->receivers[i] |
| 263 | .receiver_permissions.permissions, |
| 264 | memory_region->receivers[i] |
| 265 | .composite_memory_region_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 266 | } |
| 267 | dlog("]"); |
| 268 | } |
| 269 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 270 | void dump_share_states(void) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 271 | { |
| 272 | uint32_t i; |
| 273 | |
| 274 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 275 | return; |
| 276 | } |
| 277 | |
| 278 | dlog("Current share states:\n"); |
| 279 | sl_lock(&share_states_lock_instance); |
| 280 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 281 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 282 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 283 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 284 | dlog("SHARE"); |
| 285 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 286 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 287 | dlog("LEND"); |
| 288 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 289 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 290 | dlog("DONATE"); |
| 291 | break; |
| 292 | default: |
| 293 | dlog("invalid share_func %#x", |
| 294 | share_states[i].share_func); |
| 295 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 296 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 297 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 298 | if (share_states[i].sending_complete) { |
| 299 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 300 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 301 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 302 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 303 | dlog(" with %d fragments, %d retrieved, " |
| 304 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 305 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 306 | share_states[i].retrieved_fragment_count[0], |
| 307 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 308 | } |
| 309 | } |
| 310 | sl_unlock(&share_states_lock_instance); |
| 311 | } |
| 312 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 313 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 314 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 315 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 316 | { |
| 317 | uint32_t mode = 0; |
| 318 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 319 | switch (ffa_get_data_access_attr(permissions)) { |
| 320 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 321 | mode = MM_MODE_R; |
| 322 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 323 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 324 | mode = MM_MODE_R | MM_MODE_W; |
| 325 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 326 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 327 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 328 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 329 | case FFA_DATA_ACCESS_RESERVED: |
| 330 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 331 | } |
| 332 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 333 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 334 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 335 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 336 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 337 | mode |= MM_MODE_X; |
| 338 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 339 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 340 | mode |= (default_mode & MM_MODE_X); |
| 341 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 342 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 343 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 344 | } |
| 345 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 346 | /* Set the security state bit if necessary. */ |
| 347 | if ((default_mode & plat_ffa_other_world_mode()) != 0) { |
| 348 | mode |= plat_ffa_other_world_mode(); |
| 349 | } |
| 350 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 351 | return mode; |
| 352 | } |
| 353 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 354 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 355 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 356 | * 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] | 357 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 358 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 359 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 360 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 361 | struct ffa_memory_region_constituent **fragments, |
| 362 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 363 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 364 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 365 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 366 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 367 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 368 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 369 | * Fail if there are no constituents. Otherwise we would get an |
| 370 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 371 | */ |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 372 | dlog_verbose("%s: no constituents\n", __func__); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 373 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 374 | } |
| 375 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 376 | for (i = 0; i < fragment_count; ++i) { |
| 377 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 378 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 379 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 380 | ipaddr_t end = ipa_add(begin, size); |
| 381 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 382 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 383 | /* Fail if addresses are not page-aligned. */ |
| 384 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 385 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 386 | dlog_verbose("%s: addresses not page-aligned\n", |
| 387 | __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 388 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 389 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 390 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 391 | /* |
| 392 | * Ensure that this constituent memory range is all |
| 393 | * mapped with the same mode. |
| 394 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 395 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 396 | dlog_verbose( |
| 397 | "%s: constituent memory range %#x..%#x " |
| 398 | "not mapped with the same mode\n", |
| 399 | __func__, begin, end); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 400 | return ffa_error(FFA_DENIED); |
| 401 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 402 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 403 | /* |
| 404 | * Ensure that all constituents are mapped with the same |
| 405 | * mode. |
| 406 | */ |
| 407 | if (i == 0) { |
| 408 | *orig_mode = current_mode; |
| 409 | } else if (current_mode != *orig_mode) { |
| 410 | dlog_verbose( |
Karl Meakin | 5df422c | 2023-07-11 17:31:38 +0100 | [diff] [blame] | 411 | "%s: expected mode %#x but was %#x for " |
| 412 | "%d pages at %#x.\n", |
| 413 | __func__, *orig_mode, current_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 414 | fragments[i][j].page_count, |
| 415 | ipa_addr(begin)); |
| 416 | return ffa_error(FFA_DENIED); |
| 417 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 418 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 419 | } |
| 420 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 421 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | /** |
| 425 | * Verify that all pages have the same mode, that the starting mode |
| 426 | * constitutes a valid state and obtain the next mode to apply |
| 427 | * to the sending VM. |
| 428 | * |
| 429 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 430 | * 1) FFA_DENIED if a state transition was not found; |
| 431 | * 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] | 432 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 433 | * 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] | 434 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 435 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 436 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 437 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 438 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 439 | struct vm_locked from, uint32_t share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 440 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 441 | uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 442 | struct ffa_memory_region_constituent **fragments, |
| 443 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 444 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 445 | { |
| 446 | const uint32_t state_mask = |
| 447 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 448 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 449 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 450 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 451 | fragment_constituent_counts, |
| 452 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 453 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 454 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 455 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 456 | } |
| 457 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 458 | /* Ensure the address range is normal memory and not a device. */ |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 459 | if ((*orig_from_mode & MM_MODE_D) != 0U) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 460 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 461 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 462 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | /* |
| 466 | * Ensure the sender is the owner and has exclusive access to the |
| 467 | * memory. |
| 468 | */ |
| 469 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 470 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 471 | } |
| 472 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 473 | assert(receivers != NULL && receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 474 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 475 | for (uint32_t i = 0U; i < receivers_count; i++) { |
| 476 | ffa_memory_access_permissions_t permissions = |
| 477 | receivers[i].receiver_permissions.permissions; |
| 478 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 479 | permissions, *orig_from_mode); |
| 480 | |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 481 | /* |
| 482 | * The assumption is that at this point, the operation from |
| 483 | * SP to a receiver VM, should have returned an FFA_ERROR |
| 484 | * already. |
| 485 | */ |
| 486 | if (!ffa_is_vm_id(from.vm->id)) { |
| 487 | assert(!ffa_is_vm_id( |
| 488 | receivers[i].receiver_permissions.receiver)); |
| 489 | } |
| 490 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 491 | if ((*orig_from_mode & required_from_mode) != |
| 492 | required_from_mode) { |
| 493 | dlog_verbose( |
| 494 | "Sender tried to send memory with permissions " |
J-Alves | 788b449 | 2023-04-18 14:01:23 +0100 | [diff] [blame] | 495 | "which required mode %#x but only had %#x " |
| 496 | "itself.\n", |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 497 | required_from_mode, *orig_from_mode); |
| 498 | return ffa_error(FFA_DENIED); |
| 499 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | /* Find the appropriate new mode. */ |
| 503 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 504 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 505 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 506 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 507 | break; |
| 508 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 509 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 510 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 511 | break; |
| 512 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 513 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 514 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 515 | break; |
| 516 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 517 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 518 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 519 | } |
| 520 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 521 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 522 | } |
| 523 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 524 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 525 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 526 | struct ffa_memory_region_constituent **fragments, |
| 527 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 528 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 529 | { |
| 530 | const uint32_t state_mask = |
| 531 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 532 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 533 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 534 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 535 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 536 | fragment_constituent_counts, |
| 537 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 538 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 539 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | /* Ensure the address range is normal memory and not a device. */ |
| 543 | if (*orig_from_mode & MM_MODE_D) { |
| 544 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 545 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 546 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | /* |
| 550 | * Ensure the relinquishing VM is not the owner but has access to the |
| 551 | * memory. |
| 552 | */ |
| 553 | orig_from_state = *orig_from_mode & state_mask; |
| 554 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 555 | dlog_verbose( |
| 556 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 557 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 558 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 559 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /* Find the appropriate new mode. */ |
| 563 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 564 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 565 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Verify that all pages have the same mode, that the starting mode |
| 570 | * constitutes a valid state and obtain the next mode to apply |
| 571 | * to the retrieving VM. |
| 572 | * |
| 573 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 574 | * 1) FFA_DENIED if a state transition was not found; |
| 575 | * 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] | 576 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 577 | * 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] | 578 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 579 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 580 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 581 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 582 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 583 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 584 | struct ffa_memory_region_constituent **fragments, |
| 585 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 586 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 587 | { |
| 588 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 589 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 590 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 591 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 592 | fragment_constituent_counts, |
| 593 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 594 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 595 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 596 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 597 | } |
| 598 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 599 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 600 | /* |
| 601 | * If the original ffa memory send call has been processed |
| 602 | * successfully, it is expected the orig_to_mode would overlay |
| 603 | * with `state_mask`, as a result of the function |
| 604 | * `ffa_send_check_transition`. |
| 605 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 606 | if (vm_id_is_current_world(to.vm->id)) { |
| 607 | assert((orig_to_mode & |
| 608 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 609 | MM_MODE_SHARED)) != 0U); |
| 610 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 611 | } else { |
| 612 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 613 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 614 | * Ensure the retriever has the expected state. We don't care |
| 615 | * about the MM_MODE_SHARED bit; either with or without it set |
| 616 | * are both valid representations of the !O-NA state. |
| 617 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 618 | if (vm_id_is_current_world(to.vm->id) && |
| 619 | to.vm->id != HF_PRIMARY_VM_ID && |
| 620 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 621 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 622 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 623 | } |
| 624 | } |
| 625 | |
| 626 | /* Find the appropriate new mode. */ |
| 627 | *to_mode = memory_to_attributes; |
| 628 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 629 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 630 | *to_mode |= 0; |
| 631 | break; |
| 632 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 633 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 634 | *to_mode |= MM_MODE_UNOWNED; |
| 635 | break; |
| 636 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 637 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 638 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 639 | break; |
| 640 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 641 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 642 | *to_mode |= 0; |
| 643 | break; |
| 644 | |
| 645 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 646 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 647 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 648 | } |
| 649 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 650 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 651 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 652 | |
| 653 | /** |
| 654 | * Updates a VM's page table such that the given set of physical address ranges |
| 655 | * are mapped in the address space at the corresponding address ranges, in the |
| 656 | * mode provided. |
| 657 | * |
| 658 | * If commit is false, the page tables will be allocated from the mpool but no |
| 659 | * mappings will actually be updated. This function must always be called first |
| 660 | * with commit false to check that it will succeed before calling with commit |
| 661 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 662 | * series of changes atomically you can call them all with commit false before |
| 663 | * calling them all with commit true. |
| 664 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 665 | * vm_ptable_defrag should always be called after a series of page table |
| 666 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 667 | * |
| 668 | * Returns true on success, or false if the update failed and no changes were |
| 669 | * made to memory mappings. |
| 670 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 671 | bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 672 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 673 | struct ffa_memory_region_constituent **fragments, |
| 674 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 675 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 676 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 677 | uint32_t i; |
| 678 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 679 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 680 | if (vm_locked.vm->el0_partition) { |
| 681 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 682 | } |
| 683 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 684 | /* Iterate over the memory region constituents within each fragment. */ |
| 685 | for (i = 0; i < fragment_count; ++i) { |
| 686 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 687 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 688 | paddr_t pa_begin = |
| 689 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 690 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 691 | uint32_t pa_bits = |
| 692 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 693 | |
| 694 | /* |
| 695 | * Ensure the requested region falls into system's PA |
| 696 | * range. |
| 697 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 698 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 699 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 700 | dlog_error("Region is outside of PA Range\n"); |
| 701 | return false; |
| 702 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 703 | |
| 704 | if (commit) { |
| 705 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 706 | mode, ppool, NULL); |
| 707 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 708 | pa_end, mode, ppool)) { |
| 709 | return false; |
| 710 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 711 | } |
| 712 | } |
| 713 | |
| 714 | return true; |
| 715 | } |
| 716 | |
| 717 | /** |
| 718 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 719 | * flushed from the cache so the memory has been cleared across the system. |
| 720 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 721 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 722 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 723 | { |
| 724 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 725 | * 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] | 726 | * global mapping of the whole range. Such an approach will limit |
| 727 | * the changes to stage-1 tables and will allow only local |
| 728 | * invalidation. |
| 729 | */ |
| 730 | bool ret; |
| 731 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 732 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 733 | MM_MODE_W | (extra_mode_attributes & |
| 734 | plat_ffa_other_world_mode()), |
| 735 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 736 | size_t size = pa_difference(begin, end); |
| 737 | |
| 738 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 739 | goto fail; |
| 740 | } |
| 741 | |
| 742 | memset_s(ptr, size, 0, size); |
| 743 | arch_mm_flush_dcache(ptr, size); |
| 744 | mm_unmap(stage1_locked, begin, end, ppool); |
| 745 | |
| 746 | ret = true; |
| 747 | goto out; |
| 748 | |
| 749 | fail: |
| 750 | ret = false; |
| 751 | |
| 752 | out: |
| 753 | mm_unlock_stage1(&stage1_locked); |
| 754 | |
| 755 | return ret; |
| 756 | } |
| 757 | |
| 758 | /** |
| 759 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 760 | * flushed from the cache so the memory has been cleared across the system. |
| 761 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 762 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 763 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 764 | struct ffa_memory_region_constituent **fragments, |
| 765 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 766 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 767 | { |
| 768 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 769 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 770 | bool ret = false; |
| 771 | |
| 772 | /* |
| 773 | * Create a local pool so any freed memory can't be used by another |
| 774 | * thread. This is to ensure each constituent that is mapped can be |
| 775 | * unmapped again afterwards. |
| 776 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 777 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 778 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 779 | /* Iterate over the memory region constituents within each fragment. */ |
| 780 | for (i = 0; i < fragment_count; ++i) { |
| 781 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 782 | |
J-Alves | 8457f93 | 2023-10-11 16:41:45 +0100 | [diff] [blame] | 783 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 784 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 785 | paddr_t begin = |
| 786 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 787 | paddr_t end = pa_add(begin, size); |
| 788 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 789 | if (!clear_memory(begin, end, &local_page_pool, |
| 790 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 791 | /* |
| 792 | * api_clear_memory will defrag on failure, so |
| 793 | * no need to do it here. |
| 794 | */ |
| 795 | goto out; |
| 796 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 797 | } |
| 798 | } |
| 799 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 800 | ret = true; |
| 801 | |
| 802 | out: |
| 803 | mpool_fini(&local_page_pool); |
| 804 | return ret; |
| 805 | } |
| 806 | |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 807 | static bool is_memory_range_within(ipaddr_t begin, ipaddr_t end, |
| 808 | ipaddr_t in_begin, ipaddr_t in_end) |
| 809 | { |
| 810 | return (ipa_addr(begin) >= ipa_addr(in_begin) && |
| 811 | ipa_addr(begin) < ipa_addr(in_end)) || |
| 812 | (ipa_addr(end) <= ipa_addr(in_end) && |
| 813 | ipa_addr(end) > ipa_addr(in_begin)); |
| 814 | } |
| 815 | |
| 816 | /** |
| 817 | * Receives a memory range and looks for overlaps with the remainder |
| 818 | * constituents of the memory share/lend/donate operation. Assumes they are |
| 819 | * passed in order to avoid having to loop over all the elements at each call. |
| 820 | * The function only compares the received memory ranges with those that follow |
| 821 | * within the same fragment, and subsequent fragments from the same operation. |
| 822 | */ |
| 823 | static bool ffa_memory_check_overlap( |
| 824 | struct ffa_memory_region_constituent **fragments, |
| 825 | const uint32_t *fragment_constituent_counts, |
| 826 | const uint32_t fragment_count, const uint32_t current_fragment, |
| 827 | const uint32_t current_constituent) |
| 828 | { |
| 829 | uint32_t i = current_fragment; |
| 830 | uint32_t j = current_constituent; |
| 831 | ipaddr_t current_begin = ipa_init(fragments[i][j].address); |
| 832 | const uint32_t current_page_count = fragments[i][j].page_count; |
| 833 | size_t current_size = current_page_count * PAGE_SIZE; |
| 834 | ipaddr_t current_end = ipa_add(current_begin, current_size - 1); |
| 835 | |
| 836 | if (current_size == 0 || |
| 837 | current_size > UINT64_MAX - ipa_addr(current_begin)) { |
| 838 | dlog_verbose("Invalid page count. Addr: %x page_count: %x\n", |
| 839 | current_begin, current_page_count); |
| 840 | return false; |
| 841 | } |
| 842 | |
| 843 | for (; i < fragment_count; i++) { |
| 844 | j = (i == current_fragment) ? j + 1 : 0; |
| 845 | |
| 846 | for (; j < fragment_constituent_counts[i]; j++) { |
| 847 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 848 | const uint32_t page_count = fragments[i][j].page_count; |
| 849 | size_t size = page_count * PAGE_SIZE; |
| 850 | ipaddr_t end = ipa_add(begin, size - 1); |
| 851 | |
| 852 | if (size == 0 || size > UINT64_MAX - ipa_addr(begin)) { |
| 853 | dlog_verbose( |
| 854 | "Invalid page count. Addr: %x " |
| 855 | "page_count: %x\n", |
| 856 | begin, page_count); |
| 857 | return false; |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | * Check if current ranges is within begin and end, as |
| 862 | * well as the reverse. This should help optimize the |
| 863 | * loop, and reduce the number of iterations. |
| 864 | */ |
| 865 | if (is_memory_range_within(begin, end, current_begin, |
| 866 | current_end) || |
| 867 | is_memory_range_within(current_begin, current_end, |
| 868 | begin, end)) { |
| 869 | dlog_verbose( |
| 870 | "Overlapping memory ranges: %#x - %#x " |
| 871 | "with %#x - %#x\n", |
| 872 | ipa_addr(begin), ipa_addr(end), |
| 873 | ipa_addr(current_begin), |
| 874 | ipa_addr(current_end)); |
| 875 | return true; |
| 876 | } |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | return false; |
| 881 | } |
| 882 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 883 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 884 | * 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] | 885 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 886 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 887 | * |
| 888 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 889 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 890 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 891 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 892 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 893 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 894 | * 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] | 895 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 896 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 897 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 898 | struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 899 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 900 | struct ffa_memory_region_constituent **fragments, |
| 901 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 902 | uint32_t composite_total_page_count, uint32_t share_func, |
| 903 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 904 | struct mpool *page_pool, bool clear, uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 905 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 906 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 907 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 908 | uint32_t orig_from_mode; |
| 909 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 910 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 911 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 912 | uint32_t constituents_total_page_count = 0; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 913 | |
| 914 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 915 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 916 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 917 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 918 | for (i = 0; i < fragment_count; ++i) { |
| 919 | if (!is_aligned(fragments[i], 8)) { |
| 920 | dlog_verbose("Constituents not aligned.\n"); |
| 921 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 922 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 923 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 924 | constituents_total_page_count += |
| 925 | fragments[i][j].page_count; |
J-Alves | 5952d94 | 2022-12-22 16:03:00 +0000 | [diff] [blame] | 926 | if (ffa_memory_check_overlap( |
| 927 | fragments, fragment_constituent_counts, |
| 928 | fragment_count, i, j)) { |
| 929 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 930 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 931 | } |
| 932 | } |
| 933 | |
| 934 | if (constituents_total_page_count != composite_total_page_count) { |
| 935 | dlog_verbose( |
| 936 | "Composite page count differs from calculated page " |
| 937 | "count from constituents.\n"); |
| 938 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 942 | * Check if the state transition is lawful for the sender, ensure that |
| 943 | * all constituents of a memory region being shared are at the same |
| 944 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 945 | */ |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 946 | ret = ffa_send_check_transition(from_locked, share_func, receivers, |
| 947 | receivers_count, &orig_from_mode, |
| 948 | fragments, fragment_constituent_counts, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 949 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 950 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 951 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 952 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 953 | } |
| 954 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 955 | if (orig_from_mode_ret != NULL) { |
| 956 | *orig_from_mode_ret = orig_from_mode; |
| 957 | } |
| 958 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 959 | /* |
| 960 | * Create a local pool so any freed memory can't be used by another |
| 961 | * thread. This is to ensure the original mapping can be restored if the |
| 962 | * clear fails. |
| 963 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 964 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 965 | |
| 966 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 967 | * First reserve all required memory for the new page table entries |
| 968 | * without committing, to make sure the entire operation will succeed |
| 969 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 970 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 971 | if (!ffa_region_group_identity_map( |
| 972 | from_locked, fragments, fragment_constituent_counts, |
| 973 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 974 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 975 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 976 | goto out; |
| 977 | } |
| 978 | |
| 979 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 980 | * Update the mapping for the sender. This won't allocate because the |
| 981 | * transaction was already prepared above, but may free pages in the |
| 982 | * case that a whole block is being unmapped that was previously |
| 983 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 984 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 985 | CHECK(ffa_region_group_identity_map( |
| 986 | from_locked, fragments, fragment_constituent_counts, |
| 987 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 988 | |
| 989 | /* 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] | 990 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 991 | !ffa_clear_memory_constituents(orig_from_mode, fragments, |
| 992 | fragment_constituent_counts, |
| 993 | fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 994 | /* |
| 995 | * On failure, roll back by returning memory to the sender. This |
| 996 | * may allocate pages which were previously freed into |
| 997 | * `local_page_pool` by the call above, but will never allocate |
| 998 | * more pages than that so can never fail. |
| 999 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1000 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1001 | from_locked, fragments, fragment_constituent_counts, |
| 1002 | fragment_count, orig_from_mode, &local_page_pool, |
| 1003 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1004 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1005 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1006 | goto out; |
| 1007 | } |
| 1008 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1009 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1010 | |
| 1011 | out: |
| 1012 | mpool_fini(&local_page_pool); |
| 1013 | |
| 1014 | /* |
| 1015 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1016 | * error) or merging entries into blocks where possible (on success). |
| 1017 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1018 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1019 | |
| 1020 | return ret; |
| 1021 | } |
| 1022 | |
| 1023 | /** |
| 1024 | * Validates and maps memory shared from one VM to another. |
| 1025 | * |
| 1026 | * This function requires the calling context to hold the <to> lock. |
| 1027 | * |
| 1028 | * Returns: |
| 1029 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1030 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1031 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1032 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1033 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1034 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1035 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1036 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1037 | struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1038 | struct ffa_memory_region_constituent **fragments, |
| 1039 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1040 | uint32_t sender_orig_mode, uint32_t share_func, bool clear, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1041 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1042 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1043 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1044 | uint32_t to_mode; |
| 1045 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1046 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1047 | |
| 1048 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1049 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1050 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1051 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1052 | for (i = 0; i < fragment_count; ++i) { |
| 1053 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1054 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1055 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1056 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * Check if the state transition is lawful for the recipient, and ensure |
| 1061 | * that all constituents of the memory region being retrieved are at the |
| 1062 | * same state. |
| 1063 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1064 | ret = ffa_retrieve_check_transition( |
| 1065 | to_locked, share_func, fragments, fragment_constituent_counts, |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1066 | fragment_count, sender_orig_mode, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1067 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1068 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1069 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | /* |
| 1073 | * Create a local pool so any freed memory can't be used by another |
| 1074 | * thread. This is to ensure the original mapping can be restored if the |
| 1075 | * clear fails. |
| 1076 | */ |
| 1077 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1078 | |
| 1079 | /* |
| 1080 | * First reserve all required memory for the new page table entries in |
| 1081 | * the recipient page tables without committing, to make sure the entire |
| 1082 | * operation will succeed without exhausting the page pool. |
| 1083 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1084 | if (!ffa_region_group_identity_map( |
| 1085 | to_locked, fragments, fragment_constituent_counts, |
| 1086 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1087 | /* TODO: partial defrag of failed range. */ |
| 1088 | dlog_verbose( |
| 1089 | "Insufficient memory to update recipient page " |
| 1090 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1091 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1092 | goto out; |
| 1093 | } |
| 1094 | |
| 1095 | /* 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] | 1096 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1097 | !ffa_clear_memory_constituents(sender_orig_mode, fragments, |
| 1098 | fragment_constituent_counts, |
| 1099 | fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1100 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1101 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1102 | goto out; |
| 1103 | } |
| 1104 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1105 | /* |
| 1106 | * Complete the transfer by mapping the memory into the recipient. This |
| 1107 | * won't allocate because the transaction was already prepared above, so |
| 1108 | * it doesn't need to use the `local_page_pool`. |
| 1109 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1110 | CHECK(ffa_region_group_identity_map( |
| 1111 | to_locked, fragments, fragment_constituent_counts, |
| 1112 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1113 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1114 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1115 | |
| 1116 | out: |
| 1117 | mpool_fini(&local_page_pool); |
| 1118 | |
| 1119 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1120 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1121 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1122 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1123 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1124 | |
| 1125 | return ret; |
| 1126 | } |
| 1127 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1128 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1129 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1130 | struct ffa_memory_region_constituent **fragments, |
| 1131 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1132 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1133 | { |
| 1134 | uint32_t orig_from_mode; |
| 1135 | uint32_t from_mode; |
| 1136 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1137 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1138 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1139 | ret = ffa_relinquish_check_transition( |
| 1140 | from_locked, &orig_from_mode, fragments, |
| 1141 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1142 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1143 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1144 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | /* |
| 1148 | * Create a local pool so any freed memory can't be used by another |
| 1149 | * thread. This is to ensure the original mapping can be restored if the |
| 1150 | * clear fails. |
| 1151 | */ |
| 1152 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1153 | |
| 1154 | /* |
| 1155 | * First reserve all required memory for the new page table entries |
| 1156 | * without committing, to make sure the entire operation will succeed |
| 1157 | * without exhausting the page pool. |
| 1158 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1159 | if (!ffa_region_group_identity_map( |
| 1160 | from_locked, fragments, fragment_constituent_counts, |
| 1161 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1162 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1163 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1164 | goto out; |
| 1165 | } |
| 1166 | |
| 1167 | /* |
| 1168 | * Update the mapping for the sender. This won't allocate because the |
| 1169 | * transaction was already prepared above, but may free pages in the |
| 1170 | * case that a whole block is being unmapped that was previously |
| 1171 | * partially mapped. |
| 1172 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1173 | CHECK(ffa_region_group_identity_map( |
| 1174 | from_locked, fragments, fragment_constituent_counts, |
| 1175 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1176 | |
| 1177 | /* 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] | 1178 | if (clear && |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 1179 | !ffa_clear_memory_constituents(orig_from_mode, fragments, |
| 1180 | fragment_constituent_counts, |
| 1181 | fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1182 | /* |
| 1183 | * On failure, roll back by returning memory to the sender. This |
| 1184 | * may allocate pages which were previously freed into |
| 1185 | * `local_page_pool` by the call above, but will never allocate |
| 1186 | * more pages than that so can never fail. |
| 1187 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1188 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1189 | from_locked, fragments, fragment_constituent_counts, |
| 1190 | fragment_count, orig_from_mode, &local_page_pool, |
| 1191 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1192 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1193 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1194 | goto out; |
| 1195 | } |
| 1196 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1197 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1198 | |
| 1199 | out: |
| 1200 | mpool_fini(&local_page_pool); |
| 1201 | |
| 1202 | /* |
| 1203 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1204 | * error) or merging entries into blocks where possible (on success). |
| 1205 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1206 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1207 | |
| 1208 | return ret; |
| 1209 | } |
| 1210 | |
| 1211 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1212 | * Complete a memory sending operation by checking that it is valid, updating |
| 1213 | * the sender page table, and then either marking the share state as having |
| 1214 | * completed sending (on success) or freeing it (on failure). |
| 1215 | * |
| 1216 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1217 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1218 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1219 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1220 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1221 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1222 | { |
| 1223 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1224 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1225 | struct ffa_value ret; |
| 1226 | |
| 1227 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1228 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1229 | assert(memory_region != NULL); |
| 1230 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1231 | assert(composite != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1232 | |
| 1233 | /* Check that state is valid in sender page table and update. */ |
| 1234 | ret = ffa_send_check_update( |
| 1235 | from_locked, share_state->fragments, |
| 1236 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame] | 1237 | share_state->fragment_count, composite->page_count, |
| 1238 | share_state->share_func, memory_region->receivers, |
| 1239 | memory_region->receiver_count, page_pool, |
| 1240 | memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1241 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1242 | if (ret.func != FFA_SUCCESS_32) { |
| 1243 | /* |
| 1244 | * Free share state, it failed to send so it can't be retrieved. |
| 1245 | */ |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1246 | dlog_verbose("%s: failed to send check update: %s(%s)\n", |
| 1247 | __func__, ffa_func_name(ret.func), |
| 1248 | ffa_error_name(ffa_error_code(ret))); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1249 | share_state_free(share_states, share_state, page_pool); |
| 1250 | return ret; |
| 1251 | } |
| 1252 | |
| 1253 | share_state->sending_complete = true; |
Karl Meakin | 4cec5e8 | 2023-06-30 16:30:22 +0100 | [diff] [blame] | 1254 | dlog_verbose("%s: marked sending complete.\n", __func__); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1255 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1256 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1257 | } |
| 1258 | |
| 1259 | /** |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1260 | * Check that the memory attributes match Hafnium expectations: |
| 1261 | * Normal Memory, Inner shareable, Write-Back Read-Allocate |
| 1262 | * Write-Allocate Cacheable. |
| 1263 | */ |
| 1264 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1265 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1266 | { |
| 1267 | enum ffa_memory_type memory_type; |
| 1268 | enum ffa_memory_cacheability cacheability; |
| 1269 | enum ffa_memory_shareability shareability; |
| 1270 | |
| 1271 | memory_type = ffa_get_memory_type_attr(attributes); |
| 1272 | if (memory_type != FFA_MEMORY_NORMAL_MEM) { |
| 1273 | dlog_verbose("Invalid memory type %#x, expected %#x.\n", |
| 1274 | memory_type, FFA_MEMORY_NORMAL_MEM); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1275 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1276 | } |
| 1277 | |
| 1278 | cacheability = ffa_get_memory_cacheability_attr(attributes); |
| 1279 | if (cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1280 | dlog_verbose("Invalid cacheability %#x, expected %#x.\n", |
| 1281 | cacheability, FFA_MEMORY_CACHE_WRITE_BACK); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1282 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1283 | } |
| 1284 | |
| 1285 | shareability = ffa_get_memory_shareability_attr(attributes); |
| 1286 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
| 1287 | dlog_verbose("Invalid shareability %#x, expected #%x.\n", |
| 1288 | shareability, FFA_MEMORY_INNER_SHAREABLE); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1289 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1293 | } |
| 1294 | |
| 1295 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1296 | * Check that the given `memory_region` represents a valid memory send request |
| 1297 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1298 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1299 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1300 | * 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] | 1301 | * not. |
| 1302 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1303 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1304 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1305 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1306 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1307 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1308 | struct ffa_composite_memory_region *composite; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1309 | uint64_t receivers_end; |
| 1310 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1311 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1312 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1313 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1314 | enum ffa_data_access data_access; |
| 1315 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1316 | enum ffa_memory_security security_state; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1317 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1318 | const size_t minimum_first_fragment_length = |
| 1319 | (sizeof(struct ffa_memory_region) + |
| 1320 | sizeof(struct ffa_memory_access) + |
| 1321 | sizeof(struct ffa_composite_memory_region)); |
| 1322 | |
| 1323 | if (fragment_length < minimum_first_fragment_length) { |
| 1324 | dlog_verbose("Fragment length %u too short (min %u).\n", |
| 1325 | (size_t)fragment_length, |
| 1326 | minimum_first_fragment_length); |
| 1327 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1328 | } |
| 1329 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1330 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1331 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1332 | if (!is_aligned(fragment_length, |
| 1333 | sizeof(struct ffa_memory_region_constituent)) || |
| 1334 | !is_aligned(memory_share_length, |
| 1335 | sizeof(struct ffa_memory_region_constituent))) { |
| 1336 | dlog_verbose( |
| 1337 | "Fragment length %u or total length %u" |
| 1338 | " is not 16-byte aligned.\n", |
| 1339 | fragment_length, memory_share_length); |
| 1340 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1341 | } |
| 1342 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1343 | if (fragment_length > memory_share_length) { |
| 1344 | dlog_verbose( |
| 1345 | "Fragment length %u greater than total length %u.\n", |
| 1346 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1347 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1348 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1349 | |
J-Alves | 0b6653d | 2022-04-22 13:17:38 +0100 | [diff] [blame] | 1350 | assert(memory_region->receivers_offset == |
| 1351 | offsetof(struct ffa_memory_region, receivers)); |
| 1352 | assert(memory_region->memory_access_desc_size == |
| 1353 | sizeof(struct ffa_memory_access)); |
| 1354 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1355 | /* The sender must match the caller. */ |
| 1356 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1357 | vm_id_is_current_world(memory_region->sender)) || |
| 1358 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1359 | memory_region->sender != from_locked.vm->id)) { |
| 1360 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1361 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1362 | } |
| 1363 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1364 | if (memory_region->receiver_count <= 0) { |
| 1365 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1366 | return ffa_error(FFA_INVALID_PARAMETERS); |
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 | /* |
| 1370 | * Ensure that the composite header is within the memory bounds and |
| 1371 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 1372 | * to prevent overflow. |
| 1373 | */ |
| 1374 | receivers_end = ((uint64_t)sizeof(struct ffa_memory_access) * |
| 1375 | (uint64_t)memory_region->receiver_count) + |
| 1376 | sizeof(struct ffa_memory_region); |
| 1377 | min_length = receivers_end + |
| 1378 | sizeof(struct ffa_composite_memory_region) + |
| 1379 | sizeof(struct ffa_memory_region_constituent); |
| 1380 | if (min_length > memory_share_length) { |
| 1381 | dlog_verbose("Share too short: got %u but minimum is %u.\n", |
| 1382 | (size_t)memory_share_length, (size_t)min_length); |
| 1383 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1384 | } |
| 1385 | |
| 1386 | composite_memory_region_offset = |
| 1387 | memory_region->receivers[0].composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1388 | |
| 1389 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1390 | * Check that the composite memory region descriptor is after the access |
| 1391 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 1392 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1393 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1394 | if ((composite_memory_region_offset < receivers_end) || |
| 1395 | (composite_memory_region_offset % 16 != 0) || |
| 1396 | (composite_memory_region_offset > |
| 1397 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 1398 | dlog_verbose( |
| 1399 | "Invalid composite memory region descriptor offset " |
| 1400 | "%u.\n", |
| 1401 | (size_t)composite_memory_region_offset); |
| 1402 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1403 | } |
| 1404 | |
| 1405 | /* |
| 1406 | * Compute the start of the constituent regions. Already checked |
| 1407 | * to be not more than fragment_length and thus not more than |
| 1408 | * memory_share_length. |
| 1409 | */ |
| 1410 | constituents_start = composite_memory_region_offset + |
| 1411 | sizeof(struct ffa_composite_memory_region); |
| 1412 | constituents_length = memory_share_length - constituents_start; |
| 1413 | |
| 1414 | /* |
| 1415 | * Check that the number of constituents is consistent with the length |
| 1416 | * of the constituent region. |
| 1417 | */ |
| 1418 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1419 | if ((constituents_length % |
| 1420 | sizeof(struct ffa_memory_region_constituent) != |
| 1421 | 0) || |
| 1422 | ((constituents_length / |
| 1423 | sizeof(struct ffa_memory_region_constituent)) != |
| 1424 | composite->constituent_count)) { |
| 1425 | dlog_verbose("Invalid length %u or composite offset %u.\n", |
| 1426 | (size_t)memory_share_length, |
| 1427 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1428 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1429 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1430 | if (fragment_length < memory_share_length && |
| 1431 | fragment_length < HF_MAILBOX_SIZE) { |
| 1432 | dlog_warning( |
| 1433 | "Initial fragment length %d smaller than mailbox " |
| 1434 | "size.\n", |
| 1435 | fragment_length); |
| 1436 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1437 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1438 | /* |
| 1439 | * Clear is not allowed for memory sharing, as the sender still has |
| 1440 | * access to the memory. |
| 1441 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1442 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1443 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1444 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1445 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1446 | } |
| 1447 | |
| 1448 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1449 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1450 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1451 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1452 | } |
| 1453 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1454 | /* Check that the permissions are valid, for each specified receiver. */ |
| 1455 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
| 1456 | ffa_memory_access_permissions_t permissions = |
| 1457 | memory_region->receivers[i] |
| 1458 | .receiver_permissions.permissions; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1459 | ffa_id_t receiver_id = memory_region->receivers[i] |
| 1460 | .receiver_permissions.receiver; |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1461 | |
| 1462 | if (memory_region->sender == receiver_id) { |
| 1463 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1464 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1465 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 1466 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1467 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 1468 | j++) { |
| 1469 | if (receiver_id == |
| 1470 | memory_region->receivers[j] |
| 1471 | .receiver_permissions.receiver) { |
| 1472 | dlog_verbose( |
| 1473 | "Repeated receiver(%x) in memory send " |
| 1474 | "operation.\n", |
| 1475 | memory_region->receivers[j] |
| 1476 | .receiver_permissions.receiver); |
| 1477 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1478 | } |
| 1479 | } |
| 1480 | |
| 1481 | if (composite_memory_region_offset != |
| 1482 | memory_region->receivers[i] |
| 1483 | .composite_memory_region_offset) { |
| 1484 | dlog_verbose( |
| 1485 | "All ffa_memory_access should point to the " |
| 1486 | "same composite memory region offset.\n"); |
| 1487 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1488 | } |
| 1489 | |
| 1490 | data_access = ffa_get_data_access_attr(permissions); |
| 1491 | instruction_access = |
| 1492 | ffa_get_instruction_access_attr(permissions); |
| 1493 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1494 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 1495 | dlog_verbose( |
| 1496 | "Reserved value for receiver permissions " |
| 1497 | "%#x.\n", |
| 1498 | permissions); |
| 1499 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1500 | } |
| 1501 | if (instruction_access != |
| 1502 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 1503 | dlog_verbose( |
| 1504 | "Invalid instruction access permissions %#x " |
| 1505 | "for sending memory.\n", |
| 1506 | permissions); |
| 1507 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1508 | } |
| 1509 | if (share_func == FFA_MEM_SHARE_32) { |
| 1510 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1511 | dlog_verbose( |
| 1512 | "Invalid data access permissions %#x " |
| 1513 | "for sharing memory.\n", |
| 1514 | permissions); |
| 1515 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1516 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1517 | } |
| 1518 | if (share_func == FFA_MEM_LEND_32 && |
| 1519 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1520 | dlog_verbose( |
| 1521 | "Invalid data access permissions %#x for " |
| 1522 | "lending memory.\n", |
| 1523 | permissions); |
| 1524 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1525 | } |
| 1526 | |
| 1527 | if (share_func == FFA_MEM_DONATE_32 && |
| 1528 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1529 | dlog_verbose( |
| 1530 | "Invalid data access permissions %#x for " |
| 1531 | "donating memory.\n", |
| 1532 | permissions); |
| 1533 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1534 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1535 | } |
| 1536 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1537 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
| 1538 | security_state = |
| 1539 | ffa_get_memory_security_attr(memory_region->attributes); |
| 1540 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 1541 | dlog_verbose( |
| 1542 | "Invalid security state for memory share operation.\n"); |
| 1543 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1544 | } |
| 1545 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1546 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1547 | * If a memory donate or lend with single borrower, the memory type |
| 1548 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1549 | */ |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1550 | if (share_func == FFA_MEM_DONATE_32 || |
| 1551 | (share_func == FFA_MEM_LEND_32 && |
| 1552 | memory_region->receiver_count == 1)) { |
| 1553 | if (ffa_get_memory_type_attr(memory_region->attributes) != |
| 1554 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 1555 | dlog_verbose( |
| 1556 | "Memory type shall not be specified by " |
| 1557 | "sender.\n"); |
| 1558 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1559 | } |
| 1560 | } else { |
| 1561 | /* |
| 1562 | * Check that sender's memory attributes match Hafnium |
| 1563 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 1564 | * Read-Allocate Write-Allocate Cacheable. |
| 1565 | */ |
| 1566 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 1567 | if (ret.func != FFA_SUCCESS_32) { |
| 1568 | return ret; |
| 1569 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1570 | } |
| 1571 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1572 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1573 | } |
| 1574 | |
| 1575 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1576 | * Gets the share state for continuing an operation to donate, lend or share |
| 1577 | * memory, and checks that it is a valid request. |
| 1578 | * |
| 1579 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1580 | * not. |
| 1581 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1582 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1583 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1584 | struct ffa_memory_share_state **share_state_ret, ffa_id_t from_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1585 | struct mpool *page_pool) |
| 1586 | { |
| 1587 | struct ffa_memory_share_state *share_state; |
| 1588 | struct ffa_memory_region *memory_region; |
| 1589 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1590 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1591 | |
| 1592 | /* |
| 1593 | * Look up the share state by handle and make sure that the VM ID |
| 1594 | * matches. |
| 1595 | */ |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 1596 | share_state = get_share_state(share_states, handle); |
| 1597 | if (!share_state) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1598 | dlog_verbose( |
| 1599 | "Invalid handle %#x for memory send continuation.\n", |
| 1600 | handle); |
| 1601 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1602 | } |
| 1603 | memory_region = share_state->memory_region; |
| 1604 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1605 | if (vm_id_is_current_world(from_vm_id) && |
| 1606 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1607 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1608 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1609 | } |
| 1610 | |
| 1611 | if (share_state->sending_complete) { |
| 1612 | dlog_verbose( |
| 1613 | "Sending of memory handle %#x is already complete.\n", |
| 1614 | handle); |
| 1615 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1616 | } |
| 1617 | |
| 1618 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1619 | /* |
| 1620 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1621 | * probably be increased. |
| 1622 | */ |
| 1623 | dlog_warning( |
| 1624 | "Too many fragments for memory share with handle %#x; " |
| 1625 | "only %d supported.\n", |
| 1626 | handle, MAX_FRAGMENTS); |
| 1627 | /* Free share state, as it's not possible to complete it. */ |
| 1628 | share_state_free(share_states, share_state, page_pool); |
| 1629 | return ffa_error(FFA_NO_MEMORY); |
| 1630 | } |
| 1631 | |
| 1632 | *share_state_ret = share_state; |
| 1633 | |
| 1634 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1635 | } |
| 1636 | |
| 1637 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1638 | * Checks if there is at least one receiver from the other world. |
| 1639 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1640 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1641 | struct ffa_memory_region *memory_region) |
| 1642 | { |
| 1643 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1644 | ffa_id_t receiver = memory_region->receivers[i] |
| 1645 | .receiver_permissions.receiver; |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1646 | if (!vm_id_is_current_world(receiver)) { |
| 1647 | return true; |
| 1648 | } |
| 1649 | } |
| 1650 | return false; |
| 1651 | } |
| 1652 | |
| 1653 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 1654 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 1655 | * designated allocator of the memory handle. In practice, this also means |
| 1656 | * Hafnium is responsible for managing the state structures for the transaction. |
| 1657 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 1658 | * sender is an SP or there is at least one borrower that is an SP. |
| 1659 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 1660 | * operation involves only NWd VMs. |
| 1661 | * |
| 1662 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 1663 | * sender. Validation consists of checking if the message length and number of |
| 1664 | * memory region constituents match, and if the transition is valid for the |
| 1665 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1666 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1667 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1668 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1669 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1670 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1671 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1672 | * This function takes ownership of the `memory_region` passed in and will free |
| 1673 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1674 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1675 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1676 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1677 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1678 | uint32_t fragment_length, uint32_t share_func, |
| 1679 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1680 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1681 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1682 | struct share_states_locked share_states; |
| 1683 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1684 | |
| 1685 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1686 | * If there is an error validating the `memory_region` then we need to |
| 1687 | * free it because we own it but we won't be storing it in a share state |
| 1688 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1689 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1690 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1691 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1692 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1693 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1694 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1695 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1696 | } |
| 1697 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1698 | /* Set flag for share function, ready to be retrieved later. */ |
| 1699 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1700 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1701 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1702 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1703 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1704 | case FFA_MEM_LEND_32: |
| 1705 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1706 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1707 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1708 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1709 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1710 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1711 | } |
| 1712 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1713 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1714 | /* |
| 1715 | * Allocate a share state before updating the page table. Otherwise if |
| 1716 | * updating the page table succeeded but allocating the share state |
| 1717 | * failed then it would leave the memory in a state where nobody could |
| 1718 | * get it back. |
| 1719 | */ |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 1720 | share_state = allocate_share_state(share_states, share_func, |
| 1721 | memory_region, fragment_length, |
| 1722 | FFA_MEMORY_HANDLE_INVALID); |
| 1723 | if (!share_state) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1724 | dlog_verbose("Failed to allocate share state.\n"); |
| 1725 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1726 | ret = ffa_error(FFA_NO_MEMORY); |
| 1727 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1728 | } |
| 1729 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1730 | if (fragment_length == memory_share_length) { |
| 1731 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1732 | ret = ffa_memory_send_complete( |
| 1733 | from_locked, share_states, share_state, page_pool, |
| 1734 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1735 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1736 | /* |
| 1737 | * Use sender ID from 'memory_region' assuming |
| 1738 | * that at this point it has been validated: |
| 1739 | * - MBZ at virtual FF-A instance. |
| 1740 | */ |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1741 | ffa_id_t sender_to_ret = |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1742 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 1743 | ? memory_region->sender |
| 1744 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1745 | ret = (struct ffa_value){ |
| 1746 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1747 | .arg1 = (uint32_t)memory_region->handle, |
| 1748 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1749 | .arg3 = fragment_length, |
| 1750 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1751 | } |
| 1752 | |
| 1753 | out: |
| 1754 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1755 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1756 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1757 | } |
| 1758 | |
| 1759 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1760 | * Continues an operation to donate, lend or share memory to a VM from current |
| 1761 | * world. If this is the last fragment then checks that the transition is valid |
| 1762 | * for the type of memory sending operation and updates the stage-2 page tables |
| 1763 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1764 | * |
| 1765 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1766 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1767 | * allocated page from Hafnium's internal pool. |
| 1768 | * |
| 1769 | * This function takes ownership of the `fragment` passed in; it must not be |
| 1770 | * freed by the caller. |
| 1771 | */ |
| 1772 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 1773 | void *fragment, |
| 1774 | uint32_t fragment_length, |
| 1775 | ffa_memory_handle_t handle, |
| 1776 | struct mpool *page_pool) |
| 1777 | { |
| 1778 | struct share_states_locked share_states = share_states_lock(); |
| 1779 | struct ffa_memory_share_state *share_state; |
| 1780 | struct ffa_value ret; |
| 1781 | struct ffa_memory_region *memory_region; |
| 1782 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1783 | CHECK(is_aligned(fragment, |
| 1784 | alignof(struct ffa_memory_region_constituent))); |
| 1785 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 1786 | 0) { |
| 1787 | dlog_verbose("Fragment length %u misaligned.\n", |
| 1788 | fragment_length); |
| 1789 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1790 | goto out_free_fragment; |
| 1791 | } |
| 1792 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1793 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1794 | &share_state, |
| 1795 | from_locked.vm->id, page_pool); |
| 1796 | if (ret.func != FFA_SUCCESS_32) { |
| 1797 | goto out_free_fragment; |
| 1798 | } |
| 1799 | memory_region = share_state->memory_region; |
| 1800 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1801 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1802 | dlog_error( |
| 1803 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1804 | "other world. This should never happen, and indicates " |
| 1805 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1806 | "EL3 code.\n"); |
| 1807 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1808 | goto out_free_fragment; |
| 1809 | } |
| 1810 | |
| 1811 | /* Add this fragment. */ |
| 1812 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1813 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1814 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1815 | share_state->fragment_count++; |
| 1816 | |
| 1817 | /* Check whether the memory send operation is now ready to complete. */ |
| 1818 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1819 | ret = ffa_memory_send_complete( |
| 1820 | from_locked, share_states, share_state, page_pool, |
| 1821 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1822 | } else { |
| 1823 | ret = (struct ffa_value){ |
| 1824 | .func = FFA_MEM_FRAG_RX_32, |
| 1825 | .arg1 = (uint32_t)handle, |
| 1826 | .arg2 = (uint32_t)(handle >> 32), |
| 1827 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1828 | share_state)}; |
| 1829 | } |
| 1830 | goto out; |
| 1831 | |
| 1832 | out_free_fragment: |
| 1833 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1834 | |
| 1835 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1836 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1837 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1838 | } |
| 1839 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1840 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 1841 | static void ffa_memory_retrieve_complete( |
| 1842 | struct share_states_locked share_states, |
| 1843 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 1844 | { |
| 1845 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 1846 | /* |
| 1847 | * Memory that has been donated can't be relinquished, |
| 1848 | * so no need to keep the share state around. |
| 1849 | */ |
| 1850 | share_state_free(share_states, share_state, page_pool); |
| 1851 | dlog_verbose("Freed share state for donate.\n"); |
| 1852 | } |
| 1853 | } |
| 1854 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1855 | /** |
| 1856 | * Initialises the given memory region descriptor to be used for an |
| 1857 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 1858 | * fragment. |
| 1859 | * The memory region descriptor is initialized according to retriever's |
| 1860 | * FF-A version. |
| 1861 | * |
| 1862 | * Returns true on success, or false if the given constituents won't all fit in |
| 1863 | * the first fragment. |
| 1864 | */ |
| 1865 | static bool ffa_retrieved_memory_region_init( |
| 1866 | void *response, uint32_t ffa_version, size_t response_max_size, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1867 | ffa_id_t sender, ffa_memory_attributes_t attributes, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1868 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1869 | ffa_id_t receiver_id, ffa_memory_access_permissions_t permissions, |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1870 | uint32_t page_count, uint32_t total_constituent_count, |
| 1871 | const struct ffa_memory_region_constituent constituents[], |
| 1872 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 1873 | uint32_t *fragment_length) |
| 1874 | { |
| 1875 | struct ffa_composite_memory_region *composite_memory_region; |
| 1876 | struct ffa_memory_access *receiver; |
| 1877 | uint32_t i; |
| 1878 | uint32_t constituents_offset; |
| 1879 | uint32_t receiver_count; |
| 1880 | |
| 1881 | assert(response != NULL); |
| 1882 | |
| 1883 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1884 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 1885 | (struct ffa_memory_region_v1_0 *)response; |
| 1886 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 1887 | ffa_memory_region_init_header_v1_0( |
| 1888 | retrieve_response, sender, attributes, flags, handle, 0, |
| 1889 | RECEIVERS_COUNT_IN_RETRIEVE_RESP); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1890 | |
| 1891 | receiver = &retrieve_response->receivers[0]; |
| 1892 | receiver_count = retrieve_response->receiver_count; |
| 1893 | |
| 1894 | receiver->composite_memory_region_offset = |
| 1895 | sizeof(struct ffa_memory_region_v1_0) + |
| 1896 | receiver_count * sizeof(struct ffa_memory_access); |
| 1897 | |
| 1898 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 1899 | retrieve_response, 0); |
| 1900 | } else { |
| 1901 | /* Default to FF-A v1.1 version. */ |
| 1902 | struct ffa_memory_region *retrieve_response = |
| 1903 | (struct ffa_memory_region *)response; |
| 1904 | |
| 1905 | ffa_memory_region_init_header(retrieve_response, sender, |
| 1906 | attributes, flags, handle, 0, 1); |
| 1907 | |
| 1908 | receiver = &retrieve_response->receivers[0]; |
| 1909 | receiver_count = retrieve_response->receiver_count; |
| 1910 | |
| 1911 | /* |
| 1912 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 1913 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 1914 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 1915 | * guaranteed that the offset we calculate here is aligned to a |
| 1916 | * 64-bit boundary and so 64-bit values can be copied without |
| 1917 | * alignment faults. |
| 1918 | */ |
| 1919 | receiver->composite_memory_region_offset = |
| 1920 | sizeof(struct ffa_memory_region) + |
| 1921 | receiver_count * sizeof(struct ffa_memory_access); |
| 1922 | |
| 1923 | composite_memory_region = |
| 1924 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 1925 | } |
| 1926 | |
| 1927 | assert(receiver != NULL); |
| 1928 | assert(composite_memory_region != NULL); |
| 1929 | |
| 1930 | /* |
| 1931 | * Initialized here as in memory retrieve responses we currently expect |
| 1932 | * one borrower to be specified. |
| 1933 | */ |
| 1934 | ffa_memory_access_init_permissions(receiver, receiver_id, 0, 0, flags); |
| 1935 | receiver->receiver_permissions.permissions = permissions; |
| 1936 | |
| 1937 | composite_memory_region->page_count = page_count; |
| 1938 | composite_memory_region->constituent_count = total_constituent_count; |
| 1939 | composite_memory_region->reserved_0 = 0; |
| 1940 | |
| 1941 | constituents_offset = receiver->composite_memory_region_offset + |
| 1942 | sizeof(struct ffa_composite_memory_region); |
| 1943 | if (constituents_offset + |
| 1944 | fragment_constituent_count * |
| 1945 | sizeof(struct ffa_memory_region_constituent) > |
| 1946 | response_max_size) { |
| 1947 | return false; |
| 1948 | } |
| 1949 | |
| 1950 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 1951 | composite_memory_region->constituents[i] = constituents[i]; |
| 1952 | } |
| 1953 | |
| 1954 | if (total_length != NULL) { |
| 1955 | *total_length = |
| 1956 | constituents_offset + |
| 1957 | composite_memory_region->constituent_count * |
| 1958 | sizeof(struct ffa_memory_region_constituent); |
| 1959 | } |
| 1960 | if (fragment_length != NULL) { |
| 1961 | *fragment_length = |
| 1962 | constituents_offset + |
| 1963 | fragment_constituent_count * |
| 1964 | sizeof(struct ffa_memory_region_constituent); |
| 1965 | } |
| 1966 | |
| 1967 | return true; |
| 1968 | } |
| 1969 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1970 | /* |
| 1971 | * Gets the receiver's access permissions from 'struct ffa_memory_region' and |
| 1972 | * returns its index in the receiver's array. If receiver's ID doesn't exist |
| 1973 | * in the array, return the region's 'receiver_count'. |
| 1974 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1975 | uint32_t ffa_memory_region_get_receiver(struct ffa_memory_region *memory_region, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 1976 | ffa_id_t receiver) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1977 | { |
| 1978 | struct ffa_memory_access *receivers; |
| 1979 | uint32_t i; |
| 1980 | |
| 1981 | assert(memory_region != NULL); |
| 1982 | |
| 1983 | receivers = memory_region->receivers; |
| 1984 | |
| 1985 | for (i = 0U; i < memory_region->receiver_count; i++) { |
| 1986 | if (receivers[i].receiver_permissions.receiver == receiver) { |
| 1987 | break; |
| 1988 | } |
| 1989 | } |
| 1990 | |
| 1991 | return i; |
| 1992 | } |
| 1993 | |
| 1994 | /** |
| 1995 | * Validates the retrieved permissions against those specified by the lender |
| 1996 | * of memory share operation. Optionally can help set the permissions to be used |
| 1997 | * for the S2 mapping, through the `permissions` argument. |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 1998 | * Returns FFA_SUCCESS if all the fields are valid. FFA_ERROR, with error code: |
| 1999 | * - FFA_INVALID_PARAMETERS -> if the fields have invalid values as per the |
| 2000 | * specification for each ABI. |
| 2001 | * - FFA_DENIED -> if the permissions specified by the retriever are not |
| 2002 | * less permissive than those provided by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2003 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2004 | static struct ffa_value ffa_memory_retrieve_is_memory_access_valid( |
| 2005 | uint32_t share_func, enum ffa_data_access sent_data_access, |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2006 | enum ffa_data_access requested_data_access, |
| 2007 | enum ffa_instruction_access sent_instruction_access, |
| 2008 | enum ffa_instruction_access requested_instruction_access, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2009 | ffa_memory_access_permissions_t *permissions, bool multiple_borrowers) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2010 | { |
| 2011 | switch (sent_data_access) { |
| 2012 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2013 | case FFA_DATA_ACCESS_RW: |
| 2014 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2015 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2016 | if (permissions != NULL) { |
| 2017 | ffa_set_data_access_attr(permissions, |
| 2018 | FFA_DATA_ACCESS_RW); |
| 2019 | } |
| 2020 | break; |
| 2021 | } |
| 2022 | /* Intentional fall-through. */ |
| 2023 | case FFA_DATA_ACCESS_RO: |
| 2024 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2025 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2026 | if (permissions != NULL) { |
| 2027 | ffa_set_data_access_attr(permissions, |
| 2028 | FFA_DATA_ACCESS_RO); |
| 2029 | } |
| 2030 | break; |
| 2031 | } |
| 2032 | dlog_verbose( |
| 2033 | "Invalid data access requested; sender specified " |
| 2034 | "permissions %#x but receiver requested %#x.\n", |
| 2035 | sent_data_access, requested_data_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2036 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2037 | case FFA_DATA_ACCESS_RESERVED: |
| 2038 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 2039 | "checked before this point."); |
| 2040 | } |
| 2041 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2042 | /* |
| 2043 | * For operations with a single borrower, If it is an FFA_MEMORY_LEND |
| 2044 | * or FFA_MEMORY_DONATE the retriever should have specifed the |
| 2045 | * instruction permissions it wishes to receive. |
| 2046 | */ |
| 2047 | switch (share_func) { |
| 2048 | case FFA_MEM_SHARE_32: |
| 2049 | if (requested_instruction_access != |
| 2050 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2051 | dlog_verbose( |
| 2052 | "%s: for share instruction permissions must " |
| 2053 | "NOT be specified.\n", |
| 2054 | __func__); |
| 2055 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2056 | } |
| 2057 | break; |
| 2058 | case FFA_MEM_LEND_32: |
| 2059 | /* |
| 2060 | * For operations with multiple borrowers only permit XN |
| 2061 | * permissions, and both Sender and borrower should have used |
| 2062 | * FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED. |
| 2063 | */ |
| 2064 | if (multiple_borrowers) { |
| 2065 | if (requested_instruction_access != |
| 2066 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2067 | dlog_verbose( |
| 2068 | "%s: lend/share/donate with multiple " |
| 2069 | "borrowers " |
| 2070 | "instruction permissions must NOT be " |
| 2071 | "specified.\n", |
| 2072 | __func__); |
| 2073 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2074 | } |
| 2075 | break; |
| 2076 | } |
| 2077 | /* Fall through if the operation targets a single borrower. */ |
| 2078 | case FFA_MEM_DONATE_32: |
| 2079 | if (!multiple_borrowers && |
| 2080 | requested_instruction_access == |
| 2081 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 2082 | dlog_verbose( |
| 2083 | "%s: for lend/donate with single borrower " |
| 2084 | "instruction permissions must be speficified " |
| 2085 | "by borrower\n", |
| 2086 | __func__); |
| 2087 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2088 | } |
| 2089 | break; |
| 2090 | default: |
| 2091 | panic("%s: Wrong func id provided.\n", __func__); |
| 2092 | } |
| 2093 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2094 | switch (sent_instruction_access) { |
| 2095 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2096 | case FFA_INSTRUCTION_ACCESS_X: |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2097 | if (requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2098 | if (permissions != NULL) { |
| 2099 | ffa_set_instruction_access_attr( |
| 2100 | permissions, FFA_INSTRUCTION_ACCESS_X); |
| 2101 | } |
| 2102 | break; |
| 2103 | } |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2104 | /* |
| 2105 | * Fall through if requested permissions are less |
| 2106 | * permissive than those provided by the sender. |
| 2107 | */ |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2108 | case FFA_INSTRUCTION_ACCESS_NX: |
| 2109 | if (requested_instruction_access == |
| 2110 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2111 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2112 | if (permissions != NULL) { |
| 2113 | ffa_set_instruction_access_attr( |
| 2114 | permissions, FFA_INSTRUCTION_ACCESS_NX); |
| 2115 | } |
| 2116 | break; |
| 2117 | } |
| 2118 | dlog_verbose( |
| 2119 | "Invalid instruction access requested; sender " |
| 2120 | "specified permissions %#x but receiver requested " |
| 2121 | "%#x.\n", |
| 2122 | sent_instruction_access, requested_instruction_access); |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2123 | return ffa_error(FFA_DENIED); |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2124 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2125 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 2126 | "be checked before this point."); |
| 2127 | } |
| 2128 | |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2129 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2130 | } |
| 2131 | |
| 2132 | /** |
| 2133 | * Validate the receivers' permissions in the retrieve request against those |
| 2134 | * specified by the lender. |
| 2135 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 2136 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2137 | * The function looks into the flag to bypass multiple borrower checks: |
| 2138 | * - If not set returns FFA_SUCCESS if all specified permissions are valid. |
| 2139 | * - If set returns FFA_SUCCESS if the descriptor contains the permissions |
| 2140 | * to the caller of FFA_MEM_RETRIEVE_REQ and they are valid. Other permissions |
| 2141 | * are ignored, if provided. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2142 | */ |
| 2143 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 2144 | struct ffa_memory_region *memory_region, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2145 | struct ffa_memory_region *retrieve_request, ffa_id_t to_vm_id, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2146 | ffa_memory_access_permissions_t *permissions, uint32_t func_id) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2147 | { |
| 2148 | uint32_t retrieve_receiver_index; |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2149 | bool bypass_multi_receiver_check = |
| 2150 | (retrieve_request->flags & |
| 2151 | FFA_MEMORY_REGION_FLAG_BYPASS_BORROWERS_CHECK) != 0U; |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2152 | const uint32_t region_receiver_count = memory_region->receiver_count; |
| 2153 | struct ffa_value ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2154 | |
| 2155 | assert(permissions != NULL); |
| 2156 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2157 | if (!bypass_multi_receiver_check) { |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2158 | if (retrieve_request->receiver_count != region_receiver_count) { |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2159 | dlog_verbose( |
| 2160 | "Retrieve request should contain same list of " |
| 2161 | "borrowers, as specified by the lender.\n"); |
| 2162 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2163 | } |
| 2164 | } else { |
| 2165 | if (retrieve_request->receiver_count != 1) { |
| 2166 | dlog_verbose( |
| 2167 | "Set bypass multiple borrower check, receiver " |
| 2168 | "list must be sized 1 (%x)\n", |
| 2169 | memory_region->receiver_count); |
| 2170 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2171 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2172 | } |
| 2173 | |
| 2174 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2175 | |
| 2176 | /* Should be populated with the permissions of the retriever. */ |
| 2177 | *permissions = 0; |
| 2178 | |
| 2179 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2180 | ffa_memory_access_permissions_t sent_permissions; |
| 2181 | struct ffa_memory_access *current_receiver = |
| 2182 | &retrieve_request->receivers[i]; |
| 2183 | ffa_memory_access_permissions_t requested_permissions = |
| 2184 | current_receiver->receiver_permissions.permissions; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2185 | ffa_id_t current_receiver_id = |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2186 | current_receiver->receiver_permissions.receiver; |
| 2187 | bool found_to_id = current_receiver_id == to_vm_id; |
| 2188 | |
J-Alves | 3456e03 | 2023-07-20 12:20:05 +0100 | [diff] [blame] | 2189 | if (bypass_multi_receiver_check && !found_to_id) { |
| 2190 | dlog_verbose( |
| 2191 | "Bypass multiple borrower check for id %x.\n", |
| 2192 | current_receiver_id); |
| 2193 | continue; |
| 2194 | } |
| 2195 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2196 | /* |
| 2197 | * Find the current receiver in the transaction descriptor from |
| 2198 | * sender. |
| 2199 | */ |
| 2200 | uint32_t mem_region_receiver_index = |
| 2201 | ffa_memory_region_get_receiver(memory_region, |
| 2202 | current_receiver_id); |
| 2203 | |
| 2204 | if (mem_region_receiver_index == |
| 2205 | memory_region->receiver_count) { |
| 2206 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2207 | current_receiver_id); |
| 2208 | return ffa_error(FFA_DENIED); |
| 2209 | } |
| 2210 | |
| 2211 | sent_permissions = |
| 2212 | memory_region->receivers[mem_region_receiver_index] |
| 2213 | .receiver_permissions.permissions; |
| 2214 | |
| 2215 | if (found_to_id) { |
| 2216 | retrieve_receiver_index = i; |
| 2217 | } |
| 2218 | |
| 2219 | /* |
| 2220 | * Since we are traversing the list of receivers, save the index |
| 2221 | * of the caller. As it needs to be there. |
| 2222 | */ |
| 2223 | |
| 2224 | if (current_receiver->composite_memory_region_offset != 0U) { |
| 2225 | dlog_verbose( |
| 2226 | "Retriever specified address ranges not " |
| 2227 | "supported (got offset %d).\n", |
| 2228 | current_receiver |
| 2229 | ->composite_memory_region_offset); |
| 2230 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2231 | } |
| 2232 | |
| 2233 | /* |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2234 | * Check if retrieve request memory access list is valid: |
| 2235 | * - The retrieve request complies with the specification. |
| 2236 | * - Permissions are within those specified by the sender. |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2237 | */ |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2238 | ret = ffa_memory_retrieve_is_memory_access_valid( |
| 2239 | func_id, ffa_get_data_access_attr(sent_permissions), |
| 2240 | ffa_get_data_access_attr(requested_permissions), |
| 2241 | ffa_get_instruction_access_attr(sent_permissions), |
| 2242 | ffa_get_instruction_access_attr(requested_permissions), |
| 2243 | found_to_id ? permissions : NULL, |
| 2244 | region_receiver_count > 1); |
| 2245 | if (ret.func != FFA_SUCCESS_32) { |
| 2246 | return ret; |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2247 | } |
| 2248 | |
| 2249 | /* |
| 2250 | * Can't request PM to clear memory if only provided with RO |
| 2251 | * permissions. |
| 2252 | */ |
| 2253 | if (found_to_id && |
| 2254 | (ffa_get_data_access_attr(*permissions) == |
| 2255 | FFA_DATA_ACCESS_RO) && |
| 2256 | (retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2257 | 0U) { |
| 2258 | dlog_verbose( |
| 2259 | "Receiver has RO permissions can not request " |
| 2260 | "clear.\n"); |
| 2261 | return ffa_error(FFA_DENIED); |
| 2262 | } |
| 2263 | } |
| 2264 | |
| 2265 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2266 | dlog_verbose( |
| 2267 | "Retrieve request does not contain caller's (%x) " |
| 2268 | "permissions\n", |
| 2269 | to_vm_id); |
| 2270 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2271 | } |
| 2272 | |
| 2273 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2274 | } |
| 2275 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2276 | /* |
| 2277 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 2278 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 2279 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 2280 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 2281 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 2282 | * exception of the sender ID and handle. |
| 2283 | */ |
| 2284 | bool is_ffa_memory_retrieve_borrower_request(struct ffa_memory_region *request, |
| 2285 | struct vm_locked to_locked) |
| 2286 | { |
| 2287 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
| 2288 | request->attributes == 0U && request->flags == 0U && |
| 2289 | request->tag == 0U && request->receiver_count == 0U && |
| 2290 | plat_ffa_memory_handle_allocated_by_current_world( |
| 2291 | request->handle); |
| 2292 | } |
| 2293 | |
| 2294 | /* |
| 2295 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 2296 | */ |
| 2297 | static void ffa_memory_retrieve_complete_from_hyp( |
| 2298 | struct ffa_memory_share_state *share_state) |
| 2299 | { |
| 2300 | if (share_state->hypervisor_fragment_count == |
| 2301 | share_state->fragment_count) { |
| 2302 | share_state->hypervisor_fragment_count = 0; |
| 2303 | } |
| 2304 | } |
| 2305 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2306 | /** |
| 2307 | * Validate that the memory region descriptor provided by the borrower on |
| 2308 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 2309 | * memory sharing call. |
| 2310 | */ |
| 2311 | static struct ffa_value ffa_memory_retrieve_validate( |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2312 | ffa_id_t receiver_id, struct ffa_memory_region *retrieve_request, |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2313 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 2314 | uint32_t share_func) |
| 2315 | { |
| 2316 | ffa_memory_region_flags_t transaction_type = |
| 2317 | retrieve_request->flags & |
| 2318 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2319 | enum ffa_memory_security security_state; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2320 | |
| 2321 | assert(retrieve_request != NULL); |
| 2322 | assert(memory_region != NULL); |
| 2323 | assert(receiver_index != NULL); |
| 2324 | assert(retrieve_request->sender == memory_region->sender); |
| 2325 | |
| 2326 | /* |
| 2327 | * Check that the transaction type expected by the receiver is |
| 2328 | * correct, if it has been specified. |
| 2329 | */ |
| 2330 | if (transaction_type != |
| 2331 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 2332 | transaction_type != (memory_region->flags & |
| 2333 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 2334 | dlog_verbose( |
| 2335 | "Incorrect transaction type %#x for " |
| 2336 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
| 2337 | transaction_type, |
| 2338 | memory_region->flags & |
| 2339 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 2340 | retrieve_request->handle); |
| 2341 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2342 | } |
| 2343 | |
| 2344 | if (retrieve_request->tag != memory_region->tag) { |
| 2345 | dlog_verbose( |
| 2346 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
| 2347 | "%d for handle %#x.\n", |
| 2348 | retrieve_request->tag, memory_region->tag, |
| 2349 | retrieve_request->handle); |
| 2350 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2351 | } |
| 2352 | |
| 2353 | *receiver_index = |
| 2354 | ffa_memory_region_get_receiver(memory_region, receiver_id); |
| 2355 | |
| 2356 | if (*receiver_index == memory_region->receiver_count) { |
| 2357 | dlog_verbose( |
| 2358 | "Incorrect receiver VM ID %d for " |
| 2359 | "FFA_MEM_RETRIEVE_REQ, for handle %#x.\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2360 | receiver_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2361 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2362 | } |
| 2363 | |
| 2364 | if ((retrieve_request->flags & |
| 2365 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 2366 | dlog_verbose( |
| 2367 | "Retriever specified 'address range alignment 'hint' " |
| 2368 | "not supported.\n"); |
| 2369 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2370 | } |
| 2371 | if ((retrieve_request->flags & |
| 2372 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 2373 | dlog_verbose( |
| 2374 | "Bits 8-5 must be zero in memory region's flags " |
| 2375 | "(address range alignment hint not supported).\n"); |
| 2376 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2377 | } |
| 2378 | |
| 2379 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 2380 | dlog_verbose( |
| 2381 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 2382 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2383 | } |
| 2384 | |
| 2385 | if (share_func == FFA_MEM_SHARE_32 && |
| 2386 | (retrieve_request->flags & |
| 2387 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2388 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 2389 | dlog_verbose( |
| 2390 | "Memory Share operation can't clean after relinquish " |
| 2391 | "memory region.\n"); |
| 2392 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2393 | } |
| 2394 | |
| 2395 | /* |
| 2396 | * If the borrower needs the memory to be cleared before mapping |
| 2397 | * to its address space, the sender should have set the flag |
| 2398 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 2399 | * FFA_DENIED. |
| 2400 | */ |
| 2401 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 2402 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 2403 | dlog_verbose( |
| 2404 | "Borrower needs memory cleared. Sender needs to set " |
| 2405 | "flag for clearing memory.\n"); |
| 2406 | return ffa_error(FFA_DENIED); |
| 2407 | } |
| 2408 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2409 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
| 2410 | security_state = |
| 2411 | ffa_get_memory_security_attr(retrieve_request->attributes); |
| 2412 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2413 | dlog_verbose( |
| 2414 | "Invalid security state for memory retrieve request " |
| 2415 | "operation.\n"); |
| 2416 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2417 | } |
| 2418 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2419 | /* |
| 2420 | * If memory type is not specified, bypass validation of memory |
| 2421 | * attributes in the retrieve request. The retriever is expecting to |
| 2422 | * obtain this information from the SPMC. |
| 2423 | */ |
| 2424 | if (ffa_get_memory_type_attr(retrieve_request->attributes) == |
| 2425 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 2426 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2427 | } |
| 2428 | |
| 2429 | /* |
| 2430 | * Ensure receiver's attributes are compatible with how |
| 2431 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 2432 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 2433 | */ |
| 2434 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 2435 | } |
| 2436 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2437 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 2438 | struct ffa_memory_region *retrieve_request, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2439 | uint32_t retrieve_request_length, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2440 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2441 | { |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2442 | uint32_t expected_retrieve_request_length = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2443 | sizeof(struct ffa_memory_region) + |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2444 | retrieve_request->receiver_count * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2445 | sizeof(struct ffa_memory_access); |
| 2446 | ffa_memory_handle_t handle = retrieve_request->handle; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2447 | struct ffa_memory_region *memory_region; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2448 | ffa_memory_access_permissions_t permissions = 0; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2449 | uint32_t memory_to_mode; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2450 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2451 | struct ffa_memory_share_state *share_state; |
| 2452 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2453 | struct ffa_composite_memory_region *composite; |
| 2454 | uint32_t total_length; |
| 2455 | uint32_t fragment_length; |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2456 | ffa_id_t receiver_id = to_locked.vm->id; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2457 | bool is_send_complete = false; |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2458 | ffa_memory_attributes_t attributes; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2459 | |
| 2460 | dump_share_states(); |
| 2461 | |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2462 | if (retrieve_request_length != expected_retrieve_request_length) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2463 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2464 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2465 | "but was %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2466 | expected_retrieve_request_length, |
| 2467 | retrieve_request_length); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2468 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2469 | } |
| 2470 | |
| 2471 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 2472 | share_state = get_share_state(share_states, handle); |
| 2473 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2474 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2475 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2476 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2477 | goto out; |
| 2478 | } |
| 2479 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2480 | if (!share_state->sending_complete) { |
| 2481 | dlog_verbose( |
| 2482 | "Memory with handle %#x not fully sent, can't " |
| 2483 | "retrieve.\n", |
| 2484 | handle); |
| 2485 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2486 | goto out; |
| 2487 | } |
| 2488 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2489 | memory_region = share_state->memory_region; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2490 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2491 | CHECK(memory_region != NULL); |
| 2492 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2493 | if (retrieve_request->sender != memory_region->sender) { |
| 2494 | dlog_verbose( |
| 2495 | "Memory with handle %#x not fully sent, can't " |
| 2496 | "retrieve.\n", |
| 2497 | handle); |
J-Alves | 41d4fef | 2023-11-16 16:20:09 +0000 | [diff] [blame] | 2498 | ret = ffa_error(FFA_DENIED); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2499 | goto out; |
| 2500 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2501 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2502 | if (!is_ffa_memory_retrieve_borrower_request(retrieve_request, |
| 2503 | to_locked)) { |
| 2504 | uint32_t receiver_index; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2505 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2506 | /* |
| 2507 | * The SPMC can only process retrieve requests to memory share |
| 2508 | * operations with one borrower from the other world. It can't |
| 2509 | * determine the ID of the NWd VM that invoked the retrieve |
| 2510 | * request interface call. It relies on the hypervisor to |
| 2511 | * validate the caller's ID against that provided in the |
| 2512 | * `receivers` list of the retrieve response. |
| 2513 | * In case there is only one borrower from the NWd in the |
| 2514 | * transaction descriptor, record that in the `receiver_id` for |
| 2515 | * later use, and validate in the retrieve request message. |
J-Alves | 3fa82aa | 2023-09-20 18:19:21 +0100 | [diff] [blame] | 2516 | * This limitation is due to the fact SPMC can't determine the |
| 2517 | * index in the memory share structures state to update. |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2518 | */ |
| 2519 | if (to_locked.vm->id == HF_HYPERVISOR_VM_ID) { |
| 2520 | uint32_t other_world_count = 0; |
| 2521 | |
| 2522 | for (uint32_t i = 0; i < memory_region->receiver_count; |
| 2523 | i++) { |
| 2524 | receiver_id = |
| 2525 | retrieve_request->receivers[0] |
| 2526 | .receiver_permissions.receiver; |
| 2527 | if (!vm_id_is_current_world(receiver_id)) { |
| 2528 | other_world_count++; |
| 2529 | } |
| 2530 | } |
| 2531 | if (other_world_count > 1) { |
| 2532 | dlog_verbose( |
| 2533 | "Support one receiver from the other " |
| 2534 | "world.\n"); |
| 2535 | return ffa_error(FFA_NOT_SUPPORTED); |
| 2536 | } |
| 2537 | } |
| 2538 | |
| 2539 | /* |
| 2540 | * Validate retrieve request, according to what was sent by the |
| 2541 | * sender. Function will output the `receiver_index` from the |
J-Alves | 3fa82aa | 2023-09-20 18:19:21 +0100 | [diff] [blame] | 2542 | * provided memory region. |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2543 | */ |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2544 | ret = ffa_memory_retrieve_validate( |
| 2545 | receiver_id, retrieve_request, memory_region, |
| 2546 | &receiver_index, share_state->share_func); |
| 2547 | if (ret.func != FFA_SUCCESS_32) { |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2548 | goto out; |
| 2549 | } |
| 2550 | |
| 2551 | if (share_state->retrieved_fragment_count[receiver_index] != |
| 2552 | 0U) { |
| 2553 | dlog_verbose( |
| 2554 | "Memory with handle %#x already retrieved.\n", |
| 2555 | handle); |
| 2556 | ret = ffa_error(FFA_DENIED); |
| 2557 | goto out; |
| 2558 | } |
| 2559 | |
J-Alves | 3fa82aa | 2023-09-20 18:19:21 +0100 | [diff] [blame] | 2560 | /* |
| 2561 | * Validate the requested permissions against the sent |
| 2562 | * permissions. |
| 2563 | * Outputs the permissions to give to retriever at S2 |
| 2564 | * PTs. |
| 2565 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2566 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 2567 | memory_region, retrieve_request, receiver_id, |
J-Alves | dcad899 | 2023-09-15 14:10:35 +0100 | [diff] [blame] | 2568 | &permissions, share_state->share_func); |
J-Alves | 614d9f4 | 2022-06-28 14:03:10 +0100 | [diff] [blame] | 2569 | if (ret.func != FFA_SUCCESS_32) { |
| 2570 | goto out; |
| 2571 | } |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 2572 | |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2573 | memory_to_mode = ffa_memory_permissions_to_mode( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2574 | permissions, share_state->sender_orig_mode); |
J-Alves | 40e260e | 2022-09-22 17:52:43 +0100 | [diff] [blame] | 2575 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2576 | ret = ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 2577 | to_locked, share_state->fragments, |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2578 | share_state->fragment_constituent_counts, |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2579 | share_state->fragment_count, memory_to_mode, |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2580 | share_state->share_func, false, page_pool); |
| 2581 | |
| 2582 | if (ret.func != FFA_SUCCESS_32) { |
| 2583 | goto out; |
| 2584 | } |
| 2585 | |
| 2586 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 2587 | is_send_complete = |
| 2588 | share_state->retrieved_fragment_count[receiver_index] == |
| 2589 | share_state->fragment_count; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2590 | |
| 2591 | share_state->clear_after_relinquish = |
| 2592 | (retrieve_request->flags & |
| 2593 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH) != 0U; |
| 2594 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2595 | } else { |
| 2596 | if (share_state->hypervisor_fragment_count != 0U) { |
| 2597 | dlog_verbose( |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2598 | "Memory with handle %#x already retrieved by " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2599 | "the hypervisor.\n", |
| 2600 | handle); |
| 2601 | ret = ffa_error(FFA_DENIED); |
| 2602 | goto out; |
| 2603 | } |
| 2604 | |
| 2605 | share_state->hypervisor_fragment_count = 1; |
| 2606 | |
| 2607 | ffa_memory_retrieve_complete_from_hyp(share_state); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2608 | } |
| 2609 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2610 | /* VMs acquire the RX buffer from SPMC. */ |
| 2611 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2612 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2613 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2614 | * Copy response to RX buffer of caller and deliver the message. |
| 2615 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2616 | */ |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2617 | /* TODO: combine attributes from sender and request. */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2618 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2619 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2620 | * Constituents which we received in the first fragment should |
| 2621 | * always fit in the first fragment we are sending, because the |
| 2622 | * header is the same size in both cases and we have a fixed |
| 2623 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 2624 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2625 | */ |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2626 | |
| 2627 | /* |
| 2628 | * Set the security state in the memory retrieve response attributes |
| 2629 | * if specified by the target mode. |
| 2630 | */ |
| 2631 | attributes = plat_ffa_memory_security_mode( |
| 2632 | memory_region->attributes, share_state->sender_orig_mode); |
| 2633 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2634 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2635 | to_locked.vm->mailbox.recv, to_locked.vm->ffa_version, |
Olivier Deprez | 878bd5b | 2021-04-15 19:05:10 +0200 | [diff] [blame] | 2636 | HF_MAILBOX_SIZE, memory_region->sender, attributes, |
| 2637 | memory_region->flags, handle, receiver_id, permissions, |
| 2638 | composite->page_count, composite->constituent_count, |
| 2639 | share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2640 | share_state->fragment_constituent_counts[0], &total_length, |
| 2641 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2642 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2643 | to_locked.vm->mailbox.recv_size = fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2644 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2645 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2646 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2647 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2648 | if (is_send_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2649 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2650 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2651 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2652 | ret = (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2653 | .arg1 = total_length, |
| 2654 | .arg2 = fragment_length}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2655 | out: |
| 2656 | share_states_unlock(&share_states); |
| 2657 | dump_share_states(); |
| 2658 | return ret; |
| 2659 | } |
| 2660 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2661 | /** |
| 2662 | * Determine expected fragment offset according to the FF-A version of |
| 2663 | * the caller. |
| 2664 | */ |
| 2665 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2666 | struct ffa_memory_region *memory_region, |
| 2667 | uint32_t retrieved_constituents_count, uint32_t ffa_version) |
| 2668 | { |
| 2669 | uint32_t expected_fragment_offset; |
| 2670 | uint32_t composite_constituents_offset; |
| 2671 | |
| 2672 | if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 2673 | /* |
| 2674 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 2675 | * can retrieve the constituents offset from descriptor. |
| 2676 | */ |
| 2677 | composite_constituents_offset = |
| 2678 | ffa_composite_constituent_offset(memory_region, 0); |
| 2679 | } else if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 2680 | /* |
| 2681 | * If retriever is FF-A v1.0, determine the composite offset |
| 2682 | * as it is expected to have been configured in the |
| 2683 | * retrieve response. |
| 2684 | */ |
| 2685 | composite_constituents_offset = |
| 2686 | sizeof(struct ffa_memory_region_v1_0) + |
| 2687 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
| 2688 | sizeof(struct ffa_memory_access) + |
| 2689 | sizeof(struct ffa_composite_memory_region); |
| 2690 | } else { |
| 2691 | panic("%s received an invalid FF-A version.\n", __func__); |
| 2692 | } |
| 2693 | |
| 2694 | expected_fragment_offset = |
| 2695 | composite_constituents_offset + |
| 2696 | retrieved_constituents_count * |
| 2697 | sizeof(struct ffa_memory_region_constituent) - |
| 2698 | sizeof(struct ffa_memory_access) * |
| 2699 | (memory_region->receiver_count - 1); |
| 2700 | |
| 2701 | return expected_fragment_offset; |
| 2702 | } |
| 2703 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2704 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 2705 | ffa_memory_handle_t handle, |
| 2706 | uint32_t fragment_offset, |
J-Alves | 19e20cf | 2023-08-02 12:48:55 +0100 | [diff] [blame] | 2707 | ffa_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2708 | struct mpool *page_pool) |
| 2709 | { |
| 2710 | struct ffa_memory_region *memory_region; |
| 2711 | struct share_states_locked share_states; |
| 2712 | struct ffa_memory_share_state *share_state; |
| 2713 | struct ffa_value ret; |
| 2714 | uint32_t fragment_index; |
| 2715 | uint32_t retrieved_constituents_count; |
| 2716 | uint32_t i; |
| 2717 | uint32_t expected_fragment_offset; |
| 2718 | uint32_t remaining_constituent_count; |
| 2719 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2720 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2721 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2722 | |
| 2723 | dump_share_states(); |
| 2724 | |
| 2725 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 2726 | share_state = get_share_state(share_states, handle); |
| 2727 | if (!share_state) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2728 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 2729 | handle); |
| 2730 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2731 | goto out; |
| 2732 | } |
| 2733 | |
| 2734 | memory_region = share_state->memory_region; |
| 2735 | CHECK(memory_region != NULL); |
| 2736 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2737 | if (!share_state->sending_complete) { |
| 2738 | dlog_verbose( |
| 2739 | "Memory with handle %#x not fully sent, can't " |
| 2740 | "retrieve.\n", |
| 2741 | handle); |
| 2742 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2743 | goto out; |
| 2744 | } |
| 2745 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2746 | /* |
| 2747 | * If retrieve request from the hypervisor has been initiated in the |
| 2748 | * given share_state, continue it, else assume it is a continuation of |
| 2749 | * retrieve request from a NWd VM. |
| 2750 | */ |
| 2751 | continue_ffa_hyp_mem_retrieve_req = |
| 2752 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 2753 | (share_state->hypervisor_fragment_count != 0U) && |
J-Alves | 661e1b7 | 2023-08-02 13:39:40 +0100 | [diff] [blame] | 2754 | ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2755 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2756 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2757 | receiver_index = ffa_memory_region_get_receiver( |
| 2758 | memory_region, to_locked.vm->id); |
| 2759 | |
| 2760 | if (receiver_index == memory_region->receiver_count) { |
| 2761 | dlog_verbose( |
| 2762 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
| 2763 | "borrower to memory sharing transaction (%x)\n", |
| 2764 | to_locked.vm->id, handle); |
| 2765 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2766 | goto out; |
| 2767 | } |
| 2768 | |
| 2769 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2770 | 0 || |
| 2771 | share_state->retrieved_fragment_count[receiver_index] >= |
| 2772 | share_state->fragment_count) { |
| 2773 | dlog_verbose( |
| 2774 | "Retrieval of memory with handle %#x not yet " |
| 2775 | "started or already completed (%d/%d fragments " |
| 2776 | "retrieved).\n", |
| 2777 | handle, |
| 2778 | share_state->retrieved_fragment_count |
| 2779 | [receiver_index], |
| 2780 | share_state->fragment_count); |
| 2781 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2782 | goto out; |
| 2783 | } |
| 2784 | |
| 2785 | fragment_index = |
| 2786 | share_state->retrieved_fragment_count[receiver_index]; |
| 2787 | } else { |
| 2788 | if (share_state->hypervisor_fragment_count == 0 || |
| 2789 | share_state->hypervisor_fragment_count >= |
| 2790 | share_state->fragment_count) { |
| 2791 | dlog_verbose( |
| 2792 | "Retrieve of memory with handle %x not " |
| 2793 | "started from hypervisor.\n", |
| 2794 | handle); |
| 2795 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2796 | goto out; |
| 2797 | } |
| 2798 | |
| 2799 | if (memory_region->sender != sender_vm_id) { |
| 2800 | dlog_verbose( |
| 2801 | "Sender ID (%x) is not as expected for memory " |
| 2802 | "handle %x\n", |
| 2803 | sender_vm_id, handle); |
| 2804 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2805 | goto out; |
| 2806 | } |
| 2807 | |
| 2808 | fragment_index = share_state->hypervisor_fragment_count; |
| 2809 | |
| 2810 | receiver_index = 0; |
| 2811 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2812 | |
| 2813 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2814 | * Check that the given fragment offset is correct by counting |
| 2815 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2816 | */ |
| 2817 | retrieved_constituents_count = 0; |
| 2818 | for (i = 0; i < fragment_index; ++i) { |
| 2819 | retrieved_constituents_count += |
| 2820 | share_state->fragment_constituent_counts[i]; |
| 2821 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2822 | |
| 2823 | CHECK(memory_region->receiver_count > 0); |
| 2824 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2825 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2826 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2827 | memory_region, retrieved_constituents_count, |
| 2828 | to_locked.vm->ffa_version); |
| 2829 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2830 | if (fragment_offset != expected_fragment_offset) { |
| 2831 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 2832 | fragment_offset, expected_fragment_offset); |
| 2833 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2834 | goto out; |
| 2835 | } |
| 2836 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2837 | /* VMs acquire the RX buffer from SPMC. */ |
| 2838 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2839 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2840 | remaining_constituent_count = ffa_memory_fragment_init( |
| 2841 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2842 | share_state->fragments[fragment_index], |
| 2843 | share_state->fragment_constituent_counts[fragment_index], |
| 2844 | &fragment_length); |
| 2845 | CHECK(remaining_constituent_count == 0); |
| 2846 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 2847 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 2848 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2849 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2850 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2851 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2852 | share_state->retrieved_fragment_count[receiver_index]++; |
| 2853 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2854 | share_state->fragment_count) { |
| 2855 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2856 | page_pool); |
| 2857 | } |
| 2858 | } else { |
| 2859 | share_state->hypervisor_fragment_count++; |
| 2860 | |
| 2861 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 2862 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2863 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 2864 | .arg1 = (uint32_t)handle, |
| 2865 | .arg2 = (uint32_t)(handle >> 32), |
| 2866 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2867 | |
| 2868 | out: |
| 2869 | share_states_unlock(&share_states); |
| 2870 | dump_share_states(); |
| 2871 | return ret; |
| 2872 | } |
| 2873 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2874 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2875 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2876 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2877 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2878 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2879 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2880 | struct ffa_memory_share_state *share_state; |
| 2881 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2882 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2883 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2884 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2885 | bool receivers_relinquished_memory; |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame^] | 2886 | ffa_memory_access_permissions_t receiver_permissions = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2887 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2888 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2889 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2890 | "Stream endpoints not supported (got %d " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2891 | "endpoints on FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2892 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2893 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2894 | } |
| 2895 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2896 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2897 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2898 | "VM ID %d in relinquish message doesn't match " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2899 | "calling VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2900 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2901 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2902 | } |
| 2903 | |
| 2904 | dump_share_states(); |
| 2905 | |
| 2906 | share_states = share_states_lock(); |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 2907 | share_state = get_share_state(share_states, handle); |
| 2908 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2909 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2910 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2911 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2912 | goto out; |
| 2913 | } |
| 2914 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2915 | if (!share_state->sending_complete) { |
| 2916 | dlog_verbose( |
| 2917 | "Memory with handle %#x not fully sent, can't " |
| 2918 | "relinquish.\n", |
| 2919 | handle); |
| 2920 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2921 | goto out; |
| 2922 | } |
| 2923 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2924 | memory_region = share_state->memory_region; |
| 2925 | CHECK(memory_region != NULL); |
| 2926 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2927 | receiver_index = ffa_memory_region_get_receiver(memory_region, |
| 2928 | from_locked.vm->id); |
| 2929 | |
| 2930 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2931 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2932 | "VM ID %d tried to relinquish memory region " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2933 | "with handle %#x and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2934 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2935 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2936 | goto out; |
| 2937 | } |
| 2938 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2939 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2940 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2941 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2942 | "Memory with handle %#x not yet fully " |
| 2943 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2944 | "receiver %x can't relinquish.\n", |
| 2945 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2946 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2947 | goto out; |
| 2948 | } |
| 2949 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2950 | /* |
| 2951 | * Either clear if requested in relinquish call, or in a retrieve |
| 2952 | * request from one of the borrowers. |
| 2953 | */ |
| 2954 | receivers_relinquished_memory = true; |
| 2955 | |
| 2956 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2957 | struct ffa_memory_access *receiver = |
| 2958 | &memory_region->receivers[i]; |
| 2959 | |
| 2960 | if (receiver->receiver_permissions.receiver == |
| 2961 | from_locked.vm->id) { |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame^] | 2962 | receiver_permissions = |
| 2963 | receiver->receiver_permissions.permissions; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2964 | continue; |
| 2965 | } |
| 2966 | |
| 2967 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 2968 | receivers_relinquished_memory = false; |
| 2969 | break; |
| 2970 | } |
| 2971 | } |
| 2972 | |
| 2973 | clear = receivers_relinquished_memory && |
| 2974 | (share_state->clear_after_relinquish || |
| 2975 | (relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2976 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2977 | |
| 2978 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2979 | * Clear is not allowed for memory that was shared, as the |
| 2980 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2981 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2982 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2983 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2984 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2985 | goto out; |
| 2986 | } |
| 2987 | |
J-Alves | 639ddfc | 2023-11-21 14:17:26 +0000 | [diff] [blame^] | 2988 | if (clear && receiver_permissions == FFA_DATA_ACCESS_RO) { |
| 2989 | dlog_verbose("%s: RO memory can't use clear memory flag.\n", |
| 2990 | __func__); |
| 2991 | ret = ffa_error(FFA_DENIED); |
| 2992 | goto out; |
| 2993 | } |
| 2994 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2995 | ret = ffa_relinquish_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 2996 | from_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2997 | share_state->fragment_constituent_counts, |
| 2998 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2999 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3000 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3001 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3002 | * Mark memory handle as not retrieved, so it can be |
| 3003 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3004 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 3005 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3006 | } |
| 3007 | |
| 3008 | out: |
| 3009 | share_states_unlock(&share_states); |
| 3010 | dump_share_states(); |
| 3011 | return ret; |
| 3012 | } |
| 3013 | |
| 3014 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3015 | * Validates that the reclaim transition is allowed for the given |
| 3016 | * handle, updates the page table of the reclaiming VM, and frees the |
| 3017 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3018 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3019 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3020 | ffa_memory_handle_t handle, |
| 3021 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3022 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3023 | { |
| 3024 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3025 | struct ffa_memory_share_state *share_state; |
| 3026 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3027 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3028 | |
| 3029 | dump_share_states(); |
| 3030 | |
| 3031 | share_states = share_states_lock(); |
Karl Meakin | 52cdfe7 | 2023-06-30 14:49:10 +0100 | [diff] [blame] | 3032 | |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3033 | share_state = get_share_state(share_states, handle); |
| 3034 | if (!share_state) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3035 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3036 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3037 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3038 | goto out; |
| 3039 | } |
Karl Meakin | 4a2854a | 2023-06-30 16:26:52 +0100 | [diff] [blame] | 3040 | memory_region = share_state->memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3041 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3042 | CHECK(memory_region != NULL); |
| 3043 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3044 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 3045 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3046 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 3047 | "VM %#x attempted to reclaim memory handle %#x " |
| 3048 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3049 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3050 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3051 | goto out; |
| 3052 | } |
| 3053 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3054 | if (!share_state->sending_complete) { |
| 3055 | dlog_verbose( |
| 3056 | "Memory with handle %#x not fully sent, can't " |
| 3057 | "reclaim.\n", |
| 3058 | handle); |
| 3059 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 3060 | goto out; |
| 3061 | } |
| 3062 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3063 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 3064 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 3065 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3066 | "Tried to reclaim memory handle %#x " |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3067 | "that has not been relinquished by all " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 3068 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 3069 | handle, |
| 3070 | memory_region->receivers[i] |
| 3071 | .receiver_permissions.receiver); |
| 3072 | ret = ffa_error(FFA_DENIED); |
| 3073 | goto out; |
| 3074 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3075 | } |
| 3076 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3077 | ret = ffa_retrieve_check_update( |
J-Alves | 2648338 | 2023-04-20 12:01:49 +0100 | [diff] [blame] | 3078 | to_locked, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3079 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 3080 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 3081 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3082 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 3083 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3084 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 3085 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 3086 | } |
| 3087 | |
| 3088 | out: |
| 3089 | share_states_unlock(&share_states); |
| 3090 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 3091 | } |