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 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 15 | #include "hf/api.h" |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 16 | #include "hf/assert.h" |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 17 | #include "hf/check.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 18 | #include "hf/dlog.h" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 19 | #include "hf/ffa_internal.h" |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 20 | #include "hf/ffa_memory_internal.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 21 | #include "hf/mpool.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 22 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 23 | #include "hf/vm.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 24 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 25 | #include "vmapi/hf/ffa_v1_0.h" |
| 26 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 27 | #define RECEIVERS_COUNT_IN_RETRIEVE_RESP 1 |
| 28 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 29 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 30 | * 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] | 31 | * by this lock. |
| 32 | */ |
| 33 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 34 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 35 | |
| 36 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 37 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 38 | */ |
| 39 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 40 | { |
| 41 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 42 | } |
| 43 | |
| 44 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 45 | * Initialises the next available `struct ffa_memory_share_state` and sets |
| 46 | * `share_state_ret` to a pointer to it. If `handle` is |
| 47 | * `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, otherwise |
| 48 | * uses the provided handle which is assumed to be globally unique. |
| 49 | * |
| 50 | * Returns true on success or false if none are available. |
| 51 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 52 | bool allocate_share_state(struct share_states_locked share_states, |
| 53 | uint32_t share_func, |
| 54 | struct ffa_memory_region *memory_region, |
| 55 | uint32_t fragment_length, ffa_memory_handle_t handle, |
| 56 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 57 | { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 58 | uint64_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 59 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 60 | assert(share_states.share_states != NULL); |
| 61 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 62 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 63 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 64 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 65 | uint32_t j; |
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; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 88 | for (j = 0; j < MAX_MEM_SHARE_RECIPIENTS; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 89 | allocated_state->retrieved_fragment_count[j] = |
| 90 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 91 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 92 | if (share_state_ret != NULL) { |
| 93 | *share_state_ret = allocated_state; |
| 94 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 95 | return true; |
| 96 | } |
| 97 | } |
| 98 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 99 | return false; |
| 100 | } |
| 101 | |
| 102 | /** Locks the share states lock. */ |
| 103 | struct share_states_locked share_states_lock(void) |
| 104 | { |
| 105 | sl_lock(&share_states_lock_instance); |
| 106 | |
| 107 | return (struct share_states_locked){.share_states = share_states}; |
| 108 | } |
| 109 | |
| 110 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 111 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 112 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 113 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 114 | share_states->share_states = NULL; |
| 115 | sl_unlock(&share_states_lock_instance); |
| 116 | } |
| 117 | |
| 118 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 119 | * If the given handle is a valid handle for an allocated share state then |
| 120 | * initialises `share_state_ret` to point to the share state and returns true. |
| 121 | * Otherwise returns false. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 122 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 123 | bool get_share_state(struct share_states_locked share_states, |
| 124 | ffa_memory_handle_t handle, |
| 125 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 126 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 127 | struct ffa_memory_share_state *share_state; |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 128 | uint64_t index; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 129 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 130 | assert(share_states.share_states != NULL); |
| 131 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 132 | |
| 133 | /* |
| 134 | * First look for a share_state allocated by us, in which case the |
| 135 | * handle is based on the index. |
| 136 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 137 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 138 | index = ffa_memory_handle_get_index(handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 139 | if (index < MAX_MEM_SHARES) { |
| 140 | share_state = &share_states.share_states[index]; |
| 141 | if (share_state->share_func != 0) { |
| 142 | *share_state_ret = share_state; |
| 143 | return true; |
| 144 | } |
| 145 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 146 | } |
| 147 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 148 | /* Fall back to a linear scan. */ |
| 149 | for (index = 0; index < MAX_MEM_SHARES; ++index) { |
| 150 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 151 | if (share_state->memory_region != NULL && |
| 152 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 153 | share_state->share_func != 0) { |
| 154 | *share_state_ret = share_state; |
| 155 | return true; |
| 156 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 157 | } |
| 158 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 159 | return false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 163 | void share_state_free(struct share_states_locked share_states, |
| 164 | struct ffa_memory_share_state *share_state, |
| 165 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 166 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 167 | uint32_t i; |
| 168 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 169 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 170 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 171 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 172 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 173 | /* |
| 174 | * First fragment is part of the same page as the `memory_region`, so it |
| 175 | * doesn't need to be freed separately. |
| 176 | */ |
| 177 | share_state->fragments[0] = NULL; |
| 178 | share_state->fragment_constituent_counts[0] = 0; |
| 179 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 180 | mpool_free(page_pool, share_state->fragments[i]); |
| 181 | share_state->fragments[i] = NULL; |
| 182 | share_state->fragment_constituent_counts[i] = 0; |
| 183 | } |
| 184 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 185 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 186 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 187 | } |
| 188 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 189 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 190 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 191 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 192 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 193 | struct ffa_composite_memory_region *composite; |
| 194 | uint32_t expected_constituent_count; |
| 195 | uint32_t fragment_constituent_count_total = 0; |
| 196 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 197 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 198 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 199 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 200 | |
| 201 | /* |
| 202 | * Share state must already be valid, or it's not possible to get hold |
| 203 | * of it. |
| 204 | */ |
| 205 | CHECK(share_state->memory_region != NULL && |
| 206 | share_state->share_func != 0); |
| 207 | |
| 208 | composite = |
| 209 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 210 | expected_constituent_count = composite->constituent_count; |
| 211 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 212 | fragment_constituent_count_total += |
| 213 | share_state->fragment_constituent_counts[i]; |
| 214 | } |
| 215 | dlog_verbose( |
| 216 | "Checking completion: constituent count %d/%d from %d " |
| 217 | "fragments.\n", |
| 218 | fragment_constituent_count_total, expected_constituent_count, |
| 219 | share_state->fragment_count); |
| 220 | |
| 221 | return fragment_constituent_count_total == expected_constituent_count; |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Calculates the offset of the next fragment expected for the given share |
| 226 | * state. |
| 227 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 228 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 229 | struct share_states_locked share_states, |
| 230 | struct ffa_memory_share_state *share_state) |
| 231 | { |
| 232 | uint32_t next_fragment_offset; |
| 233 | uint32_t i; |
| 234 | |
| 235 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 236 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 237 | |
| 238 | next_fragment_offset = |
| 239 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 240 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 241 | next_fragment_offset += |
| 242 | share_state->fragment_constituent_counts[i] * |
| 243 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 244 | } |
| 245 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 246 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 247 | } |
| 248 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 249 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 250 | { |
| 251 | uint32_t i; |
| 252 | |
| 253 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 254 | return; |
| 255 | } |
| 256 | |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 257 | dlog("from VM %#x, attributes %#x, flags %#x, tag %u, to " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 258 | "%u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 259 | "recipients [", |
| 260 | memory_region->sender, memory_region->attributes, |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 261 | memory_region->flags, memory_region->tag, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 262 | memory_region->receiver_count); |
| 263 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 264 | if (i != 0) { |
| 265 | dlog(", "); |
| 266 | } |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 267 | dlog("VM %#x: %#x (offset %u)", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 268 | memory_region->receivers[i].receiver_permissions.receiver, |
| 269 | memory_region->receivers[i] |
| 270 | .receiver_permissions.permissions, |
| 271 | memory_region->receivers[i] |
| 272 | .composite_memory_region_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 273 | } |
| 274 | dlog("]"); |
| 275 | } |
| 276 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 277 | void dump_share_states(void) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 278 | { |
| 279 | uint32_t i; |
| 280 | |
| 281 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 282 | return; |
| 283 | } |
| 284 | |
| 285 | dlog("Current share states:\n"); |
| 286 | sl_lock(&share_states_lock_instance); |
| 287 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 288 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 289 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 290 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 291 | dlog("SHARE"); |
| 292 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 293 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 294 | dlog("LEND"); |
| 295 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 296 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 297 | dlog("DONATE"); |
| 298 | break; |
| 299 | default: |
| 300 | dlog("invalid share_func %#x", |
| 301 | share_states[i].share_func); |
| 302 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 303 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 304 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 305 | if (share_states[i].sending_complete) { |
| 306 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 307 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 308 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 309 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 310 | dlog(" with %d fragments, %d retrieved, " |
| 311 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 312 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 313 | share_states[i].retrieved_fragment_count[0], |
| 314 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | sl_unlock(&share_states_lock_instance); |
| 318 | } |
| 319 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 320 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 321 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 322 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 323 | { |
| 324 | uint32_t mode = 0; |
| 325 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 326 | switch (ffa_get_data_access_attr(permissions)) { |
| 327 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 328 | mode = MM_MODE_R; |
| 329 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 330 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 331 | mode = MM_MODE_R | MM_MODE_W; |
| 332 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 333 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 334 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 335 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 336 | case FFA_DATA_ACCESS_RESERVED: |
| 337 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 338 | } |
| 339 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 340 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 341 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 342 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 343 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 344 | mode |= MM_MODE_X; |
| 345 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 346 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 347 | mode |= (default_mode & MM_MODE_X); |
| 348 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 349 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 350 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | return mode; |
| 354 | } |
| 355 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 356 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 357 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 358 | * 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] | 359 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 360 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 361 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 362 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 363 | struct ffa_memory_region_constituent **fragments, |
| 364 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 365 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 366 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 367 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 368 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 369 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 370 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 371 | * Fail if there are no constituents. Otherwise we would get an |
| 372 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 373 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 374 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 375 | } |
| 376 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 377 | for (i = 0; i < fragment_count; ++i) { |
| 378 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 379 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 380 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 381 | ipaddr_t end = ipa_add(begin, size); |
| 382 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 383 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 384 | /* Fail if addresses are not page-aligned. */ |
| 385 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 386 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
| 387 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 388 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 389 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 390 | /* |
| 391 | * Ensure that this constituent memory range is all |
| 392 | * mapped with the same mode. |
| 393 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 394 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 395 | return ffa_error(FFA_DENIED); |
| 396 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 397 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 398 | /* |
| 399 | * Ensure that all constituents are mapped with the same |
| 400 | * mode. |
| 401 | */ |
| 402 | if (i == 0) { |
| 403 | *orig_mode = current_mode; |
| 404 | } else if (current_mode != *orig_mode) { |
| 405 | dlog_verbose( |
| 406 | "Expected mode %#x but was %#x for %d " |
| 407 | "pages at %#x.\n", |
| 408 | *orig_mode, current_mode, |
| 409 | fragments[i][j].page_count, |
| 410 | ipa_addr(begin)); |
| 411 | return ffa_error(FFA_DENIED); |
| 412 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 413 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 414 | } |
| 415 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 416 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Verify that all pages have the same mode, that the starting mode |
| 421 | * constitutes a valid state and obtain the next mode to apply |
| 422 | * to the sending VM. |
| 423 | * |
| 424 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 425 | * 1) FFA_DENIED if a state transition was not found; |
| 426 | * 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] | 427 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 428 | * 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] | 429 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 430 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 431 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 432 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 433 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 434 | struct vm_locked from, uint32_t share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 435 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 436 | uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 437 | struct ffa_memory_region_constituent **fragments, |
| 438 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 439 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 440 | { |
| 441 | const uint32_t state_mask = |
| 442 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 443 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 444 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 445 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 446 | fragment_constituent_counts, |
| 447 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 448 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 449 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 450 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 451 | } |
| 452 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 453 | /* Ensure the address range is normal memory and not a device. */ |
| 454 | if (*orig_from_mode & MM_MODE_D) { |
| 455 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 456 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 457 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Ensure the sender is the owner and has exclusive access to the |
| 462 | * memory. |
| 463 | */ |
| 464 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 465 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 466 | } |
| 467 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 468 | assert(receivers != NULL && receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 469 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 470 | for (uint32_t i = 0U; i < receivers_count; i++) { |
| 471 | ffa_memory_access_permissions_t permissions = |
| 472 | receivers[i].receiver_permissions.permissions; |
| 473 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 474 | permissions, *orig_from_mode); |
| 475 | |
| 476 | if ((*orig_from_mode & required_from_mode) != |
| 477 | required_from_mode) { |
| 478 | dlog_verbose( |
| 479 | "Sender tried to send memory with permissions " |
| 480 | "which " |
| 481 | "required mode %#x but only had %#x itself.\n", |
| 482 | required_from_mode, *orig_from_mode); |
| 483 | return ffa_error(FFA_DENIED); |
| 484 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /* Find the appropriate new mode. */ |
| 488 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 489 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 490 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 491 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 492 | break; |
| 493 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 494 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 495 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 496 | break; |
| 497 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 498 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 499 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 500 | break; |
| 501 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 502 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 503 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 504 | } |
| 505 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 506 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 507 | } |
| 508 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 509 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 510 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 511 | struct ffa_memory_region_constituent **fragments, |
| 512 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 513 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 514 | { |
| 515 | const uint32_t state_mask = |
| 516 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 517 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 518 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 519 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 520 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 521 | fragment_constituent_counts, |
| 522 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 523 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 524 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | /* Ensure the address range is normal memory and not a device. */ |
| 528 | if (*orig_from_mode & MM_MODE_D) { |
| 529 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 530 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 531 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | /* |
| 535 | * Ensure the relinquishing VM is not the owner but has access to the |
| 536 | * memory. |
| 537 | */ |
| 538 | orig_from_state = *orig_from_mode & state_mask; |
| 539 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 540 | dlog_verbose( |
| 541 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 542 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 543 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 544 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | /* Find the appropriate new mode. */ |
| 548 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 549 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 550 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | /** |
| 554 | * Verify that all pages have the same mode, that the starting mode |
| 555 | * constitutes a valid state and obtain the next mode to apply |
| 556 | * to the retrieving VM. |
| 557 | * |
| 558 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 559 | * 1) FFA_DENIED if a state transition was not found; |
| 560 | * 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] | 561 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 562 | * 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] | 563 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 564 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 565 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 566 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 567 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 568 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 569 | struct ffa_memory_region_constituent **fragments, |
| 570 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 571 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 572 | { |
| 573 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 574 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 575 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 576 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 577 | fragment_constituent_counts, |
| 578 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 579 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 580 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 581 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 582 | } |
| 583 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 584 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 585 | /* |
| 586 | * If the original ffa memory send call has been processed |
| 587 | * successfully, it is expected the orig_to_mode would overlay |
| 588 | * with `state_mask`, as a result of the function |
| 589 | * `ffa_send_check_transition`. |
| 590 | */ |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 591 | if (vm_id_is_current_world(to.vm->id)) { |
| 592 | assert((orig_to_mode & |
| 593 | (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 594 | MM_MODE_SHARED)) != 0U); |
| 595 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 596 | } else { |
| 597 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 598 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 599 | * Ensure the retriever has the expected state. We don't care |
| 600 | * about the MM_MODE_SHARED bit; either with or without it set |
| 601 | * are both valid representations of the !O-NA state. |
| 602 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 603 | if (vm_id_is_current_world(to.vm->id) && |
| 604 | to.vm->id != HF_PRIMARY_VM_ID && |
| 605 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 606 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 607 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 608 | } |
| 609 | } |
| 610 | |
| 611 | /* Find the appropriate new mode. */ |
| 612 | *to_mode = memory_to_attributes; |
| 613 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 614 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 615 | *to_mode |= 0; |
| 616 | break; |
| 617 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 618 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 619 | *to_mode |= MM_MODE_UNOWNED; |
| 620 | break; |
| 621 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 622 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 623 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 624 | break; |
| 625 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 626 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 627 | *to_mode |= 0; |
| 628 | break; |
| 629 | |
| 630 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 631 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 632 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 635 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 636 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 637 | |
| 638 | /** |
| 639 | * Updates a VM's page table such that the given set of physical address ranges |
| 640 | * are mapped in the address space at the corresponding address ranges, in the |
| 641 | * mode provided. |
| 642 | * |
| 643 | * If commit is false, the page tables will be allocated from the mpool but no |
| 644 | * mappings will actually be updated. This function must always be called first |
| 645 | * with commit false to check that it will succeed before calling with commit |
| 646 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 647 | * series of changes atomically you can call them all with commit false before |
| 648 | * calling them all with commit true. |
| 649 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 650 | * vm_ptable_defrag should always be called after a series of page table |
| 651 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 652 | * |
| 653 | * Returns true on success, or false if the update failed and no changes were |
| 654 | * made to memory mappings. |
| 655 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 656 | bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 657 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 658 | struct ffa_memory_region_constituent **fragments, |
| 659 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 660 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 661 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 662 | uint32_t i; |
| 663 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 664 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 665 | if (vm_locked.vm->el0_partition) { |
| 666 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 667 | } |
| 668 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 669 | /* Iterate over the memory region constituents within each fragment. */ |
| 670 | for (i = 0; i < fragment_count; ++i) { |
| 671 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 672 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 673 | paddr_t pa_begin = |
| 674 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 675 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 676 | uint32_t pa_bits = |
| 677 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 678 | |
| 679 | /* |
| 680 | * Ensure the requested region falls into system's PA |
| 681 | * range. |
| 682 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 683 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 684 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 685 | dlog_error("Region is outside of PA Range\n"); |
| 686 | return false; |
| 687 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 688 | |
| 689 | if (commit) { |
| 690 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 691 | mode, ppool, NULL); |
| 692 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 693 | pa_end, mode, ppool)) { |
| 694 | return false; |
| 695 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 696 | } |
| 697 | } |
| 698 | |
| 699 | return true; |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 704 | * flushed from the cache so the memory has been cleared across the system. |
| 705 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 706 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 707 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 708 | { |
| 709 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 710 | * 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] | 711 | * global mapping of the whole range. Such an approach will limit |
| 712 | * the changes to stage-1 tables and will allow only local |
| 713 | * invalidation. |
| 714 | */ |
| 715 | bool ret; |
| 716 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 717 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 718 | MM_MODE_W | (extra_mode_attributes & |
| 719 | plat_ffa_other_world_mode()), |
| 720 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 721 | size_t size = pa_difference(begin, end); |
| 722 | |
| 723 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 724 | goto fail; |
| 725 | } |
| 726 | |
| 727 | memset_s(ptr, size, 0, size); |
| 728 | arch_mm_flush_dcache(ptr, size); |
| 729 | mm_unmap(stage1_locked, begin, end, ppool); |
| 730 | |
| 731 | ret = true; |
| 732 | goto out; |
| 733 | |
| 734 | fail: |
| 735 | ret = false; |
| 736 | |
| 737 | out: |
| 738 | mm_unlock_stage1(&stage1_locked); |
| 739 | |
| 740 | return ret; |
| 741 | } |
| 742 | |
| 743 | /** |
| 744 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 745 | * flushed from the cache so the memory has been cleared across the system. |
| 746 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 747 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 748 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 749 | struct ffa_memory_region_constituent **fragments, |
| 750 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 751 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 752 | { |
| 753 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 754 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 755 | bool ret = false; |
| 756 | |
| 757 | /* |
| 758 | * Create a local pool so any freed memory can't be used by another |
| 759 | * thread. This is to ensure each constituent that is mapped can be |
| 760 | * unmapped again afterwards. |
| 761 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 762 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 763 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 764 | /* Iterate over the memory region constituents within each fragment. */ |
| 765 | for (i = 0; i < fragment_count; ++i) { |
| 766 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 767 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 768 | for (j = 0; j < fragment_constituent_counts[j]; ++j) { |
| 769 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 770 | paddr_t begin = |
| 771 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 772 | paddr_t end = pa_add(begin, size); |
| 773 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 774 | if (!clear_memory(begin, end, &local_page_pool, |
| 775 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 776 | /* |
| 777 | * api_clear_memory will defrag on failure, so |
| 778 | * no need to do it here. |
| 779 | */ |
| 780 | goto out; |
| 781 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 782 | } |
| 783 | } |
| 784 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 785 | ret = true; |
| 786 | |
| 787 | out: |
| 788 | mpool_fini(&local_page_pool); |
| 789 | return ret; |
| 790 | } |
| 791 | |
| 792 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 793 | * 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] | 794 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 795 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 796 | * |
| 797 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 798 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 799 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 800 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 801 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 802 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 803 | * 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] | 804 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 805 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 806 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 807 | struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 808 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 809 | struct ffa_memory_region_constituent **fragments, |
| 810 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 811 | uint32_t composite_total_page_count, uint32_t share_func, |
| 812 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 813 | struct mpool *page_pool, bool clear, uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 814 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 815 | uint32_t i; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 816 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 817 | uint32_t orig_from_mode; |
| 818 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 819 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 820 | struct ffa_value ret; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 821 | uint32_t constituents_total_page_count = 0; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 822 | |
| 823 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 824 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 825 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 826 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 827 | for (i = 0; i < fragment_count; ++i) { |
| 828 | if (!is_aligned(fragments[i], 8)) { |
| 829 | dlog_verbose("Constituents not aligned.\n"); |
| 830 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 831 | } |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 832 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 833 | constituents_total_page_count += |
| 834 | fragments[i][j].page_count; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | if (constituents_total_page_count != composite_total_page_count) { |
| 839 | dlog_verbose( |
| 840 | "Composite page count differs from calculated page " |
| 841 | "count from constituents.\n"); |
| 842 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 843 | } |
| 844 | |
| 845 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 846 | * Check if the state transition is lawful for the sender, ensure that |
| 847 | * all constituents of a memory region being shared are at the same |
| 848 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 849 | */ |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 850 | ret = ffa_send_check_transition(from_locked, share_func, receivers, |
| 851 | receivers_count, &orig_from_mode, |
| 852 | fragments, fragment_constituent_counts, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 853 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 854 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 855 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 856 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 857 | } |
| 858 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 859 | if (orig_from_mode_ret != NULL) { |
| 860 | *orig_from_mode_ret = orig_from_mode; |
| 861 | } |
| 862 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 863 | /* |
| 864 | * Create a local pool so any freed memory can't be used by another |
| 865 | * thread. This is to ensure the original mapping can be restored if the |
| 866 | * clear fails. |
| 867 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 868 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 869 | |
| 870 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 871 | * First reserve all required memory for the new page table entries |
| 872 | * without committing, to make sure the entire operation will succeed |
| 873 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 874 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 875 | if (!ffa_region_group_identity_map( |
| 876 | from_locked, fragments, fragment_constituent_counts, |
| 877 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 878 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 879 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 880 | goto out; |
| 881 | } |
| 882 | |
| 883 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 884 | * Update the mapping for the sender. This won't allocate because the |
| 885 | * transaction was already prepared above, but may free pages in the |
| 886 | * case that a whole block is being unmapped that was previously |
| 887 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 888 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 889 | CHECK(ffa_region_group_identity_map( |
| 890 | from_locked, fragments, fragment_constituent_counts, |
| 891 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 892 | |
| 893 | /* 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] | 894 | if (clear && |
| 895 | !ffa_clear_memory_constituents( |
| 896 | plat_ffa_owner_world_mode(from_locked.vm->id), fragments, |
| 897 | fragment_constituent_counts, fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 898 | /* |
| 899 | * On failure, roll back by returning memory to the sender. This |
| 900 | * may allocate pages which were previously freed into |
| 901 | * `local_page_pool` by the call above, but will never allocate |
| 902 | * more pages than that so can never fail. |
| 903 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 904 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 905 | from_locked, fragments, fragment_constituent_counts, |
| 906 | fragment_count, orig_from_mode, &local_page_pool, |
| 907 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 908 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 909 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 910 | goto out; |
| 911 | } |
| 912 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 913 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 914 | |
| 915 | out: |
| 916 | mpool_fini(&local_page_pool); |
| 917 | |
| 918 | /* |
| 919 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 920 | * error) or merging entries into blocks where possible (on success). |
| 921 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 922 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 923 | |
| 924 | return ret; |
| 925 | } |
| 926 | |
| 927 | /** |
| 928 | * Validates and maps memory shared from one VM to another. |
| 929 | * |
| 930 | * This function requires the calling context to hold the <to> lock. |
| 931 | * |
| 932 | * Returns: |
| 933 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 934 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 935 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 936 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 937 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 938 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 939 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 940 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 941 | struct vm_locked to_locked, ffa_vm_id_t from_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 942 | struct ffa_memory_region_constituent **fragments, |
| 943 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 944 | uint32_t memory_to_attributes, uint32_t share_func, bool clear, |
| 945 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 946 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 947 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 948 | uint32_t to_mode; |
| 949 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 950 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 951 | |
| 952 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 953 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 954 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 955 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 956 | for (i = 0; i < fragment_count; ++i) { |
| 957 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 958 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 959 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 960 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | /* |
| 964 | * Check if the state transition is lawful for the recipient, and ensure |
| 965 | * that all constituents of the memory region being retrieved are at the |
| 966 | * same state. |
| 967 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 968 | ret = ffa_retrieve_check_transition( |
| 969 | to_locked, share_func, fragments, fragment_constituent_counts, |
| 970 | fragment_count, memory_to_attributes, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 971 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 972 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 973 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 974 | } |
| 975 | |
| 976 | /* |
| 977 | * Create a local pool so any freed memory can't be used by another |
| 978 | * thread. This is to ensure the original mapping can be restored if the |
| 979 | * clear fails. |
| 980 | */ |
| 981 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 982 | |
| 983 | /* |
| 984 | * First reserve all required memory for the new page table entries in |
| 985 | * the recipient page tables without committing, to make sure the entire |
| 986 | * operation will succeed without exhausting the page pool. |
| 987 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 988 | if (!ffa_region_group_identity_map( |
| 989 | to_locked, fragments, fragment_constituent_counts, |
| 990 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 991 | /* TODO: partial defrag of failed range. */ |
| 992 | dlog_verbose( |
| 993 | "Insufficient memory to update recipient page " |
| 994 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 995 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 996 | goto out; |
| 997 | } |
| 998 | |
| 999 | /* 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] | 1000 | if (clear && |
| 1001 | !ffa_clear_memory_constituents( |
| 1002 | plat_ffa_owner_world_mode(from_id), fragments, |
| 1003 | fragment_constituent_counts, fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1004 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1005 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1006 | goto out; |
| 1007 | } |
| 1008 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1009 | /* |
| 1010 | * Complete the transfer by mapping the memory into the recipient. This |
| 1011 | * won't allocate because the transaction was already prepared above, so |
| 1012 | * it doesn't need to use the `local_page_pool`. |
| 1013 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1014 | CHECK(ffa_region_group_identity_map( |
| 1015 | to_locked, fragments, fragment_constituent_counts, |
| 1016 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1017 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1018 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1019 | |
| 1020 | out: |
| 1021 | mpool_fini(&local_page_pool); |
| 1022 | |
| 1023 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1024 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1025 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1026 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1027 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1028 | |
| 1029 | return ret; |
| 1030 | } |
| 1031 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1032 | static struct ffa_value ffa_relinquish_check_update( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 1033 | struct vm_locked from_locked, ffa_vm_id_t owner_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1034 | struct ffa_memory_region_constituent **fragments, |
| 1035 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1036 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1037 | { |
| 1038 | uint32_t orig_from_mode; |
| 1039 | uint32_t from_mode; |
| 1040 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1041 | struct ffa_value ret; |
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 | ret = ffa_relinquish_check_transition( |
| 1044 | from_locked, &orig_from_mode, fragments, |
| 1045 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1046 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1047 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1048 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | /* |
| 1052 | * Create a local pool so any freed memory can't be used by another |
| 1053 | * thread. This is to ensure the original mapping can be restored if the |
| 1054 | * clear fails. |
| 1055 | */ |
| 1056 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1057 | |
| 1058 | /* |
| 1059 | * First reserve all required memory for the new page table entries |
| 1060 | * without committing, to make sure the entire operation will succeed |
| 1061 | * without exhausting the page pool. |
| 1062 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1063 | if (!ffa_region_group_identity_map( |
| 1064 | from_locked, fragments, fragment_constituent_counts, |
| 1065 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1066 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1067 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1068 | goto out; |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * Update the mapping for the sender. This won't allocate because the |
| 1073 | * transaction was already prepared above, but may free pages in the |
| 1074 | * case that a whole block is being unmapped that was previously |
| 1075 | * partially mapped. |
| 1076 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1077 | CHECK(ffa_region_group_identity_map( |
| 1078 | from_locked, fragments, fragment_constituent_counts, |
| 1079 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1080 | |
| 1081 | /* 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] | 1082 | if (clear && |
| 1083 | !ffa_clear_memory_constituents( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 1084 | plat_ffa_owner_world_mode(owner_id), fragments, |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 1085 | fragment_constituent_counts, fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1086 | /* |
| 1087 | * On failure, roll back by returning memory to the sender. This |
| 1088 | * may allocate pages which were previously freed into |
| 1089 | * `local_page_pool` by the call above, but will never allocate |
| 1090 | * more pages than that so can never fail. |
| 1091 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1092 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1093 | from_locked, fragments, fragment_constituent_counts, |
| 1094 | fragment_count, orig_from_mode, &local_page_pool, |
| 1095 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1096 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1097 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1098 | goto out; |
| 1099 | } |
| 1100 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1101 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1102 | |
| 1103 | out: |
| 1104 | mpool_fini(&local_page_pool); |
| 1105 | |
| 1106 | /* |
| 1107 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1108 | * error) or merging entries into blocks where possible (on success). |
| 1109 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1110 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1111 | |
| 1112 | return ret; |
| 1113 | } |
| 1114 | |
| 1115 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1116 | * Complete a memory sending operation by checking that it is valid, updating |
| 1117 | * the sender page table, and then either marking the share state as having |
| 1118 | * completed sending (on success) or freeing it (on failure). |
| 1119 | * |
| 1120 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1121 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1122 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1123 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1124 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1125 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1126 | { |
| 1127 | struct ffa_memory_region *memory_region = share_state->memory_region; |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 1128 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1129 | struct ffa_value ret; |
| 1130 | |
| 1131 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1132 | assert(share_states.share_states != NULL); |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 1133 | assert(memory_region != NULL); |
| 1134 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1135 | assert(composite != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1136 | |
| 1137 | /* Check that state is valid in sender page table and update. */ |
| 1138 | ret = ffa_send_check_update( |
| 1139 | from_locked, share_state->fragments, |
| 1140 | share_state->fragment_constituent_counts, |
J-Alves | 8f11cde | 2022-12-21 16:18:22 +0000 | [diff] [blame^] | 1141 | share_state->fragment_count, composite->page_count, |
| 1142 | share_state->share_func, memory_region->receivers, |
| 1143 | memory_region->receiver_count, page_pool, |
| 1144 | memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1145 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1146 | if (ret.func != FFA_SUCCESS_32) { |
| 1147 | /* |
| 1148 | * Free share state, it failed to send so it can't be retrieved. |
| 1149 | */ |
| 1150 | dlog_verbose("Complete failed, freeing share state.\n"); |
| 1151 | share_state_free(share_states, share_state, page_pool); |
| 1152 | return ret; |
| 1153 | } |
| 1154 | |
| 1155 | share_state->sending_complete = true; |
| 1156 | dlog_verbose("Marked sending complete.\n"); |
| 1157 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1158 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1159 | } |
| 1160 | |
| 1161 | /** |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1162 | * Check that the memory attributes match Hafnium expectations: |
| 1163 | * Normal Memory, Inner shareable, Write-Back Read-Allocate |
| 1164 | * Write-Allocate Cacheable. |
| 1165 | */ |
| 1166 | static struct ffa_value ffa_memory_attributes_validate( |
J-Alves | 7a99d0d | 2023-02-08 13:49:48 +0000 | [diff] [blame] | 1167 | ffa_memory_attributes_t attributes) |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1168 | { |
| 1169 | enum ffa_memory_type memory_type; |
| 1170 | enum ffa_memory_cacheability cacheability; |
| 1171 | enum ffa_memory_shareability shareability; |
| 1172 | |
| 1173 | memory_type = ffa_get_memory_type_attr(attributes); |
| 1174 | if (memory_type != FFA_MEMORY_NORMAL_MEM) { |
| 1175 | dlog_verbose("Invalid memory type %#x, expected %#x.\n", |
| 1176 | memory_type, FFA_MEMORY_NORMAL_MEM); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1177 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1178 | } |
| 1179 | |
| 1180 | cacheability = ffa_get_memory_cacheability_attr(attributes); |
| 1181 | if (cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1182 | dlog_verbose("Invalid cacheability %#x, expected %#x.\n", |
| 1183 | cacheability, FFA_MEMORY_CACHE_WRITE_BACK); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1184 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1185 | } |
| 1186 | |
| 1187 | shareability = ffa_get_memory_shareability_attr(attributes); |
| 1188 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
| 1189 | dlog_verbose("Invalid shareability %#x, expected #%x.\n", |
| 1190 | shareability, FFA_MEMORY_INNER_SHAREABLE); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1191 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1192 | } |
| 1193 | |
| 1194 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1195 | } |
| 1196 | |
| 1197 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1198 | * Check that the given `memory_region` represents a valid memory send request |
| 1199 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1200 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1201 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1202 | * 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] | 1203 | * not. |
| 1204 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1205 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1206 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1207 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1208 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1209 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1210 | struct ffa_composite_memory_region *composite; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1211 | uint64_t receivers_end; |
| 1212 | uint64_t min_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1213 | uint32_t composite_memory_region_offset; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1214 | uint32_t constituents_start; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1215 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1216 | enum ffa_data_access data_access; |
| 1217 | enum ffa_instruction_access instruction_access; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1218 | enum ffa_memory_security security_state; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1219 | struct ffa_value ret; |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1220 | const size_t minimum_first_fragment_length = |
| 1221 | (sizeof(struct ffa_memory_region) + |
| 1222 | sizeof(struct ffa_memory_access) + |
| 1223 | sizeof(struct ffa_composite_memory_region)); |
| 1224 | |
| 1225 | if (fragment_length < minimum_first_fragment_length) { |
| 1226 | dlog_verbose("Fragment length %u too short (min %u).\n", |
| 1227 | (size_t)fragment_length, |
| 1228 | minimum_first_fragment_length); |
| 1229 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1230 | } |
| 1231 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1232 | static_assert(sizeof(struct ffa_memory_region_constituent) == 16, |
| 1233 | "struct ffa_memory_region_constituent must be 16 bytes"); |
| 1234 | if (!is_aligned(fragment_length, |
| 1235 | sizeof(struct ffa_memory_region_constituent)) || |
| 1236 | !is_aligned(memory_share_length, |
| 1237 | sizeof(struct ffa_memory_region_constituent))) { |
| 1238 | dlog_verbose( |
| 1239 | "Fragment length %u or total length %u" |
| 1240 | " is not 16-byte aligned.\n", |
| 1241 | fragment_length, memory_share_length); |
| 1242 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1243 | } |
| 1244 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1245 | if (fragment_length > memory_share_length) { |
| 1246 | dlog_verbose( |
| 1247 | "Fragment length %u greater than total length %u.\n", |
| 1248 | (size_t)fragment_length, (size_t)memory_share_length); |
| 1249 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1250 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1251 | |
J-Alves | 0b6653d | 2022-04-22 13:17:38 +0100 | [diff] [blame] | 1252 | assert(memory_region->receivers_offset == |
| 1253 | offsetof(struct ffa_memory_region, receivers)); |
| 1254 | assert(memory_region->memory_access_desc_size == |
| 1255 | sizeof(struct ffa_memory_access)); |
| 1256 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1257 | /* The sender must match the caller. */ |
| 1258 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1259 | vm_id_is_current_world(memory_region->sender)) || |
| 1260 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1261 | memory_region->sender != from_locked.vm->id)) { |
| 1262 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1263 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1264 | } |
| 1265 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1266 | if (memory_region->receiver_count <= 0) { |
| 1267 | dlog_verbose("No receivers!\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1268 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1269 | } |
| 1270 | |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1271 | /* |
| 1272 | * Ensure that the composite header is within the memory bounds and |
| 1273 | * doesn't overlap the first part of the message. Cast to uint64_t |
| 1274 | * to prevent overflow. |
| 1275 | */ |
| 1276 | receivers_end = ((uint64_t)sizeof(struct ffa_memory_access) * |
| 1277 | (uint64_t)memory_region->receiver_count) + |
| 1278 | sizeof(struct ffa_memory_region); |
| 1279 | min_length = receivers_end + |
| 1280 | sizeof(struct ffa_composite_memory_region) + |
| 1281 | sizeof(struct ffa_memory_region_constituent); |
| 1282 | if (min_length > memory_share_length) { |
| 1283 | dlog_verbose("Share too short: got %u but minimum is %u.\n", |
| 1284 | (size_t)memory_share_length, (size_t)min_length); |
| 1285 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1286 | } |
| 1287 | |
| 1288 | composite_memory_region_offset = |
| 1289 | memory_region->receivers[0].composite_memory_region_offset; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1290 | |
| 1291 | /* |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1292 | * Check that the composite memory region descriptor is after the access |
| 1293 | * descriptors, is at least 16-byte aligned, and fits in the first |
| 1294 | * fragment. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1295 | */ |
Demi Marie Obenour | d467741 | 2023-02-03 20:35:12 -0500 | [diff] [blame] | 1296 | if ((composite_memory_region_offset < receivers_end) || |
| 1297 | (composite_memory_region_offset % 16 != 0) || |
| 1298 | (composite_memory_region_offset > |
| 1299 | fragment_length - sizeof(struct ffa_composite_memory_region))) { |
| 1300 | dlog_verbose( |
| 1301 | "Invalid composite memory region descriptor offset " |
| 1302 | "%u.\n", |
| 1303 | (size_t)composite_memory_region_offset); |
| 1304 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1305 | } |
| 1306 | |
| 1307 | /* |
| 1308 | * Compute the start of the constituent regions. Already checked |
| 1309 | * to be not more than fragment_length and thus not more than |
| 1310 | * memory_share_length. |
| 1311 | */ |
| 1312 | constituents_start = composite_memory_region_offset + |
| 1313 | sizeof(struct ffa_composite_memory_region); |
| 1314 | constituents_length = memory_share_length - constituents_start; |
| 1315 | |
| 1316 | /* |
| 1317 | * Check that the number of constituents is consistent with the length |
| 1318 | * of the constituent region. |
| 1319 | */ |
| 1320 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 1321 | if ((constituents_length % |
| 1322 | sizeof(struct ffa_memory_region_constituent) != |
| 1323 | 0) || |
| 1324 | ((constituents_length / |
| 1325 | sizeof(struct ffa_memory_region_constituent)) != |
| 1326 | composite->constituent_count)) { |
| 1327 | dlog_verbose("Invalid length %u or composite offset %u.\n", |
| 1328 | (size_t)memory_share_length, |
| 1329 | (size_t)composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1330 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1331 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1332 | if (fragment_length < memory_share_length && |
| 1333 | fragment_length < HF_MAILBOX_SIZE) { |
| 1334 | dlog_warning( |
| 1335 | "Initial fragment length %d smaller than mailbox " |
| 1336 | "size.\n", |
| 1337 | fragment_length); |
| 1338 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1339 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1340 | /* |
| 1341 | * Clear is not allowed for memory sharing, as the sender still has |
| 1342 | * access to the memory. |
| 1343 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1344 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1345 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1346 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1347 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1348 | } |
| 1349 | |
| 1350 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1351 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1352 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1353 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1354 | } |
| 1355 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1356 | /* Check that the permissions are valid, for each specified receiver. */ |
| 1357 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
| 1358 | ffa_memory_access_permissions_t permissions = |
| 1359 | memory_region->receivers[i] |
| 1360 | .receiver_permissions.permissions; |
| 1361 | ffa_vm_id_t receiver_id = |
| 1362 | memory_region->receivers[i] |
| 1363 | .receiver_permissions.receiver; |
| 1364 | |
| 1365 | if (memory_region->sender == receiver_id) { |
| 1366 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1367 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1368 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 1369 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1370 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 1371 | j++) { |
| 1372 | if (receiver_id == |
| 1373 | memory_region->receivers[j] |
| 1374 | .receiver_permissions.receiver) { |
| 1375 | dlog_verbose( |
| 1376 | "Repeated receiver(%x) in memory send " |
| 1377 | "operation.\n", |
| 1378 | memory_region->receivers[j] |
| 1379 | .receiver_permissions.receiver); |
| 1380 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | if (composite_memory_region_offset != |
| 1385 | memory_region->receivers[i] |
| 1386 | .composite_memory_region_offset) { |
| 1387 | dlog_verbose( |
| 1388 | "All ffa_memory_access should point to the " |
| 1389 | "same composite memory region offset.\n"); |
| 1390 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1391 | } |
| 1392 | |
| 1393 | data_access = ffa_get_data_access_attr(permissions); |
| 1394 | instruction_access = |
| 1395 | ffa_get_instruction_access_attr(permissions); |
| 1396 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1397 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 1398 | dlog_verbose( |
| 1399 | "Reserved value for receiver permissions " |
| 1400 | "%#x.\n", |
| 1401 | permissions); |
| 1402 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1403 | } |
| 1404 | if (instruction_access != |
| 1405 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 1406 | dlog_verbose( |
| 1407 | "Invalid instruction access permissions %#x " |
| 1408 | "for sending memory.\n", |
| 1409 | permissions); |
| 1410 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1411 | } |
| 1412 | if (share_func == FFA_MEM_SHARE_32) { |
| 1413 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1414 | dlog_verbose( |
| 1415 | "Invalid data access permissions %#x " |
| 1416 | "for sharing memory.\n", |
| 1417 | permissions); |
| 1418 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1419 | } |
| 1420 | /* |
| 1421 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 1422 | * spec, NX is required for share operations (but must |
| 1423 | * not be specified by the sender) so set it in the |
| 1424 | * copy that we store, ready to be returned to the |
| 1425 | * retriever. |
| 1426 | */ |
J-Alves | b19731a | 2022-06-20 17:30:33 +0100 | [diff] [blame] | 1427 | if (vm_id_is_current_world(receiver_id)) { |
| 1428 | ffa_set_instruction_access_attr( |
| 1429 | &permissions, |
| 1430 | FFA_INSTRUCTION_ACCESS_NX); |
| 1431 | memory_region->receivers[i] |
| 1432 | .receiver_permissions.permissions = |
| 1433 | permissions; |
| 1434 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1435 | } |
| 1436 | if (share_func == FFA_MEM_LEND_32 && |
| 1437 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1438 | dlog_verbose( |
| 1439 | "Invalid data access permissions %#x for " |
| 1440 | "lending memory.\n", |
| 1441 | permissions); |
| 1442 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1443 | } |
| 1444 | |
| 1445 | if (share_func == FFA_MEM_DONATE_32 && |
| 1446 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1447 | dlog_verbose( |
| 1448 | "Invalid data access permissions %#x for " |
| 1449 | "donating memory.\n", |
| 1450 | permissions); |
| 1451 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1452 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1453 | } |
| 1454 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 1455 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_SHARE/LEND/DONATE. */ |
| 1456 | security_state = |
| 1457 | ffa_get_memory_security_attr(memory_region->attributes); |
| 1458 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 1459 | dlog_verbose( |
| 1460 | "Invalid security state for memory share operation.\n"); |
| 1461 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1462 | } |
| 1463 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1464 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1465 | * If a memory donate or lend with single borrower, the memory type |
| 1466 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1467 | */ |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1468 | if (share_func == FFA_MEM_DONATE_32 || |
| 1469 | (share_func == FFA_MEM_LEND_32 && |
| 1470 | memory_region->receiver_count == 1)) { |
| 1471 | if (ffa_get_memory_type_attr(memory_region->attributes) != |
| 1472 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 1473 | dlog_verbose( |
| 1474 | "Memory type shall not be specified by " |
| 1475 | "sender.\n"); |
| 1476 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1477 | } |
| 1478 | } else { |
| 1479 | /* |
| 1480 | * Check that sender's memory attributes match Hafnium |
| 1481 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 1482 | * Read-Allocate Write-Allocate Cacheable. |
| 1483 | */ |
| 1484 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 1485 | if (ret.func != FFA_SUCCESS_32) { |
| 1486 | return ret; |
| 1487 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1488 | } |
| 1489 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1490 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1491 | } |
| 1492 | |
| 1493 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1494 | * Gets the share state for continuing an operation to donate, lend or share |
| 1495 | * memory, and checks that it is a valid request. |
| 1496 | * |
| 1497 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1498 | * not. |
| 1499 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1500 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1501 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
| 1502 | struct ffa_memory_share_state **share_state_ret, ffa_vm_id_t from_vm_id, |
| 1503 | struct mpool *page_pool) |
| 1504 | { |
| 1505 | struct ffa_memory_share_state *share_state; |
| 1506 | struct ffa_memory_region *memory_region; |
| 1507 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1508 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1509 | |
| 1510 | /* |
| 1511 | * Look up the share state by handle and make sure that the VM ID |
| 1512 | * matches. |
| 1513 | */ |
| 1514 | if (!get_share_state(share_states, handle, &share_state)) { |
| 1515 | dlog_verbose( |
| 1516 | "Invalid handle %#x for memory send continuation.\n", |
| 1517 | handle); |
| 1518 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1519 | } |
| 1520 | memory_region = share_state->memory_region; |
| 1521 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1522 | if (vm_id_is_current_world(from_vm_id) && |
| 1523 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1524 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1525 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1526 | } |
| 1527 | |
| 1528 | if (share_state->sending_complete) { |
| 1529 | dlog_verbose( |
| 1530 | "Sending of memory handle %#x is already complete.\n", |
| 1531 | handle); |
| 1532 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1533 | } |
| 1534 | |
| 1535 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1536 | /* |
| 1537 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1538 | * probably be increased. |
| 1539 | */ |
| 1540 | dlog_warning( |
| 1541 | "Too many fragments for memory share with handle %#x; " |
| 1542 | "only %d supported.\n", |
| 1543 | handle, MAX_FRAGMENTS); |
| 1544 | /* Free share state, as it's not possible to complete it. */ |
| 1545 | share_state_free(share_states, share_state, page_pool); |
| 1546 | return ffa_error(FFA_NO_MEMORY); |
| 1547 | } |
| 1548 | |
| 1549 | *share_state_ret = share_state; |
| 1550 | |
| 1551 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1552 | } |
| 1553 | |
| 1554 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1555 | * Checks if there is at least one receiver from the other world. |
| 1556 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1557 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1558 | struct ffa_memory_region *memory_region) |
| 1559 | { |
| 1560 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 1561 | ffa_vm_id_t receiver = memory_region->receivers[i] |
| 1562 | .receiver_permissions.receiver; |
| 1563 | if (!vm_id_is_current_world(receiver)) { |
| 1564 | return true; |
| 1565 | } |
| 1566 | } |
| 1567 | return false; |
| 1568 | } |
| 1569 | |
| 1570 | /** |
J-Alves | 9da280b | 2022-12-21 14:55:39 +0000 | [diff] [blame] | 1571 | * Validates a call to donate, lend or share memory in which Hafnium is the |
| 1572 | * designated allocator of the memory handle. In practice, this also means |
| 1573 | * Hafnium is responsible for managing the state structures for the transaction. |
| 1574 | * If Hafnium is the SPMC, it should allocate the memory handle when either the |
| 1575 | * sender is an SP or there is at least one borrower that is an SP. |
| 1576 | * If Hafnium is the hypervisor, it should allocate the memory handle when |
| 1577 | * operation involves only NWd VMs. |
| 1578 | * |
| 1579 | * If validation goes well, Hafnium updates the stage-2 page tables of the |
| 1580 | * sender. Validation consists of checking if the message length and number of |
| 1581 | * memory region constituents match, and if the transition is valid for the |
| 1582 | * type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1583 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1584 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1585 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1586 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1587 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1588 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1589 | * This function takes ownership of the `memory_region` passed in and will free |
| 1590 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1591 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1592 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1593 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1594 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1595 | uint32_t fragment_length, uint32_t share_func, |
| 1596 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1597 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1598 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1599 | struct share_states_locked share_states; |
| 1600 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1601 | |
| 1602 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1603 | * If there is an error validating the `memory_region` then we need to |
| 1604 | * free it because we own it but we won't be storing it in a share state |
| 1605 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1606 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1607 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1608 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1609 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1610 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1611 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1612 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1613 | } |
| 1614 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1615 | /* Set flag for share function, ready to be retrieved later. */ |
| 1616 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1617 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1618 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1619 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1620 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1621 | case FFA_MEM_LEND_32: |
| 1622 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1623 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1624 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1625 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1626 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1627 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1628 | } |
| 1629 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1630 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1631 | /* |
| 1632 | * Allocate a share state before updating the page table. Otherwise if |
| 1633 | * updating the page table succeeded but allocating the share state |
| 1634 | * failed then it would leave the memory in a state where nobody could |
| 1635 | * get it back. |
| 1636 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1637 | if (!allocate_share_state(share_states, share_func, memory_region, |
| 1638 | fragment_length, FFA_MEMORY_HANDLE_INVALID, |
| 1639 | &share_state)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1640 | dlog_verbose("Failed to allocate share state.\n"); |
| 1641 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1642 | ret = ffa_error(FFA_NO_MEMORY); |
| 1643 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1644 | } |
| 1645 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1646 | if (fragment_length == memory_share_length) { |
| 1647 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1648 | ret = ffa_memory_send_complete( |
| 1649 | from_locked, share_states, share_state, page_pool, |
| 1650 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1651 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1652 | /* |
| 1653 | * Use sender ID from 'memory_region' assuming |
| 1654 | * that at this point it has been validated: |
| 1655 | * - MBZ at virtual FF-A instance. |
| 1656 | */ |
| 1657 | ffa_vm_id_t sender_to_ret = |
| 1658 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 1659 | ? memory_region->sender |
| 1660 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1661 | ret = (struct ffa_value){ |
| 1662 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1663 | .arg1 = (uint32_t)memory_region->handle, |
| 1664 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame] | 1665 | .arg3 = fragment_length, |
| 1666 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1667 | } |
| 1668 | |
| 1669 | out: |
| 1670 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1671 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1672 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1673 | } |
| 1674 | |
| 1675 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1676 | * Continues an operation to donate, lend or share memory to a VM from current |
| 1677 | * world. If this is the last fragment then checks that the transition is valid |
| 1678 | * for the type of memory sending operation and updates the stage-2 page tables |
| 1679 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1680 | * |
| 1681 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1682 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1683 | * allocated page from Hafnium's internal pool. |
| 1684 | * |
| 1685 | * This function takes ownership of the `fragment` passed in; it must not be |
| 1686 | * freed by the caller. |
| 1687 | */ |
| 1688 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 1689 | void *fragment, |
| 1690 | uint32_t fragment_length, |
| 1691 | ffa_memory_handle_t handle, |
| 1692 | struct mpool *page_pool) |
| 1693 | { |
| 1694 | struct share_states_locked share_states = share_states_lock(); |
| 1695 | struct ffa_memory_share_state *share_state; |
| 1696 | struct ffa_value ret; |
| 1697 | struct ffa_memory_region *memory_region; |
| 1698 | |
Demi Marie Obenour | 73a1e94 | 2023-02-04 14:09:18 -0500 | [diff] [blame] | 1699 | CHECK(is_aligned(fragment, |
| 1700 | alignof(struct ffa_memory_region_constituent))); |
| 1701 | if (fragment_length % sizeof(struct ffa_memory_region_constituent) != |
| 1702 | 0) { |
| 1703 | dlog_verbose("Fragment length %u misaligned.\n", |
| 1704 | fragment_length); |
| 1705 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1706 | goto out_free_fragment; |
| 1707 | } |
| 1708 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1709 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1710 | &share_state, |
| 1711 | from_locked.vm->id, page_pool); |
| 1712 | if (ret.func != FFA_SUCCESS_32) { |
| 1713 | goto out_free_fragment; |
| 1714 | } |
| 1715 | memory_region = share_state->memory_region; |
| 1716 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1717 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1718 | dlog_error( |
| 1719 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1720 | "other world. This should never happen, and indicates " |
| 1721 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1722 | "EL3 code.\n"); |
| 1723 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1724 | goto out_free_fragment; |
| 1725 | } |
| 1726 | |
| 1727 | /* Add this fragment. */ |
| 1728 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1729 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1730 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1731 | share_state->fragment_count++; |
| 1732 | |
| 1733 | /* Check whether the memory send operation is now ready to complete. */ |
| 1734 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1735 | ret = ffa_memory_send_complete( |
| 1736 | from_locked, share_states, share_state, page_pool, |
| 1737 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1738 | } else { |
| 1739 | ret = (struct ffa_value){ |
| 1740 | .func = FFA_MEM_FRAG_RX_32, |
| 1741 | .arg1 = (uint32_t)handle, |
| 1742 | .arg2 = (uint32_t)(handle >> 32), |
| 1743 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1744 | share_state)}; |
| 1745 | } |
| 1746 | goto out; |
| 1747 | |
| 1748 | out_free_fragment: |
| 1749 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1750 | |
| 1751 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1752 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1753 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1754 | } |
| 1755 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1756 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 1757 | static void ffa_memory_retrieve_complete( |
| 1758 | struct share_states_locked share_states, |
| 1759 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 1760 | { |
| 1761 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 1762 | /* |
| 1763 | * Memory that has been donated can't be relinquished, |
| 1764 | * so no need to keep the share state around. |
| 1765 | */ |
| 1766 | share_state_free(share_states, share_state, page_pool); |
| 1767 | dlog_verbose("Freed share state for donate.\n"); |
| 1768 | } |
| 1769 | } |
| 1770 | |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1771 | /** |
| 1772 | * Initialises the given memory region descriptor to be used for an |
| 1773 | * `FFA_MEM_RETRIEVE_RESP`, including the given constituents for the first |
| 1774 | * fragment. |
| 1775 | * The memory region descriptor is initialized according to retriever's |
| 1776 | * FF-A version. |
| 1777 | * |
| 1778 | * Returns true on success, or false if the given constituents won't all fit in |
| 1779 | * the first fragment. |
| 1780 | */ |
| 1781 | static bool ffa_retrieved_memory_region_init( |
| 1782 | void *response, uint32_t ffa_version, size_t response_max_size, |
| 1783 | ffa_vm_id_t sender, ffa_memory_attributes_t attributes, |
| 1784 | ffa_memory_region_flags_t flags, ffa_memory_handle_t handle, |
| 1785 | ffa_vm_id_t receiver_id, ffa_memory_access_permissions_t permissions, |
| 1786 | uint32_t page_count, uint32_t total_constituent_count, |
| 1787 | const struct ffa_memory_region_constituent constituents[], |
| 1788 | uint32_t fragment_constituent_count, uint32_t *total_length, |
| 1789 | uint32_t *fragment_length) |
| 1790 | { |
| 1791 | struct ffa_composite_memory_region *composite_memory_region; |
| 1792 | struct ffa_memory_access *receiver; |
| 1793 | uint32_t i; |
| 1794 | uint32_t constituents_offset; |
| 1795 | uint32_t receiver_count; |
| 1796 | |
| 1797 | assert(response != NULL); |
| 1798 | |
| 1799 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1800 | struct ffa_memory_region_v1_0 *retrieve_response = |
| 1801 | (struct ffa_memory_region_v1_0 *)response; |
| 1802 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 1803 | ffa_memory_region_init_header_v1_0( |
| 1804 | retrieve_response, sender, attributes, flags, handle, 0, |
| 1805 | RECEIVERS_COUNT_IN_RETRIEVE_RESP); |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 1806 | |
| 1807 | receiver = &retrieve_response->receivers[0]; |
| 1808 | receiver_count = retrieve_response->receiver_count; |
| 1809 | |
| 1810 | receiver->composite_memory_region_offset = |
| 1811 | sizeof(struct ffa_memory_region_v1_0) + |
| 1812 | receiver_count * sizeof(struct ffa_memory_access); |
| 1813 | |
| 1814 | composite_memory_region = ffa_memory_region_get_composite_v1_0( |
| 1815 | retrieve_response, 0); |
| 1816 | } else { |
| 1817 | /* Default to FF-A v1.1 version. */ |
| 1818 | struct ffa_memory_region *retrieve_response = |
| 1819 | (struct ffa_memory_region *)response; |
| 1820 | |
| 1821 | ffa_memory_region_init_header(retrieve_response, sender, |
| 1822 | attributes, flags, handle, 0, 1); |
| 1823 | |
| 1824 | receiver = &retrieve_response->receivers[0]; |
| 1825 | receiver_count = retrieve_response->receiver_count; |
| 1826 | |
| 1827 | /* |
| 1828 | * Note that `sizeof(struct_ffa_memory_region)` and |
| 1829 | * `sizeof(struct ffa_memory_access)` must both be multiples of |
| 1830 | * 16 (as verified by the asserts in `ffa_memory.c`, so it is |
| 1831 | * guaranteed that the offset we calculate here is aligned to a |
| 1832 | * 64-bit boundary and so 64-bit values can be copied without |
| 1833 | * alignment faults. |
| 1834 | */ |
| 1835 | receiver->composite_memory_region_offset = |
| 1836 | sizeof(struct ffa_memory_region) + |
| 1837 | receiver_count * sizeof(struct ffa_memory_access); |
| 1838 | |
| 1839 | composite_memory_region = |
| 1840 | ffa_memory_region_get_composite(retrieve_response, 0); |
| 1841 | } |
| 1842 | |
| 1843 | assert(receiver != NULL); |
| 1844 | assert(composite_memory_region != NULL); |
| 1845 | |
| 1846 | /* |
| 1847 | * Initialized here as in memory retrieve responses we currently expect |
| 1848 | * one borrower to be specified. |
| 1849 | */ |
| 1850 | ffa_memory_access_init_permissions(receiver, receiver_id, 0, 0, flags); |
| 1851 | receiver->receiver_permissions.permissions = permissions; |
| 1852 | |
| 1853 | composite_memory_region->page_count = page_count; |
| 1854 | composite_memory_region->constituent_count = total_constituent_count; |
| 1855 | composite_memory_region->reserved_0 = 0; |
| 1856 | |
| 1857 | constituents_offset = receiver->composite_memory_region_offset + |
| 1858 | sizeof(struct ffa_composite_memory_region); |
| 1859 | if (constituents_offset + |
| 1860 | fragment_constituent_count * |
| 1861 | sizeof(struct ffa_memory_region_constituent) > |
| 1862 | response_max_size) { |
| 1863 | return false; |
| 1864 | } |
| 1865 | |
| 1866 | for (i = 0; i < fragment_constituent_count; ++i) { |
| 1867 | composite_memory_region->constituents[i] = constituents[i]; |
| 1868 | } |
| 1869 | |
| 1870 | if (total_length != NULL) { |
| 1871 | *total_length = |
| 1872 | constituents_offset + |
| 1873 | composite_memory_region->constituent_count * |
| 1874 | sizeof(struct ffa_memory_region_constituent); |
| 1875 | } |
| 1876 | if (fragment_length != NULL) { |
| 1877 | *fragment_length = |
| 1878 | constituents_offset + |
| 1879 | fragment_constituent_count * |
| 1880 | sizeof(struct ffa_memory_region_constituent); |
| 1881 | } |
| 1882 | |
| 1883 | return true; |
| 1884 | } |
| 1885 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1886 | /* |
| 1887 | * Gets the receiver's access permissions from 'struct ffa_memory_region' and |
| 1888 | * returns its index in the receiver's array. If receiver's ID doesn't exist |
| 1889 | * in the array, return the region's 'receiver_count'. |
| 1890 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1891 | uint32_t ffa_memory_region_get_receiver(struct ffa_memory_region *memory_region, |
| 1892 | ffa_vm_id_t receiver) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1893 | { |
| 1894 | struct ffa_memory_access *receivers; |
| 1895 | uint32_t i; |
| 1896 | |
| 1897 | assert(memory_region != NULL); |
| 1898 | |
| 1899 | receivers = memory_region->receivers; |
| 1900 | |
| 1901 | for (i = 0U; i < memory_region->receiver_count; i++) { |
| 1902 | if (receivers[i].receiver_permissions.receiver == receiver) { |
| 1903 | break; |
| 1904 | } |
| 1905 | } |
| 1906 | |
| 1907 | return i; |
| 1908 | } |
| 1909 | |
| 1910 | /** |
| 1911 | * Validates the retrieved permissions against those specified by the lender |
| 1912 | * of memory share operation. Optionally can help set the permissions to be used |
| 1913 | * for the S2 mapping, through the `permissions` argument. |
| 1914 | * Returns true if permissions are valid, false otherwise. |
| 1915 | */ |
| 1916 | static bool ffa_memory_retrieve_is_memory_access_valid( |
| 1917 | enum ffa_data_access sent_data_access, |
| 1918 | enum ffa_data_access requested_data_access, |
| 1919 | enum ffa_instruction_access sent_instruction_access, |
| 1920 | enum ffa_instruction_access requested_instruction_access, |
| 1921 | ffa_memory_access_permissions_t *permissions) |
| 1922 | { |
| 1923 | switch (sent_data_access) { |
| 1924 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 1925 | case FFA_DATA_ACCESS_RW: |
| 1926 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 1927 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 1928 | if (permissions != NULL) { |
| 1929 | ffa_set_data_access_attr(permissions, |
| 1930 | FFA_DATA_ACCESS_RW); |
| 1931 | } |
| 1932 | break; |
| 1933 | } |
| 1934 | /* Intentional fall-through. */ |
| 1935 | case FFA_DATA_ACCESS_RO: |
| 1936 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 1937 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 1938 | if (permissions != NULL) { |
| 1939 | ffa_set_data_access_attr(permissions, |
| 1940 | FFA_DATA_ACCESS_RO); |
| 1941 | } |
| 1942 | break; |
| 1943 | } |
| 1944 | dlog_verbose( |
| 1945 | "Invalid data access requested; sender specified " |
| 1946 | "permissions %#x but receiver requested %#x.\n", |
| 1947 | sent_data_access, requested_data_access); |
| 1948 | return false; |
| 1949 | case FFA_DATA_ACCESS_RESERVED: |
| 1950 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 1951 | "checked before this point."); |
| 1952 | } |
| 1953 | |
| 1954 | switch (sent_instruction_access) { |
| 1955 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 1956 | case FFA_INSTRUCTION_ACCESS_X: |
| 1957 | if (requested_instruction_access == |
| 1958 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 1959 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
| 1960 | if (permissions != NULL) { |
| 1961 | ffa_set_instruction_access_attr( |
| 1962 | permissions, FFA_INSTRUCTION_ACCESS_X); |
| 1963 | } |
| 1964 | break; |
| 1965 | } |
| 1966 | case FFA_INSTRUCTION_ACCESS_NX: |
| 1967 | if (requested_instruction_access == |
| 1968 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 1969 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 1970 | if (permissions != NULL) { |
| 1971 | ffa_set_instruction_access_attr( |
| 1972 | permissions, FFA_INSTRUCTION_ACCESS_NX); |
| 1973 | } |
| 1974 | break; |
| 1975 | } |
| 1976 | dlog_verbose( |
| 1977 | "Invalid instruction access requested; sender " |
| 1978 | "specified permissions %#x but receiver requested " |
| 1979 | "%#x.\n", |
| 1980 | sent_instruction_access, requested_instruction_access); |
| 1981 | return false; |
| 1982 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 1983 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 1984 | "be checked before this point."); |
| 1985 | } |
| 1986 | |
| 1987 | return true; |
| 1988 | } |
| 1989 | |
| 1990 | /** |
| 1991 | * Validate the receivers' permissions in the retrieve request against those |
| 1992 | * specified by the lender. |
| 1993 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 1994 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
| 1995 | * Returns FFA_SUCCESS if all specified permissions are valid. |
| 1996 | */ |
| 1997 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 1998 | struct ffa_memory_region *memory_region, |
| 1999 | struct ffa_memory_region *retrieve_request, ffa_vm_id_t to_vm_id, |
| 2000 | ffa_memory_access_permissions_t *permissions) |
| 2001 | { |
| 2002 | uint32_t retrieve_receiver_index; |
| 2003 | |
| 2004 | assert(permissions != NULL); |
| 2005 | |
| 2006 | if (retrieve_request->receiver_count != memory_region->receiver_count) { |
| 2007 | dlog_verbose( |
| 2008 | "Retrieve request should contain same list of " |
| 2009 | "borrowers, as specified by the lender.\n"); |
| 2010 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2011 | } |
| 2012 | |
| 2013 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 2014 | |
| 2015 | /* Should be populated with the permissions of the retriever. */ |
| 2016 | *permissions = 0; |
| 2017 | |
| 2018 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 2019 | ffa_memory_access_permissions_t sent_permissions; |
| 2020 | struct ffa_memory_access *current_receiver = |
| 2021 | &retrieve_request->receivers[i]; |
| 2022 | ffa_memory_access_permissions_t requested_permissions = |
| 2023 | current_receiver->receiver_permissions.permissions; |
| 2024 | ffa_vm_id_t current_receiver_id = |
| 2025 | current_receiver->receiver_permissions.receiver; |
| 2026 | bool found_to_id = current_receiver_id == to_vm_id; |
| 2027 | |
| 2028 | /* |
| 2029 | * Find the current receiver in the transaction descriptor from |
| 2030 | * sender. |
| 2031 | */ |
| 2032 | uint32_t mem_region_receiver_index = |
| 2033 | ffa_memory_region_get_receiver(memory_region, |
| 2034 | current_receiver_id); |
| 2035 | |
| 2036 | if (mem_region_receiver_index == |
| 2037 | memory_region->receiver_count) { |
| 2038 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 2039 | current_receiver_id); |
| 2040 | return ffa_error(FFA_DENIED); |
| 2041 | } |
| 2042 | |
| 2043 | sent_permissions = |
| 2044 | memory_region->receivers[mem_region_receiver_index] |
| 2045 | .receiver_permissions.permissions; |
| 2046 | |
| 2047 | if (found_to_id) { |
| 2048 | retrieve_receiver_index = i; |
| 2049 | } |
| 2050 | |
| 2051 | /* |
| 2052 | * Since we are traversing the list of receivers, save the index |
| 2053 | * of the caller. As it needs to be there. |
| 2054 | */ |
| 2055 | |
| 2056 | if (current_receiver->composite_memory_region_offset != 0U) { |
| 2057 | dlog_verbose( |
| 2058 | "Retriever specified address ranges not " |
| 2059 | "supported (got offset %d).\n", |
| 2060 | current_receiver |
| 2061 | ->composite_memory_region_offset); |
| 2062 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2063 | } |
| 2064 | |
| 2065 | /* |
| 2066 | * Check permissions from sender against permissions requested |
| 2067 | * by receiver. |
| 2068 | */ |
| 2069 | if (!ffa_memory_retrieve_is_memory_access_valid( |
| 2070 | ffa_get_data_access_attr(sent_permissions), |
| 2071 | ffa_get_data_access_attr(requested_permissions), |
| 2072 | ffa_get_instruction_access_attr(sent_permissions), |
| 2073 | ffa_get_instruction_access_attr( |
| 2074 | requested_permissions), |
| 2075 | found_to_id ? permissions : NULL)) { |
| 2076 | return ffa_error(FFA_DENIED); |
| 2077 | } |
| 2078 | |
| 2079 | /* |
| 2080 | * Can't request PM to clear memory if only provided with RO |
| 2081 | * permissions. |
| 2082 | */ |
| 2083 | if (found_to_id && |
| 2084 | (ffa_get_data_access_attr(*permissions) == |
| 2085 | FFA_DATA_ACCESS_RO) && |
| 2086 | (retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2087 | 0U) { |
| 2088 | dlog_verbose( |
| 2089 | "Receiver has RO permissions can not request " |
| 2090 | "clear.\n"); |
| 2091 | return ffa_error(FFA_DENIED); |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 2096 | dlog_verbose( |
| 2097 | "Retrieve request does not contain caller's (%x) " |
| 2098 | "permissions\n", |
| 2099 | to_vm_id); |
| 2100 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2101 | } |
| 2102 | |
| 2103 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2104 | } |
| 2105 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2106 | /* |
| 2107 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 2108 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 2109 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 2110 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 2111 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 2112 | * exception of the sender ID and handle. |
| 2113 | */ |
| 2114 | bool is_ffa_memory_retrieve_borrower_request(struct ffa_memory_region *request, |
| 2115 | struct vm_locked to_locked) |
| 2116 | { |
| 2117 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
| 2118 | request->attributes == 0U && request->flags == 0U && |
| 2119 | request->tag == 0U && request->receiver_count == 0U && |
| 2120 | plat_ffa_memory_handle_allocated_by_current_world( |
| 2121 | request->handle); |
| 2122 | } |
| 2123 | |
| 2124 | /* |
| 2125 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 2126 | */ |
| 2127 | static void ffa_memory_retrieve_complete_from_hyp( |
| 2128 | struct ffa_memory_share_state *share_state) |
| 2129 | { |
| 2130 | if (share_state->hypervisor_fragment_count == |
| 2131 | share_state->fragment_count) { |
| 2132 | share_state->hypervisor_fragment_count = 0; |
| 2133 | } |
| 2134 | } |
| 2135 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2136 | /** |
| 2137 | * Validate that the memory region descriptor provided by the borrower on |
| 2138 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 2139 | * memory sharing call. |
| 2140 | */ |
| 2141 | static struct ffa_value ffa_memory_retrieve_validate( |
| 2142 | ffa_vm_id_t receiver_id, struct ffa_memory_region *retrieve_request, |
| 2143 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 2144 | uint32_t share_func) |
| 2145 | { |
| 2146 | ffa_memory_region_flags_t transaction_type = |
| 2147 | retrieve_request->flags & |
| 2148 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2149 | enum ffa_memory_security security_state; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2150 | |
| 2151 | assert(retrieve_request != NULL); |
| 2152 | assert(memory_region != NULL); |
| 2153 | assert(receiver_index != NULL); |
| 2154 | assert(retrieve_request->sender == memory_region->sender); |
| 2155 | |
| 2156 | /* |
| 2157 | * Check that the transaction type expected by the receiver is |
| 2158 | * correct, if it has been specified. |
| 2159 | */ |
| 2160 | if (transaction_type != |
| 2161 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 2162 | transaction_type != (memory_region->flags & |
| 2163 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 2164 | dlog_verbose( |
| 2165 | "Incorrect transaction type %#x for " |
| 2166 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
| 2167 | transaction_type, |
| 2168 | memory_region->flags & |
| 2169 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 2170 | retrieve_request->handle); |
| 2171 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2172 | } |
| 2173 | |
| 2174 | if (retrieve_request->tag != memory_region->tag) { |
| 2175 | dlog_verbose( |
| 2176 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
| 2177 | "%d for handle %#x.\n", |
| 2178 | retrieve_request->tag, memory_region->tag, |
| 2179 | retrieve_request->handle); |
| 2180 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2181 | } |
| 2182 | |
| 2183 | *receiver_index = |
| 2184 | ffa_memory_region_get_receiver(memory_region, receiver_id); |
| 2185 | |
| 2186 | if (*receiver_index == memory_region->receiver_count) { |
| 2187 | dlog_verbose( |
| 2188 | "Incorrect receiver VM ID %d for " |
| 2189 | "FFA_MEM_RETRIEVE_REQ, for handle %#x.\n", |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2190 | receiver_id, memory_region->handle); |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2191 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2192 | } |
| 2193 | |
| 2194 | if ((retrieve_request->flags & |
| 2195 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 2196 | dlog_verbose( |
| 2197 | "Retriever specified 'address range alignment 'hint' " |
| 2198 | "not supported.\n"); |
| 2199 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2200 | } |
| 2201 | if ((retrieve_request->flags & |
| 2202 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 2203 | dlog_verbose( |
| 2204 | "Bits 8-5 must be zero in memory region's flags " |
| 2205 | "(address range alignment hint not supported).\n"); |
| 2206 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2207 | } |
| 2208 | |
| 2209 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 2210 | dlog_verbose( |
| 2211 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 2212 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2213 | } |
| 2214 | |
| 2215 | if (share_func == FFA_MEM_SHARE_32 && |
| 2216 | (retrieve_request->flags & |
| 2217 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2218 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 2219 | dlog_verbose( |
| 2220 | "Memory Share operation can't clean after relinquish " |
| 2221 | "memory region.\n"); |
| 2222 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2223 | } |
| 2224 | |
| 2225 | /* |
| 2226 | * If the borrower needs the memory to be cleared before mapping |
| 2227 | * to its address space, the sender should have set the flag |
| 2228 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 2229 | * FFA_DENIED. |
| 2230 | */ |
| 2231 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 2232 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 2233 | dlog_verbose( |
| 2234 | "Borrower needs memory cleared. Sender needs to set " |
| 2235 | "flag for clearing memory.\n"); |
| 2236 | return ffa_error(FFA_DENIED); |
| 2237 | } |
| 2238 | |
Olivier Deprez | 4342a3c | 2022-02-28 09:37:25 +0100 | [diff] [blame] | 2239 | /* Memory region attributes NS-Bit MBZ for FFA_MEM_RETRIEVE_REQ. */ |
| 2240 | security_state = |
| 2241 | ffa_get_memory_security_attr(retrieve_request->attributes); |
| 2242 | if (security_state != FFA_MEMORY_SECURITY_UNSPECIFIED) { |
| 2243 | dlog_verbose( |
| 2244 | "Invalid security state for memory retrieve request " |
| 2245 | "operation.\n"); |
| 2246 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2247 | } |
| 2248 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2249 | /* |
| 2250 | * If memory type is not specified, bypass validation of memory |
| 2251 | * attributes in the retrieve request. The retriever is expecting to |
| 2252 | * obtain this information from the SPMC. |
| 2253 | */ |
| 2254 | if (ffa_get_memory_type_attr(retrieve_request->attributes) == |
| 2255 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 2256 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2257 | } |
| 2258 | |
| 2259 | /* |
| 2260 | * Ensure receiver's attributes are compatible with how |
| 2261 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 2262 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 2263 | */ |
| 2264 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 2265 | } |
| 2266 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2267 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 2268 | struct ffa_memory_region *retrieve_request, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2269 | uint32_t retrieve_request_length, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2270 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2271 | { |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2272 | uint32_t expected_retrieve_request_length = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2273 | sizeof(struct ffa_memory_region) + |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2274 | retrieve_request->receiver_count * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2275 | sizeof(struct ffa_memory_access); |
| 2276 | ffa_memory_handle_t handle = retrieve_request->handle; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2277 | struct ffa_memory_region *memory_region; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2278 | ffa_memory_access_permissions_t permissions = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2279 | uint32_t memory_to_attributes; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2280 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2281 | struct ffa_memory_share_state *share_state; |
| 2282 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2283 | struct ffa_composite_memory_region *composite; |
| 2284 | uint32_t total_length; |
| 2285 | uint32_t fragment_length; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2286 | ffa_vm_id_t receiver_id = to_locked.vm->id; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2287 | bool is_send_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2288 | |
| 2289 | dump_share_states(); |
| 2290 | |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2291 | if (retrieve_request_length != expected_retrieve_request_length) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2292 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2293 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2294 | "but was %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2295 | expected_retrieve_request_length, |
| 2296 | retrieve_request_length); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2297 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2298 | } |
| 2299 | |
| 2300 | share_states = share_states_lock(); |
| 2301 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2302 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2303 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2304 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2305 | goto out; |
| 2306 | } |
| 2307 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2308 | if (!share_state->sending_complete) { |
| 2309 | dlog_verbose( |
| 2310 | "Memory with handle %#x not fully sent, can't " |
| 2311 | "retrieve.\n", |
| 2312 | handle); |
| 2313 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2314 | goto out; |
| 2315 | } |
| 2316 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2317 | memory_region = share_state->memory_region; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2318 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2319 | CHECK(memory_region != NULL); |
| 2320 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2321 | if (retrieve_request->sender != memory_region->sender) { |
| 2322 | dlog_verbose( |
| 2323 | "Memory with handle %#x not fully sent, can't " |
| 2324 | "retrieve.\n", |
| 2325 | handle); |
| 2326 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2327 | goto out; |
| 2328 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2329 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2330 | if (!is_ffa_memory_retrieve_borrower_request(retrieve_request, |
| 2331 | to_locked)) { |
| 2332 | uint32_t receiver_index; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2333 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2334 | /* |
| 2335 | * The SPMC can only process retrieve requests to memory share |
| 2336 | * operations with one borrower from the other world. It can't |
| 2337 | * determine the ID of the NWd VM that invoked the retrieve |
| 2338 | * request interface call. It relies on the hypervisor to |
| 2339 | * validate the caller's ID against that provided in the |
| 2340 | * `receivers` list of the retrieve response. |
| 2341 | * In case there is only one borrower from the NWd in the |
| 2342 | * transaction descriptor, record that in the `receiver_id` for |
| 2343 | * later use, and validate in the retrieve request message. |
| 2344 | */ |
| 2345 | if (to_locked.vm->id == HF_HYPERVISOR_VM_ID) { |
| 2346 | uint32_t other_world_count = 0; |
| 2347 | |
| 2348 | for (uint32_t i = 0; i < memory_region->receiver_count; |
| 2349 | i++) { |
| 2350 | receiver_id = |
| 2351 | retrieve_request->receivers[0] |
| 2352 | .receiver_permissions.receiver; |
| 2353 | if (!vm_id_is_current_world(receiver_id)) { |
| 2354 | other_world_count++; |
| 2355 | } |
| 2356 | } |
| 2357 | if (other_world_count > 1) { |
| 2358 | dlog_verbose( |
| 2359 | "Support one receiver from the other " |
| 2360 | "world.\n"); |
| 2361 | return ffa_error(FFA_NOT_SUPPORTED); |
| 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | /* |
| 2366 | * Validate retrieve request, according to what was sent by the |
| 2367 | * sender. Function will output the `receiver_index` from the |
| 2368 | * provided memory region, and will output `permissions` from |
| 2369 | * the validated requested permissions. |
| 2370 | */ |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2371 | ret = ffa_memory_retrieve_validate( |
| 2372 | receiver_id, retrieve_request, memory_region, |
| 2373 | &receiver_index, share_state->share_func); |
| 2374 | if (ret.func != FFA_SUCCESS_32) { |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2375 | goto out; |
| 2376 | } |
| 2377 | |
| 2378 | if (share_state->retrieved_fragment_count[receiver_index] != |
| 2379 | 0U) { |
| 2380 | dlog_verbose( |
| 2381 | "Memory with handle %#x already retrieved.\n", |
| 2382 | handle); |
| 2383 | ret = ffa_error(FFA_DENIED); |
| 2384 | goto out; |
| 2385 | } |
| 2386 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2387 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 2388 | memory_region, retrieve_request, receiver_id, |
| 2389 | &permissions); |
J-Alves | 614d9f4 | 2022-06-28 14:03:10 +0100 | [diff] [blame] | 2390 | if (ret.func != FFA_SUCCESS_32) { |
| 2391 | goto out; |
| 2392 | } |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 2393 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2394 | memory_to_attributes = ffa_memory_permissions_to_mode( |
| 2395 | permissions, share_state->sender_orig_mode); |
J-Alves | 40e260e | 2022-09-22 17:52:43 +0100 | [diff] [blame] | 2396 | |
| 2397 | if (to_locked.vm->el0_partition) { |
| 2398 | /* |
| 2399 | * Get extra mapping attributes for the given VM ID. |
| 2400 | * If the memory is shared by a VM executing in non |
| 2401 | * secure world, attribute MM_MODE_NS has to be set |
| 2402 | * while mapping that in a SP executing in secure world. |
| 2403 | */ |
| 2404 | memory_to_attributes |= |
| 2405 | arch_mm_extra_attributes_from_vm( |
| 2406 | retrieve_request->sender); |
| 2407 | } |
| 2408 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2409 | ret = ffa_retrieve_check_update( |
| 2410 | to_locked, memory_region->sender, |
| 2411 | share_state->fragments, |
| 2412 | share_state->fragment_constituent_counts, |
| 2413 | share_state->fragment_count, memory_to_attributes, |
| 2414 | share_state->share_func, false, page_pool); |
| 2415 | |
| 2416 | if (ret.func != FFA_SUCCESS_32) { |
| 2417 | goto out; |
| 2418 | } |
| 2419 | |
| 2420 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 2421 | is_send_complete = |
| 2422 | share_state->retrieved_fragment_count[receiver_index] == |
| 2423 | share_state->fragment_count; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2424 | |
| 2425 | share_state->clear_after_relinquish = |
| 2426 | (retrieve_request->flags & |
| 2427 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH) != 0U; |
| 2428 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2429 | } else { |
| 2430 | if (share_state->hypervisor_fragment_count != 0U) { |
| 2431 | dlog_verbose( |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2432 | "Memory with handle %#x already retrieved by " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2433 | "the hypervisor.\n", |
| 2434 | handle); |
| 2435 | ret = ffa_error(FFA_DENIED); |
| 2436 | goto out; |
| 2437 | } |
| 2438 | |
| 2439 | share_state->hypervisor_fragment_count = 1; |
| 2440 | |
| 2441 | ffa_memory_retrieve_complete_from_hyp(share_state); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2442 | } |
| 2443 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2444 | /* VMs acquire the RX buffer from SPMC. */ |
| 2445 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2446 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2447 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2448 | * Copy response to RX buffer of caller and deliver the message. |
| 2449 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2450 | */ |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2451 | /* TODO: combine attributes from sender and request. */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2452 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2453 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2454 | * Constituents which we received in the first fragment should |
| 2455 | * always fit in the first fragment we are sending, because the |
| 2456 | * header is the same size in both cases and we have a fixed |
| 2457 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 2458 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2459 | */ |
| 2460 | CHECK(ffa_retrieved_memory_region_init( |
J-Alves | 2d8457f | 2022-10-05 11:06:41 +0100 | [diff] [blame] | 2461 | to_locked.vm->mailbox.recv, to_locked.vm->ffa_version, |
| 2462 | HF_MAILBOX_SIZE, memory_region->sender, |
| 2463 | memory_region->attributes, memory_region->flags, handle, |
| 2464 | receiver_id, permissions, composite->page_count, |
| 2465 | composite->constituent_count, share_state->fragments[0], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2466 | share_state->fragment_constituent_counts[0], &total_length, |
| 2467 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2468 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2469 | to_locked.vm->mailbox.recv_size = fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2470 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2471 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2472 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2473 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2474 | if (is_send_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2475 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2476 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2477 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2478 | ret = (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2479 | .arg1 = total_length, |
| 2480 | .arg2 = fragment_length}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2481 | out: |
| 2482 | share_states_unlock(&share_states); |
| 2483 | dump_share_states(); |
| 2484 | return ret; |
| 2485 | } |
| 2486 | |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2487 | /** |
| 2488 | * Determine expected fragment offset according to the FF-A version of |
| 2489 | * the caller. |
| 2490 | */ |
| 2491 | static uint32_t ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2492 | struct ffa_memory_region *memory_region, |
| 2493 | uint32_t retrieved_constituents_count, uint32_t ffa_version) |
| 2494 | { |
| 2495 | uint32_t expected_fragment_offset; |
| 2496 | uint32_t composite_constituents_offset; |
| 2497 | |
| 2498 | if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 2499 | /* |
| 2500 | * Hafnium operates memory regions in FF-A v1.1 format, so we |
| 2501 | * can retrieve the constituents offset from descriptor. |
| 2502 | */ |
| 2503 | composite_constituents_offset = |
| 2504 | ffa_composite_constituent_offset(memory_region, 0); |
| 2505 | } else if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 2506 | /* |
| 2507 | * If retriever is FF-A v1.0, determine the composite offset |
| 2508 | * as it is expected to have been configured in the |
| 2509 | * retrieve response. |
| 2510 | */ |
| 2511 | composite_constituents_offset = |
| 2512 | sizeof(struct ffa_memory_region_v1_0) + |
| 2513 | RECEIVERS_COUNT_IN_RETRIEVE_RESP * |
| 2514 | sizeof(struct ffa_memory_access) + |
| 2515 | sizeof(struct ffa_composite_memory_region); |
| 2516 | } else { |
| 2517 | panic("%s received an invalid FF-A version.\n", __func__); |
| 2518 | } |
| 2519 | |
| 2520 | expected_fragment_offset = |
| 2521 | composite_constituents_offset + |
| 2522 | retrieved_constituents_count * |
| 2523 | sizeof(struct ffa_memory_region_constituent) - |
| 2524 | sizeof(struct ffa_memory_access) * |
| 2525 | (memory_region->receiver_count - 1); |
| 2526 | |
| 2527 | return expected_fragment_offset; |
| 2528 | } |
| 2529 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2530 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 2531 | ffa_memory_handle_t handle, |
| 2532 | uint32_t fragment_offset, |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2533 | ffa_vm_id_t sender_vm_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2534 | struct mpool *page_pool) |
| 2535 | { |
| 2536 | struct ffa_memory_region *memory_region; |
| 2537 | struct share_states_locked share_states; |
| 2538 | struct ffa_memory_share_state *share_state; |
| 2539 | struct ffa_value ret; |
| 2540 | uint32_t fragment_index; |
| 2541 | uint32_t retrieved_constituents_count; |
| 2542 | uint32_t i; |
| 2543 | uint32_t expected_fragment_offset; |
| 2544 | uint32_t remaining_constituent_count; |
| 2545 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2546 | uint32_t receiver_index; |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2547 | bool continue_ffa_hyp_mem_retrieve_req; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2548 | |
| 2549 | dump_share_states(); |
| 2550 | |
| 2551 | share_states = share_states_lock(); |
| 2552 | if (!get_share_state(share_states, handle, &share_state)) { |
| 2553 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 2554 | handle); |
| 2555 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2556 | goto out; |
| 2557 | } |
| 2558 | |
| 2559 | memory_region = share_state->memory_region; |
| 2560 | CHECK(memory_region != NULL); |
| 2561 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2562 | if (!share_state->sending_complete) { |
| 2563 | dlog_verbose( |
| 2564 | "Memory with handle %#x not fully sent, can't " |
| 2565 | "retrieve.\n", |
| 2566 | handle); |
| 2567 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2568 | goto out; |
| 2569 | } |
| 2570 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2571 | /* |
| 2572 | * If retrieve request from the hypervisor has been initiated in the |
| 2573 | * given share_state, continue it, else assume it is a continuation of |
| 2574 | * retrieve request from a NWd VM. |
| 2575 | */ |
| 2576 | continue_ffa_hyp_mem_retrieve_req = |
| 2577 | (to_locked.vm->id == HF_HYPERVISOR_VM_ID) && |
| 2578 | (share_state->hypervisor_fragment_count != 0U) && |
| 2579 | plat_ffa_is_vm_id(sender_vm_id); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2580 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2581 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2582 | receiver_index = ffa_memory_region_get_receiver( |
| 2583 | memory_region, to_locked.vm->id); |
| 2584 | |
| 2585 | if (receiver_index == memory_region->receiver_count) { |
| 2586 | dlog_verbose( |
| 2587 | "Caller of FFA_MEM_FRAG_RX (%x) is not a " |
| 2588 | "borrower to memory sharing transaction (%x)\n", |
| 2589 | to_locked.vm->id, handle); |
| 2590 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2591 | goto out; |
| 2592 | } |
| 2593 | |
| 2594 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2595 | 0 || |
| 2596 | share_state->retrieved_fragment_count[receiver_index] >= |
| 2597 | share_state->fragment_count) { |
| 2598 | dlog_verbose( |
| 2599 | "Retrieval of memory with handle %#x not yet " |
| 2600 | "started or already completed (%d/%d fragments " |
| 2601 | "retrieved).\n", |
| 2602 | handle, |
| 2603 | share_state->retrieved_fragment_count |
| 2604 | [receiver_index], |
| 2605 | share_state->fragment_count); |
| 2606 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2607 | goto out; |
| 2608 | } |
| 2609 | |
| 2610 | fragment_index = |
| 2611 | share_state->retrieved_fragment_count[receiver_index]; |
| 2612 | } else { |
| 2613 | if (share_state->hypervisor_fragment_count == 0 || |
| 2614 | share_state->hypervisor_fragment_count >= |
| 2615 | share_state->fragment_count) { |
| 2616 | dlog_verbose( |
| 2617 | "Retrieve of memory with handle %x not " |
| 2618 | "started from hypervisor.\n", |
| 2619 | handle); |
| 2620 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2621 | goto out; |
| 2622 | } |
| 2623 | |
| 2624 | if (memory_region->sender != sender_vm_id) { |
| 2625 | dlog_verbose( |
| 2626 | "Sender ID (%x) is not as expected for memory " |
| 2627 | "handle %x\n", |
| 2628 | sender_vm_id, handle); |
| 2629 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2630 | goto out; |
| 2631 | } |
| 2632 | |
| 2633 | fragment_index = share_state->hypervisor_fragment_count; |
| 2634 | |
| 2635 | receiver_index = 0; |
| 2636 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2637 | |
| 2638 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2639 | * Check that the given fragment offset is correct by counting |
| 2640 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2641 | */ |
| 2642 | retrieved_constituents_count = 0; |
| 2643 | for (i = 0; i < fragment_index; ++i) { |
| 2644 | retrieved_constituents_count += |
| 2645 | share_state->fragment_constituent_counts[i]; |
| 2646 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2647 | |
| 2648 | CHECK(memory_region->receiver_count > 0); |
| 2649 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2650 | expected_fragment_offset = |
J-Alves | 5da37d9 | 2022-10-24 16:33:48 +0100 | [diff] [blame] | 2651 | ffa_memory_retrieve_expected_offset_per_ffa_version( |
| 2652 | memory_region, retrieved_constituents_count, |
| 2653 | to_locked.vm->ffa_version); |
| 2654 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2655 | if (fragment_offset != expected_fragment_offset) { |
| 2656 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 2657 | fragment_offset, expected_fragment_offset); |
| 2658 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2659 | goto out; |
| 2660 | } |
| 2661 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2662 | /* VMs acquire the RX buffer from SPMC. */ |
| 2663 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2664 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2665 | remaining_constituent_count = ffa_memory_fragment_init( |
| 2666 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2667 | share_state->fragments[fragment_index], |
| 2668 | share_state->fragment_constituent_counts[fragment_index], |
| 2669 | &fragment_length); |
| 2670 | CHECK(remaining_constituent_count == 0); |
| 2671 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 2672 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 2673 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
J-Alves | e8c8c2b | 2022-12-16 15:34:48 +0000 | [diff] [blame] | 2674 | to_locked.vm->mailbox.state = MAILBOX_STATE_FULL; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2675 | |
J-Alves | 59ed004 | 2022-07-28 18:26:41 +0100 | [diff] [blame] | 2676 | if (!continue_ffa_hyp_mem_retrieve_req) { |
| 2677 | share_state->retrieved_fragment_count[receiver_index]++; |
| 2678 | if (share_state->retrieved_fragment_count[receiver_index] == |
| 2679 | share_state->fragment_count) { |
| 2680 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2681 | page_pool); |
| 2682 | } |
| 2683 | } else { |
| 2684 | share_state->hypervisor_fragment_count++; |
| 2685 | |
| 2686 | ffa_memory_retrieve_complete_from_hyp(share_state); |
| 2687 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2688 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 2689 | .arg1 = (uint32_t)handle, |
| 2690 | .arg2 = (uint32_t)(handle >> 32), |
| 2691 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2692 | |
| 2693 | out: |
| 2694 | share_states_unlock(&share_states); |
| 2695 | dump_share_states(); |
| 2696 | return ret; |
| 2697 | } |
| 2698 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2699 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2700 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2701 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2702 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2703 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2704 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2705 | struct ffa_memory_share_state *share_state; |
| 2706 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2707 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2708 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2709 | uint32_t receiver_index; |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2710 | bool receivers_relinquished_memory; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2711 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2712 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2713 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2714 | "Stream endpoints not supported (got %d " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2715 | "endpoints on FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2716 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2717 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2718 | } |
| 2719 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2720 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2721 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2722 | "VM ID %d in relinquish message doesn't match " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2723 | "calling VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2724 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2725 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2726 | } |
| 2727 | |
| 2728 | dump_share_states(); |
| 2729 | |
| 2730 | share_states = share_states_lock(); |
| 2731 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2732 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2733 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2734 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2735 | goto out; |
| 2736 | } |
| 2737 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2738 | if (!share_state->sending_complete) { |
| 2739 | dlog_verbose( |
| 2740 | "Memory with handle %#x not fully sent, can't " |
| 2741 | "relinquish.\n", |
| 2742 | handle); |
| 2743 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2744 | goto out; |
| 2745 | } |
| 2746 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2747 | memory_region = share_state->memory_region; |
| 2748 | CHECK(memory_region != NULL); |
| 2749 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2750 | receiver_index = ffa_memory_region_get_receiver(memory_region, |
| 2751 | from_locked.vm->id); |
| 2752 | |
| 2753 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2754 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2755 | "VM ID %d tried to relinquish memory region " |
J-Alves | 668a86e | 2023-05-10 11:53:25 +0100 | [diff] [blame] | 2756 | "with handle %#x and it is not a valid borrower.\n", |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2757 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2758 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2759 | goto out; |
| 2760 | } |
| 2761 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2762 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2763 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2764 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2765 | "Memory with handle %#x not yet fully " |
| 2766 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2767 | "receiver %x can't relinquish.\n", |
| 2768 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2769 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2770 | goto out; |
| 2771 | } |
| 2772 | |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2773 | /* |
| 2774 | * Either clear if requested in relinquish call, or in a retrieve |
| 2775 | * request from one of the borrowers. |
| 2776 | */ |
| 2777 | receivers_relinquished_memory = true; |
| 2778 | |
| 2779 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2780 | struct ffa_memory_access *receiver = |
| 2781 | &memory_region->receivers[i]; |
| 2782 | |
| 2783 | if (receiver->receiver_permissions.receiver == |
| 2784 | from_locked.vm->id) { |
| 2785 | continue; |
| 2786 | } |
| 2787 | |
| 2788 | if (share_state->retrieved_fragment_count[i] != 0U) { |
| 2789 | receivers_relinquished_memory = false; |
| 2790 | break; |
| 2791 | } |
| 2792 | } |
| 2793 | |
| 2794 | clear = receivers_relinquished_memory && |
| 2795 | (share_state->clear_after_relinquish || |
| 2796 | (relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 2797 | 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2798 | |
| 2799 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2800 | * Clear is not allowed for memory that was shared, as the |
| 2801 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2802 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2803 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2804 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2805 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2806 | goto out; |
| 2807 | } |
| 2808 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2809 | ret = ffa_relinquish_check_update( |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2810 | from_locked, memory_region->sender, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2811 | share_state->fragment_constituent_counts, |
| 2812 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2813 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2814 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2815 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2816 | * Mark memory handle as not retrieved, so it can be |
| 2817 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2818 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2819 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2820 | } |
| 2821 | |
| 2822 | out: |
| 2823 | share_states_unlock(&share_states); |
| 2824 | dump_share_states(); |
| 2825 | return ret; |
| 2826 | } |
| 2827 | |
| 2828 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2829 | * Validates that the reclaim transition is allowed for the given |
| 2830 | * handle, updates the page table of the reclaiming VM, and frees the |
| 2831 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2832 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2833 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2834 | ffa_memory_handle_t handle, |
| 2835 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2836 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2837 | { |
| 2838 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2839 | struct ffa_memory_share_state *share_state; |
| 2840 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2841 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2842 | |
| 2843 | dump_share_states(); |
| 2844 | |
| 2845 | share_states = share_states_lock(); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2846 | if (get_share_state(share_states, handle, &share_state)) { |
| 2847 | memory_region = share_state->memory_region; |
| 2848 | } else { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2849 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2850 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2851 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2852 | goto out; |
| 2853 | } |
| 2854 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2855 | CHECK(memory_region != NULL); |
| 2856 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2857 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 2858 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2859 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 2860 | "VM %#x attempted to reclaim memory handle %#x " |
| 2861 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2862 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2863 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2864 | goto out; |
| 2865 | } |
| 2866 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2867 | if (!share_state->sending_complete) { |
| 2868 | dlog_verbose( |
| 2869 | "Memory with handle %#x not fully sent, can't " |
| 2870 | "reclaim.\n", |
| 2871 | handle); |
| 2872 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2873 | goto out; |
| 2874 | } |
| 2875 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2876 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2877 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 2878 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2879 | "Tried to reclaim memory handle %#x " |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2880 | "that has not been relinquished by all " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2881 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2882 | handle, |
| 2883 | memory_region->receivers[i] |
| 2884 | .receiver_permissions.receiver); |
| 2885 | ret = ffa_error(FFA_DENIED); |
| 2886 | goto out; |
| 2887 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2888 | } |
| 2889 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2890 | ret = ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 2891 | to_locked, memory_region->sender, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2892 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2893 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2894 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2895 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2896 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2897 | share_state_free(share_states, share_state, page_pool); |
J-Alves | 3c5b207 | 2022-11-21 12:45:40 +0000 | [diff] [blame] | 2898 | dlog_verbose("Freed share state after successful reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2899 | } |
| 2900 | |
| 2901 | out: |
| 2902 | share_states_unlock(&share_states); |
| 2903 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2904 | } |