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 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 25 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 26 | * 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] | 27 | * by this lock. |
| 28 | */ |
| 29 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 30 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 31 | |
| 32 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 33 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 34 | */ |
| 35 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 36 | { |
| 37 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 38 | } |
| 39 | |
| 40 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 41 | * Initialises the next available `struct ffa_memory_share_state` and sets |
| 42 | * `share_state_ret` to a pointer to it. If `handle` is |
| 43 | * `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, otherwise |
| 44 | * uses the provided handle which is assumed to be globally unique. |
| 45 | * |
| 46 | * Returns true on success or false if none are available. |
| 47 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 48 | bool allocate_share_state(struct share_states_locked share_states, |
| 49 | uint32_t share_func, |
| 50 | struct ffa_memory_region *memory_region, |
| 51 | uint32_t fragment_length, ffa_memory_handle_t handle, |
| 52 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 53 | { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 54 | uint64_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 55 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 56 | assert(share_states.share_states != NULL); |
| 57 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 58 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 59 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 60 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 61 | uint32_t j; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 62 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 63 | &share_states.share_states[i]; |
| 64 | struct ffa_composite_memory_region *composite = |
| 65 | ffa_memory_region_get_composite(memory_region, |
| 66 | 0); |
| 67 | |
| 68 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 69 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 70 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 71 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 72 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 73 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 74 | allocated_state->share_func = share_func; |
| 75 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 76 | allocated_state->fragment_count = 1; |
| 77 | allocated_state->fragments[0] = composite->constituents; |
| 78 | allocated_state->fragment_constituent_counts[0] = |
| 79 | (fragment_length - |
| 80 | ffa_composite_constituent_offset(memory_region, |
| 81 | 0)) / |
| 82 | sizeof(struct ffa_memory_region_constituent); |
| 83 | allocated_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 84 | for (j = 0; j < MAX_MEM_SHARE_RECIPIENTS; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 85 | allocated_state->retrieved_fragment_count[j] = |
| 86 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 87 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 88 | if (share_state_ret != NULL) { |
| 89 | *share_state_ret = allocated_state; |
| 90 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 91 | return true; |
| 92 | } |
| 93 | } |
| 94 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 95 | return false; |
| 96 | } |
| 97 | |
| 98 | /** Locks the share states lock. */ |
| 99 | struct share_states_locked share_states_lock(void) |
| 100 | { |
| 101 | sl_lock(&share_states_lock_instance); |
| 102 | |
| 103 | return (struct share_states_locked){.share_states = share_states}; |
| 104 | } |
| 105 | |
| 106 | /** Unlocks the share states lock. */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 107 | void share_states_unlock(struct share_states_locked *share_states) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 108 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 109 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 110 | share_states->share_states = NULL; |
| 111 | sl_unlock(&share_states_lock_instance); |
| 112 | } |
| 113 | |
| 114 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 115 | * If the given handle is a valid handle for an allocated share state then |
| 116 | * initialises `share_state_ret` to point to the share state and returns true. |
| 117 | * Otherwise returns false. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 118 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 119 | bool get_share_state(struct share_states_locked share_states, |
| 120 | ffa_memory_handle_t handle, |
| 121 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 122 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 123 | struct ffa_memory_share_state *share_state; |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 124 | uint64_t index; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 125 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 126 | assert(share_states.share_states != NULL); |
| 127 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 128 | |
| 129 | /* |
| 130 | * First look for a share_state allocated by us, in which case the |
| 131 | * handle is based on the index. |
| 132 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 133 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 134 | index = ffa_memory_handle_get_index(handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 135 | if (index < MAX_MEM_SHARES) { |
| 136 | share_state = &share_states.share_states[index]; |
| 137 | if (share_state->share_func != 0) { |
| 138 | *share_state_ret = share_state; |
| 139 | return true; |
| 140 | } |
| 141 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 142 | } |
| 143 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 144 | /* Fall back to a linear scan. */ |
| 145 | for (index = 0; index < MAX_MEM_SHARES; ++index) { |
| 146 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 147 | if (share_state->memory_region != NULL && |
| 148 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 149 | share_state->share_func != 0) { |
| 150 | *share_state_ret = share_state; |
| 151 | return true; |
| 152 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 153 | } |
| 154 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 155 | return false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /** Marks a share state as unallocated. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 159 | void share_state_free(struct share_states_locked share_states, |
| 160 | struct ffa_memory_share_state *share_state, |
| 161 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 162 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 163 | uint32_t i; |
| 164 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 165 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 166 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 167 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 168 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 169 | /* |
| 170 | * First fragment is part of the same page as the `memory_region`, so it |
| 171 | * doesn't need to be freed separately. |
| 172 | */ |
| 173 | share_state->fragments[0] = NULL; |
| 174 | share_state->fragment_constituent_counts[0] = 0; |
| 175 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 176 | mpool_free(page_pool, share_state->fragments[i]); |
| 177 | share_state->fragments[i] = NULL; |
| 178 | share_state->fragment_constituent_counts[i] = 0; |
| 179 | } |
| 180 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 181 | share_state->memory_region = NULL; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 182 | share_state->hypervisor_fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 183 | } |
| 184 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 185 | /** Checks whether the given share state has been fully sent. */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 186 | bool share_state_sending_complete(struct share_states_locked share_states, |
| 187 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 188 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 189 | struct ffa_composite_memory_region *composite; |
| 190 | uint32_t expected_constituent_count; |
| 191 | uint32_t fragment_constituent_count_total = 0; |
| 192 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 193 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 194 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 195 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 196 | |
| 197 | /* |
| 198 | * Share state must already be valid, or it's not possible to get hold |
| 199 | * of it. |
| 200 | */ |
| 201 | CHECK(share_state->memory_region != NULL && |
| 202 | share_state->share_func != 0); |
| 203 | |
| 204 | composite = |
| 205 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 206 | expected_constituent_count = composite->constituent_count; |
| 207 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 208 | fragment_constituent_count_total += |
| 209 | share_state->fragment_constituent_counts[i]; |
| 210 | } |
| 211 | dlog_verbose( |
| 212 | "Checking completion: constituent count %d/%d from %d " |
| 213 | "fragments.\n", |
| 214 | fragment_constituent_count_total, expected_constituent_count, |
| 215 | share_state->fragment_count); |
| 216 | |
| 217 | return fragment_constituent_count_total == expected_constituent_count; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Calculates the offset of the next fragment expected for the given share |
| 222 | * state. |
| 223 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 224 | uint32_t share_state_next_fragment_offset( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 225 | struct share_states_locked share_states, |
| 226 | struct ffa_memory_share_state *share_state) |
| 227 | { |
| 228 | uint32_t next_fragment_offset; |
| 229 | uint32_t i; |
| 230 | |
| 231 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 232 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 233 | |
| 234 | next_fragment_offset = |
| 235 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 236 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 237 | next_fragment_offset += |
| 238 | share_state->fragment_constituent_counts[i] * |
| 239 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 240 | } |
| 241 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 242 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 243 | } |
| 244 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 245 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 246 | { |
| 247 | uint32_t i; |
| 248 | |
| 249 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 250 | return; |
| 251 | } |
| 252 | |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 253 | dlog("from VM %#x, attributes %#x, flags %#x, tag %u, to " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 254 | "%u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 255 | "recipients [", |
| 256 | memory_region->sender, memory_region->attributes, |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 257 | memory_region->flags, memory_region->tag, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 258 | memory_region->receiver_count); |
| 259 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 260 | if (i != 0) { |
| 261 | dlog(", "); |
| 262 | } |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 263 | dlog("VM %#x: %#x (offset %u)", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 264 | memory_region->receivers[i].receiver_permissions.receiver, |
| 265 | memory_region->receivers[i] |
| 266 | .receiver_permissions.permissions, |
| 267 | memory_region->receivers[i] |
| 268 | .composite_memory_region_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 269 | } |
| 270 | dlog("]"); |
| 271 | } |
| 272 | |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 273 | void dump_share_states(void) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 274 | { |
| 275 | uint32_t i; |
| 276 | |
| 277 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 278 | return; |
| 279 | } |
| 280 | |
| 281 | dlog("Current share states:\n"); |
| 282 | sl_lock(&share_states_lock_instance); |
| 283 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 284 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 285 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 286 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 287 | dlog("SHARE"); |
| 288 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 289 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 290 | dlog("LEND"); |
| 291 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 292 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 293 | dlog("DONATE"); |
| 294 | break; |
| 295 | default: |
| 296 | dlog("invalid share_func %#x", |
| 297 | share_states[i].share_func); |
| 298 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 299 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 300 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 301 | if (share_states[i].sending_complete) { |
| 302 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 303 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 304 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 305 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 306 | dlog(" with %d fragments, %d retrieved, " |
| 307 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 308 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 309 | share_states[i].retrieved_fragment_count[0], |
| 310 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 311 | } |
| 312 | } |
| 313 | sl_unlock(&share_states_lock_instance); |
| 314 | } |
| 315 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 316 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 317 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 318 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 319 | { |
| 320 | uint32_t mode = 0; |
| 321 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 322 | switch (ffa_get_data_access_attr(permissions)) { |
| 323 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 324 | mode = MM_MODE_R; |
| 325 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 326 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 327 | mode = MM_MODE_R | MM_MODE_W; |
| 328 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 329 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 330 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 331 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 332 | case FFA_DATA_ACCESS_RESERVED: |
| 333 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 334 | } |
| 335 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 336 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 337 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 338 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 339 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 340 | mode |= MM_MODE_X; |
| 341 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 342 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 343 | mode |= (default_mode & MM_MODE_X); |
| 344 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 345 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 346 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | return mode; |
| 350 | } |
| 351 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 352 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 353 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 354 | * pages in the given constituents, if they all have the same mode, or return |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 355 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 356 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 357 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 358 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 359 | struct ffa_memory_region_constituent **fragments, |
| 360 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 361 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 362 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 363 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 364 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 365 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 366 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 367 | * Fail if there are no constituents. Otherwise we would get an |
| 368 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 369 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 370 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 371 | } |
| 372 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 373 | for (i = 0; i < fragment_count; ++i) { |
| 374 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 375 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 376 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 377 | ipaddr_t end = ipa_add(begin, size); |
| 378 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 379 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 380 | /* Fail if addresses are not page-aligned. */ |
| 381 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 382 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
| 383 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 384 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 385 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 386 | /* |
| 387 | * Ensure that this constituent memory range is all |
| 388 | * mapped with the same mode. |
| 389 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 390 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 391 | return ffa_error(FFA_DENIED); |
| 392 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 393 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 394 | /* |
| 395 | * Ensure that all constituents are mapped with the same |
| 396 | * mode. |
| 397 | */ |
| 398 | if (i == 0) { |
| 399 | *orig_mode = current_mode; |
| 400 | } else if (current_mode != *orig_mode) { |
| 401 | dlog_verbose( |
| 402 | "Expected mode %#x but was %#x for %d " |
| 403 | "pages at %#x.\n", |
| 404 | *orig_mode, current_mode, |
| 405 | fragments[i][j].page_count, |
| 406 | ipa_addr(begin)); |
| 407 | return ffa_error(FFA_DENIED); |
| 408 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 409 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 410 | } |
| 411 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 412 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | /** |
| 416 | * Verify that all pages have the same mode, that the starting mode |
| 417 | * constitutes a valid state and obtain the next mode to apply |
| 418 | * to the sending VM. |
| 419 | * |
| 420 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 421 | * 1) FFA_DENIED if a state transition was not found; |
| 422 | * 2) FFA_DENIED if the pages being shared do not have the same mode within |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 423 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 424 | * 3) FFA_INVALID_PARAMETERS if the beginning and end IPAs are not page |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 425 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 426 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 427 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 428 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 429 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 430 | struct vm_locked from, uint32_t share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 431 | struct ffa_memory_access *receivers, uint32_t receivers_count, |
| 432 | uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 433 | struct ffa_memory_region_constituent **fragments, |
| 434 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 435 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 436 | { |
| 437 | const uint32_t state_mask = |
| 438 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 439 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 440 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 441 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 442 | fragment_constituent_counts, |
| 443 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 444 | if (ret.func != FFA_SUCCESS_32) { |
Olivier Deprez | e7eb168 | 2022-03-16 17:09:03 +0100 | [diff] [blame] | 445 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 446 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 449 | /* Ensure the address range is normal memory and not a device. */ |
| 450 | if (*orig_from_mode & MM_MODE_D) { |
| 451 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 452 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 453 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Ensure the sender is the owner and has exclusive access to the |
| 458 | * memory. |
| 459 | */ |
| 460 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 461 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 462 | } |
| 463 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 464 | assert(receivers != NULL && receivers_count > 0U); |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 465 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 466 | for (uint32_t i = 0U; i < receivers_count; i++) { |
| 467 | ffa_memory_access_permissions_t permissions = |
| 468 | receivers[i].receiver_permissions.permissions; |
| 469 | uint32_t required_from_mode = ffa_memory_permissions_to_mode( |
| 470 | permissions, *orig_from_mode); |
| 471 | |
| 472 | if ((*orig_from_mode & required_from_mode) != |
| 473 | required_from_mode) { |
| 474 | dlog_verbose( |
| 475 | "Sender tried to send memory with permissions " |
| 476 | "which " |
| 477 | "required mode %#x but only had %#x itself.\n", |
| 478 | required_from_mode, *orig_from_mode); |
| 479 | return ffa_error(FFA_DENIED); |
| 480 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /* Find the appropriate new mode. */ |
| 484 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 485 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 486 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 487 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 488 | break; |
| 489 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 490 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 491 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 492 | break; |
| 493 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 494 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 495 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 496 | break; |
| 497 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 498 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 499 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 500 | } |
| 501 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 502 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 505 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 506 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 507 | struct ffa_memory_region_constituent **fragments, |
| 508 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 509 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 510 | { |
| 511 | const uint32_t state_mask = |
| 512 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 513 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 514 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 515 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 516 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 517 | fragment_constituent_counts, |
| 518 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 519 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 520 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | /* Ensure the address range is normal memory and not a device. */ |
| 524 | if (*orig_from_mode & MM_MODE_D) { |
| 525 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 526 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 527 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Ensure the relinquishing VM is not the owner but has access to the |
| 532 | * memory. |
| 533 | */ |
| 534 | orig_from_state = *orig_from_mode & state_mask; |
| 535 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 536 | dlog_verbose( |
| 537 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 538 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 539 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 540 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | /* Find the appropriate new mode. */ |
| 544 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 545 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 546 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | /** |
| 550 | * Verify that all pages have the same mode, that the starting mode |
| 551 | * constitutes a valid state and obtain the next mode to apply |
| 552 | * to the retrieving VM. |
| 553 | * |
| 554 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 555 | * 1) FFA_DENIED if a state transition was not found; |
| 556 | * 2) FFA_DENIED if the pages being shared do not have the same mode within |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 557 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 558 | * 3) FFA_INVALID_PARAMETERS if the beginning and end IPAs are not page |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 559 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 560 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 561 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 562 | */ |
J-Alves | fc19b37 | 2022-07-06 12:17:35 +0100 | [diff] [blame] | 563 | struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 564 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 565 | struct ffa_memory_region_constituent **fragments, |
| 566 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 567 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 568 | { |
| 569 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 570 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 571 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 572 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 573 | fragment_constituent_counts, |
| 574 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 575 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 576 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 577 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 580 | if (share_func == FFA_MEM_RECLAIM_32) { |
J-Alves | 9256f16 | 2021-12-09 13:18:43 +0000 | [diff] [blame] | 581 | /* |
| 582 | * If the original ffa memory send call has been processed |
| 583 | * successfully, it is expected the orig_to_mode would overlay |
| 584 | * with `state_mask`, as a result of the function |
| 585 | * `ffa_send_check_transition`. |
| 586 | */ |
Daniel Boulby | 9133dad | 2022-04-25 14:38:44 +0100 | [diff] [blame] | 587 | assert((orig_to_mode & (MM_MODE_INVALID | MM_MODE_UNOWNED | |
| 588 | MM_MODE_SHARED)) != 0U); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 589 | } else { |
| 590 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 591 | * If the retriever is from virtual FF-A instance: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 592 | * Ensure the retriever has the expected state. We don't care |
| 593 | * about the MM_MODE_SHARED bit; either with or without it set |
| 594 | * are both valid representations of the !O-NA state. |
| 595 | */ |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 596 | if (vm_id_is_current_world(to.vm->id) && |
| 597 | to.vm->id != HF_PRIMARY_VM_ID && |
| 598 | (orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 599 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 600 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 601 | } |
| 602 | } |
| 603 | |
| 604 | /* Find the appropriate new mode. */ |
| 605 | *to_mode = memory_to_attributes; |
| 606 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 607 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 608 | *to_mode |= 0; |
| 609 | break; |
| 610 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 611 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 612 | *to_mode |= MM_MODE_UNOWNED; |
| 613 | break; |
| 614 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 615 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 616 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 617 | break; |
| 618 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 619 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 620 | *to_mode |= 0; |
| 621 | break; |
| 622 | |
| 623 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 624 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 625 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 626 | } |
| 627 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 628 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 629 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 630 | |
| 631 | /** |
| 632 | * Updates a VM's page table such that the given set of physical address ranges |
| 633 | * are mapped in the address space at the corresponding address ranges, in the |
| 634 | * mode provided. |
| 635 | * |
| 636 | * If commit is false, the page tables will be allocated from the mpool but no |
| 637 | * mappings will actually be updated. This function must always be called first |
| 638 | * with commit false to check that it will succeed before calling with commit |
| 639 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 640 | * series of changes atomically you can call them all with commit false before |
| 641 | * calling them all with commit true. |
| 642 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 643 | * vm_ptable_defrag should always be called after a series of page table |
| 644 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 645 | * |
| 646 | * Returns true on success, or false if the update failed and no changes were |
| 647 | * made to memory mappings. |
| 648 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 649 | bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 650 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 651 | struct ffa_memory_region_constituent **fragments, |
| 652 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 653 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 654 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 655 | uint32_t i; |
| 656 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 657 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 658 | if (vm_locked.vm->el0_partition) { |
| 659 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 660 | } |
| 661 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 662 | /* Iterate over the memory region constituents within each fragment. */ |
| 663 | for (i = 0; i < fragment_count; ++i) { |
| 664 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 665 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 666 | paddr_t pa_begin = |
| 667 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 668 | paddr_t pa_end = pa_add(pa_begin, size); |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 669 | uint32_t pa_bits = |
| 670 | arch_mm_get_pa_bits(arch_mm_get_pa_range()); |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 671 | |
| 672 | /* |
| 673 | * Ensure the requested region falls into system's PA |
| 674 | * range. |
| 675 | */ |
Jens Wiklander | 4f1880c | 2022-10-19 17:00:14 +0200 | [diff] [blame] | 676 | if (((pa_addr(pa_begin) >> pa_bits) > 0) || |
| 677 | ((pa_addr(pa_end) >> pa_bits) > 0)) { |
Federico Recanati | 4fd065d | 2021-12-13 20:06:23 +0100 | [diff] [blame] | 678 | dlog_error("Region is outside of PA Range\n"); |
| 679 | return false; |
| 680 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 681 | |
| 682 | if (commit) { |
| 683 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 684 | mode, ppool, NULL); |
| 685 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 686 | pa_end, mode, ppool)) { |
| 687 | return false; |
| 688 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 689 | } |
| 690 | } |
| 691 | |
| 692 | return true; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 697 | * flushed from the cache so the memory has been cleared across the system. |
| 698 | */ |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 699 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool, |
| 700 | uint32_t extra_mode_attributes) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 701 | { |
| 702 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 703 | * 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] | 704 | * global mapping of the whole range. Such an approach will limit |
| 705 | * the changes to stage-1 tables and will allow only local |
| 706 | * invalidation. |
| 707 | */ |
| 708 | bool ret; |
| 709 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 710 | void *ptr = mm_identity_map(stage1_locked, begin, end, |
| 711 | MM_MODE_W | (extra_mode_attributes & |
| 712 | plat_ffa_other_world_mode()), |
| 713 | ppool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 714 | size_t size = pa_difference(begin, end); |
| 715 | |
| 716 | if (!ptr) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 717 | goto fail; |
| 718 | } |
| 719 | |
| 720 | memset_s(ptr, size, 0, size); |
| 721 | arch_mm_flush_dcache(ptr, size); |
| 722 | mm_unmap(stage1_locked, begin, end, ppool); |
| 723 | |
| 724 | ret = true; |
| 725 | goto out; |
| 726 | |
| 727 | fail: |
| 728 | ret = false; |
| 729 | |
| 730 | out: |
| 731 | mm_unlock_stage1(&stage1_locked); |
| 732 | |
| 733 | return ret; |
| 734 | } |
| 735 | |
| 736 | /** |
| 737 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 738 | * flushed from the cache so the memory has been cleared across the system. |
| 739 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 740 | static bool ffa_clear_memory_constituents( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 741 | uint32_t security_state_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 742 | struct ffa_memory_region_constituent **fragments, |
| 743 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 744 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 745 | { |
| 746 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 747 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 748 | bool ret = false; |
| 749 | |
| 750 | /* |
| 751 | * Create a local pool so any freed memory can't be used by another |
| 752 | * thread. This is to ensure each constituent that is mapped can be |
| 753 | * unmapped again afterwards. |
| 754 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 755 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 756 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 757 | /* Iterate over the memory region constituents within each fragment. */ |
| 758 | for (i = 0; i < fragment_count; ++i) { |
| 759 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 760 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 761 | for (j = 0; j < fragment_constituent_counts[j]; ++j) { |
| 762 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 763 | paddr_t begin = |
| 764 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 765 | paddr_t end = pa_add(begin, size); |
| 766 | |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 767 | if (!clear_memory(begin, end, &local_page_pool, |
| 768 | security_state_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 769 | /* |
| 770 | * api_clear_memory will defrag on failure, so |
| 771 | * no need to do it here. |
| 772 | */ |
| 773 | goto out; |
| 774 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 775 | } |
| 776 | } |
| 777 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 778 | ret = true; |
| 779 | |
| 780 | out: |
| 781 | mpool_fini(&local_page_pool); |
| 782 | return ret; |
| 783 | } |
| 784 | |
| 785 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 786 | * 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] | 787 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 788 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 789 | * |
| 790 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 791 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 792 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 793 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 794 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 795 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 796 | * 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] | 797 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 798 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 799 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 800 | struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 801 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 802 | struct ffa_memory_region_constituent **fragments, |
| 803 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 804 | uint32_t share_func, struct ffa_memory_access *receivers, |
| 805 | uint32_t receivers_count, struct mpool *page_pool, bool clear, |
| 806 | uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 807 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 808 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 809 | uint32_t orig_from_mode; |
| 810 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 811 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 812 | struct ffa_value ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 813 | |
| 814 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 815 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 816 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 817 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 818 | for (i = 0; i < fragment_count; ++i) { |
| 819 | if (!is_aligned(fragments[i], 8)) { |
| 820 | dlog_verbose("Constituents not aligned.\n"); |
| 821 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 822 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 826 | * Check if the state transition is lawful for the sender, ensure that |
| 827 | * all constituents of a memory region being shared are at the same |
| 828 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 829 | */ |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 830 | ret = ffa_send_check_transition(from_locked, share_func, receivers, |
| 831 | receivers_count, &orig_from_mode, |
| 832 | fragments, fragment_constituent_counts, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 833 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 834 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 835 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 836 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 837 | } |
| 838 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 839 | if (orig_from_mode_ret != NULL) { |
| 840 | *orig_from_mode_ret = orig_from_mode; |
| 841 | } |
| 842 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 843 | /* |
| 844 | * Create a local pool so any freed memory can't be used by another |
| 845 | * thread. This is to ensure the original mapping can be restored if the |
| 846 | * clear fails. |
| 847 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 848 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 849 | |
| 850 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 851 | * First reserve all required memory for the new page table entries |
| 852 | * without committing, to make sure the entire operation will succeed |
| 853 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 854 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 855 | if (!ffa_region_group_identity_map( |
| 856 | from_locked, fragments, fragment_constituent_counts, |
| 857 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 858 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 859 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 860 | goto out; |
| 861 | } |
| 862 | |
| 863 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 864 | * Update the mapping for the sender. This won't allocate because the |
| 865 | * transaction was already prepared above, but may free pages in the |
| 866 | * case that a whole block is being unmapped that was previously |
| 867 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 868 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 869 | CHECK(ffa_region_group_identity_map( |
| 870 | from_locked, fragments, fragment_constituent_counts, |
| 871 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 872 | |
| 873 | /* 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] | 874 | if (clear && |
| 875 | !ffa_clear_memory_constituents( |
| 876 | plat_ffa_owner_world_mode(from_locked.vm->id), fragments, |
| 877 | fragment_constituent_counts, fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 878 | /* |
| 879 | * On failure, roll back by returning memory to the sender. This |
| 880 | * may allocate pages which were previously freed into |
| 881 | * `local_page_pool` by the call above, but will never allocate |
| 882 | * more pages than that so can never fail. |
| 883 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 884 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 885 | from_locked, fragments, fragment_constituent_counts, |
| 886 | fragment_count, orig_from_mode, &local_page_pool, |
| 887 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 888 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 889 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 890 | goto out; |
| 891 | } |
| 892 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 893 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 894 | |
| 895 | out: |
| 896 | mpool_fini(&local_page_pool); |
| 897 | |
| 898 | /* |
| 899 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 900 | * error) or merging entries into blocks where possible (on success). |
| 901 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 902 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 903 | |
| 904 | return ret; |
| 905 | } |
| 906 | |
| 907 | /** |
| 908 | * Validates and maps memory shared from one VM to another. |
| 909 | * |
| 910 | * This function requires the calling context to hold the <to> lock. |
| 911 | * |
| 912 | * Returns: |
| 913 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 914 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 915 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 916 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 917 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 918 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 919 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 920 | struct ffa_value ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 921 | struct vm_locked to_locked, ffa_vm_id_t from_id, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 922 | struct ffa_memory_region_constituent **fragments, |
| 923 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 924 | uint32_t memory_to_attributes, uint32_t share_func, bool clear, |
| 925 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 926 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 927 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 928 | uint32_t to_mode; |
| 929 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 930 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 931 | |
| 932 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 933 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 934 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 935 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 936 | for (i = 0; i < fragment_count; ++i) { |
| 937 | if (!is_aligned(fragments[i], 8)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 938 | dlog_verbose("Fragment not properly aligned.\n"); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 939 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 940 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* |
| 944 | * Check if the state transition is lawful for the recipient, and ensure |
| 945 | * that all constituents of the memory region being retrieved are at the |
| 946 | * same state. |
| 947 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 948 | ret = ffa_retrieve_check_transition( |
| 949 | to_locked, share_func, fragments, fragment_constituent_counts, |
| 950 | fragment_count, memory_to_attributes, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 951 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 952 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 953 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | /* |
| 957 | * Create a local pool so any freed memory can't be used by another |
| 958 | * thread. This is to ensure the original mapping can be restored if the |
| 959 | * clear fails. |
| 960 | */ |
| 961 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 962 | |
| 963 | /* |
| 964 | * First reserve all required memory for the new page table entries in |
| 965 | * the recipient page tables without committing, to make sure the entire |
| 966 | * operation will succeed without exhausting the page pool. |
| 967 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 968 | if (!ffa_region_group_identity_map( |
| 969 | to_locked, fragments, fragment_constituent_counts, |
| 970 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 971 | /* TODO: partial defrag of failed range. */ |
| 972 | dlog_verbose( |
| 973 | "Insufficient memory to update recipient page " |
| 974 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 975 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 976 | goto out; |
| 977 | } |
| 978 | |
| 979 | /* 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] | 980 | if (clear && |
| 981 | !ffa_clear_memory_constituents( |
| 982 | plat_ffa_owner_world_mode(from_id), fragments, |
| 983 | fragment_constituent_counts, fragment_count, page_pool)) { |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 984 | dlog_verbose("Couldn't clear constituents.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 985 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 986 | goto out; |
| 987 | } |
| 988 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 989 | /* |
| 990 | * Complete the transfer by mapping the memory into the recipient. This |
| 991 | * won't allocate because the transaction was already prepared above, so |
| 992 | * it doesn't need to use the `local_page_pool`. |
| 993 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 994 | CHECK(ffa_region_group_identity_map( |
| 995 | to_locked, fragments, fragment_constituent_counts, |
| 996 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 997 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 998 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 999 | |
| 1000 | out: |
| 1001 | mpool_fini(&local_page_pool); |
| 1002 | |
| 1003 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1004 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1005 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1006 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1007 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1008 | |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1012 | static struct ffa_value ffa_relinquish_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1013 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1014 | struct ffa_memory_region_constituent **fragments, |
| 1015 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1016 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1017 | { |
| 1018 | uint32_t orig_from_mode; |
| 1019 | uint32_t from_mode; |
| 1020 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1021 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1022 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1023 | ret = ffa_relinquish_check_transition( |
| 1024 | from_locked, &orig_from_mode, fragments, |
| 1025 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1026 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1027 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1028 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1029 | } |
| 1030 | |
| 1031 | /* |
| 1032 | * Create a local pool so any freed memory can't be used by another |
| 1033 | * thread. This is to ensure the original mapping can be restored if the |
| 1034 | * clear fails. |
| 1035 | */ |
| 1036 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1037 | |
| 1038 | /* |
| 1039 | * First reserve all required memory for the new page table entries |
| 1040 | * without committing, to make sure the entire operation will succeed |
| 1041 | * without exhausting the page pool. |
| 1042 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1043 | if (!ffa_region_group_identity_map( |
| 1044 | from_locked, fragments, fragment_constituent_counts, |
| 1045 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1046 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1047 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1048 | goto out; |
| 1049 | } |
| 1050 | |
| 1051 | /* |
| 1052 | * Update the mapping for the sender. This won't allocate because the |
| 1053 | * transaction was already prepared above, but may free pages in the |
| 1054 | * case that a whole block is being unmapped that was previously |
| 1055 | * partially mapped. |
| 1056 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1057 | CHECK(ffa_region_group_identity_map( |
| 1058 | from_locked, fragments, fragment_constituent_counts, |
| 1059 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1060 | |
| 1061 | /* 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] | 1062 | if (clear && |
| 1063 | !ffa_clear_memory_constituents( |
| 1064 | plat_ffa_owner_world_mode(from_locked.vm->id), fragments, |
| 1065 | fragment_constituent_counts, fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1066 | /* |
| 1067 | * On failure, roll back by returning memory to the sender. This |
| 1068 | * may allocate pages which were previously freed into |
| 1069 | * `local_page_pool` by the call above, but will never allocate |
| 1070 | * more pages than that so can never fail. |
| 1071 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1072 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1073 | from_locked, fragments, fragment_constituent_counts, |
| 1074 | fragment_count, orig_from_mode, &local_page_pool, |
| 1075 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1076 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1077 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1078 | goto out; |
| 1079 | } |
| 1080 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1081 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1082 | |
| 1083 | out: |
| 1084 | mpool_fini(&local_page_pool); |
| 1085 | |
| 1086 | /* |
| 1087 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1088 | * error) or merging entries into blocks where possible (on success). |
| 1089 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1090 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1091 | |
| 1092 | return ret; |
| 1093 | } |
| 1094 | |
| 1095 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1096 | * Complete a memory sending operation by checking that it is valid, updating |
| 1097 | * the sender page table, and then either marking the share state as having |
| 1098 | * completed sending (on success) or freeing it (on failure). |
| 1099 | * |
| 1100 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1101 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1102 | struct ffa_value ffa_memory_send_complete( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1103 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1104 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1105 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1106 | { |
| 1107 | struct ffa_memory_region *memory_region = share_state->memory_region; |
| 1108 | struct ffa_value ret; |
| 1109 | |
| 1110 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1111 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1112 | |
| 1113 | /* Check that state is valid in sender page table and update. */ |
| 1114 | ret = ffa_send_check_update( |
| 1115 | from_locked, share_state->fragments, |
| 1116 | share_state->fragment_constituent_counts, |
| 1117 | share_state->fragment_count, share_state->share_func, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1118 | memory_region->receivers, memory_region->receiver_count, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1119 | page_pool, memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
| 1120 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1121 | if (ret.func != FFA_SUCCESS_32) { |
| 1122 | /* |
| 1123 | * Free share state, it failed to send so it can't be retrieved. |
| 1124 | */ |
| 1125 | dlog_verbose("Complete failed, freeing share state.\n"); |
| 1126 | share_state_free(share_states, share_state, page_pool); |
| 1127 | return ret; |
| 1128 | } |
| 1129 | |
| 1130 | share_state->sending_complete = true; |
| 1131 | dlog_verbose("Marked sending complete.\n"); |
| 1132 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1133 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | /** |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1137 | * Check that the memory attributes match Hafnium expectations: |
| 1138 | * Normal Memory, Inner shareable, Write-Back Read-Allocate |
| 1139 | * Write-Allocate Cacheable. |
| 1140 | */ |
| 1141 | static struct ffa_value ffa_memory_attributes_validate( |
| 1142 | ffa_memory_access_permissions_t attributes) |
| 1143 | { |
| 1144 | enum ffa_memory_type memory_type; |
| 1145 | enum ffa_memory_cacheability cacheability; |
| 1146 | enum ffa_memory_shareability shareability; |
| 1147 | |
| 1148 | memory_type = ffa_get_memory_type_attr(attributes); |
| 1149 | if (memory_type != FFA_MEMORY_NORMAL_MEM) { |
| 1150 | dlog_verbose("Invalid memory type %#x, expected %#x.\n", |
| 1151 | memory_type, FFA_MEMORY_NORMAL_MEM); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1152 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1153 | } |
| 1154 | |
| 1155 | cacheability = ffa_get_memory_cacheability_attr(attributes); |
| 1156 | if (cacheability != FFA_MEMORY_CACHE_WRITE_BACK) { |
| 1157 | dlog_verbose("Invalid cacheability %#x, expected %#x.\n", |
| 1158 | cacheability, FFA_MEMORY_CACHE_WRITE_BACK); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1159 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | shareability = ffa_get_memory_shareability_attr(attributes); |
| 1163 | if (shareability != FFA_MEMORY_INNER_SHAREABLE) { |
| 1164 | dlog_verbose("Invalid shareability %#x, expected #%x.\n", |
| 1165 | shareability, FFA_MEMORY_INNER_SHAREABLE); |
Federico Recanati | 3d953f3 | 2022-02-17 09:31:29 +0100 | [diff] [blame] | 1166 | return ffa_error(FFA_DENIED); |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1170 | } |
| 1171 | |
| 1172 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1173 | * Check that the given `memory_region` represents a valid memory send request |
| 1174 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1175 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1176 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1177 | * 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] | 1178 | * not. |
| 1179 | */ |
J-Alves | 6665225 | 2022-07-06 09:49:51 +0100 | [diff] [blame] | 1180 | struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1181 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1182 | uint32_t memory_share_length, uint32_t fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1183 | uint32_t share_func) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1184 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1185 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1186 | uint32_t receivers_length; |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1187 | uint32_t composite_memory_region_offset; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1188 | uint32_t constituents_offset; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1189 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1190 | enum ffa_data_access data_access; |
| 1191 | enum ffa_instruction_access instruction_access; |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 1192 | struct ffa_value ret; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1193 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1194 | /* The sender must match the caller. */ |
| 1195 | if ((!vm_id_is_current_world(from_locked.vm->id) && |
| 1196 | vm_id_is_current_world(memory_region->sender)) || |
| 1197 | (vm_id_is_current_world(from_locked.vm->id) && |
| 1198 | memory_region->sender != from_locked.vm->id)) { |
| 1199 | dlog_verbose("Invalid memory sender ID.\n"); |
| 1200 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1201 | } |
| 1202 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1203 | /* |
| 1204 | * Ensure that the composite header is within the memory bounds and |
| 1205 | * doesn't overlap the first part of the message. |
| 1206 | */ |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1207 | receivers_length = sizeof(struct ffa_memory_access) * |
| 1208 | memory_region->receiver_count; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1209 | constituents_offset = |
| 1210 | ffa_composite_constituent_offset(memory_region, 0); |
Federico Recanati | 872cd69 | 2022-01-05 13:10:10 +0100 | [diff] [blame] | 1211 | composite_memory_region_offset = |
| 1212 | memory_region->receivers[0].composite_memory_region_offset; |
| 1213 | if ((composite_memory_region_offset == 0) || |
| 1214 | (composite_memory_region_offset < |
| 1215 | sizeof(struct ffa_memory_region) + receivers_length) || |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1216 | constituents_offset > fragment_length) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1217 | dlog_verbose( |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1218 | "Invalid composite memory region descriptor offset " |
| 1219 | "%d.\n", |
| 1220 | memory_region->receivers[0] |
| 1221 | .composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1222 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1223 | } |
| 1224 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1225 | composite = ffa_memory_region_get_composite(memory_region, 0); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1226 | |
| 1227 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1228 | * Ensure the number of constituents are within the memory bounds. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1229 | */ |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1230 | constituents_length = sizeof(struct ffa_memory_region_constituent) * |
| 1231 | composite->constituent_count; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1232 | if (memory_share_length != constituents_offset + constituents_length) { |
| 1233 | dlog_verbose("Invalid length %d or composite offset %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1234 | memory_share_length, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1235 | memory_region->receivers[0] |
| 1236 | .composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1237 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1238 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1239 | if (fragment_length < memory_share_length && |
| 1240 | fragment_length < HF_MAILBOX_SIZE) { |
| 1241 | dlog_warning( |
| 1242 | "Initial fragment length %d smaller than mailbox " |
| 1243 | "size.\n", |
| 1244 | fragment_length); |
| 1245 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1246 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1247 | /* |
| 1248 | * Clear is not allowed for memory sharing, as the sender still has |
| 1249 | * access to the memory. |
| 1250 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1251 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1252 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1253 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1254 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1258 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1259 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1260 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1261 | } |
| 1262 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1263 | /* Check that the permissions are valid, for each specified receiver. */ |
| 1264 | for (uint32_t i = 0U; i < memory_region->receiver_count; i++) { |
| 1265 | ffa_memory_access_permissions_t permissions = |
| 1266 | memory_region->receivers[i] |
| 1267 | .receiver_permissions.permissions; |
| 1268 | ffa_vm_id_t receiver_id = |
| 1269 | memory_region->receivers[i] |
| 1270 | .receiver_permissions.receiver; |
| 1271 | |
| 1272 | if (memory_region->sender == receiver_id) { |
| 1273 | dlog_verbose("Can't share memory with itself.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1274 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1275 | } |
Federico Recanati | 85090c4 | 2021-12-15 13:17:54 +0100 | [diff] [blame] | 1276 | |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1277 | for (uint32_t j = i + 1; j < memory_region->receiver_count; |
| 1278 | j++) { |
| 1279 | if (receiver_id == |
| 1280 | memory_region->receivers[j] |
| 1281 | .receiver_permissions.receiver) { |
| 1282 | dlog_verbose( |
| 1283 | "Repeated receiver(%x) in memory send " |
| 1284 | "operation.\n", |
| 1285 | memory_region->receivers[j] |
| 1286 | .receiver_permissions.receiver); |
| 1287 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | if (composite_memory_region_offset != |
| 1292 | memory_region->receivers[i] |
| 1293 | .composite_memory_region_offset) { |
| 1294 | dlog_verbose( |
| 1295 | "All ffa_memory_access should point to the " |
| 1296 | "same composite memory region offset.\n"); |
| 1297 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1298 | } |
| 1299 | |
| 1300 | data_access = ffa_get_data_access_attr(permissions); |
| 1301 | instruction_access = |
| 1302 | ffa_get_instruction_access_attr(permissions); |
| 1303 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1304 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
| 1305 | dlog_verbose( |
| 1306 | "Reserved value for receiver permissions " |
| 1307 | "%#x.\n", |
| 1308 | permissions); |
| 1309 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1310 | } |
| 1311 | if (instruction_access != |
| 1312 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
| 1313 | dlog_verbose( |
| 1314 | "Invalid instruction access permissions %#x " |
| 1315 | "for sending memory.\n", |
| 1316 | permissions); |
| 1317 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1318 | } |
| 1319 | if (share_func == FFA_MEM_SHARE_32) { |
| 1320 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1321 | dlog_verbose( |
| 1322 | "Invalid data access permissions %#x " |
| 1323 | "for sharing memory.\n", |
| 1324 | permissions); |
| 1325 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1326 | } |
| 1327 | /* |
| 1328 | * According to section 10.10.3 of the FF-A v1.1 EAC0 |
| 1329 | * spec, NX is required for share operations (but must |
| 1330 | * not be specified by the sender) so set it in the |
| 1331 | * copy that we store, ready to be returned to the |
| 1332 | * retriever. |
| 1333 | */ |
J-Alves | b19731a | 2022-06-20 17:30:33 +0100 | [diff] [blame] | 1334 | if (vm_id_is_current_world(receiver_id)) { |
| 1335 | ffa_set_instruction_access_attr( |
| 1336 | &permissions, |
| 1337 | FFA_INSTRUCTION_ACCESS_NX); |
| 1338 | memory_region->receivers[i] |
| 1339 | .receiver_permissions.permissions = |
| 1340 | permissions; |
| 1341 | } |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1342 | } |
| 1343 | if (share_func == FFA_MEM_LEND_32 && |
| 1344 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1345 | dlog_verbose( |
| 1346 | "Invalid data access permissions %#x for " |
| 1347 | "lending memory.\n", |
| 1348 | permissions); |
| 1349 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1350 | } |
| 1351 | |
| 1352 | if (share_func == FFA_MEM_DONATE_32 && |
| 1353 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
| 1354 | dlog_verbose( |
| 1355 | "Invalid data access permissions %#x for " |
| 1356 | "donating memory.\n", |
| 1357 | permissions); |
| 1358 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1359 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1360 | } |
| 1361 | |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1362 | /* |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1363 | * If a memory donate or lend with single borrower, the memory type |
| 1364 | * shall not be specified by the sender. |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1365 | */ |
J-Alves | 807794e | 2022-06-16 13:42:47 +0100 | [diff] [blame] | 1366 | if (share_func == FFA_MEM_DONATE_32 || |
| 1367 | (share_func == FFA_MEM_LEND_32 && |
| 1368 | memory_region->receiver_count == 1)) { |
| 1369 | if (ffa_get_memory_type_attr(memory_region->attributes) != |
| 1370 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 1371 | dlog_verbose( |
| 1372 | "Memory type shall not be specified by " |
| 1373 | "sender.\n"); |
| 1374 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1375 | } |
| 1376 | } else { |
| 1377 | /* |
| 1378 | * Check that sender's memory attributes match Hafnium |
| 1379 | * expectations: Normal Memory, Inner shareable, Write-Back |
| 1380 | * Read-Allocate Write-Allocate Cacheable. |
| 1381 | */ |
| 1382 | ret = ffa_memory_attributes_validate(memory_region->attributes); |
| 1383 | if (ret.func != FFA_SUCCESS_32) { |
| 1384 | return ret; |
| 1385 | } |
Federico Recanati | d937f5e | 2021-12-20 17:38:23 +0100 | [diff] [blame] | 1386 | } |
| 1387 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1388 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1389 | } |
| 1390 | |
| 1391 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1392 | * Gets the share state for continuing an operation to donate, lend or share |
| 1393 | * memory, and checks that it is a valid request. |
| 1394 | * |
| 1395 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1396 | * not. |
| 1397 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1398 | struct ffa_value ffa_memory_send_continue_validate( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1399 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
| 1400 | struct ffa_memory_share_state **share_state_ret, ffa_vm_id_t from_vm_id, |
| 1401 | struct mpool *page_pool) |
| 1402 | { |
| 1403 | struct ffa_memory_share_state *share_state; |
| 1404 | struct ffa_memory_region *memory_region; |
| 1405 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame] | 1406 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1407 | |
| 1408 | /* |
| 1409 | * Look up the share state by handle and make sure that the VM ID |
| 1410 | * matches. |
| 1411 | */ |
| 1412 | if (!get_share_state(share_states, handle, &share_state)) { |
| 1413 | dlog_verbose( |
| 1414 | "Invalid handle %#x for memory send continuation.\n", |
| 1415 | handle); |
| 1416 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1417 | } |
| 1418 | memory_region = share_state->memory_region; |
| 1419 | |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1420 | if (vm_id_is_current_world(from_vm_id) && |
| 1421 | memory_region->sender != from_vm_id) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1422 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1423 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1424 | } |
| 1425 | |
| 1426 | if (share_state->sending_complete) { |
| 1427 | dlog_verbose( |
| 1428 | "Sending of memory handle %#x is already complete.\n", |
| 1429 | handle); |
| 1430 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1431 | } |
| 1432 | |
| 1433 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1434 | /* |
| 1435 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1436 | * probably be increased. |
| 1437 | */ |
| 1438 | dlog_warning( |
| 1439 | "Too many fragments for memory share with handle %#x; " |
| 1440 | "only %d supported.\n", |
| 1441 | handle, MAX_FRAGMENTS); |
| 1442 | /* Free share state, as it's not possible to complete it. */ |
| 1443 | share_state_free(share_states, share_state, page_pool); |
| 1444 | return ffa_error(FFA_NO_MEMORY); |
| 1445 | } |
| 1446 | |
| 1447 | *share_state_ret = share_state; |
| 1448 | |
| 1449 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1450 | } |
| 1451 | |
| 1452 | /** |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1453 | * Checks if there is at least one receiver from the other world. |
| 1454 | */ |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1455 | bool memory_region_receivers_from_other_world( |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1456 | struct ffa_memory_region *memory_region) |
| 1457 | { |
| 1458 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 1459 | ffa_vm_id_t receiver = memory_region->receivers[i] |
| 1460 | .receiver_permissions.receiver; |
| 1461 | if (!vm_id_is_current_world(receiver)) { |
| 1462 | return true; |
| 1463 | } |
| 1464 | } |
| 1465 | return false; |
| 1466 | } |
| 1467 | |
| 1468 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1469 | * Validates a call to donate, lend or share memory to a non-other world VM and |
| 1470 | * then updates the stage-2 page tables. Specifically, check if the message |
| 1471 | * length and number of memory region constituents match, and if the transition |
| 1472 | * is valid for the type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1473 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1474 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1475 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1476 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1477 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1478 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1479 | * This function takes ownership of the `memory_region` passed in and will free |
| 1480 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1481 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1482 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1483 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1484 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1485 | uint32_t fragment_length, uint32_t share_func, |
| 1486 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1487 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1488 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1489 | struct share_states_locked share_states; |
| 1490 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1491 | |
| 1492 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1493 | * If there is an error validating the `memory_region` then we need to |
| 1494 | * free it because we own it but we won't be storing it in a share state |
| 1495 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1496 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1497 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1498 | memory_share_length, fragment_length, |
J-Alves | 363f572 | 2022-04-25 17:37:37 +0100 | [diff] [blame] | 1499 | share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1500 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1501 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1502 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1503 | } |
| 1504 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1505 | /* Set flag for share function, ready to be retrieved later. */ |
| 1506 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1507 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1508 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1509 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1510 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1511 | case FFA_MEM_LEND_32: |
| 1512 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1513 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1514 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1515 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1516 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1517 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1518 | } |
| 1519 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1520 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1521 | /* |
| 1522 | * Allocate a share state before updating the page table. Otherwise if |
| 1523 | * updating the page table succeeded but allocating the share state |
| 1524 | * failed then it would leave the memory in a state where nobody could |
| 1525 | * get it back. |
| 1526 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1527 | if (!allocate_share_state(share_states, share_func, memory_region, |
| 1528 | fragment_length, FFA_MEMORY_HANDLE_INVALID, |
| 1529 | &share_state)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1530 | dlog_verbose("Failed to allocate share state.\n"); |
| 1531 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1532 | ret = ffa_error(FFA_NO_MEMORY); |
| 1533 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1534 | } |
| 1535 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1536 | if (fragment_length == memory_share_length) { |
| 1537 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1538 | ret = ffa_memory_send_complete( |
| 1539 | from_locked, share_states, share_state, page_pool, |
| 1540 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1541 | } else { |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1542 | /* |
| 1543 | * Use sender ID from 'memory_region' assuming |
| 1544 | * that at this point it has been validated: |
| 1545 | * - MBZ at virtual FF-A instance. |
| 1546 | */ |
| 1547 | ffa_vm_id_t sender_to_ret = |
| 1548 | (from_locked.vm->id == HF_OTHER_WORLD_ID) |
| 1549 | ? memory_region->sender |
| 1550 | : 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1551 | ret = (struct ffa_value){ |
| 1552 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1553 | .arg1 = (uint32_t)memory_region->handle, |
| 1554 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
J-Alves | fdd2927 | 2022-07-19 13:16:31 +0100 | [diff] [blame^] | 1555 | .arg3 = fragment_length, |
| 1556 | .arg4 = (uint32_t)(sender_to_ret & 0xffff) << 16}; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1557 | } |
| 1558 | |
| 1559 | out: |
| 1560 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1561 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1562 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1563 | } |
| 1564 | |
| 1565 | /** |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1566 | * Continues an operation to donate, lend or share memory to a VM from current |
| 1567 | * world. If this is the last fragment then checks that the transition is valid |
| 1568 | * for the type of memory sending operation and updates the stage-2 page tables |
| 1569 | * of the sender. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1570 | * |
| 1571 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1572 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1573 | * allocated page from Hafnium's internal pool. |
| 1574 | * |
| 1575 | * This function takes ownership of the `fragment` passed in; it must not be |
| 1576 | * freed by the caller. |
| 1577 | */ |
| 1578 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 1579 | void *fragment, |
| 1580 | uint32_t fragment_length, |
| 1581 | ffa_memory_handle_t handle, |
| 1582 | struct mpool *page_pool) |
| 1583 | { |
| 1584 | struct share_states_locked share_states = share_states_lock(); |
| 1585 | struct ffa_memory_share_state *share_state; |
| 1586 | struct ffa_value ret; |
| 1587 | struct ffa_memory_region *memory_region; |
| 1588 | |
| 1589 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1590 | &share_state, |
| 1591 | from_locked.vm->id, page_pool); |
| 1592 | if (ret.func != FFA_SUCCESS_32) { |
| 1593 | goto out_free_fragment; |
| 1594 | } |
| 1595 | memory_region = share_state->memory_region; |
| 1596 | |
J-Alves | 95df0ef | 2022-12-07 10:09:48 +0000 | [diff] [blame] | 1597 | if (memory_region_receivers_from_other_world(memory_region)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1598 | dlog_error( |
| 1599 | "Got hypervisor-allocated handle for memory send to " |
J-Alves | 8505a8a | 2022-06-15 18:10:18 +0100 | [diff] [blame] | 1600 | "other world. This should never happen, and indicates " |
| 1601 | "a bug in " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1602 | "EL3 code.\n"); |
| 1603 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1604 | goto out_free_fragment; |
| 1605 | } |
| 1606 | |
| 1607 | /* Add this fragment. */ |
| 1608 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1609 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1610 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1611 | share_state->fragment_count++; |
| 1612 | |
| 1613 | /* Check whether the memory send operation is now ready to complete. */ |
| 1614 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1615 | ret = ffa_memory_send_complete( |
| 1616 | from_locked, share_states, share_state, page_pool, |
| 1617 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1618 | } else { |
| 1619 | ret = (struct ffa_value){ |
| 1620 | .func = FFA_MEM_FRAG_RX_32, |
| 1621 | .arg1 = (uint32_t)handle, |
| 1622 | .arg2 = (uint32_t)(handle >> 32), |
| 1623 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1624 | share_state)}; |
| 1625 | } |
| 1626 | goto out; |
| 1627 | |
| 1628 | out_free_fragment: |
| 1629 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1630 | |
| 1631 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1632 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1633 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1634 | } |
| 1635 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1636 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 1637 | static void ffa_memory_retrieve_complete( |
| 1638 | struct share_states_locked share_states, |
| 1639 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 1640 | { |
| 1641 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 1642 | /* |
| 1643 | * Memory that has been donated can't be relinquished, |
| 1644 | * so no need to keep the share state around. |
| 1645 | */ |
| 1646 | share_state_free(share_states, share_state, page_pool); |
| 1647 | dlog_verbose("Freed share state for donate.\n"); |
| 1648 | } |
| 1649 | } |
| 1650 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1651 | /* |
| 1652 | * Gets the receiver's access permissions from 'struct ffa_memory_region' and |
| 1653 | * returns its index in the receiver's array. If receiver's ID doesn't exist |
| 1654 | * in the array, return the region's 'receiver_count'. |
| 1655 | */ |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 1656 | uint32_t ffa_memory_region_get_receiver(struct ffa_memory_region *memory_region, |
| 1657 | ffa_vm_id_t receiver) |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 1658 | { |
| 1659 | struct ffa_memory_access *receivers; |
| 1660 | uint32_t i; |
| 1661 | |
| 1662 | assert(memory_region != NULL); |
| 1663 | |
| 1664 | receivers = memory_region->receivers; |
| 1665 | |
| 1666 | for (i = 0U; i < memory_region->receiver_count; i++) { |
| 1667 | if (receivers[i].receiver_permissions.receiver == receiver) { |
| 1668 | break; |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | return i; |
| 1673 | } |
| 1674 | |
| 1675 | /** |
| 1676 | * Validates the retrieved permissions against those specified by the lender |
| 1677 | * of memory share operation. Optionally can help set the permissions to be used |
| 1678 | * for the S2 mapping, through the `permissions` argument. |
| 1679 | * Returns true if permissions are valid, false otherwise. |
| 1680 | */ |
| 1681 | static bool ffa_memory_retrieve_is_memory_access_valid( |
| 1682 | enum ffa_data_access sent_data_access, |
| 1683 | enum ffa_data_access requested_data_access, |
| 1684 | enum ffa_instruction_access sent_instruction_access, |
| 1685 | enum ffa_instruction_access requested_instruction_access, |
| 1686 | ffa_memory_access_permissions_t *permissions) |
| 1687 | { |
| 1688 | switch (sent_data_access) { |
| 1689 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 1690 | case FFA_DATA_ACCESS_RW: |
| 1691 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 1692 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 1693 | if (permissions != NULL) { |
| 1694 | ffa_set_data_access_attr(permissions, |
| 1695 | FFA_DATA_ACCESS_RW); |
| 1696 | } |
| 1697 | break; |
| 1698 | } |
| 1699 | /* Intentional fall-through. */ |
| 1700 | case FFA_DATA_ACCESS_RO: |
| 1701 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 1702 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 1703 | if (permissions != NULL) { |
| 1704 | ffa_set_data_access_attr(permissions, |
| 1705 | FFA_DATA_ACCESS_RO); |
| 1706 | } |
| 1707 | break; |
| 1708 | } |
| 1709 | dlog_verbose( |
| 1710 | "Invalid data access requested; sender specified " |
| 1711 | "permissions %#x but receiver requested %#x.\n", |
| 1712 | sent_data_access, requested_data_access); |
| 1713 | return false; |
| 1714 | case FFA_DATA_ACCESS_RESERVED: |
| 1715 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
| 1716 | "checked before this point."); |
| 1717 | } |
| 1718 | |
| 1719 | switch (sent_instruction_access) { |
| 1720 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 1721 | case FFA_INSTRUCTION_ACCESS_X: |
| 1722 | if (requested_instruction_access == |
| 1723 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 1724 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
| 1725 | if (permissions != NULL) { |
| 1726 | ffa_set_instruction_access_attr( |
| 1727 | permissions, FFA_INSTRUCTION_ACCESS_X); |
| 1728 | } |
| 1729 | break; |
| 1730 | } |
| 1731 | case FFA_INSTRUCTION_ACCESS_NX: |
| 1732 | if (requested_instruction_access == |
| 1733 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 1734 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 1735 | if (permissions != NULL) { |
| 1736 | ffa_set_instruction_access_attr( |
| 1737 | permissions, FFA_INSTRUCTION_ACCESS_NX); |
| 1738 | } |
| 1739 | break; |
| 1740 | } |
| 1741 | dlog_verbose( |
| 1742 | "Invalid instruction access requested; sender " |
| 1743 | "specified permissions %#x but receiver requested " |
| 1744 | "%#x.\n", |
| 1745 | sent_instruction_access, requested_instruction_access); |
| 1746 | return false; |
| 1747 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 1748 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
| 1749 | "be checked before this point."); |
| 1750 | } |
| 1751 | |
| 1752 | return true; |
| 1753 | } |
| 1754 | |
| 1755 | /** |
| 1756 | * Validate the receivers' permissions in the retrieve request against those |
| 1757 | * specified by the lender. |
| 1758 | * In the `permissions` argument returns the permissions to set at S2 for the |
| 1759 | * caller to the FFA_MEMORY_RETRIEVE_REQ. |
| 1760 | * Returns FFA_SUCCESS if all specified permissions are valid. |
| 1761 | */ |
| 1762 | static struct ffa_value ffa_memory_retrieve_validate_memory_access_list( |
| 1763 | struct ffa_memory_region *memory_region, |
| 1764 | struct ffa_memory_region *retrieve_request, ffa_vm_id_t to_vm_id, |
| 1765 | ffa_memory_access_permissions_t *permissions) |
| 1766 | { |
| 1767 | uint32_t retrieve_receiver_index; |
| 1768 | |
| 1769 | assert(permissions != NULL); |
| 1770 | |
| 1771 | if (retrieve_request->receiver_count != memory_region->receiver_count) { |
| 1772 | dlog_verbose( |
| 1773 | "Retrieve request should contain same list of " |
| 1774 | "borrowers, as specified by the lender.\n"); |
| 1775 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1776 | } |
| 1777 | |
| 1778 | retrieve_receiver_index = retrieve_request->receiver_count; |
| 1779 | |
| 1780 | /* Should be populated with the permissions of the retriever. */ |
| 1781 | *permissions = 0; |
| 1782 | |
| 1783 | for (uint32_t i = 0U; i < retrieve_request->receiver_count; i++) { |
| 1784 | ffa_memory_access_permissions_t sent_permissions; |
| 1785 | struct ffa_memory_access *current_receiver = |
| 1786 | &retrieve_request->receivers[i]; |
| 1787 | ffa_memory_access_permissions_t requested_permissions = |
| 1788 | current_receiver->receiver_permissions.permissions; |
| 1789 | ffa_vm_id_t current_receiver_id = |
| 1790 | current_receiver->receiver_permissions.receiver; |
| 1791 | bool found_to_id = current_receiver_id == to_vm_id; |
| 1792 | |
| 1793 | /* |
| 1794 | * Find the current receiver in the transaction descriptor from |
| 1795 | * sender. |
| 1796 | */ |
| 1797 | uint32_t mem_region_receiver_index = |
| 1798 | ffa_memory_region_get_receiver(memory_region, |
| 1799 | current_receiver_id); |
| 1800 | |
| 1801 | if (mem_region_receiver_index == |
| 1802 | memory_region->receiver_count) { |
| 1803 | dlog_verbose("%s: receiver %x not found\n", __func__, |
| 1804 | current_receiver_id); |
| 1805 | return ffa_error(FFA_DENIED); |
| 1806 | } |
| 1807 | |
| 1808 | sent_permissions = |
| 1809 | memory_region->receivers[mem_region_receiver_index] |
| 1810 | .receiver_permissions.permissions; |
| 1811 | |
| 1812 | if (found_to_id) { |
| 1813 | retrieve_receiver_index = i; |
| 1814 | } |
| 1815 | |
| 1816 | /* |
| 1817 | * Since we are traversing the list of receivers, save the index |
| 1818 | * of the caller. As it needs to be there. |
| 1819 | */ |
| 1820 | |
| 1821 | if (current_receiver->composite_memory_region_offset != 0U) { |
| 1822 | dlog_verbose( |
| 1823 | "Retriever specified address ranges not " |
| 1824 | "supported (got offset %d).\n", |
| 1825 | current_receiver |
| 1826 | ->composite_memory_region_offset); |
| 1827 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1828 | } |
| 1829 | |
| 1830 | /* |
| 1831 | * Check permissions from sender against permissions requested |
| 1832 | * by receiver. |
| 1833 | */ |
| 1834 | if (!ffa_memory_retrieve_is_memory_access_valid( |
| 1835 | ffa_get_data_access_attr(sent_permissions), |
| 1836 | ffa_get_data_access_attr(requested_permissions), |
| 1837 | ffa_get_instruction_access_attr(sent_permissions), |
| 1838 | ffa_get_instruction_access_attr( |
| 1839 | requested_permissions), |
| 1840 | found_to_id ? permissions : NULL)) { |
| 1841 | return ffa_error(FFA_DENIED); |
| 1842 | } |
| 1843 | |
| 1844 | /* |
| 1845 | * Can't request PM to clear memory if only provided with RO |
| 1846 | * permissions. |
| 1847 | */ |
| 1848 | if (found_to_id && |
| 1849 | (ffa_get_data_access_attr(*permissions) == |
| 1850 | FFA_DATA_ACCESS_RO) && |
| 1851 | (retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != |
| 1852 | 0U) { |
| 1853 | dlog_verbose( |
| 1854 | "Receiver has RO permissions can not request " |
| 1855 | "clear.\n"); |
| 1856 | return ffa_error(FFA_DENIED); |
| 1857 | } |
| 1858 | } |
| 1859 | |
| 1860 | if (retrieve_receiver_index == retrieve_request->receiver_count) { |
| 1861 | dlog_verbose( |
| 1862 | "Retrieve request does not contain caller's (%x) " |
| 1863 | "permissions\n", |
| 1864 | to_vm_id); |
| 1865 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1866 | } |
| 1867 | |
| 1868 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1869 | } |
| 1870 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 1871 | /* |
| 1872 | * According to section 16.4.3 of FF-A v1.1 EAC0 specification, the hypervisor |
| 1873 | * may issue an FFA_MEM_RETRIEVE_REQ to obtain the memory region description |
| 1874 | * of a pending memory sharing operation whose allocator is the SPM, for |
| 1875 | * validation purposes before forwarding an FFA_MEM_RECLAIM call. In doing so |
| 1876 | * the memory region descriptor of the retrieve request must be zeroed with the |
| 1877 | * exception of the sender ID and handle. |
| 1878 | */ |
| 1879 | bool is_ffa_memory_retrieve_borrower_request(struct ffa_memory_region *request, |
| 1880 | struct vm_locked to_locked) |
| 1881 | { |
| 1882 | return to_locked.vm->id == HF_HYPERVISOR_VM_ID && |
| 1883 | request->attributes == 0U && request->flags == 0U && |
| 1884 | request->tag == 0U && request->receiver_count == 0U && |
| 1885 | plat_ffa_memory_handle_allocated_by_current_world( |
| 1886 | request->handle); |
| 1887 | } |
| 1888 | |
| 1889 | /* |
| 1890 | * Helper to reset count of fragments retrieved by the hypervisor. |
| 1891 | */ |
| 1892 | static void ffa_memory_retrieve_complete_from_hyp( |
| 1893 | struct ffa_memory_share_state *share_state) |
| 1894 | { |
| 1895 | if (share_state->hypervisor_fragment_count == |
| 1896 | share_state->fragment_count) { |
| 1897 | share_state->hypervisor_fragment_count = 0; |
| 1898 | } |
| 1899 | } |
| 1900 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 1901 | /** |
| 1902 | * Validate that the memory region descriptor provided by the borrower on |
| 1903 | * FFA_MEM_RETRIEVE_REQ, against saved memory region provided by lender at the |
| 1904 | * memory sharing call. |
| 1905 | */ |
| 1906 | static struct ffa_value ffa_memory_retrieve_validate( |
| 1907 | ffa_vm_id_t receiver_id, struct ffa_memory_region *retrieve_request, |
| 1908 | struct ffa_memory_region *memory_region, uint32_t *receiver_index, |
| 1909 | uint32_t share_func) |
| 1910 | { |
| 1911 | ffa_memory_region_flags_t transaction_type = |
| 1912 | retrieve_request->flags & |
| 1913 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
| 1914 | |
| 1915 | assert(retrieve_request != NULL); |
| 1916 | assert(memory_region != NULL); |
| 1917 | assert(receiver_index != NULL); |
| 1918 | assert(retrieve_request->sender == memory_region->sender); |
| 1919 | |
| 1920 | /* |
| 1921 | * Check that the transaction type expected by the receiver is |
| 1922 | * correct, if it has been specified. |
| 1923 | */ |
| 1924 | if (transaction_type != |
| 1925 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
| 1926 | transaction_type != (memory_region->flags & |
| 1927 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
| 1928 | dlog_verbose( |
| 1929 | "Incorrect transaction type %#x for " |
| 1930 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
| 1931 | transaction_type, |
| 1932 | memory_region->flags & |
| 1933 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
| 1934 | retrieve_request->handle); |
| 1935 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1936 | } |
| 1937 | |
| 1938 | if (retrieve_request->tag != memory_region->tag) { |
| 1939 | dlog_verbose( |
| 1940 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
| 1941 | "%d for handle %#x.\n", |
| 1942 | retrieve_request->tag, memory_region->tag, |
| 1943 | retrieve_request->handle); |
| 1944 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1945 | } |
| 1946 | |
| 1947 | *receiver_index = |
| 1948 | ffa_memory_region_get_receiver(memory_region, receiver_id); |
| 1949 | |
| 1950 | if (*receiver_index == memory_region->receiver_count) { |
| 1951 | dlog_verbose( |
| 1952 | "Incorrect receiver VM ID %d for " |
| 1953 | "FFA_MEM_RETRIEVE_REQ, for handle %#x.\n", |
| 1954 | receiver_id, handle); |
| 1955 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1956 | } |
| 1957 | |
| 1958 | if ((retrieve_request->flags & |
| 1959 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_VALID) != 0U) { |
| 1960 | dlog_verbose( |
| 1961 | "Retriever specified 'address range alignment 'hint' " |
| 1962 | "not supported.\n"); |
| 1963 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1964 | } |
| 1965 | if ((retrieve_request->flags & |
| 1966 | FFA_MEMORY_REGION_ADDRESS_RANGE_HINT_MASK) != 0) { |
| 1967 | dlog_verbose( |
| 1968 | "Bits 8-5 must be zero in memory region's flags " |
| 1969 | "(address range alignment hint not supported).\n"); |
| 1970 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1971 | } |
| 1972 | |
| 1973 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 1974 | dlog_verbose( |
| 1975 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 1976 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1977 | } |
| 1978 | |
| 1979 | if (share_func == FFA_MEM_SHARE_32 && |
| 1980 | (retrieve_request->flags & |
| 1981 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 1982 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 1983 | dlog_verbose( |
| 1984 | "Memory Share operation can't clean after relinquish " |
| 1985 | "memory region.\n"); |
| 1986 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1987 | } |
| 1988 | |
| 1989 | /* |
| 1990 | * If the borrower needs the memory to be cleared before mapping |
| 1991 | * to its address space, the sender should have set the flag |
| 1992 | * when calling FFA_MEM_LEND/FFA_MEM_DONATE, else return |
| 1993 | * FFA_DENIED. |
| 1994 | */ |
| 1995 | if ((retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U && |
| 1996 | (memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) == 0U) { |
| 1997 | dlog_verbose( |
| 1998 | "Borrower needs memory cleared. Sender needs to set " |
| 1999 | "flag for clearing memory.\n"); |
| 2000 | return ffa_error(FFA_DENIED); |
| 2001 | } |
| 2002 | |
| 2003 | /* |
| 2004 | * If memory type is not specified, bypass validation of memory |
| 2005 | * attributes in the retrieve request. The retriever is expecting to |
| 2006 | * obtain this information from the SPMC. |
| 2007 | */ |
| 2008 | if (ffa_get_memory_type_attr(retrieve_request->attributes) == |
| 2009 | FFA_MEMORY_NOT_SPECIFIED_MEM) { |
| 2010 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 2011 | } |
| 2012 | |
| 2013 | /* |
| 2014 | * Ensure receiver's attributes are compatible with how |
| 2015 | * Hafnium maps memory: Normal Memory, Inner shareable, |
| 2016 | * Write-Back Read-Allocate Write-Allocate Cacheable. |
| 2017 | */ |
| 2018 | return ffa_memory_attributes_validate(retrieve_request->attributes); |
| 2019 | } |
| 2020 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2021 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 2022 | struct ffa_memory_region *retrieve_request, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2023 | uint32_t retrieve_request_length, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2024 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2025 | { |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2026 | uint32_t expected_retrieve_request_length = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2027 | sizeof(struct ffa_memory_region) + |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2028 | retrieve_request->receiver_count * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2029 | sizeof(struct ffa_memory_access); |
| 2030 | ffa_memory_handle_t handle = retrieve_request->handle; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2031 | struct ffa_memory_region *memory_region; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2032 | ffa_memory_access_permissions_t permissions = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2033 | uint32_t memory_to_attributes; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2034 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2035 | struct ffa_memory_share_state *share_state; |
| 2036 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2037 | struct ffa_composite_memory_region *composite; |
| 2038 | uint32_t total_length; |
| 2039 | uint32_t fragment_length; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2040 | ffa_vm_id_t receiver_id = to_locked.vm->id; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2041 | bool is_send_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2042 | |
| 2043 | dump_share_states(); |
| 2044 | |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2045 | if (retrieve_request_length != expected_retrieve_request_length) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2046 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2047 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2048 | "but was %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2049 | expected_retrieve_request_length, |
| 2050 | retrieve_request_length); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2051 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2052 | } |
| 2053 | |
| 2054 | share_states = share_states_lock(); |
| 2055 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2056 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2057 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2058 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2059 | goto out; |
| 2060 | } |
| 2061 | |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2062 | if (!share_state->sending_complete) { |
| 2063 | dlog_verbose( |
| 2064 | "Memory with handle %#x not fully sent, can't " |
| 2065 | "retrieve.\n", |
| 2066 | handle); |
| 2067 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2068 | goto out; |
| 2069 | } |
| 2070 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2071 | memory_region = share_state->memory_region; |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2072 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2073 | CHECK(memory_region != NULL); |
| 2074 | |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2075 | if (retrieve_request->sender != memory_region->sender) { |
| 2076 | dlog_verbose( |
| 2077 | "Memory with handle %#x not fully sent, can't " |
| 2078 | "retrieve.\n", |
| 2079 | handle); |
| 2080 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2081 | goto out; |
| 2082 | } |
J-Alves | 96de29f | 2022-04-26 16:05:24 +0100 | [diff] [blame] | 2083 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2084 | if (!is_ffa_memory_retrieve_borrower_request(retrieve_request, |
| 2085 | to_locked)) { |
| 2086 | uint32_t receiver_index; |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2087 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2088 | /* |
| 2089 | * The SPMC can only process retrieve requests to memory share |
| 2090 | * operations with one borrower from the other world. It can't |
| 2091 | * determine the ID of the NWd VM that invoked the retrieve |
| 2092 | * request interface call. It relies on the hypervisor to |
| 2093 | * validate the caller's ID against that provided in the |
| 2094 | * `receivers` list of the retrieve response. |
| 2095 | * In case there is only one borrower from the NWd in the |
| 2096 | * transaction descriptor, record that in the `receiver_id` for |
| 2097 | * later use, and validate in the retrieve request message. |
| 2098 | */ |
| 2099 | if (to_locked.vm->id == HF_HYPERVISOR_VM_ID) { |
| 2100 | uint32_t other_world_count = 0; |
| 2101 | |
| 2102 | for (uint32_t i = 0; i < memory_region->receiver_count; |
| 2103 | i++) { |
| 2104 | receiver_id = |
| 2105 | retrieve_request->receivers[0] |
| 2106 | .receiver_permissions.receiver; |
| 2107 | if (!vm_id_is_current_world(receiver_id)) { |
| 2108 | other_world_count++; |
| 2109 | } |
| 2110 | } |
| 2111 | if (other_world_count > 1) { |
| 2112 | dlog_verbose( |
| 2113 | "Support one receiver from the other " |
| 2114 | "world.\n"); |
| 2115 | return ffa_error(FFA_NOT_SUPPORTED); |
| 2116 | } |
| 2117 | } |
| 2118 | |
| 2119 | /* |
| 2120 | * Validate retrieve request, according to what was sent by the |
| 2121 | * sender. Function will output the `receiver_index` from the |
| 2122 | * provided memory region, and will output `permissions` from |
| 2123 | * the validated requested permissions. |
| 2124 | */ |
J-Alves | 089004f | 2022-07-13 14:25:44 +0100 | [diff] [blame] | 2125 | ret = ffa_memory_retrieve_validate( |
| 2126 | receiver_id, retrieve_request, memory_region, |
| 2127 | &receiver_index, share_state->share_func); |
| 2128 | if (ret.func != FFA_SUCCESS_32) { |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2129 | goto out; |
| 2130 | } |
| 2131 | |
| 2132 | if (share_state->retrieved_fragment_count[receiver_index] != |
| 2133 | 0U) { |
| 2134 | dlog_verbose( |
| 2135 | "Memory with handle %#x already retrieved.\n", |
| 2136 | handle); |
| 2137 | ret = ffa_error(FFA_DENIED); |
| 2138 | goto out; |
| 2139 | } |
| 2140 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2141 | ret = ffa_memory_retrieve_validate_memory_access_list( |
| 2142 | memory_region, retrieve_request, receiver_id, |
| 2143 | &permissions); |
J-Alves | 614d9f4 | 2022-06-28 14:03:10 +0100 | [diff] [blame] | 2144 | if (ret.func != FFA_SUCCESS_32) { |
| 2145 | goto out; |
| 2146 | } |
Federico Recanati | a98603a | 2021-12-20 18:04:03 +0100 | [diff] [blame] | 2147 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2148 | memory_to_attributes = ffa_memory_permissions_to_mode( |
| 2149 | permissions, share_state->sender_orig_mode); |
| 2150 | ret = ffa_retrieve_check_update( |
| 2151 | to_locked, memory_region->sender, |
| 2152 | share_state->fragments, |
| 2153 | share_state->fragment_constituent_counts, |
| 2154 | share_state->fragment_count, memory_to_attributes, |
| 2155 | share_state->share_func, false, page_pool); |
| 2156 | |
| 2157 | if (ret.func != FFA_SUCCESS_32) { |
| 2158 | goto out; |
| 2159 | } |
| 2160 | |
| 2161 | share_state->retrieved_fragment_count[receiver_index] = 1; |
| 2162 | is_send_complete = |
| 2163 | share_state->retrieved_fragment_count[receiver_index] == |
| 2164 | share_state->fragment_count; |
| 2165 | } else { |
| 2166 | if (share_state->hypervisor_fragment_count != 0U) { |
| 2167 | dlog_verbose( |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2168 | "Memory with handle %#x already retrieved by " |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2169 | "the hypervisor.\n", |
| 2170 | handle); |
| 2171 | ret = ffa_error(FFA_DENIED); |
| 2172 | goto out; |
| 2173 | } |
| 2174 | |
| 2175 | share_state->hypervisor_fragment_count = 1; |
| 2176 | |
| 2177 | ffa_memory_retrieve_complete_from_hyp(share_state); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2178 | } |
| 2179 | |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2180 | /* VMs acquire the RX buffer from SPMC. */ |
| 2181 | CHECK(plat_ffa_acquire_receiver_rx(to_locked, &ret)); |
| 2182 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2183 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2184 | * Copy response to RX buffer of caller and deliver the message. |
| 2185 | * This must be done before the share_state is (possibly) freed. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2186 | */ |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2187 | /* TODO: combine attributes from sender and request. */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2188 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2189 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2190 | * Constituents which we received in the first fragment should |
| 2191 | * always fit in the first fragment we are sending, because the |
| 2192 | * header is the same size in both cases and we have a fixed |
| 2193 | * message buffer size. So `ffa_retrieved_memory_region_init` |
| 2194 | * should never fail. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2195 | */ |
| 2196 | CHECK(ffa_retrieved_memory_region_init( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2197 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2198 | memory_region->sender, memory_region->attributes, |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2199 | memory_region->flags, handle, receiver_id, permissions, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2200 | composite->page_count, composite->constituent_count, |
| 2201 | share_state->fragments[0], |
| 2202 | share_state->fragment_constituent_counts[0], &total_length, |
| 2203 | &fragment_length)); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2204 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2205 | to_locked.vm->mailbox.recv_size = fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2206 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2207 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2208 | to_locked.vm->mailbox.state = MAILBOX_STATE_READ; |
| 2209 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2210 | if (is_send_complete) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2211 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2212 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2213 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2214 | ret = (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2215 | .arg1 = total_length, |
| 2216 | .arg2 = fragment_length}; |
| 2217 | |
| 2218 | out: |
| 2219 | share_states_unlock(&share_states); |
| 2220 | dump_share_states(); |
| 2221 | return ret; |
| 2222 | } |
| 2223 | |
| 2224 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 2225 | ffa_memory_handle_t handle, |
| 2226 | uint32_t fragment_offset, |
| 2227 | struct mpool *page_pool) |
| 2228 | { |
| 2229 | struct ffa_memory_region *memory_region; |
| 2230 | struct share_states_locked share_states; |
| 2231 | struct ffa_memory_share_state *share_state; |
| 2232 | struct ffa_value ret; |
| 2233 | uint32_t fragment_index; |
| 2234 | uint32_t retrieved_constituents_count; |
| 2235 | uint32_t i; |
| 2236 | uint32_t expected_fragment_offset; |
| 2237 | uint32_t remaining_constituent_count; |
| 2238 | uint32_t fragment_length; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2239 | uint32_t receiver_index; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2240 | |
| 2241 | dump_share_states(); |
| 2242 | |
| 2243 | share_states = share_states_lock(); |
| 2244 | if (!get_share_state(share_states, handle, &share_state)) { |
| 2245 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 2246 | handle); |
| 2247 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2248 | goto out; |
| 2249 | } |
| 2250 | |
| 2251 | memory_region = share_state->memory_region; |
| 2252 | CHECK(memory_region != NULL); |
| 2253 | |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2254 | receiver_index = |
| 2255 | ffa_memory_region_get_receiver(memory_region, to_locked.vm->id); |
| 2256 | |
| 2257 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2258 | dlog_verbose( |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2259 | "Caller of FFA_MEM_FRAG_RX (%x) is not a borrower to " |
| 2260 | "memory sharing transaction (%x)\n", |
| 2261 | to_locked.vm->id, handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2262 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2263 | goto out; |
| 2264 | } |
| 2265 | |
| 2266 | if (!share_state->sending_complete) { |
| 2267 | dlog_verbose( |
| 2268 | "Memory with handle %#x not fully sent, can't " |
| 2269 | "retrieve.\n", |
| 2270 | handle); |
| 2271 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2272 | goto out; |
| 2273 | } |
| 2274 | |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2275 | if (share_state->retrieved_fragment_count[receiver_index] == 0 || |
| 2276 | share_state->retrieved_fragment_count[receiver_index] >= |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2277 | share_state->fragment_count) { |
| 2278 | dlog_verbose( |
| 2279 | "Retrieval of memory with handle %#x not yet started " |
| 2280 | "or already completed (%d/%d fragments retrieved).\n", |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2281 | handle, |
| 2282 | share_state->retrieved_fragment_count[receiver_index], |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2283 | share_state->fragment_count); |
| 2284 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2285 | goto out; |
| 2286 | } |
| 2287 | |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2288 | fragment_index = share_state->retrieved_fragment_count[receiver_index]; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2289 | |
| 2290 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2291 | * Check that the given fragment offset is correct by counting |
| 2292 | * how many constituents were in the fragments previously sent. |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2293 | */ |
| 2294 | retrieved_constituents_count = 0; |
| 2295 | for (i = 0; i < fragment_index; ++i) { |
| 2296 | retrieved_constituents_count += |
| 2297 | share_state->fragment_constituent_counts[i]; |
| 2298 | } |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2299 | |
| 2300 | CHECK(memory_region->receiver_count > 0); |
| 2301 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2302 | expected_fragment_offset = |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2303 | ffa_composite_constituent_offset(memory_region, |
| 2304 | receiver_index) + |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2305 | retrieved_constituents_count * |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2306 | sizeof(struct ffa_memory_region_constituent) - |
| 2307 | sizeof(struct ffa_memory_access) * |
| 2308 | (memory_region->receiver_count - 1); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2309 | if (fragment_offset != expected_fragment_offset) { |
| 2310 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 2311 | fragment_offset, expected_fragment_offset); |
| 2312 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2313 | goto out; |
| 2314 | } |
| 2315 | |
| 2316 | remaining_constituent_count = ffa_memory_fragment_init( |
| 2317 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2318 | share_state->fragments[fragment_index], |
| 2319 | share_state->fragment_constituent_counts[fragment_index], |
| 2320 | &fragment_length); |
| 2321 | CHECK(remaining_constituent_count == 0); |
| 2322 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 2323 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 2324 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
| 2325 | to_locked.vm->mailbox.state = MAILBOX_STATE_READ; |
J-Alves | c7484f1 | 2022-05-13 12:41:14 +0100 | [diff] [blame] | 2326 | share_state->retrieved_fragment_count[receiver_index]++; |
| 2327 | if (share_state->retrieved_fragment_count[receiver_index] == |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2328 | share_state->fragment_count) { |
| 2329 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2330 | page_pool); |
| 2331 | } |
| 2332 | |
| 2333 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 2334 | .arg1 = (uint32_t)handle, |
| 2335 | .arg2 = (uint32_t)(handle >> 32), |
| 2336 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2337 | |
| 2338 | out: |
| 2339 | share_states_unlock(&share_states); |
| 2340 | dump_share_states(); |
| 2341 | return ret; |
| 2342 | } |
| 2343 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2344 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2345 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2346 | struct ffa_mem_relinquish *relinquish_request, struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2347 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2348 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2349 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2350 | struct ffa_memory_share_state *share_state; |
| 2351 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2352 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2353 | struct ffa_value ret; |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2354 | uint32_t receiver_index; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2355 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2356 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2357 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2358 | "Stream endpoints not supported (got %d " |
| 2359 | "endpoints on " |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2360 | "FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2361 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2362 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2363 | } |
| 2364 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2365 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2366 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2367 | "VM ID %d in relinquish message doesn't match " |
| 2368 | "calling " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2369 | "VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2370 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2371 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2372 | } |
| 2373 | |
| 2374 | dump_share_states(); |
| 2375 | |
| 2376 | share_states = share_states_lock(); |
| 2377 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2378 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2379 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2380 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2381 | goto out; |
| 2382 | } |
| 2383 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2384 | if (!share_state->sending_complete) { |
| 2385 | dlog_verbose( |
| 2386 | "Memory with handle %#x not fully sent, can't " |
| 2387 | "relinquish.\n", |
| 2388 | handle); |
| 2389 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2390 | goto out; |
| 2391 | } |
| 2392 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2393 | memory_region = share_state->memory_region; |
| 2394 | CHECK(memory_region != NULL); |
| 2395 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2396 | receiver_index = ffa_memory_region_get_receiver(memory_region, |
| 2397 | from_locked.vm->id); |
| 2398 | |
| 2399 | if (receiver_index == memory_region->receiver_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2400 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2401 | "VM ID %d tried to relinquish memory region " |
| 2402 | "with " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2403 | "handle %#x and it is not a valid borrower.\n", |
| 2404 | from_locked.vm->id, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2405 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2406 | goto out; |
| 2407 | } |
| 2408 | |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2409 | if (share_state->retrieved_fragment_count[receiver_index] != |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2410 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2411 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2412 | "Memory with handle %#x not yet fully " |
| 2413 | "retrieved, " |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2414 | "receiver %x can't relinquish.\n", |
| 2415 | handle, from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2416 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2417 | goto out; |
| 2418 | } |
| 2419 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2420 | clear = relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2421 | |
| 2422 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2423 | * Clear is not allowed for memory that was shared, as the |
| 2424 | * original sender still has access to the memory. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2425 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2426 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2427 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2428 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2429 | goto out; |
| 2430 | } |
| 2431 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2432 | ret = ffa_relinquish_check_update( |
| 2433 | from_locked, share_state->fragments, |
| 2434 | share_state->fragment_constituent_counts, |
| 2435 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2436 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2437 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2438 | /* |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2439 | * Mark memory handle as not retrieved, so it can be |
| 2440 | * reclaimed (or retrieved again). |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2441 | */ |
J-Alves | 8eb1916 | 2022-04-28 10:56:48 +0100 | [diff] [blame] | 2442 | share_state->retrieved_fragment_count[receiver_index] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2443 | } |
| 2444 | |
| 2445 | out: |
| 2446 | share_states_unlock(&share_states); |
| 2447 | dump_share_states(); |
| 2448 | return ret; |
| 2449 | } |
| 2450 | |
| 2451 | /** |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2452 | * Validates that the reclaim transition is allowed for the given |
| 2453 | * handle, updates the page table of the reclaiming VM, and frees the |
| 2454 | * internal state associated with the handle. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2455 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2456 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2457 | ffa_memory_handle_t handle, |
| 2458 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2459 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2460 | { |
| 2461 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2462 | struct ffa_memory_share_state *share_state; |
| 2463 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2464 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2465 | |
| 2466 | dump_share_states(); |
| 2467 | |
| 2468 | share_states = share_states_lock(); |
J-Alves | b5084cf | 2022-07-06 14:20:12 +0100 | [diff] [blame] | 2469 | if (get_share_state(share_states, handle, &share_state)) { |
| 2470 | memory_region = share_state->memory_region; |
| 2471 | } else { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2472 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2473 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2474 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2475 | goto out; |
| 2476 | } |
| 2477 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2478 | CHECK(memory_region != NULL); |
| 2479 | |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2480 | if (vm_id_is_current_world(to_locked.vm->id) && |
| 2481 | to_locked.vm->id != memory_region->sender) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2482 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 2483 | "VM %#x attempted to reclaim memory handle %#x " |
| 2484 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2485 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2486 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2487 | goto out; |
| 2488 | } |
| 2489 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2490 | if (!share_state->sending_complete) { |
| 2491 | dlog_verbose( |
| 2492 | "Memory with handle %#x not fully sent, can't " |
| 2493 | "reclaim.\n", |
| 2494 | handle); |
| 2495 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2496 | goto out; |
| 2497 | } |
| 2498 | |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2499 | for (uint32_t i = 0; i < memory_region->receiver_count; i++) { |
| 2500 | if (share_state->retrieved_fragment_count[i] != 0) { |
| 2501 | dlog_verbose( |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2502 | "Tried to reclaim memory handle %#x " |
| 2503 | "that has " |
| 2504 | "not been relinquished by all " |
| 2505 | "borrowers(%x).\n", |
J-Alves | 752236c | 2022-04-28 11:07:47 +0100 | [diff] [blame] | 2506 | handle, |
| 2507 | memory_region->receivers[i] |
| 2508 | .receiver_permissions.receiver); |
| 2509 | ret = ffa_error(FFA_DENIED); |
| 2510 | goto out; |
| 2511 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2512 | } |
| 2513 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2514 | ret = ffa_retrieve_check_update( |
J-Alves | 7db3200 | 2021-12-14 14:44:50 +0000 | [diff] [blame] | 2515 | to_locked, memory_region->sender, share_state->fragments, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2516 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2517 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2518 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2519 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2520 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2521 | share_state_free(share_states, share_state, page_pool); |
J-Alves | a9cd7e3 | 2022-07-01 13:49:33 +0100 | [diff] [blame] | 2522 | dlog_verbose( |
| 2523 | "Freed share state after successful " |
| 2524 | "reclaim.\n"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2525 | } |
| 2526 | |
| 2527 | out: |
| 2528 | share_states_unlock(&share_states); |
| 2529 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2530 | } |