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 | |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 11 | #include "hf/arch/other_world.h" |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 12 | #include "hf/arch/plat/ffa.h" |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 13 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 14 | #include "hf/api.h" |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 15 | #include "hf/assert.h" |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 16 | #include "hf/check.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 17 | #include "hf/dlog.h" |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 18 | #include "hf/ffa_internal.h" |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 19 | #include "hf/mpool.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 20 | #include "hf/std.h" |
Andrew Scull | 3c25745 | 2019-11-26 13:32:50 +0000 | [diff] [blame] | 21 | #include "hf/vm.h" |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 22 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 23 | /** The maximum number of recipients a memory region may be sent to. */ |
| 24 | #define MAX_MEM_SHARE_RECIPIENTS 1 |
| 25 | |
| 26 | /** |
| 27 | * The maximum number of memory sharing handles which may be active at once. A |
| 28 | * DONATE handle is active from when it is sent to when it is retrieved; a SHARE |
| 29 | * or LEND handle is active from when it is sent to when it is reclaimed. |
| 30 | */ |
| 31 | #define MAX_MEM_SHARES 100 |
| 32 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 33 | /** |
| 34 | * The maximum number of fragments into which a memory sharing message may be |
| 35 | * broken. |
| 36 | */ |
| 37 | #define MAX_FRAGMENTS 20 |
| 38 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 39 | static_assert(sizeof(struct ffa_memory_region_constituent) % 16 == 0, |
| 40 | "struct ffa_memory_region_constituent must be a multiple of 16 " |
Andrew Walbran | c34c7b2 | 2020-02-28 11:16:59 +0000 | [diff] [blame] | 41 | "bytes long."); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 42 | static_assert(sizeof(struct ffa_composite_memory_region) % 16 == 0, |
| 43 | "struct ffa_composite_memory_region must be a multiple of 16 " |
Andrew Walbran | c34c7b2 | 2020-02-28 11:16:59 +0000 | [diff] [blame] | 44 | "bytes long."); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 45 | static_assert(sizeof(struct ffa_memory_region_attributes) == 4, |
Andrew Walbran | 41890ff | 2020-09-23 15:09:39 +0100 | [diff] [blame] | 46 | "struct ffa_memory_region_attributes must be 4 bytes long."); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 47 | static_assert(sizeof(struct ffa_memory_access) % 16 == 0, |
| 48 | "struct ffa_memory_access must be a multiple of 16 bytes long."); |
| 49 | static_assert(sizeof(struct ffa_memory_region) % 16 == 0, |
| 50 | "struct ffa_memory_region must be a multiple of 16 bytes long."); |
| 51 | static_assert(sizeof(struct ffa_mem_relinquish) % 16 == 0, |
| 52 | "struct ffa_mem_relinquish must be a multiple of 16 " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 53 | "bytes long."); |
Andrew Walbran | c34c7b2 | 2020-02-28 11:16:59 +0000 | [diff] [blame] | 54 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 55 | struct ffa_memory_share_state { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 56 | /** |
| 57 | * The memory region being shared, or NULL if this share state is |
| 58 | * unallocated. |
| 59 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 60 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 61 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 62 | struct ffa_memory_region_constituent *fragments[MAX_FRAGMENTS]; |
| 63 | |
| 64 | /** The number of constituents in each fragment. */ |
| 65 | uint32_t fragment_constituent_counts[MAX_FRAGMENTS]; |
| 66 | |
| 67 | /** |
| 68 | * The number of valid elements in the `fragments` and |
| 69 | * `fragment_constituent_counts` arrays. |
| 70 | */ |
| 71 | uint32_t fragment_count; |
| 72 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 73 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 74 | * The FF-A function used for sharing the memory. Must be one of |
| 75 | * FFA_MEM_DONATE_32, FFA_MEM_LEND_32 or FFA_MEM_SHARE_32 if the |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 76 | * share state is allocated, or 0. |
| 77 | */ |
| 78 | uint32_t share_func; |
| 79 | |
| 80 | /** |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 81 | * The sender's original mode before invoking the FF-A function for |
| 82 | * sharing the memory. |
| 83 | * This is used to reset the original configuration when sender invokes |
| 84 | * FFA_MEM_RECLAIM_32. |
| 85 | */ |
| 86 | uint32_t sender_orig_mode; |
| 87 | |
| 88 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 89 | * True if all the fragments of this sharing request have been sent and |
| 90 | * Hafnium has updated the sender page table accordingly. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 91 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 92 | bool sending_complete; |
| 93 | |
| 94 | /** |
| 95 | * How many fragments of the memory region each recipient has retrieved |
| 96 | * so far. The order of this array matches the order of the endpoint |
| 97 | * memory access descriptors in the memory region descriptor. Any |
| 98 | * entries beyond the receiver_count will always be 0. |
| 99 | */ |
| 100 | uint32_t retrieved_fragment_count[MAX_MEM_SHARE_RECIPIENTS]; |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 101 | }; |
| 102 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 103 | /** |
| 104 | * Encapsulates the set of share states while the `share_states_lock` is held. |
| 105 | */ |
| 106 | struct share_states_locked { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 107 | struct ffa_memory_share_state *share_states; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | /** |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 111 | * 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] | 112 | * by this lock. |
| 113 | */ |
| 114 | static struct spinlock share_states_lock_instance = SPINLOCK_INIT; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 115 | static struct ffa_memory_share_state share_states[MAX_MEM_SHARES]; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 116 | |
| 117 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 118 | * Buffer for retrieving memory region information from the TEE for when a |
| 119 | * region is reclaimed by a VM. Access to this buffer must be guarded by the VM |
| 120 | * lock of the TEE VM. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 121 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 122 | alignas(PAGE_SIZE) static uint8_t |
| 123 | tee_retrieve_buffer[HF_MAILBOX_SIZE * MAX_FRAGMENTS]; |
| 124 | |
| 125 | /** |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 126 | * Extracts the index from a memory handle allocated by Hafnium's current world. |
| 127 | */ |
| 128 | uint64_t ffa_memory_handle_get_index(ffa_memory_handle_t handle) |
| 129 | { |
| 130 | return handle & ~FFA_MEMORY_HANDLE_ALLOCATOR_MASK; |
| 131 | } |
| 132 | |
| 133 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 134 | * Initialises the next available `struct ffa_memory_share_state` and sets |
| 135 | * `share_state_ret` to a pointer to it. If `handle` is |
| 136 | * `FFA_MEMORY_HANDLE_INVALID` then allocates an appropriate handle, otherwise |
| 137 | * uses the provided handle which is assumed to be globally unique. |
| 138 | * |
| 139 | * Returns true on success or false if none are available. |
| 140 | */ |
| 141 | static bool allocate_share_state( |
| 142 | struct share_states_locked share_states, uint32_t share_func, |
| 143 | struct ffa_memory_region *memory_region, uint32_t fragment_length, |
| 144 | ffa_memory_handle_t handle, |
| 145 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 146 | { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 147 | uint64_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 148 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 149 | assert(share_states.share_states != NULL); |
| 150 | assert(memory_region != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 151 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 152 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 153 | if (share_states.share_states[i].share_func == 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 154 | uint32_t j; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 155 | struct ffa_memory_share_state *allocated_state = |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 156 | &share_states.share_states[i]; |
| 157 | struct ffa_composite_memory_region *composite = |
| 158 | ffa_memory_region_get_composite(memory_region, |
| 159 | 0); |
| 160 | |
| 161 | if (handle == FFA_MEMORY_HANDLE_INVALID) { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 162 | memory_region->handle = |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 163 | plat_ffa_memory_handle_make(i); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 164 | } else { |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 165 | memory_region->handle = handle; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 166 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 167 | allocated_state->share_func = share_func; |
| 168 | allocated_state->memory_region = memory_region; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 169 | allocated_state->fragment_count = 1; |
| 170 | allocated_state->fragments[0] = composite->constituents; |
| 171 | allocated_state->fragment_constituent_counts[0] = |
| 172 | (fragment_length - |
| 173 | ffa_composite_constituent_offset(memory_region, |
| 174 | 0)) / |
| 175 | sizeof(struct ffa_memory_region_constituent); |
| 176 | allocated_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 177 | for (j = 0; j < MAX_MEM_SHARE_RECIPIENTS; ++j) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 178 | allocated_state->retrieved_fragment_count[j] = |
| 179 | 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 180 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 181 | if (share_state_ret != NULL) { |
| 182 | *share_state_ret = allocated_state; |
| 183 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 184 | return true; |
| 185 | } |
| 186 | } |
| 187 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 188 | return false; |
| 189 | } |
| 190 | |
| 191 | /** Locks the share states lock. */ |
| 192 | struct share_states_locked share_states_lock(void) |
| 193 | { |
| 194 | sl_lock(&share_states_lock_instance); |
| 195 | |
| 196 | return (struct share_states_locked){.share_states = share_states}; |
| 197 | } |
| 198 | |
| 199 | /** Unlocks the share states lock. */ |
| 200 | static void share_states_unlock(struct share_states_locked *share_states) |
| 201 | { |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 202 | assert(share_states->share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 203 | share_states->share_states = NULL; |
| 204 | sl_unlock(&share_states_lock_instance); |
| 205 | } |
| 206 | |
| 207 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 208 | * If the given handle is a valid handle for an allocated share state then |
| 209 | * initialises `share_state_ret` to point to the share state and returns true. |
| 210 | * Otherwise returns false. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 211 | */ |
| 212 | static bool get_share_state(struct share_states_locked share_states, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 213 | ffa_memory_handle_t handle, |
| 214 | struct ffa_memory_share_state **share_state_ret) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 215 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 216 | struct ffa_memory_share_state *share_state; |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 217 | uint64_t index; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 218 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 219 | assert(share_states.share_states != NULL); |
| 220 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 221 | |
| 222 | /* |
| 223 | * First look for a share_state allocated by us, in which case the |
| 224 | * handle is based on the index. |
| 225 | */ |
Olivier Deprez | 55a189e | 2021-06-09 15:45:27 +0200 | [diff] [blame] | 226 | if (plat_ffa_memory_handle_allocated_by_current_world(handle)) { |
J-Alves | 917d2f2 | 2020-10-30 18:39:30 +0000 | [diff] [blame] | 227 | index = ffa_memory_handle_get_index(handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 228 | if (index < MAX_MEM_SHARES) { |
| 229 | share_state = &share_states.share_states[index]; |
| 230 | if (share_state->share_func != 0) { |
| 231 | *share_state_ret = share_state; |
| 232 | return true; |
| 233 | } |
| 234 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 235 | } |
| 236 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 237 | /* Fall back to a linear scan. */ |
| 238 | for (index = 0; index < MAX_MEM_SHARES; ++index) { |
| 239 | share_state = &share_states.share_states[index]; |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 240 | if (share_state->memory_region != NULL && |
| 241 | share_state->memory_region->handle == handle && |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 242 | share_state->share_func != 0) { |
| 243 | *share_state_ret = share_state; |
| 244 | return true; |
| 245 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 246 | } |
| 247 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 248 | return false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | /** Marks a share state as unallocated. */ |
| 252 | static void share_state_free(struct share_states_locked share_states, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 253 | struct ffa_memory_share_state *share_state, |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 254 | struct mpool *page_pool) |
| 255 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 256 | uint32_t i; |
| 257 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 258 | assert(share_states.share_states != NULL); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 259 | share_state->share_func = 0; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 260 | share_state->sending_complete = false; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 261 | mpool_free(page_pool, share_state->memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 262 | /* |
| 263 | * First fragment is part of the same page as the `memory_region`, so it |
| 264 | * doesn't need to be freed separately. |
| 265 | */ |
| 266 | share_state->fragments[0] = NULL; |
| 267 | share_state->fragment_constituent_counts[0] = 0; |
| 268 | for (i = 1; i < share_state->fragment_count; ++i) { |
| 269 | mpool_free(page_pool, share_state->fragments[i]); |
| 270 | share_state->fragments[i] = NULL; |
| 271 | share_state->fragment_constituent_counts[i] = 0; |
| 272 | } |
| 273 | share_state->fragment_count = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 274 | share_state->memory_region = NULL; |
| 275 | } |
| 276 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 277 | /** Checks whether the given share state has been fully sent. */ |
| 278 | static bool share_state_sending_complete( |
| 279 | struct share_states_locked share_states, |
| 280 | struct ffa_memory_share_state *share_state) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 281 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 282 | struct ffa_composite_memory_region *composite; |
| 283 | uint32_t expected_constituent_count; |
| 284 | uint32_t fragment_constituent_count_total = 0; |
| 285 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 286 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 287 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 288 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 289 | |
| 290 | /* |
| 291 | * Share state must already be valid, or it's not possible to get hold |
| 292 | * of it. |
| 293 | */ |
| 294 | CHECK(share_state->memory_region != NULL && |
| 295 | share_state->share_func != 0); |
| 296 | |
| 297 | composite = |
| 298 | ffa_memory_region_get_composite(share_state->memory_region, 0); |
| 299 | expected_constituent_count = composite->constituent_count; |
| 300 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 301 | fragment_constituent_count_total += |
| 302 | share_state->fragment_constituent_counts[i]; |
| 303 | } |
| 304 | dlog_verbose( |
| 305 | "Checking completion: constituent count %d/%d from %d " |
| 306 | "fragments.\n", |
| 307 | fragment_constituent_count_total, expected_constituent_count, |
| 308 | share_state->fragment_count); |
| 309 | |
| 310 | return fragment_constituent_count_total == expected_constituent_count; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Calculates the offset of the next fragment expected for the given share |
| 315 | * state. |
| 316 | */ |
| 317 | static uint32_t share_state_next_fragment_offset( |
| 318 | struct share_states_locked share_states, |
| 319 | struct ffa_memory_share_state *share_state) |
| 320 | { |
| 321 | uint32_t next_fragment_offset; |
| 322 | uint32_t i; |
| 323 | |
| 324 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 325 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 326 | |
| 327 | next_fragment_offset = |
| 328 | ffa_composite_constituent_offset(share_state->memory_region, 0); |
| 329 | for (i = 0; i < share_state->fragment_count; ++i) { |
| 330 | next_fragment_offset += |
| 331 | share_state->fragment_constituent_counts[i] * |
| 332 | sizeof(struct ffa_memory_region_constituent); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 333 | } |
| 334 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 335 | return next_fragment_offset; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 336 | } |
| 337 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 338 | static void dump_memory_region(struct ffa_memory_region *memory_region) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 339 | { |
| 340 | uint32_t i; |
| 341 | |
| 342 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 343 | return; |
| 344 | } |
| 345 | |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 346 | dlog("from VM %#x, attributes %#x, flags %#x, tag %u, to " |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 347 | "%u " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 348 | "recipients [", |
| 349 | memory_region->sender, memory_region->attributes, |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 350 | memory_region->flags, memory_region->tag, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 351 | memory_region->receiver_count); |
| 352 | for (i = 0; i < memory_region->receiver_count; ++i) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 353 | if (i != 0) { |
| 354 | dlog(", "); |
| 355 | } |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 356 | dlog("VM %#x: %#x (offset %u)", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 357 | memory_region->receivers[i].receiver_permissions.receiver, |
| 358 | memory_region->receivers[i] |
| 359 | .receiver_permissions.permissions, |
| 360 | memory_region->receivers[i] |
| 361 | .composite_memory_region_offset); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 362 | } |
| 363 | dlog("]"); |
| 364 | } |
| 365 | |
| 366 | static void dump_share_states(void) |
| 367 | { |
| 368 | uint32_t i; |
| 369 | |
| 370 | if (LOG_LEVEL < LOG_LEVEL_VERBOSE) { |
| 371 | return; |
| 372 | } |
| 373 | |
| 374 | dlog("Current share states:\n"); |
| 375 | sl_lock(&share_states_lock_instance); |
| 376 | for (i = 0; i < MAX_MEM_SHARES; ++i) { |
| 377 | if (share_states[i].share_func != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 378 | switch (share_states[i].share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 379 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 380 | dlog("SHARE"); |
| 381 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 382 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 383 | dlog("LEND"); |
| 384 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 385 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 386 | dlog("DONATE"); |
| 387 | break; |
| 388 | default: |
| 389 | dlog("invalid share_func %#x", |
| 390 | share_states[i].share_func); |
| 391 | } |
Olivier Deprez | 935e1b1 | 2020-12-22 18:01:29 +0100 | [diff] [blame] | 392 | dlog(" %#x (", share_states[i].memory_region->handle); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 393 | dump_memory_region(share_states[i].memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 394 | if (share_states[i].sending_complete) { |
| 395 | dlog("): fully sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 396 | } else { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 397 | dlog("): partially sent"); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 398 | } |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 399 | dlog(" with %d fragments, %d retrieved, " |
| 400 | " sender's original mode: %#x\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 401 | share_states[i].fragment_count, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 402 | share_states[i].retrieved_fragment_count[0], |
| 403 | share_states[i].sender_orig_mode); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 404 | } |
| 405 | } |
| 406 | sl_unlock(&share_states_lock_instance); |
| 407 | } |
| 408 | |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 409 | /* TODO: Add device attributes: GRE, cacheability, shareability. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 410 | static inline uint32_t ffa_memory_permissions_to_mode( |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 411 | ffa_memory_access_permissions_t permissions, uint32_t default_mode) |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 412 | { |
| 413 | uint32_t mode = 0; |
| 414 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 415 | switch (ffa_get_data_access_attr(permissions)) { |
| 416 | case FFA_DATA_ACCESS_RO: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 417 | mode = MM_MODE_R; |
| 418 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 419 | case FFA_DATA_ACCESS_RW: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 420 | mode = MM_MODE_R | MM_MODE_W; |
| 421 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 422 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 423 | mode = (default_mode & (MM_MODE_R | MM_MODE_W)); |
| 424 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 425 | case FFA_DATA_ACCESS_RESERVED: |
| 426 | panic("Tried to convert FFA_DATA_ACCESS_RESERVED."); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 427 | } |
| 428 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 429 | switch (ffa_get_instruction_access_attr(permissions)) { |
| 430 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 431 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 432 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 433 | mode |= MM_MODE_X; |
| 434 | break; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 435 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 436 | mode |= (default_mode & MM_MODE_X); |
| 437 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 438 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 439 | panic("Tried to convert FFA_INSTRUCTION_ACCESS_RESVERVED."); |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | return mode; |
| 443 | } |
| 444 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 445 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 446 | * Get the current mode in the stage-2 page table of the given vm of all the |
| 447 | * 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] | 448 | * an appropriate FF-A error if not. |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 449 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 450 | static struct ffa_value constituents_get_mode( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 451 | struct vm_locked vm, uint32_t *orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 452 | struct ffa_memory_region_constituent **fragments, |
| 453 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count) |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 454 | { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 455 | uint32_t i; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 456 | uint32_t j; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 457 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 458 | if (fragment_count == 0 || fragment_constituent_counts[0] == 0) { |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 459 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 460 | * Fail if there are no constituents. Otherwise we would get an |
| 461 | * uninitialised *orig_mode. |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 462 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 463 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 464 | } |
| 465 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 466 | for (i = 0; i < fragment_count; ++i) { |
| 467 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 468 | ipaddr_t begin = ipa_init(fragments[i][j].address); |
| 469 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 470 | ipaddr_t end = ipa_add(begin, size); |
| 471 | uint32_t current_mode; |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 472 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 473 | /* Fail if addresses are not page-aligned. */ |
| 474 | if (!is_aligned(ipa_addr(begin), PAGE_SIZE) || |
| 475 | !is_aligned(ipa_addr(end), PAGE_SIZE)) { |
| 476 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 477 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 478 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 479 | /* |
| 480 | * Ensure that this constituent memory range is all |
| 481 | * mapped with the same mode. |
| 482 | */ |
Raghu Krishnamurthy | 785d52f | 2021-02-13 00:02:40 -0800 | [diff] [blame] | 483 | if (!vm_mem_get_mode(vm, begin, end, ¤t_mode)) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 484 | return ffa_error(FFA_DENIED); |
| 485 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 486 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 487 | /* |
| 488 | * Ensure that all constituents are mapped with the same |
| 489 | * mode. |
| 490 | */ |
| 491 | if (i == 0) { |
| 492 | *orig_mode = current_mode; |
| 493 | } else if (current_mode != *orig_mode) { |
| 494 | dlog_verbose( |
| 495 | "Expected mode %#x but was %#x for %d " |
| 496 | "pages at %#x.\n", |
| 497 | *orig_mode, current_mode, |
| 498 | fragments[i][j].page_count, |
| 499 | ipa_addr(begin)); |
| 500 | return ffa_error(FFA_DENIED); |
| 501 | } |
Jose Marinho | 7fbbf2e | 2019-08-05 13:19:58 +0100 | [diff] [blame] | 502 | } |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 503 | } |
| 504 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 505 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | /** |
| 509 | * Verify that all pages have the same mode, that the starting mode |
| 510 | * constitutes a valid state and obtain the next mode to apply |
| 511 | * to the sending VM. |
| 512 | * |
| 513 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 514 | * 1) FFA_DENIED if a state transition was not found; |
| 515 | * 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] | 516 | * the <from> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 517 | * 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] | 518 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 519 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 520 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 521 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 522 | static struct ffa_value ffa_send_check_transition( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 523 | struct vm_locked from, uint32_t share_func, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 524 | ffa_memory_access_permissions_t permissions, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 525 | struct ffa_memory_region_constituent **fragments, |
| 526 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 527 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 528 | { |
| 529 | const uint32_t state_mask = |
| 530 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 531 | uint32_t required_from_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 532 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 533 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 534 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 535 | fragment_constituent_counts, |
| 536 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 537 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 538 | dlog_verbose("Inconsistent modes.\n", fragment_count); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 539 | return ret; |
Andrew Scull | b5f49e0 | 2019-10-02 13:20:47 +0100 | [diff] [blame] | 540 | } |
| 541 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 542 | /* Ensure the address range is normal memory and not a device. */ |
| 543 | if (*orig_from_mode & MM_MODE_D) { |
| 544 | dlog_verbose("Can't share device memory (mode is %#x).\n", |
| 545 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 546 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | /* |
| 550 | * Ensure the sender is the owner and has exclusive access to the |
| 551 | * memory. |
| 552 | */ |
| 553 | if ((*orig_from_mode & state_mask) != 0) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 554 | return ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 555 | } |
| 556 | |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 557 | required_from_mode = |
| 558 | ffa_memory_permissions_to_mode(permissions, *orig_from_mode); |
| 559 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 560 | if ((*orig_from_mode & required_from_mode) != required_from_mode) { |
| 561 | dlog_verbose( |
| 562 | "Sender tried to send memory with permissions which " |
| 563 | "required mode %#x but only had %#x itself.\n", |
| 564 | required_from_mode, *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 565 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | /* Find the appropriate new mode. */ |
| 569 | *from_mode = ~state_mask & *orig_from_mode; |
Andrew Walbran | e7ad3c0 | 2019-12-24 17:03:04 +0000 | [diff] [blame] | 570 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 571 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 572 | *from_mode |= MM_MODE_INVALID | MM_MODE_UNOWNED; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 573 | break; |
| 574 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 575 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 576 | *from_mode |= MM_MODE_INVALID; |
Andrew Walbran | 648fc3e | 2019-10-22 16:23:05 +0100 | [diff] [blame] | 577 | break; |
| 578 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 579 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 580 | *from_mode |= MM_MODE_SHARED; |
Jose Marinho | 56c2573 | 2019-05-20 09:48:53 +0100 | [diff] [blame] | 581 | break; |
| 582 | |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 583 | default: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 584 | return ffa_error(FFA_INVALID_PARAMETERS); |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 585 | } |
| 586 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 587 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 588 | } |
| 589 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 590 | static struct ffa_value ffa_relinquish_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 591 | struct vm_locked from, uint32_t *orig_from_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 592 | struct ffa_memory_region_constituent **fragments, |
| 593 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 594 | uint32_t *from_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 595 | { |
| 596 | const uint32_t state_mask = |
| 597 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 598 | uint32_t orig_from_state; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 599 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 600 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 601 | ret = constituents_get_mode(from, orig_from_mode, fragments, |
| 602 | fragment_constituent_counts, |
| 603 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 604 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 605 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | /* Ensure the address range is normal memory and not a device. */ |
| 609 | if (*orig_from_mode & MM_MODE_D) { |
| 610 | dlog_verbose("Can't relinquish device memory (mode is %#x).\n", |
| 611 | *orig_from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 612 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | /* |
| 616 | * Ensure the relinquishing VM is not the owner but has access to the |
| 617 | * memory. |
| 618 | */ |
| 619 | orig_from_state = *orig_from_mode & state_mask; |
| 620 | if ((orig_from_state & ~MM_MODE_SHARED) != MM_MODE_UNOWNED) { |
| 621 | dlog_verbose( |
| 622 | "Tried to relinquish memory in state %#x (masked %#x " |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 623 | "but should be %#x).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 624 | *orig_from_mode, orig_from_state, MM_MODE_UNOWNED); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 625 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | /* Find the appropriate new mode. */ |
| 629 | *from_mode = (~state_mask & *orig_from_mode) | MM_MODE_UNMAPPED_MASK; |
| 630 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 631 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | /** |
| 635 | * Verify that all pages have the same mode, that the starting mode |
| 636 | * constitutes a valid state and obtain the next mode to apply |
| 637 | * to the retrieving VM. |
| 638 | * |
| 639 | * Returns: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 640 | * 1) FFA_DENIED if a state transition was not found; |
| 641 | * 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] | 642 | * the <to> VM; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 643 | * 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] | 644 | * aligned; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 645 | * 4) FFA_INVALID_PARAMETERS if the requested share type was not handled. |
| 646 | * Or FFA_SUCCESS on success. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 647 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 648 | static struct ffa_value ffa_retrieve_check_transition( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 649 | struct vm_locked to, uint32_t share_func, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 650 | struct ffa_memory_region_constituent **fragments, |
| 651 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 652 | uint32_t memory_to_attributes, uint32_t *to_mode) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 653 | { |
| 654 | uint32_t orig_to_mode; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 655 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 656 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 657 | ret = constituents_get_mode(to, &orig_to_mode, fragments, |
| 658 | fragment_constituent_counts, |
| 659 | fragment_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 660 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 661 | dlog_verbose("Inconsistent modes.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 662 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 663 | } |
| 664 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 665 | if (share_func == FFA_MEM_RECLAIM_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 666 | const uint32_t state_mask = |
| 667 | MM_MODE_INVALID | MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 668 | uint32_t orig_to_state = orig_to_mode & state_mask; |
| 669 | |
| 670 | if (orig_to_state != MM_MODE_INVALID && |
| 671 | orig_to_state != MM_MODE_SHARED) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 672 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 673 | } |
| 674 | } else { |
| 675 | /* |
| 676 | * Ensure the retriever has the expected state. We don't care |
| 677 | * about the MM_MODE_SHARED bit; either with or without it set |
| 678 | * are both valid representations of the !O-NA state. |
| 679 | */ |
| 680 | if ((orig_to_mode & MM_MODE_UNMAPPED_MASK) != |
| 681 | MM_MODE_UNMAPPED_MASK) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 682 | return ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 683 | } |
| 684 | } |
| 685 | |
| 686 | /* Find the appropriate new mode. */ |
| 687 | *to_mode = memory_to_attributes; |
| 688 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 689 | case FFA_MEM_DONATE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 690 | *to_mode |= 0; |
| 691 | break; |
| 692 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 693 | case FFA_MEM_LEND_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 694 | *to_mode |= MM_MODE_UNOWNED; |
| 695 | break; |
| 696 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 697 | case FFA_MEM_SHARE_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 698 | *to_mode |= MM_MODE_UNOWNED | MM_MODE_SHARED; |
| 699 | break; |
| 700 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 701 | case FFA_MEM_RECLAIM_32: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 702 | *to_mode |= 0; |
| 703 | break; |
| 704 | |
| 705 | default: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 706 | dlog_error("Invalid share_func %#x.\n", share_func); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 707 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 708 | } |
| 709 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 710 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 75509b4 | 2019-04-09 09:34:59 +0100 | [diff] [blame] | 711 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 712 | |
| 713 | /** |
| 714 | * Updates a VM's page table such that the given set of physical address ranges |
| 715 | * are mapped in the address space at the corresponding address ranges, in the |
| 716 | * mode provided. |
| 717 | * |
| 718 | * If commit is false, the page tables will be allocated from the mpool but no |
| 719 | * mappings will actually be updated. This function must always be called first |
| 720 | * with commit false to check that it will succeed before calling with commit |
| 721 | * true, to avoid leaving the page table in a half-updated state. To make a |
| 722 | * series of changes atomically you can call them all with commit false before |
| 723 | * calling them all with commit true. |
| 724 | * |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 725 | * vm_ptable_defrag should always be called after a series of page table |
| 726 | * updates, whether they succeed or fail. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 727 | * |
| 728 | * Returns true on success, or false if the update failed and no changes were |
| 729 | * made to memory mappings. |
| 730 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 731 | static bool ffa_region_group_identity_map( |
Andrew Walbran | f4b51af | 2020-02-03 14:44:54 +0000 | [diff] [blame] | 732 | struct vm_locked vm_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 733 | struct ffa_memory_region_constituent **fragments, |
| 734 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
Daniel Boulby | 4dd3f53 | 2021-09-21 09:57:08 +0100 | [diff] [blame] | 735 | uint32_t mode, struct mpool *ppool, bool commit) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 736 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 737 | uint32_t i; |
| 738 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 739 | |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 740 | if (vm_locked.vm->el0_partition) { |
| 741 | mode |= MM_MODE_USER | MM_MODE_NG; |
| 742 | } |
| 743 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 744 | /* Iterate over the memory region constituents within each fragment. */ |
| 745 | for (i = 0; i < fragment_count; ++i) { |
| 746 | for (j = 0; j < fragment_constituent_counts[i]; ++j) { |
| 747 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 748 | paddr_t pa_begin = |
| 749 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 750 | paddr_t pa_end = pa_add(pa_begin, size); |
| 751 | |
| 752 | if (commit) { |
| 753 | vm_identity_commit(vm_locked, pa_begin, pa_end, |
| 754 | mode, ppool, NULL); |
| 755 | } else if (!vm_identity_prepare(vm_locked, pa_begin, |
| 756 | pa_end, mode, ppool)) { |
| 757 | return false; |
| 758 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 759 | } |
| 760 | } |
| 761 | |
| 762 | return true; |
| 763 | } |
| 764 | |
| 765 | /** |
| 766 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 767 | * flushed from the cache so the memory has been cleared across the system. |
| 768 | */ |
| 769 | static bool clear_memory(paddr_t begin, paddr_t end, struct mpool *ppool) |
| 770 | { |
| 771 | /* |
Fuad Tabba | ed294af | 2019-12-20 10:43:01 +0000 | [diff] [blame] | 772 | * 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] | 773 | * global mapping of the whole range. Such an approach will limit |
| 774 | * the changes to stage-1 tables and will allow only local |
| 775 | * invalidation. |
| 776 | */ |
| 777 | bool ret; |
| 778 | struct mm_stage1_locked stage1_locked = mm_lock_stage1(); |
| 779 | void *ptr = |
| 780 | mm_identity_map(stage1_locked, begin, end, MM_MODE_W, ppool); |
| 781 | size_t size = pa_difference(begin, end); |
| 782 | |
| 783 | if (!ptr) { |
| 784 | /* TODO: partial defrag of failed range. */ |
| 785 | /* Recover any memory consumed in failed mapping. */ |
| 786 | mm_defrag(stage1_locked, ppool); |
| 787 | goto fail; |
| 788 | } |
| 789 | |
| 790 | memset_s(ptr, size, 0, size); |
| 791 | arch_mm_flush_dcache(ptr, size); |
| 792 | mm_unmap(stage1_locked, begin, end, ppool); |
| 793 | |
| 794 | ret = true; |
| 795 | goto out; |
| 796 | |
| 797 | fail: |
| 798 | ret = false; |
| 799 | |
| 800 | out: |
| 801 | mm_unlock_stage1(&stage1_locked); |
| 802 | |
| 803 | return ret; |
| 804 | } |
| 805 | |
| 806 | /** |
| 807 | * Clears a region of physical memory by overwriting it with zeros. The data is |
| 808 | * flushed from the cache so the memory has been cleared across the system. |
| 809 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 810 | static bool ffa_clear_memory_constituents( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 811 | struct ffa_memory_region_constituent **fragments, |
| 812 | const uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 813 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 814 | { |
| 815 | struct mpool local_page_pool; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 816 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 817 | struct mm_stage1_locked stage1_locked; |
| 818 | bool ret = false; |
| 819 | |
| 820 | /* |
| 821 | * Create a local pool so any freed memory can't be used by another |
| 822 | * thread. This is to ensure each constituent that is mapped can be |
| 823 | * unmapped again afterwards. |
| 824 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 825 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 826 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 827 | /* Iterate over the memory region constituents within each fragment. */ |
| 828 | for (i = 0; i < fragment_count; ++i) { |
| 829 | uint32_t j; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 830 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 831 | for (j = 0; j < fragment_constituent_counts[j]; ++j) { |
| 832 | size_t size = fragments[i][j].page_count * PAGE_SIZE; |
| 833 | paddr_t begin = |
| 834 | pa_from_ipa(ipa_init(fragments[i][j].address)); |
| 835 | paddr_t end = pa_add(begin, size); |
| 836 | |
| 837 | if (!clear_memory(begin, end, &local_page_pool)) { |
| 838 | /* |
| 839 | * api_clear_memory will defrag on failure, so |
| 840 | * no need to do it here. |
| 841 | */ |
| 842 | goto out; |
| 843 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 844 | } |
| 845 | } |
| 846 | |
| 847 | /* |
| 848 | * Need to defrag after clearing, as it may have added extra mappings to |
| 849 | * the stage 1 page table. |
| 850 | */ |
| 851 | stage1_locked = mm_lock_stage1(); |
| 852 | mm_defrag(stage1_locked, &local_page_pool); |
| 853 | mm_unlock_stage1(&stage1_locked); |
| 854 | |
| 855 | ret = true; |
| 856 | |
| 857 | out: |
| 858 | mpool_fini(&local_page_pool); |
| 859 | return ret; |
| 860 | } |
| 861 | |
| 862 | /** |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 863 | * 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] | 864 | * |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 865 | * This function requires the calling context to hold the <from> VM lock. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 866 | * |
| 867 | * Returns: |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 868 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 869 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 870 | * erroneous; |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 871 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete the |
| 872 | * request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 873 | * 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] | 874 | * memory with the given permissions. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 875 | * Success is indicated by FFA_SUCCESS. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 876 | */ |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 877 | static struct ffa_value ffa_send_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 878 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 879 | struct ffa_memory_region_constituent **fragments, |
| 880 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 881 | uint32_t share_func, ffa_memory_access_permissions_t permissions, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 882 | struct mpool *page_pool, bool clear, uint32_t *orig_from_mode_ret) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 883 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 884 | uint32_t i; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 885 | uint32_t orig_from_mode; |
| 886 | uint32_t from_mode; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 887 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 888 | struct ffa_value ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 889 | |
| 890 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 891 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 892 | * not we would get alignment faults trying to read (64-bit) values. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 893 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 894 | for (i = 0; i < fragment_count; ++i) { |
| 895 | if (!is_aligned(fragments[i], 8)) { |
| 896 | dlog_verbose("Constituents not aligned.\n"); |
| 897 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 898 | } |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 902 | * Check if the state transition is lawful for the sender, ensure that |
| 903 | * all constituents of a memory region being shared are at the same |
| 904 | * state. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 905 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 906 | ret = ffa_send_check_transition(from_locked, share_func, permissions, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 907 | &orig_from_mode, fragments, |
| 908 | fragment_constituent_counts, |
| 909 | fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 910 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 911 | dlog_verbose("Invalid transition for send.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 912 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 913 | } |
| 914 | |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 915 | if (orig_from_mode_ret != NULL) { |
| 916 | *orig_from_mode_ret = orig_from_mode; |
| 917 | } |
| 918 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 919 | /* |
| 920 | * Create a local pool so any freed memory can't be used by another |
| 921 | * thread. This is to ensure the original mapping can be restored if the |
| 922 | * clear fails. |
| 923 | */ |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 924 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 925 | |
| 926 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 927 | * First reserve all required memory for the new page table entries |
| 928 | * without committing, to make sure the entire operation will succeed |
| 929 | * without exhausting the page pool. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 930 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 931 | if (!ffa_region_group_identity_map( |
| 932 | from_locked, fragments, fragment_constituent_counts, |
| 933 | fragment_count, from_mode, page_pool, false)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 934 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 935 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 936 | goto out; |
| 937 | } |
| 938 | |
| 939 | /* |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 940 | * Update the mapping for the sender. This won't allocate because the |
| 941 | * transaction was already prepared above, but may free pages in the |
| 942 | * case that a whole block is being unmapped that was previously |
| 943 | * partially mapped. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 944 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 945 | CHECK(ffa_region_group_identity_map( |
| 946 | from_locked, fragments, fragment_constituent_counts, |
| 947 | fragment_count, from_mode, &local_page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 948 | |
| 949 | /* Clear the memory so no VM or device can see the previous contents. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 950 | if (clear && !ffa_clear_memory_constituents( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 951 | fragments, fragment_constituent_counts, |
| 952 | fragment_count, page_pool)) { |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 953 | /* |
| 954 | * On failure, roll back by returning memory to the sender. This |
| 955 | * may allocate pages which were previously freed into |
| 956 | * `local_page_pool` by the call above, but will never allocate |
| 957 | * more pages than that so can never fail. |
| 958 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 959 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 960 | from_locked, fragments, fragment_constituent_counts, |
| 961 | fragment_count, orig_from_mode, &local_page_pool, |
| 962 | true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 963 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 964 | ret = ffa_error(FFA_NO_MEMORY); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 965 | goto out; |
| 966 | } |
| 967 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 968 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 969 | |
| 970 | out: |
| 971 | mpool_fini(&local_page_pool); |
| 972 | |
| 973 | /* |
| 974 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 975 | * error) or merging entries into blocks where possible (on success). |
| 976 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 977 | vm_ptable_defrag(from_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 978 | |
| 979 | return ret; |
| 980 | } |
| 981 | |
| 982 | /** |
| 983 | * Validates and maps memory shared from one VM to another. |
| 984 | * |
| 985 | * This function requires the calling context to hold the <to> lock. |
| 986 | * |
| 987 | * Returns: |
| 988 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 989 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 990 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 991 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 992 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 993 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 994 | */ |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 995 | static struct ffa_value ffa_retrieve_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 996 | struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 997 | struct ffa_memory_region_constituent **fragments, |
| 998 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 999 | uint32_t memory_to_attributes, uint32_t share_func, bool clear, |
| 1000 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1001 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1002 | uint32_t i; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1003 | uint32_t to_mode; |
| 1004 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1005 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1006 | |
| 1007 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1008 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1009 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1010 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1011 | for (i = 0; i < fragment_count; ++i) { |
| 1012 | if (!is_aligned(fragments[i], 8)) { |
| 1013 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1014 | } |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | /* |
| 1018 | * Check if the state transition is lawful for the recipient, and ensure |
| 1019 | * that all constituents of the memory region being retrieved are at the |
| 1020 | * same state. |
| 1021 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1022 | ret = ffa_retrieve_check_transition( |
| 1023 | to_locked, share_func, fragments, fragment_constituent_counts, |
| 1024 | fragment_count, memory_to_attributes, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1025 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1026 | dlog_verbose("Invalid transition for retrieve.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1027 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1028 | } |
| 1029 | |
| 1030 | /* |
| 1031 | * Create a local pool so any freed memory can't be used by another |
| 1032 | * thread. This is to ensure the original mapping can be restored if the |
| 1033 | * clear fails. |
| 1034 | */ |
| 1035 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1036 | |
| 1037 | /* |
| 1038 | * First reserve all required memory for the new page table entries in |
| 1039 | * the recipient page tables without committing, to make sure the entire |
| 1040 | * operation will succeed without exhausting the page pool. |
| 1041 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1042 | if (!ffa_region_group_identity_map( |
| 1043 | to_locked, fragments, fragment_constituent_counts, |
| 1044 | fragment_count, to_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1045 | /* TODO: partial defrag of failed range. */ |
| 1046 | dlog_verbose( |
| 1047 | "Insufficient memory to update recipient page " |
| 1048 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1049 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1050 | goto out; |
| 1051 | } |
| 1052 | |
| 1053 | /* Clear the memory so no VM or device can see the previous contents. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1054 | if (clear && !ffa_clear_memory_constituents( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1055 | fragments, fragment_constituent_counts, |
| 1056 | fragment_count, page_pool)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1057 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1058 | goto out; |
| 1059 | } |
| 1060 | |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1061 | /* |
| 1062 | * Complete the transfer by mapping the memory into the recipient. This |
| 1063 | * won't allocate because the transaction was already prepared above, so |
| 1064 | * it doesn't need to use the `local_page_pool`. |
| 1065 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1066 | CHECK(ffa_region_group_identity_map( |
| 1067 | to_locked, fragments, fragment_constituent_counts, |
| 1068 | fragment_count, to_mode, page_pool, true)); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1069 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1070 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1071 | |
| 1072 | out: |
| 1073 | mpool_fini(&local_page_pool); |
| 1074 | |
| 1075 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1076 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1077 | * error) or merging entries into blocks where possible (on success). |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1078 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1079 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1080 | |
| 1081 | return ret; |
| 1082 | } |
| 1083 | |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1084 | /** |
| 1085 | * Reclaims the given memory from the TEE. To do this space is first reserved in |
| 1086 | * the <to> VM's page table, then the reclaim request is sent on to the TEE, |
| 1087 | * then (if that is successful) the memory is mapped back into the <to> VM's |
| 1088 | * page table. |
| 1089 | * |
| 1090 | * This function requires the calling context to hold the <to> lock. |
| 1091 | * |
| 1092 | * Returns: |
| 1093 | * In case of error, one of the following values is returned: |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1094 | * 1) FFA_INVALID_PARAMETERS - The endpoint provided parameters were |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1095 | * erroneous; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1096 | * 2) FFA_NO_MEMORY - Hafnium did not have sufficient memory to complete |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1097 | * the request. |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1098 | * Success is indicated by FFA_SUCCESS. |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1099 | */ |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1100 | static struct ffa_value ffa_tee_reclaim_check_update( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1101 | struct vm_locked to_locked, ffa_memory_handle_t handle, |
| 1102 | struct ffa_memory_region_constituent *constituents, |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1103 | uint32_t constituent_count, uint32_t memory_to_attributes, bool clear, |
| 1104 | struct mpool *page_pool) |
| 1105 | { |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1106 | uint32_t to_mode; |
| 1107 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1108 | struct ffa_value ret; |
| 1109 | ffa_memory_region_flags_t tee_flags; |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1110 | |
| 1111 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1112 | * Make sure constituents are properly aligned to a 64-bit boundary. If |
| 1113 | * not we would get alignment faults trying to read (64-bit) values. |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1114 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1115 | if (!is_aligned(constituents, 8)) { |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1116 | dlog_verbose("Constituents not aligned.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1117 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | /* |
| 1121 | * Check if the state transition is lawful for the recipient, and ensure |
| 1122 | * that all constituents of the memory region being retrieved are at the |
| 1123 | * same state. |
| 1124 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1125 | ret = ffa_retrieve_check_transition(to_locked, FFA_MEM_RECLAIM_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1126 | &constituents, &constituent_count, |
| 1127 | 1, memory_to_attributes, &to_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1128 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1129 | dlog_verbose("Invalid transition.\n"); |
| 1130 | return ret; |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Create a local pool so any freed memory can't be used by another |
| 1135 | * thread. This is to ensure the original mapping can be restored if the |
| 1136 | * clear fails. |
| 1137 | */ |
| 1138 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1139 | |
| 1140 | /* |
| 1141 | * First reserve all required memory for the new page table entries in |
| 1142 | * the recipient page tables without committing, to make sure the entire |
| 1143 | * operation will succeed without exhausting the page pool. |
| 1144 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1145 | if (!ffa_region_group_identity_map(to_locked, &constituents, |
| 1146 | &constituent_count, 1, to_mode, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1147 | page_pool, false)) { |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1148 | /* TODO: partial defrag of failed range. */ |
| 1149 | dlog_verbose( |
| 1150 | "Insufficient memory to update recipient page " |
| 1151 | "table.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1152 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1153 | goto out; |
| 1154 | } |
| 1155 | |
| 1156 | /* |
| 1157 | * Forward the request to the TEE and see what happens. |
| 1158 | */ |
| 1159 | tee_flags = 0; |
| 1160 | if (clear) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1161 | tee_flags |= FFA_MEMORY_REGION_FLAG_CLEAR; |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1162 | } |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 1163 | ret = arch_other_world_call( |
| 1164 | (struct ffa_value){.func = FFA_MEM_RECLAIM_32, |
| 1165 | .arg1 = (uint32_t)handle, |
| 1166 | .arg2 = (uint32_t)(handle >> 32), |
| 1167 | .arg3 = tee_flags}); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1168 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1169 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1170 | dlog_verbose( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1171 | "Got %#x (%d) from TEE in response to FFA_MEM_RECLAIM, " |
| 1172 | "expected FFA_SUCCESS.\n", |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1173 | ret.func, ret.arg2); |
| 1174 | goto out; |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * The TEE was happy with it, so complete the reclaim by mapping the |
| 1179 | * memory into the recipient. This won't allocate because the |
| 1180 | * transaction was already prepared above, so it doesn't need to use the |
| 1181 | * `local_page_pool`. |
| 1182 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1183 | CHECK(ffa_region_group_identity_map(to_locked, &constituents, |
| 1184 | &constituent_count, 1, to_mode, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1185 | page_pool, true)); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1186 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1187 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1188 | |
| 1189 | out: |
| 1190 | mpool_fini(&local_page_pool); |
| 1191 | |
| 1192 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1193 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1194 | * error) or merging entries into blocks where possible (on success). |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1195 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1196 | vm_ptable_defrag(to_locked, page_pool); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 1197 | |
| 1198 | return ret; |
| 1199 | } |
| 1200 | |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 1201 | static struct ffa_value ffa_relinquish_check_update( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1202 | struct vm_locked from_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1203 | struct ffa_memory_region_constituent **fragments, |
| 1204 | uint32_t *fragment_constituent_counts, uint32_t fragment_count, |
| 1205 | struct mpool *page_pool, bool clear) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1206 | { |
| 1207 | uint32_t orig_from_mode; |
| 1208 | uint32_t from_mode; |
| 1209 | struct mpool local_page_pool; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1210 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1211 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1212 | ret = ffa_relinquish_check_transition( |
| 1213 | from_locked, &orig_from_mode, fragments, |
| 1214 | fragment_constituent_counts, fragment_count, &from_mode); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1215 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1216 | dlog_verbose("Invalid transition for relinquish.\n"); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1217 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1218 | } |
| 1219 | |
| 1220 | /* |
| 1221 | * Create a local pool so any freed memory can't be used by another |
| 1222 | * thread. This is to ensure the original mapping can be restored if the |
| 1223 | * clear fails. |
| 1224 | */ |
| 1225 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1226 | |
| 1227 | /* |
| 1228 | * First reserve all required memory for the new page table entries |
| 1229 | * without committing, to make sure the entire operation will succeed |
| 1230 | * without exhausting the page pool. |
| 1231 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1232 | if (!ffa_region_group_identity_map( |
| 1233 | from_locked, fragments, fragment_constituent_counts, |
| 1234 | fragment_count, from_mode, page_pool, false)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1235 | /* TODO: partial defrag of failed range. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1236 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1237 | goto out; |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * Update the mapping for the sender. This won't allocate because the |
| 1242 | * transaction was already prepared above, but may free pages in the |
| 1243 | * case that a whole block is being unmapped that was previously |
| 1244 | * partially mapped. |
| 1245 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1246 | CHECK(ffa_region_group_identity_map( |
| 1247 | from_locked, fragments, fragment_constituent_counts, |
| 1248 | fragment_count, from_mode, &local_page_pool, true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1249 | |
| 1250 | /* Clear the memory so no VM or device can see the previous contents. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1251 | if (clear && !ffa_clear_memory_constituents( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1252 | fragments, fragment_constituent_counts, |
| 1253 | fragment_count, page_pool)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1254 | /* |
| 1255 | * On failure, roll back by returning memory to the sender. This |
| 1256 | * may allocate pages which were previously freed into |
| 1257 | * `local_page_pool` by the call above, but will never allocate |
| 1258 | * more pages than that so can never fail. |
| 1259 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1260 | CHECK(ffa_region_group_identity_map( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1261 | from_locked, fragments, fragment_constituent_counts, |
| 1262 | fragment_count, orig_from_mode, &local_page_pool, |
| 1263 | true)); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1264 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1265 | ret = ffa_error(FFA_NO_MEMORY); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1266 | goto out; |
| 1267 | } |
| 1268 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1269 | ret = (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1270 | |
| 1271 | out: |
| 1272 | mpool_fini(&local_page_pool); |
| 1273 | |
| 1274 | /* |
| 1275 | * Tidy up the page table by reclaiming failed mappings (if there was an |
| 1276 | * error) or merging entries into blocks where possible (on success). |
| 1277 | */ |
Raghu Krishnamurthy | 7ad3d14 | 2021-03-28 00:47:35 -0700 | [diff] [blame] | 1278 | vm_ptable_defrag(from_locked, page_pool); |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1279 | |
| 1280 | return ret; |
| 1281 | } |
| 1282 | |
| 1283 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1284 | * Complete a memory sending operation by checking that it is valid, updating |
| 1285 | * the sender page table, and then either marking the share state as having |
| 1286 | * completed sending (on success) or freeing it (on failure). |
| 1287 | * |
| 1288 | * Returns FFA_SUCCESS with the handle encoded, or the relevant FFA_ERROR. |
| 1289 | */ |
| 1290 | static struct ffa_value ffa_memory_send_complete( |
| 1291 | struct vm_locked from_locked, struct share_states_locked share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1292 | struct ffa_memory_share_state *share_state, struct mpool *page_pool, |
| 1293 | uint32_t *orig_from_mode_ret) |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1294 | { |
| 1295 | struct ffa_memory_region *memory_region = share_state->memory_region; |
| 1296 | struct ffa_value ret; |
| 1297 | |
| 1298 | /* Lock must be held. */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 1299 | assert(share_states.share_states != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1300 | |
| 1301 | /* Check that state is valid in sender page table and update. */ |
| 1302 | ret = ffa_send_check_update( |
| 1303 | from_locked, share_state->fragments, |
| 1304 | share_state->fragment_constituent_counts, |
| 1305 | share_state->fragment_count, share_state->share_func, |
| 1306 | memory_region->receivers[0].receiver_permissions.permissions, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1307 | page_pool, memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
| 1308 | orig_from_mode_ret); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1309 | if (ret.func != FFA_SUCCESS_32) { |
| 1310 | /* |
| 1311 | * Free share state, it failed to send so it can't be retrieved. |
| 1312 | */ |
| 1313 | dlog_verbose("Complete failed, freeing share state.\n"); |
| 1314 | share_state_free(share_states, share_state, page_pool); |
| 1315 | return ret; |
| 1316 | } |
| 1317 | |
| 1318 | share_state->sending_complete = true; |
| 1319 | dlog_verbose("Marked sending complete.\n"); |
| 1320 | |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1321 | return ffa_mem_success(share_state->memory_region->handle); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | /** |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1325 | * Check that the given `memory_region` represents a valid memory send request |
| 1326 | * of the given `share_func` type, return the clear flag and permissions via the |
| 1327 | * respective output parameters, and update the permissions if necessary. |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1328 | * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1329 | * 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] | 1330 | * not. |
| 1331 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1332 | static struct ffa_value ffa_memory_send_validate( |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1333 | struct vm_locked from_locked, struct ffa_memory_region *memory_region, |
| 1334 | uint32_t memory_share_length, uint32_t fragment_length, |
| 1335 | uint32_t share_func, ffa_memory_access_permissions_t *permissions) |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1336 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1337 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1338 | uint32_t receivers_length; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1339 | uint32_t constituents_offset; |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1340 | uint32_t constituents_length; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1341 | enum ffa_data_access data_access; |
| 1342 | enum ffa_instruction_access instruction_access; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1343 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 1344 | assert(permissions != NULL); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1345 | |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1346 | /* |
| 1347 | * This should already be checked by the caller, just making the |
| 1348 | * assumption clear here. |
| 1349 | */ |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 1350 | assert(memory_region->receiver_count == 1); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1351 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1352 | /* The sender must match the message sender. */ |
| 1353 | if (memory_region->sender != from_locked.vm->id) { |
| 1354 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1355 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1356 | } |
| 1357 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1358 | /* |
| 1359 | * Ensure that the composite header is within the memory bounds and |
| 1360 | * doesn't overlap the first part of the message. |
| 1361 | */ |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1362 | receivers_length = sizeof(struct ffa_memory_access) * |
| 1363 | memory_region->receiver_count; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1364 | constituents_offset = |
| 1365 | ffa_composite_constituent_offset(memory_region, 0); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1366 | if (memory_region->receivers[0].composite_memory_region_offset < |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1367 | sizeof(struct ffa_memory_region) + receivers_length || |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1368 | constituents_offset > fragment_length) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1369 | dlog_verbose( |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1370 | "Invalid composite memory region descriptor offset " |
| 1371 | "%d.\n", |
| 1372 | memory_region->receivers[0] |
| 1373 | .composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1374 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1375 | } |
| 1376 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1377 | composite = ffa_memory_region_get_composite(memory_region, 0); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1378 | |
| 1379 | /* |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 1380 | * Ensure the number of constituents are within the memory bounds. |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1381 | */ |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1382 | constituents_length = sizeof(struct ffa_memory_region_constituent) * |
| 1383 | composite->constituent_count; |
Andrew Walbran | 352aa3d | 2020-05-01 17:51:33 +0100 | [diff] [blame] | 1384 | if (memory_share_length != constituents_offset + constituents_length) { |
| 1385 | dlog_verbose("Invalid length %d or composite offset %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1386 | memory_share_length, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1387 | memory_region->receivers[0] |
| 1388 | .composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1389 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1390 | } |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1391 | if (fragment_length < memory_share_length && |
| 1392 | fragment_length < HF_MAILBOX_SIZE) { |
| 1393 | dlog_warning( |
| 1394 | "Initial fragment length %d smaller than mailbox " |
| 1395 | "size.\n", |
| 1396 | fragment_length); |
| 1397 | } |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1398 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1399 | /* |
| 1400 | * Clear is not allowed for memory sharing, as the sender still has |
| 1401 | * access to the memory. |
| 1402 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1403 | if ((memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR) && |
| 1404 | share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1405 | dlog_verbose("Memory can't be cleared while being shared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1406 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1407 | } |
| 1408 | |
| 1409 | /* No other flags are allowed/supported here. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1410 | if (memory_region->flags & ~FFA_MEMORY_REGION_FLAG_CLEAR) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1411 | dlog_verbose("Invalid flags %#x.\n", memory_region->flags); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1412 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | /* Check that the permissions are valid. */ |
| 1416 | *permissions = |
| 1417 | memory_region->receivers[0].receiver_permissions.permissions; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1418 | data_access = ffa_get_data_access_attr(*permissions); |
| 1419 | instruction_access = ffa_get_instruction_access_attr(*permissions); |
| 1420 | if (data_access == FFA_DATA_ACCESS_RESERVED || |
| 1421 | instruction_access == FFA_INSTRUCTION_ACCESS_RESERVED) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1422 | dlog_verbose("Reserved value for receiver permissions %#x.\n", |
| 1423 | *permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1424 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1425 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1426 | if (instruction_access != FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1427 | dlog_verbose( |
| 1428 | "Invalid instruction access permissions %#x for " |
| 1429 | "sending memory.\n", |
| 1430 | *permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1431 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1432 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1433 | if (share_func == FFA_MEM_SHARE_32) { |
| 1434 | if (data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1435 | dlog_verbose( |
| 1436 | "Invalid data access permissions %#x for " |
| 1437 | "sharing memory.\n", |
| 1438 | *permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1439 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1440 | } |
| 1441 | /* |
Andrew Walbran | dd8248f | 2020-06-22 13:39:30 +0100 | [diff] [blame] | 1442 | * According to section 5.11.3 of the FF-A 1.0 spec NX is |
| 1443 | * required for share operations (but must not be specified by |
| 1444 | * the sender) so set it in the copy that we store, ready to be |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1445 | * returned to the retriever. |
| 1446 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1447 | ffa_set_instruction_access_attr(permissions, |
| 1448 | FFA_INSTRUCTION_ACCESS_NX); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1449 | memory_region->receivers[0].receiver_permissions.permissions = |
| 1450 | *permissions; |
| 1451 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1452 | if (share_func == FFA_MEM_LEND_32 && |
| 1453 | data_access == FFA_DATA_ACCESS_NOT_SPECIFIED) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1454 | dlog_verbose( |
| 1455 | "Invalid data access permissions %#x for lending " |
| 1456 | "memory.\n", |
| 1457 | *permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1458 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1459 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1460 | if (share_func == FFA_MEM_DONATE_32 && |
| 1461 | data_access != FFA_DATA_ACCESS_NOT_SPECIFIED) { |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1462 | dlog_verbose( |
| 1463 | "Invalid data access permissions %#x for donating " |
| 1464 | "memory.\n", |
| 1465 | *permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1466 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1467 | } |
| 1468 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1469 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1470 | } |
| 1471 | |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1472 | /** Forwards a memory send message on to the TEE. */ |
| 1473 | static struct ffa_value memory_send_tee_forward( |
| 1474 | struct vm_locked tee_locked, ffa_vm_id_t sender_vm_id, |
| 1475 | uint32_t share_func, struct ffa_memory_region *memory_region, |
| 1476 | uint32_t memory_share_length, uint32_t fragment_length) |
| 1477 | { |
| 1478 | struct ffa_value ret; |
| 1479 | |
| 1480 | memcpy_s(tee_locked.vm->mailbox.recv, FFA_MSG_PAYLOAD_MAX, |
| 1481 | memory_region, fragment_length); |
| 1482 | tee_locked.vm->mailbox.recv_size = fragment_length; |
| 1483 | tee_locked.vm->mailbox.recv_sender = sender_vm_id; |
| 1484 | tee_locked.vm->mailbox.recv_func = share_func; |
| 1485 | tee_locked.vm->mailbox.state = MAILBOX_STATE_RECEIVED; |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 1486 | ret = arch_other_world_call( |
| 1487 | (struct ffa_value){.func = share_func, |
| 1488 | .arg1 = memory_share_length, |
| 1489 | .arg2 = fragment_length}); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1490 | /* |
| 1491 | * After the call to the TEE completes it must have finished reading its |
| 1492 | * RX buffer, so it is ready for another message. |
| 1493 | */ |
| 1494 | tee_locked.vm->mailbox.state = MAILBOX_STATE_EMPTY; |
| 1495 | |
| 1496 | return ret; |
| 1497 | } |
| 1498 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1499 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1500 | * Gets the share state for continuing an operation to donate, lend or share |
| 1501 | * memory, and checks that it is a valid request. |
| 1502 | * |
| 1503 | * Returns FFA_SUCCESS if the request was valid, or the relevant FFA_ERROR if |
| 1504 | * not. |
| 1505 | */ |
| 1506 | static struct ffa_value ffa_memory_send_continue_validate( |
| 1507 | struct share_states_locked share_states, ffa_memory_handle_t handle, |
| 1508 | struct ffa_memory_share_state **share_state_ret, ffa_vm_id_t from_vm_id, |
| 1509 | struct mpool *page_pool) |
| 1510 | { |
| 1511 | struct ffa_memory_share_state *share_state; |
| 1512 | struct ffa_memory_region *memory_region; |
| 1513 | |
Daniel Boulby | a2f8c66 | 2021-11-26 17:52:53 +0000 | [diff] [blame^] | 1514 | assert(share_state_ret != NULL); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1515 | |
| 1516 | /* |
| 1517 | * Look up the share state by handle and make sure that the VM ID |
| 1518 | * matches. |
| 1519 | */ |
| 1520 | if (!get_share_state(share_states, handle, &share_state)) { |
| 1521 | dlog_verbose( |
| 1522 | "Invalid handle %#x for memory send continuation.\n", |
| 1523 | handle); |
| 1524 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1525 | } |
| 1526 | memory_region = share_state->memory_region; |
| 1527 | |
| 1528 | if (memory_region->sender != from_vm_id) { |
| 1529 | dlog_verbose("Invalid sender %d.\n", memory_region->sender); |
| 1530 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1531 | } |
| 1532 | |
| 1533 | if (share_state->sending_complete) { |
| 1534 | dlog_verbose( |
| 1535 | "Sending of memory handle %#x is already complete.\n", |
| 1536 | handle); |
| 1537 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 1538 | } |
| 1539 | |
| 1540 | if (share_state->fragment_count == MAX_FRAGMENTS) { |
| 1541 | /* |
| 1542 | * Log a warning as this is a sign that MAX_FRAGMENTS should |
| 1543 | * probably be increased. |
| 1544 | */ |
| 1545 | dlog_warning( |
| 1546 | "Too many fragments for memory share with handle %#x; " |
| 1547 | "only %d supported.\n", |
| 1548 | handle, MAX_FRAGMENTS); |
| 1549 | /* Free share state, as it's not possible to complete it. */ |
| 1550 | share_state_free(share_states, share_state, page_pool); |
| 1551 | return ffa_error(FFA_NO_MEMORY); |
| 1552 | } |
| 1553 | |
| 1554 | *share_state_ret = share_state; |
| 1555 | |
| 1556 | return (struct ffa_value){.func = FFA_SUCCESS_32}; |
| 1557 | } |
| 1558 | |
| 1559 | /** |
| 1560 | * Forwards a memory send continuation message on to the TEE. |
| 1561 | */ |
| 1562 | static struct ffa_value memory_send_continue_tee_forward( |
| 1563 | struct vm_locked tee_locked, ffa_vm_id_t sender_vm_id, void *fragment, |
| 1564 | uint32_t fragment_length, ffa_memory_handle_t handle) |
| 1565 | { |
| 1566 | struct ffa_value ret; |
| 1567 | |
| 1568 | memcpy_s(tee_locked.vm->mailbox.recv, FFA_MSG_PAYLOAD_MAX, fragment, |
| 1569 | fragment_length); |
| 1570 | tee_locked.vm->mailbox.recv_size = fragment_length; |
| 1571 | tee_locked.vm->mailbox.recv_sender = sender_vm_id; |
| 1572 | tee_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
| 1573 | tee_locked.vm->mailbox.state = MAILBOX_STATE_RECEIVED; |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 1574 | ret = arch_other_world_call( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1575 | (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 1576 | .arg1 = (uint32_t)handle, |
| 1577 | .arg2 = (uint32_t)(handle >> 32), |
| 1578 | .arg3 = fragment_length, |
| 1579 | .arg4 = (uint64_t)sender_vm_id << 16}); |
| 1580 | /* |
| 1581 | * After the call to the TEE completes it must have finished reading its |
| 1582 | * RX buffer, so it is ready for another message. |
| 1583 | */ |
| 1584 | tee_locked.vm->mailbox.state = MAILBOX_STATE_EMPTY; |
| 1585 | |
| 1586 | return ret; |
| 1587 | } |
| 1588 | |
| 1589 | /** |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1590 | * Validates a call to donate, lend or share memory to a non-TEE VM and then |
| 1591 | * updates the stage-2 page tables. Specifically, check if the message length |
| 1592 | * and number of memory region constituents match, and if the transition is |
| 1593 | * valid for the type of memory sending operation. |
Andrew Walbran | 475c145 | 2020-02-07 13:22:22 +0000 | [diff] [blame] | 1594 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1595 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1596 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1597 | * allocated page from Hafnium's internal pool. The caller must have also |
| 1598 | * validated that the receiver VM ID is valid. |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1599 | * |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1600 | * This function takes ownership of the `memory_region` passed in and will free |
| 1601 | * it when necessary; it must not be freed by the caller. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1602 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1603 | struct ffa_value ffa_memory_send(struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1604 | struct ffa_memory_region *memory_region, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 1605 | uint32_t memory_share_length, |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1606 | uint32_t fragment_length, uint32_t share_func, |
| 1607 | struct mpool *page_pool) |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1608 | { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1609 | ffa_memory_access_permissions_t permissions; |
| 1610 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1611 | struct share_states_locked share_states; |
| 1612 | struct ffa_memory_share_state *share_state; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1613 | |
| 1614 | /* |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1615 | * If there is an error validating the `memory_region` then we need to |
| 1616 | * free it because we own it but we won't be storing it in a share state |
| 1617 | * after all. |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1618 | */ |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1619 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1620 | memory_share_length, fragment_length, |
| 1621 | share_func, &permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1622 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1623 | mpool_free(page_pool, memory_region); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1624 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1625 | } |
| 1626 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1627 | /* Set flag for share function, ready to be retrieved later. */ |
| 1628 | switch (share_func) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1629 | case FFA_MEM_SHARE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1630 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1631 | FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1632 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1633 | case FFA_MEM_LEND_32: |
| 1634 | memory_region->flags |= FFA_MEMORY_REGION_TRANSACTION_TYPE_LEND; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1635 | break; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1636 | case FFA_MEM_DONATE_32: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1637 | memory_region->flags |= |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 1638 | FFA_MEMORY_REGION_TRANSACTION_TYPE_DONATE; |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 1639 | break; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 1640 | } |
| 1641 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1642 | share_states = share_states_lock(); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1643 | /* |
| 1644 | * Allocate a share state before updating the page table. Otherwise if |
| 1645 | * updating the page table succeeded but allocating the share state |
| 1646 | * failed then it would leave the memory in a state where nobody could |
| 1647 | * get it back. |
| 1648 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1649 | if (!allocate_share_state(share_states, share_func, memory_region, |
| 1650 | fragment_length, FFA_MEMORY_HANDLE_INVALID, |
| 1651 | &share_state)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1652 | dlog_verbose("Failed to allocate share state.\n"); |
| 1653 | mpool_free(page_pool, memory_region); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1654 | ret = ffa_error(FFA_NO_MEMORY); |
| 1655 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1656 | } |
| 1657 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1658 | if (fragment_length == memory_share_length) { |
| 1659 | /* No more fragments to come, everything fit in one message. */ |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1660 | ret = ffa_memory_send_complete( |
| 1661 | from_locked, share_states, share_state, page_pool, |
| 1662 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1663 | } else { |
| 1664 | ret = (struct ffa_value){ |
| 1665 | .func = FFA_MEM_FRAG_RX_32, |
J-Alves | ee68c54 | 2020-10-29 17:48:20 +0000 | [diff] [blame] | 1666 | .arg1 = (uint32_t)memory_region->handle, |
| 1667 | .arg2 = (uint32_t)(memory_region->handle >> 32), |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1668 | .arg3 = fragment_length}; |
| 1669 | } |
| 1670 | |
| 1671 | out: |
| 1672 | share_states_unlock(&share_states); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1673 | dump_share_states(); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1674 | return ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1675 | } |
| 1676 | |
| 1677 | /** |
| 1678 | * Validates a call to donate, lend or share memory to the TEE and then updates |
| 1679 | * the stage-2 page tables. Specifically, check if the message length and number |
| 1680 | * of memory region constituents match, and if the transition is valid for the |
| 1681 | * type of memory sending operation. |
| 1682 | * |
| 1683 | * Assumes that the caller has already found and locked the sender VM and the |
| 1684 | * TEE VM, and copied the memory region descriptor from the sender's TX buffer |
| 1685 | * to a freshly allocated page from Hafnium's internal pool. The caller must |
| 1686 | * have also validated that the receiver VM ID is valid. |
| 1687 | * |
| 1688 | * This function takes ownership of the `memory_region` passed in and will free |
| 1689 | * it when necessary; it must not be freed by the caller. |
| 1690 | */ |
| 1691 | struct ffa_value ffa_memory_tee_send( |
| 1692 | struct vm_locked from_locked, struct vm_locked to_locked, |
| 1693 | struct ffa_memory_region *memory_region, uint32_t memory_share_length, |
| 1694 | uint32_t fragment_length, uint32_t share_func, struct mpool *page_pool) |
| 1695 | { |
| 1696 | ffa_memory_access_permissions_t permissions; |
| 1697 | struct ffa_value ret; |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1698 | |
| 1699 | /* |
| 1700 | * If there is an error validating the `memory_region` then we need to |
| 1701 | * free it because we own it but we won't be storing it in a share state |
| 1702 | * after all. |
| 1703 | */ |
| 1704 | ret = ffa_memory_send_validate(from_locked, memory_region, |
| 1705 | memory_share_length, fragment_length, |
| 1706 | share_func, &permissions); |
| 1707 | if (ret.func != FFA_SUCCESS_32) { |
| 1708 | goto out; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1709 | } |
| 1710 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1711 | if (fragment_length == memory_share_length) { |
| 1712 | /* No more fragments to come, everything fit in one message. */ |
| 1713 | struct ffa_composite_memory_region *composite = |
| 1714 | ffa_memory_region_get_composite(memory_region, 0); |
| 1715 | struct ffa_memory_region_constituent *constituents = |
| 1716 | composite->constituents; |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1717 | struct mpool local_page_pool; |
| 1718 | uint32_t orig_from_mode; |
| 1719 | |
| 1720 | /* |
| 1721 | * Use a local page pool so that we can roll back if necessary. |
| 1722 | */ |
| 1723 | mpool_init_with_fallback(&local_page_pool, page_pool); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1724 | |
| 1725 | ret = ffa_send_check_update( |
| 1726 | from_locked, &constituents, |
| 1727 | &composite->constituent_count, 1, share_func, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1728 | permissions, &local_page_pool, |
| 1729 | memory_region->flags & FFA_MEMORY_REGION_FLAG_CLEAR, |
| 1730 | &orig_from_mode); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1731 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1732 | mpool_fini(&local_page_pool); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1733 | goto out; |
| 1734 | } |
| 1735 | |
| 1736 | /* Forward memory send message on to TEE. */ |
| 1737 | ret = memory_send_tee_forward( |
| 1738 | to_locked, from_locked.vm->id, share_func, |
| 1739 | memory_region, memory_share_length, fragment_length); |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1740 | |
| 1741 | if (ret.func != FFA_SUCCESS_32) { |
| 1742 | dlog_verbose( |
| 1743 | "TEE didn't successfully complete memory send " |
| 1744 | "operation; returned %#x (%d). Rolling back.\n", |
| 1745 | ret.func, ret.arg2); |
| 1746 | |
| 1747 | /* |
| 1748 | * The TEE failed to complete the send operation, so |
| 1749 | * roll back the page table update for the VM. This |
| 1750 | * can't fail because it won't try to allocate more |
| 1751 | * memory than was freed into the `local_page_pool` by |
| 1752 | * `ffa_send_check_update` in the initial update. |
| 1753 | */ |
| 1754 | CHECK(ffa_region_group_identity_map( |
| 1755 | from_locked, &constituents, |
| 1756 | &composite->constituent_count, 1, |
| 1757 | orig_from_mode, &local_page_pool, true)); |
| 1758 | } |
| 1759 | |
| 1760 | mpool_fini(&local_page_pool); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1761 | } else { |
| 1762 | struct share_states_locked share_states = share_states_lock(); |
| 1763 | ffa_memory_handle_t handle; |
| 1764 | |
| 1765 | /* |
| 1766 | * We need to wait for the rest of the fragments before we can |
| 1767 | * check whether the transaction is valid and unmap the memory. |
| 1768 | * Call the TEE so it can do its initial validation and assign a |
| 1769 | * handle, and allocate a share state to keep what we have so |
| 1770 | * far. |
| 1771 | */ |
| 1772 | ret = memory_send_tee_forward( |
| 1773 | to_locked, from_locked.vm->id, share_func, |
| 1774 | memory_region, memory_share_length, fragment_length); |
| 1775 | if (ret.func == FFA_ERROR_32) { |
| 1776 | goto out_unlock; |
| 1777 | } else if (ret.func != FFA_MEM_FRAG_RX_32) { |
| 1778 | dlog_warning( |
| 1779 | "Got %#x from TEE in response to %#x for " |
| 1780 | "fragment with with %d/%d, expected " |
| 1781 | "FFA_MEM_FRAG_RX.\n", |
| 1782 | ret.func, share_func, fragment_length, |
| 1783 | memory_share_length); |
| 1784 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1785 | goto out_unlock; |
| 1786 | } |
| 1787 | handle = ffa_frag_handle(ret); |
| 1788 | if (ret.arg3 != fragment_length) { |
| 1789 | dlog_warning( |
| 1790 | "Got unexpected fragment offset %d for " |
| 1791 | "FFA_MEM_FRAG_RX from TEE (expected %d).\n", |
| 1792 | ret.arg3, fragment_length); |
| 1793 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1794 | goto out_unlock; |
| 1795 | } |
| 1796 | if (ffa_frag_sender(ret) != from_locked.vm->id) { |
| 1797 | dlog_warning( |
| 1798 | "Got unexpected sender ID %d for " |
| 1799 | "FFA_MEM_FRAG_RX from TEE (expected %d).\n", |
| 1800 | ffa_frag_sender(ret), from_locked.vm->id); |
| 1801 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1802 | goto out_unlock; |
| 1803 | } |
| 1804 | |
| 1805 | if (!allocate_share_state(share_states, share_func, |
| 1806 | memory_region, fragment_length, |
| 1807 | handle, NULL)) { |
| 1808 | dlog_verbose("Failed to allocate share state.\n"); |
| 1809 | ret = ffa_error(FFA_NO_MEMORY); |
| 1810 | goto out_unlock; |
| 1811 | } |
| 1812 | /* |
| 1813 | * Don't free the memory region fragment, as it has been stored |
| 1814 | * in the share state. |
| 1815 | */ |
| 1816 | memory_region = NULL; |
| 1817 | out_unlock: |
| 1818 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1819 | } |
| 1820 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1821 | out: |
| 1822 | if (memory_region != NULL) { |
| 1823 | mpool_free(page_pool, memory_region); |
| 1824 | } |
| 1825 | dump_share_states(); |
| 1826 | return ret; |
| 1827 | } |
| 1828 | |
| 1829 | /** |
| 1830 | * Continues an operation to donate, lend or share memory to a non-TEE VM. If |
| 1831 | * this is the last fragment then checks that the transition is valid for the |
| 1832 | * type of memory sending operation and updates the stage-2 page tables of the |
| 1833 | * sender. |
| 1834 | * |
| 1835 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1836 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1837 | * allocated page from Hafnium's internal pool. |
| 1838 | * |
| 1839 | * This function takes ownership of the `fragment` passed in; it must not be |
| 1840 | * freed by the caller. |
| 1841 | */ |
| 1842 | struct ffa_value ffa_memory_send_continue(struct vm_locked from_locked, |
| 1843 | void *fragment, |
| 1844 | uint32_t fragment_length, |
| 1845 | ffa_memory_handle_t handle, |
| 1846 | struct mpool *page_pool) |
| 1847 | { |
| 1848 | struct share_states_locked share_states = share_states_lock(); |
| 1849 | struct ffa_memory_share_state *share_state; |
| 1850 | struct ffa_value ret; |
| 1851 | struct ffa_memory_region *memory_region; |
| 1852 | |
| 1853 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1854 | &share_state, |
| 1855 | from_locked.vm->id, page_pool); |
| 1856 | if (ret.func != FFA_SUCCESS_32) { |
| 1857 | goto out_free_fragment; |
| 1858 | } |
| 1859 | memory_region = share_state->memory_region; |
| 1860 | |
| 1861 | if (memory_region->receivers[0].receiver_permissions.receiver == |
| 1862 | HF_TEE_VM_ID) { |
| 1863 | dlog_error( |
| 1864 | "Got hypervisor-allocated handle for memory send to " |
| 1865 | "TEE. This should never happen, and indicates a bug in " |
| 1866 | "EL3 code.\n"); |
| 1867 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1868 | goto out_free_fragment; |
| 1869 | } |
| 1870 | |
| 1871 | /* Add this fragment. */ |
| 1872 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1873 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1874 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1875 | share_state->fragment_count++; |
| 1876 | |
| 1877 | /* Check whether the memory send operation is now ready to complete. */ |
| 1878 | if (share_state_sending_complete(share_states, share_state)) { |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 1879 | ret = ffa_memory_send_complete( |
| 1880 | from_locked, share_states, share_state, page_pool, |
| 1881 | &(share_state->sender_orig_mode)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1882 | } else { |
| 1883 | ret = (struct ffa_value){ |
| 1884 | .func = FFA_MEM_FRAG_RX_32, |
| 1885 | .arg1 = (uint32_t)handle, |
| 1886 | .arg2 = (uint32_t)(handle >> 32), |
| 1887 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1888 | share_state)}; |
| 1889 | } |
| 1890 | goto out; |
| 1891 | |
| 1892 | out_free_fragment: |
| 1893 | mpool_free(page_pool, fragment); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1894 | |
| 1895 | out: |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1896 | share_states_unlock(&share_states); |
Andrew Walbran | 1a86aa9 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1897 | return ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 1898 | } |
| 1899 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1900 | /** |
| 1901 | * Continues an operation to donate, lend or share memory to the TEE VM. If this |
| 1902 | * is the last fragment then checks that the transition is valid for the type of |
| 1903 | * memory sending operation and updates the stage-2 page tables of the sender. |
| 1904 | * |
| 1905 | * Assumes that the caller has already found and locked the sender VM and copied |
| 1906 | * the memory region descriptor from the sender's TX buffer to a freshly |
| 1907 | * allocated page from Hafnium's internal pool. |
| 1908 | * |
| 1909 | * This function takes ownership of the `memory_region` passed in and will free |
| 1910 | * it when necessary; it must not be freed by the caller. |
| 1911 | */ |
| 1912 | struct ffa_value ffa_memory_tee_send_continue(struct vm_locked from_locked, |
| 1913 | struct vm_locked to_locked, |
| 1914 | void *fragment, |
| 1915 | uint32_t fragment_length, |
| 1916 | ffa_memory_handle_t handle, |
| 1917 | struct mpool *page_pool) |
| 1918 | { |
| 1919 | struct share_states_locked share_states = share_states_lock(); |
| 1920 | struct ffa_memory_share_state *share_state; |
| 1921 | struct ffa_value ret; |
| 1922 | struct ffa_memory_region *memory_region; |
| 1923 | |
| 1924 | ret = ffa_memory_send_continue_validate(share_states, handle, |
| 1925 | &share_state, |
| 1926 | from_locked.vm->id, page_pool); |
| 1927 | if (ret.func != FFA_SUCCESS_32) { |
| 1928 | goto out_free_fragment; |
| 1929 | } |
| 1930 | memory_region = share_state->memory_region; |
| 1931 | |
| 1932 | if (memory_region->receivers[0].receiver_permissions.receiver != |
| 1933 | HF_TEE_VM_ID) { |
| 1934 | dlog_error( |
| 1935 | "Got SPM-allocated handle for memory send to non-TEE " |
| 1936 | "VM. This should never happen, and indicates a bug.\n"); |
| 1937 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 1938 | goto out_free_fragment; |
| 1939 | } |
| 1940 | |
| 1941 | if (to_locked.vm->mailbox.state != MAILBOX_STATE_EMPTY || |
| 1942 | to_locked.vm->mailbox.recv == NULL) { |
| 1943 | /* |
| 1944 | * If the TEE RX buffer is not available, tell the sender to |
| 1945 | * retry by returning the current offset again. |
| 1946 | */ |
| 1947 | ret = (struct ffa_value){ |
| 1948 | .func = FFA_MEM_FRAG_RX_32, |
| 1949 | .arg1 = (uint32_t)handle, |
| 1950 | .arg2 = (uint32_t)(handle >> 32), |
| 1951 | .arg3 = share_state_next_fragment_offset(share_states, |
| 1952 | share_state), |
| 1953 | }; |
| 1954 | goto out_free_fragment; |
| 1955 | } |
| 1956 | |
| 1957 | /* Add this fragment. */ |
| 1958 | share_state->fragments[share_state->fragment_count] = fragment; |
| 1959 | share_state->fragment_constituent_counts[share_state->fragment_count] = |
| 1960 | fragment_length / sizeof(struct ffa_memory_region_constituent); |
| 1961 | share_state->fragment_count++; |
| 1962 | |
| 1963 | /* Check whether the memory send operation is now ready to complete. */ |
| 1964 | if (share_state_sending_complete(share_states, share_state)) { |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1965 | struct mpool local_page_pool; |
| 1966 | uint32_t orig_from_mode; |
| 1967 | |
| 1968 | /* |
| 1969 | * Use a local page pool so that we can roll back if necessary. |
| 1970 | */ |
| 1971 | mpool_init_with_fallback(&local_page_pool, page_pool); |
| 1972 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1973 | ret = ffa_memory_send_complete(from_locked, share_states, |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1974 | share_state, &local_page_pool, |
| 1975 | &orig_from_mode); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1976 | |
| 1977 | if (ret.func == FFA_SUCCESS_32) { |
| 1978 | /* |
| 1979 | * Forward final fragment on to the TEE so that |
| 1980 | * it can complete the memory sending operation. |
| 1981 | */ |
| 1982 | ret = memory_send_continue_tee_forward( |
| 1983 | to_locked, from_locked.vm->id, fragment, |
| 1984 | fragment_length, handle); |
| 1985 | |
| 1986 | if (ret.func != FFA_SUCCESS_32) { |
| 1987 | /* |
| 1988 | * The error will be passed on to the caller, |
| 1989 | * but log it here too. |
| 1990 | */ |
| 1991 | dlog_verbose( |
| 1992 | "TEE didn't successfully complete " |
| 1993 | "memory send operation; returned %#x " |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1994 | "(%d). Rolling back.\n", |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 1995 | ret.func, ret.arg2); |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 1996 | |
| 1997 | /* |
| 1998 | * The TEE failed to complete the send |
| 1999 | * operation, so roll back the page table update |
| 2000 | * for the VM. This can't fail because it won't |
| 2001 | * try to allocate more memory than was freed |
| 2002 | * into the `local_page_pool` by |
| 2003 | * `ffa_send_check_update` in the initial |
| 2004 | * update. |
| 2005 | */ |
| 2006 | CHECK(ffa_region_group_identity_map( |
| 2007 | from_locked, share_state->fragments, |
| 2008 | share_state |
| 2009 | ->fragment_constituent_counts, |
| 2010 | share_state->fragment_count, |
| 2011 | orig_from_mode, &local_page_pool, |
| 2012 | true)); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2013 | } |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 2014 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2015 | /* Free share state. */ |
| 2016 | share_state_free(share_states, share_state, page_pool); |
| 2017 | } else { |
| 2018 | /* Abort sending to TEE. */ |
| 2019 | struct ffa_value tee_ret = |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 2020 | arch_other_world_call((struct ffa_value){ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2021 | .func = FFA_MEM_RECLAIM_32, |
| 2022 | .arg1 = (uint32_t)handle, |
| 2023 | .arg2 = (uint32_t)(handle >> 32)}); |
| 2024 | |
| 2025 | if (tee_ret.func != FFA_SUCCESS_32) { |
| 2026 | /* |
| 2027 | * Nothing we can do if TEE doesn't abort |
| 2028 | * properly, just log it. |
| 2029 | */ |
| 2030 | dlog_verbose( |
| 2031 | "TEE didn't successfully abort failed " |
| 2032 | "memory send operation; returned %#x " |
| 2033 | "(%d).\n", |
| 2034 | tee_ret.func, tee_ret.arg2); |
| 2035 | } |
| 2036 | /* |
| 2037 | * We don't need to free the share state in this case |
| 2038 | * because ffa_memory_send_complete does that already. |
| 2039 | */ |
| 2040 | } |
Andrew Walbran | 37c574e | 2020-06-03 11:45:46 +0100 | [diff] [blame] | 2041 | |
| 2042 | mpool_fini(&local_page_pool); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2043 | } else { |
| 2044 | uint32_t next_fragment_offset = |
| 2045 | share_state_next_fragment_offset(share_states, |
| 2046 | share_state); |
| 2047 | |
| 2048 | ret = memory_send_continue_tee_forward( |
| 2049 | to_locked, from_locked.vm->id, fragment, |
| 2050 | fragment_length, handle); |
| 2051 | |
| 2052 | if (ret.func != FFA_MEM_FRAG_RX_32 || |
| 2053 | ffa_frag_handle(ret) != handle || |
| 2054 | ret.arg3 != next_fragment_offset || |
| 2055 | ffa_frag_sender(ret) != from_locked.vm->id) { |
| 2056 | dlog_verbose( |
| 2057 | "Got unexpected result from forwarding " |
| 2058 | "FFA_MEM_FRAG_TX to TEE: %#x (handle %#x, " |
| 2059 | "offset %d, sender %d); expected " |
| 2060 | "FFA_MEM_FRAG_RX (handle %#x, offset %d, " |
| 2061 | "sender %d).\n", |
| 2062 | ret.func, ffa_frag_handle(ret), ret.arg3, |
| 2063 | ffa_frag_sender(ret), handle, |
| 2064 | next_fragment_offset, from_locked.vm->id); |
| 2065 | /* Free share state. */ |
| 2066 | share_state_free(share_states, share_state, page_pool); |
| 2067 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2068 | goto out; |
| 2069 | } |
| 2070 | |
| 2071 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_RX_32, |
| 2072 | .arg1 = (uint32_t)handle, |
| 2073 | .arg2 = (uint32_t)(handle >> 32), |
| 2074 | .arg3 = next_fragment_offset}; |
| 2075 | } |
| 2076 | goto out; |
| 2077 | |
| 2078 | out_free_fragment: |
| 2079 | mpool_free(page_pool, fragment); |
| 2080 | |
| 2081 | out: |
| 2082 | share_states_unlock(&share_states); |
| 2083 | return ret; |
| 2084 | } |
| 2085 | |
| 2086 | /** Clean up after the receiver has finished retrieving a memory region. */ |
| 2087 | static void ffa_memory_retrieve_complete( |
| 2088 | struct share_states_locked share_states, |
| 2089 | struct ffa_memory_share_state *share_state, struct mpool *page_pool) |
| 2090 | { |
| 2091 | if (share_state->share_func == FFA_MEM_DONATE_32) { |
| 2092 | /* |
| 2093 | * Memory that has been donated can't be relinquished, |
| 2094 | * so no need to keep the share state around. |
| 2095 | */ |
| 2096 | share_state_free(share_states, share_state, page_pool); |
| 2097 | dlog_verbose("Freed share state for donate.\n"); |
| 2098 | } |
| 2099 | } |
| 2100 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2101 | struct ffa_value ffa_memory_retrieve(struct vm_locked to_locked, |
| 2102 | struct ffa_memory_region *retrieve_request, |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2103 | uint32_t retrieve_request_length, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2104 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2105 | { |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2106 | uint32_t expected_retrieve_request_length = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2107 | sizeof(struct ffa_memory_region) + |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2108 | retrieve_request->receiver_count * |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2109 | sizeof(struct ffa_memory_access); |
| 2110 | ffa_memory_handle_t handle = retrieve_request->handle; |
| 2111 | ffa_memory_region_flags_t transaction_type = |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2112 | retrieve_request->flags & |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2113 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK; |
| 2114 | struct ffa_memory_region *memory_region; |
| 2115 | ffa_memory_access_permissions_t sent_permissions; |
| 2116 | enum ffa_data_access sent_data_access; |
| 2117 | enum ffa_instruction_access sent_instruction_access; |
| 2118 | ffa_memory_access_permissions_t requested_permissions; |
| 2119 | enum ffa_data_access requested_data_access; |
| 2120 | enum ffa_instruction_access requested_instruction_access; |
| 2121 | ffa_memory_access_permissions_t permissions; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2122 | uint32_t memory_to_attributes; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2123 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2124 | struct ffa_memory_share_state *share_state; |
| 2125 | struct ffa_value ret; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2126 | struct ffa_composite_memory_region *composite; |
| 2127 | uint32_t total_length; |
| 2128 | uint32_t fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2129 | |
| 2130 | dump_share_states(); |
| 2131 | |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2132 | if (retrieve_request_length != expected_retrieve_request_length) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2133 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2134 | "Invalid length for FFA_MEM_RETRIEVE_REQ, expected %d " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2135 | "but was %d.\n", |
Andrew Walbran | 130a8ae | 2020-05-15 16:27:15 +0100 | [diff] [blame] | 2136 | expected_retrieve_request_length, |
| 2137 | retrieve_request_length); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2138 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2139 | } |
| 2140 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2141 | if (retrieve_request->receiver_count != 1) { |
| 2142 | dlog_verbose( |
| 2143 | "Multi-way memory sharing not supported (got %d " |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2144 | "receivers descriptors on FFA_MEM_RETRIEVE_REQ, " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2145 | "expected 1).\n", |
| 2146 | retrieve_request->receiver_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2147 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2148 | } |
| 2149 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2150 | share_states = share_states_lock(); |
| 2151 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2152 | dlog_verbose("Invalid handle %#x for FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2153 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2154 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2155 | goto out; |
| 2156 | } |
| 2157 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2158 | memory_region = share_state->memory_region; |
| 2159 | CHECK(memory_region != NULL); |
| 2160 | |
| 2161 | /* |
| 2162 | * Check that the transaction type expected by the receiver is correct, |
| 2163 | * if it has been specified. |
| 2164 | */ |
| 2165 | if (transaction_type != |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2166 | FFA_MEMORY_REGION_TRANSACTION_TYPE_UNSPECIFIED && |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2167 | transaction_type != (memory_region->flags & |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2168 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK)) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2169 | dlog_verbose( |
| 2170 | "Incorrect transaction type %#x for " |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2171 | "FFA_MEM_RETRIEVE_REQ, expected %#x for handle %#x.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2172 | transaction_type, |
| 2173 | memory_region->flags & |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2174 | FFA_MEMORY_REGION_TRANSACTION_TYPE_MASK, |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2175 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2176 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2177 | goto out; |
| 2178 | } |
| 2179 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2180 | if (retrieve_request->sender != memory_region->sender) { |
| 2181 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2182 | "Incorrect sender ID %d for FFA_MEM_RETRIEVE_REQ, " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2183 | "expected %d for handle %#x.\n", |
| 2184 | retrieve_request->sender, memory_region->sender, |
| 2185 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2186 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2187 | goto out; |
| 2188 | } |
| 2189 | |
| 2190 | if (retrieve_request->tag != memory_region->tag) { |
| 2191 | dlog_verbose( |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2192 | "Incorrect tag %d for FFA_MEM_RETRIEVE_REQ, expected " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2193 | "%d for handle %#x.\n", |
| 2194 | retrieve_request->tag, memory_region->tag, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2195 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2196 | goto out; |
| 2197 | } |
| 2198 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2199 | if (retrieve_request->receivers[0].receiver_permissions.receiver != |
| 2200 | to_locked.vm->id) { |
| 2201 | dlog_verbose( |
| 2202 | "Retrieve request receiver VM ID %d didn't match " |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2203 | "caller of FFA_MEM_RETRIEVE_REQ.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2204 | retrieve_request->receivers[0] |
| 2205 | .receiver_permissions.receiver); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2206 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2207 | goto out; |
| 2208 | } |
| 2209 | |
| 2210 | if (memory_region->receivers[0].receiver_permissions.receiver != |
| 2211 | to_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2212 | dlog_verbose( |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 2213 | "Incorrect receiver VM ID %d for FFA_MEM_RETRIEVE_REQ, " |
| 2214 | "expected %d for handle %#x.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2215 | to_locked.vm->id, |
| 2216 | memory_region->receivers[0] |
| 2217 | .receiver_permissions.receiver, |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2218 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2219 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2220 | goto out; |
| 2221 | } |
| 2222 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2223 | if (!share_state->sending_complete) { |
| 2224 | dlog_verbose( |
| 2225 | "Memory with handle %#x not fully sent, can't " |
| 2226 | "retrieve.\n", |
| 2227 | handle); |
| 2228 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2229 | goto out; |
| 2230 | } |
| 2231 | |
| 2232 | if (share_state->retrieved_fragment_count[0] != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2233 | dlog_verbose("Memory with handle %#x already retrieved.\n", |
| 2234 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2235 | ret = ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2236 | goto out; |
| 2237 | } |
| 2238 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2239 | if (retrieve_request->receivers[0].composite_memory_region_offset != |
| 2240 | 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2241 | dlog_verbose( |
| 2242 | "Retriever specified address ranges not supported (got " |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 2243 | "offset %d).\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2244 | retrieve_request->receivers[0] |
| 2245 | .composite_memory_region_offset); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2246 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2247 | goto out; |
| 2248 | } |
| 2249 | |
J-Alves | 84658fc | 2021-06-17 14:37:32 +0100 | [diff] [blame] | 2250 | if ((retrieve_request->flags & ~0x7FF) != 0U) { |
| 2251 | dlog_verbose( |
| 2252 | "Bits 31-10 must be zero in memory region's flags.\n"); |
| 2253 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2254 | goto out; |
| 2255 | } |
| 2256 | |
| 2257 | if (share_state->share_func == FFA_MEM_SHARE_32 && |
| 2258 | (retrieve_request->flags & |
| 2259 | (FFA_MEMORY_REGION_FLAG_CLEAR | |
| 2260 | FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH)) != 0U) { |
| 2261 | dlog_verbose( |
| 2262 | "Memory Share operation can't clean after relinquish " |
| 2263 | "memory region.\n"); |
| 2264 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2265 | goto out; |
| 2266 | } |
| 2267 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2268 | /* |
| 2269 | * Check permissions from sender against permissions requested by |
| 2270 | * receiver. |
| 2271 | */ |
| 2272 | /* TODO: Check attributes too. */ |
| 2273 | sent_permissions = |
| 2274 | memory_region->receivers[0].receiver_permissions.permissions; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2275 | sent_data_access = ffa_get_data_access_attr(sent_permissions); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2276 | sent_instruction_access = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2277 | ffa_get_instruction_access_attr(sent_permissions); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2278 | requested_permissions = |
| 2279 | retrieve_request->receivers[0].receiver_permissions.permissions; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2280 | requested_data_access = ffa_get_data_access_attr(requested_permissions); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2281 | requested_instruction_access = |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2282 | ffa_get_instruction_access_attr(requested_permissions); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2283 | permissions = 0; |
J-Alves | 84658fc | 2021-06-17 14:37:32 +0100 | [diff] [blame] | 2284 | |
| 2285 | if ((sent_data_access == FFA_DATA_ACCESS_RO || |
| 2286 | requested_permissions == FFA_DATA_ACCESS_RO) && |
| 2287 | (retrieve_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR) != 0U) { |
| 2288 | dlog_verbose( |
| 2289 | "Receiver has RO permissions can not request clear.\n"); |
| 2290 | ret = ffa_error(FFA_DENIED); |
| 2291 | goto out; |
| 2292 | } |
| 2293 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2294 | switch (sent_data_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2295 | case FFA_DATA_ACCESS_NOT_SPECIFIED: |
| 2296 | case FFA_DATA_ACCESS_RW: |
| 2297 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2298 | requested_data_access == FFA_DATA_ACCESS_RW) { |
| 2299 | ffa_set_data_access_attr(&permissions, |
| 2300 | FFA_DATA_ACCESS_RW); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2301 | break; |
| 2302 | } |
| 2303 | /* Intentional fall-through. */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2304 | case FFA_DATA_ACCESS_RO: |
| 2305 | if (requested_data_access == FFA_DATA_ACCESS_NOT_SPECIFIED || |
| 2306 | requested_data_access == FFA_DATA_ACCESS_RO) { |
| 2307 | ffa_set_data_access_attr(&permissions, |
| 2308 | FFA_DATA_ACCESS_RO); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2309 | break; |
| 2310 | } |
| 2311 | dlog_verbose( |
| 2312 | "Invalid data access requested; sender specified " |
| 2313 | "permissions %#x but receiver requested %#x.\n", |
| 2314 | sent_permissions, requested_permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2315 | ret = ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2316 | goto out; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2317 | case FFA_DATA_ACCESS_RESERVED: |
| 2318 | panic("Got unexpected FFA_DATA_ACCESS_RESERVED. Should be " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2319 | "checked before this point."); |
| 2320 | } |
| 2321 | switch (sent_instruction_access) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2322 | case FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED: |
| 2323 | case FFA_INSTRUCTION_ACCESS_X: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2324 | if (requested_instruction_access == |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2325 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2326 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_X) { |
| 2327 | ffa_set_instruction_access_attr( |
| 2328 | &permissions, FFA_INSTRUCTION_ACCESS_X); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2329 | break; |
| 2330 | } |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2331 | case FFA_INSTRUCTION_ACCESS_NX: |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2332 | if (requested_instruction_access == |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2333 | FFA_INSTRUCTION_ACCESS_NOT_SPECIFIED || |
| 2334 | requested_instruction_access == FFA_INSTRUCTION_ACCESS_NX) { |
| 2335 | ffa_set_instruction_access_attr( |
| 2336 | &permissions, FFA_INSTRUCTION_ACCESS_NX); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2337 | break; |
| 2338 | } |
| 2339 | dlog_verbose( |
| 2340 | "Invalid instruction access requested; sender " |
Andrew Walbran | f07f04d | 2020-05-01 18:09:00 +0100 | [diff] [blame] | 2341 | "specified permissions %#x but receiver requested " |
| 2342 | "%#x.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2343 | sent_permissions, requested_permissions); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2344 | ret = ffa_error(FFA_DENIED); |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2345 | goto out; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2346 | case FFA_INSTRUCTION_ACCESS_RESERVED: |
| 2347 | panic("Got unexpected FFA_INSTRUCTION_ACCESS_RESERVED. Should " |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2348 | "be checked before this point."); |
| 2349 | } |
J-Alves | 7cd5eb3 | 2020-10-16 19:06:10 +0100 | [diff] [blame] | 2350 | memory_to_attributes = ffa_memory_permissions_to_mode( |
| 2351 | permissions, share_state->sender_orig_mode); |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 2352 | ret = ffa_retrieve_check_update( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2353 | to_locked, share_state->fragments, |
| 2354 | share_state->fragment_constituent_counts, |
| 2355 | share_state->fragment_count, memory_to_attributes, |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 2356 | share_state->share_func, false, page_pool); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2357 | if (ret.func != FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2358 | goto out; |
| 2359 | } |
| 2360 | |
| 2361 | /* |
| 2362 | * Copy response to RX buffer of caller and deliver the message. This |
| 2363 | * must be done before the share_state is (possibly) freed. |
| 2364 | */ |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2365 | /* TODO: combine attributes from sender and request. */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2366 | composite = ffa_memory_region_get_composite(memory_region, 0); |
| 2367 | /* |
| 2368 | * Constituents which we received in the first fragment should always |
| 2369 | * fit in the first fragment we are sending, because the header is the |
| 2370 | * same size in both cases and we have a fixed message buffer size. So |
| 2371 | * `ffa_retrieved_memory_region_init` should never fail. |
| 2372 | */ |
| 2373 | CHECK(ffa_retrieved_memory_region_init( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2374 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2375 | memory_region->sender, memory_region->attributes, |
| 2376 | memory_region->flags, handle, to_locked.vm->id, permissions, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2377 | composite->page_count, composite->constituent_count, |
| 2378 | share_state->fragments[0], |
| 2379 | share_state->fragment_constituent_counts[0], &total_length, |
| 2380 | &fragment_length)); |
| 2381 | to_locked.vm->mailbox.recv_size = fragment_length; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2382 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2383 | to_locked.vm->mailbox.recv_func = FFA_MEM_RETRIEVE_RESP_32; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2384 | to_locked.vm->mailbox.state = MAILBOX_STATE_READ; |
| 2385 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2386 | share_state->retrieved_fragment_count[0] = 1; |
| 2387 | if (share_state->retrieved_fragment_count[0] == |
| 2388 | share_state->fragment_count) { |
| 2389 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2390 | page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2391 | } |
| 2392 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2393 | ret = (struct ffa_value){.func = FFA_MEM_RETRIEVE_RESP_32, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2394 | .arg1 = total_length, |
| 2395 | .arg2 = fragment_length}; |
| 2396 | |
| 2397 | out: |
| 2398 | share_states_unlock(&share_states); |
| 2399 | dump_share_states(); |
| 2400 | return ret; |
| 2401 | } |
| 2402 | |
| 2403 | struct ffa_value ffa_memory_retrieve_continue(struct vm_locked to_locked, |
| 2404 | ffa_memory_handle_t handle, |
| 2405 | uint32_t fragment_offset, |
| 2406 | struct mpool *page_pool) |
| 2407 | { |
| 2408 | struct ffa_memory_region *memory_region; |
| 2409 | struct share_states_locked share_states; |
| 2410 | struct ffa_memory_share_state *share_state; |
| 2411 | struct ffa_value ret; |
| 2412 | uint32_t fragment_index; |
| 2413 | uint32_t retrieved_constituents_count; |
| 2414 | uint32_t i; |
| 2415 | uint32_t expected_fragment_offset; |
| 2416 | uint32_t remaining_constituent_count; |
| 2417 | uint32_t fragment_length; |
| 2418 | |
| 2419 | dump_share_states(); |
| 2420 | |
| 2421 | share_states = share_states_lock(); |
| 2422 | if (!get_share_state(share_states, handle, &share_state)) { |
| 2423 | dlog_verbose("Invalid handle %#x for FFA_MEM_FRAG_RX.\n", |
| 2424 | handle); |
| 2425 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2426 | goto out; |
| 2427 | } |
| 2428 | |
| 2429 | memory_region = share_state->memory_region; |
| 2430 | CHECK(memory_region != NULL); |
| 2431 | |
| 2432 | if (memory_region->receivers[0].receiver_permissions.receiver != |
| 2433 | to_locked.vm->id) { |
| 2434 | dlog_verbose( |
| 2435 | "Caller of FFA_MEM_FRAG_RX (%d) is not receiver (%d) " |
| 2436 | "of handle %#x.\n", |
| 2437 | to_locked.vm->id, |
| 2438 | memory_region->receivers[0] |
| 2439 | .receiver_permissions.receiver, |
| 2440 | handle); |
| 2441 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2442 | goto out; |
| 2443 | } |
| 2444 | |
| 2445 | if (!share_state->sending_complete) { |
| 2446 | dlog_verbose( |
| 2447 | "Memory with handle %#x not fully sent, can't " |
| 2448 | "retrieve.\n", |
| 2449 | handle); |
| 2450 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2451 | goto out; |
| 2452 | } |
| 2453 | |
| 2454 | if (share_state->retrieved_fragment_count[0] == 0 || |
| 2455 | share_state->retrieved_fragment_count[0] >= |
| 2456 | share_state->fragment_count) { |
| 2457 | dlog_verbose( |
| 2458 | "Retrieval of memory with handle %#x not yet started " |
| 2459 | "or already completed (%d/%d fragments retrieved).\n", |
| 2460 | handle, share_state->retrieved_fragment_count[0], |
| 2461 | share_state->fragment_count); |
| 2462 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2463 | goto out; |
| 2464 | } |
| 2465 | |
| 2466 | fragment_index = share_state->retrieved_fragment_count[0]; |
| 2467 | |
| 2468 | /* |
| 2469 | * Check that the given fragment offset is correct by counting how many |
| 2470 | * constituents were in the fragments previously sent. |
| 2471 | */ |
| 2472 | retrieved_constituents_count = 0; |
| 2473 | for (i = 0; i < fragment_index; ++i) { |
| 2474 | retrieved_constituents_count += |
| 2475 | share_state->fragment_constituent_counts[i]; |
| 2476 | } |
| 2477 | expected_fragment_offset = |
| 2478 | ffa_composite_constituent_offset(memory_region, 0) + |
| 2479 | retrieved_constituents_count * |
| 2480 | sizeof(struct ffa_memory_region_constituent); |
| 2481 | if (fragment_offset != expected_fragment_offset) { |
| 2482 | dlog_verbose("Fragment offset was %d but expected %d.\n", |
| 2483 | fragment_offset, expected_fragment_offset); |
| 2484 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2485 | goto out; |
| 2486 | } |
| 2487 | |
| 2488 | remaining_constituent_count = ffa_memory_fragment_init( |
| 2489 | to_locked.vm->mailbox.recv, HF_MAILBOX_SIZE, |
| 2490 | share_state->fragments[fragment_index], |
| 2491 | share_state->fragment_constituent_counts[fragment_index], |
| 2492 | &fragment_length); |
| 2493 | CHECK(remaining_constituent_count == 0); |
| 2494 | to_locked.vm->mailbox.recv_size = fragment_length; |
| 2495 | to_locked.vm->mailbox.recv_sender = HF_HYPERVISOR_VM_ID; |
| 2496 | to_locked.vm->mailbox.recv_func = FFA_MEM_FRAG_TX_32; |
| 2497 | to_locked.vm->mailbox.state = MAILBOX_STATE_READ; |
| 2498 | share_state->retrieved_fragment_count[0]++; |
| 2499 | if (share_state->retrieved_fragment_count[0] == |
| 2500 | share_state->fragment_count) { |
| 2501 | ffa_memory_retrieve_complete(share_states, share_state, |
| 2502 | page_pool); |
| 2503 | } |
| 2504 | |
| 2505 | ret = (struct ffa_value){.func = FFA_MEM_FRAG_TX_32, |
| 2506 | .arg1 = (uint32_t)handle, |
| 2507 | .arg2 = (uint32_t)(handle >> 32), |
| 2508 | .arg3 = fragment_length}; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2509 | |
| 2510 | out: |
| 2511 | share_states_unlock(&share_states); |
| 2512 | dump_share_states(); |
| 2513 | return ret; |
| 2514 | } |
| 2515 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2516 | struct ffa_value ffa_memory_relinquish( |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2517 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2518 | struct ffa_mem_relinquish *relinquish_request, struct mpool *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 | ffa_memory_handle_t handle = relinquish_request->handle; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2521 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2522 | struct ffa_memory_share_state *share_state; |
| 2523 | struct ffa_memory_region *memory_region; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2524 | bool clear; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2525 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2526 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2527 | if (relinquish_request->endpoint_count != 1) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2528 | dlog_verbose( |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2529 | "Stream endpoints not supported (got %d endpoints on " |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2530 | "FFA_MEM_RELINQUISH, expected 1).\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2531 | relinquish_request->endpoint_count); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2532 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2533 | } |
| 2534 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2535 | if (relinquish_request->endpoints[0] != from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2536 | dlog_verbose( |
| 2537 | "VM ID %d in relinquish message doesn't match calling " |
| 2538 | "VM ID %d.\n", |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2539 | relinquish_request->endpoints[0], from_locked.vm->id); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2540 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2541 | } |
| 2542 | |
| 2543 | dump_share_states(); |
| 2544 | |
| 2545 | share_states = share_states_lock(); |
| 2546 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2547 | dlog_verbose("Invalid handle %#x for FFA_MEM_RELINQUISH.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2548 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2549 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2550 | goto out; |
| 2551 | } |
| 2552 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2553 | if (!share_state->sending_complete) { |
| 2554 | dlog_verbose( |
| 2555 | "Memory with handle %#x not fully sent, can't " |
| 2556 | "relinquish.\n", |
| 2557 | handle); |
| 2558 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2559 | goto out; |
| 2560 | } |
| 2561 | |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2562 | memory_region = share_state->memory_region; |
| 2563 | CHECK(memory_region != NULL); |
| 2564 | |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2565 | if (memory_region->receivers[0].receiver_permissions.receiver != |
| 2566 | from_locked.vm->id) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2567 | dlog_verbose( |
| 2568 | "VM ID %d tried to relinquish memory region with " |
| 2569 | "handle %#x but receiver was %d.\n", |
| 2570 | from_locked.vm->id, handle, |
Andrew Walbran | a65a132 | 2020-04-06 19:32:32 +0100 | [diff] [blame] | 2571 | memory_region->receivers[0] |
| 2572 | .receiver_permissions.receiver); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2573 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2574 | goto out; |
| 2575 | } |
| 2576 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2577 | if (share_state->retrieved_fragment_count[0] != |
| 2578 | share_state->fragment_count) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2579 | dlog_verbose( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2580 | "Memory with handle %#x not yet fully retrieved, can't " |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2581 | "relinquish.\n", |
| 2582 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2583 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2584 | goto out; |
| 2585 | } |
| 2586 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2587 | clear = relinquish_request->flags & FFA_MEMORY_REGION_FLAG_CLEAR; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2588 | |
| 2589 | /* |
| 2590 | * Clear is not allowed for memory that was shared, as the original |
| 2591 | * sender still has access to the memory. |
| 2592 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2593 | if (clear && share_state->share_func == FFA_MEM_SHARE_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2594 | dlog_verbose("Memory which was shared can't be cleared.\n"); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2595 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2596 | goto out; |
| 2597 | } |
| 2598 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2599 | ret = ffa_relinquish_check_update( |
| 2600 | from_locked, share_state->fragments, |
| 2601 | share_state->fragment_constituent_counts, |
| 2602 | share_state->fragment_count, page_pool, clear); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2603 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2604 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2605 | /* |
| 2606 | * Mark memory handle as not retrieved, so it can be reclaimed |
| 2607 | * (or retrieved again). |
| 2608 | */ |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2609 | share_state->retrieved_fragment_count[0] = 0; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2610 | } |
| 2611 | |
| 2612 | out: |
| 2613 | share_states_unlock(&share_states); |
| 2614 | dump_share_states(); |
| 2615 | return ret; |
| 2616 | } |
| 2617 | |
| 2618 | /** |
| 2619 | * Validates that the reclaim transition is allowed for the given handle, |
| 2620 | * updates the page table of the reclaiming VM, and frees the internal state |
| 2621 | * associated with the handle. |
| 2622 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2623 | struct ffa_value ffa_memory_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2624 | ffa_memory_handle_t handle, |
| 2625 | ffa_memory_region_flags_t flags, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2626 | struct mpool *page_pool) |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2627 | { |
| 2628 | struct share_states_locked share_states; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2629 | struct ffa_memory_share_state *share_state; |
| 2630 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2631 | struct ffa_value ret; |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2632 | |
| 2633 | dump_share_states(); |
| 2634 | |
| 2635 | share_states = share_states_lock(); |
| 2636 | if (!get_share_state(share_states, handle, &share_state)) { |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2637 | dlog_verbose("Invalid handle %#x for FFA_MEM_RECLAIM.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2638 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2639 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2640 | goto out; |
| 2641 | } |
| 2642 | |
| 2643 | memory_region = share_state->memory_region; |
| 2644 | CHECK(memory_region != NULL); |
| 2645 | |
| 2646 | if (to_locked.vm->id != memory_region->sender) { |
| 2647 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 2648 | "VM %#x attempted to reclaim memory handle %#x " |
| 2649 | "originally sent by VM %#x.\n", |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2650 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2651 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2652 | goto out; |
| 2653 | } |
| 2654 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2655 | if (!share_state->sending_complete) { |
| 2656 | dlog_verbose( |
| 2657 | "Memory with handle %#x not fully sent, can't " |
| 2658 | "reclaim.\n", |
| 2659 | handle); |
| 2660 | ret = ffa_error(FFA_INVALID_PARAMETERS); |
| 2661 | goto out; |
| 2662 | } |
| 2663 | |
| 2664 | if (share_state->retrieved_fragment_count[0] != 0) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2665 | dlog_verbose( |
| 2666 | "Tried to reclaim memory handle %#x that has not been " |
| 2667 | "relinquished.\n", |
| 2668 | handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2669 | ret = ffa_error(FFA_DENIED); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2670 | goto out; |
| 2671 | } |
| 2672 | |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2673 | ret = ffa_retrieve_check_update( |
| 2674 | to_locked, share_state->fragments, |
| 2675 | share_state->fragment_constituent_counts, |
J-Alves | 2a0d288 | 2020-10-29 14:49:50 +0000 | [diff] [blame] | 2676 | share_state->fragment_count, share_state->sender_orig_mode, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2677 | FFA_MEM_RECLAIM_32, flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2678 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2679 | if (ret.func == FFA_SUCCESS_32) { |
Andrew Walbran | 5de9c3d | 2020-02-10 13:35:29 +0000 | [diff] [blame] | 2680 | share_state_free(share_states, share_state, page_pool); |
| 2681 | dlog_verbose("Freed share state after successful reclaim.\n"); |
| 2682 | } |
| 2683 | |
| 2684 | out: |
| 2685 | share_states_unlock(&share_states); |
| 2686 | return ret; |
Jose Marinho | 09b1db8 | 2019-08-08 09:16:59 +0100 | [diff] [blame] | 2687 | } |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2688 | |
| 2689 | /** |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2690 | * Validates that the reclaim transition is allowed for the memory region with |
| 2691 | * the given handle which was previously shared with the TEE, tells the TEE to |
| 2692 | * mark it as reclaimed, and updates the page table of the reclaiming VM. |
| 2693 | * |
| 2694 | * To do this information about the memory region is first fetched from the TEE. |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2695 | */ |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2696 | struct ffa_value ffa_memory_tee_reclaim(struct vm_locked to_locked, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2697 | struct vm_locked from_locked, |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2698 | ffa_memory_handle_t handle, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2699 | ffa_memory_region_flags_t flags, |
| 2700 | struct mpool *page_pool) |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2701 | { |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2702 | uint32_t request_length = ffa_memory_lender_retrieve_request_init( |
| 2703 | from_locked.vm->mailbox.recv, handle, to_locked.vm->id); |
| 2704 | struct ffa_value tee_ret; |
| 2705 | uint32_t length; |
| 2706 | uint32_t fragment_length; |
| 2707 | uint32_t fragment_offset; |
| 2708 | struct ffa_memory_region *memory_region; |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2709 | struct ffa_composite_memory_region *composite; |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2710 | uint32_t memory_to_attributes = MM_MODE_R | MM_MODE_W | MM_MODE_X; |
| 2711 | |
| 2712 | CHECK(request_length <= HF_MAILBOX_SIZE); |
| 2713 | CHECK(from_locked.vm->id == HF_TEE_VM_ID); |
| 2714 | |
| 2715 | /* Retrieve memory region information from the TEE. */ |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 2716 | tee_ret = arch_other_world_call( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2717 | (struct ffa_value){.func = FFA_MEM_RETRIEVE_REQ_32, |
| 2718 | .arg1 = request_length, |
| 2719 | .arg2 = request_length}); |
| 2720 | if (tee_ret.func == FFA_ERROR_32) { |
| 2721 | dlog_verbose("Got error %d from EL3.\n", tee_ret.arg2); |
| 2722 | return tee_ret; |
| 2723 | } |
| 2724 | if (tee_ret.func != FFA_MEM_RETRIEVE_RESP_32) { |
| 2725 | dlog_verbose( |
| 2726 | "Got %#x from EL3, expected FFA_MEM_RETRIEVE_RESP.\n", |
| 2727 | tee_ret.func); |
| 2728 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2729 | } |
| 2730 | |
| 2731 | length = tee_ret.arg1; |
| 2732 | fragment_length = tee_ret.arg2; |
| 2733 | |
| 2734 | if (fragment_length > HF_MAILBOX_SIZE || fragment_length > length || |
| 2735 | length > sizeof(tee_retrieve_buffer)) { |
| 2736 | dlog_verbose("Invalid fragment length %d/%d (max %d/%d).\n", |
| 2737 | fragment_length, length, HF_MAILBOX_SIZE, |
| 2738 | sizeof(tee_retrieve_buffer)); |
| 2739 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2740 | } |
| 2741 | |
| 2742 | /* |
| 2743 | * Copy the first fragment of the memory region descriptor to an |
| 2744 | * internal buffer. |
| 2745 | */ |
| 2746 | memcpy_s(tee_retrieve_buffer, sizeof(tee_retrieve_buffer), |
| 2747 | from_locked.vm->mailbox.send, fragment_length); |
| 2748 | |
| 2749 | /* Fetch the remaining fragments into the same buffer. */ |
| 2750 | fragment_offset = fragment_length; |
| 2751 | while (fragment_offset < length) { |
Olivier Deprez | 112d2b5 | 2020-09-30 07:39:23 +0200 | [diff] [blame] | 2752 | tee_ret = arch_other_world_call( |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2753 | (struct ffa_value){.func = FFA_MEM_FRAG_RX_32, |
| 2754 | .arg1 = (uint32_t)handle, |
| 2755 | .arg2 = (uint32_t)(handle >> 32), |
| 2756 | .arg3 = fragment_offset}); |
| 2757 | if (tee_ret.func != FFA_MEM_FRAG_TX_32) { |
| 2758 | dlog_verbose( |
| 2759 | "Got %#x (%d) from TEE in response to " |
| 2760 | "FFA_MEM_FRAG_RX, expected FFA_MEM_FRAG_TX.\n", |
| 2761 | tee_ret.func, tee_ret.arg2); |
| 2762 | return tee_ret; |
| 2763 | } |
| 2764 | if (ffa_frag_handle(tee_ret) != handle) { |
| 2765 | dlog_verbose( |
| 2766 | "Got FFA_MEM_FRAG_TX for unexpected handle %#x " |
| 2767 | "in response to FFA_MEM_FRAG_RX for handle " |
| 2768 | "%#x.\n", |
| 2769 | ffa_frag_handle(tee_ret), handle); |
| 2770 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2771 | } |
| 2772 | if (ffa_frag_sender(tee_ret) != 0) { |
| 2773 | dlog_verbose( |
| 2774 | "Got FFA_MEM_FRAG_TX with unexpected sender %d " |
| 2775 | "(expected 0).\n", |
| 2776 | ffa_frag_sender(tee_ret)); |
| 2777 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2778 | } |
| 2779 | fragment_length = tee_ret.arg3; |
| 2780 | if (fragment_length > HF_MAILBOX_SIZE || |
| 2781 | fragment_offset + fragment_length > length) { |
| 2782 | dlog_verbose( |
| 2783 | "Invalid fragment length %d at offset %d (max " |
| 2784 | "%d).\n", |
| 2785 | fragment_length, fragment_offset, |
| 2786 | HF_MAILBOX_SIZE); |
| 2787 | return ffa_error(FFA_INVALID_PARAMETERS); |
| 2788 | } |
| 2789 | memcpy_s(tee_retrieve_buffer + fragment_offset, |
| 2790 | sizeof(tee_retrieve_buffer) - fragment_offset, |
| 2791 | from_locked.vm->mailbox.send, fragment_length); |
| 2792 | |
| 2793 | fragment_offset += fragment_length; |
| 2794 | } |
| 2795 | |
| 2796 | memory_region = (struct ffa_memory_region *)tee_retrieve_buffer; |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2797 | |
| 2798 | if (memory_region->receiver_count != 1) { |
| 2799 | /* Only one receiver supported by Hafnium for now. */ |
| 2800 | dlog_verbose( |
| 2801 | "Multiple recipients not supported (got %d, expected " |
| 2802 | "1).\n", |
| 2803 | memory_region->receiver_count); |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2804 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2805 | } |
| 2806 | |
| 2807 | if (memory_region->handle != handle) { |
| 2808 | dlog_verbose( |
| 2809 | "Got memory region handle %#x from TEE but requested " |
| 2810 | "handle %#x.\n", |
| 2811 | memory_region->handle, handle); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2812 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2813 | } |
| 2814 | |
| 2815 | /* The original sender must match the caller. */ |
| 2816 | if (to_locked.vm->id != memory_region->sender) { |
| 2817 | dlog_verbose( |
Olivier Deprez | f92e5d4 | 2020-11-13 16:00:54 +0100 | [diff] [blame] | 2818 | "VM %#x attempted to reclaim memory handle %#x " |
| 2819 | "originally sent by VM %#x.\n", |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2820 | to_locked.vm->id, handle, memory_region->sender); |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2821 | return ffa_error(FFA_INVALID_PARAMETERS); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2822 | } |
| 2823 | |
Andrew Walbran | b5ab43c | 2020-04-30 11:32:54 +0100 | [diff] [blame] | 2824 | composite = ffa_memory_region_get_composite(memory_region, 0); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2825 | |
| 2826 | /* |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2827 | * Validate that the reclaim transition is allowed for the given memory |
| 2828 | * region, forward the request to the TEE and then map the memory back |
| 2829 | * into the caller's stage-2 page table. |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2830 | */ |
Andrew Walbran | 996d1d1 | 2020-05-27 14:08:43 +0100 | [diff] [blame] | 2831 | return ffa_tee_reclaim_check_update( |
| 2832 | to_locked, handle, composite->constituents, |
Andrew Walbran | ca808b1 | 2020-05-15 17:22:28 +0100 | [diff] [blame] | 2833 | composite->constituent_count, memory_to_attributes, |
| 2834 | flags & FFA_MEM_RECLAIM_CLEAR, page_pool); |
Andrew Walbran | 290b0c9 | 2020-02-03 16:37:14 +0000 | [diff] [blame] | 2835 | } |