| 1 | /* |
| 2 | * HMAT ACPI Implementation |
| 3 | * |
| 4 | * Copyright(C) 2019 Intel Corporation. |
| 5 | * |
| 6 | * Author: |
| 7 | * Liu jingqi <jingqi.liu@linux.intel.com> |
| 8 | * Tao Xu <tao3.xu@intel.com> |
| 9 | * |
| 10 | * HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table |
| 11 | * (HMAT) |
| 12 | * |
| 13 | * This library is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU Lesser General Public |
| 15 | * License as published by the Free Software Foundation; either |
| 16 | * version 2.1 of the License, or (at your option) any later version. |
| 17 | * |
| 18 | * This library is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | * Lesser General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU Lesser General Public |
| 24 | * License along with this library; if not, see <http://www.gnu.org/licenses/> |
| 25 | */ |
| 26 | |
| 27 | #include "qemu/osdep.h" |
| 28 | #include "qemu/units.h" |
| 29 | #include "system/numa.h" |
| 30 | #include "hw/acpi/aml-build.h" |
| 31 | #include "hw/acpi/hmat.h" |
| 32 | |
| 33 | /* |
| 34 | * ACPI 6.3: |
| 35 | * 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145 |
| 36 | */ |
| 37 | static void build_hmat_mpda(GArray *table_data, uint16_t flags, |
| 38 | uint32_t initiator, uint32_t mem_node) |
| 39 | { |
| 40 | |
| 41 | /* Memory Proximity Domain Attributes Structure */ |
| 42 | /* Type */ |
| 43 | build_append_int_noprefix(table_data, 0, 2); |
| 44 | /* Reserved */ |
| 45 | build_append_int_noprefix(table_data, 0, 2); |
| 46 | /* Length */ |
| 47 | build_append_int_noprefix(table_data, 40, 4); |
| 48 | /* Flags */ |
| 49 | build_append_int_noprefix(table_data, flags, 2); |
| 50 | /* Reserved */ |
| 51 | build_append_int_noprefix(table_data, 0, 2); |
| 52 | /* Proximity Domain for the Attached Initiator */ |
| 53 | build_append_int_noprefix(table_data, initiator, 4); |
| 54 | /* Proximity Domain for the Memory */ |
| 55 | build_append_int_noprefix(table_data, mem_node, 4); |
| 56 | /* Reserved */ |
| 57 | build_append_int_noprefix(table_data, 0, 4); |
| 58 | /* |
| 59 | * Reserved: |
| 60 | * Previously defined as the Start Address of the System Physical |
| 61 | * Address Range. Deprecated since ACPI Spec 6.3. |
| 62 | */ |
| 63 | build_append_int_noprefix(table_data, 0, 8); |
| 64 | /* |
| 65 | * Reserved: |
| 66 | * Previously defined as the Range Length of the region in bytes. |
| 67 | * Deprecated since ACPI Spec 6.3. |
| 68 | */ |
| 69 | build_append_int_noprefix(table_data, 0, 8); |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information |
| 74 | * Structure: Table 5-146 |
| 75 | */ |
| 76 | static void build_hmat_lb(GArray *table_data, HMAT_LB_Info *hmat_lb, |
| 77 | uint32_t num_initiator, uint32_t num_target, |
| 78 | uint32_t *initiator_list) |
| 79 | { |
| 80 | int i, index; |
| 81 | uint32_t initiator_to_index[MAX_NODES] = {}; |
| 82 | HMAT_LB_Data *lb_data; |
| 83 | uint16_t *entry_list; |
| 84 | uint32_t base; |
| 85 | /* Length in bytes for entire structure */ |
| 86 | uint32_t lb_length |
| 87 | = 32 /* Table length up to and including Entry Base Unit */ |
| 88 | + 4 * num_initiator /* Initiator Proximity Domain List */ |
| 89 | + 4 * num_target /* Target Proximity Domain List */ |
| 90 | + 2 * num_initiator * num_target; /* Latency or Bandwidth Entries */ |
| 91 | |
| 92 | /* Type */ |
| 93 | build_append_int_noprefix(table_data, 1, 2); |
| 94 | /* Reserved */ |
| 95 | build_append_int_noprefix(table_data, 0, 2); |
| 96 | /* Length */ |
| 97 | build_append_int_noprefix(table_data, lb_length, 4); |
| 98 | /* Flags: Bits [3:0] Memory Hierarchy, Bits[7:4] Reserved */ |
| 99 | assert(!(hmat_lb->hierarchy >> 4)); |
| 100 | build_append_int_noprefix(table_data, hmat_lb->hierarchy, 1); |
| 101 | /* Data Type */ |
| 102 | build_append_int_noprefix(table_data, hmat_lb->data_type, 1); |
| 103 | /* Reserved */ |
| 104 | build_append_int_noprefix(table_data, 0, 2); |
| 105 | /* Number of Initiator Proximity Domains (s) */ |
| 106 | build_append_int_noprefix(table_data, num_initiator, 4); |
| 107 | /* Number of Target Proximity Domains (t) */ |
| 108 | build_append_int_noprefix(table_data, num_target, 4); |
| 109 | /* Reserved */ |
| 110 | build_append_int_noprefix(table_data, 0, 4); |
| 111 | |
| 112 | /* Entry Base Unit */ |
| 113 | if (hmat_lb->data_type <= HMAT_LB_DATA_WRITE_LATENCY) { |
| 114 | /* Convert latency base from nanoseconds to picosecond */ |
| 115 | base = hmat_lb->base * 1000; |
| 116 | } else { |
| 117 | /* Convert bandwidth base from Byte to Megabyte */ |
| 118 | base = hmat_lb->base / MiB; |
| 119 | } |
| 120 | build_append_int_noprefix(table_data, base, 8); |
| 121 | |
| 122 | /* Initiator Proximity Domain List */ |
| 123 | for (i = 0; i < num_initiator; i++) { |
| 124 | build_append_int_noprefix(table_data, initiator_list[i], 4); |
| 125 | /* Reverse mapping for array possitions */ |
| 126 | initiator_to_index[initiator_list[i]] = i; |
| 127 | } |
| 128 | |
| 129 | /* Target Proximity Domain List */ |
| 130 | for (i = 0; i < num_target; i++) { |
| 131 | build_append_int_noprefix(table_data, i, 4); |
| 132 | } |
| 133 | |
| 134 | /* Latency or Bandwidth Entries */ |
| 135 | entry_list = g_new0(uint16_t, num_initiator * num_target); |
| 136 | for (i = 0; i < hmat_lb->list->len; i++) { |
| 137 | lb_data = &g_array_index(hmat_lb->list, HMAT_LB_Data, i); |
| 138 | index = initiator_to_index[lb_data->initiator] * num_target + |
| 139 | lb_data->target; |
| 140 | |
| 141 | entry_list[index] = (uint16_t)(lb_data->data / hmat_lb->base); |
| 142 | } |
| 143 | |
| 144 | for (i = 0; i < num_initiator * num_target; i++) { |
| 145 | build_append_int_noprefix(table_data, entry_list[i], 2); |
| 146 | } |
| 147 | |
| 148 | g_free(entry_list); |
| 149 | } |
| 150 | |
| 151 | /* ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure: Table 5-147 */ |
| 152 | static void build_hmat_cache(GArray *table_data, uint8_t total_levels, |
| 153 | NumaHmatCacheOptions *hmat_cache) |
| 154 | { |
| 155 | /* |
| 156 | * Cache Attributes: Bits [3:0] – Total Cache Levels |
| 157 | * for this Memory Proximity Domain |
| 158 | */ |
| 159 | uint32_t cache_attr = total_levels; |
| 160 | |
| 161 | /* Bits [7:4] : Cache Level described in this structure */ |
| 162 | cache_attr |= (uint32_t) hmat_cache->level << 4; |
| 163 | |
| 164 | /* Bits [11:8] - Cache Associativity */ |
| 165 | cache_attr |= (uint32_t) hmat_cache->associativity << 8; |
| 166 | |
| 167 | /* Bits [15:12] - Write Policy */ |
| 168 | cache_attr |= (uint32_t) hmat_cache->policy << 12; |
| 169 | |
| 170 | /* Bits [31:16] - Cache Line size in bytes */ |
| 171 | cache_attr |= (uint32_t) hmat_cache->line << 16; |
| 172 | |
| 173 | /* Type */ |
| 174 | build_append_int_noprefix(table_data, 2, 2); |
| 175 | /* Reserved */ |
| 176 | build_append_int_noprefix(table_data, 0, 2); |
| 177 | /* Length */ |
| 178 | build_append_int_noprefix(table_data, 32, 4); |
| 179 | /* Proximity Domain for the Memory */ |
| 180 | build_append_int_noprefix(table_data, hmat_cache->node_id, 4); |
| 181 | /* Reserved */ |
| 182 | build_append_int_noprefix(table_data, 0, 4); |
| 183 | /* Memory Side Cache Size */ |
| 184 | build_append_int_noprefix(table_data, hmat_cache->size, 8); |
| 185 | /* Cache Attributes */ |
| 186 | build_append_int_noprefix(table_data, cache_attr, 4); |
| 187 | /* Reserved */ |
| 188 | build_append_int_noprefix(table_data, 0, 2); |
| 189 | /* |
| 190 | * Number of SMBIOS handles (n) |
| 191 | * Linux kernel uses Memory Side Cache Information Structure |
| 192 | * without SMBIOS entries for now, so set Number of SMBIOS handles |
| 193 | * as 0. |
| 194 | */ |
| 195 | build_append_int_noprefix(table_data, 0, 2); |
| 196 | } |
| 197 | |
| 198 | /* Build HMAT sub table structures */ |
| 199 | static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state) |
| 200 | { |
| 201 | uint16_t flags; |
| 202 | uint32_t num_initiator = 0; |
| 203 | uint32_t initiator_list[MAX_NODES]; |
| 204 | int i, hierarchy, type, cache_level, total_levels; |
| 205 | HMAT_LB_Info *hmat_lb; |
| 206 | NumaHmatCacheOptions *hmat_cache; |
| 207 | |
| 208 | build_append_int_noprefix(table_data, 0, 4); /* Reserved */ |
| 209 | |
| 210 | for (i = 0; i < numa_state->num_nodes; i++) { |
| 211 | /* |
| 212 | * Linux rejects whole HMAT table if a node with no memory |
| 213 | * has one of these structures listing it as a target. |
| 214 | */ |
| 215 | if (!numa_state->nodes[i].node_mem) { |
| 216 | continue; |
| 217 | } |
| 218 | flags = 0; |
| 219 | |
| 220 | if (numa_state->nodes[i].initiator < MAX_NODES) { |
| 221 | flags |= HMAT_PROXIMITY_INITIATOR_VALID; |
| 222 | } |
| 223 | |
| 224 | build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i); |
| 225 | } |
| 226 | |
| 227 | for (i = 0; i < numa_state->num_nodes; i++) { |
| 228 | if (numa_state->nodes[i].has_cpu || numa_state->nodes[i].has_gi) { |
| 229 | initiator_list[num_initiator++] = i; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information |
| 235 | * Structure: Table 5-146 |
| 236 | */ |
| 237 | for (hierarchy = HMAT_LB_MEM_MEMORY; |
| 238 | hierarchy <= HMAT_LB_MEM_CACHE_3RD_LEVEL; hierarchy++) { |
| 239 | for (type = HMAT_LB_DATA_ACCESS_LATENCY; |
| 240 | type <= HMAT_LB_DATA_WRITE_BANDWIDTH; type++) { |
| 241 | hmat_lb = numa_state->hmat_lb[hierarchy][type]; |
| 242 | |
| 243 | if (hmat_lb && hmat_lb->list->len) { |
| 244 | build_hmat_lb(table_data, hmat_lb, num_initiator, |
| 245 | numa_state->num_nodes, initiator_list); |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure: |
| 252 | * Table 5-147 |
| 253 | */ |
| 254 | for (i = 0; i < numa_state->num_nodes; i++) { |
| 255 | total_levels = 0; |
| 256 | for (cache_level = 1; cache_level < HMAT_LB_LEVELS; cache_level++) { |
| 257 | if (numa_state->hmat_cache[i][cache_level]) { |
| 258 | total_levels++; |
| 259 | } |
| 260 | } |
| 261 | for (cache_level = 0; cache_level <= total_levels; cache_level++) { |
| 262 | hmat_cache = numa_state->hmat_cache[i][cache_level]; |
| 263 | if (hmat_cache) { |
| 264 | build_hmat_cache(table_data, total_levels, hmat_cache); |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state, |
| 271 | const char *oem_id, const char *oem_table_id) |
| 272 | { |
| 273 | AcpiTable table = { .sig = "HMAT", .rev = 2, |
| 274 | .oem_id = oem_id, .oem_table_id = oem_table_id }; |
| 275 | |
| 276 | acpi_table_begin(&table, table_data); |
| 277 | hmat_build_table_structs(table_data, numa_state); |
| 278 | acpi_table_end(linker, &table); |
| 279 | } |