hw/acpi/hmat.c

   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 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 "sysemu/numa.h"
  30 #include "hw/acpi/hmat.h"
  31
  32 /*
  33  * ACPI 6.3:
  34  * 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145
  35  */
  36 static void build_hmat_mpda(GArray *table_data, uint16_t flags,
  37                             uint32_t initiator, uint32_t mem_node)
  38 {
  39
  40     /* Memory Proximity Domain Attributes Structure */
  41     /* Type */
  42     build_append_int_noprefix(table_data, 0, 2);
  43     /* Reserved */
  44     build_append_int_noprefix(table_data, 0, 2);
  45     /* Length */
  46     build_append_int_noprefix(table_data, 40, 4);
  47     /* Flags */
  48     build_append_int_noprefix(table_data, flags, 2);
  49     /* Reserved */
  50     build_append_int_noprefix(table_data, 0, 2);
  51     /* Proximity Domain for the Attached Initiator */
  52     build_append_int_noprefix(table_data, initiator, 4);
  53     /* Proximity Domain for the Memory */
  54     build_append_int_noprefix(table_data, mem_node, 4);
  55     /* Reserved */
  56     build_append_int_noprefix(table_data, 0, 4);
  57     /*
  58      * Reserved:
  59      * Previously defined as the Start Address of the System Physical
  60      * Address Range. Deprecated since ACPI Spec 6.3.
  61      */
  62     build_append_int_noprefix(table_data, 0, 8);
  63     /*
  64      * Reserved:
  65      * Previously defined as the Range Length of the region in bytes.
  66      * Deprecated since ACPI Spec 6.3.
  67      */
  68     build_append_int_noprefix(table_data, 0, 8);
  69 }
  70
  71 /*
  72  * ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
  73  * Structure: Table 5-146
  74  */
  75 static void build_hmat_lb(GArray *table_data, HMAT_LB_Info *hmat_lb,
  76                           uint32_t num_initiator, uint32_t num_target,
  77                           uint32_t *initiator_list)
  78 {
  79     int i, index;
  80     HMAT_LB_Data *lb_data;
  81     uint16_t *entry_list;
  82     uint32_t base;
  83     /* Length in bytes for entire structure */
  84     uint32_t lb_length
  85         = 32 /* Table length upto and including Entry Base Unit */
  86         + 4 * num_initiator /* Initiator Proximity Domain List */
  87         + 4 * num_target /* Target Proximity Domain List */
  88         + 2 * num_initiator * num_target; /* Latency or Bandwidth Entries */
  89
  90     /* Type */
  91     build_append_int_noprefix(table_data, 1, 2);
  92     /* Reserved */
  93     build_append_int_noprefix(table_data, 0, 2);
  94     /* Length */
  95     build_append_int_noprefix(table_data, lb_length, 4);
  96     /* Flags: Bits [3:0] Memory Hierarchy, Bits[7:4] Reserved */
  97     assert(!(hmat_lb->hierarchy >> 4));
  98     build_append_int_noprefix(table_data, hmat_lb->hierarchy, 1);
  99     /* Data Type */
 100     build_append_int_noprefix(table_data, hmat_lb->data_type, 1);
 101     /* Reserved */
 102     build_append_int_noprefix(table_data, 0, 2);
 103     /* Number of Initiator Proximity Domains (s) */
 104     build_append_int_noprefix(table_data, num_initiator, 4);
 105     /* Number of Target Proximity Domains (t) */
 106     build_append_int_noprefix(table_data, num_target, 4);
 107     /* Reserved */
 108     build_append_int_noprefix(table_data, 0, 4);
 109
 110     /* Entry Base Unit */
 111     if (hmat_lb->data_type <= HMAT_LB_DATA_WRITE_LATENCY) {
 112         /* Convert latency base from nanoseconds to picosecond */
 113         base = hmat_lb->base * 1000;
 114     } else {
 115         /* Convert bandwidth base from Byte to Megabyte */
 116         base = hmat_lb->base / MiB;
 117     }
 118     build_append_int_noprefix(table_data, base, 8);
 119
 120     /* Initiator Proximity Domain List */
 121     for (i = 0; i < num_initiator; i++) {
 122         build_append_int_noprefix(table_data, initiator_list[i], 4);
 123     }
 124
 125     /* Target Proximity Domain List */
 126     for (i = 0; i < num_target; i++) {
 127         build_append_int_noprefix(table_data, i, 4);
 128     }
 129
 130     /* Latency or Bandwidth Entries */
 131     entry_list = g_malloc0(num_initiator * num_target * sizeof(uint16_t));
 132     for (i = 0; i < hmat_lb->list->len; i++) {
 133         lb_data = &g_array_index(hmat_lb->list, HMAT_LB_Data, i);
 134         index = lb_data->initiator * num_target + lb_data->target;
 135
 136         entry_list[index] = (uint16_t)(lb_data->data / hmat_lb->base);
 137     }
 138
 139     for (i = 0; i < num_initiator * num_target; i++) {
 140         build_append_int_noprefix(table_data, entry_list[i], 2);
 141     }
 142
 143     g_free(entry_list);
 144 }
 145
 146 /* ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure: Table 5-147 */
 147 static void build_hmat_cache(GArray *table_data, uint8_t total_levels,
 148                              NumaHmatCacheOptions *hmat_cache)
 149 {
 150     /*
 151      * Cache Attributes: Bits [3:0] – Total Cache Levels
 152      * for this Memory Proximity Domain
 153      */
 154     uint32_t cache_attr = total_levels;
 155
 156     /* Bits [7:4] : Cache Level described in this structure */
 157     cache_attr |= (uint32_t) hmat_cache->level << 4;
 158
 159     /* Bits [11:8] - Cache Associativity */
 160     cache_attr |= (uint32_t) hmat_cache->associativity << 8;
 161
 162     /* Bits [15:12] - Write Policy */
 163     cache_attr |= (uint32_t) hmat_cache->policy << 12;
 164
 165     /* Bits [31:16] - Cache Line size in bytes */
 166     cache_attr |= (uint32_t) hmat_cache->line << 16;
 167
 168     /* Type */
 169     build_append_int_noprefix(table_data, 2, 2);
 170     /* Reserved */
 171     build_append_int_noprefix(table_data, 0, 2);
 172     /* Length */
 173     build_append_int_noprefix(table_data, 32, 4);
 174     /* Proximity Domain for the Memory */
 175     build_append_int_noprefix(table_data, hmat_cache->node_id, 4);
 176     /* Reserved */
 177     build_append_int_noprefix(table_data, 0, 4);
 178     /* Memory Side Cache Size */
 179     build_append_int_noprefix(table_data, hmat_cache->size, 8);
 180     /* Cache Attributes */
 181     build_append_int_noprefix(table_data, cache_attr, 4);
 182     /* Reserved */
 183     build_append_int_noprefix(table_data, 0, 2);
 184     /*
 185      * Number of SMBIOS handles (n)
 186      * Linux kernel uses Memory Side Cache Information Structure
 187      * without SMBIOS entries for now, so set Number of SMBIOS handles
 188      * as 0.
 189      */
 190     build_append_int_noprefix(table_data, 0, 2);
 191 }
 192
 193 /* Build HMAT sub table structures */
 194 static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
 195 {
 196     uint16_t flags;
 197     uint32_t num_initiator = 0;
 198     uint32_t initiator_list[MAX_NODES];
 199     int i, hierarchy, type, cache_level, total_levels;
 200     HMAT_LB_Info *hmat_lb;
 201     NumaHmatCacheOptions *hmat_cache;
 202
 203     for (i = 0; i < numa_state->num_nodes; i++) {
 204         flags = 0;
 205
 206         if (numa_state->nodes[i].initiator < MAX_NODES) {
 207             flags |= HMAT_PROXIMITY_INITIATOR_VALID;
 208         }
 209
 210         build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i);
 211     }
 212
 213     for (i = 0; i < numa_state->num_nodes; i++) {
 214         if (numa_state->nodes[i].has_cpu) {
 215             initiator_list[num_initiator++] = i;
 216         }
 217     }
 218
 219     /*
 220      * ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
 221      * Structure: Table 5-146
 222      */
 223     for (hierarchy = HMAT_LB_MEM_MEMORY;
 224          hierarchy <= HMAT_LB_MEM_CACHE_3RD_LEVEL; hierarchy++) {
 225         for (type = HMAT_LB_DATA_ACCESS_LATENCY;
 226              type <= HMAT_LB_DATA_WRITE_BANDWIDTH; type++) {
 227             hmat_lb = numa_state->hmat_lb[hierarchy][type];
 228
 229             if (hmat_lb && hmat_lb->list->len) {
 230                 build_hmat_lb(table_data, hmat_lb, num_initiator,
 231                               numa_state->num_nodes, initiator_list);
 232             }
 233         }
 234     }
 235
 236     /*
 237      * ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure:
 238      * Table 5-147
 239      */
 240     for (i = 0; i < numa_state->num_nodes; i++) {
 241         total_levels = 0;
 242         for (cache_level = 1; cache_level < HMAT_LB_LEVELS; cache_level++) {
 243             if (numa_state->hmat_cache[i][cache_level]) {
 244                 total_levels++;
 245             }
 246         }
 247         for (cache_level = 0; cache_level <= total_levels; cache_level++) {
 248             hmat_cache = numa_state->hmat_cache[i][cache_level];
 249             if (hmat_cache) {
 250                 build_hmat_cache(table_data, total_levels, hmat_cache);
 251             }
 252         }
 253     }
 254 }
 255
 256 void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state)
 257 {
 258     int hmat_start = table_data->len;
 259
 260     /* reserve space for HMAT header  */
 261     acpi_data_push(table_data, 40);
 262
 263     hmat_build_table_structs(table_data, numa_state);
 264
 265     build_header(linker, table_data,
 266                  (void *)(table_data->data + hmat_start),
 267                  "HMAT", table_data->len - hmat_start, 2, NULL, NULL);
 268 }