OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

hmat acpi: Build System Locality Latency and Bandwidth Information Structure(s)

Browse Source 
This structure describes the memory access latency and bandwidth
information from various memory access initiator proximity domains.
The latency and bandwidth numbers represented in this structure
correspond to rated latency and bandwidth for the platform.
The software could use this information as hint for optimization.

Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Liu Jingqi <jingqi.liu@intel.com>
Signed-off-by: Tao Xu <tao3.xu@intel.com>
Message-Id: <20191213011929.2520-6-tao3.xu@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Liu Jingqi 2019-12-13 09:19:26 +08:00 committed by Michael S. Tsirkin
parent e6f123c3b8
commit 4586a2cb83
1 changed files with 103 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
hw/acpi/hmat.c
View File

@ -25,6 +25,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "sysemu/numa.h"
#include "hw/acpi/hmat.h"
@ -67,11 +68,89 @@ static void build_hmat_mpda(GArray *table_data, uint16_t flags,
build_append_int_noprefix(table_data, 0, 8);
}
/*
* ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
* Structure: Table 5-146
*/
static void build_hmat_lb(GArray *table_data, HMAT_LB_Info *hmat_lb,
uint32_t num_initiator, uint32_t num_target,
uint32_t *initiator_list)
{
int i, index;
HMAT_LB_Data *lb_data;
uint16_t *entry_list;
uint32_t base;
/* Length in bytes for entire structure */
uint32_t lb_length
= 32 /* Table length upto and including Entry Base Unit */
+ 4 * num_initiator /* Initiator Proximity Domain List */
+ 4 * num_target /* Target Proximity Domain List */
+ 2 * num_initiator * num_target; /* Latency or Bandwidth Entries */
/* Type */
build_append_int_noprefix(table_data, 1, 2);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Length */
build_append_int_noprefix(table_data, lb_length, 4);
/* Flags: Bits [3:0] Memory Hierarchy, Bits[7:4] Reserved */
assert(!(hmat_lb->hierarchy >> 4));
build_append_int_noprefix(table_data, hmat_lb->hierarchy, 1);
/* Data Type */
build_append_int_noprefix(table_data, hmat_lb->data_type, 1);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Number of Initiator Proximity Domains (s) */
build_append_int_noprefix(table_data, num_initiator, 4);
/* Number of Target Proximity Domains (t) */
build_append_int_noprefix(table_data, num_target, 4);
/* Reserved */
build_append_int_noprefix(table_data, 0, 4);
/* Entry Base Unit */
if (hmat_lb->data_type <= HMAT_LB_DATA_WRITE_LATENCY) {
/* Convert latency base from nanoseconds to picosecond */
base = hmat_lb->base * 1000;
} else {
/* Convert bandwidth base from Byte to Megabyte */
base = hmat_lb->base / MiB;
}
build_append_int_noprefix(table_data, base, 8);
/* Initiator Proximity Domain List */
for (i = 0; i < num_initiator; i++) {
build_append_int_noprefix(table_data, initiator_list[i], 4);
}
/* Target Proximity Domain List */
for (i = 0; i < num_target; i++) {
build_append_int_noprefix(table_data, i, 4);
}
/* Latency or Bandwidth Entries */
entry_list = g_malloc0(num_initiator * num_target * sizeof(uint16_t));
for (i = 0; i < hmat_lb->list->len; i++) {
lb_data = &g_array_index(hmat_lb->list, HMAT_LB_Data, i);
index = lb_data->initiator * num_target + lb_data->target;
entry_list[index] = (uint16_t)(lb_data->data / hmat_lb->base);
}
for (i = 0; i < num_initiator * num_target; i++) {
build_append_int_noprefix(table_data, entry_list[i], 2);
}
g_free(entry_list);
}
/* Build HMAT sub table structures */
static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
{
uint16_t flags;
int i;
uint32_t num_initiator = 0;
uint32_t initiator_list[MAX_NODES];
int i, hierarchy, type;
HMAT_LB_Info *hmat_lb;
for (i = 0; i < numa_state->num_nodes; i++) {
flags = 0;
@ -82,6 +161,29 @@ static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i);
}
for (i = 0; i < numa_state->num_nodes; i++) {
if (numa_state->nodes[i].has_cpu) {
initiator_list[num_initiator++] = i;
}
}
/*
* ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
* Structure: Table 5-146
*/
for (hierarchy = HMAT_LB_MEM_MEMORY;
hierarchy <= HMAT_LB_MEM_CACHE_3RD_LEVEL; hierarchy++) {
for (type = HMAT_LB_DATA_ACCESS_LATENCY;
type <= HMAT_LB_DATA_WRITE_BANDWIDTH; type++) {
hmat_lb = numa_state->hmat_lb[hierarchy][type];
if (hmat_lb && hmat_lb->list->len) {
build_hmat_lb(table_data, hmat_lb, num_initiator,
numa_state->num_nodes, initiator_list);
}
}
}
}
void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state)