From: Zhuocheng Ding <zhuocheng.ding@intel.com>
Support module level in i386 cpu topology structure "X86CPUTopoInfo".
Before updating APIC ID parsing rule with module level, the
apicid_core_width() temporarily combines the core and module levels
together.
At present, we don't expose module level in CPUID.1FH because currently
linux (v6.2-rc6) doesn't support module level. And exposing module and
die levels at the same time in CPUID.1FH will cause linux to calculate
the wrong die_id. The module level should be exposed until the real
machine has the module level in CPUID.1FH.
In addition, update topology structure in test-x86-apicid.c.
Signed-off-by: Zhuocheng Ding <zhuocheng.ding@intel.com>
Co-developed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
hw/i386/x86.c | 3 ++-
include/hw/i386/topology.h | 13 ++++++++---
target/i386/cpu.c | 17 ++++++++------
tests/unit/test-x86-apicid.c | 45 +++++++++++++++++++-----------------
4 files changed, 46 insertions(+), 32 deletions(-)
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index ae1bb562d6e2..1c069ff56ae7 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -71,7 +71,8 @@ inline void init_topo_info(X86CPUTopoInfo *topo_info,
MachineState *ms = MACHINE(x86ms);
topo_info->dies_per_pkg = ms->smp.dies;
- topo_info->cores_per_die = ms->smp.cores;
+ topo_info->modules_per_die = ms->smp.clusters;
+ topo_info->cores_per_module = ms->smp.cores;
topo_info->threads_per_core = ms->smp.threads;
}
diff --git a/include/hw/i386/topology.h b/include/hw/i386/topology.h
index 81573f6cfde0..bbb00dc4aad8 100644
--- a/include/hw/i386/topology.h
+++ b/include/hw/i386/topology.h
@@ -54,7 +54,8 @@ typedef struct X86CPUTopoIDs {
typedef struct X86CPUTopoInfo {
unsigned dies_per_pkg;
- unsigned cores_per_die;
+ unsigned modules_per_die;
+ unsigned cores_per_module;
unsigned threads_per_core;
} X86CPUTopoInfo;
@@ -78,7 +79,12 @@ static inline unsigned apicid_smt_width(X86CPUTopoInfo *topo_info)
*/
static inline unsigned apicid_core_width(X86CPUTopoInfo *topo_info)
{
- return apicid_bitwidth_for_count(topo_info->cores_per_die);
+ /*
+ * TODO: Will separate module info from core_width when update
+ * APIC ID with module level.
+ */
+ return apicid_bitwidth_for_count(topo_info->cores_per_module *
+ topo_info->modules_per_die);
}
/* Bit width of the Die_ID field */
@@ -128,7 +134,8 @@ static inline void x86_topo_ids_from_idx(X86CPUTopoInfo
*topo_info,
X86CPUTopoIDs *topo_ids)
{
unsigned nr_dies = topo_info->dies_per_pkg;
- unsigned nr_cores = topo_info->cores_per_die;
+ unsigned nr_cores = topo_info->cores_per_module *
+ topo_info->modules_per_die;
unsigned nr_threads = topo_info->threads_per_core;
topo_ids->pkg_id = cpu_index / (nr_dies * nr_cores * nr_threads);
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 61ec9a7499b8..6f3d114c7d12 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -336,7 +336,9 @@ static void encode_cache_cpuid8000001d(CPUCacheInfo *cache,
/* L3 is shared among multiple cores */
if (cache->level == 3) {
- l3_threads = topo_info->cores_per_die * topo_info->threads_per_core;
+ l3_threads = topo_info->modules_per_die *
+ topo_info->cores_per_module *
+ topo_info->threads_per_core;
*eax |= (l3_threads - 1) << 14;
} else {
*eax |= ((topo_info->threads_per_core - 1) << 14);
@@ -5218,11 +5220,12 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
uint32_t cpus_per_pkg;
topo_info.dies_per_pkg = env->nr_dies;
- topo_info.cores_per_die = cs->nr_cores / env->nr_dies;
+ topo_info.modules_per_die = env->nr_modules;
+ topo_info.cores_per_module = cs->nr_cores / env->nr_dies / env->nr_modules;
topo_info.threads_per_core = cs->nr_threads;
- cpus_per_pkg = topo_info.dies_per_pkg * topo_info.cores_per_die *
- topo_info.threads_per_core;
+ cpus_per_pkg = topo_info.dies_per_pkg * topo_info.modules_per_die *
+ topo_info.cores_per_module * topo_info.threads_per_core;
/* Calculate & apply limits for different index ranges */
if (index >= 0xC0000000) {
@@ -5298,8 +5301,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
if (*eax & 31) {
int host_vcpus_per_cache = 1 + ((*eax & 0x3FFC000) >> 14);
int vcpus_per_socket = cpus_per_pkg;
- int cores_per_socket = topo_info.cores_per_die *
- topo_info.dies_per_pkg;
+ int cores_per_socket = cpus_per_pkg /
+ topo_info.threads_per_core;
if (cores_per_socket > 1) {
*eax &= ~0xFC000000;
*eax |= (pow2ceil(cores_per_socket) - 1) << 26;
@@ -5483,7 +5486,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
break;
case 1:
*eax = apicid_die_offset(&topo_info);
- *ebx = topo_info.cores_per_die * topo_info.threads_per_core;
+ *ebx = cpus_per_pkg / topo_info.dies_per_pkg;
*ecx |= CPUID_TOPOLOGY_LEVEL_CORE;
break;
case 2:
diff --git a/tests/unit/test-x86-apicid.c b/tests/unit/test-x86-apicid.c
index 2b104f86d7c2..f21b8a5d95c2 100644
--- a/tests/unit/test-x86-apicid.c
+++ b/tests/unit/test-x86-apicid.c
@@ -30,13 +30,16 @@ static void test_topo_bits(void)
{
X86CPUTopoInfo topo_info = {0};
- /* simple tests for 1 thread per core, 1 core per die, 1 die per package */
- topo_info = (X86CPUTopoInfo) {1, 1, 1};
+ /*
+ * simple tests for 1 thread per core, 1 core per module,
+ * 1 module per die, 1 die per package
+ */
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 1};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 0);
g_assert_cmpuint(apicid_core_width(&topo_info), ==, 0);
g_assert_cmpuint(apicid_die_width(&topo_info), ==, 0);
- topo_info = (X86CPUTopoInfo) {1, 1, 1};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 1};
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 0), ==, 0);
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1), ==, 1);
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2), ==, 2);
@@ -45,39 +48,39 @@ static void test_topo_bits(void)
/* Test field width calculation for multiple values
*/
- topo_info = (X86CPUTopoInfo) {1, 1, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 2};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 1);
- topo_info = (X86CPUTopoInfo) {1, 1, 3};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 3};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
- topo_info = (X86CPUTopoInfo) {1, 1, 4};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 4};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
- topo_info = (X86CPUTopoInfo) {1, 1, 14};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 14};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
- topo_info = (X86CPUTopoInfo) {1, 1, 15};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 15};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
- topo_info = (X86CPUTopoInfo) {1, 1, 16};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 16};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
- topo_info = (X86CPUTopoInfo) {1, 1, 17};
+ topo_info = (X86CPUTopoInfo) {1, 1, 1, 17};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 5);
- topo_info = (X86CPUTopoInfo) {1, 30, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 30, 2};
g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
- topo_info = (X86CPUTopoInfo) {1, 31, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 31, 2};
g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
- topo_info = (X86CPUTopoInfo) {1, 32, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 32, 2};
g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
- topo_info = (X86CPUTopoInfo) {1, 33, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 33, 2};
g_assert_cmpuint(apicid_core_width(&topo_info), ==, 6);
- topo_info = (X86CPUTopoInfo) {1, 30, 2};
+ topo_info = (X86CPUTopoInfo) {1, 1, 30, 2};
g_assert_cmpuint(apicid_die_width(&topo_info), ==, 0);
- topo_info = (X86CPUTopoInfo) {2, 30, 2};
+ topo_info = (X86CPUTopoInfo) {2, 1, 30, 2};
g_assert_cmpuint(apicid_die_width(&topo_info), ==, 1);
- topo_info = (X86CPUTopoInfo) {3, 30, 2};
+ topo_info = (X86CPUTopoInfo) {3, 1, 30, 2};
g_assert_cmpuint(apicid_die_width(&topo_info), ==, 2);
- topo_info = (X86CPUTopoInfo) {4, 30, 2};
+ topo_info = (X86CPUTopoInfo) {4, 1, 30, 2};
g_assert_cmpuint(apicid_die_width(&topo_info), ==, 2);
/* build a weird topology and see if IDs are calculated correctly
@@ -85,18 +88,18 @@ static void test_topo_bits(void)
/* This will use 2 bits for thread ID and 3 bits for core ID
*/
- topo_info = (X86CPUTopoInfo) {1, 6, 3};
+ topo_info = (X86CPUTopoInfo) {1, 1, 6, 3};
g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
g_assert_cmpuint(apicid_core_offset(&topo_info), ==, 2);
g_assert_cmpuint(apicid_die_offset(&topo_info), ==, 5);
g_assert_cmpuint(apicid_pkg_offset(&topo_info), ==, 5);
- topo_info = (X86CPUTopoInfo) {1, 6, 3};
+ topo_info = (X86CPUTopoInfo) {1, 1, 6, 3};
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 0), ==, 0);
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1), ==, 1);
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2), ==, 2);
- topo_info = (X86CPUTopoInfo) {1, 6, 3};
+ topo_info = (X86CPUTopoInfo) {1, 1, 6, 3};
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1 * 3 + 0), ==,
(1 << 2) | 0);
g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1 * 3 + 1), ==,