From: Hendrik Wüthrich <whend...@google.com>
Add CPUID enumeration for intel RDT monitoring and allocation, as well
as the flags used in the enumeration code.
Signed-off-by: Hendrik Wüthrich <whend...@google.com>
---
hw/i386/rdt.c | 30 ++++++++++++++++++
include/hw/i386/rdt.h | 31 +++++++++++++++++++
target/i386/cpu.c | 71 +++++++++++++++++++++++++++++++++++++++++++
target/i386/cpu.h | 5 +++
4 files changed, 137 insertions(+)
diff --git a/hw/i386/rdt.c b/hw/i386/rdt.c
index 3a37341bd6..1409f9a904 100644
--- a/hw/i386/rdt.c
+++ b/hw/i386/rdt.c
@@ -35,6 +35,17 @@
#define RDT_MAX_L2_MASK_COUNT 63
#define RDT_MAX_MBA_THRTL_COUNT 63
+/* RDT L3 Allocation features */
+#define CPUID_10_1_EAX_CBM_LENGTH 0xf
+#define CPUID_10_1_EBX_CBM 0x0
+#define CPUID_10_1_ECX_CDP 0x0 // to enable, it would be (1U << 2)
+/* RDT L2 Allocation features*/
+#define CPUID_10_2_EAX_CBM_LENGTH 0xf
+#define CPUID_10_2_EBX_CBM 0x0
+/* RDT MBA features */
+#define CPUID_10_3_EAX_THRTL_MAX 89
+#define CPUID_10_3_ECX_LINEAR_RESPONSE (1U << 2)
+
#define TYPE_RDT "rdt"
#define RDT_NUM_RMID_PROP "rmids"
@@ -81,8 +92,27 @@ struct RDTState {
struct RDTStateClass {
};
+uint32_t rdt_get_cpuid_15_0_edx_l3(void) { return CPUID_15_1_EDX_L3_OCCUPANCY
| CPUID_15_1_EDX_L3_TOTAL_BW | CPUID_15_1_EDX_L3_LOCAL_BW; }
+
+uint32_t rdt_cpuid_15_1_edx_l3_total_bw_enabled(void) { return
CPUID_15_1_EDX_L3_TOTAL_BW; }
+uint32_t rdt_cpuid_15_1_edx_l3_local_bw_enabled(void) { return
CPUID_15_1_EDX_L3_LOCAL_BW; }
+uint32_t rdt_cpuid_15_1_edx_l3_occupancy_enabled(void) { return
CPUID_15_1_EDX_L3_OCCUPANCY; }
+
+uint32_t rdt_cpuid_10_0_ebx_l3_cat_enabled(void) { return
CPUID_10_0_EBX_L3_CAT; }
+uint32_t rdt_cpuid_10_0_ebx_l2_cat_enabled(void) { return
CPUID_10_0_EBX_L2_CAT; }
+uint32_t rdt_cpuid_10_0_ebx_l2_mba_enabled(void) { return CPUID_10_0_EBX_MBA; }
+
+uint32_t rdt_get_cpuid_10_1_eax_cbm_length(void) { return
CPUID_10_1_EAX_CBM_LENGTH; }
+uint32_t rdt_cpuid_10_1_ebx_cbm_enabled(void) { return CPUID_10_1_EBX_CBM; }
+uint32_t rdt_cpuid_10_1_ecx_cdp_enabled(void) { return CPUID_10_1_ECX_CDP; }
uint32_t rdt_get_cpuid_10_1_edx_cos_max(void) { return RDT_MAX_L3_MASK_COUNT; }
+
+uint32_t rdt_get_cpuid_10_2_eax_cbm_length(void) { return
CPUID_10_2_EAX_CBM_LENGTH; }
+uint32_t rdt_cpuid_10_2_ebx_cbm_enabled(void) { return CPUID_10_2_EBX_CBM; }
uint32_t rdt_get_cpuid_10_2_edx_cos_max(void) { return RDT_MAX_L2_MASK_COUNT; }
+
+uint32_t rdt_get_cpuid_10_3_eax_thrtl_max(void) { return
CPUID_10_3_EAX_THRTL_MAX; }
+uint32_t rdt_cpuid_10_3_eax_linear_response_enabled(void) { return
CPUID_10_3_ECX_LINEAR_RESPONSE; }
uint32_t rdt_get_cpuid_10_3_edx_cos_max(void) { return
RDT_MAX_MBA_THRTL_COUNT; }
bool rdt_associate_rmid_cos(uint64_t msr_ia32_pqr_assoc)
diff --git a/include/hw/i386/rdt.h b/include/hw/i386/rdt.h
index ec82a149f2..57d2fa5b77 100644
--- a/include/hw/i386/rdt.h
+++ b/include/hw/i386/rdt.h
@@ -20,13 +20,44 @@
#include <stdbool.h>
#include <stdint.h>
+/* RDT L3 Cache Monitoring Technology */
+#define CPUID_15_0_EDX_L3 (1U << 1)
+#define CPUID_15_1_EDX_L3_OCCUPANCY (1U << 0)
+#define CPUID_15_1_EDX_L3_TOTAL_BW (1U << 1)
+#define CPUID_15_1_EDX_L3_LOCAL_BW (1U << 2)
+
+/* RDT Cache Allocation Technology */
+#define CPUID_10_0_EBX_L3_CAT (1U << 1)
+#define CPUID_10_0_EBX_L2_CAT (1U << 2)
+#define CPUID_10_0_EBX_MBA (1U << 3)
+#define CPUID_10_0_EDX CPUID_10_0_EBX_L3_CAT | CPUID_10_0_EBX_L2_CAT |
CPUID_10_0_EBX_MBA
+
typedef struct RDTState RDTState;
typedef struct RDTStatePerCore RDTStatePerCore;
typedef struct RDTMonitor RDTMonitor;
typedef struct RDTAllocation RDTAllocation;
+uint32_t rdt_get_cpuid_15_0_edx_l3(void);
+
+uint32_t rdt_cpuid_15_1_edx_l3_total_bw_enabled(void);
+uint32_t rdt_cpuid_15_1_edx_l3_local_bw_enabled(void);
+uint32_t rdt_cpuid_15_1_edx_l3_occupancy_enabled(void);
+
+uint32_t rdt_cpuid_10_0_ebx_l3_cat_enabled(void);
+uint32_t rdt_cpuid_10_0_ebx_l2_cat_enabled(void);
+uint32_t rdt_cpuid_10_0_ebx_l2_mba_enabled(void);
+
+uint32_t rdt_get_cpuid_10_1_eax_cbm_length(void);
+uint32_t rdt_cpuid_10_1_ebx_cbm_enabled(void);
+uint32_t rdt_cpuid_10_1_ecx_cdp_enabled(void);
uint32_t rdt_get_cpuid_10_1_edx_cos_max(void);
+
+uint32_t rdt_get_cpuid_10_2_eax_cbm_length(void);
+uint32_t rdt_cpuid_10_2_ebx_cbm_enabled(void);
uint32_t rdt_get_cpuid_10_2_edx_cos_max(void);
+
+uint32_t rdt_get_cpuid_10_3_eax_thrtl_max(void);
+uint32_t rdt_cpuid_10_3_eax_linear_response_enabled(void);
uint32_t rdt_get_cpuid_10_3_edx_cos_max(void);
bool rdt_associate_rmid_cos(uint64_t msr_ia32_pqr_assoc);
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 3725dbbc4b..bbe2da8ebb 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -41,6 +41,7 @@
#include "hw/boards.h"
#include "hw/i386/sgx-epc.h"
#endif
+#include "hw/i386/rdt.h"
#include "disas/capstone.h"
#include "cpu-internal.h"
@@ -6725,6 +6726,76 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
assert(!(*eax & ~0x1f));
*ebx &= 0xffff; /* The count doesn't need to be reliable. */
break;
+#ifndef CONFIG_USER_ONLY
+ case 0xF:
+ /* Shared Resource Monitoring Enumeration Leaf */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_PQM))
+ break;
+ if (!(cpu->rdt)) {
+ warn_report("Intel RDT features enabled in commandline, "
+ "but rdt device not used");
+ break;
+ }
+ /* Non-zero count is ResId */
+ switch (count) {
+ /* Monitoring Resource Type Enumeration */
+ case 0:
+ *edx = env->features[FEAT_RDT_15_0_EDX];
+ *ebx = rdt_max_rmid(cpu->rdt);
+ break;
+ case 1:
+ *ebx = 1;
+ *ecx = rdt_max_rmid(cpu->rdt);
+ *edx = rdt_cpuid_15_1_edx_l3_total_bw_enabled() |
+ rdt_cpuid_15_1_edx_l3_local_bw_enabled() |
+ rdt_cpuid_15_1_edx_l3_occupancy_enabled();
+ break;
+ }
+ break;
+ case 0x10:
+ /* Shared Resource Director Technology Allocation Enumeration Leaf */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_PQE))
+ break;
+ if (!(cpu->rdt)) {
+ warn_report("Intel RDT features enabled in commandline, "
+ "but rdt device not used");
+ break;
+ }
+ /* Non-zero count is ResId */
+ switch (count) {
+ /* Cache Allocation Technology Available Resource Types */
+ case 0:
+ *ebx |= rdt_cpuid_10_0_ebx_l3_cat_enabled();
+ *ebx |= rdt_cpuid_10_0_ebx_l2_cat_enabled();
+ *ebx |= rdt_cpuid_10_0_ebx_l2_mba_enabled();
+ break;
+ case 1:
+ *eax = rdt_get_cpuid_10_1_eax_cbm_length();
+ *ebx = rdt_cpuid_10_1_ebx_cbm_enabled();
+ *ecx |= rdt_cpuid_10_1_ecx_cdp_enabled();
+ *edx = rdt_get_cpuid_10_1_edx_cos_max();
+ break;
+ case 2:
+ *eax = rdt_get_cpuid_10_2_eax_cbm_length();
+ *ebx = rdt_cpuid_10_2_ebx_cbm_enabled();
+ *edx = rdt_get_cpuid_10_2_edx_cos_max();
+ break;
+ case 3:
+ *eax = rdt_get_cpuid_10_3_eax_thrtl_max();
+ *ecx = rdt_cpuid_10_3_eax_linear_response_enabled();
+ *edx = rdt_get_cpuid_10_3_edx_cos_max();
+ break;
+ }
+ break;
+#endif
case 0x1C:
if (cpu->enable_pmu && (env->features[FEAT_7_0_EDX] &
CPUID_7_0_EDX_ARCH_LBR)) {
x86_cpu_get_supported_cpuid(0x1C, 0, eax, ebx, ecx, edx);
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 64a53efa30..98407c8e18 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -678,6 +678,7 @@ typedef enum FeatureWord {
FEAT_7_1_EDX, /* CPUID[EAX=7,ECX=1].EDX */
FEAT_7_2_EDX, /* CPUID[EAX=7,ECX=2].EDX */
FEAT_24_0_EBX, /* CPUID[EAX=0x24,ECX=0].EBX */
+ FEAT_RDT_15_0_EDX, /* CPUID[EAX=0xf,ECX=0].EDX (RDT CMT/MBM) */
FEATURE_WORDS,
} FeatureWord;
@@ -852,8 +853,12 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu,
FeatureWord w);
#define CPUID_7_0_EBX_RTM (1U << 11)
/* Zero out FPU CS and FPU DS */
#define CPUID_7_0_EBX_ZERO_FCS_FDS (1U << 13)
+/* Resource Director Technology Monitoring */
+#define CPUID_7_0_EBX_PQM (1U << 12)
/* Memory Protection Extension */
#define CPUID_7_0_EBX_MPX (1U << 14)
+/* Resource Director Technology Allocation */
+#define CPUID_7_0_EBX_PQE (1U << 15)
/* AVX-512 Foundation */
#define CPUID_7_0_EBX_AVX512F (1U << 16)
/* AVX-512 Doubleword & Quadword Instruction */
--
2.47.0.338.g60cca15819-goog
