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[PATCH v1 6/9] Add CPUID enumeration for RDT
|
From: |
Hendrik Wuethrich |
|
Subject: |
[PATCH v1 6/9] Add CPUID enumeration for RDT |
|
Date: |
Fri, 19 Jul 2024 16:29:26 +0000 |
From: Hendrik Wüthrich <whendrik@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 <whendrik@google.com>
---
hw/i386/rdt.c | 29 ++++++++++++++
include/hw/i386/rdt.h | 29 ++++++++++++++
target/i386/cpu.c | 91 +++++++++++++++++++++++++++++++++++++++++++
target/i386/cpu.h | 5 +++
4 files changed, 154 insertions(+)
diff --git a/hw/i386/rdt.c b/hw/i386/rdt.c
index 0d0e5751fc..5ad05f996a 100644
--- a/hw/i386/rdt.c
+++ b/hw/i386/rdt.c
@@ -17,8 +17,18 @@
#define MAX_L2_MASK_COUNT 48
#define MAX_MBA_THRTL_COUNT 31
+/* 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)
#define CPUID_10_1_EDX_COS_MAX MAX_L3_MASK_COUNT
+/* RDT L2 Allocation features*/
+#define CPUID_10_2_EAX_CBM_LENGTH 0xf
+#define CPUID_10_2_EBX_CBM 0x0
#define CPUID_10_2_EDX_COS_MAX MAX_L2_MASK_COUNT
+/* RDT MBA features */
+#define CPUID_10_3_EAX_THRTL_MAX 89
+#define CPUID_10_3_ECX_LINEAR_RESPONSE (1U << 2)
#define CPUID_10_3_EDX_COS_MAX MAX_MBA_THRTL_COUNT
#define TYPE_RDT "rdt"
@@ -61,8 +71,27 @@ 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 CPUID_10_1_EDX_COS_MAX;
}
+
+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 CPUID_10_2_EDX_COS_MAX;
}
+
+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 CPUID_10_3_EDX_COS_MAX;
}
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 51d36822f0..74aba33995 100644
--- a/include/hw/i386/rdt.h
+++ b/include/hw/i386/rdt.h
@@ -4,15 +4,44 @@
#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 RDTStateInstance RDTStateInstance;
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 4688d140c2..c61981bf82 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -42,6 +42,7 @@
#include "hw/boards.h"
#include "hw/i386/sgx-epc.h"
#endif
+#include "hw/i386/rdt.h"
#include "disas/capstone.h"
#include "cpu-internal.h"
@@ -6629,6 +6630,96 @@ 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;
+ assert(cpu->rdt);
+ /* 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;
+ /* L3 Cache Monitoring Capability Enumeration Data */
+ case 1:
+ /* Upscaling Factor */
+ *ebx = 1;
+ /* MaxRMID */
+ *ecx = rdt_max_rmid(cpu->rdt);
+ /* Set L3 Total BW */
+ *edx |= rdt_cpuid_15_1_edx_l3_total_bw_enabled();
+ /* Set L3 Local BW */
+ *edx |= rdt_cpuid_15_1_edx_l3_local_bw_enabled();
+ /* Set L3 Occupancy */
+ *edx |= rdt_cpuid_15_1_edx_l3_occupancy_enabled();
+ break;
+ default:
+ 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;
+ assert(cpu->rdt);
+ /* Non-zero count is ResId */
+ switch (count) {
+ /* Cache Allocation Technology Available Resource Types */
+ case 0:
+ /* Set L3 CAT */
+ *ebx |= rdt_cpuid_10_0_ebx_l3_cat_enabled();
+ /* Set L2 CAT */
+ *ebx |= rdt_cpuid_10_0_ebx_l2_cat_enabled();
+ /* Set MBA */
+ *ebx |= rdt_cpuid_10_0_ebx_l2_mba_enabled();
+ // *edx = env->features[FEAT_RDT_10_0_EBX];
+ break;
+ case 1:
+ /* Length of capacity bitmask in -1 notation */
+ *eax = rdt_get_cpuid_10_1_eax_cbm_length();
+ /* Capability bit mask */
+ *ebx = rdt_cpuid_10_1_ebx_cbm_enabled();
+ /* Code and Data priotitization */
+ *ecx |= rdt_cpuid_10_1_ecx_cdp_enabled();
+ /* Support for n COS masks (zero-referenced)*/
+ *edx = rdt_get_cpuid_10_1_edx_cos_max();
+ break;
+ case 2:
+ /* Length of capacity bitmask in -1 notation */
+ *eax = rdt_get_cpuid_10_2_eax_cbm_length();
+ /* Capability bit mask */
+ *ebx = rdt_cpuid_10_2_ebx_cbm_enabled();
+ /* Support for n COS masks (zero-referenced)*/
+ *edx = rdt_get_cpuid_10_2_edx_cos_max();
+ break;
+ case 3:
+ /* Max throttling value -1 (89 means 90) */
+ *eax = rdt_get_cpuid_10_3_eax_thrtl_max();
+ /* Linear response of delay values */
+ *ecx = rdt_cpuid_10_3_eax_linear_response_enabled();
+ /* Max number of CLOS -1 (15 means 16) */
+ *edx = rdt_get_cpuid_10_3_edx_cos_max();
+ break;
+ default:
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ 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 0b3aca2d02..12a4b989af 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -673,6 +673,7 @@ typedef enum FeatureWord {
FEAT_XSAVE_XSS_HI, /* CPUID[EAX=0xd,ECX=1].EDX */
FEAT_7_1_EDX, /* CPUID[EAX=7,ECX=1].EDX */
FEAT_7_2_EDX, /* CPUID[EAX=7,ECX=2].EDX */
+ FEAT_RDT_15_0_EDX, /* CPUID[EAX=0xf,ECX=0].EDX (RDT CMT/MBM) */
FEATURE_WORDS,
} FeatureWord;
@@ -843,8 +844,12 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu,
FeatureWord w);
#define CPUID_7_0_EBX_INVPCID (1U << 10)
/* Restricted Transactional Memory */
#define CPUID_7_0_EBX_RTM (1U << 11)
+/* 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 */
--
2.45.2.1089.g2a221341d9-goog
- [PATCH v1 5/9] Add RDT device interface through MSRs, (continued)
- [PATCH v1 5/9] Add RDT device interface through MSRs, Hendrik Wuethrich, 2024/07/19
- [PATCH v1 2/9] Add state for RDT device., Hendrik Wuethrich, 2024/07/19
- [PATCH v1 9/9] Adjust level for RDT on full_cpuid_auto_level, Hendrik Wuethrich, 2024/07/19
- [PATCH v1 4/9] Add RDT functionality, Hendrik Wuethrich, 2024/07/19
- [PATCH v1 8/9] Adjust CPUID level for RDT features, Hendrik Wuethrich, 2024/07/19
- [PATCH v1 1/9] Add Intel RDT device to config., Hendrik Wuethrich, 2024/07/19
- [PATCH v1 6/9] Add CPUID enumeration for RDT,
Hendrik Wuethrich <=
- [PATCH v1 3/9] Add init and realize funciontality for RDT device., Hendrik Wuethrich, 2024/07/19
- [PATCH v1 7/9] Add RDT feature flags., Hendrik Wuethrich, 2024/07/19