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[PATCH v3 5/8] i386: Add CPUID enumeration for RDT
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From: |
Hendrik Wuethrich |
|
Subject: |
[PATCH v3 5/8] i386: Add CPUID enumeration for RDT |
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Date: |
Wed, 4 Dec 2024 08:48:34 +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 | 33 +++++++++++++++++++++
include/hw/i386/rdt.h | 31 +++++++++++++++++++
target/i386/cpu.c | 69 +++++++++++++++++++++++++++++++++++++++++++
target/i386/cpu.h | 5 ++++
4 files changed, 138 insertions(+)
diff --git a/hw/i386/rdt.c b/hw/i386/rdt.c
index f295273aec..a3c748c127 100644
--- a/hw/i386/rdt.c
+++ b/hw/i386/rdt.c
@@ -31,6 +31,20 @@
#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)
+#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"
#define RDT_NUM_RMID_PROP "rmids"
@@ -77,8 +91,27 @@ 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 4688d140c2..a8198fe5a7 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 +6630,74 @@ 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 d7d5ad37fd..1520a93927 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 */
--
2.47.0.338.g60cca15819-goog
- [PATCH v3 0/8] The aim of this patch series is to emulate Intel RDT features in order to make testing of the linux Resctrl subsystem possible with Qemu., Hendrik Wuethrich, 2024/12/04
- [PATCH v3 1/8] i386: Add Intel RDT device and State to config., Hendrik Wuethrich, 2024/12/04
- [PATCH v3 2/8] i386: Add init and realize funciontality for RDT device., Hendrik Wuethrich, 2024/12/04
- [PATCH v3 3/8] i386: Add RDT functionality, Hendrik Wuethrich, 2024/12/04
- [PATCH v3 4/8] i386: Add RDT device interface through MSRs, Hendrik Wuethrich, 2024/12/04
- [PATCH v3 6/8] i386: Add RDT feature flags., Hendrik Wuethrich, 2024/12/04
- [PATCH v3 5/8] i386: Add CPUID enumeration for RDT,
Hendrik Wuethrich <=
- [PATCH v3 7/8] i386/cpu: Adjust CPUID level for RDT features, Hendrik Wuethrich, 2024/12/04
- [PATCH v3 8/8] i386/cpu: Adjust level for RDT on full_cpuid_auto_level, Hendrik Wuethrich, 2024/12/04