This patch enables core PMU features for Diamond Rapids (Panther Cove
microarchitecture), including Panther Cove specific counter and PEBS
constraints, a new cache events ID table, and the model-specific OMR
events extra registers table.
For detailed information about counter constraints, please refer to
section 16.3 "COUNTER RESTRICTIONS" in the ISE documentation.
ISE: https://www.intel.com/content/www/us/en/content-details/869288/intel-architecture-instruction-set-extensions-programming-reference.html
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
---
arch/x86/events/intel/core.c | 182 +++++++++++++++++++++++++++++++++++
arch/x86/events/intel/ds.c | 27 ++++++
arch/x86/events/perf_event.h | 2 +
3 files changed, 211 insertions(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 6ea3260f6422..82fac6e8731b 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -435,6 +435,62 @@ static struct extra_reg intel_lnc_extra_regs[] __read_mostly = {
EVENT_EXTRA_END
};
+static struct event_constraint intel_pnc_event_constraints[] = {
+ FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
+ FIXED_EVENT_CONSTRAINT(0x0100, 0), /* INST_RETIRED.PREC_DIST */
+ FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
+ FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
+ FIXED_EVENT_CONSTRAINT(0x013c, 2), /* CPU_CLK_UNHALTED.REF_TSC_P */
+ FIXED_EVENT_CONSTRAINT(0x0400, 3), /* SLOTS */
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_RETIRING, 0),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_BAD_SPEC, 1),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_FE_BOUND, 2),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_BE_BOUND, 3),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_HEAVY_OPS, 4),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_BR_MISPREDICT, 5),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_FETCH_LAT, 6),
+ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_MEM_BOUND, 7),
+
+ INTEL_EVENT_CONSTRAINT(0x20, 0xf),
+ INTEL_EVENT_CONSTRAINT(0x79, 0xf),
+
+ INTEL_UEVENT_CONSTRAINT(0x0275, 0xf),
+ INTEL_UEVENT_CONSTRAINT(0x0176, 0xf),
+ INTEL_UEVENT_CONSTRAINT(0x04a4, 0x1),
+ INTEL_UEVENT_CONSTRAINT(0x08a4, 0x1),
+ INTEL_UEVENT_CONSTRAINT(0x01cd, 0xfc),
+ INTEL_UEVENT_CONSTRAINT(0x02cd, 0x3),
+
+ INTEL_EVENT_CONSTRAINT(0xd0, 0xf),
+ INTEL_EVENT_CONSTRAINT(0xd1, 0xf),
+ INTEL_EVENT_CONSTRAINT(0xd4, 0xf),
+ INTEL_EVENT_CONSTRAINT(0xd6, 0xf),
+ INTEL_EVENT_CONSTRAINT(0xdf, 0xf),
+ INTEL_EVENT_CONSTRAINT(0xce, 0x1),
+
+ INTEL_UEVENT_CONSTRAINT(0x01b1, 0x8),
+ INTEL_UEVENT_CONSTRAINT(0x0847, 0xf),
+ INTEL_UEVENT_CONSTRAINT(0x0446, 0xf),
+ INTEL_UEVENT_CONSTRAINT(0x0846, 0xf),
+ INTEL_UEVENT_CONSTRAINT(0x0148, 0xf),
+
+ EVENT_CONSTRAINT_END
+};
+
+static struct extra_reg intel_pnc_extra_regs[] __read_mostly = {
+ /* must define OMR_X first, see intel_alt_er() */
+ INTEL_UEVENT_EXTRA_REG(0x012a, MSR_OMR_0, 0x40ffffff0000ffffull, OMR_0),
+ INTEL_UEVENT_EXTRA_REG(0x022a, MSR_OMR_1, 0x40ffffff0000ffffull, OMR_1),
+ INTEL_UEVENT_EXTRA_REG(0x042a, MSR_OMR_2, 0x40ffffff0000ffffull, OMR_2),
+ INTEL_UEVENT_EXTRA_REG(0x082a, MSR_OMR_3, 0x40ffffff0000ffffull, OMR_3),
+ INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x01cd),
+ INTEL_UEVENT_EXTRA_REG(0x02c6, MSR_PEBS_FRONTEND, 0x9, FE),
+ INTEL_UEVENT_EXTRA_REG(0x03c6, MSR_PEBS_FRONTEND, 0x7fff1f, FE),
+ INTEL_UEVENT_EXTRA_REG(0x40ad, MSR_PEBS_FRONTEND, 0xf, FE),
+ INTEL_UEVENT_EXTRA_REG(0x04c2, MSR_PEBS_FRONTEND, 0x8, FE),
+ EVENT_EXTRA_END
+};
+
EVENT_ATTR_STR(mem-loads, mem_ld_nhm, "event=0x0b,umask=0x10,ldlat=3");
EVENT_ATTR_STR(mem-loads, mem_ld_snb, "event=0xcd,umask=0x1,ldlat=3");
EVENT_ATTR_STR(mem-stores, mem_st_snb, "event=0xcd,umask=0x2");
@@ -650,6 +706,102 @@ static __initconst const u64 glc_hw_cache_extra_regs
},
};
+static __initconst const u64 pnc_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x81d0,
+ [ C(RESULT_MISS) ] = 0xe124,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x82d0,
+ },
+ },
+ [ C(L1I ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_MISS) ] = 0xe424,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x12a,
+ [ C(RESULT_MISS) ] = 0x12a,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x12a,
+ [ C(RESULT_MISS) ] = 0x12a,
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x81d0,
+ [ C(RESULT_MISS) ] = 0xe12,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x82d0,
+ [ C(RESULT_MISS) ] = 0xe13,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = 0xe11,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4c4,
+ [ C(RESULT_MISS) ] = 0x4c5,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(NODE) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static __initconst const u64 pnc_hw_cache_extra_regs
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4000000000000001,
+ [ C(RESULT_MISS) ] = 0xFFFFF000000001,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4000000000000002,
+ [ C(RESULT_MISS) ] = 0xFFFFF000000002,
+ },
+ },
+};
+
/*
* Notes on the events:
* - data reads do not include code reads (comparable to earlier tables)
@@ -7230,6 +7382,20 @@ static __always_inline void intel_pmu_init_lnc(struct pmu *pmu)
hybrid(pmu, extra_regs) = intel_lnc_extra_regs;
}
+static __always_inline void intel_pmu_init_pnc(struct pmu *pmu)
+{
+ intel_pmu_init_glc(pmu);
+ x86_pmu.flags &= ~PMU_FL_HAS_RSP_1;
+ x86_pmu.flags |= PMU_FL_HAS_OMR;
+ memcpy(hybrid_var(pmu, hw_cache_event_ids),
+ pnc_hw_cache_event_ids, sizeof(hw_cache_event_ids));
+ memcpy(hybrid_var(pmu, hw_cache_extra_regs),
+ pnc_hw_cache_extra_regs, sizeof(hw_cache_extra_regs));
+ hybrid(pmu, event_constraints) = intel_pnc_event_constraints;
+ hybrid(pmu, pebs_constraints) = intel_pnc_pebs_event_constraints;
+ hybrid(pmu, extra_regs) = intel_pnc_extra_regs;
+}
+
static __always_inline void intel_pmu_init_skt(struct pmu *pmu)
{
intel_pmu_init_grt(pmu);
@@ -7906,6 +8072,22 @@ __init int intel_pmu_init(void)
intel_pmu_pebs_data_source_skl(true);
break;
+ case INTEL_DIAMONDRAPIDS_X:
+ intel_pmu_init_pnc(NULL);
+ x86_pmu.pebs_ept = 1;
+ x86_pmu.hw_config = hsw_hw_config;
+ x86_pmu.pebs_latency_data = pnc_latency_data;
+ x86_pmu.get_event_constraints = glc_get_event_constraints;
+ extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
+ hsw_format_attr : nhm_format_attr;
+ extra_skl_attr = skl_format_attr;
+ mem_attr = glc_events_attrs;
+ td_attr = glc_td_events_attrs;
+ tsx_attr = glc_tsx_events_attrs;
+ pr_cont("Panthercove events, ");
+ name = "panthercove";
+ break;
+
case INTEL_ALDERLAKE:
case INTEL_ALDERLAKE_L:
case INTEL_RAPTORLAKE:
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 272e652f25fc..06e42ac33749 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -1425,6 +1425,33 @@ struct event_constraint intel_lnc_pebs_event_constraints[] = {
EVENT_CONSTRAINT_END
};
+struct event_constraint intel_pnc_pebs_event_constraints[] = {
+ INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */
+ INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL),
+
+ INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0xfc),
+ INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3),
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
+ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
+
+ INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf),
+
+ INTEL_FLAGS_EVENT_CONSTRAINT(0xd0, 0xf),
+ INTEL_FLAGS_EVENT_CONSTRAINT(0xd6, 0xf),
+
+ /*
+ * Everything else is handled by PMU_FL_PEBS_ALL, because we
+ * need the full constraints from the main table.
+ */
+
+ EVENT_CONSTRAINT_END
+};
+
struct event_constraint *intel_pebs_constraints(struct perf_event *event)
{
struct event_constraint *pebs_constraints = hybrid(event->pmu, pebs_constraints);
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index bd501c2a0f73..cbca1888e8f7 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -1698,6 +1698,8 @@ extern struct event_constraint intel_glc_pebs_event_constraints[];
extern struct event_constraint intel_lnc_pebs_event_constraints[];
+extern struct event_constraint intel_pnc_pebs_event_constraints[];
+
struct event_constraint *intel_pebs_constraints(struct perf_event *event);
void intel_pmu_pebs_add(struct perf_event *event);
--
2.34.1On Mon, Jan 12, 2026 at 01:16:45PM +0800, Dapeng Mi wrote:
> @@ -7906,6 +8072,22 @@ __init int intel_pmu_init(void)
> intel_pmu_pebs_data_source_skl(true);
> break;
>
> + case INTEL_DIAMONDRAPIDS_X:
> + intel_pmu_init_pnc(NULL);
> + x86_pmu.pebs_ept = 1;
> + x86_pmu.hw_config = hsw_hw_config;
> + x86_pmu.pebs_latency_data = pnc_latency_data;
> + x86_pmu.get_event_constraints = glc_get_event_constraints;
> + extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
> + hsw_format_attr : nhm_format_attr;
> + extra_skl_attr = skl_format_attr;
> + mem_attr = glc_events_attrs;
> + td_attr = glc_td_events_attrs;
> + tsx_attr = glc_tsx_events_attrs;
> + pr_cont("Panthercove events, ");
> + name = "panthercove";
> + break;
> +
> case INTEL_ALDERLAKE:
> case INTEL_ALDERLAKE_L:
> case INTEL_RAPTORLAKE:
Does something like so make sense?
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -8066,6 +8066,9 @@ __init int intel_pmu_init(void)
glc_common:
intel_pmu_init_glc(NULL);
+ intel_pmu_pebs_data_source_skl(true);
+
+ glc_base:
x86_pmu.pebs_ept = 1;
x86_pmu.hw_config = hsw_hw_config;
x86_pmu.get_event_constraints = glc_get_event_constraints;
@@ -8075,24 +8078,14 @@ __init int intel_pmu_init(void)
mem_attr = glc_events_attrs;
td_attr = glc_td_events_attrs;
tsx_attr = glc_tsx_events_attrs;
- intel_pmu_pebs_data_source_skl(true);
break;
case INTEL_DIAMONDRAPIDS_X:
- intel_pmu_init_pnc(NULL);
- x86_pmu.pebs_ept = 1;
- x86_pmu.hw_config = hsw_hw_config;
- x86_pmu.pebs_latency_data = pnc_latency_data;
- x86_pmu.get_event_constraints = glc_get_event_constraints;
- extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
- hsw_format_attr : nhm_format_attr;
- extra_skl_attr = skl_format_attr;
- mem_attr = glc_events_attrs;
- td_attr = glc_td_events_attrs;
- tsx_attr = glc_tsx_events_attrs;
pr_cont("Panthercove events, ");
name = "panthercove";
- break;
+ intel_pmu_init_pnc(NULL);
+ x86_pmu.pebs_latency_data = pnc_latency_data;
+ goto glc_base;
case INTEL_ALDERLAKE:
case INTEL_ALDERLAKE_L:
On 1/12/2026 6:41 PM, Peter Zijlstra wrote:
> On Mon, Jan 12, 2026 at 01:16:45PM +0800, Dapeng Mi wrote:
>> @@ -7906,6 +8072,22 @@ __init int intel_pmu_init(void)
>> intel_pmu_pebs_data_source_skl(true);
>> break;
>>
>> + case INTEL_DIAMONDRAPIDS_X:
>> + intel_pmu_init_pnc(NULL);
>> + x86_pmu.pebs_ept = 1;
>> + x86_pmu.hw_config = hsw_hw_config;
>> + x86_pmu.pebs_latency_data = pnc_latency_data;
>> + x86_pmu.get_event_constraints = glc_get_event_constraints;
>> + extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
>> + hsw_format_attr : nhm_format_attr;
>> + extra_skl_attr = skl_format_attr;
>> + mem_attr = glc_events_attrs;
>> + td_attr = glc_td_events_attrs;
>> + tsx_attr = glc_tsx_events_attrs;
>> + pr_cont("Panthercove events, ");
>> + name = "panthercove";
>> + break;
>> +
>> case INTEL_ALDERLAKE:
>> case INTEL_ALDERLAKE_L:
>> case INTEL_RAPTORLAKE:
> Does something like so make sense?
>
>
> --- a/arch/x86/events/intel/core.c
> +++ b/arch/x86/events/intel/core.c
> @@ -8066,6 +8066,9 @@ __init int intel_pmu_init(void)
>
> glc_common:
> intel_pmu_init_glc(NULL);
> + intel_pmu_pebs_data_source_skl(true);
> +
> + glc_base:
> x86_pmu.pebs_ept = 1;
> x86_pmu.hw_config = hsw_hw_config;
> x86_pmu.get_event_constraints = glc_get_event_constraints;
> @@ -8075,24 +8078,14 @@ __init int intel_pmu_init(void)
> mem_attr = glc_events_attrs;
> td_attr = glc_td_events_attrs;
> tsx_attr = glc_tsx_events_attrs;
> - intel_pmu_pebs_data_source_skl(true);
> break;
>
> case INTEL_DIAMONDRAPIDS_X:
> - intel_pmu_init_pnc(NULL);
> - x86_pmu.pebs_ept = 1;
> - x86_pmu.hw_config = hsw_hw_config;
> - x86_pmu.pebs_latency_data = pnc_latency_data;
> - x86_pmu.get_event_constraints = glc_get_event_constraints;
> - extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
> - hsw_format_attr : nhm_format_attr;
> - extra_skl_attr = skl_format_attr;
> - mem_attr = glc_events_attrs;
> - td_attr = glc_td_events_attrs;
> - tsx_attr = glc_tsx_events_attrs;
> pr_cont("Panthercove events, ");
> name = "panthercove";
> - break;
> + intel_pmu_init_pnc(NULL);
> + x86_pmu.pebs_latency_data = pnc_latency_data;
> + goto glc_base;
>
> case INTEL_ALDERLAKE:
> case INTEL_ALDERLAKE_L:
Yes, that looks better, but "goto behind" seems a little weird, I tweak the
code a little bit. Thanks.
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 77cf849a1381..85134d80d9fc 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -8155,26 +8155,23 @@ __init int intel_pmu_init(void)
x86_pmu.extra_regs = intel_rwc_extra_regs;
pr_cont("Granite Rapids events, ");
name = "granite_rapids";
+ goto glc_common;
+
+ case INTEL_DIAMONDRAPIDS_X:
+ intel_pmu_init_pnc(NULL);
+ x86_pmu.pebs_latency_data = pnc_latency_data;
+
+ pr_cont("Panthercove events, ");
+ name = "panthercove";
+ goto glc_base;
glc_common:
intel_pmu_init_glc(NULL);
- x86_pmu.pebs_ept = 1;
- x86_pmu.hw_config = hsw_hw_config;
- x86_pmu.get_event_constraints = glc_get_event_constraints;
- extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
- hsw_format_attr : nhm_format_attr;
- extra_skl_attr = skl_format_attr;
- mem_attr = glc_events_attrs;
- td_attr = glc_td_events_attrs;
- tsx_attr = glc_tsx_events_attrs;
intel_pmu_pebs_data_source_skl(true);
- break;
- case INTEL_DIAMONDRAPIDS_X:
- intel_pmu_init_pnc(NULL);
+ glc_base:
x86_pmu.pebs_ept = 1;
x86_pmu.hw_config = hsw_hw_config;
- x86_pmu.pebs_latency_data = pnc_latency_data;
x86_pmu.get_event_constraints = glc_get_event_constraints;
extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
hsw_format_attr : nhm_format_attr;
@@ -8182,8 +8179,6 @@ __init int intel_pmu_init(void)
mem_attr = glc_events_attrs;
td_attr = glc_td_events_attrs;
tsx_attr = glc_tsx_events_attrs;
- pr_cont("Panthercove events, ");
- name = "panthercove";
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