1. Patchew
  2. linux
  3. View series

[tip: perf/core] perf/x86/intel: Update event constraints and cache_extra_regsfor LNL

tip-bot2 for Dapeng Mi posted 1 patch 4 days, 14 hours ago 
arch/x86/events/intel/core.c | 62 ++++++++++++++++++++++++++++-------
arch/x86/events/intel/ds.c   |  8 +++++-
2 files changed, 59 insertions(+), 11 deletions(-)
[tip: perf/core] perf/x86/intel: Update event constraints and cache_extra_regsfor LNL
Posted by tip-bot2 for Dapeng Mi 4 days, 14 hours ago 
The following commit has been merged into the perf/core branch of tip:

Commit-ID:     331c3e4fa39a87560c09bdd878652090ae040b69
Gitweb:        https://git.kernel.org/tip/331c3e4fa39a87560c09bdd878652090ae040b69
Author:        Dapeng Mi <dapeng1.mi@linux.intel.com>
AuthorDate:    Fri, 15 May 2026 14:11:38 +08:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Tue, 19 May 2026 13:49:04 +02:00

perf/x86/intel: Update event constraints and cache_extra_regsfor LNL

Update perf hard-coded event constraints and cache_extra_regs[] for
Lunarlake according to the latest LNL perfmon events (V1.22).

LNL introduces new extra register values for the OCR L3 cache events,
so introduce lnc_hw_cache_extra_regs[] and skt_hw_cache_extra_regs[] to
reflect the changes.

LNL perfmon events:
https://github.com/intel/perfmon/blob/main/LNL/events/lunarlake_lioncove_core.json
https://github.com/intel/perfmon/blob/main/LNL/events/lunarlake_skymont_core.json

Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260515061143.338553-7-dapeng1.mi@linux.intel.com
---
 arch/x86/events/intel/core.c | 62 ++++++++++++++++++++++++++++-------
 arch/x86/events/intel/ds.c   |  8 +++++-
 2 files changed, 59 insertions(+), 11 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 8161912..dc0991c 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -225,12 +225,17 @@ static struct event_constraint intel_grt_event_constraints[] __read_mostly = {
 
 static struct event_constraint intel_skt_event_constraints[] __read_mostly = {
 	FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
+	FIXED_EVENT_CONSTRAINT(0x0100, 0), /* pseudo INST_RETIRED.ANY */
 	FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
-	FIXED_EVENT_CONSTRAINT(0x0300, 2), /* pseudo CPU_CLK_UNHALTED.REF */
+	FIXED_EVENT_CONSTRAINT(0x0200, 1), /* pseudo CPU_CLK_UNHALTED.THREAD */
+	FIXED_EVENT_CONSTRAINT(0x0300, 2), /* pseudo CPU_CLK_UNHALTED.REF_TSC */
 	FIXED_EVENT_CONSTRAINT(0x013c, 2), /* CPU_CLK_UNHALTED.REF_TSC_P */
 	FIXED_EVENT_CONSTRAINT(0x0073, 4), /* TOPDOWN_BAD_SPECULATION.ALL */
+	FIXED_EVENT_CONSTRAINT(0x0500, 4), /* pseudo TOPDOWN_BAD_SPECULATION.ALL */
 	FIXED_EVENT_CONSTRAINT(0x019c, 5), /* TOPDOWN_FE_BOUND.ALL */
+	FIXED_EVENT_CONSTRAINT(0x0600, 5), /* pseudo TOPDOWN_FE_BOUND.ALL */
 	FIXED_EVENT_CONSTRAINT(0x02c2, 6), /* TOPDOWN_RETIRING.ALL */
+	FIXED_EVENT_CONSTRAINT(0x0700, 6), /* pseudo TOPDOWN_RETIRING.ALL */
 	EVENT_CONSTRAINT_END
 };
 
@@ -415,11 +420,12 @@ static struct extra_reg intel_rwc_extra_regs[] __read_mostly = {
 
 static struct event_constraint intel_lnc_event_constraints[] = {
 	FIXED_EVENT_CONSTRAINT(0x00c0, 0),	/* INST_RETIRED.ANY */
-	FIXED_EVENT_CONSTRAINT(0x0100, 0),	/* INST_RETIRED.PREC_DIST */
+	FIXED_EVENT_CONSTRAINT(0x0100, 0),	/* pseudo INST_RETIRED.ANY */
 	FIXED_EVENT_CONSTRAINT(0x003c, 1),	/* CPU_CLK_UNHALTED.CORE */
-	FIXED_EVENT_CONSTRAINT(0x0300, 2),	/* CPU_CLK_UNHALTED.REF */
+	FIXED_EVENT_CONSTRAINT(0x0200, 1),	/* pseudo CPU_CLK_UNHALTED.THREAD */
+	FIXED_EVENT_CONSTRAINT(0x0300, 2),	/* pseudo CPU_CLK_UNHALTED.REF_TSC */
 	FIXED_EVENT_CONSTRAINT(0x013c, 2),	/* CPU_CLK_UNHALTED.REF_TSC_P */
-	FIXED_EVENT_CONSTRAINT(0x0400, 3),	/* SLOTS */
+	FIXED_EVENT_CONSTRAINT(0x0400, 3),	/* pseudo TOPDOWN.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),
@@ -431,8 +437,6 @@ static struct event_constraint intel_lnc_event_constraints[] = {
 
 	INTEL_EVENT_CONSTRAINT(0x20, 0xf),
 
-	INTEL_UEVENT_CONSTRAINT(0x012a, 0xf),
-	INTEL_UEVENT_CONSTRAINT(0x012b, 0xf),
 	INTEL_UEVENT_CONSTRAINT(0x0148, 0x4),
 	INTEL_UEVENT_CONSTRAINT(0x0175, 0x4),
 
@@ -443,15 +447,14 @@ static struct event_constraint intel_lnc_event_constraints[] = {
 	INTEL_UEVENT_CONSTRAINT(0x0ca3, 0x4),
 	INTEL_UEVENT_CONSTRAINT(0x04a4, 0x1),
 	INTEL_UEVENT_CONSTRAINT(0x08a4, 0x1),
-	INTEL_UEVENT_CONSTRAINT(0x10a4, 0x1),
+	INTEL_UEVENT_CONSTRAINT(0x10a4, 0x8),
 	INTEL_UEVENT_CONSTRAINT(0x01b1, 0x8),
 	INTEL_UEVENT_CONSTRAINT(0x01cd, 0x3fc),
 	INTEL_UEVENT_CONSTRAINT(0x02cd, 0x3),
 
+	INTEL_UEVENT_CONSTRAINT(0x87d0, 0x3ff),
 	INTEL_EVENT_CONSTRAINT_RANGE(0xd0, 0xdf, 0xf),
 
-	INTEL_UEVENT_CONSTRAINT(0x00e0, 0xf),
-
 	EVENT_CONSTRAINT_END
 };
 
@@ -830,6 +833,23 @@ static __initconst const u64 adl_glc_hw_cache_extra_regs
  },
 };
 
+static __initconst const u64 lnc_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) ] = 0x10001,		/* OCR.DEMAND_DATA_RD.ANY_RESPONSE */
+		[ C(RESULT_MISS)   ] = 0x9E7FA000001,	/* OCR.DEMAND_DATA_RD.L3_MISS */
+	},
+	[ C(OP_WRITE) ] = {
+		[ C(RESULT_ACCESS) ] = 0x10002,		/* OCR.DEMAND_RFO.ANY_RESPONSE */
+		[ C(RESULT_MISS)   ] = 0x9E7FA000002,	/* OCR.DEMAND_RFO.L3_MISS */
+	},
+ },
+};
+
 static __initconst const u64 pnc_hw_cache_event_ids
 				[PERF_COUNT_HW_CACHE_MAX]
 				[PERF_COUNT_HW_CACHE_OP_MAX]
@@ -2510,6 +2530,22 @@ static __initconst const u64 cmt_hw_cache_extra_regs
 	},
 };
 
+static __initconst const u64 skt_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)]	= 0x10001,		/* OCR.DEMAND_DATA_RD.ANY_RESPONSE */
+			[C(RESULT_MISS)]	= 0x13FBFC00001,	/* OCR.DEMAND_DATA_RD.L3_MISS */
+		},
+		[C(OP_WRITE)] = {
+			[C(RESULT_ACCESS)]	= 0x10002,		/* OCR.DEMAND_RFO.ANY_RESPONSE */
+			[C(RESULT_MISS)]	= 0x13FBFC00002,	/* OCR.DEMAND_RFO.L3_MISS */
+		},
+	},
+};
+
 static __initconst const u64 arw_hw_cache_extra_regs
 				[PERF_COUNT_HW_CACHE_MAX]
 				[PERF_COUNT_HW_CACHE_OP_MAX]
@@ -7707,6 +7743,9 @@ static __always_inline void intel_pmu_init_lnc(struct pmu *pmu)
 	hybrid(pmu, event_constraints) = intel_lnc_event_constraints;
 	hybrid(pmu, pebs_constraints) = intel_lnc_pebs_event_constraints;
 	hybrid(pmu, extra_regs) = intel_lnc_extra_regs;
+
+	memcpy(hybrid_var(pmu, hw_cache_event_ids), adl_glc_hw_cache_event_ids, sizeof(hw_cache_event_ids));
+	memcpy(hybrid_var(pmu, hw_cache_extra_regs), lnc_hw_cache_extra_regs, sizeof(hw_cache_extra_regs));
 }
 
 static __always_inline void intel_pmu_init_pnc(struct pmu *pmu)
@@ -7726,9 +7765,10 @@ static __always_inline void intel_pmu_init_pnc(struct pmu *pmu)
 
 static __always_inline void intel_pmu_init_skt(struct pmu *pmu)
 {
-	intel_pmu_init_grt(pmu);
+	intel_pmu_init_cmt(pmu);
 	hybrid(pmu, event_constraints) = intel_skt_event_constraints;
-	hybrid(pmu, extra_regs) = intel_cmt_extra_regs;
+	memcpy(hybrid_var(pmu, hw_cache_extra_regs),
+	       skt_hw_cache_extra_regs, sizeof(hw_cache_extra_regs));
 	static_call_update(intel_pmu_enable_acr_event, intel_pmu_enable_acr);
 }
 
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 75b7f6f..ce23b50 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -1507,6 +1507,13 @@ struct event_constraint intel_lnc_pebs_event_constraints[] = {
 	INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL),	/* INST_RETIRED.PREC_DIST */
 	INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL),
 
+	INTEL_FLAGS_UEVENT_CONSTRAINT(0x012a, 0x1),		/* OCR.* events */
+	INTEL_FLAGS_UEVENT_CONSTRAINT(0x012b, 0x1),		/* OCR.* events */
+
+	INTEL_FLAGS_UEVENT_CONSTRAINT(0x04a4, 0x1),		/* TOPDOWN.BAD_SPEC_SLOTS */
+	INTEL_FLAGS_UEVENT_CONSTRAINT(0x08a4, 0x1),		/* TOPDOWN.BR_MISPREDICT_SLOTS */
+	INTEL_FLAGS_UEVENT_CONSTRAINT(0x10a4, 0x8),		/* TOPDOWN.MEMORY_BOUND_SLOTS */
+
 	INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0x3fc),
 	INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3),
 	INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf),	/* MEM_INST_RETIRED.STLB_MISS_LOADS */
@@ -1516,6 +1523,7 @@ struct event_constraint intel_lnc_pebs_event_constraints[] = {
 	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_UEVENT_CONSTRAINT(0x87d0, 0x3ff),		/* MEM_INST_RETIRED.ANY */
 
 	INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf),

Patchew 2.1-devel-ea86937

© 2016 - 2026 Red Hat, Inc.