[PATCH 03/11] perf/x86/intel: Update event constraints for DMR

From: Dapeng Mi

Date: Fri May 15 2026 - 02:17:31 EST


Add missed event constraint for 0x0200 event and add comments to show
the event names in pnc_hw_cache_extra_regs[].

Signed-off-by: Dapeng Mi <dapeng1.mi@xxxxxxxxxxxxxxx>
---
arch/x86/events/intel/core.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index b3ccc785a4f6..0d0edc2d1b90 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -466,11 +466,12 @@ static struct extra_reg intel_lnc_extra_regs[] __read_mostly = {

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(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),
@@ -821,12 +822,12 @@ static __initconst const u64 pnc_hw_cache_extra_regs
{
[ C(LL ) ] = {
[ C(OP_READ) ] = {
- [ C(RESULT_ACCESS) ] = 0x4000000000000001,
- [ C(RESULT_MISS) ] = 0xFFFFF000000001,
+ [ C(RESULT_ACCESS) ] = 0x4000000000000001, /* OMR.DEMAND_DATA_RD.ANY_RESPONSE */
+ [ C(RESULT_MISS) ] = 0xFFFFF000000001, /* OMR.DEMAND_DATA_RD.L3_MISS */
},
[ C(OP_WRITE) ] = {
- [ C(RESULT_ACCESS) ] = 0x4000000000000002,
- [ C(RESULT_MISS) ] = 0xFFFFF000000002,
+ [ C(RESULT_ACCESS) ] = 0x4000000000000002, /* OMR.DEMAND_RFO.ANY_RESPONSE */
+ [ C(RESULT_MISS) ] = 0xFFFFF000000002, /* OMR.DEMAND_RFO.L3_MISS */
},
},
};
--
2.34.1