linux-kernel - [PATCH v4 6/8] perf: arm_spe: Support new SPEv1.2/v8.7 'not taken' event

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Message-Id: <20220825-arm-spe-v8-7-v4-6-327f860daf28@kernel.org>
Date:   Mon, 09 Jan 2023 13:26:22 -0600
From:   Rob Herring <robh@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Cc:     Mark Brown <broonie@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvmarm@...ts.linux.dev, linux-perf-users@...r.kernel.org,
        James Clark <james.clark@....com>
Subject: [PATCH v4 6/8] perf: arm_spe: Support new SPEv1.2/v8.7 'not taken' event

Arm SPEv1.2 (Armv8.7/v9.2) adds a new event, 'not taken', in bit 6 of
the PMSEVFR_EL1 register. Update arm_spe_pmsevfr_res0() to support the
additional event.

Tested-by: James Clark <james.clark@....com>
Signed-off-by: Rob Herring <robh@...nel.org>
---
v4:
 - Rebase on v6.2-rc1
v3:
 - No change
v2:
 - Update for v6.1 sysreg generated header changes
---
 arch/arm64/include/asm/sysreg.h | 2 ++
 drivers/perf/arm_spe_pmu.c      | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index db269eda7c1c..fc8787727792 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -221,6 +221,8 @@
 	 BIT_ULL(6) | BIT_ULL(4) | BIT_ULL(2) | BIT_ULL(0))
 #define PMSEVFR_EL1_RES0_V1P1	\
 	(PMSEVFR_EL1_RES0_IMP & ~(BIT_ULL(18) | BIT_ULL(17) | BIT_ULL(11)))
+#define PMSEVFR_EL1_RES0_V1P2	\
+	(PMSEVFR_EL1_RES0_V1P1 & ~BIT_ULL(6))
 
 /* Buffer error reporting */
 #define PMBSR_EL1_FAULT_FSC_SHIFT	PMBSR_EL1_MSS_SHIFT
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index af6d3867c3e7..82f67e941bc4 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -677,9 +677,11 @@ static u64 arm_spe_pmsevfr_res0(u16 pmsver)
 	case ID_AA64DFR0_EL1_PMSVer_IMP:
 		return PMSEVFR_EL1_RES0_IMP;
 	case ID_AA64DFR0_EL1_PMSVer_V1P1:
+		return PMSEVFR_EL1_RES0_V1P1;
+	case ID_AA64DFR0_EL1_PMSVer_V1P2:
 	/* Return the highest version we support in default */
 	default:
-		return PMSEVFR_EL1_RES0_V1P1;
+		return PMSEVFR_EL1_RES0_V1P2;
 	}
 }
 

-- 
2.39.0