Add a cpucap for FEAT_PMUv3_PMICNTR, meaning there is a dedicated instruction counter as well as the cycle counter.
Signed-off-by: Colton Lewis coltonlewis@google.com --- arch/arm64/kernel/cpufeature.c | 7 +++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 8 insertions(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 278294fdc97d..85dea9714928 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2904,6 +2904,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64DFR0_EL1, HPMN0, IMP) }, + { + .desc = "PMU Dedicated Instruction Counter", + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .capability = ARM64_HAS_PMICNTR, + .matches = has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64DFR1_EL1, PMICNTR, IMP) + }, #ifdef CONFIG_ARM64_SME { .desc = "Scalable Matrix Extension", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 5b196ba21629..6dd72fcdd612 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -47,6 +47,7 @@ HAS_LSE_ATOMICS HAS_MOPS HAS_NESTED_VIRT HAS_PAN +HAS_PMICNTR HAS_PMUV3 HAS_S1PIE HAS_S1POE