From 15ed3fa23cbcb9b9db842947698c3b4b2aeb706c Mon Sep 17 00:00:00 2001 From: James Clark Date: Thu, 5 Mar 2026 16:28:19 +0000 Subject: arm64: cpufeature: Use pmuv3_implemented() function Other places that are doing this version comparison are already using pmuv3_implemented(), so might as well use it here too for consistency. Signed-off-by: James Clark Reviewed-by: Marc Zyngier Reviewed-by: Colton Lewis Signed-off-by: Will Deacon --- arch/arm/include/asm/arm_pmuv3.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/arm_pmuv3.h b/arch/arm/include/asm/arm_pmuv3.h index 2ec0e5e83fc9..ecfede0c0348 100644 --- a/arch/arm/include/asm/arm_pmuv3.h +++ b/arch/arm/include/asm/arm_pmuv3.h @@ -238,6 +238,13 @@ static inline void kvm_vcpu_pmu_resync_el0(void) {} static inline bool pmuv3_implemented(int pmuver) { + /* + * PMUVer follows the standard ID scheme for an unsigned field with the + * exception of 0xF (IMP_DEF) which is treated specially and implies + * FEAT_PMUv3 is not implemented. + * + * See DDI0487L.a D24.1.3.2 for more details. + */ return !(pmuver == ARMV8_PMU_DFR_VER_IMP_DEF || pmuver == ARMV8_PMU_DFR_VER_NI); } -- cgit v1.2.3