diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2022-11-28 16:56:29 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-28 17:04:08 +0300 |
| commit | 86815735aa571d493cf5768cad5fa8e6fd9c7ba8 (patch) | |
| tree | 6a1777f6833447a09eefeb15f9b471328763ec2e | |
| parent | d56bdce586e7fabd2b3339f476e0e4c059b24e19 (diff) | |
| download | linux-86815735aa571d493cf5768cad5fa8e6fd9c7ba8.tar.xz | |
KVM: arm64: PMU: Replace version number '0' with ID_AA64DFR0_EL1_PMUVer_NI
kvm_host_pmu_init() returns when detected PMU is either not implemented, or
implementation defined. kvm_pmu_probe_armpmu() also has a similar situation.
Extracted ID_AA64DFR0_EL1_PMUVer value, when PMU is not implemented is '0',
which can be replaced with ID_AA64DFR0_EL1_PMUVer_NI defined as '0b0000'.
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221128135629.118346-1-anshuman.khandual@arm.com
| -rw-r--r-- | arch/arm64/kvm/pmu-emul.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index 3295dea34f4c..bb7251e670a9 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -668,7 +668,8 @@ void kvm_host_pmu_init(struct arm_pmu *pmu) { struct arm_pmu_entry *entry; - if (pmu->pmuver == 0 || pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF) + if (pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_NI || + pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF) return; mutex_lock(&arm_pmus_lock); @@ -721,7 +722,7 @@ static struct arm_pmu *kvm_pmu_probe_armpmu(void) if (event->pmu) { pmu = to_arm_pmu(event->pmu); - if (pmu->pmuver == 0 || + if (pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_NI || pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF) pmu = NULL; } |