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| author | Marc Zyngier <maz@kernel.org> | 2022-11-13 19:38:29 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-19 15:56:39 +0300 |
| commit | 11af4c37165e36a6090172ded5d06acdf15206da (patch) | |
| tree | 163f233bfeb741f0661e30810cadbcf27f467767 /include/kvm | |
| parent | d82e0dfdfda73f91e7282e1083a2cd7cd366ea87 (diff) | |
| download | linux-11af4c37165e36a6090172ded5d06acdf15206da.tar.xz | |
KVM: arm64: PMU: Implement PMUv3p5 long counter support
PMUv3p5 (which is mandatory with ARMv8.5) comes with some extra
features:
- All counters are 64bit
- The overflow point is controlled by the PMCR_EL0.LP bit
Add the required checks in the helpers that control counter
width and overflow, as well as the sysreg handling for the LP
bit. A new kvm_pmu_is_3p5() helper makes it easy to spot the
PMUv3p5 specific handling.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221113163832.3154370-14-maz@kernel.org
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_pmu.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 812f729c9108..628775334d5e 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -89,6 +89,12 @@ void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu); vcpu->arch.pmu.events = *kvm_get_pmu_events(); \ } while (0) +/* + * Evaluates as true when emulating PMUv3p5, and false otherwise. + */ +#define kvm_pmu_is_3p5(vcpu) \ + (vcpu->kvm->arch.dfr0_pmuver.imp >= ID_AA64DFR0_EL1_PMUVer_V3P5) + u8 kvm_arm_pmu_get_pmuver_limit(void); #else @@ -153,6 +159,7 @@ static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) } #define kvm_vcpu_has_pmu(vcpu) ({ false; }) +#define kvm_pmu_is_3p5(vcpu) ({ false; }) static inline void kvm_pmu_update_vcpu_events(struct kvm_vcpu *vcpu) {} static inline void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) {} static inline void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu) {} |