diff options
| author | Oliver Upton <oliver.upton@linux.dev> | 2025-03-05 12:26:33 -0800 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-03-11 12:54:29 -0700 |
| commit | a38b67d1518331a4147c52c4fa563846ea0969f9 (patch) | |
| tree | 61e203bb4f9c30b457b7a55faf289de4bb4aeefe /include | |
| parent | 6f34024d185e2fa6636c660431c4595a6529328d (diff) | |
KVM: arm64: Drop kvm_arm_pmu_available static key
With the PMUv3 cpucap, kvm_arm_pmu_available is no longer used in the
hot path of guest entry/exit. On top of that, guest support for PMUv3
may not correlate with host support for the feature, e.g. on IMPDEF
hardware.
Throw out the static key and just inspect the list of PMUs to determine
if PMUv3 is supported for KVM guests.
Tested-by: Janne Grunau <j@jannau.net>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250305202641.428114-7-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'include')
| -rw-r--r-- | include/kvm/arm_pmu.h | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 3a8edd78240f..58fc7f932b3f 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -37,13 +37,7 @@ struct arm_pmu_entry { struct arm_pmu *arm_pmu; }; -DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available); - -static __always_inline bool kvm_arm_support_pmu_v3(void) -{ - return static_branch_likely(&kvm_arm_pmu_available); -} - +bool kvm_supports_guest_pmuv3(void); #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); @@ -102,7 +96,7 @@ void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu); struct kvm_pmu { }; -static inline bool kvm_arm_support_pmu_v3(void) +static inline bool kvm_supports_guest_pmuv3(void) { return false; } |