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| author | Reiji Watanabe <reijiw@google.com> | 2023-10-20 23:40:42 +0200 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-10-25 00:59:29 +0200 |
| commit | 427733579744ef22ee6d0da9907560d79d937458 (patch) | |
| tree | 5adb3b554a7332cdbf78c9429d2ce5ed97a583e5 /include/kvm | |
| parent | KVM: arm64: PMU: Introduce helpers to set the guest's PMU (diff) | |
| download | linux-427733579744ef22ee6d0da9907560d79d937458.tar.xz linux-427733579744ef22ee6d0da9907560d79d937458.zip | |
KVM: arm64: Select default PMU in KVM_ARM_VCPU_INIT handler
Future changes to KVM's sysreg emulation will rely on having a valid PMU
instance to determine the number of implemented counters (PMCR_EL0.N).
This is earlier than when userspace is expected to modify the vPMU
device attributes, where the default is selected today.
Select the default PMU when handling KVM_ARM_VCPU_INIT such that it is
available in time for sysreg emulation.
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Co-developed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Link: https://lore.kernel.org/r/20231020214053.2144305-3-rananta@google.com
[Oliver: rewrite changelog]
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_pmu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 31029f4f7be8..b80c75d80886 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -101,6 +101,7 @@ void kvm_vcpu_pmu_resync_el0(void); }) u8 kvm_arm_pmu_get_pmuver_limit(void); +int kvm_arm_set_default_pmu(struct kvm *kvm); #else struct kvm_pmu { @@ -174,6 +175,11 @@ static inline u8 kvm_arm_pmu_get_pmuver_limit(void) } static inline void kvm_vcpu_pmu_resync_el0(void) {} +static inline int kvm_arm_set_default_pmu(struct kvm *kvm) +{ + return -ENODEV; +} + #endif #endif |