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| author | Oliver Upton <oliver.upton@linux.dev> | 2023-10-30 23:24:07 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-10-30 23:24:19 +0300 |
| commit | 123f42f0ad6815014f54d0cc6eb9039c46ee2907 (patch) | |
| tree | de36850d1b225790272b9690650f18d6384830a5 /include | |
| parent | 53ce49ea75602b51a1feb3844d535ced42b2d8c2 (diff) | |
| parent | 62708be351fe7b06be6f6fd30e95c94095bf21d3 (diff) | |
| download | linux-123f42f0ad6815014f54d0cc6eb9039c46ee2907.tar.xz | |
Merge branch kvm-arm64/pmu_pmcr_n into kvmarm/next
* kvm-arm64/pmu_pmcr_n:
: User-defined PMC limit, courtesy Raghavendra Rao Ananta
:
: Certain VMMs may want to reserve some PMCs for host use while running a
: KVM guest. This was a bit difficult before, as KVM advertised all
: supported counters to the guest. Userspace can now limit the number of
: advertised PMCs by writing to PMCR_EL0.N, as KVM's sysreg and PMU
: emulation enforce the specified limit for handling guest accesses.
KVM: selftests: aarch64: vPMU test for validating user accesses
KVM: selftests: aarch64: vPMU register test for unimplemented counters
KVM: selftests: aarch64: vPMU register test for implemented counters
KVM: selftests: aarch64: Introduce vpmu_counter_access test
tools: Import arm_pmuv3.h
KVM: arm64: PMU: Allow userspace to limit PMCR_EL0.N for the guest
KVM: arm64: Sanitize PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR} before first run
KVM: arm64: Add {get,set}_user for PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR}
KVM: arm64: PMU: Set PMCR_EL0.N for vCPU based on the associated PMU
KVM: arm64: PMU: Add a helper to read a vCPU's PMCR_EL0
KVM: arm64: Select default PMU in KVM_ARM_VCPU_INIT handler
KVM: arm64: PMU: Introduce helpers to set the guest's PMU
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'include')
| -rw-r--r-- | include/kvm/arm_pmu.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 4df71290b676..4b9d8fb393a8 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -13,7 +13,6 @@ #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) #if IS_ENABLED(CONFIG_HW_PERF_EVENTS) && IS_ENABLED(CONFIG_KVM) - struct kvm_pmc { u8 idx; /* index into the pmu->pmc array */ struct perf_event *perf_event; @@ -63,6 +62,7 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, u64 select_idx); +void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu); int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, @@ -102,7 +102,10 @@ void kvm_vcpu_pmu_resync_el0(void); u8 kvm_arm_pmu_get_pmuver_limit(void); u64 kvm_pmu_evtyper_mask(struct kvm *kvm); +int kvm_arm_set_default_pmu(struct kvm *kvm); +u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm); +u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu); #else struct kvm_pmu { }; @@ -169,6 +172,7 @@ static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) 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) {} +static inline void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu) {} static inline u8 kvm_arm_pmu_get_pmuver_limit(void) { return 0; @@ -179,6 +183,21 @@ static inline u64 kvm_pmu_evtyper_mask(struct kvm *kvm) } static inline void kvm_vcpu_pmu_resync_el0(void) {} +static inline int kvm_arm_set_default_pmu(struct kvm *kvm) +{ + return -ENODEV; +} + +static inline u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm) +{ + return 0; +} + +static inline u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu) +{ + return 0; +} + #endif #endif |