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KVM: arm/arm64: Extract duplicated code to own function 

Let's reduce code duplication by extracting common code to its own
function.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Andrew Murray 2019-06-17 20:01:02 +01:00 committed by Marc Zyngier
parent 418e5ca88c
commit 6f4d2a0b0b
1 changed files with 16 additions and 12 deletions
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28
virt/kvm/arm/pmu.c
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@ -53,6 +53,19 @@ void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val)
__vcpu_sys_reg(vcpu, reg) += (s64)val - kvm_pmu_get_counter_value(vcpu, select_idx);
}
/**
* kvm_pmu_release_perf_event - remove the perf event
* @pmc: The PMU counter pointer
*/
static void kvm_pmu_release_perf_event(struct kvm_pmc *pmc)
{
if (pmc->perf_event) {
perf_event_disable(pmc->perf_event);
perf_event_release_kernel(pmc->perf_event);
pmc->perf_event = NULL;
}
}
/**
* kvm_pmu_stop_counter - stop PMU counter
* @pmc: The PMU counter pointer
@ -68,9 +81,7 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
reg = (pmc->idx == ARMV8_PMU_CYCLE_IDX)
? PMCCNTR_EL0 : PMEVCNTR0_EL0 + pmc->idx;
__vcpu_sys_reg(vcpu, reg) = counter;
perf_event_disable(pmc->perf_event);
perf_event_release_kernel(pmc->perf_event);
pmc->perf_event = NULL;
kvm_pmu_release_perf_event(pmc);
}
}
@ -101,15 +112,8 @@ void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu)
int i;
struct kvm_pmu *pmu = &vcpu->arch.pmu;
for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) {
struct kvm_pmc *pmc = &pmu->pmc[i];
if (pmc->perf_event) {
perf_event_disable(pmc->perf_event);
perf_event_release_kernel(pmc->perf_event);
pmc->perf_event = NULL;
}
}
for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++)
kvm_pmu_release_perf_event(&pmu->pmc[i]);
}
u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)