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KVM: x86/vPMU: Declare kvm_pmu->reprogram_pmi field using DECLARE_BITMAP 

Replace the explicit declaration of "u64 reprogram_pmi" with the generic
macro DECLARE_BITMAP for all possible appropriate number of bits.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Like Xu 2019-10-21 18:55:04 +08:00 committed by Paolo Bonzini
parent 30ce89acdf
commit 4be946728f
2 changed files with 6 additions and 11 deletions
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2
arch/x86/include/asm/kvm_host.h
View File

@ -467,7 +467,7 @@ struct kvm_pmu {
struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC];
struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED];
struct irq_work irq_work;
u64 reprogram_pmi;
DECLARE_BITMAP(reprogram_pmi, X86_PMC_IDX_MAX);
};
struct kvm_pmu_ops;

15
arch/x86/kvm/pmu.c
View File

@ -62,8 +62,7 @@ static void kvm_perf_overflow(struct perf_event *perf_event,
struct kvm_pmc *pmc = perf_event->overflow_handler_context;
struct kvm_pmu *pmu = pmc_to_pmu(pmc);
if (!test_and_set_bit(pmc->idx,
(unsigned long *)&pmu->reprogram_pmi)) {
if (!test_and_set_bit(pmc->idx, pmu->reprogram_pmi)) {
__set_bit(pmc->idx, (unsigned long *)&pmu->global_status);
kvm_make_request(KVM_REQ_PMU, pmc->vcpu);
}
@ -76,8 +75,7 @@ static void kvm_perf_overflow_intr(struct perf_event *perf_event,
struct kvm_pmc *pmc = perf_event->overflow_handler_context;
struct kvm_pmu *pmu = pmc_to_pmu(pmc);
if (!test_and_set_bit(pmc->idx,
(unsigned long *)&pmu->reprogram_pmi)) {
if (!test_and_set_bit(pmc->idx, pmu->reprogram_pmi)) {
__set_bit(pmc->idx, (unsigned long *)&pmu->global_status);
kvm_make_request(KVM_REQ_PMU, pmc->vcpu);
@ -137,7 +135,7 @@ static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type,
}
pmc->perf_event = event;
clear_bit(pmc->idx, (unsigned long*)&pmc_to_pmu(pmc)->reprogram_pmi);
clear_bit(pmc->idx, pmc_to_pmu(pmc)->reprogram_pmi);
}
void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel)
@ -253,16 +251,13 @@ EXPORT_SYMBOL_GPL(reprogram_counter);
void kvm_pmu_handle_event(struct kvm_vcpu *vcpu)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
u64 bitmask;
int bit;
bitmask = pmu->reprogram_pmi;
for_each_set_bit(bit, (unsigned long *)&bitmask, X86_PMC_IDX_MAX) {
for_each_set_bit(bit, pmu->reprogram_pmi, X86_PMC_IDX_MAX) {
struct kvm_pmc *pmc = kvm_x86_ops->pmu_ops->pmc_idx_to_pmc(pmu, bit);
if (unlikely(!pmc || !pmc->perf_event)) {
clear_bit(bit, (unsigned long *)&pmu->reprogram_pmi);
clear_bit(bit, pmu->reprogram_pmi);
continue;
}