KVM: x86/pmu: Move reprogram_counters() to pmu.h

Move reprogram_counters() out of Intel specific PMU code and into pmu.h so
that it can be used to implement AMD PMU v2 support.

No functional change intended.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Like Xu <likexu@tencent.com>
[sean: rewrite changelog]
Link: https://lore.kernel.org/r/20230603011058.1038821-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: Like Xu

arch/x86/kvm/pmu.h

@@ -201,6 +201,18 @@ static inline void kvm_pmu_request_counter_reprogram(struct kvm_pmc *pmc)
 	kvm_make_request(KVM_REQ_PMU, pmc->vcpu);
 }
 
+static inline void reprogram_counters(struct kvm_pmu *pmu, u64 diff)
+{
+	int bit;
+
+	if (!diff)
+		return;
+
+	for_each_set_bit(bit, (unsigned long *)&diff, X86_PMC_IDX_MAX)
+		set_bit(bit, pmu->reprogram_pmi);
+	kvm_make_request(KVM_REQ_PMU, pmu_to_vcpu(pmu));
+}
+
 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);

arch/x86/kvm/vmx/pmu_intel.c

@@ -73,18 +73,6 @@ static struct kvm_pmc *intel_pmc_idx_to_pmc(struct kvm_pmu *pmu, int pmc_idx)
 	}
 }
 
-static void reprogram_counters(struct kvm_pmu *pmu, u64 diff)
-{
-	int bit;
-
-	if (!diff)
-		return;
-
-	for_each_set_bit(bit, (unsigned long *)&diff, X86_PMC_IDX_MAX)
-		set_bit(bit, pmu->reprogram_pmi);
-	kvm_make_request(KVM_REQ_PMU, pmu_to_vcpu(pmu));
-}
-
 static bool intel_hw_event_available(struct kvm_pmc *pmc)
 {
 	struct kvm_pmu *pmu = pmc_to_pmu(pmc);