KVM: x86/pmu: Use only the uniform interface reprogram_counter()

Since reprogram_counter(), reprogram_{gp, fixed}_counter() currently have
the same incoming parameter "struct kvm_pmc *pmc", the callers can simplify
the conetxt by using uniformly exported interface, which makes reprogram_
{gp, fixed}_counter() static and eliminates EXPORT_SYMBOL_GPL.
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220518132512.37864-8-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/pmu.c

@@ -283,7 +283,7 @@ static bool check_pmu_event_filter(struct kvm_pmc *pmc)
 	return allow_event;
 }
 
-void reprogram_gp_counter(struct kvm_pmc *pmc)
+static void reprogram_gp_counter(struct kvm_pmc *pmc)
 {
 	u64 config;
 	u32 type = PERF_TYPE_RAW;
@@ -325,9 +325,8 @@ void reprogram_gp_counter(struct kvm_pmc *pmc)
 			      !(eventsel & ARCH_PERFMON_EVENTSEL_OS),
 			      eventsel & ARCH_PERFMON_EVENTSEL_INT);
 }
-EXPORT_SYMBOL_GPL(reprogram_gp_counter);
 
-void reprogram_fixed_counter(struct kvm_pmc *pmc)
+static void reprogram_fixed_counter(struct kvm_pmc *pmc)
 {
 	struct kvm_pmu *pmu = pmc_to_pmu(pmc);
 	int idx = pmc->idx - INTEL_PMC_IDX_FIXED;
@@ -355,7 +354,6 @@ void reprogram_fixed_counter(struct kvm_pmc *pmc)
 			      !(en_field & 0x1), /* exclude kernel */
 			      pmi);
 }
-EXPORT_SYMBOL_GPL(reprogram_fixed_counter);
 
 void reprogram_counter(struct kvm_pmc *pmc)
 {

arch/x86/kvm/pmu.h

@@ -173,8 +173,6 @@ static inline void kvm_init_pmu_capability(void)
 					     KVM_PMC_MAX_FIXED);
 }
 
-void reprogram_gp_counter(struct kvm_pmc *pmc);
-void reprogram_fixed_counter(struct kvm_pmc *pmc);
 void reprogram_counter(struct kvm_pmc *pmc);
 
 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);

arch/x86/kvm/svm/pmu.c

@@ -288,7 +288,7 @@ static int amd_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		data &= ~pmu->reserved_bits;
 		if (data != pmc->eventsel) {
 			pmc->eventsel = data;
-			reprogram_gp_counter(pmc);
+			reprogram_counter(pmc);
 		}
 		return 0;
 	}

arch/x86/kvm/vmx/pmu_intel.c

@@ -52,7 +52,7 @@ static void reprogram_fixed_counters(struct kvm_pmu *pmu, u64 data)
 		pmc = get_fixed_pmc(pmu, MSR_CORE_PERF_FIXED_CTR0 + i);
 
 		__set_bit(INTEL_PMC_IDX_FIXED + i, pmu->pmc_in_use);
-		reprogram_fixed_counter(pmc);
+		reprogram_counter(pmc);
 	}
 }
 
@@ -493,7 +493,7 @@ static int intel_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 				reserved_bits ^= HSW_IN_TX_CHECKPOINTED;
 			if (!(data & reserved_bits)) {
 				pmc->eventsel = data;
-				reprogram_gp_counter(pmc);
+				reprogram_counter(pmc);
 				return 0;
 			}
 		} else if (intel_pmu_handle_lbr_msrs_access(vcpu, msr_info, false))