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[RFC,33/41] KVM: x86/pmu: Make check_pmu_event_filter() an exported function

Message ID 20240126085444.324918-34-xiong.y.zhang@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86/pmu: Introduce passthrough vPM | expand

Commit Message

Xiong Zhang Jan. 26, 2024, 8:54 a.m. UTC 
From: Mingwei Zhang <mizhang@google.com>

Make check_pmu_event_filter() exported to usable by vendor modules like
kvm_intel. This is because passthrough PMU intercept the guest writes to
event selectors and directly do the event filter checking inside the vendor
specific set_msr() instead of deferring to the KVM_REQ_PMU handler.

Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
 arch/x86/kvm/pmu.c | 3 ++-
 arch/x86/kvm/pmu.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index afc9f7eb3a6b..e7ad97734705 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -356,7 +356,7 @@  static bool is_fixed_event_allowed(struct kvm_x86_pmu_event_filter *filter,
 	return true;
 }
 
-static bool check_pmu_event_filter(struct kvm_pmc *pmc)
+bool check_pmu_event_filter(struct kvm_pmc *pmc)
 {
 	struct kvm_x86_pmu_event_filter *filter;
 	struct kvm *kvm = pmc->vcpu->kvm;
@@ -370,6 +370,7 @@  static bool check_pmu_event_filter(struct kvm_pmc *pmc)
 
 	return is_fixed_event_allowed(filter, pmc->idx);
 }
+EXPORT_SYMBOL_GPL(check_pmu_event_filter);
 
 static bool pmc_event_is_allowed(struct kvm_pmc *pmc)
 {
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index a4c0b2e2c24b..6f44fe056368 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -292,6 +292,7 @@  void kvm_pmu_trigger_event(struct kvm_vcpu *vcpu, u64 perf_hw_id);
 void kvm_pmu_passthrough_pmu_msrs(struct kvm_vcpu *vcpu);
 void kvm_pmu_save_pmu_context(struct kvm_vcpu *vcpu);
 void kvm_pmu_restore_pmu_context(struct kvm_vcpu *vcpu);
+bool check_pmu_event_filter(struct kvm_pmc *pmc);
 
 bool is_vmware_backdoor_pmc(u32 pmc_idx);