diff mbox series

[v2,11/54] KVM: x86/pmu: Register guest pmi handler for emulated PMU

Message ID 20240506053020.3911940-12-mizhang@google.com (mailing list archive)
State New
Headers show
Series Mediated Passthrough vPMU 2.0 for x86 | expand

Commit Message

Mingwei Zhang May 6, 2024, 5:29 a.m. UTC 
From: Xiong Zhang <xiong.y.zhang@linux.intel.com>

Add function to register/unregister PMI handler at KVM module
initialization and destroy. This allows the host PMU with passthough
capability enabled switch PMI handler at PMU context switch.

Signed-off-by: Xiong Zhang <xiong.y.zhang@linux.intel.com>
---
 arch/x86/kvm/x86.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ebcc12d1e1de..51b5a88222ef 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -13887,6 +13887,16 @@  int kvm_sev_es_string_io(struct kvm_vcpu *vcpu, unsigned int size,
 }
 EXPORT_SYMBOL_GPL(kvm_sev_es_string_io);
 
+static void kvm_handle_guest_pmi(void)
+{
+	struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
+
+	if (WARN_ON_ONCE(!vcpu))
+		return;
+
+	kvm_make_request(KVM_REQ_PMI, vcpu);
+}
+
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_entry);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio);
@@ -13921,12 +13931,14 @@  static int __init kvm_x86_init(void)
 {
 	kvm_mmu_x86_module_init();
 	mitigate_smt_rsb &= boot_cpu_has_bug(X86_BUG_SMT_RSB) && cpu_smt_possible();
+	x86_set_kvm_irq_handler(KVM_GUEST_PMI_VECTOR, kvm_handle_guest_pmi);
 	return 0;
 }
 module_init(kvm_x86_init);
 
 static void __exit kvm_x86_exit(void)
 {
+	x86_set_kvm_irq_handler(KVM_GUEST_PMI_VECTOR, NULL);
 	WARN_ON_ONCE(static_branch_unlikely(&kvm_has_noapic_vcpu));
 }
 module_exit(kvm_x86_exit);