From: Xiong Zhang <xiong.y.zhang@xxxxxxxxxxxxxxx>
Add function to register/unregister guest KVM PMI handler at KVM module
initialization and destroy. This allows the host PMU with passthough
capability enabled can switch PMI handler at PMU context switch.
Signed-off-by: Xiong Zhang <xiong.y.zhang@xxxxxxxxxxxxxxx>
Tested-by: Yongwei Ma <yongwei.ma@xxxxxxxxx>
Signed-off-by: Mingwei Zhang <mizhang@xxxxxxxxxx>
---
arch/x86/kvm/x86.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8c9e4281d978..f1d589c07068 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -13946,6 +13946,16 @@ 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);
@@ -13980,12 +13990,14 @@ 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);
--
2.46.0.rc1.232.g9752f9e123-goog
