KVM: x86: Inject PMI for KVM guest

Inject a PMI for KVM guest when Intel PT working
in Host-Guest mode and Guest ToPA entry memory buffer
was completely filled.

Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6c27d224f744..cedd396e3003 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6839,10 +6839,20 @@ static unsigned long kvm_get_guest_ip(void)
         return ip;
 }
 
+static void kvm_handle_intel_pt_intr(void)
+{
+        struct kvm_vcpu *vcpu = __this_cpu_read(current_vcpu);
+
+        kvm_make_request(KVM_REQ_PMI, vcpu);
+        __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
+                        (unsigned long *)&vcpu->arch.pmu.global_status);
+}
+
 static struct perf_guest_info_callbacks kvm_guest_cbs = {
         .is_in_guest            = kvm_is_in_guest,
         .is_user_mode           = kvm_is_user_mode,
         .get_guest_ip           = kvm_get_guest_ip,
+        .handle_intel_pt_intr   = kvm_handle_intel_pt_intr,
 };
 
 static void kvm_set_mmio_spte_mask(void)