diff options
| author | Yanfei Xu <yanfei.xu@intel.com> | 2022-05-23 22:08:21 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 05:18:27 -0400 |
| commit | ffd1925a596ce68bed7d81c61cb64bc35f788a9d (patch) | |
| tree | bd58ed1a829eec226ffcb569e943fe448e453086 | |
| parent | 366d4a12cdcf3d83c8162ff6e0046c123567c754 (diff) | |
KVM: x86: Fix the intel_pt PMI handling wrongly considered from guest
When kernel handles the vm-exit caused by external interrupts and NMI,
it always sets kvm_intr_type to tell if it's dealing an IRQ or NMI. For
the PMI scenario, it could be IRQ or NMI.
However, intel_pt PMIs are only generated for HARDWARE perf events, and
HARDWARE events are always configured to generate NMIs. Use
kvm_handling_nmi_from_guest() to precisely identify if the intel_pt PMI
came from the guest; this avoids false positives if an intel_pt PMI/NMI
arrives while the host is handling an unrelated IRQ VM-Exit.
Fixes: db215756ae59 ("KVM: x86: More precisely identify NMI from guest when handling PMI")
Signed-off-by: Yanfei Xu <yanfei.xu@intel.com>
Message-Id: <20220523140821.1345605-1-yanfei.xu@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 3e271495181e..f5aeade623d6 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7853,7 +7853,7 @@ static unsigned int vmx_handle_intel_pt_intr(void) struct kvm_vcpu *vcpu = kvm_get_running_vcpu(); /* '0' on failure so that the !PT case can use a RET0 static call. */ - if (!kvm_arch_pmi_in_guest(vcpu)) + if (!vcpu || !kvm_handling_nmi_from_guest(vcpu)) return 0; kvm_make_request(KVM_REQ_PMI, vcpu); |