KVM: VMX: handle PML full VMEXIT that occurs during event delivery

commit b244c9fc251e14a083a1cbf04bef10bd99303a76 upstream.

With PML enabled, guest will shut down if a PML full VMEXIT occurs during
event delivery. According to Intel SDM 27.2.3, PML full VMEXIT can occur when
event is being delivered through IDT, so KVM should not exit to user space
with error. Instead, it should let EXIT_REASON_PML_FULL go through and the
event will be re-injected on the next VMENTRY.

Signed-off-by: Lei Cao <lei.cao@stratus.com>
Fixes: 843e4330573c ("KVM: VMX: Add PML support in VMX")
[Shortened the summary and Cc'd stable.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 64a79f271276a025ea76759189cddfbe967ae1ed..85bf9f364d59adc22ea5ceddce6166ae6f2fc8c3 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8224,6 +8224,7 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu)
        if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
                        (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
                        exit_reason != EXIT_REASON_EPT_VIOLATION &&
+                       exit_reason != EXIT_REASON_PML_FULL &&
                        exit_reason != EXIT_REASON_TASK_SWITCH)) {
                vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
                vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;