diff options
| author | Wei Wang <wei.w.wang@intel.com> | 2014-11-05 10:53:43 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-07 15:44:00 +0100 |
| commit | 4114c27d450bef228be9c7b0c40a888e18a3a636 (patch) | |
| tree | 4bc1ec2876070095e191cab210fd2896fdd5ccdf /arch/x86/kvm/vmx.c | |
| parent | a2ae9df7c991eca6c1ee6f42dbb18701a64175c3 (diff) | |
KVM: x86: reset RVI upon system reset
A bug was reported as follows: when running Windows 7 32-bit guests on qemu-kvm,
sometimes the guests run into blue screen during reboot. The problem was that a
guest's RVI was not cleared when it rebooted. This patch has fixed the problem.
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Tested-by: Rongrong Liu <rongrongx.liu@intel.com>, Da Chun <ngugc@qq.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index d6e3ddace074..f9d56c1945de 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7419,6 +7419,9 @@ static void vmx_set_rvi(int vector) u16 status; u8 old; + if (vector == -1) + vector = 0; + status = vmcs_read16(GUEST_INTR_STATUS); old = (u8)status & 0xff; if ((u8)vector != old) { @@ -7430,22 +7433,23 @@ static void vmx_set_rvi(int vector) static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) { + if (!is_guest_mode(vcpu)) { + vmx_set_rvi(max_irr); + return; + } + if (max_irr == -1) return; /* - * If a vmexit is needed, vmx_check_nested_events handles it. + * In guest mode. If a vmexit is needed, vmx_check_nested_events + * handles it. */ - if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) + if (nested_exit_on_intr(vcpu)) return; - if (!is_guest_mode(vcpu)) { - vmx_set_rvi(max_irr); - return; - } - /* - * Fall back to pre-APICv interrupt injection since L2 + * Else, fall back to pre-APICv interrupt injection since L2 * is run without virtual interrupt delivery. */ if (!kvm_event_needs_reinjection(vcpu) && |