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KVM: nVMX: Fix conditions for NMI injection

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The logic for checking if interrupts can be injected has to be applied
also on NMIs. The difference is that if NMI interception is on these
events are consumed and blocked by the VM exit.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka 2013-04-14 21:04:26 +02:00 committed by Gleb Natapov
parent 2505dc9fad
commit ea8ceb8354
1 changed files with 26 additions and 0 deletions
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26
arch/x86/kvm/vmx.c
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@ -4392,6 +4392,12 @@ static bool nested_exit_on_intr(struct kvm_vcpu *vcpu)
PIN_BASED_EXT_INTR_MASK;
}
static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
{
return get_vmcs12(vcpu)->pin_based_vm_exec_control &
PIN_BASED_NMI_EXITING;
}
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
@ -4517,6 +4523,26 @@ static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
{
if (is_guest_mode(vcpu)) {
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
if (to_vmx(vcpu)->nested.nested_run_pending)
return 0;
if (nested_exit_on_nmi(vcpu)) {
nested_vmx_vmexit(vcpu);
vmcs12->vm_exit_reason = EXIT_REASON_EXCEPTION_NMI;
vmcs12->vm_exit_intr_info = NMI_VECTOR |
INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK;
/*
* The NMI-triggered VM exit counts as injection:
* clear this one and block further NMIs.
*/
vcpu->arch.nmi_pending = 0;
vmx_set_nmi_mask(vcpu, true);
return 0;
}
}
if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
return 0;