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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-04-29 16:46:42 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-05-03 03:17:38 +0200 |
| commit | 03b28f8133165dbe4cd922054d599e26b8119508 (patch) | |
| tree | 990c42340b746bf2fa527f1febc109826f981029 /arch/x86/kvm/svm.c | |
| parent | KVM: PPC: Book3S: Add API for in-kernel XICS emulation (diff) | |
| download | linux-03b28f8133165dbe4cd922054d599e26b8119508.tar.xz linux-03b28f8133165dbe4cd922054d599e26b8119508.zip | |
KVM: x86: Account for failing enable_irq_window for NMI window request
With VMX, enable_irq_window can now return -EBUSY, in which case an
immediate exit shall be requested before entering the guest. Account for
this also in enable_nmi_window which uses enable_irq_window in absence
of vnmi support, e.g.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 7f896cbe717f..3421d5a92c06 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3649,13 +3649,13 @@ static int enable_irq_window(struct kvm_vcpu *vcpu) return 0; } -static void enable_nmi_window(struct kvm_vcpu *vcpu) +static int enable_nmi_window(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) == HF_NMI_MASK) - return; /* IRET will cause a vm exit */ + return 0; /* IRET will cause a vm exit */ /* * Something prevents NMI from been injected. Single step over possible @@ -3664,6 +3664,7 @@ static void enable_nmi_window(struct kvm_vcpu *vcpu) svm->nmi_singlestep = true; svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); update_db_bp_intercept(vcpu); + return 0; } static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) |