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| author | Jan Kiszka <jan.kiszka@web.de> | 2009-11-12 01:04:25 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-12-03 09:32:25 +0200 |
| commit | 3cfc3092f40bc37c57ba556cfd8de4218f2135ab (patch) | |
| tree | 562d61febfe7d3c99ea08e376b3f3c016cff613c /arch/x86/kvm/svm.c | |
| parent | 65ac7264043740572ba804edca03c374d70427c9 (diff) | |
| download | linux-3cfc3092f40bc37c57ba556cfd8de4218f2135ab.tar.bz2 | |
KVM: x86: Add KVM_GET/SET_VCPU_EVENTS
This new IOCTL exports all yet user-invisible states related to
exceptions, interrupts, and NMIs. Together with appropriate user space
changes, this fixes sporadic problems of vmsave/restore, live migration
and system reset.
[avi: future-proof abi by adding a flags field]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 34b700f9e498..3de0b37ec038 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2499,6 +2499,26 @@ static int svm_nmi_allowed(struct kvm_vcpu *vcpu) !(svm->vcpu.arch.hflags & HF_NMI_MASK); } +static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) +{ + struct vcpu_svm *svm = to_svm(vcpu); + + return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); +} + +static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) +{ + struct vcpu_svm *svm = to_svm(vcpu); + + if (masked) { + svm->vcpu.arch.hflags |= HF_NMI_MASK; + svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET); + } else { + svm->vcpu.arch.hflags &= ~HF_NMI_MASK; + svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET); + } +} + static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); @@ -2946,6 +2966,8 @@ static struct kvm_x86_ops svm_x86_ops = { .queue_exception = svm_queue_exception, .interrupt_allowed = svm_interrupt_allowed, .nmi_allowed = svm_nmi_allowed, + .get_nmi_mask = svm_get_nmi_mask, + .set_nmi_mask = svm_set_nmi_mask, .enable_nmi_window = enable_nmi_window, .enable_irq_window = enable_irq_window, .update_cr8_intercept = update_cr8_intercept, |