On 10/14/2009 01:06 AM, Jan Kiszka wrote:
This plugs an NMI-related hole in the VCPU synchronization between
kernel and user space. So far, neither pending NMIs nor the inhibit NMI
mask was properly read/set which was able to cause problems on
vmsave/restore, live migration and system reset. Fix it by making use
of the new VCPU substate interface.
+struct kvm_nmi_state {
+ __u8 pending;
+ __u8 masked;
+ __u8 pad1[2];
+};
Best to be conservative and use 64-bit alignment. Who knows what we
might put after this someday.
@@ -513,6 +513,8 @@ struct kvm_x86_ops {
unsigned char *hypercall_addr);
void (*set_irq)(struct kvm_vcpu *vcpu);
void (*set_nmi)(struct kvm_vcpu *vcpu);
+ int (*get_nmi_mask)(struct kvm_vcpu *vcpu);
+ void (*set_nmi_mask)(struct kvm_vcpu *vcpu, int masked);
Prefer bool for booleans, please.
Needs a KVM_CAP as well.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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