Gleb Natapov wrote:
kvm_vcpu_block() unhalts vpu on an interrupt/timer without checking
if interrupt window is actually opened.
+static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb *vmcb = svm->vmcb;
+ return (vmcb->save.rflags & X86_EFLAGS_IF) &&
+ !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
+ (svm->vcpu.arch.hflags & HF_GIF_MASK);
+}
+
+static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
+{
+ vmx_update_window_states(vcpu);
+ return vcpu->arch.interrupt_window_open;
+}
+
static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
}
+
+int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
+{
+ return kvm_x86_ops->interrupt_allowed(vcpu);
+}
If the guest enables interrupts but sets tpr/cr8 to block interrupts,
we'll spin (like we do now).
So I think this should be called kvm_arch_can_accept_interrupt() and
take tpr into account.
--
error compiling committee.c: too many arguments to function
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