KVM: Avoid spurious execeptions after setting registers

Clear pending exceptions when setting new register values. This avoids
spurious exceptions after restoring a vcpu state or after
reset-on-triple-fault.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/x86/kvm/x86.c

@@ -3022,6 +3022,8 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 
 	kvm_x86_ops->decache_regs(vcpu);
 
+	vcpu->arch.exception.pending = false;
+
 	vcpu_put(vcpu);
 
 	return 0;