Commit e5314067 authored Dec 06, 2007 by Avi Kivity

KVM: VMX: Avoid exit when setting cr8 if the local apic is in the kernel



With apic in userspace, we must exit to userspace after a cr8 write in order
to update the tpr.  But if the apic is in the kernel, the exit is unnecessary.

Noticed by Joerg Roedel.

Signed-off-by: Avi Kivity <avi@qumranet.com>

parent e934c9c1

drivers/kvm/vmx.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1973,6 +1973,8 @@ static int handle_cr(struct kvm_vcpu vcpu, struct kvm_run kvm_run)
		vcpu_load_rsp_rip(vcpu);
		set_cr8(vcpu, vcpu->regs[reg]);
		skip_emulated_instruction(vcpu);
		if (irqchip_in_kernel(vcpu->kvm))
		return 1;
		kvm_run->exit_reason = KVM_EXIT_SET_TPR;
		return 0;
		};