KVM: Communicate cr8 changes to userspace

This allows running 64-bit Windows.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index a9b4cb5..cd999c0 100644 (file)
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1831,7 +1831,8 @@ 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);
-                       return 1;
+                       kvm_run->exit_reason = KVM_EXIT_SET_TPR;
+                       return 0;
                };
                break;
        case 2: /* clts */

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 91a446f..1d5a49c 100644 (file)
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -46,6 +46,7 @@ enum kvm_exit_reason {
        KVM_EXIT_SHUTDOWN         = 8,
        KVM_EXIT_FAIL_ENTRY       = 9,
        KVM_EXIT_INTR             = 10,
+       KVM_EXIT_SET_TPR          = 11
 };
 
 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */