From: Joerg Roedel <[EMAIL PROTECTED]>
This patch adds code to emulate the access to the cr8 register to the x86
instruction emulator in kvm. This is needed on svm, where there is no
hardware decode for control register access.
Signed-off-by: Joerg Roedel <[EMAIL PROTECTED]>
Signed-off-by: Markus Rechberger <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/x86.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 6deb052..9db4e32 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -2236,6 +2236,8 @@ unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int
cr)
return vcpu->cr3;
case 4:
return vcpu->cr4;
+ case 8:
+ return get_cr8(vcpu);
default:
vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
return 0;
@@ -2259,6 +2261,9 @@ void realmode_set_cr(struct kvm_vcpu *vcpu, int cr,
unsigned long val,
case 4:
set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
break;
+ case 8:
+ set_cr8(vcpu, val & 0xfUL);
+ break;
default:
vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
}
--
1.5.3.7
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