From 152ff9be2ed11e76ed3014b94eacdd6bc9275518 Mon Sep 17 00:00:00 2001 From: Joerg Roedel <jroedel@lemmy.amd.com> Date: Thu, 6 Dec 2007 15:46:52 +0100 Subject: KVM: SVM: Emulate read/write access to cr8 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 <joerg.roedel@amd.com> Signed-off-by: Markus Rechberger <markus.rechberger@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com> --- drivers/kvm/x86.c | 5 +++++ 1 file changed, 5 insertions(+) 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); } -- cgit v1.1