[PATCH] KVM: Fix IA32e Windows can't boot issue

From: Sheng Yang <sheng@linux.intel.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
	kvm@vger.kernel.org, Sheng Yang <sheng@linux.intel.com>
Subject: [PATCH] KVM: Fix IA32e Windows can't boot issue
Date: Wed,  1 Jul 2009 16:07:51 +0800	[thread overview]
Message-ID: <1246435671-25485-1-git-send-email-sheng@linux.intel.com> (raw)

One typo in commit: "KVM: convert custom marker based tracing to
event traces" caused:

set_cr8: #GP, reserved bits 0x7f

when try to boot up IA32e Windows guest.

One value has been written to R8 instead of specific register, then the
value of specific register can be invalid as CR8. Guest RMW it, then got
trouble.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 arch/x86/kvm/vmx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 119fa47..3a75db3 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2903,7 +2903,7 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 			return 1;
 		case 8:
 			val = kvm_get_cr8(vcpu);
-			kvm_register_write(vcpu, cr, val);
+			kvm_register_write(vcpu, reg, val);
 			trace_kvm_cr_read(cr, val);
 			skip_emulated_instruction(vcpu);
 			return 1;
-- 
1.5.4.5

