linux-kernel - [PATCH 08/12] KVM: SVM: Add clean-bit for DR6 and DR7

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Date:	Fri, 3 Dec 2010 11:45:55 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
CC:	<kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 08/12] KVM: SVM: Add clean-bit for DR6 and DR7

This patch implements the clean-bit for the dr6 and dr7
debug registers in the vmcb.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kvm/svm.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 1b35969..0517505 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -193,6 +193,7 @@ enum {
 	VMCB_INTR,	 /* int_ctl, int_vector */
 	VMCB_NPT,        /* npt_en, nCR3, gPAT */
 	VMCB_CR,	 /* CR0, CR3, CR4, EFER */
+	VMCB_DR,         /* DR6, DR7 */
 	VMCB_DIRTY_MAX,
 };
 
@@ -1484,6 +1485,8 @@ static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
 	else
 		svm->vmcb->save.dr7 = vcpu->arch.dr7;
 
+	mark_dirty(svm->vmcb, VMCB_DR);
+
 	update_db_intercept(vcpu);
 }
 
@@ -1506,6 +1509,7 @@ static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
 	struct vcpu_svm *svm = to_svm(vcpu);
 
 	svm->vmcb->save.dr7 = value;
+	mark_dirty(svm->vmcb, VMCB_DR);
 }
 
 static int pf_interception(struct vcpu_svm *svm)
-- 
1.7.1


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