linux-kernel - [PATCH 02/12] KVM: SVM: Add clean-bit for intercetps, tsc-offset and pause filter count

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Date:	Fri, 3 Dec 2010 11:45:49 +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 02/12] KVM: SVM: Add clean-bit for intercetps, tsc-offset and pause filter count

This patch adds the clean-bit for intercepts-vectors, the
TSC offset and the pause-filter count to the appropriate
places. The IO and MSR permission bitmaps are not subject to
this bit.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kvm/svm.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 3ee59b0..d8058c9 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -186,6 +186,8 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
 				      bool has_error_code, u32 error_code);
 
 enum {
+	VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
+			    pause filter count */
 	VMCB_DIRTY_MAX,
 };
 
@@ -217,6 +219,8 @@ static void recalc_intercepts(struct vcpu_svm *svm)
 	struct vmcb_control_area *c, *h;
 	struct nested_state *g;
 
+	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+
 	if (!is_guest_mode(&svm->vcpu))
 		return;
 
@@ -854,6 +858,8 @@ static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
 	}
 
 	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
+
+	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
 }
 
 static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
@@ -863,6 +869,7 @@ static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
 	svm->vmcb->control.tsc_offset += adjustment;
 	if (is_guest_mode(vcpu))
 		svm->nested.hsave->control.tsc_offset += adjustment;
+	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
 }
 
 static void init_vmcb(struct vcpu_svm *svm)
-- 
1.7.1


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