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

Joerg Roedel
2010-12-03T10:48:28Z

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.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