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authorJoerg Roedel <joerg.roedel@amd.com>2008-04-16 18:51:15 +0400
committerAvi Kivity <avi@qumranet.com>2008-04-27 19:21:40 +0400
commit649d68643ebf02f31859ffbb16676aa44c72e6e9 (patch)
treedf28701a2ea2854765d41ba54ae8b3cb56ad0b47 /arch
parentbbf45ba57eaec56569918a8bab96ab653bd45ec1 (diff)
downloadlinux-649d68643ebf02f31859ffbb16676aa44c72e6e9.tar.xz
KVM: SVM: sync TPR value to V_TPR field in the VMCB
This patch adds syncing of the lapic.tpr field to the V_TPR field of the VMCB. With this change we can safely remove the CR8 read intercept. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/svm.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 3379e13d9b2c..f8ce36e6690c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -486,8 +486,7 @@ static void init_vmcb(struct vcpu_svm *svm)
control->intercept_cr_read = INTERCEPT_CR0_MASK |
INTERCEPT_CR3_MASK |
- INTERCEPT_CR4_MASK |
- INTERCEPT_CR8_MASK;
+ INTERCEPT_CR4_MASK;
control->intercept_cr_write = INTERCEPT_CR0_MASK |
INTERCEPT_CR3_MASK |
@@ -1621,6 +1620,19 @@ static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}
+static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 cr8;
+
+ if (!irqchip_in_kernel(vcpu->kvm))
+ return;
+
+ cr8 = kvm_get_cr8(vcpu);
+ svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
+ svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
+}
+
static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -1630,6 +1642,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
pre_svm_run(svm);
+ sync_lapic_to_cr8(vcpu);
+
save_host_msrs(vcpu);
fs_selector = read_fs();
gs_selector = read_gs();