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KVM: SVM: sync TPR value to V_TPR field in the VMCB

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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>
This commit is contained in:
Joerg Roedel 2008-04-16 16:51:15 +02:00 • committed by Avi Kivity
parent bbf45ba57e
commit 649d68643e
1 changed files with 16 additions and 2 deletions
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18
arch/x86/kvm/svm.c
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@ -486,8 +486,7 @@ static void init_vmcb(struct vcpu_svm *svm)
control->intercept_cr_read = INTERCEPT_CR0_MASK | control->intercept_cr_read = INTERCEPT_CR0_MASK |
INTERCEPT_CR3_MASK | INTERCEPT_CR3_MASK |
INTERCEPT_CR4_MASK | INTERCEPT_CR4_MASK;
INTERCEPT_CR8_MASK;
control->intercept_cr_write = INTERCEPT_CR0_MASK | control->intercept_cr_write = INTERCEPT_CR0_MASK |
INTERCEPT_CR3_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) static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{ {
struct vcpu_svm *svm = to_svm(vcpu); 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); pre_svm_run(svm);
sync_lapic_to_cr8(vcpu);
save_host_msrs(vcpu); save_host_msrs(vcpu);
fs_selector = read_fs(); fs_selector = read_fs();
gs_selector = read_gs(); gs_selector = read_gs();