KVM: SVM: do not intercept task switch with NPT

When KVM uses NPT there is no reason to intercept task switches. This patch
removes the intercept for it in that case.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index da3ddef47605..8d04aed72f3a 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -591,6 +591,7 @@ static void init_vmcb(struct vcpu_svm *svm)
         if (npt_enabled) {
                 /* Setup VMCB for Nested Paging */
                 control->nested_ctl = 1;
+                control->intercept &= ~(1ULL << INTERCEPT_TASK_SWITCH);
                 control->intercept_exceptions &= ~(1 << PF_VECTOR);
                 control->intercept_cr_read &= ~(INTERCEPT_CR0_MASK|
                                                 INTERCEPT_CR3_MASK);