[kvm-devel] [PATCH 10/31] KVM: SVM: do not intercept task switch with NPT

[Avi K. <av...@qu...>]

From: Joerg Roedel <joe...@am...>

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 <joe...@am...>
Signed-off-by: Avi Kivity <av...@qu...>
---
 arch/x86/kvm/svm.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index da3ddef..8d04aed 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);
-- 
1.5.5