linux-kernel - [PATCH 27/39] KVM: SVM: Lazy fpu with npt

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Message-Id: <1266048119-14325-28-git-send-email-avi@redhat.com>
Date:	Sat, 13 Feb 2010 10:01:47 +0200
From:	Avi Kivity <avi@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 27/39] KVM: SVM: Lazy fpu with npt

Now that we can allow the guest to play with cr0 when the fpu is loaded,
we can enable lazy fpu when npt is in use.

Acked-by: Joerg Roedel <joerg.roedel@....com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/svm.c |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 83c7ab1..8d7cb62 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2588,8 +2588,6 @@ static void svm_flush_tlb(struct kvm_vcpu *vcpu)
 
 static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
 {
-	if (npt_enabled)
-		vcpu->fpu_active = 1;
 }
 
 static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
@@ -2928,12 +2926,6 @@ static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
 
-	if (npt_enabled) {
-		/* hack: npt requires active fpu at this time */
-		vcpu->fpu_active = 1;
-		return;
-	}
-
 	update_cr0_intercept(svm);
 	svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR;
 }
-- 
1.6.5.3

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