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KVM: Don't reset mmu context unnecessarily when updating EFER

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The only bit of EFER that affects the mmu is NX, and this is already
accounted for (LME only takes effect when changing cr0).

Based on a patch by Hillf Danton.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2010-10-11 14:23:39 +02:00
parent d0dfc6b74a
commit 010c520e20
1 changed files with 0 additions and 1 deletions
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arch/x86/kvm/x86.c
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@ -830,7 +830,6 @@ static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
kvm_x86_ops->set_efer(vcpu, efer);
vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
kvm_mmu_reset_context(vcpu);
/* Update reserved bits */
if ((efer ^ old_efer) & EFER_NX)