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KVM: x86: do not reset mmu if CR0.CD and CR0.NW are changed

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CR0.CD and CR0.NW are not used by shadow page table so that need
not adjust mmu if these two bit are changed

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiao Guangrong 2015-05-13 14:42:28 +08:00 • committed by Paolo Bonzini
parent efdfe536d8
commit d81135a57a
1 changed files with 1 additions and 2 deletions
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3
arch/x86/kvm/x86.c
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@ -572,8 +572,7 @@ out:
int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
unsigned long old_cr0 = kvm_read_cr0(vcpu);
unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
X86_CR0_CD | X86_CR0_NW;
unsigned long update_bits = X86_CR0_PG | X86_CR0_WP;
cr0 |= X86_CR0_ET;