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KVM: x86: fix warning on 32-bit compilation

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PCIDs are only supported in 64-bit mode.  No need to clear bit 63
of CR3 unless the host is 64-bit.

Reported by Fengguang Wu's autobuilder.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-11-10 13:53:25 +01:00
parent ce1a5e60a6
commit ac146235d4
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86.c
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@ -750,7 +750,9 @@ EXPORT_SYMBOL_GPL(kvm_set_cr4);
int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{ {
#ifdef CONFIG_X86_64
cr3 &= ~CR3_PCID_INVD; cr3 &= ~CR3_PCID_INVD;
#endif
if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
kvm_mmu_sync_roots(vcpu); kvm_mmu_sync_roots(vcpu);