From 25e2343246fe135fce672f41abe61e9d2c38caac Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 21 Dec 2008 18:31:10 +0200 Subject: KVM: MMU: Don't treat a global pte as such if cr4.pge is cleared The pte.g bit is meaningless if global pages are disabled; deferring mmu page synchronization on these ptes will lead to the guest using stale shadow ptes. Fixes Vista x86 smp bootloader failure. Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch') diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 641c07844e6..d50ebac6a07 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1669,6 +1669,8 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, u64 mt_mask = shadow_mt_mask; struct kvm_mmu_page *sp = page_header(__pa(shadow_pte)); + if (!(vcpu->arch.cr4 & X86_CR4_PGE)) + global = 0; if (!global && sp->global) { sp->global = 0; if (sp->unsync) { -- cgit v1.2.3