Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=25e234...
Commit: 25e2343246fe135fce672f41abe61e9d2c38caac
Parent: fe634fd46ff643d98fdbcd153847e08c3c076e6e
Author: Avi Kivity <avi@redhat.com>
AuthorDate: Sun Dec 21 18:31:10 2008 +0200
Committer: Avi Kivity <avi@redhat.com>
CommitDate: Wed Dec 31 16:55:48 2008 +0200
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 <avi@redhat.com>
---
arch/x86/kvm/mmu.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 641c078..d50ebac 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) {
--
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