[PATCH 3/5] KVM MMU: fix for got gfn when sync shadow pages
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From: Xiao Guangrong on 12 May 2010 22:20 sp->gfns[] are not mapping gfn since it has cooked by unalias_gfn() Signed-off-by: Xiao Guangrong <xiaoguangrong(a)cn.fujitsu.com> --- arch/x86/kvm/paging_tmpl.h | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 11d8a16..71c73fe 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -588,7 +588,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) unsigned pte_access; pt_element_t gpte; gpa_t pte_gpa; - gfn_t gfn = sp->gfns[i]; + gfn_t gfn; if (!is_shadow_present_pte(sp->spt[i])) continue; @@ -599,8 +599,9 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) sizeof(pt_element_t))) return -EINVAL; - if (gpte_to_gfn(gpte) != gfn || !is_present_gpte(gpte) || - !(gpte & PT_ACCESSED_MASK)) { + gfn = gpte_to_gfn(gpte); + if (unalias_gfn(vcpu->kvm, gfn) != sp->gfns[i] || + !is_present_gpte(gpte) || !(gpte & PT_ACCESSED_MASK)) { u64 nonpresent; rmap_remove(vcpu->kvm, &sp->spt[i]); -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |