From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> FNAME(sync_page) in arch/x86/kvm/mmu/paging_tmpl.h assumes that the initial shadow page table entry (SPTE) is zero. Remove the assumption by using SHADOW_NONPRESENT_VALUE that will be updated from 0 to non-zero value. Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> --- arch/x86/kvm/mmu/paging_tmpl.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index 39e0205e7300..4586de2cfe57 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -1036,7 +1036,8 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) gpa_t pte_gpa; gfn_t gfn; - if (!sp->spt[i]) + /* spt[i] has initial value of shadow page table allocation */ + if (sp->spt[i] != SHADOW_NONPRESENT_VALUE) continue; pte_gpa = first_pte_gpa + i * sizeof(pt_element_t); -- 2.25.1
