From 0e11df9649ac4251c1bc5f27b7d89636d9270a91 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 5 May 2020 12:47:26 +0530 Subject: [PATCH] powerpc/kvm/book3s: Use pte_present instead of opencoding _PAGE_PRESENT check This adds _PAGE_PTE check and makes sure we validate the pte value returned via find_kvm_host_pte. NOTE: this also considers _PAGE_INVALID to the software valid bit. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200505071729.54912-20-aneesh.kumar@linux.ibm.com --- arch/powerpc/include/asm/kvm_book3s_64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 1ca1f64950121..c58e64a0a74fb 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -435,7 +435,7 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing) continue; } /* If pte is not present return None */ - if (unlikely(!(pte_val(old_pte) & _PAGE_PRESENT))) + if (unlikely(!pte_present(old_pte))) return __pte(0); new_pte = pte_mkyoung(old_pte);