From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 611CEC0015E for ; Sun, 16 Jul 2023 19:57:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230341AbjGPT5T (ORCPT ); Sun, 16 Jul 2023 15:57:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230337AbjGPT5S (ORCPT ); Sun, 16 Jul 2023 15:57:18 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0923AEE for ; Sun, 16 Jul 2023 12:57:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 920B760E8C for ; Sun, 16 Jul 2023 19:57:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9CF24C433CA; Sun, 16 Jul 2023 19:57:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689537437; bh=G3MfMjPT8TmOP1ULgp5UFNYbOu650UDH9ztQ6U3ZatI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1lKQkfZjS0ltDvk7ShTx8HZcaeFEdVbMqm4Re5S2rn0DODs5KNIV9Hl9UnpL3L0Hw F/sss6LxKCOU8ExcydfbGSyvD0Swh1ts4YdDmg+4Uzd+JvM6vwOLWidsiaILwpSB74 fygR1ZTfuXv3gt/I+LTF1uVRI61ZTb3G9P4I9kOY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Juergen Gross , "Borislav Petkov (AMD)" , Sasha Levin Subject: [PATCH 6.4 096/800] x86/mm: Fix __swp_entry_to_pte() for Xen PV guests Date: Sun, 16 Jul 2023 21:39:09 +0200 Message-ID: <20230716194951.343397968@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Juergen Gross [ Upstream commit 0f88130e8a6fd185b0aeb5d8e286083735f2585a ] Normally __swp_entry_to_pte() is never called with a value translating to a valid PTE. The only known exception is pte_swap_tests(), resulting in a WARN splat in Xen PV guests, as __pte_to_swp_entry() did translate the PFN of the valid PTE to a guest local PFN, while __swp_entry_to_pte() doesn't do the opposite translation. Fix that by using __pte() in __swp_entry_to_pte() instead of open coding the native variant of it. For correctness do the similar conversion for __swp_entry_to_pmd(). Fixes: 05289402d717 ("mm/debug_vm_pgtable: add tests validating arch helpers for core MM features") Signed-off-by: Juergen Gross Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20230306123259.12461-1-jgross@suse.com Signed-off-by: Sasha Levin --- arch/x86/include/asm/pgtable_64.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 7929327abe009..a629b1b9f65a6 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -237,8 +237,8 @@ static inline void native_pgd_clear(pgd_t *pgd) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) #define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val((pmd)) }) -#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) -#define __swp_entry_to_pmd(x) ((pmd_t) { .pmd = (x).val }) +#define __swp_entry_to_pte(x) (__pte((x).val)) +#define __swp_entry_to_pmd(x) (__pmd((x).val)) extern void cleanup_highmap(void); -- 2.39.2