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 7085EC43217 for ; Thu, 21 Apr 2022 20:36:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1392429AbiDUUj1 (ORCPT ); Thu, 21 Apr 2022 16:39:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1392409AbiDUUjW (ORCPT ); Thu, 21 Apr 2022 16:39:22 -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 B63CE4DF68 for ; Thu, 21 Apr 2022 13:36:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 55A3361D7F for ; Thu, 21 Apr 2022 20:36:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A61FAC385A7; Thu, 21 Apr 2022 20:36:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1650573390; bh=T49BKFriIBKSSCQ5xv8ZiSx2G2tENRCRegtPm7f4SSc=; h=Date:To:From:Subject:From; b=fdaH61UHjdSVEYWNAzs3PNBrS7h8QSiKrllt770xcvjjYsQlUXEnHF36kyOzZslF1 z9CGEEONTb26Vc3/yzMtN0KHiC+cXmK6OkusWF2LQxRdNJTDjAFbtFHF5rei2FAMoL ZmHgiCzIB0SfI2jLsE16R2+kk0TatsY+PH/hbYEc= Date: Thu, 21 Apr 2022 13:36:29 -0700 To: mm-commits@vger.kernel.org, will@kernel.org, wangkefeng.wang@huawei.com, tglx@linutronix.de, paul.walmsley@sifive.com, palmer@dabbelt.com, mingo@redhat.com, hpa@zytor.com, guohanjun@huawei.com, dave.hansen@linux.intel.com, catalin.marinas@arm.com, bp@alien8.de, aou@eecs.berkeley.edu, anshuman.khandual@arm.com, tongtiangen@huawei.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch added to -mm tree Message-Id: <20220421203630.A61FAC385A7@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: page_table_check: use PxD_SIZE instead of PxD_PAGE_SIZE has been added to the -mm tree. Its filename is mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Tong Tiangen Subject: mm: page_table_check: use PxD_SIZE instead of PxD_PAGE_SIZE Patch series "mm: page_table_check: add support on arm64 and riscv", v5. Page table check performs extra verifications at the time when new pages become accessible from the userspace by getting their page table entries (PTEs PMDs etc.) added into the table. It is supported on X86[1]. This patchset made some simple changes and make it easier to support new architecture, then we support this feature on ARM64 and RISCV. [1]https://lore.kernel.org/lkml/20211123214814.3756047-1-pasha.tatashin@soleen.com/ This patch (of 5): Macro PUD_SIZE/PMD_SIZE is more general in various architectures. Using PUD_SIZE/PMD_SIZE instead of PUD_PAGE_SIZE/PMD_PAGE_SIZE can better support page table check in architectures other than x86 and it is no functional impact on x86. Link: https://lkml.kernel.org/r/20220421082042.1167967-1-tongtiangen@huawei.com Link: https://lkml.kernel.org/r/20220421082042.1167967-2-tongtiangen@huawei.com Signed-off-by: Tong Tiangen Suggested-by: Anshuman Khandual Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: Catalin Marinas Cc: Will Deacon Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Kefeng Wang Cc: Guohanjun Signed-off-by: Andrew Morton --- mm/page_table_check.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/mm/page_table_check.c~mm-page_table_check-using-pxd_size-instead-of-pxd_page_size +++ a/mm/page_table_check.c @@ -177,7 +177,7 @@ void __page_table_check_pmd_clear(struct if (pmd_user_accessible_page(pmd)) { page_table_check_clear(mm, addr, pmd_pfn(pmd), - PMD_PAGE_SIZE >> PAGE_SHIFT); + PMD_SIZE >> PAGE_SHIFT); } } EXPORT_SYMBOL(__page_table_check_pmd_clear); @@ -190,7 +190,7 @@ void __page_table_check_pud_clear(struct if (pud_user_accessible_page(pud)) { page_table_check_clear(mm, addr, pud_pfn(pud), - PUD_PAGE_SIZE >> PAGE_SHIFT); + PUD_SIZE >> PAGE_SHIFT); } } EXPORT_SYMBOL(__page_table_check_pud_clear); @@ -219,7 +219,7 @@ void __page_table_check_pmd_set(struct m __page_table_check_pmd_clear(mm, addr, *pmdp); if (pmd_user_accessible_page(pmd)) { page_table_check_set(mm, addr, pmd_pfn(pmd), - PMD_PAGE_SIZE >> PAGE_SHIFT, + PMD_SIZE >> PAGE_SHIFT, pmd_write(pmd)); } } @@ -234,7 +234,7 @@ void __page_table_check_pud_set(struct m __page_table_check_pud_clear(mm, addr, *pudp); if (pud_user_accessible_page(pud)) { page_table_check_set(mm, addr, pud_pfn(pud), - PUD_PAGE_SIZE >> PAGE_SHIFT, + PUD_SIZE >> PAGE_SHIFT, pud_write(pud)); } } _ Patches currently in -mm which might be from tongtiangen@huawei.com are mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch mm-page_table_check-add-hooks-to-public-helpers.patch riscv-mm-add-support-for-page-table-check.patch