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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55461C433F5 for ; Sat, 7 May 2022 10:42:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BA7A16B009B; Sat, 7 May 2022 06:42:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B0CAF6B0099; Sat, 7 May 2022 06:42:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 986C46B009D; Sat, 7 May 2022 06:42:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 7E6076B0099 for ; Sat, 7 May 2022 06:42:44 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 4C8E4834 for ; Sat, 7 May 2022 10:42:44 +0000 (UTC) X-FDA: 79438608648.23.6FE6B58 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by imf10.hostedemail.com (Postfix) with ESMTP id 51ADEC0021 for ; Sat, 7 May 2022 10:42:24 +0000 (UTC) Received: from kwepemi100022.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KwPBt5NknzhYxX; Sat, 7 May 2022 18:42:14 +0800 (CST) Received: from kwepemm600017.china.huawei.com (7.193.23.234) by kwepemi100022.china.huawei.com (7.221.188.126) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Sat, 7 May 2022 18:42:38 +0800 Received: from localhost.localdomain (10.175.112.125) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Sat, 7 May 2022 18:42:37 +0800 From: Tong Tiangen To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , , "H. Peter Anvin" , Pasha Tatashin , Anshuman Khandual , Andrew Morton , Catalin Marinas , Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou CC: , , , , Tong Tiangen , Kefeng Wang , Guohanjun Subject: [PATCH -next v7 0/6]mm: page_table_check: add support on arm64 and riscv Date: Sat, 7 May 2022 11:01:08 +0000 Message-ID: <20220507110114.4128854-1-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected X-Stat-Signature: ojpcsfopspe3chmwwtn46nxe5zcpqx91 Authentication-Results: imf10.hostedemail.com; dkim=none; spf=pass (imf10.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.187 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 51ADEC0021 X-HE-Tag: 1651920144-992652 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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/ v6 -> v7: According to Anshuman and Catalin's suggestion, optimized code implementation: 1. __set_pte_at() code specification modification. 2. pmdp_huge_get_and_clear() implementation optimization. v5 -> v6: According to Anshuman's suggestion, optimized partial implementation and commit message: 1. Remove redundant IS_ENABLED() in ptep_clear(). 2. Remove redundant __HAVE_ARCH_PTEP_CLEAR usage in pgtable.h. 3. Remove redundant __ptep_get_and_clear() on arm64 and riscv. v4 -> v5: According to Anshuman's suggestion, using PxD_SIZE instead of PxD_PAGE_SIZE in mm/page_table_check.c and it is checked by Pasha. v3 -> v4: Adapt to next-20220414 v2 -> v3: Modify ptep_clear() in include/linux/pgtable.h, using IS_ENABLED according to the suggestions of Pasha. v1 -> v2: 1. Fix arm64's pte/pmd/pud_user_accessible_page() according to the suggestions of Catalin. 2. Also fix riscv's pte_pmd_pud_user_accessible_page(). Kefeng Wang (2): mm: page_table_check: move pxx_user_accessible_page into x86 arm64/mm: Enable ARCH_SUPPORTS_PAGE_TABLE_CHECK Tong Tiangen (4): mm: page_table_check: using PxD_SIZE instead of PxD_PAGE_SIZE mm: page_table_check: add hooks to public helpers mm: remove __HAVE_ARCH_PTEP_CLEAR in pgtable.h riscv/mm: Enable ARCH_SUPPORTS_PAGE_TABLE_CHECK arch/arm64/Kconfig | 1 + arch/arm64/include/asm/pgtable.h | 61 ++++++++++++++++++++++++--- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/pgtable.h | 71 +++++++++++++++++++++++++++++--- arch/x86/include/asm/pgtable.h | 27 +++++++----- include/linux/pgtable.h | 21 ++++++---- mm/page_table_check.c | 25 ++--------- 7 files changed, 156 insertions(+), 51 deletions(-) -- 2.25.1