From patchwork Thu Apr 21 08:20:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tong Tiangen X-Patchwork-Id: 12821259 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 40634C433EF for ; Thu, 21 Apr 2022 08:02:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B0EBB6B0071; Thu, 21 Apr 2022 04:02:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AC0CD6B0073; Thu, 21 Apr 2022 04:02:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 987666B0074; Thu, 21 Apr 2022 04:02:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 87C336B0071 for ; Thu, 21 Apr 2022 04:02:09 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 52BE082C7A for ; Thu, 21 Apr 2022 08:02:09 +0000 (UTC) X-FDA: 79380143178.09.F35E75F Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by imf29.hostedemail.com (Postfix) with ESMTP id 5FB12120017 for ; Thu, 21 Apr 2022 08:02:07 +0000 (UTC) Received: from kwepemi100006.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4KkVPG3y7HzhY36; Thu, 21 Apr 2022 16:01:54 +0800 (CST) Received: from kwepemm600017.china.huawei.com (7.193.23.234) by kwepemi100006.china.huawei.com (7.221.188.165) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 21 Apr 2022 16:02:03 +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; Thu, 21 Apr 2022 16:02:02 +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 v5 0/5]mm: page_table_check: add support on arm64 and riscv Date: Thu, 21 Apr 2022 08:20:37 +0000 Message-ID: <20220421082042.1167967-1-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf29.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.188 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 5FB12120017 X-Stat-Signature: gjgqox6y8tdrfwwttq3tmue5x5hyndmr X-HE-Tag: 1650528127-512361 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/ 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: add support for page table check Tong Tiangen (3): mm: page_table_check: using PxD_SIZE instead of PxD_PAGE_SIZE mm: page_table_check: add hooks to public helpers riscv: mm: add support for page table check arch/arm64/Kconfig | 1 + arch/arm64/include/asm/pgtable.h | 65 ++++++++++++++++++++++++--- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/pgtable.h | 77 +++++++++++++++++++++++++++++--- arch/x86/include/asm/pgtable.h | 29 +++++++----- include/linux/pgtable.h | 26 +++++++---- mm/page_table_check.c | 25 ++--------- 7 files changed, 174 insertions(+), 50 deletions(-)