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 X-Spam-Level: X-Spam-Status: No, score=-3.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BA0FC4360F for ; Thu, 21 Feb 2019 11:35:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EAA1921907 for ; Thu, 21 Feb 2019 11:35:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qK8D8Gtf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EAA1921907 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=jcstzDoDkveHuIbSjJR8VvsGVX5Xpdgu/LW+9LOfU00=; b=qK8D8Gtfd3yGtf J5zt6M2sSIIrDhdMFWVhoSn+fis4biCPkK3SxoxpAkB/D3FOzmtvZmq7rntq+fBpSHtQf/0hVXLtt W6deZKp3xrtG7D2amtpNbi7rKYd1tZQn/TLG9MPbB2cOF66UpORKFnV8l5/7GHBCELXkWhChj5pUg O6jZOKIdHe5/NzjLRcrSTtcdwIydv9MlidBpuKAriYmkxO6o8WH2soQSEIbOHtXi9dwu74iFL3d1H 7iNT4onH1rZMA/Q4xoHWF8UFrcBC31R7l0ilITjT+E1xTUQK4x9hV7G6g3u0Nz3aDMPPqZNHL/huW 5LRSZIiLqaT8Va093QIg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwmdL-0003zt-6M; Thu, 21 Feb 2019 11:35:19 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwmdI-0003z1-S5 for linux-arm-kernel@lists.infradead.org; Thu, 21 Feb 2019 11:35:18 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 97F8180D; Thu, 21 Feb 2019 03:35:15 -0800 (PST) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 135B73F5C1; Thu, 21 Feb 2019 03:35:11 -0800 (PST) From: Steven Price To: linux-mm@kvack.org Subject: [PATCH v2 00/13] Convert x86 & arm64 to use generic page walk Date: Thu, 21 Feb 2019 11:34:49 +0000 Message-Id: <20190221113502.54153-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190221_033516_913822_6BFEED28 X-CRM114-Status: GOOD ( 14.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , x86@kernel.org, Arnd Bergmann , Ard Biesheuvel , Peter Zijlstra , Catalin Marinas , Dave Hansen , Will Deacon , linux-kernel@vger.kernel.org, Steven Price , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , James Morse , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, "Liang, Kan" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Most architectures current have a debugfs file for dumping the kernel page tables. Currently each architecture has to implement custom functions for walking the page tables because the generic walk_page_range() function is unable to walk the page tables used by the kernel. This series extends the capabilities of walk_page_range() so that it can deal with the page tables of the kernel (which have no VMAs and can contain larger huge pages than exist for user space). x86 and arm64 are then converted to make use of walk_page_range() removing the custom page table walkers. Potentially future changes could unify the implementations of the debugfs walkers further, moving the common functionality into common code. This would require a common way of handling the effective permissions (currently implemented only for x86) along with a per-arch way of formatting the page table information for debugfs. One immediate benefit would be getting the KASAN speed up optimisation in arm64 (and other arches) which is currently only implemented for x86. Changes since v1: * Added p4d_large() macro * Comments to explain p?d_large() macro semantics * Expanded comment for pte_hole() callback to explain mapping between depth and P?D * Handle folded page tables at all levels, so depth from pte_hole() ignores folding at any level (see real_depth() function in mm/pagewalk.c) James Morse (2): arm64: mm: Add p?d_large() definitions mm: Add generic p?d_large() macros Steven Price (11): x86/mm: Add p?d_large() definitions mm: pagewalk: Add p4d_entry() and pgd_entry() mm: pagewalk: Allow walking without vma mm: pagewalk: Add 'depth' parameter to pte_hole mm: pagewalk: Add test_p?d callbacks arm64: mm: Convert mm/dump.c to use walk_page_range() x86/mm: Point to struct seq_file from struct pg_state x86/mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct x86/mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct x86/mm: Convert ptdump_walk_pgd_level_core() to take an mm_struct x86: mm: Convert dump_pagetables to use walk_page_range arch/arm64/include/asm/pgtable.h | 2 + arch/arm64/mm/dump.c | 108 +++++----- arch/x86/include/asm/pgtable.h | 8 +- arch/x86/mm/debug_pagetables.c | 8 +- arch/x86/mm/dump_pagetables.c | 342 ++++++++++++++++--------------- arch/x86/platform/efi/efi_32.c | 2 +- arch/x86/platform/efi/efi_64.c | 4 +- fs/proc/task_mmu.c | 4 +- include/asm-generic/pgtable.h | 19 ++ include/linux/mm.h | 26 ++- mm/hmm.c | 2 +- mm/migrate.c | 1 + mm/mincore.c | 1 + mm/pagewalk.c | 107 +++++++--- 14 files changed, 375 insertions(+), 259 deletions(-) -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel