From patchwork Tue Apr 20 09:09:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 12213571 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=-12.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 D5AF6C433B4 for ; Tue, 20 Apr 2021 09:12:30 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 18B4F600EF for ; Tue, 20 Apr 2021 09:12:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 18B4F600EF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc: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=e87ioJz/xOOi8eQ01P0yj8MqvkRZgG4F2x1KZruAe2s=; b=G/zMgZWFIr3oFjXoXQS+VR73pe GB2plBkSdmkpb8AQozWh3FKbdUBKSwhvr8NCvOaFJnH/WIpC+SyqVc/J/CcfM4i7rFwj714wTpvHg 0tTxqvk055a6tSsmW/fWr7b7HvBZBaREjvUgS9l4cgOvR7Gjf8Mo8X3rH6lb7vQyA5L87UMn+MIbn JJWl9N48lTQeBEyG8h0N6UMyvXOvmxNqOli+IDQD4hz3EyyO9UyHBrxxOVOyiergO0D8uHzogNYm3 9MSH71MoUTmxMzaYbZi9R1HDWZNXt3LMVGxnF3Wha9ZCHHiaGXe3HMR0877qhfeoDAiM+n3A4Mn5u jkcWBxzg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lYmOe-00Bfym-IH; Tue, 20 Apr 2021 09:10:16 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYmO2-00BftX-AN for linux-arm-kernel@desiato.infradead.org; Tue, 20 Apr 2021 09:09:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=LqMF0n45eDZD1EiVAIrDsHMgFEngimo+aJtuWEwbUnw=; b=tZMQUB77WVm6fV5XCd/hL7KUpi aPP3TiVYCDClHDiy9JXN37gcYt0IjyImAXkbVjE/m34HKm6vDcILbtFv9fDzWlR58s/1DQOnbfxFE e7yzRAVTAI5eTmuyz8KkX1S906nf6KXJLsLzVIsGmhP3G8z0Vlce+EJyf0dCXCKu1b+cNVsqRr3AD ejFo51g40pWKhYh/gqjo/TK9rph5QjATSS4t62JJ4f1+63G5Hgxzl6keMSWmXNSUGGgeCJ65oeEZU Le1Qt/stGBpRJY5Su7XzPrz7UYsnfTqMSovzJbZe5+H8kSuIMxI7CDM52YAzLozHvlftp5PeSJlOj 3w5hE+Cg==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYmNz-00BxPk-Lu for linux-arm-kernel@lists.infradead.org; Tue, 20 Apr 2021 09:09:37 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id CA915611F2; Tue, 20 Apr 2021 09:09:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618909774; bh=TVJDUXhJ6CplL+qBeAb0uQbwAMiGJwKZzeHI/o52vzg=; h=From:To:Cc:Subject:Date:From; b=WP/6RRsHt1xJ6WubZpF0wiLM/Q+b+naQEzZ9T1AGJ7I0BrkiWYXWhBz4D5la8KdBE 3tyOyGNKIATejyXsplTnTMyCyjbGuqsDRQtl829ReQkddr0kEaMvfMTFMBM9IwSwpk OmOHdm7PwLHL+Z526d1n9TFE5nAWi4VMpSdkFbYMj2qKam5pl60VYuh9eqqyfzVCoT hyXIqd2uIG/B7n90ABXMRR6OkADFhavU1Rlbj50ScGK/SJsOEWHkSTkd83uVoC50W2 Yslw+v/GG2aCgoSGiIMHQYouLKY566vD9Y35qh6bnON6EN5opk/p+7jGlYESv2IgbX kEzFt62nV8TLQ== From: Mike Rapoport To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Ard Biesheuvel , Catalin Marinas , David Hildenbrand , Marc Zyngier , Mark Rutland , Mike Rapoport , Mike Rapoport , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v1 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Tue, 20 Apr 2021 12:09:21 +0300 Message-Id: <20210420090925.7457-1-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210420_020935_779358_F4920475 X-CRM114-Status: GOOD ( 13.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mike Rapoport Hi, These patches aim to remove CONFIG_HOLES_IN_ZONE and essentially hardwire pfn_valid_within() to 1. The idea is to mark NOMAP pages as reserved in the memory map and restore the intended semantics of pfn_valid() to designate availability of struct page for a pfn. With this the core mm will be able to cope with the fact that it cannot use NOMAP pages and the holes created by NOMAP ranges within MAX_ORDER blocks will be treated correctly even without the need for pfn_valid_within. The patches are only boot tested on qemu-system-aarch64 so I'd really appreciate memory stress tests on real hardware. If this actually works we'll be one step closer to drop custom pfn_valid() on arm64 altogether. Changes since RFC Link: https://lore.kernel.org/lkml/20210407172607.8812-1-rppt@kernel.org * Add comment about the semantics of pfn_valid() as Anshuman suggested * Extend comments about MEMBLOCK_NOMAP, per Anshuman * Use pfn_is_map_memory() name for the exported wrapper for memblock_is_map_memory(). It is still local to arch/arm64 in the end because of header dependency issues. Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map from pfn_valid() arm64: drop pfn_valid_within() and simplify pfn_valid() arch/arm64/Kconfig | 3 --- arch/arm64/include/asm/memory.h | 2 +- arch/arm64/include/asm/page.h | 1 + arch/arm64/kvm/mmu.c | 2 +- arch/arm64/mm/init.c | 10 ++++++++-- arch/arm64/mm/ioremap.c | 4 ++-- arch/arm64/mm/mmu.c | 2 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 54 insertions(+), 13 deletions(-) base-commit: e49d033bddf5b565044e2abe4241353959bc9120