From patchwork Tue May 11 10:05:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 12250849 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=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, 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 88645C433B4 for ; Tue, 11 May 2021 12:47:03 +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 DFE0961921 for ; Tue, 11 May 2021 12:47:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DFE0961921 Authentication-Results: mail.kernel.org; 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Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lgPH5-009STZ-IO for linux-arm-kernel@lists.infradead.org; Tue, 11 May 2021 10:06:01 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2F60861360; Tue, 11 May 2021 10:05:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620727558; bh=RlNaQugaThbhHxZD0Bx4H5Pc9CrWxAqv0CUHIawYkSk=; h=From:To:Cc:Subject:Date:From; b=GmY0r1IkW3ZeGuFPesJIUk10G0bmFN6ceybj46DtgYlzYIMqRRPbswUKdNL2jBhnW l/ZvckzitBi4O5D1xMtId10RQRWtXmuPJLUMCooqUixyjZ+ggFmUWAhjBsNaCElc9T 8wGcvvublT2SaDT1c2KzMw4yGHJjHtzf0/joh0h/IYIYiAZXdKtEjzbQlET6xexDL2 o7etoJtcP0gOwdCLxDTBw00jI+Plg4iKtTu7BUlIIKrx87a1VRUXOjiwz8C0FoMU2E Ld0dMkYL/WSB7Z03xxLA93T3VBfMtc6LT4gd27sv43Kgy32Oz/AIIeG+V3yk7vWNyV ERDgF+e43XDbg== From: Mike Rapoport To: Andrew Morton 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-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v4 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Tue, 11 May 2021 13:05:46 +0300 Message-Id: <20210511100550.28178-1-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-20210511_030559_666059_72E9292D X-CRM114-Status: GOOD ( 12.10 ) 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 boot tested on qemu-system-aarch64. I beleive it would be best to route these via mmotm tree. v4: * rebase on v5.13-rc1 v3: Link: https://lore.kernel.org/lkml/20210422061902.21614-1-rppt@kernel.org * Fix minor issues found by Anshuman * Freshen up the declaration of pfn_valid() to make it consistent with pfn_is_map_memory() * Add more Acked-by and Reviewed-by tags, thanks Anshuman and David v2: Link: https://lore.kernel.org/lkml/20210421065108.1987-1-rppt@kernel.org * Add check for PFN overflow in pfn_is_map_memory() * Add Acked-by and Reviewed-by tags, thanks David. v1: Link: https://lore.kernel.org/lkml/20210420090925.7457-1-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. rfc: Link: https://lore.kernel.org/lkml/20210407172607.8812-1-rppt@kernel.org 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 | 3 ++- arch/arm64/kvm/mmu.c | 2 +- arch/arm64/mm/init.c | 14 +++++++++++++- 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, 60 insertions(+), 13 deletions(-) base-commit: 6efb943b8616ec53a5e444193dccf1af9ad627b5 Reviewed-by: Kefeng Wang