From patchwork Thu Feb 9 03:53:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qinglin Pan X-Patchwork-Id: 13133921 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3DDC5C61DA4 for ; Thu, 9 Feb 2023 03:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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=as4qfthJMHXUUnHyhxOXPxrR2FX2701JMC/NRc6qQzs=; b=MAVq9rAroWhfZb dIekM7GumFvfmodnW6vbkEPj/DmYZNqflX184YUw+1LAVYLoDCawN7VfJEWzafIB6EsTI1r8kggyp NtdBZqfN8Tw7q61JUvpAokMwdzs8tTmAPJn2J/8nlx9kXvmtm9g+eJQETbs7fMI8RcI/AqC1QCeF7 Sg+xFNku4CiEbfbHtiE81L9mNzes3t36thl6kIPaZD/qlnAnpule10ilKRlK96K167CKmRJerTO32 i76ed/1azRlHXtG5QKDXUfPsPvX24UyNgVxu2YGlpXzLaqgR6oci0Wjf4vEQpSACWhAyauk5Lyw97 86CwweR9LCGPLqNCYOyQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pPy0T-0004Et-LH; Thu, 09 Feb 2023 03:53:57 +0000 Received: from mail-pl1-x62a.google.com ([2607:f8b0:4864:20::62a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pPy0Q-0004EM-CD for linux-riscv@lists.infradead.org; Thu, 09 Feb 2023 03:53:55 +0000 Received: by mail-pl1-x62a.google.com with SMTP id m2so1535544plg.4 for ; Wed, 08 Feb 2023 19:53:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=12dTRWaMWZUAG31L2kEM0o5/KiMO3deRVWjq9P0fDIc=; b=e5TLdepd+V8n6CZEueibyDm4A37unRbqxewxb4Ove1khAXMYMYoJyuUIshTjZ4cTuY XL7mplJBO4SuMXK00+g+bWxfddJE752rrR2nrmPNzcg95GjMAnJu9rGubzy9I4FAC9wt 0fwPsKgeCvKlc95gS7ImU/ESg76C19mCFL1gUA4dzF9aJD90nmWf9Q+YEADnrTp8sRAx LSHdOMk78UmKZe3c3ql3p5qQtgnKJBu/gC5O4r42U+aoPYAPM1RmwghCnNbCgFpvVlN6 QbWJmT6IV1YN13X5a7zBfo2k17rTt9052mA23cr19p+o6Ea4Bs4MMggeXowlkJ440adz PEPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=12dTRWaMWZUAG31L2kEM0o5/KiMO3deRVWjq9P0fDIc=; b=rwPr20R+lSfCbiYBWysX7rVIlR+KFpKWtRCt4WBeR7kvgFVfEQi9B6QYF7dFZQSrbV S0UrY1aIwFuRBfnx7RP4XTwAybrC+9tSDjXIpCOFrUsPRTvf4PWedsMQfvUJ8ON+8OEi Ib0B43yOf+pjJ14frdbfyGzJA39LtAhoo3uOIC3rCXAjkEf2f4Y99S6eEcMQSeNTQVOf HH2+0O/fK1/3f2XclEIzg/A2VPo2+RHD0O7H1Gl4FeLCh0IlaQMnluVDpvrCM8q5PC2r Ym0nNgR5ZhjvIu4NdhgQRzXh0OxrgRlyCQ4vqKSp5BEQeUWBRKys6zKtaq2PM7MdkSiW G9dA== X-Gm-Message-State: AO0yUKVYZnA0rc11SIycecvguDR284G89/ehdTSMAjSEgoDEO0L4dxKE vqMXiFC4YnXephk42//kSnI= X-Google-Smtp-Source: AK7set/vQAv21gb8LjGESbUJsYeQTutgFtDuRboP1A/GkDi8tm4cnkUaVPLNAC15FMS3eBBBWFC4qA== X-Received: by 2002:a17:903:1207:b0:196:5f75:66f9 with SMTP id l7-20020a170903120700b001965f7566f9mr12192678plh.63.1675914830936; Wed, 08 Feb 2023 19:53:50 -0800 (PST) Received: from localhost.localdomain ([47.75.78.161]) by smtp.gmail.com with ESMTPSA id p5-20020a170902eac500b00192820d00d0sm252602pld.120.2023.02.08.19.53.48 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 08 Feb 2023 19:53:50 -0800 (PST) From: Qinglin Pan To: palmer@dabbelt.com, linux-riscv@lists.infradead.org Cc: jeff@riscv.org, xuyinan@ict.ac.cn, conor@kernel.org, ajones@ventanamicro.com, Qinglin Pan Subject: [PATCH v12 0/3] riscv, mm: detect svnapot cpu support at runtime Date: Thu, 9 Feb 2023 11:53:40 +0800 Message-Id: <20230209035343.15282-1-panqinglin00@gmail.com> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230208_195354_474913_7477997B X-CRM114-Status: GOOD ( 12.92 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Svnapot is a RISC-V extension for marking contiguous 4K pages as a non-4K page. This patch set is for using Svnapot in hugetlb fs and huge vmap. This patchset adds a Kconfig item for using Svnapot in "Platform type"->"SVNAPOT extension support". Its default value is on, and people can set it off if they don't allow kernel to detect Svnapot hardware support and leverage it. Tested on: - qemu rv64 with "Svnapot support" off and svnapot=true. - qemu rv64 with "Svnapot support" on and svnapot=true. - qemu rv64 with "Svnapot support" off and svnapot=false. - qemu rv64 with "Svnapot support" on and svnapot=false. Changes in v2: - detect Svnapot hardware support at boot time. Changes in v3: - do linear mapping again if has_svnapot Changes in v4: - fix some errors/warns reported by checkpatch.pl, thanks @Conor Changes in v5: - modify code according to @Conor and @Heiko Changes in v6: - use static key insead of alternative errata Changes in v7: - add napot_cont_order for possible more napot order in the future - remove linear mapping related code from this patchset to another patch - refactor hugetlb code for svnapot according to thanks @Andrew @Conor - use tools/testing/selftests/vm/map_hugetlb as hugetlb testing program - support svnapot in huge vmap on newer for-next branch Changes in v8: - fix compilation errors in rv32_defconfig - insert some lines of whitespace according to @Conor's suggestion Changes in v9: - use alternative to avoid using static branches inside heavily used inline functions - change napot_cont_mask definition - post test_vmalloc modification about testing vmalloc_huge Changes in v10: - fix some nits caught by @Andrew - collect Reviewed-by/Acked-by - add memory leak warning in KConfig text - replace test_vmalloc patch link with the standard one Changes in v11: - add more detailed warning about HUGETLBFS and SVNAPOT in KConfig text - fix missing reverse-xmas tree Changes in v12: - rebase on the new ISA extension API [1] [1]https://lore.kernel.org/all/20230128172856.3814-5-jszhang@kernel.org/ Qinglin Pan (3): riscv: mm: modify pte format for Svnapot riscv: mm: support Svnapot in hugetlb page riscv: mm: support Svnapot in huge vmap arch/riscv/Kconfig | 21 +- arch/riscv/include/asm/hugetlb.h | 34 +++- arch/riscv/include/asm/hwcap.h | 9 +- arch/riscv/include/asm/page.h | 5 - arch/riscv/include/asm/pgtable-64.h | 34 ++++ arch/riscv/include/asm/pgtable.h | 39 +++- arch/riscv/include/asm/vmalloc.h | 61 +++++- arch/riscv/kernel/cpu.c | 1 + arch/riscv/kernel/cpufeature.c | 1 + arch/riscv/mm/hugetlbpage.c | 301 ++++++++++++++++++++++++++++ 10 files changed, 493 insertions(+), 13 deletions(-)