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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86A9AC433EF for ; Mon, 25 Oct 2021 04:06:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6070760F70 for ; Mon, 25 Oct 2021 04:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232285AbhJYEJA (ORCPT ); Mon, 25 Oct 2021 00:09:00 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:26215 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229379AbhJYEI6 (ORCPT ); Mon, 25 Oct 2021 00:08:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1635134796; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=xt4dSqCcvO8Ds9ncTZOb5dKcnC/w5v8GuDpHPG0IPbk=; b=YHcPnIHnkaJz8ssUf0KKbYViIaDviDO3V8Vu6goYuua+CC9kgICUe8CSZLbk2hG0OH8GIv gODnLYORD+n0RQSuNco+Sz+A3NUU8Y6sSSfHfDNFxpaTl1h13yjlfNSEOyldZEdzt4RAg5 g6OgkKe6W3Vg4YJLDNmeG+7dP0bVROM= Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-229-Al4uKfP2Oc6R-qJ-uRfIew-1; Mon, 25 Oct 2021 00:06:33 -0400 X-MC-Unique: Al4uKfP2Oc6R-qJ-uRfIew-1 Received: by mail-pg1-f198.google.com with SMTP id a18-20020a637f12000000b002a44c4f0e66so901888pgd.7 for ; Sun, 24 Oct 2021 21:06:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=xt4dSqCcvO8Ds9ncTZOb5dKcnC/w5v8GuDpHPG0IPbk=; b=6B9yWUAyA4y4tFY/fTYg+2HEn+TfDBNG/3AI9wEliYhw/Ge8L6jn2U22dI7nu9EPRo d1eoh4DEi4qD4IjRhLCaSW4WqZ7hKi2EHnD1VR19FHspSsb5UXN8a1c3f4y2bb9dXoQs LaUL8s/KUk/ZJdcG9PEbVR+fnlPqBt0Dzl6nmmteurryHlyEY1RHHTaoNVnQYqGJoVuV iFLuntAxNAiDTczgA3XwlDQYLtl7z+93E0F+mZZN0aRq/QiNZXCNRE6D0n/52TkoBBf2 l/j3mEutfKIlr8GCqLPVThl8OmcmKIe22SCD9TIfgB9CAems7MZhtuDDTW9RQquwo0lI StGg== X-Gm-Message-State: AOAM5303c7jJDZw8U+jn+a0eMQ4i1vinLvlSvM8C4dJkouJWl0xAh5/G lQSfTvhRiZ3eYsWTpa4s7d2fbLUq0Xc77RPKEWEz/YJh88BstqOe3QEzUCX03HQJ8qBNVuxhvXo uOd+5QjX0CIe/joriUhgZ1AaS X-Received: by 2002:a05:6a00:1591:b0:47b:eaa8:1a70 with SMTP id u17-20020a056a00159100b0047beaa81a70mr5341971pfk.75.1635134791967; Sun, 24 Oct 2021 21:06:31 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyuKpgNNfZmeGA9xdRKARCXaMf4DsW7R45QGzXVYEhI4kpnnozmulSLyekCqG+/q0mMPlXAoA== X-Received: by 2002:a05:6a00:1591:b0:47b:eaa8:1a70 with SMTP id u17-20020a056a00159100b0047beaa81a70mr5341936pfk.75.1635134791662; Sun, 24 Oct 2021 21:06:31 -0700 (PDT) Received: from samantha.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id a12sm19583944pjq.16.2021.10.24.21.06.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 Oct 2021 21:06:31 -0700 (PDT) From: wefu@redhat.com To: anup.patel@wdc.com, atish.patra@wdc.com, palmerdabbelt@google.com, guoren@kernel.org, christoph.muellner@vrull.eu, philipp.tomsich@vrull.eu, hch@lst.de, liush@allwinnertech.com, wefu@redhat.com, lazyparser@gmail.com, drew@beagleboard.org Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, taiten.peng@canonical.com, aniket.ponkshe@canonical.com, heinrich.schuchardt@canonical.com, gordan.markus@canonical.com, guoren@linux.alibaba.com, arnd@arndb.de, wens@csie.org, maxime@cerno.tech, dlustig@nvidia.com, gfavor@ventanamicro.com, andrea.mondelli@huawei.com, behrensj@mit.edu, xinhaoqu@huawei.com, huffman@cadence.com, mick@ics.forth.gr, allen.baum@esperantotech.com, jscheid@ventanamicro.com, rtrauben@gmail.com Subject: [RESEND PATCH V3 0/2] riscv: add RISC-V Svpbmt Standard Extension supports Date: Mon, 25 Oct 2021 12:06:05 +0800 Message-Id: <20211025040607.92786-1-wefu@redhat.com> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fu Wei This patch follows the RISC-V standard Svpbmt extension in privilege spec to solve the non-coherent SOC DMA synchronization issues. The svpbmt PTE format: | 63 | 62-61 | 60-8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 N MT RSW D A G U X W R V ^ Of the Reserved bits [63:54] in a leaf PTE, the bits [62:61] are used as the MT (aka MemType) field. This field specifies one of three memory types as shown in the following tableļ¼š MemType RISC-V Description ---------- ------------------------------------------------ 00 - PMA Normal Cacheable, No change to implied PMA memory type 01 - NC Non-cacheable, idempotent, weakly-ordered Main Memory 10 - IO Non-cacheable, non-idempotent, strongly-ordered I/O memory 11 - Rsvd Reserved for future standard use The standard protection_map[] needn't be modified because the "PMA" type keeps the highest bits zero. And the whole modification is limited in the arch/riscv/* and using a global variable(__riscv_svpbmt) as _PAGE_DMA_MASK/IO/NC for pgprot_noncached (&writecombine) in pgtable.h. We also add _PAGE_CHG_MASK to filter PFN than before. Enable it in devicetree - (Add "mmu-supports-svpbmt" in cpu node) - mmu-supports-svpbmt Wei Fu (2): dt-bindings: riscv: add mmu-supports-svpbmt for Svpbmt riscv: add RISC-V Svpbmt extension supports .../devicetree/bindings/riscv/cpus.yaml | 5 +++ arch/riscv/include/asm/fixmap.h | 2 +- arch/riscv/include/asm/pgtable-64.h | 8 ++-- arch/riscv/include/asm/pgtable-bits.h | 41 ++++++++++++++++++- arch/riscv/include/asm/pgtable.h | 39 ++++++++++++++---- arch/riscv/kernel/cpufeature.c | 32 +++++++++++++++ arch/riscv/mm/init.c | 5 +++ 7 files changed, 117 insertions(+), 15 deletions(-) -- 2.25.4