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=-4.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=no 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 E7442C433DF for ; Mon, 22 Jun 2020 06:33:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AE30C2541B for ; Mon, 22 Jun 2020 06:33:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="LBmdgW+u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726824AbgFVGdz (ORCPT ); Mon, 22 Jun 2020 02:33:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726686AbgFVGdy (ORCPT ); Mon, 22 Jun 2020 02:33:54 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3637C061794 for ; Sun, 21 Jun 2020 23:33:54 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id b16so7942221pfi.13 for ; Sun, 21 Jun 2020 23:33:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=p//jqJrWfVFOjyKLBt7xMkEyxWc/HLDv/7iZQ6ILA7c=; b=LBmdgW+ucSprQgGnygP8exzcYQPyLeVoNNyYkgW1XJiOCJ2qG2CZyRabEFA5w5BzHj as5md9y9JZpPU7MFmiBberQoMbKPJIS1j+hFYdsIa1tth6Z0bJfjGvQvFDGVTOT6/dyH DuV2LPs8t6GG3vAGNbp1Di9e+6eYgV4wBaLYJO8xBrUb/kIJn0UJWm95+zpExLgvJ9Js 7MOhg5ftRVc5xNLZrvjilQTq5FrsTsraFDYNY7+zw4DOwcqkw8BnhpZI2FnLa2ZGvXY2 fcG09GNZ23lNPu/pZLsJkGSMIE/WQSWdQsO1IGBgdLloIGV4mNu/UpFJmP/OQoAmrfrE HW/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=p//jqJrWfVFOjyKLBt7xMkEyxWc/HLDv/7iZQ6ILA7c=; b=NIUJUDah830N8hkvaRUw1scLHpJa+6XH9/A+Y8JSCvaOnZ7rEDahhskL0PuH3F0qON OAnJ0trHcKFt0MSaSUk/MOnHKhwws4vPbV9yAwKRcYrFUsSMq6LUKWUagkwZ0gP8+HNl XJFL2db7XpDpaMJdYk+d6vAG0R9YvoIT8NNtCuBRGTbDwHVtYU2gLUTi6MeywuP5wRfv wpn8Z8k2RfZ309FZtVXjL2WtHkooyVSZ6O91btUubnvblgYOlgb63XE3Jy8TaU+T9NxH gvWX1S/9JSfjAZdzChKFbzA06MgXdx4/OCNzSXrJJ9ctqSbSPBPosu2ra0ZFuPQvmlMc fVzw== X-Gm-Message-State: AOAM530xlnGBv6HpqQZ+MZ9z95MXw7nGp2T1Yrgy8UWHdRaM/kcxlvcf d/9iS5jTR7+W9/3zXKsUNLFVEA== X-Google-Smtp-Source: ABdhPJzbLL1TiAz0zrwctuXkWsQMr7H8MlkqUIheGxkGvgQ1k2bCNKN9rNYemEZnND0fGtEa8UPt7w== X-Received: by 2002:a63:1502:: with SMTP id v2mr11902989pgl.149.1592807634267; Sun, 21 Jun 2020 23:33:54 -0700 (PDT) Received: from hsinchu02.internal.sifive.com (114-34-229-221.HINET-IP.hinet.net. [114.34.229.221]) by smtp.gmail.com with ESMTPSA id w11sm12530999pfi.93.2020.06.21.23.33.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Jun 2020 23:33:53 -0700 (PDT) From: Zong Li To: paul.walmsley@sifive.com, palmer@dabbelt.com, mick@ics.forth.gr, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Zong Li Subject: [PATCH v2 0/2] Add STRICT_DEVMEM support on RISC-V Date: Mon, 22 Jun 2020 14:33:48 +0800 Message-Id: X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch set adds devmem_is_allowed to support STRICT_DEVMEM. In devmem_is_allowed, it invokes page_is_ram to check the specific address whether registered as System RAM in iomem_resource. The resource initialization is in kexec/kdump patch series which is reviewing, page_is_ram checking is no use until it is merged. Zong Li (2): riscv: Support CONFIG_STRICT_DEVMEM riscv: mm: refine the Makefile arch/riscv/Kconfig | 1 + arch/riscv/include/asm/io.h | 2 ++ arch/riscv/mm/Makefile | 5 +---- arch/riscv/mm/mmap.c | 24 ++++++++++++++++++++++++ 4 files changed, 28 insertions(+), 4 deletions(-) create mode 100644 arch/riscv/mm/mmap.c -- 2.27.0