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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 39B35C04E84 for ; Fri, 17 May 2019 16:47:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0D2242168B for ; Fri, 17 May 2019 16:47:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="ZhDwx/7u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727614AbfEQQr5 (ORCPT ); Fri, 17 May 2019 12:47:57 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:34589 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725933AbfEQQrz (ORCPT ); Fri, 17 May 2019 12:47:55 -0400 Received: by mail-pf1-f196.google.com with SMTP id n19so3962284pfa.1 for ; Fri, 17 May 2019 09:47:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=hE0fe9lMVv6/FQxLkF3fQ4UQY6bw1uWnd2q8EpUNjIc=; b=ZhDwx/7uQqUnTIHD1PA1Upu1Y8Z3YXS3B9HztVGpVhQ1tAXH449NhmdQCurju4ZJB9 vNhIXcRedwThXY2BekwHNiWsmcH7xI5RXQTxVxFuMqKhuiq90bGAcOc8hj9Vd5FEss09 u6kj7HIYJx12jSex16z82pa6RCUW1/cmEbwHk= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=hE0fe9lMVv6/FQxLkF3fQ4UQY6bw1uWnd2q8EpUNjIc=; b=Hqpv9ld8eenymc7KUM3nCKdQAoAR7wl2SoFf96XU6peTtFL5wd7/EW+Yfq1H6Ooa45 JlInKOghhC3SzZ48aWCpubF1tbeNG3wgG5fH7WDlx9ixtdyktZTs2WRq4E98Spi3tK8R yrsz5K1RpH7rPPqauRD1dzHpCacUoFgZW1JkjCxmomT/4KAw5lDAHi2OXnidNA4oh0MC eRvd7lU4maNV70B+kTf81g2ppvK5QDbu2pGM7B4PF7hYRKo6kXOL4b6mU9Nri8vCtyHP 4Lm/aJWt1edL+YRAy36zp340DYWcABWxrqw5Im3FGJrkJ3RVlmzn/KFAZuUVM0woaGtS 1EwA== X-Gm-Message-State: APjAAAVUYvrJguFJdOtW8gibTVFJ495ppV5x0AGOPYwproI4VFNZ8NV5 Vv+tOmDeW9XbaUHjIZqcEJmXmsJrUpYoVQ== X-Google-Smtp-Source: APXvYqzuCXeovIOaR4RbpVXx1csND1I5sP1Zmc0ZU68p58V4I5232ilFAA9A/gPdohyIIkl9VXHhPQ== X-Received: by 2002:a63:785:: with SMTP id 127mr54984321pgh.230.1558111674612; Fri, 17 May 2019 09:47:54 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id l141sm12229810pfd.24.2019.05.17.09.47.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 17 May 2019 09:47:54 -0700 (PDT) From: Stephen Boyd To: linux-kernel@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Evan Green , Rob Herring , Bjorn Andersson , Andy Gross , Will Deacon , Catalin Marinas , Dan Williams Subject: [RFC/PATCH 4/5] arm64: Add support for arch_memremap_ro() Date: Fri, 17 May 2019 09:47:45 -0700 Message-Id: <20190517164746.110786-5-swboyd@chromium.org> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog In-Reply-To: <20190517164746.110786-1-swboyd@chromium.org> References: <20190517164746.110786-1-swboyd@chromium.org> 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 Pass in PAGE_KERNEL_RO to the underlying IO mapping mechanism to get a read-only mapping for the MEMREMAP_RO type of memory mappings that memremap() supports. Cc: Evan Green Cc: Rob Herring Cc: Bjorn Andersson Cc: Andy Gross Cc: Will Deacon Cc: Catalin Marinas Cc: Dan Williams Signed-off-by: Stephen Boyd --- arch/arm64/include/asm/io.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 8bb7210ac286..245bd371e8dc 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -185,6 +185,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size); #define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC)) #define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) +#define arch_memremap_ro(addr, size) __ioremap((addr), (size), PAGE_KERNEL_RO) #define iounmap __iounmap /* -- Sent by a computer through tubes