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=-10.1 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 4DF19C49ED7 for ; Tue, 10 Sep 2019 16:09:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A3BE206A1 for ; Tue, 10 Sep 2019 16:09:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="T2zSyHcE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2436735AbfIJQJP (ORCPT ); Tue, 10 Sep 2019 12:09:15 -0400 Received: from mail-pg1-f194.google.com ([209.85.215.194]:39300 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2436698AbfIJQJJ (ORCPT ); Tue, 10 Sep 2019 12:09:09 -0400 Received: by mail-pg1-f194.google.com with SMTP id u17so9977640pgi.6 for ; Tue, 10 Sep 2019 09:09:08 -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=BXles0cH5YGr7OfqkOJ72KVG5DkMe0UjZVzH2kBE6hs=; b=T2zSyHcEiyCtbS8xoj/ECUACFJexd7ZGxA/Cwu1Ed2uaIIhPjEgfE8/61M2nZVJLBm naR6pG28QpnVsTp2W51i+6ULyNWT6kVyhO8VoOvzKVTHc5F2cwDTufQa4OF3FyYP04dk APV2Ac6LXoj1jxXRVHsGEBPoEuvTGMNcF+7Lc= 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=BXles0cH5YGr7OfqkOJ72KVG5DkMe0UjZVzH2kBE6hs=; b=HBCggyO3eGXblb80Na3sZ28wDRmw+4G1GIRxePiEsZa18+lGUYt34rb+qzaUVcQfMg kl++StwOdD/YsUAJ7a0LpCaonq2D+uvsOHMATC/unkXrs+QS14fFvbwrBtXTVEbjYoDG TaiXFNTCjXwsyu0QNZQj29ILdMs+/16kRi7pJxOhTVA9YciqjLmUo9WlYXf4pyQSDyUi GmEawzLpK8xxFglf4vgaIUPHP0h+klCWwqtaMLDJbeBgFvo8+cZ/jR90HCgQcscudry2 fRJSFb7ictzxUwy4RgU15vXFq2I+ieUc1SFf+/rJC3+v6A5OKUVrbpflkXEaLCimlJCv kePg== X-Gm-Message-State: APjAAAU3XCyt+V6m8P0nKzBzOyUydDZAbt3hA3XwjovKnJXO0HgXf1dn bPBtcYysZgeLk4Mp8n1GiYVqeQ== X-Google-Smtp-Source: APXvYqwdWlZubSWHnT9D8yZ1LDDemTMKo+tmMy94vJ9+/SnQHMWaD5lO6RzbXotNH1LnwMd6vahwOA== X-Received: by 2002:a65:4b89:: with SMTP id t9mr28326267pgq.55.1568131748161; Tue, 10 Sep 2019 09:09:08 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id em21sm106088pjb.31.2019.09.10.09.09.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Sep 2019 09:09:07 -0700 (PDT) From: Stephen Boyd To: Dan Williams Cc: linux-kernel@vger.kernel.org, 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 Subject: [PATCH v3 4/5] arm64: Add support for arch_memremap_ro() Date: Tue, 10 Sep 2019 09:09:02 -0700 Message-Id: <20190910160903.65694-5-swboyd@chromium.org> X-Mailer: git-send-email 2.23.0.162.g0b9fbb3734-goog In-Reply-To: <20190910160903.65694-1-swboyd@chromium.org> References: <20190910160903.65694-1-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 Reviewed-by: Bjorn Andersson Acked-by: Catalin Marinas 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 7ed92626949d..c623e75d9152 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -172,6 +172,7 @@ 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