From patchwork Fri Jun 14 20:37:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 10996559 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E847112C for ; Fri, 14 Jun 2019 20:37:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1F89528733 for ; Fri, 14 Jun 2019 20:37:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 13FCE2876E; Fri, 14 Jun 2019 20:37:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B294328733 for ; Fri, 14 Jun 2019 20:37:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727484AbfFNUhZ (ORCPT ); Fri, 14 Jun 2019 16:37:25 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:33878 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727660AbfFNUhX (ORCPT ); Fri, 14 Jun 2019 16:37:23 -0400 Received: by mail-pl1-f195.google.com with SMTP id i2so1466502plt.1 for ; Fri, 14 Jun 2019 13:37:23 -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=ctzVWLxLHqItydbbPUXjVh0gv8n1U7GRnaTqF8ILaog=; b=BDM1M+271IQoGfkSDrl85T8Rg7KP/lRKJEOPCJCfChPITi0i6Zs3pcycaA0GBFCgll ZQD1tlZUFKuxGUoqIjPaF/Qk+ZU199aERuJ0yHM5V4ez2VXIdzvl/L2iaeThCLAIVS2b DdSbS6oQg5U5nGMrQ1vc6prTrvy5arXwJE6ZU= 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=ctzVWLxLHqItydbbPUXjVh0gv8n1U7GRnaTqF8ILaog=; b=Wn8VF5oQdFouE9BLPo4tOYcDRGFzCsAbZFTTYgrMKxUTwRj7Y2MAgm44z6oknUPYSB 52qT209X+Ye4cuFDwRczOTj2ETTLADNLjQpyE4nVN+bnK453TLUw0pNNwfdiKzoNEEe+ HG53ZQNXpLpLggt7JiPDphxH9Q/mq/6UXzqJJrhPKvwWvTGdNWsaYp31fTpl1yH8ez0l FsxjknDpVOsJY8Es4tCohxYe7BqT1JelrlBpEJPqOzBEJ7xKVppmFVicIPEPSnsH7DRe KgRfqW5Zw8SBm6NvkAXQfzF7orkj0TprpEyDNbr40u9Emcc1pQAJPCQvNRw/ud3Pe0xi FdEA== X-Gm-Message-State: APjAAAVpNjbLbis4KZ2izoOmvYl40sgLXTOJiiTl2eL9fKNpZ7HmL5M8 Ux6ntptBVa4u4j5V4wlTOhVCZA== X-Google-Smtp-Source: APXvYqw21FhItxYFfLoN4gG820hTamDRhMvYBgFH74z4L0jEESW79mOUdZTsiokL1tAuHIASvtvreQ== X-Received: by 2002:a17:902:f204:: with SMTP id gn4mr77051069plb.3.1560544642914; Fri, 14 Jun 2019 13:37:22 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id x5sm3673187pjp.21.2019.06.14.13.37.22 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 14 Jun 2019 13:37:22 -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 v2 4/5] arm64: Add support for arch_memremap_ro() Date: Fri, 14 Jun 2019 13:37:16 -0700 Message-Id: <20190614203717.75479-5-swboyd@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190614203717.75479-1-swboyd@chromium.org> References: <20190614203717.75479-1-swboyd@chromium.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 b807cb9b517d..cc33f4c8647b 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -183,6 +183,7 @@ 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 /*