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[209.132.180.67]) by mx.google.com with ESMTP id w23si19078117plk.164.2017.02.01.04.47.05; Wed, 01 Feb 2017 04:47:05 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751870AbdBAMrE (ORCPT + 7 others); Wed, 1 Feb 2017 07:47:04 -0500 Received: from mail-pg0-f53.google.com ([74.125.83.53]:33240 "EHLO mail-pg0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751866AbdBAMrD (ORCPT ); Wed, 1 Feb 2017 07:47:03 -0500 Received: by mail-pg0-f53.google.com with SMTP id 204so109265403pge.0 for ; Wed, 01 Feb 2017 04:46:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=wCy1oA4FJqwEjNNSBfsy/wL1vp+hublTUwyYoXGlEJQ=; b=RU0kNC1/PpLeD2PK26gwg050msmyDoeaXSH6pXt409GEve1nRLbGWXaWi989wXZQqE 9fPsIKjH5dsEbUfQOgu9so1SIT/kYHfGztaNjRbhC84rZ66AOWoYbMALDApgOx81XAKg PDOgkDSB1GTmlrAMpc8D1/bMDwnyOM5fujJyY= 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; bh=wCy1oA4FJqwEjNNSBfsy/wL1vp+hublTUwyYoXGlEJQ=; b=qJSoVG0lfAKlPoAUxECXqd4Bb5muM6GQum2JR3V9VFWtKNHIhH9XjZ6H5aBLAeUS3b FqwABQcEBgQPbi+dSMSuL75CpLRjmPaK+HgOWgbFuFiUXAIGZDVAIw/AEQPnxDzK2pNx Q5JCUKxywCSCF0Xb//0ES3YVvU+4bdPvvcWvq0KmhW7LqwlQx4z4mR6fvmHswqznRDpV 7oCUvseMqDTBsQaQjYBcsoy8uNt7EFnGvZz6PNQXiiEHGPkJWMukt5G8USLqqc1gX7zk KlGD+9yOGO1oXUG59Tf51ZPQ46+ulftMWxZX23dUJE+cLdZckJyxt4qAHjJbBx4KqtOM PMtw== X-Gm-Message-State: AIkVDXLto4epa8RBL+mUR3r3X4Mep9iTNMPL4UfuOINzQmHjm5kY4joNJNaHSsN4erXZY15/ X-Received: by 10.84.224.134 with SMTP id s6mr4192794plj.49.1485953217527; Wed, 01 Feb 2017 04:46:57 -0800 (PST) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id h4sm49464574pfk.96.2017.02.01.04.46.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Feb 2017 04:46:57 -0800 (PST) From: AKASHI Takahiro To: catalin.marinas@arm.com, will.deacon@arm.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: james.morse@arm.com, geoff@infradead.org, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, AKASHI Takahiro Subject: [PATCH v31 12/12] Documentation: dt: chosen properties for arm64 kdump Date: Wed, 1 Feb 2017 21:48:20 +0900 Message-Id: <20170201124820.6094-1-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170201124218.5823-1-takahiro.akashi@linaro.org> References: <20170201124218.5823-1-takahiro.akashi@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: James Morse Add documentation for DT properties: linux,usable-memory-range linux,elfcorehdr used by arm64 kdump. Those decribe the usable memory range for crash dump kernel and the elfcorehdr's location within it, respectively. Signed-off-by: James Morse [takahiro.akashi@linaro.org: added "linux,crashkernel-base" and "-size" ] Signed-off-by: AKASHI Takahiro Acked-by: Mark Rutland Cc: devicetree@vger.kernel.org Cc: Rob Herring --- Documentation/devicetree/bindings/chosen.txt | 37 ++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt index 6ae9d82d4c37..8dc82431acc1 100644 --- a/Documentation/devicetree/bindings/chosen.txt +++ b/Documentation/devicetree/bindings/chosen.txt @@ -52,3 +52,40 @@ This property is set (currently only on PowerPC, and only needed on book3e) by some versions of kexec-tools to tell the new kernel that it is being booted by kexec, as the booting environment may differ (e.g. a different secondary CPU release mechanism) + +linux,usable-memory-range +------------------------- + +This property (arm64 only) holds a base address and size, describing a +limited region in which memory may be considered available for use by +the kernel. Memory outside of this range is not available for use. + +This property describes a limitation: memory within this range is only +valid when also described through another mechanism that the kernel +would otherwise use to determine available memory (e.g. memory nodes +or the EFI memory map). Valid memory may be sparse within the range. +e.g. + +/ { + chosen { + linux,usable-memory-range = <0x9 0xf0000000 0x0 0x10000000>; + }; +}; + +The main usage is for crash dump kernel to identify its own usable +memory and exclude, at its boot time, any other memory areas that are +part of the panicked kernel's memory. + +linux,elfcorehdr +---------------- + +This property (currently used only on arm64) holds the memory range, +the address and the size, of the elf core header which mainly describes +the panicked kernel's memory layout as PT_LOAD segments of elf format. +e.g. + +/ { + chosen { + linux,elfcorehdr = <0x9 0xfffff000 0x0 0x800>; + }; +};