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[209.132.180.67]) by mx.google.com with ESMTP id t27si38557021pfa.146.2016.11.24.02.01.16; Thu, 24 Nov 2016 02:01:16 -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 dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938493AbcKXKBO (ORCPT + 7 others); Thu, 24 Nov 2016 05:01:14 -0500 Received: from mail-pf0-f178.google.com ([209.85.192.178]:33545 "EHLO mail-pf0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936356AbcKXKBO (ORCPT ); Thu, 24 Nov 2016 05:01:14 -0500 Received: by mail-pf0-f178.google.com with SMTP id d2so9450659pfd.0 for ; Thu, 24 Nov 2016 02:00:19 -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=u84Agd6tREXx0Zn++0jLWxnm+2D8cTxGRu+OCHR9N1I=; b=AgpLPsunt53H91hvu8uECcYjsUuMbwyU7F5bXkaHRZo+8DUwU6a7HyGUz/9P4X653+ zeQetTS/ox8hMh7iRhQicJ1s9d3VDMhXVwUXX7aSnIVjJb7GS7ryGdHCVajaWSFC+DK+ OT/WYi1QaGxmwzUFB2KaWSCfhlU6LPaErtSZc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=u84Agd6tREXx0Zn++0jLWxnm+2D8cTxGRu+OCHR9N1I=; b=ir3oRLofG9PkFKDUfDPjTWP3XzCaBt4dtDLPGAsYO5X+2NGhmiPX4mD9S1bdeLHRLO GrttzU2s7wx7Y5GuKvfqoyOSh8R0hU1ZelHcbVPjZ+EXOfjFg3CyYUgcriinHGDayzcA sP8poaxEhHQ0ahi//ZhgXMNSg/3lpI8oam/k3f8z0tIXg2udPYZjPFvVETmis0gHVC2t MORO6NPcxTzXGszNWjmhpFToFGi/Tu+NJveb3dPJfrMnp/ALt+uMQVs7SwRwQvkrJxae 8Pl8Te73iEeW/2vKBTj1noof9mN5LLk16ESWqciH51A2Z0Rz/3SSk+YImAJVak86qeNw H1Iw== X-Gm-Message-State: AKaTC005P0lKmQ11D/PevrwmckVnm2cemLidwVlP/wNg9xRRXQI2hE4H5IdYPe4wHj8Fyotw X-Received: by 10.84.217.20 with SMTP id o20mr3645053pli.28.1479981619412; Thu, 24 Nov 2016 02:00:19 -0800 (PST) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id l11sm59004888pfb.28.2016.11.24.02.00.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 24 Nov 2016 02:00:18 -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 v28 9/9] Documentation: dt: chosen properties for arm64 kdump Date: Thu, 24 Nov 2016 18:59:44 +0900 Message-Id: <20161124095944.7167-1-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20161124095523.6972-1-takahiro.akashi@linaro.org> References: <20161124095523.6972-1-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 linux,crashkernel-base and crashkernel-size, linux,usable-memory-range linux,elfcorehdr used by arm64 kdump to decribe the kdump reserved area, and the elfcorehdr's location within it. Signed-off-by: James Morse [takahiro.akashi@linaro.org: added "linux,crashkernel-base" and "-size" ] Signed-off-by: AKASHI Takahiro Cc: devicetree@vger.kernel.org Cc: Rob Herring Cc: Mark Rutland --- Documentation/devicetree/bindings/chosen.txt | 50 ++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) -- 2.10.0 -- 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 6ae9d82..7b11516 100644 --- a/Documentation/devicetree/bindings/chosen.txt +++ b/Documentation/devicetree/bindings/chosen.txt @@ -52,3 +52,53 @@ 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,crashkernel-base +linux,crashkernel-size +---------------------- + +These properties (currently used on PowerPC and arm64) indicates +the base address and the size, respectively, of the reserved memory +range for crash dump kernel. +e.g. + +/ { + chosen { + linux,crashkernel-base = <0x9 0xf0000000>; + linux,crashkernel-size = <0x0 0x10000000>; + }; +}; + +linux,usable-memory-range +------------------------- + +This property (currently used only on arm64) holds the memory range, +the base address and the size, which can be used as system ram on +the *current* kernel. Note that, if this property is present, any memory +regions under "memory" nodes in DT blob or ones marked as "conventional +memory" in EFI memory map should be ignored. +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>; + }; +};