From patchwork Wed Feb 1 12:46:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 9549701 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B3AA060424 for ; Wed, 1 Feb 2017 13:15:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A2C1628448 for ; Wed, 1 Feb 2017 13:15:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9759A28451; Wed, 1 Feb 2017 13:15:31 +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=-1.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, T_DKIM_INVALID autolearn=no version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3E44428448 for ; Wed, 1 Feb 2017 13:15:31 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cYukx-0003eP-0P; Wed, 01 Feb 2017 13:15:27 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cYuXV-0004nV-KH for linux-arm-kernel@bombadil.infradead.org; Wed, 01 Feb 2017 13:01:33 +0000 Received: from mail-pg0-x22d.google.com ([2607:f8b0:400e:c05::22d]) by merlin.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cYuJA-0005qI-5w for linux-arm-kernel@lists.infradead.org; Wed, 01 Feb 2017 12:46:45 +0000 Received: by mail-pg0-x22d.google.com with SMTP id 14so109100591pgg.1 for ; Wed, 01 Feb 2017 04:46:23 -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=ttUIQYE/YHiXm1RkkioEAbHqZp5YZFeMA4Gx/fzFtfg=; b=E/+xLnnI5ekcarlQkQPbw1qeMS6ORaghqvxHYT3Ngd8LG4Vy04wQJ0dU8DJQPtx3J5 nW7oAXK+EHFLyDFcFrn7KOK4kxpCSKqA0vczvzUqqE4UwerkLXKAjSCs7XN25/+02fyf XxvJQovwEB444O5an+jzxL6hsV0YarCpxmd9w= 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=ttUIQYE/YHiXm1RkkioEAbHqZp5YZFeMA4Gx/fzFtfg=; b=GEau438iARC/8nAWiZHDfLoVyDjWqmSi2mEsYGynFzm35iGKHttEKrzE74oJ09OkEP as6mZcVocs9KNiAWYWlJbiVhYNFb9Tx7QEs72Jb4mPC7d5tnSS19ZR4B67bDUV8jD4eK E8k9KfyHOxbmdbRIVcWxrYKyBwOSZPxmZQsRC8I5kCRyfUqa/epGrYdR6y6F6wS7bX9B EAV2i1YX5YmvFcN/B6vKoddkCpPR9aMU21KPdmC7/Xkr4wUFbxc04V+ngXdfUwpzapSy WHSxuv/uOeoJWBqfmh5SmJnXYeBhOOErr+ol518pKI5s7Mo/dVcqeH8ADmoRY04dSUch vvKg== X-Gm-Message-State: AIkVDXLavMyu5nEj/TS8WzH7IwNPUv0Yv/8zipOCvpHONqeyhk8/4/b0GgDuxgwbRcKb+fyH X-Received: by 10.98.217.209 with SMTP id b78mr3348742pfl.53.1485953183028; Wed, 01 Feb 2017 04:46:23 -0800 (PST) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id s136sm49818860pgc.38.2017.02.01.04.46.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Feb 2017 04:46:22 -0800 (PST) From: AKASHI Takahiro To: catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH v31 11/12] Documentation: kdump: describe arm64 port Date: Wed, 1 Feb 2017 21:46:30 +0900 Message-Id: <20170201124630.6016-10-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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170201_074644_317062_FB135B4F X-CRM114-Status: GOOD ( 12.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, geoff@infradead.org, kexec@lists.infradead.org, AKASHI Takahiro , james.morse@arm.com, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add arch specific descriptions about kdump usage on arm64 to kdump.txt. Signed-off-by: AKASHI Takahiro Reviewed-by: Baoquan He Acked-by: Dave Young Acked-by: Catalin Marinas --- Documentation/kdump/kdump.txt | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt index b0eb27b956d9..615434d81108 100644 --- a/Documentation/kdump/kdump.txt +++ b/Documentation/kdump/kdump.txt @@ -18,7 +18,7 @@ memory image to a dump file on the local disk, or across the network to a remote system. Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64, -s390x and arm architectures. +s390x, arm and arm64 architectures. When the system kernel boots, it reserves a small section of memory for the dump-capture kernel. This ensures that ongoing Direct Memory Access @@ -249,6 +249,13 @@ Dump-capture kernel config options (Arch Dependent, arm) AUTO_ZRELADDR=y +Dump-capture kernel config options (Arch Dependent, arm64) +---------------------------------------------------------- + +- Please note that kvm of the dump-capture kernel will not be enabled + on non-VHE systems even if it is configured. This is because the CPU + will not be reset to EL2 on panic. + Extended crashkernel syntax =========================== @@ -305,6 +312,8 @@ Boot into System Kernel kernel will automatically locate the crash kernel image within the first 512MB of RAM if X is not given. + On arm64, use "crashkernel=Y[@X]". Note that the start address of + the kernel, X if explicitly specified, must be aligned to 2MiB (0x200000). Load the Dump-capture Kernel ============================ @@ -327,6 +336,8 @@ For s390x: - Use image or bzImage For arm: - Use zImage +For arm64: + - Use vmlinux or Image If you are using a uncompressed vmlinux image then use following command to load dump-capture kernel. @@ -370,6 +381,9 @@ For s390x: For arm: "1 maxcpus=1 reset_devices" +For arm64: + "1 maxcpus=1 reset_devices" + Notes on loading the dump-capture kernel: * By default, the ELF headers are stored in ELF64 format to support