From patchwork Tue Feb 7 08:09:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 9559411 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 CC52960572 for ; Tue, 7 Feb 2017 08:27:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA25F281DB for ; Tue, 7 Feb 2017 08:27:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AC1622818B; Tue, 7 Feb 2017 08:27:10 +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 0875D281DB for ; Tue, 7 Feb 2017 08:27:09 +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 1cb17B-0007wr-M7; Tue, 07 Feb 2017 08:27:05 +0000 Received: from merlin.infradead.org ([205.233.59.134]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cb172-0007nK-CL for linux-arm-kernel@bombadil.infradead.org; Tue, 07 Feb 2017 08:26:56 +0000 Received: from mail-pf0-x231.google.com ([2607:f8b0:400e:c00::231]) by merlin.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cb0sD-0000In-Pd for linux-arm-kernel@lists.infradead.org; Tue, 07 Feb 2017 08:11:38 +0000 Received: by mail-pf0-x231.google.com with SMTP id y143so31350471pfb.0 for ; Tue, 07 Feb 2017 00:11:17 -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=ouq/XKtWKsJfyWgF5JMhaPgDywOC8mjvmrBuFrhc2no=; b=PIrrEKeTw65UkphW+NCaY3Ioj1eQqiCF05W/SSi25QUJ2kyOa5pD1iqOcjSbCN403h +F+9VYyshbGu202o+zHdrJoWXZYBOrBr5UD6g8iul+9nK3ebxD2Z+IOE36JBSvInw/22 TmqEOjQZfXYYJ9nyHIA+SstOnNmwzhobKXl1I= 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=ouq/XKtWKsJfyWgF5JMhaPgDywOC8mjvmrBuFrhc2no=; b=CMnJ8iIcCiWVk64RWB3njoQttCUmTHhLwHj+3J3Os0prslkfX+/F8Lnef+Km4O7WMf PWXEDUfGMb5gwtl+xV+HHDTJei4USzzT3FSnTO7FEOtKPsxq4E59nXTUBosqYcA4yJuo vhe8JWbGgkH9x0+hHei+8fcwtDZznBtFptsmsIGyRp3u/FTBInf4yVSBCLjTYq7JgnFo x/dKdHswq75HfmVv960utyoLKnNTdKB9O2TCJF0HxtDo29zZE43AzmHUX+wEGplaQ/XA qgEJIcdZoX8ZO7nny8rRmcOhoUZwiNP6B9sGceRHkiIoFKTFEyZcrI41v2dvI/FQLOKX na+w== X-Gm-Message-State: AIkVDXLC7wlIfH+ipTBe0VkjOxpMxaItJ++POjfWjHF8gCmWuxOV3FLBXhM9rEoC6txUkW0u X-Received: by 10.99.51.76 with SMTP id z73mr18738491pgz.137.1486454896977; Tue, 07 Feb 2017 00:08:16 -0800 (PST) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id c11sm8497186pfe.68.2017.02.07.00.08.16 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 Feb 2017 00:08:16 -0800 (PST) From: AKASHI Takahiro To: catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH v32 12/13] Documentation: kdump: describe arm64 port Date: Tue, 7 Feb 2017 17:09:04 +0900 Message-Id: <20170207080904.5974-10-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.11.1 In-Reply-To: <20170207080601.5816-1-takahiro.akashi@linaro.org> References: <20170207080601.5816-1-takahiro.akashi@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170207_031137_912877_8FB8D150 X-CRM114-Status: GOOD ( 12.00 ) 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