From patchwork Wed Jul 6 07:52:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 9215645 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 4C0EE60752 for ; Wed, 6 Jul 2016 07:50:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3F65D2874E for ; Wed, 6 Jul 2016 07:50:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 343842875D; Wed, 6 Jul 2016 07:50:53 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D14092874E for ; Wed, 6 Jul 2016 07:50:52 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bKhaG-0006rq-ST; Wed, 06 Jul 2016 07:49:24 +0000 Received: from mail-pa0-x231.google.com ([2607:f8b0:400e:c03::231]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bKhZu-0006Ae-3E for linux-arm-kernel@lists.infradead.org; Wed, 06 Jul 2016 07:49:06 +0000 Received: by mail-pa0-x231.google.com with SMTP id bz2so74638563pad.1 for ; Wed, 06 Jul 2016 00:48:41 -0700 (PDT) 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=/FPfmAAJG7R9mCli4ZR8ayUGAdWaNX4oOp3vX9Zknv0=; b=Qi6bTZlp5Ca7rY19a7qCks4EkGb5zzWAQwvSjzWzm5RnTLl1HONGOIKzxrrHCGDeGY S3w7dz5NeDTfWMNtzXOx9bWODIiutDpLMHNOHricgDCyO7PNPCbPK+xUI6AlXYFpZH+9 aItMgIJt9EZrPaR/DL96m5RShDkB9OpF/8AW0= 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=/FPfmAAJG7R9mCli4ZR8ayUGAdWaNX4oOp3vX9Zknv0=; b=Cuv4xs4g53OASwNGbvC27u8QTWIGw58RGf6mNA0W7JMGrNHII7yMxCSDGHLD2G6+1z AcgfZrU6jVqO0TRhubttH4abILKo4w/dyg/K/zTnW9xMjMr7SB7huvpPoD4rq+Ke09Kg BP/raKVFJLzL+vyVmuq5YwKlErt/J4E5c/mdSB/3Y/AJCZ7LSSUuzXVy/qYr8yrBAHuW 76EK9JiHCon8QpJb/6udMj0IpLNsKzudLu3wSzPCBVxnRV3Vh0IchK8S5k0zRTnuQXlg DLIHKxVNKqaM44HC6fYa3Py686T5bJENWiMNqmSOElTaT2WeYweeaqDjSQpnaQSc93IC ceeA== X-Gm-Message-State: ALyK8tJWX7w0m+gpAoTGroJeDgbue+qG6/b8mGmWSqoK1YODsbdRRGd0qR1Okmx3C5FnWSWZ X-Received: by 10.66.11.234 with SMTP id t10mr14431717pab.66.1467791321341; Wed, 06 Jul 2016 00:48:41 -0700 (PDT) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id z189sm2502729pfb.34.2016.07.06.00.48.40 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Wed, 06 Jul 2016 00:48:40 -0700 (PDT) From: AKASHI Takahiro To: catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH v21 5/8] arm64: kdump: add VMCOREINFO's for user-space coredump tools Date: Wed, 6 Jul 2016 16:52:23 +0900 Message-Id: <20160706075226.27609-6-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20160706075226.27609-1-takahiro.akashi@linaro.org> References: <20160706075226.27609-1-takahiro.akashi@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160706_004902_497889_ADEEDFF1 X-CRM114-Status: GOOD ( 10.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: geoff@infradead.org, kexec@lists.infradead.org, james.morse@arm.com, linux-arm-kernel@lists.infradead.org, AKASHI Takahiro 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 For the current crash utility, we need to know, at least, - kimage_voffset - PHYS_OFFSET to handle the contents of core dump file (/proc/vmcore) correctly due to the introduction of KASLR (CONFIG_RANDOMIZE_BASE) in v4.6. This patch puts them as VMCOREINFO's into the file. - VA_BITS is also added for makedumpfile command. More VMCOREINFO's may be added later. Signed-off-by: AKASHI Takahiro --- arch/arm64/kernel/machine_kexec.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 8ac9dba8..38b4411 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -17,6 +17,7 @@ #include #include +#include #include #include "cpu-reset.h" @@ -260,3 +261,13 @@ void machine_crash_shutdown(struct pt_regs *regs) pr_info("Starting crashdump kernel...\n"); } + +void arch_crash_save_vmcoreinfo(void) +{ + VMCOREINFO_NUMBER(VA_BITS); + /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */ + vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n", + kimage_voffset); + vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n", + PHYS_OFFSET); +}