From patchwork Fri Jun 3 18:13:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geoff Levand X-Patchwork-Id: 69270 Delivered-To: patch@linaro.org Received: by 10.140.106.246 with SMTP id e109csp392599qgf; Fri, 3 Jun 2016 11:16:15 -0700 (PDT) X-Received: by 10.36.150.129 with SMTP id z123mr1325045itd.85.1464977771209; Fri, 03 Jun 2016 11:16:11 -0700 (PDT) Return-Path: Received: from bombadil.infradead.org (bombadil.infradead.org. [2001:1868:205::9]) by mx.google.com with ESMTPS id as6si7012475pac.173.2016.06.03.11.16.11 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 Jun 2016 11:16:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) smtp.mailfrom=linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1b8tci-0006aH-Ek; Fri, 03 Jun 2016 18:15:08 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1b8tbP-000540-FY; Fri, 03 Jun 2016 18:13:47 +0000 Received: from geoff by merlin.infradead.org with local (Exim 4.85_2 #1 (Red Hat Linux)) id 1b8tbJ-0008UH-Ib; Fri, 03 Jun 2016 18:13:41 +0000 Message-Id: <9e75a7b75b38b37ded3e361498eaf1486107ce5d.1464974516.git.geoff@infradead.org> In-Reply-To: References: From: Geoff Levand Patch-Date: Mon, 23 May 2016 08:43:55 +0900 Subject: [PATCH v17 10/13] arm64: kdump: add VMCOREINFO for user-space coredump tools To: Catalin Marinas , Will Deacon Date: Fri, 03 Jun 2016 18:13:41 +0000 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: Mark Rutland , marc.zyngier@arm.com, kexec@lists.infradead.org, AKASHI Takahiro , James Morse , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org From: AKASHI Takahiro For the current crash utility, we need to know, at least, a value of "kimage_voffset" to handle the contents of core dump file (/proc/vmcore) correctly due to the introduction of KASLR (CONFIG_RANDOMIZE_BASE) in v4.6. More VMCOREINFO may be added later for makedumpfile command. --- arch/arm64/kernel/machine_kexec.c | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.5.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 92e8a92..ac3655f 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -22,6 +22,7 @@ #include #include +#include #include #include @@ -299,3 +300,10 @@ void machine_crash_shutdown(struct pt_regs *regs) pr_info("Starting crashdump kernel...\n"); } + +void arch_crash_save_vmcoreinfo(void) +{ + /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */ + vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n", + kimage_voffset); +}