From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0213C04EB8 for ; Wed, 12 Dec 2018 10:56:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73FCF20839 for ; Wed, 12 Dec 2018 10:56:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 73FCF20839 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727198AbeLLK46 (ORCPT ); Wed, 12 Dec 2018 05:56:58 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:41859 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726791AbeLLK45 (ORCPT ); Wed, 12 Dec 2018 05:56:57 -0500 X-UUID: e75b33134e604f8288fe585d2bd6fb8e-20181212 X-UUID: e75b33134e604f8288fe585d2bd6fb8e-20181212 Received: from mtkcas08.mediatek.inc [(172.21.101.126)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 446859826; Wed, 12 Dec 2018 18:56:53 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 12 Dec 2018 18:56:50 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 12 Dec 2018 18:56:51 +0800 From: Miles Chen To: Catalin Marinas , Will Deacon , Matthias Brugger CC: , , , , Miles Chen Subject: [PATCH] arm64: kaslr: print PHYS_OFFSET in dump_kernel_offset() Date: Wed, 12 Dec 2018 18:56:49 +0800 Message-ID: <1544612209-13660-1-git-send-email-miles.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain X-TM-SNTS-SMTP: 5C17EFA49BFC5B10294428546CA39A4491BDC7A3175BB255EF1A6BC31283A15A2000:8 X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When debug with kaslr, it is sometimes necessary to have PHYS_OFFSET to perform linear virtual address to physical address translation. Sometimes we're debugging with only few information such as a kernel log and a symbol file, print PHYS_OFFSET in dump_kernel_offset() for that case. Tested by: echo c > /proc/sysrq-trigger [ 11.996161] SMP: stopping secondary CPUs [ 11.996732] Kernel Offset: 0x2522200000 from 0xffffff8008000000 [ 11.996881] PHYS_OFFSET: 0xffffffeb40000000 Signed-off-by: Miles Chen Tested-by: Miles Chen --- arch/arm64/kernel/setup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index f4fc1e0544b7..4b0e1231625c 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -388,6 +388,7 @@ static int dump_kernel_offset(struct notifier_block *self, unsigned long v, if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && offset > 0) { pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n", offset, KIMAGE_VADDR); + pr_emerg("PHYS_OFFSET: 0x%llx\n", PHYS_OFFSET); } else { pr_emerg("Kernel Offset: disabled\n"); } -- 2.18.0