From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Catalin Marinas , Will Deacon , Matthias Brugger Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com, Miles Chen List-Id: linux-mediatek@lists.infradead.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