From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f175.google.com (mail-pd0-f175.google.com [209.85.192.175]) by kanga.kvack.org (Postfix) with ESMTP id 8BD666B0039 for ; Wed, 22 Jan 2014 06:32:06 -0500 (EST) Received: by mail-pd0-f175.google.com with SMTP id w10so255845pde.6 for ; Wed, 22 Jan 2014 03:32:06 -0800 (PST) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com. [119.145.14.66]) by mx.google.com with ESMTPS id yd9si9446968pab.263.2014.01.22.03.31.43 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 22 Jan 2014 03:32:05 -0800 (PST) From: Wang Nan Subject: [PATCH 0/3] Bugfix for kdump on arm Date: Wed, 22 Jan 2014 19:25:13 +0800 Message-ID: <1390389916-8711-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: kexec@lists.infradead.org Cc: Eric Biederman , Russell King , Andrew Morton , Geng Hui , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Wang Nan This patch series introduce 3 bugfix for kdump (and kexec) on arm platform. kdump for arm in fact is corrupted (at least for omap4460). With one-month hard work and with the help of a jtag debugger, we finally make kdump works reliablly. Following is the patches. The first 2 patches forms a group, it allow ioremap_nocache to be taken on reserved pages on arm platform (which is prohibited by 309caa9cc) and then use ioremap_nocache to copy kexec required code. The last 1 is for crash dump kernel. It allow kernel to be loaded in the middle of kernel awared physical memory. Without it, crashdump kernel must be carefully configured to boot. Wang Nan (3): ARM: Premit ioremap() to map reserved pages ARM: kexec: copying code to ioremapped area ARM: allow kernel to be loaded in middle of phymem arch/arm/kernel/machine_kexec.c | 18 ++++++++++++++++-- arch/arm/mm/init.c | 21 ++++++++++++++++++++- arch/arm/mm/ioremap.c | 2 +- arch/arm/mm/mmu.c | 13 +++++++++++++ kernel/kexec.c | 40 +++++++++++++++++++++++++++++++++++----- mm/page_alloc.c | 7 +++++-- 6 files changed, 90 insertions(+), 11 deletions(-) Signed-off-by: Wang Nan Cc: Eric Biederman Cc: Russell King Cc: Andrew Morton Cc: Geng Hui -- 1.8.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org