Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758836AbXITRTz (ORCPT ); Thu, 20 Sep 2007 13:19:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757313AbXITRSz (ORCPT ); Thu, 20 Sep 2007 13:18:55 -0400 Received: from ns.suse.de ([195.135.220.2]:50655 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755288AbXITRSs (ORCPT ); Thu, 20 Sep 2007 13:18:48 -0400 Message-Id: <20070920171846.479697000@stravinsky.suse.de> References: <20070920171845.774383000@stravinsky.suse.de> User-Agent: quilt/0.46-47.1 Date: Thu, 20 Sep 2007 19:18:48 +0200 From: Bernhard Walle To: kexec@lists.infradead.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, discuss@x86-64.org Subject: [patch 3/7] Use extended crashkernel command line on x86_64 Content-Disposition: inline; filename=crashkernel-x86_64 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3636 Lines: 127 This patch removes the crashkernel parsing from arch/x86_64/kernel/machine_kexec.c and calls the generic function, introduced in the last patch, in setup_bootmem_allocator(). This is necessary because the amount of System RAM must be known in this function now because of the new syntax. Signed-off-by: Bernhard Walle --- arch/x86_64/kernel/e820.c | 3 +- arch/x86_64/kernel/machine_kexec.c | 27 ------------------------- arch/x86_64/kernel/setup.c | 39 ++++++++++++++++++++++++++++++------- 3 files changed, 34 insertions(+), 35 deletions(-) --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -226,7 +226,8 @@ void __init e820_reserve_resources(void) request_resource(res, &code_resource); request_resource(res, &data_resource); #ifdef CONFIG_KEXEC - request_resource(res, &crashk_res); + if (crashk_res.start != crashk_res.end) + request_resource(res, &crashk_res); #endif } } --- a/arch/x86_64/kernel/machine_kexec.c +++ b/arch/x86_64/kernel/machine_kexec.c @@ -231,33 +231,6 @@ NORET_TYPE void machine_kexec(struct kim image->start); } -/* crashkernel=size@addr specifies the location to reserve for - * a crash kernel. By reserving this memory we guarantee - * that linux never set's it up as a DMA target. - * Useful for holding code to do something appropriate - * after a kernel panic. - */ -static int __init setup_crashkernel(char *arg) -{ - unsigned long size, base; - char *p; - if (!arg) - return -EINVAL; - size = memparse(arg, &p); - if (arg == p) - return -EINVAL; - if (*p == '@') { - base = memparse(p+1, &p); - /* FIXME: Do I want a sanity check to validate the - * memory range? Yes you do, but it's too early for - * e820 -AK */ - crashk_res.start = base; - crashk_res.end = base + size - 1; - } - return 0; -} -early_param("crashkernel", setup_crashkernel); - void arch_crash_save_vmcoreinfo(void) { #ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -196,6 +196,37 @@ static inline void copy_edd(void) } #endif +#ifdef CONFIG_KEXEC +static void __init reserve_crashkernel(void) +{ + unsigned long long free_mem; + unsigned long long crash_size, crash_base; + int ret; + + free_mem = max_low_pfn << PAGE_SHIFT; + + ret = parse_crashkernel(boot_command_line, free_mem, + &crash_size, &crash_base); + if (ret == 0 && crash_size) { + if (crash_base > 0) { + printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crash_base >> 20), + (unsigned long)(free_mem >> 20)); + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + reserve_bootmem(crash_base, crash_size); + } else + printk(KERN_INFO "crashkernel reservation failed - " + "you have to specify a base address\n"); + } +} +#else +static inline void __init reserve_crashkernel(void) +{} +#endif + #define EBDA_ADDR_POINTER 0x40E unsigned __initdata ebda_addr; @@ -388,13 +419,7 @@ void __init setup_arch(char **cmdline_p) } } #endif -#ifdef CONFIG_KEXEC - if (crashk_res.start != crashk_res.end) { - reserve_bootmem_generic(crashk_res.start, - crashk_res.end - crashk_res.start + 1); - } -#endif - + reserve_crashkernel(); paging_init(); #ifdef CONFIG_PCI -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/