Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764805AbXIMQQi (ORCPT ); Thu, 13 Sep 2007 12:16:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763481AbXIMQOi (ORCPT ); Thu, 13 Sep 2007 12:14:38 -0400 Received: from ns.suse.de ([195.135.220.2]:47270 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763303AbXIMQOb (ORCPT ); Thu, 13 Sep 2007 12:14:31 -0400 Message-Id: <20070913161429.709200229@strauss.suse.de> References: <20070913161428.343951643@strauss.suse.de> User-Agent: quilt/0.46-57 Date: Thu, 13 Sep 2007 18:14:32 +0200 From: Bernhard Walle To: kexec@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org Subject: [patch 4/7] Use extended crashkernel command line on ia64 Content-Disposition: inline; filename=crashkernel-ia64 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5218 Lines: 170 This patch adapts IA64 to use the generic parse_crashkernel() function instead of its own parsing for the crashkernel command line. Because the total amount of System RAM must be known when calling this function, efi_memmap_init() is modified to return its accumulated total_memory variable. Also, the crashkernel handling is moved in an own function in arch/ia64/kernel/setup.c to make the code more readable. Signed-off-by: Bernhard Walle --- arch/ia64/kernel/efi.c | 4 +- arch/ia64/kernel/setup.c | 88 +++++++++++++++++++++++---------------------- include/asm-ia64/meminit.h | 2 - 3 files changed, 50 insertions(+), 44 deletions(-) --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -967,7 +967,7 @@ find_memmap_space (void) * to use. We can allocate partial granules only if the unavailable * parts exist, and are WB. */ -void +unsigned long efi_memmap_init(unsigned long *s, unsigned long *e) { struct kern_memdesc *k, *prev = NULL; @@ -1084,6 +1084,8 @@ efi_memmap_init(unsigned long *s, unsign /* reserve the memory we are using for kern_memmap */ *s = (u64)kern_memmap; *e = (u64)++k; + + return total_memory; } void --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -208,6 +208,48 @@ static int __init register_memory(void) __initcall(register_memory); + +#ifdef CONFIG_KEXEC +static void setup_crashkernel(unsigned long total, int *n) +{ + unsigned long long base = 0, size = 0; + int ret; + + ret = parse_crashkernel(boot_command_line, total, + &size, &base); + if (ret == 0 && size > 0) { + if (!base) { + sort_regions(rsvd_region, *n); + base = kdump_find_rsvd_region(size, + rsvd_region, *n); + } + if (base != ~0UL) { + printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(size >> 20), + (unsigned long)(base >> 20), + (unsigned long)(total >> 20)); + rsvd_region[*n].start = + (unsigned long)__va(base); + rsvd_region[*n].end = + (unsigned long)__va(base + size); + (*n)++; + crashk_res.start = base; + crashk_res.end = base + size - 1; + } + } + efi_memmap_res.start = ia64_boot_param->efi_memmap; + efi_memmap_res.end = efi_memmap_res.start + + ia64_boot_param->efi_memmap_size; + boot_param_res.start = __pa(ia64_boot_param); + boot_param_res.end = boot_param_res.start + + sizeof(*ia64_boot_param); +} +#else +static inline void setup_crashkernel(unsigned long total, int *n) +{} +#endif + /** * reserve_memory - setup reserved memory areas * @@ -219,6 +261,7 @@ void __init reserve_memory (void) { int n = 0; + unsigned long total_memory = 0; /* * none of the entries in this table overlap @@ -254,50 +297,11 @@ reserve_memory (void) n++; #endif - efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); + total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); n++; -#ifdef CONFIG_KEXEC - /* crashkernel=size@offset specifies the size to reserve for a crash - * kernel. If offset is 0, then it is determined automatically. - * 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. - */ - { - char *from = strstr(boot_command_line, "crashkernel="); - unsigned long base, size; - if (from) { - size = memparse(from + 12, &from); - if (*from == '@') - base = memparse(from+1, &from); - else - base = 0; - if (size) { - if (!base) { - sort_regions(rsvd_region, n); - base = kdump_find_rsvd_region(size, - rsvd_region, n); - } - if (base != ~0UL) { - rsvd_region[n].start = - (unsigned long)__va(base); - rsvd_region[n].end = - (unsigned long)__va(base + size); - n++; - crashk_res.start = base; - crashk_res.end = base + size - 1; - } - } - } - efi_memmap_res.start = ia64_boot_param->efi_memmap; - efi_memmap_res.end = efi_memmap_res.start + - ia64_boot_param->efi_memmap_size; - boot_param_res.start = __pa(ia64_boot_param); - boot_param_res.end = boot_param_res.start + - sizeof(*ia64_boot_param); - } -#endif + setup_crashkernel(total_memory, &n); + /* end of memory marker */ rsvd_region[n].start = ~0UL; rsvd_region[n].end = ~0UL; --- a/include/asm-ia64/meminit.h +++ b/include/asm-ia64/meminit.h @@ -35,7 +35,7 @@ extern void find_memory (void); extern void reserve_memory (void); extern void find_initrd (void); extern int filter_rsvd_memory (unsigned long start, unsigned long end, void *arg); -extern void efi_memmap_init(unsigned long *, unsigned long *); +extern unsigned long efi_memmap_init(unsigned long *s, unsigned long *e); extern int find_max_min_low_pfn (unsigned long , unsigned long, void *); extern unsigned long vmcore_find_descriptor_size(unsigned long address); -- - 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/