diff options
author | Mika Westerberg <mika.westerberg@iki.fi> | 2010-05-10 09:29:32 +0100 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-09 15:00:53 +0100 |
commit | cea0bb1bc59b94625e60b69aaa9ad6749d5b57dd (patch) | |
tree | 05113e4666fff28e1c1702fb7e78fd71783d75ee /arch/arm/kernel/setup.c | |
parent | 67742c8168ed66fdd6cb5dc90e06c43cdc5bba07 (diff) | |
download | op-kernel-dev-cea0bb1bc59b94625e60b69aaa9ad6749d5b57dd.zip op-kernel-dev-cea0bb1bc59b94625e60b69aaa9ad6749d5b57dd.tar.gz |
ARM: 6122/1: kdump: add support for elfcorehdr parameter
This parameter is used by primary kernel to pass address of vmcore
header to the dump capture kernel.
Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/setup.c')
-rw-r--r-- | arch/arm/kernel/setup.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 714cbaa..2183bb8 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -20,6 +20,7 @@ #include <linux/screen_info.h> #include <linux/init.h> #include <linux/kexec.h> +#include <linux/crash_dump.h> #include <linux/root_dev.h> #include <linux/cpu.h> #include <linux/interrupt.h> @@ -730,6 +731,30 @@ static void __init reserve_crashkernel(void) static inline void reserve_crashkernel(void) {} #endif /* CONFIG_KEXEC */ +/* + * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by + * is_kdump_kernel() to determine if we are booting after a panic. Hence + * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. + */ + +#ifdef CONFIG_CRASH_DUMP +/* + * elfcorehdr= specifies the location of elf core header stored by the crashed + * kernel. This option will be passed by kexec loader to the capture kernel. + */ +static int __init setup_elfcorehdr(char *arg) +{ + char *end; + + if (!arg) + return -EINVAL; + + elfcorehdr_addr = memparse(arg, &end); + return end > arg ? 0 : -EINVAL; +} +early_param("elfcorehdr", setup_elfcorehdr); +#endif /* CONFIG_CRASH_DUMP */ + void __init setup_arch(char **cmdline_p) { struct tag *tags = (struct tag *)&init_tags; |