diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 714cbaaab3aa..2183bb83ac83 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -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;