Commit cea0bb1b authored by Mika Westerberg's avatar Mika Westerberg Committed by Russell King
Browse files

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: default avatarMika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 67742c81

arch/arm/kernel/setup.c

+25 −0
Original line number Diff line number Diff line
@@ -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;