ARM: 6487/1: add CONFIG_CRASH_DUMP to Kconfig

Add CONFIG_CRASH_DUMP configuration option which is used by dump
capture kernels.

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index db524e75c4a21e4f45bc4b72e459adcdaf1dda4b..03582fd14b879eecc520745743b435c38d734c35 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1650,6 +1650,19 @@ config ATAGS_PROC
          Should the atags used to boot the kernel be exported in an "atags"
          file in procfs. Useful with kexec.
 
+config CRASH_DUMP
+       bool "Build kdump crash kernel (EXPERIMENTAL)"
+       depends on EXPERIMENTAL
+       help
+         Generate crash dump after being started by kexec. This should
+         be normally only set in special crash dump kernels which are
+         loaded in the main kernel with kexec-tools into a specially
+         reserved region and then later executed after a crash by
+         kdump/kexec. The crash dump kernel must be compiled to a
+         memory address not used by the main kernel
+
+         For more details see Documentation/kdump/kdump.txt
+
 config AUTO_ZRELADDR
        bool "Auto calculation of the decompressed kernel image address"
        depends on !ZBOOT_ROM && !ARCH_U300