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-rw-r--r--arch/i386/Kconfig33
1 files changed, 21 insertions, 12 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index d849c6870e3..554ce3f344c 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -645,17 +645,6 @@ config SECCOMP
source kernel/Kconfig.hz
-config PHYSICAL_START
- hex "Physical address where the kernel is loaded" if EMBEDDED
- default "0x100000"
- help
- This gives the physical address where the kernel is loaded.
- Primarily used in the case of kexec on panic where the
- fail safe kernel needs to run at a different address than
- the panic-ed kernel.
-
- Don't change this unless you know what you are doing.
-
config KEXEC
bool "kexec system call (EXPERIMENTAL)"
depends on EXPERIMENTAL
@@ -675,11 +664,31 @@ config KEXEC
config CRASH_DUMP
bool "kernel crash dumps (EXPERIMENTAL)"
- depends on EMBEDDED
depends on EXPERIMENTAL
depends on HIGHMEM
help
Generate crash dump after being started by kexec.
+
+config PHYSICAL_START
+ hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
+
+ default "0x1000000" if CRASH_DUMP
+ default "0x100000"
+ help
+ This gives the physical address where the kernel is loaded. Normally
+ for regular kernels this value is 0x100000 (1MB). But in the case
+ of kexec on panic the fail safe kernel needs to run at a different
+ address than the panic-ed kernel. This option is used to set the load
+ address for kernels used to capture crash dump on being kexec'ed
+ after panic. The default value for crash dump kernels is
+ 0x1000000 (16MB). This can also be set based on the "X" value as
+ specified in the "crashkernel=YM@XM" command line boot parameter
+ passed to the panic-ed kernel. Typically this parameter is set as
+ crashkernel=64M@16M. Please take a look at
+ Documentation/kdump/kdump.txt for more details about crash dumps.
+
+ Don't change this unless you know what you are doing.
+
endmenu