[PATCH] powerpc: Add CONFIG_CRASH_DUMP

This patch adds a Kconfig variable, CONFIG_CRASH_DUMP, which configures the
built kernel for use as a Kdump kernel.

Currently "all" this involves is changing the value of KERNELBASE to 32 MB.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2c1186ada3ab..773b880d5577 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -379,6 +379,17 @@ config CELL_IIC
         bool
         default y
 
+config CRASH_DUMP
+        bool "kernel crash dumps (EXPERIMENTAL)"
+        depends on PPC_MULTIPLATFORM
+        depends on EXPERIMENTAL
+        help
+          Build a kernel suitable for use as a kdump capture kernel.
+          The kernel will be linked at a different address than normal, and
+          so can only be used for Kdump.
+
+          Don't change this unless you know what you are doing.
+
 config IBMVIO
         depends on PPC_PSERIES || PPC_ISERIES
         bool