[PATCH] ppc64: kexec support for ppc64

[safe/jmp/linux-2.6] / arch / ppc64 / Kconfig

diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
index 5f40b43..f804f25 100644 (file)
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -142,6 +142,23 @@ config PPC_SPLPAR
          processors, that is, which share physical processors between
          two or more partitions.
 
+config KEXEC
+       bool "kexec system call (EXPERIMENTAL)"
+       depends on PPC_MULTIPLATFORM && EXPERIMENTAL
+       help
+         kexec is a system call that implements the ability to shutdown your
+         current kernel, and to start another kernel.  It is like a reboot
+         but it is indepedent of the system firmware.  And like a reboot
+         you can start any kernel with it, not just Linux.
+
+         The name comes from the similiarity to the exec system call.
+
+         It is an ongoing process to be certain the hardware in a machine
+         is properly shutdown, so do not be surprised if this code does not
+         initially work for you.  It may help to enable device hotplugging
+         support.  As of this writing the exact hardware interface is
+         strongly in flux, so no good recommendation can be made.
+
 config IBMVIO
        depends on PPC_PSERIES || PPC_ISERIES
        bool