[PATCH] x86_64: Implemenent machine_emergency_restart

[linux-2.6] / arch / x86_64 / Kconfig

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index a853d87ff7e33000efef7f361f44a70021d4a4a6..4b8326177c52fba07bc4d9399d186da6609b946a 100644 (file)
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -369,6 +369,34 @@ config X86_MCE_INTEL
           Additional support for intel specific MCE features such as
           the thermal monitor.
 
+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
+       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 SECCOMP
        bool "Enable seccomp to safely compute untrusted bytecode"
        depends on PROC_FS
@@ -487,6 +515,8 @@ config UID16
 
 endmenu
 
+source "net/Kconfig"
+
 source drivers/Kconfig
 
 source "drivers/firmware/Kconfig"