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sh/kexec: refactor for kernel/Kconfig.kexec 

The kexec and crash kernel options are provided in the common
kernel/Kconfig.kexec. Utilize the common options and provide
the ARCH_SUPPORTS_ and ARCH_SELECTS_ entries to recreate the
equivalent set of KEXEC and CRASH options.

Link: https://lkml.kernel.org/r/20230712161545.87870-14-eric.devolder@oracle.com
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Eric DeVolder 2023-07-12 12:15:44 -04:00 committed by Andrew Morton
parent 75239cf775
commit 40445d0601
1 changed files with 6 additions and 36 deletions
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42
arch/sh/Kconfig
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@ -548,44 +548,14 @@ menu "Kernel features"
source "kernel/Kconfig.hz"
config KEXEC
bool "kexec system call (EXPERIMENTAL)"
depends on MMU
select KEXEC_CORE
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 independent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
config ARCH_SUPPORTS_KEXEC
def_bool MMU
The name comes from the similarity to the exec system call.
config ARCH_SUPPORTS_CRASH_DUMP
def_bool BROKEN_ON_SMP
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. As of this writing the exact hardware
interface is strongly in flux, so no good recommendation can be
made.
config CRASH_DUMP
bool "kernel crash dumps (EXPERIMENTAL)"
depends on BROKEN_ON_SMP
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 using
PHYSICAL_START.
For more details see Documentation/admin-guide/kdump/kdump.rst
config KEXEC_JUMP
bool "kexec jump (EXPERIMENTAL)"
depends on KEXEC && HIBERNATION
help
Jump between original kernel and kexeced kernel and invoke
code via KEXEC
config ARCH_SUPPORTS_KEXEC_JUMP
def_bool y
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)