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arm/kexec: refactor for kernel/Kconfig.kexec

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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/20230712161545.87870-4-eric.devolder@oracle.com
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Eric DeVolder 2023-07-12 12:15:34 -04:00 • committed by Andrew Morton
parent 6af5138083
commit 4183635e90
1 changed files with 4 additions and 25 deletions
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29
arch/arm/Kconfig
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@ -1645,20 +1645,8 @@ config XIP_DEFLATED_DATA
copied, saving some precious ROM space. A possible drawback is a copied, saving some precious ROM space. A possible drawback is a
slightly longer boot delay. slightly longer boot delay.
config KEXEC config ARCH_SUPPORTS_KEXEC
bool "Kexec system call (EXPERIMENTAL)" def_bool (!SMP || PM_SLEEP_SMP) && MMU
depends on (!SMP || PM_SLEEP_SMP)
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.
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.
config ATAGS_PROC config ATAGS_PROC
bool "Export atags in procfs" bool "Export atags in procfs"
@ -1668,17 +1656,8 @@ config ATAGS_PROC
Should the atags used to boot the kernel be exported in an "atags" Should the atags used to boot the kernel be exported in an "atags"
file in procfs. Useful with kexec. file in procfs. Useful with kexec.
config CRASH_DUMP config ARCH_SUPPORTS_CRASH_DUMP
bool "Build kdump crash kernel (EXPERIMENTAL)" def_bool y
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
For more details see Documentation/admin-guide/kdump/kdump.rst
config AUTO_ZRELADDR config AUTO_ZRELADDR
bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM