loongarch/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/20230712161545.87870-7-eric.devolder@oracle.com
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index e71d5bf..9f81b78 100644 (file)
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -538,28 +538,16 @@ config CPU_HAS_PREFETCH
        bool
        default y
 
-config KEXEC
-       bool "Kexec system call"
-       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 y
 
-         The name comes from the similarity to the exec system call.
+config ARCH_SUPPORTS_CRASH_DUMP
+       def_bool y
 
-config CRASH_DUMP
-       bool "Build kdump crash kernel"
+config ARCH_SELECTS_CRASH_DUMP
+       def_bool y
+       depends on CRASH_DUMP
        select RELOCATABLE
-       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.
-
-         For more details see Documentation/admin-guide/kdump/kdump.rst
 
 config RELOCATABLE
        bool "Relocatable kernel"