arm64/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/20230712161545.87870-6-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/arm64/Kconfig b/arch/arm64/Kconfig
index a2511b3..7635ac6 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1461,60 +1461,28 @@ config PARAVIRT_TIME_ACCOUNTING
 
          If in doubt, say N here.
 
-config KEXEC
-       depends on PM_SLEEP_SMP
-       select KEXEC_CORE
-       bool "kexec system call"
-       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 KEXEC_FILE
-       bool "kexec file based system call"
-       select KEXEC_CORE
-       select HAVE_IMA_KEXEC if IMA
-       help
-         This is new version of kexec system call. This system call is
-         file based and takes file descriptors as system call argument
-         for kernel and initramfs as opposed to list of segments as
-         accepted by previous system call.
+config ARCH_SUPPORTS_KEXEC
+       def_bool PM_SLEEP_SMP
 
-config KEXEC_SIG
-       bool "Verify kernel signature during kexec_file_load() syscall"
-       depends on KEXEC_FILE
-       help
-         Select this option to verify a signature with loaded kernel
-         image. If configured, any attempt of loading a image without
-         valid signature will fail.
+config ARCH_SUPPORTS_KEXEC_FILE
+       def_bool y
 
-         In addition to that option, you need to enable signature
-         verification for the corresponding kernel image type being
-         loaded in order for this to work.
+config ARCH_SELECTS_KEXEC_FILE
+       def_bool y
+       depends on KEXEC_FILE
+       select HAVE_IMA_KEXEC if IMA
 
-config KEXEC_IMAGE_VERIFY_SIG
-       bool "Enable Image signature verification support"
-       default y
-       depends on KEXEC_SIG
-       depends on EFI && SIGNED_PE_FILE_VERIFICATION
-       help
-         Enable Image signature verification support.
+config ARCH_SUPPORTS_KEXEC_SIG
+       def_bool y
 
-comment "Support for PE file signature verification disabled"
-       depends on KEXEC_SIG
-       depends on !EFI || !SIGNED_PE_FILE_VERIFICATION
+config ARCH_SUPPORTS_KEXEC_IMAGE_VERIFY_SIG
+       def_bool y
 
-config CRASH_DUMP
-       bool "Build kdump crash kernel"
-       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.
+config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
+       def_bool y
 
-         For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_SUPPORTS_CRASH_DUMP
+       def_bool y
 
 config TRANS_TABLE
        def_bool y