Commit 91506f7e authored by Eric DeVolder's avatar Eric DeVolder Committed by Andrew Morton
Browse files

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: default avatarEric DeVolder <eric.devolder@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent bf9c2338

arch/arm64/Kconfig

+16 −48
Original line number Diff line number Diff line
@@ -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