Commit 80bf3c84 authored by Eric DeVolder's avatar Eric DeVolder Committed by Andrew Morton
Browse files

powerpc/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/20230712161545.87870-11-eric.devolder@oracle.com


Signed-off-by: default avatarEric DeVolder <eric.devolder@oracle.com>
Reviewed-by: default avatarSourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent b9bf5cb1

arch/powerpc/Kconfig

+17 −38
Original line number Diff line number Diff line
@@ -589,41 +589,21 @@ config PPC64_SUPPORTS_MEMORY_FAILURE 
	default "y" if PPC_POWERNV

	select ARCH_SUPPORTS_MEMORY_FAILURE



config KEXEC

	bool "kexec system call"

	depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP)

	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.



	  The name comes from the similarity to the exec system call.



	  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 KEXEC_FILE

	bool "kexec file based system call"

	select KEXEC_CORE

	select HAVE_IMA_KEXEC if IMA

	select KEXEC_ELF

	depends on PPC64

	depends on CRYPTO=y

	depends on CRYPTO_SHA256=y

	help

	  This is a new version of the kexec system call. This call is

	  file based and takes in file descriptors as system call arguments

	  for kernel and initramfs as opposed to a list of segments as is the

	  case for the older kexec call.

config ARCH_SUPPORTS_KEXEC

	def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)



config ARCH_SUPPORTS_KEXEC_FILE

	def_bool PPC64 && CRYPTO=y && CRYPTO_SHA256=y



config ARCH_HAS_KEXEC_PURGATORY

	def_bool KEXEC_FILE



config ARCH_SELECTS_KEXEC_FILE

	def_bool y

	depends on KEXEC_FILE

	select KEXEC_ELF

	select HAVE_IMA_KEXEC if IMA



config PPC64_BIG_ENDIAN_ELF_ABI_V2

	# Option is available to BFD, but LLD does not support ELFv1 so this is

	# always true there.
@@ -683,14 +663,13 @@ config RELOCATABLE_TEST 
	  loaded at, which tends to be non-zero and therefore test the

	  relocation code.



config CRASH_DUMP

	bool "Build a dump capture kernel"

	depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)

config ARCH_SUPPORTS_CRASH_DUMP

	def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)



config ARCH_SELECTS_CRASH_DUMP

	def_bool y

	depends on CRASH_DUMP

	select RELOCATABLE if PPC64 || 44x || PPC_85xx

	help

	  Build a kernel suitable for use as a dump capture kernel.

	  The same kernel binary can be used as production kernel and dump

	  capture kernel.



config FA_DUMP

	bool "Firmware-assisted dump"