Commit 1f0d6efe authored by Eric DeVolder's avatar Eric DeVolder Committed by Andrew Morton
Browse files

riscv/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/20230712161545.87870-12-eric.devolder@oracle.com


Signed-off-by: default avatarEric DeVolder <eric.devolder@oracle.com>
Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 80bf3c84

arch/riscv/Kconfig

+13 −31
Original line number Diff line number Diff line
@@ -650,48 +650,30 @@ config RISCV_BOOT_SPINWAIT 


	  If unsure what to do here, say N.



config KEXEC

	bool "Kexec system call"

	depends on MMU

config ARCH_SUPPORTS_KEXEC

	def_bool MMU



config ARCH_SELECTS_KEXEC

	def_bool y

	depends on KEXEC

	select HOTPLUG_CPU if 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.

config ARCH_SUPPORTS_KEXEC_FILE

	def_bool 64BIT && MMU



config KEXEC_FILE

	bool "kexec file based systmem call"

	depends on 64BIT && MMU

config ARCH_SELECTS_KEXEC_FILE

	def_bool y

	depends on KEXEC_FILE

	select HAVE_IMA_KEXEC if IMA

	select KEXEC_CORE

	select KEXEC_ELF

	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.



	  If you don't know what to do here, say Y.



config ARCH_HAS_KEXEC_PURGATORY

	def_bool KEXEC_FILE

	depends on CRYPTO=y

	depends on CRYPTO_SHA256=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.



	  For more details see Documentation/admin-guide/kdump/kdump.rst

config ARCH_SUPPORTS_CRASH_DUMP

	def_bool y



config COMPAT

	bool "Kernel support for 32-bit U-mode"