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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>
This commit is contained in:
Eric DeVolder 2023-07-12 12:15:36 -04:00 committed by Andrew Morton
parent bf9c23383f
commit 91506f7e5d
1 changed files with 15 additions and 47 deletions
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62
arch/arm64/Kconfig
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@ -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 ARCH_SUPPORTS_KEXEC
def_bool PM_SLEEP_SMP
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_FILE
def_bool y
config KEXEC_SIG
bool "Verify kernel signature during kexec_file_load() syscall"
config ARCH_SELECTS_KEXEC_FILE
def_bool y
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.
select HAVE_IMA_KEXEC if IMA
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_SUPPORTS_KEXEC_SIG
def_bool y
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_IMAGE_VERIFY_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_DEFAULT_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.
For more details see Documentation/admin-guide/kdump/kdump.rst
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config TRANS_TABLE
def_bool y