On 2023/6/13 1:27, Eric DeVolder wrote:
> The kexec and crash kernel options are provided in the common
> kernel/Kconfig.kexec. Utilize the common options and provide
> the ARCH_HAS_ and ARCH_SUPPORTS_ entries to recreate the
> equivalent set of KEXEC and CRASH options.
>
> Signed-off-by: Eric DeVolder <eric.devol...@oracle.com>
> ---
> arch/arm64/Kconfig | 61 ++++++++--------------------------------------
> 1 file changed, 10 insertions(+), 51 deletions(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 343e1e1cae10..33552476a877 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1433,60 +1433,19 @@ 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 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.
> -
> - 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_HAS_KEXEC
> + def_bool PM_SLEEP_SMP
>
> -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.
I don't see an alternative to this option. It's used in
arch/arm64/kernel/kexec_image.c:135
> -
> -comment "Support for PE file signature verification disabled"
> - depends on KEXEC_SIG
> - depends on !EFI || !SIGNED_PE_FILE_VERIFICATION
> +config ARCH_HAS_KEXEC_FILE
> + 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_SUPPORTS_KEXEC_FILE
> + def_bool y
> + depends on KEXEC_FILE
> + select HAVE_IMA_KEXEC if IMA
>
> - For more details see Documentation/admin-guide/kdump/kdump.rst
> +config ARCH_HAS_CRASH_DUMP
> + def_bool y
>
> config TRANS_TABLE
> def_bool y
>
--
Regards,
Zhen Lei
