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    Subject[PATCH v3 11/13] riscv/kexec: refactor for kernel/Kconfig.kexec
    Date
    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.

    Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
    ---
    arch/riscv/Kconfig | 48 ++++++++++++++--------------------------------
    1 file changed, 14 insertions(+), 34 deletions(-)

    diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
    index 5966ad97c30c..c484abd9bbfd 100644
    --- a/arch/riscv/Kconfig
    +++ b/arch/riscv/Kconfig
    @@ -585,48 +585,28 @@ 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 && CRYPTO=y && CRYPTO_SHA256=y

    -config KEXEC_FILE
    - bool "kexec file based systmem call"
    - depends on 64BIT && MMU
    - select HAVE_IMA_KEXEC if IMA
    - select KEXEC_CORE
    +config ARCH_SELECTS_KEXEC_FILE
    + def_bool y
    + depends on KEXEC_FILE
    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.
    + select HAVE_IMA_KEXEC if IMA

    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"
    --
    2.31.1
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