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riscv/kexec: refactor for kernel/Kconfig.kexec

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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: Eric DeVolder <eric.devolder@oracle.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Eric DeVolder 2023-07-12 12:15:42 -04:00 committed by Andrew Morton
parent 80bf3c84e9
commit 1f0d6efe52
1 changed files with 13 additions and 31 deletions
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44
arch/riscv/Kconfig
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@ -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"