[PATCH v4 10/13] powerpc/kexec: refactor for kernel/Kconfig.kexec

Eric DeVolder
2023-07-05T14:21:30Z

Reviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com>
---
arch/powerpc/Kconfig | 55 ++++++++++++++------------------------------
1 file changed, 17 insertions(+), 38 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 0b1172cbeccb..1695a71777f0 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -589,41 +589,21 @@ config PPC64_SUPPORTS_MEMORY_FAILURE
default "y" if PPC_POWERNV
select ARCH_SUPPORTS_MEMORY_FAILURE

-config KEXEC
- bool "kexec system call"
- depends on PPC_BOOK3S || PPC_E500 || (44x && !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.
-
- It is an ongoing process to be certain the hardware in a machine
- is properly shutdown, so do not be surprised if this code does not
- initially work for you. As of this writing the exact hardware
- interface is strongly in flux, so no good recommendation can be
- made.
-
-config KEXEC_FILE
- bool "kexec file based system call"
- select KEXEC_CORE
- select HAVE_IMA_KEXEC if IMA
- select KEXEC_ELF
- depends on PPC64
- depends on CRYPTO=y
- depends on CRYPTO_SHA256=y
- help
- This is a new version of the kexec system call. This call is
- file based and takes in file descriptors as system call arguments
- for kernel and initramfs as opposed to a list of segments as is the
- case for the older kexec call.
+config ARCH_SUPPORTS_KEXEC
+ def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
+
+config ARCH_SUPPORTS_KEXEC_FILE
+ def_bool PPC64 && CRYPTO=y && CRYPTO_SHA256=y

config ARCH_HAS_KEXEC_PURGATORY
def_bool KEXEC_FILE

+config ARCH_SELECTS_KEXEC_FILE
+ def_bool y
+ depends on KEXEC_FILE
+ select KEXEC_ELF
+ select HAVE_IMA_KEXEC if IMA
+
config PPC64_BIG_ENDIAN_ELF_ABI_V2
# Option is available to BFD, but LLD does not support ELFv1 so this is
# always true there.
@@ -683,14 +663,13 @@ config RELOCATABLE_TEST
loaded at, which tends to be non-zero and therefore test the
relocation code.

-config CRASH_DUMP
- bool "Build a dump capture kernel"
- depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
+config ARCH_SUPPORTS_CRASH_DUMP
+ def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
+
+config ARCH_SELECTS_CRASH_DUMP
+ def_bool y
+ depends on CRASH_DUMP
select RELOCATABLE if PPC64 || 44x || PPC_85xx
- help
- Build a kernel suitable for use as a dump capture kernel.
- The same kernel binary can be used as production kernel and dump
- capture kernel.

config FA_DUMP
bool "Firmware-assisted dump"
--
2.31.1