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s390/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/20230712161545.87870-13-eric.devolder@oracle.com
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Eric DeVolder 2023-07-12 12:15:43 -04:00 committed by Andrew Morton
parent 1f0d6efe52
commit 75239cf775
1 changed files with 23 additions and 46 deletions
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69
arch/s390/Kconfig
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@ -213,6 +213,7 @@ config S390
select HAVE_VIRT_CPU_ACCOUNTING_IDLE
select IOMMU_HELPER if PCI
select IOMMU_SUPPORT if PCI
select KEXEC
select MMU_GATHER_MERGE_VMAS
select MMU_GATHER_NO_GATHER
select MMU_GATHER_RCU_TABLE_FREE
@ -244,6 +245,28 @@ config PGTABLE_LEVELS
source "kernel/livepatch/Kconfig"
config ARCH_DEFAULT_KEXEC
def_bool y
config ARCH_SUPPORTS_KEXEC
def_bool y
config ARCH_SUPPORTS_KEXEC_FILE
def_bool CRYPTO && CRYPTO_SHA256 && CRYPTO_SHA256_S390
config ARCH_SUPPORTS_KEXEC_SIG
def_bool MODULE_SIG_FORMAT
config ARCH_HAS_KEXEC_PURGATORY
def_bool KEXEC_FILE
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
help
Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
This option also enables s390 zfcpdump.
See also <file:Documentation/s390/zfcpdump.rst>
menu "Processor type and features"
config HAVE_MARCH_Z10_FEATURES
@ -482,36 +505,6 @@ config SCHED_TOPOLOGY
source "kernel/Kconfig.hz"
config KEXEC
def_bool y
select KEXEC_CORE
config KEXEC_FILE
bool "kexec file based system call"
select KEXEC_CORE
depends on CRYPTO
depends on CRYPTO_SHA256
depends on CRYPTO_SHA256_S390
help
Enable the kexec file based system call. In contrast to the normal
kexec system call this system call takes file descriptors for the
kernel and initramfs as arguments.
config ARCH_HAS_KEXEC_PURGATORY
def_bool y
depends on KEXEC_FILE
config KEXEC_SIG
bool "Verify kernel signature during kexec_file_load() syscall"
depends on KEXEC_FILE && MODULE_SIG_FORMAT
help
This option makes kernel signature verification mandatory for
the kexec_file_load() syscall.
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 KERNEL_NOBP
def_bool n
prompt "Enable modified branch prediction for the kernel by default"
@ -733,22 +726,6 @@ config VFIO_AP
endmenu
menu "Dump support"
config CRASH_DUMP
bool "kernel crash dumps"
select KEXEC
help
Generate crash dump after being started by kexec.
Crash dump kernels are loaded in the main kernel with kexec-tools
into a specially reserved region and then later executed after
a crash by kdump/kexec.
Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
This option also enables s390 zfcpdump.
See also <file:Documentation/s390/zfcpdump.rst>
endmenu
config CCW
def_bool y