linux-kernel - [PATCH v1 12/21] s390/kexec: refactor for kernel/Kconfig.kexec

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Message-Id: <20230612172805.681179-13-eric.devolder@oracle.com>
Date:   Mon, 12 Jun 2023 13:28:04 -0400
From:   Eric DeVolder <eric.devolder@...cle.com>
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Subject: [PATCH v1 12/21] s390/kexec: refactor for kernel/Kconfig.kexec

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.devolder@...cle.com>
---
 arch/s390/Kconfig | 65 ++++++++++++++---------------------------------
 1 file changed, 19 insertions(+), 46 deletions(-)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 6dab9c1be508..2eda5a0e240f 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -243,6 +243,25 @@ config PGTABLE_LEVELS
 
 source "kernel/livepatch/Kconfig"
 
+config ARCH_DEFAULT_KEXEC
+	def_bool y
+
+config ARCH_HAS_KEXEC
+	def_bool y
+
+config ARCH_HAS_KEXEC_FILE
+	def_bool CRYPTO && CRYPTO_SHA256 && CRYPTO_SHA256_S390
+
+config ARCH_HAS_KEXEC_PURGATORY
+	def_bool KEXEC_FILE
+
+config ARCH_HAS_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
@@ -481,36 +500,6 @@ 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"
@@ -732,22 +721,6 @@ 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
 
-- 
2.31.1