On 6/13/23 20:22, Leizhen (ThunderTown) wrote:
On 2023/6/13 1:27, Eric DeVolder wrote:
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@xxxxxxxxxx>
---
arch/arm64/Kconfig | 61 ++++++++--------------------------------------
1 file changed, 10 insertions(+), 51 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 343e1e1cae10..33552476a877 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1433,60 +1433,19 @@ config PARAVIRT_TIME_ACCOUNTING
If in doubt, say N here.
-config KEXEC
- depends on PM_SLEEP_SMP
- select KEXEC_CORE
- bool "kexec system call"
- 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.
-
-config KEXEC_FILE
- bool "kexec file based system call"
- select KEXEC_CORE
- select HAVE_IMA_KEXEC if IMA
- 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.
-
-config KEXEC_SIG
- bool "Verify kernel signature during kexec_file_load() syscall"
- depends on KEXEC_FILE
- help
- Select this option to verify a signature with loaded kernel
- image. If configured, any attempt of loading a image without
- valid signature will fail.
-
- 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 ARCH_HAS_KEXEC
+ def_bool PM_SLEEP_SMP
-config KEXEC_IMAGE_VERIFY_SIG
- bool "Enable Image signature verification support"
- default y
- depends on KEXEC_SIG
- depends on EFI && SIGNED_PE_FILE_VERIFICATION
- help
- Enable Image signature verification support.
I don't see an alternative to this option. It's used in
arch/arm64/kernel/kexec_image.c:135
Good catch! I will move this into the common options.
Thank you Zhen!
eric
-
-comment "Support for PE file signature verification disabled"
- depends on KEXEC_SIG
- depends on !EFI || !SIGNED_PE_FILE_VERIFICATION
+config ARCH_HAS_KEXEC_FILE
+ def_bool 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.
+config ARCH_SUPPORTS_KEXEC_FILE
+ def_bool y
+ depends on KEXEC_FILE
+ select HAVE_IMA_KEXEC if IMA
- For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_HAS_CRASH_DUMP
+ def_bool y
config TRANS_TABLE
def_bool y
