This is a preparatory patch set for adding kexec_file support on arm64.
It was originally included in a arm64 patch set[1], but Philipp is also
working on their kexec_file support on s390[2] and some changes are now
conflicting.
So these common parts were extracted and put into a separate patch set for
better integration. What's more, my original patch#4 was split into a few
small chunks for easier review after Dave's comment.
As such, the resulting code is basically identical with my original, and
the only *visible* differences are:
* renamings of _kexec_kernel_image_probe() and
_kimage_file_post_load_cleanup()
* change one of types of arguments at prepare_elf64_headers()
Those, unfortunately, require a couple of trivial changes on the rest
(#1, #6 to #13) of my arm64 kexec_file patch set[1].
Patch#1 allows making a use of purgatory optional, particularly useful
for arm64.
Patch#2 commonalizes arch_kexec_kernel_{image_probe, image_load,
verify_sig}() and arch_kimage_file_post_load_cleanup() across architectures.
Patch#3-#7 is also intended to generalize parse_elf64_headers(), along with
exclude_mem_range(), to be made best re-use of.
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-February/561182.html
[2] http://lkml.iu.edu//hypermail/linux/kernel/1802.1/02596.html
Changes in v2 (Mar 6, 2018)
* use IS_ENABLED() instead of #ifdef's in kexec_calculate_store_digests()
* rename _kexec_kernel_*() and make them static for now except for
kexec_image_probe_default() which is actually used by arch(powerpc) code
(Note: kexec_image_post_load_cleanup_default() will also be exported by
arm64 patches.)
* change a type of kernel_map in prepare_elf64_headers() to "int"
* check for a total number of system ram regions in full_up_crash_elf_data()
and use vzalloc() instead of vmalloc()
AKASHI Takahiro (7):
kexec_file: make an use of purgatory optional
kexec_file,x86,powerpc: factor out kexec_file_ops functions
x86: kexec_file: purge system-ram walking from prepare_elf64_headers()
x86: kexec_file: remove X86_64 dependency from prepare_elf64_headers()
x86: kexec_file: lift CRASH_MAX_RANGES limit on crash_mem buffer
x86: kexec_file: clean up prepare_elf64_headers()
kexec_file, x86: move re-factored code to generic side
arch/powerpc/Kconfig | 3 +
arch/powerpc/include/asm/kexec.h | 2 +-
arch/powerpc/kernel/kexec_elf_64.c | 2 +-
arch/powerpc/kernel/machine_kexec_file_64.c | 39 +---
arch/x86/Kconfig | 3 +
arch/x86/include/asm/kexec-bzimage64.h | 2 +-
arch/x86/kernel/crash.c | 334 ++++++----------------------
arch/x86/kernel/kexec-bzimage64.c | 2 +-
arch/x86/kernel/machine_kexec_64.c | 45 +---
include/linux/kexec.h | 32 ++-
kernel/kexec_file.c | 240 +++++++++++++++++++-
11 files changed, 338 insertions(+), 366 deletions(-)
--
2.16.2
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