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SubjectRe: [PATCH 00/17] Add kexec_file_load support to s390
Hi Philipp,

I added AKASHI in cc, he posted arm64 kexec_file series previously.
I would like to read both series especially the general part, but
maybe at the end of this month because of a holiday..

From the patch log the cleanup looks nice, but still need read the
details.

On 02/12/18 at 11:07am, Philipp Rudo wrote:
> Hi everybody
>
> resending the series as there was no reaction, yet. Furthermore i was told
> that Andrew and the x86 list should also be CCed, so welcome.
>
> No changes made to the patches since first time i sent them. The patches
> apply to the current master (v4.16-rc1).
>
> Thanks
> Philipp
>
> ---
>
> this series adds the kexec_file_load system call to s390. Before the system
> call is added there are some preparations/clean ups to common
> kexec_file_load. In detail this series contains:
>
> Patch #1&2: Minor cleanups/fixes.
>
> Patch #3-9: Clean up the purgatory load/relocation code. Especially remove
> the mis-use of the purgatory_info->sechdrs->sh_offset field, currently
> holding a pointer into either kexec_purgatory (ro) or purgatory_buf (rw)
> depending on the section. With these patches the section address will be
> calculated verbosely and sh_offset will contain the offset of the section
> in the stripped purgatory binary (purgatory_buf).
>
> Patch #10: Allows architectures to set the purgaory load address. This
> patch is important for s390 as the kernel and purgatory have to be loaded
> to fixed addresses. In current code this is impossible as the purgatory
> load is opaque to the architecture.
>
> Patch #11: Moves x86 purgatories sha implementation to common lib/
> directory.
>
> Patches #12-17 finally adds the kexec_file_load system call to s390.
>
> Please note that I had to touch arch code for x86 and power a little. In
> theory this should not change the behavior but I don't have a way to test
> it. Cross-compiling with defconfig(*) works fine for both.
>
> Thanks
> Philipp
>
> (*) On x86 with the orc unwinder turned off. objtool SEGFAULTs on s390...
>
> Philipp Rudo (17):
> kexec_file: Silence compile warnings
> kexec_file: Remove checks in kexec_purgatory_load
> kexec_file: Make purgatory_info->ehdr const
> kexec_file: Search symbols in read-only kexec_purgatory
> kexec_file: Use read-only sections in arch_kexec_apply_relocations*
> kexec_file: Split up __kexec_load_puragory
> kexec_file: Simplify kexec_purgatory_setup_sechdrs 1
> kexec_file: Simplify kexec_purgatory_setup_sechdrs 2
> kexec_file: Remove mis-use of sh_offset field
> kexec_file: Allow archs to set purgatory load address
> kexec_file: Move purgatories sha256 to common code
> s390/kexec_file: Prepare setup.h for kexec_file_load
> s390/kexec_file: Add purgatory
> s390/kexec_file: Add kexec_file_load system call
> s390/kexec_file: Add image loader
> s390/kexec_file: Add crash support to image loader
> s390/kexec_file: Add ELF loader
>
> arch/powerpc/kernel/kexec_elf_64.c | 9 +-
> arch/s390/Kbuild | 1 +
> arch/s390/Kconfig | 4 +
> arch/s390/include/asm/kexec.h | 23 ++
> arch/s390/include/asm/purgatory.h | 17 ++
> arch/s390/include/asm/setup.h | 40 ++-
> arch/s390/kernel/Makefile | 1 +
> arch/s390/kernel/asm-offsets.c | 5 +
> arch/s390/kernel/compat_wrapper.c | 1 +
> arch/s390/kernel/kexec_elf.c | 149 ++++++++++
> arch/s390/kernel/kexec_image.c | 78 +++++
> arch/s390/kernel/machine_kexec_file.c | 291 +++++++++++++++++++
> arch/s390/kernel/syscalls/syscall.tbl | 1 +
> arch/s390/purgatory/Makefile | 37 +++
> arch/s390/purgatory/head.S | 279 ++++++++++++++++++
> arch/s390/purgatory/purgatory.c | 42 +++
> arch/x86/kernel/kexec-bzimage64.c | 8 +-
> arch/x86/kernel/machine_kexec_64.c | 66 ++---
> arch/x86/purgatory/Makefile | 3 +
> arch/x86/purgatory/purgatory.c | 2 +-
> include/linux/kexec.h | 38 +--
> {arch/x86/purgatory => include/linux}/sha256.h | 10 +-
> kernel/kexec_file.c | 375 ++++++++++++-------------
> {arch/x86/purgatory => lib}/sha256.c | 4 +-
> 24 files changed, 1200 insertions(+), 284 deletions(-)
> create mode 100644 arch/s390/include/asm/purgatory.h
> create mode 100644 arch/s390/kernel/kexec_elf.c
> create mode 100644 arch/s390/kernel/kexec_image.c
> create mode 100644 arch/s390/kernel/machine_kexec_file.c
> create mode 100644 arch/s390/purgatory/Makefile
> create mode 100644 arch/s390/purgatory/head.S
> create mode 100644 arch/s390/purgatory/purgatory.c
> rename {arch/x86/purgatory => include/linux}/sha256.h (63%)
> rename {arch/x86/purgatory => lib}/sha256.c (99%)
>
> --
> 2.13.5
>
>
> _______________________________________________
> kexec mailing list
> kexec@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec

Thanks
Dave

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