[PATCH 0/4] kexec/arm64: Add support for zlib compressed kernel images (Image.gz)

Bhupesh Sharma bhsharma at redhat.com
Wed Jul 10 12:54:25 PDT 2019


This patchset adds the support for zlib compressed kernel images
(Image.gz) for arm64 kexec-tools.

This was discussed a bit with the arm64 kernel maintainers (see [0]) and
after discussing the pros and cons of adding this support in
kernel-space v/s in user-space, we decided it makes more sense to add
this support to the user-space kexec-tools.

Note that this series adds support for unsigned arm64 Image.gz files
only as signing an Image.gz type file is not a easy implementation from
kexec-tools p-o-v. Also even standard signing tools like sbsign fail to
recongize the Image.gz format:

 $ sbsign --key certs/signing_key.pem  --cert certs/signing_key.pem Image.gz
   Invalid DOS header magic

... because that gzip file isn't a PE32+ that can be loaded by UEFI.
So I will work on the same in coming days and try to send a RFC
patchset for the same later on.

[0]. http://lists.infradead.org/pipermail/kexec/2019-June/023156.html

Bhupesh Sharma (4):
  kexec/kexec.c: Add the missing close() for fd used for
    kexec_file_load()
  kexec-uImage-arm64.c: Fix return value of uImage_arm64_probe()
  kexec/kexec-zlib.h: Add 'is_zlib_file()' helper function
  kexec/arm64: Add support for handling zlib compressed (Image.gz) image

 kexec/arch/arm64/Makefile             |   3 +-
 kexec/arch/arm64/kexec-arm64.c        |   1 +
 kexec/arch/arm64/kexec-arm64.h        |   7 ++
 kexec/arch/arm64/kexec-image-arm64.c  |   4 +-
 kexec/arch/arm64/kexec-uImage-arm64.c |  13 ++-
 kexec/arch/arm64/kexec-zImage-arm64.c | 199 ++++++++++++++++++++++++++++++++++
 kexec/kexec-zlib.h                    |   1 +
 kexec/kexec.c                         |  14 +++
 kexec/zlib.c                          |  32 ++++++
 9 files changed, 270 insertions(+), 4 deletions(-)
 create mode 100644 kexec/arch/arm64/kexec-zImage-arm64.c

-- 
2.7.4




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