[PATCH v2] Livepatch fixes for v4.10 (v2).

[Konrad Rzeszutek Wilk <konrad@kernel.org>]

Since v1 (https://lists.xen.org/archives/html/xen-devel/2017-07/msg01127.html)
 - Redid the patches per review comments,
 - Included fixes for the errant sections causing the crash,
 - Rolled in patch from Ross in this patchset,

Hey,

I've been working towards making the livepatch-build-tools to work
on ARM32 and ARM64 - and as part of this I am sending some patches
that fix issues I saw on ARM 32.

The first two patches had been sent in the past (v1) and the one from Ross
as well.

Patches have been tested on ARM32 (CubieTruck), ARM64 (Hikey 960) and x86
with the livepatch tests:

http://xenbits.xen.org/gitweb/?p=xentesttools/bootstrap.git;a=blob_plain;f=root_image/debugspace/livepatch_test.pl;hb=HEAD

(which is a clone of what OSSTest has but without the OSSTest harness)

ARM32 was cross-compiled on Fedora 26 and Ubuntu Xenial - and the payloads
are now working (while with RELEASE-4.9.0 they would crash thanks to alignment
errors).

Thanks.

Konrad Rzeszutek Wilk (4):
      livepatch: Tighten alignment checks.
      livepatch: Include sizes when an mismatch occurs
      xen/livepatch/ARM32: Don't load and crash on livepatches loaded with wrong alignment.
      alternative/x86/arm32: Align altinstructions (and altinstr_replacement) sections.

Ross Lagerwall (1):
      livepatch: Declare live patching as a supported feature

 docs/features/livepatch.pandoc    | 103 ++++++++++++++++++++++++++++++++++++++
 docs/misc/livepatch.markdown      |   6 ++-
 xen/arch/arm/arm32/livepatch.c    |  15 ++++++
 xen/arch/arm/arm64/livepatch.c    |   6 +++
 xen/arch/x86/livepatch.c          |   6 +++
 xen/common/Kconfig                |   4 +-
 xen/common/livepatch.c            |  62 ++++++++++++++---------
 xen/common/livepatch_elf.c        |  13 +++++
 xen/include/asm-arm/alternative.h |   4 ++
 xen/include/asm-x86/alternative.h |   2 +
 xen/include/xen/elfstructs.h      |   2 +
 xen/include/xen/livepatch.h       |   1 +
 12 files changed, 196 insertions(+), 28 deletions(-)




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