ACK: [PULL][SRU Zesty] kdump support for arm64

[Colin Ian King]

On 21/06/17 01:40, dann frazier wrote:
> hey,
> Here's a zesty backport of the arm64 kdump support added in v4.12. Tested on
> a Cavium ThunderX CRB1S and a Qualcomm QDF2400. The QDF2400 support
> has an outstanding issue where the crash*ing* kernel needs to be
> booted w/ maxcpus=1 in order for the crash kernel to successfully
> boot. This is also the case w/ upstream v4.12, and is still under
> investigation.
> 
> SRUs for the userspace components are being staged at ppa:dannf/arm64-kdump.
> 
> See the bug for regression risk/testing details:
>   https://bugs.launchpad.net/bugs/1694859
> 
> The following changes since commit ab1f739cb13986bcfc4875c15dc0161935d7f004:
> 
>   UBUNTU: Ubuntu-4.10.0-25.29 (2017-06-20 16:40:58 +0200)
> 
> are available in the git repository at:
> 
>   git://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/linux
> arm64-kdump-zesty
> 
> for you to fetch changes up to c2b49cc6b38b5c4669ab8156d03bc93de13b0c45:
> 
>   efi/libstub/arm*: Set default address and size cells values for an
> empty dtb (2017-06-20 17:32:01 -0600)
> 
> ----------------------------------------------------------------
> AKASHI Takahiro (11):
>       memblock: add memblock_clear_nomap()
>       memblock: add memblock_cap_memory_range()
>       arm64: limit memory regions based on DT property, usable-memory-range
>       arm64: kdump: reserve memory for crash dump kernel
>       arm64: mm: add set_memory_valid()
>       arm64: kdump: protect crash dump kernel memory
>       arm64: hibernate: preserve kdump image around hibernation
>       arm64: kdump: implement machine_crash_shutdown()
>       arm64: kdump: add VMCOREINFO's for user-space tools
>       arm64: kdump: provide /proc/vmcore file
>       Documentation: kdump: describe arm64 port
> 
> James Morse (1):
>       Documentation: dt: chosen properties for arm64 kdump
> 
> Miles Chen (1):
>       arm64: mm: use phys_addr_t instead of unsigned long in __map_memblock
> 
> Sameer Goel (1):
>       efi/libstub/arm*: Set default address and size cells values for
> an empty dtb
> 
> dann frazier (1):
>       UBUNTU: [Config] CONFIG_CRASH_DUMP=y on arm64
> 
>  Documentation/devicetree/bindings/chosen.txt |  45 +++++++
>  Documentation/kdump/kdump.txt                |  16 ++-
>  arch/arm64/Kconfig                           |  11 ++
>  arch/arm64/include/asm/cacheflush.h          |   1 +
>  arch/arm64/include/asm/hardirq.h             |   2 +-
>  arch/arm64/include/asm/kexec.h               |  52 +++++++-
>  arch/arm64/include/asm/smp.h                 |   3 +
>  arch/arm64/kernel/Makefile                   |   1 +
>  arch/arm64/kernel/crash_dump.c               |  71 +++++++++++
>  arch/arm64/kernel/hibernate.c                |  10 +-
>  arch/arm64/kernel/machine_kexec.c            | 170 +++++++++++++++++++++++--
>  arch/arm64/kernel/setup.c                    |   7 +-
>  arch/arm64/kernel/smp.c                      |  68 ++++++++++
>  arch/arm64/mm/init.c                         | 181 +++++++++++++++++++++++++++
>  arch/arm64/mm/mmu.c                          |  92 +++++++-------
>  arch/arm64/mm/pageattr.c                     |  15 ++-
>  debian.master/config/annotations             |   2 +-
>  drivers/firmware/efi/libstub/fdt.c           |  28 ++++-
>  include/linux/memblock.h                     |   2 +
>  mm/memblock.c                                |  56 ++++++---
>  20 files changed, 750 insertions(+), 83 deletions(-)
>  create mode 100644 arch/arm64/kernel/crash_dump.c
> 
Thanks Dann,

I'm satisfied by the regression risk description in the bug, most of
this is arch specific and the parts that are not are of a low regression
risk. So..

Acked-by: Colin Ian King <colin.king at canonical.com>