[0/3] arm64: kexec_file: add kdump

Message

AKASHI Takahiro Sept. 12, 2019, 6:01 a.m. UTC

This is the last piece of my kexec_file_load implementation for arm64.
It is now ready for being merged as some relevant patch to dtc/libfdt[1]
has finally been integrated in v5.3-rc1.
(Nothing changed since kexec_file v16[2] except adding Patch#1 and #2.)

Patch#1 and #2 are preliminary patches for libfdt component.
Patch#3 is to add kdump support.

[1] commit 9bb9c6a110ea ("scripts/dtc: Update to upstream version
    v1.5.0-23-g87963ee20693"), in particular
	7fcf8208b8a9 libfdt: add fdt_append_addrrange()
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-November/612641.html

AKASHI Takahiro (3):
  libfdt: define UINT32_MAX in libfdt_env.h
  libfdt: include fdt_addresses.c
  arm64: kexec_file: add crash dump support

 arch/arm64/include/asm/kexec.h         |   4 +
 arch/arm64/kernel/kexec_image.c        |   4 -
 arch/arm64/kernel/machine_kexec_file.c | 105 ++++++++++++++++++++++++-
 include/linux/libfdt_env.h             |   3 +
 lib/Makefile                           |   2 +-
 lib/fdt_addresses.c                    |   2 +
 6 files changed, 112 insertions(+), 8 deletions(-)
 create mode 100644 lib/fdt_addresses.c

Comments

AKASHI Takahiro Oct. 7, 2019, 3:04 a.m. UTC | #1

Reminder.
This patch set is still applicable to v5.4-rc although there is one minor
conflict in a comment; It is trivial and can easily be fixed.

While this patch works on v5.4, we cannot read a generated core dump
file with crash command, even, of the latest v7.2.7. This is due to
a newly added 52-bit address support (and related changes in mm).
The issue, as a nature of kdump, does exist with *legacy*
(non-kexec_file_load-based) kdump, too.
(We will need a kernel patch as well as patches on crash to fix the issue
and some guys have already been working.)

So I'd like to request you to keep reviewing my patch.

Thanks,
-Takahiro Akashi


On Thu, Sep 12, 2019 at 03:01:47PM +0900, AKASHI Takahiro wrote:
> This is the last piece of my kexec_file_load implementation for arm64.
> It is now ready for being merged as some relevant patch to dtc/libfdt[1]
> has finally been integrated in v5.3-rc1.
> (Nothing changed since kexec_file v16[2] except adding Patch#1 and #2.)
> 
> Patch#1 and #2 are preliminary patches for libfdt component.
> Patch#3 is to add kdump support.
> 
> [1] commit 9bb9c6a110ea ("scripts/dtc: Update to upstream version
>     v1.5.0-23-g87963ee20693"), in particular
> 	7fcf8208b8a9 libfdt: add fdt_append_addrrange()
> [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-November/612641.html
> 
> AKASHI Takahiro (3):
>   libfdt: define UINT32_MAX in libfdt_env.h
>   libfdt: include fdt_addresses.c
>   arm64: kexec_file: add crash dump support
> 
>  arch/arm64/include/asm/kexec.h         |   4 +
>  arch/arm64/kernel/kexec_image.c        |   4 -
>  arch/arm64/kernel/machine_kexec_file.c | 105 ++++++++++++++++++++++++-
>  include/linux/libfdt_env.h             |   3 +
>  lib/Makefile                           |   2 +-
>  lib/fdt_addresses.c                    |   2 +
>  6 files changed, 112 insertions(+), 8 deletions(-)
>  create mode 100644 lib/fdt_addresses.c
> 
> -- 
> 2.21.0
>