Re: [PATCH v8 0/5] arm64/riscv: Add support for crashkernel CMA reservation

[Jinjie Ruan <ruanjinjie@huawei.com>]

On 2026/3/2 11:53, Jinjie Ruan wrote:
> The crash memory allocation, and the exclude of crashk_res, crashk_low_res
> and crashk_cma memory are almost identical across different architectures,
> This patch set handle them in crash core in a general way, which eliminate
> a lot of duplication code.
> 
> And add support for crashkernel CMA reservation for arm64 and riscv.

Hi all,

Do you have any new review comments on this patch set?

Thanks,

> 
> Rebased on v7.0-rc1.
> 
> Basic second kernel boot test were performed on QEMU platforms for x86,
> ARM64, and RISC-V architectures with the following parameters:
> 
> 	"cma=256M crashkernel=256M crashkernel=64M,cma"
> 
> Changes in v8:
> - Fix the build issues reported by kernel test robot and Sourabh.
> - Link to v7: https://lore.kernel.org/all/20260226130437.1867658-1-ruanjinjie@huawei.com/
> 
> Changes in v7:
> - Correct the inclusion of CMA-reserved ranges for kdump kernel in of/kexec
>   for arm64 and riscv.
> - Add Acked-by.
> - Link to v6: https://lore.kernel.org/all/20260224085342.387996-1-ruanjinjie@huawei.com/
> 
> Changes in v6:
> - Update the crash core exclude code as Mike suggested.
> - Rebased on v7.0-rc1.
> - Add acked-by.
> - Link to v5: https://lore.kernel.org/all/20260212101001.343158-1-ruanjinjie@huawei.com/
> 
> Changes in v5:
> - Fix the kernel test robot build warnings.
> - Sort crash memory ranges before preparing elfcorehdr for powerpc
> - Link to v4: https://lore.kernel.org/all/20260209095931.2813152-1-ruanjinjie@huawei.com/
> 
> Changes in v4:
> - Move the size calculation (and the realloc if needed) into the
>   generic crash.
> - Link to v3: https://lore.kernel.org/all/20260204093728.1447527-1-ruanjinjie@huawei.com/
> 
> Jinjie Ruan (4):
>   crash: Exclude crash kernel memory in crash core
>   crash: Use crash_exclude_core_ranges() on powerpc
>   arm64: kexec: Add support for crashkernel CMA reservation
>   riscv: kexec: Add support for crashkernel CMA reservation
> 
> Sourabh Jain (1):
>   powerpc/crash: sort crash memory ranges before preparing elfcorehdr
> 
>  .../admin-guide/kernel-parameters.txt         |  16 +--
>  arch/arm64/kernel/machine_kexec_file.c        |  39 +++----
>  arch/arm64/mm/init.c                          |   5 +-
>  arch/loongarch/kernel/machine_kexec_file.c    |  39 +++----
>  arch/powerpc/include/asm/kexec_ranges.h       |   1 -
>  arch/powerpc/kexec/crash.c                    |   5 +-
>  arch/powerpc/kexec/ranges.c                   | 101 +-----------------
>  arch/riscv/kernel/machine_kexec_file.c        |  38 +++----
>  arch/riscv/mm/init.c                          |   5 +-
>  arch/x86/kernel/crash.c                       |  89 +++------------
>  drivers/of/fdt.c                              |   9 +-
>  drivers/of/kexec.c                            |   9 ++
>  include/linux/crash_core.h                    |   9 ++
>  kernel/crash_core.c                           |  89 ++++++++++++++-
>  14 files changed, 178 insertions(+), 276 deletions(-)
>