[PATCH v7 0/5] arm64/riscv: Add support for crashkernel CMA reservation

[Jinjie Ruan]

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.

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 v7:
- Correct the inclusion of CMA-reserved ranges for kdump kernel in of/kexec
  for arm64 and riscv.
- Add Acked-by.

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       |   4 +-
 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                            |  13 ++-
 include/linux/crash_core.h                    |   9 ++
 kernel/crash_core.c                           |  89 ++++++++++++++-
 14 files changed, 183 insertions(+), 278 deletions(-)

-- 
2.34.1