Add support for crashkernel CMA reservation for arm64 and riscv.

By the way, exclude crash kernel memory in crash core to
avoid duplication.

Changs in v3:
- Exclude crash kernel memory in crash core as Mike suggested.
- Add acked-by.

Jinjie Ruan (3):
  crash: Exclude crash kernel memory in crash core
  arm64: kexec: Add support for crashkernel CMA reservation
  riscv: kexec: Add support for crashkernel CMA reservation

 .../admin-guide/kernel-parameters.txt         | 16 ++++----
 arch/arm64/kernel/machine_kexec_file.c        | 16 +++-----
 arch/arm64/mm/init.c                          |  5 ++-
 arch/loongarch/kernel/machine_kexec_file.c    | 12 ------
 arch/powerpc/kexec/ranges.c                   | 16 ++------
 arch/riscv/kernel/machine_kexec_file.c        | 15 ++++---
 arch/riscv/mm/init.c                          |  5 ++-
 arch/x86/kernel/crash.c                       | 39 +------------------
 kernel/crash_core.c                           | 28 +++++++++++++
 9 files changed, 61 insertions(+), 91 deletions(-)

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2.34.1