Merge patch series "arm64/riscv: Add support for crashkernel CMA reservation"

Jinjie Ruan <ruanjinjie@huawei.com> says:

The crash memory allocation, and the exclusion of crashk_res,
crashk_low_res and crashk_cma memory are almost identical across
different architectures.

Handle them in crash core in a generic way, to eliminate a lot of
code duplication.

And add support for crashkernel CMA reservation for arm64 and riscv.

Basic second kernel boot test were performed on QEMU platforms for x86,
ARM64 and RISC-V architectures with the following parameters:

        "cma=256M crashkernel=4G crashkernel=64M,cma"

For first kernel, there will be such log:

        # dmesg | grep crash
        [    0.000000] crashkernel low memory reserved: 0xe8000000 - 0xf0000000 (128 MB)
        [    0.000000] crashkernel reserved: 0x000000023e600000 - 0x000000033e600000 (4096 MB)
        [    0.000000] crashkernel CMA reserved: 64 MB in 1 ranges

        # dmesg | grep cma
        [    0.000000] cma: Reserved 256 MiB at 0x00000000f0000000
        [    0.000000] cma: Reserved 64 MiB at 0x0000000100000000

For second kernel, there will be such log:

        [    0.000000] OF: fdt: Looking for usable-memory-range property...
        [    0.000000] OF: fdt: cap_mem_regions[0]: base=0x000000023e600000, size=0x0000000100000000
        [    0.000000] OF: fdt: cap_mem_regions[1]: base=0x00000000e8000000, size=0x0000000008000000
        [    0.000000] OF: fdt: cap_mem_regions[2]: base=0x0000000100000000, size=0x0000000004000000

* patches from https://patch.msgid.link/20260629094746.191843-1-ruanjinjie@huawei.com
  riscv: kexec_file: Fix crashk_low_res not exclude bug
  crash: Add crash_prepare_headers() to exclude crash kernel memory
  arm64: kexec_file: Use crash_prepare_headers() helper to simplify code
  x86/crash: Use crash_prepare_headers() helper to simplify code
  riscv: kexec_file: Use crash_prepare_headers() helper to simplify code
  LoongArch: kexec_file: Use crash_prepare_headers() helper to simplify
    code
  powerpc/kexec_file: Use crash_exclude_core_ranges() helper
  arm64: kexec_file: Add support for crashkernel CMA reservation
  riscv: kexec_file: Add support for crashkernel CMA reservation
  powerpc/crash: sort crash memory ranges before preparing elfcorehdr

Link: https://patch.msgid.link/20260629094746.191843-1-ruanjinjie@huawei.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

0 files changed, 0 insertions, 0 deletions