arm64: kexec_file: add crash dump support

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Enabling crash dump (kdump) includes
* prepare contents of ELF header of a core dump file, /proc/vmcore,
  using crash_prepare_elf64_headers(), and
* add two device tree properties, "linux,usable-memory-range" and
  "linux,elfcorehdr", which represent respectively a memory range
  to be used by crash dump kernel and the header's location

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Tested-and-reviewed-by: Bhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>

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AKASHI Takahiro 2019-12-16 11:12:47 +09:00 • committed by Will Deacon

parent c273a2bd8a

commit 3751e728ce

3 changed files with 106 additions and 8 deletions

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4

arch/arm64/include/asm/kexec.h

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4

arch/arm64/kernel/kexec_image.c

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106

arch/arm64/kernel/machine_kexec_file.c

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