[PATCH v32 00/13] arm64: add kdump support

Goel, Sameer sgoel at codeaurora.org
Wed Mar 1 16:51:21 PST 2017

On 2/7/2017 1:06 AM, AKASHI Takahiro wrote:
> This patch series adds kdump support on arm64.
> To load a crash-dump kernel to the systems, a series of patches to
> kexec-tools[1] are also needed. Please use the latest one, v5 [2].
> For your convinience, you can pick them up from:
>    https://git.linaro.org/people/takahiro.akashi/linux-aarch64.git arm64/kdump
>    https://git.linaro.org/people/takahiro.akashi/kexec-tools.git arm64/kdump
> To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use
>   - crash utility (v7.1.8 or later, i.e. master for now) [3]
> I tested this patchset on fast model and hikey.
> (under various configurations, in particular 4KB-page/39,48-bits, 64KB-page/42
> -bits with hibernate)
> The previous versions were also:
> Tested-by: Pratyush Anand <panand at redhat.com> (v29, mustang and seattle)
> Tested-by: James Morse <james.morse at arm.com> (v27, Juno)
I tested this patch set on a QDT2400 device with 4k 4-level setup. This patchset worked after applying [1].

[1] [PATCH] efi/libstub/arm*: Set default address and size cells values for an empty dtb

Without the above patch the start address of the crash kernel is recorded incorrectly and the 
memblock_cap_memory_range clears out the incorrect range. 
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