[PATCH] powerpc: add `cur_cpu_spec` symbol to vmcoreinfo

Michael Ellerman mpe at ellerman.id.au
Thu Sep 14 23:22:40 AEST 2023

Sachin Sant <sachinp at linux.ibm.com> writes:
>> On 11-Sep-2023, at 2:44 PM, Aditya Gupta <adityag at linux.ibm.com> wrote:
>> Presently, while reading a vmcore, makedumpfile uses
>> `cur_cpu_spec.mmu_features` to decide whether the crashed system had
>> RADIX MMU or not.
>> Currently, makedumpfile fails to get the `cur_cpu_spec` symbol (unless
>> a vmlinux is passed with the `-x` flag to makedumpfile), and hence
>> assigns offsets and shifts (such as pgd_offset_l4) incorrecly considering
>> MMU to be hash MMU.
>> Add `cur_cpu_spec` symbol and offset of `mmu_features` in the
>> `cpu_spec` struct, to VMCOREINFO, so that the symbol address and offset
>> is accessible to makedumpfile, without needing the vmlinux file
>> Signed-off-by: Aditya Gupta <adityag at linux.ibm.com>
>> ---
> Thanks for the patch. With this patch applied (along with makedumpfile changes)
> I am able to capture vmcore against a kernel which contains commit 8dc9a0ad0c3e

I can't find that commit? Was just wondering if it should be referenced
in the commit message.


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