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

Michael Ellerman mpe at ellerman.id.au
Thu Sep 14 23:22:01 AEST 2023

Aditya Gupta <adityag at linux.ibm.com> writes:
> 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

This looks fine.

Seems like cpu_features would be needed or at least pretty useful too?


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