Re: [PATCH v17 00/15] arm64: MMU enabled kexec relocation

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On Thu, Sep 16, 2021 at 07:13:10PM -0400, Pasha Tatashin wrote:
> Pasha Tatashin (15):
>   arm64: kernel: add helper for booted at EL2 and not VHE
>   arm64: trans_pgd: hibernate: Add trans_pgd_copy_el2_vectors
>   arm64: hibernate: abstract ttrb0 setup function
>   arm64: kexec: flush image and lists during kexec load time
>   arm64: kexec: skip relocation code for inplace kexec
>   arm64: kexec: Use dcache ops macros instead of open-coding
>   arm64: kexec: pass kimage as the only argument to relocation function
>   arm64: kexec: configure EL2 vectors for kexec
>   arm64: kexec: relocate in EL1 mode
>   arm64: kexec: use ld script for relocation function
>   arm64: kexec: install a copy of the linear-map
>   arm64: kexec: keep MMU enabled during kexec relocation
>   arm64: kexec: remove the pre-kexec PoC maintenance
>   arm64: kexec: remove cpu-reset.h
>   arm64: trans_pgd: remove trans_pgd_map_page()

FWIW, I'm fine with this series. I think the only concern raised by
James and not addressed is the possibility of the failure of the memory
allocation for copying the page tables during kexec. If anyone will
complain in the future, we can look into adding a fallback mechanism to
do the relocation with the MMU off.

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>




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