[PATCH v3 0/2] kexec-tools: arm64: Enable D-cache in purgatory

Pratyush Anand panand at redhat.com
Fri Jun 2 07:32:25 PDT 2017


Hi Ard,

Thanks for all the inputs.

On Friday 02 June 2017 05:14 PM, Ard Biesheuvel wrote:
>> Alternatively, a SHA-256 implementation that uses movz/movk sequences
>> instead of ldr instructions to load the round constants would already
>> be 5x faster, given that we don't need page tables to enable the
>> I-cache.
> Actually, looking at the C code and the objdump of the kernel's
> sha256_generic driver, it is likely that it is already doing this, and
> none of the points I made actually make a lot of sense ...
>
> Pratyush: I assume you are already enabling the I-cache in the purgatory?

It's not enabled yet. But, I had tried first with enabling only I-cache, but 
that did not make much difference in execution time.

~Pratyush





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