Re: [PATCH 0/5] crypto: add IV generation templates

[Mark Brown <broonie@kernel.org>]

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On Fri, Jul 20, 2018 at 09:23:15PM +0900, Ard Biesheuvel wrote:
> On 20 July 2018 at 20:45, Mark Brown <broonie@kernel.org> wrote:

> > I have to confess I didn't look at their in tree driver, looking briefly
> > now it looks awfully like the hardware should be able to chain IV
> > generation together with encryption without bothering the CPU which
> > would be good enough.

> Indeed interesting. But afaict, that would still mean that the IV
> generation transform and the payload transform would be expressed as a
> single crypto algorithm, e.g., 'dm(essiv-foo(aes),gcm(aes)), or the DM
> layer would still need to be involved in sequencing one operation
> after the other, and I don't think any of that support is in the
> current series. But I'm just a drive by reviewer here, so please
> correct me if I am wrong.

Yeah, I'm also a bit of a drive by here and not seeing how the two are
joined up at present, but it may be a case of needing to get this and/or
other drivers fixed rather than the hardware lacking the capability.

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