[PATCH v2 0/2] ARM: allow kernel mode NEON in softirq context

[Ard Biesheuvel]

On Mon, 12 Dec 2022 at 15:38, Martin Willi <martin at strongswan.org> wrote:
>
> Hi Ard,
>
> > Currently on ARM, we only permit kernel mode NEON in task context [...]
> > For IPsec packet encryption involving highly performant crypto
> > implementations, this results in a substantial performance hit [...]
>
> Thanks for your continued work on this.
>
> > Without these changes, an IPsec tunnel from a 32-bit VM to the 64-bit
> > host can achieve a throughput of 9.5 MB/s TX and 11.9 MB/s RX.
> >
> > When the crypto algorithm is permitted to execute in softirq context,
> > the throughput increases to 16.5 MB/s TX and 41 MB/s RX.
>
> In my tests on an Armada 385, I could increase IPsec throughput with
> ChaCha20/Poly1305 on RX from ~230 to ~260 MBit/s when using the NEON
> code path. So you may add my:
>
> Tested-by: Martin Willi <martin at strongswan.org>
>

Thanks!