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

[Martin Willi]

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,
Martin