[Linuxppc-users] AES NX Coprocessor dm-crypt support

[dftxbs3e at free.fr]

Hello,

I am interested in support for the NX AES Coprocessor as described in 
section 11.1 and 25.3 of the POWER9 User Manual ( 
https://wiki.raptorcs.com/w/images/8/89/POWER9_um_OpenPOWER_v20GA_09APR2018_pub.pdf 
) in Linux's dm-crypt.

Currently I am using LUKS on NVMe drives that advertise having 3.2GB/s 
read speeds (Samsung) and I am currently capped to 1GB/s with current 
on-chip instructions (vcipher etc).

If we consider the advertised performance for the NX Coprocessors and my 
dual CPU system, two NX engines per CPU (6.4 * 2 * 2), it would total 
for 25.6 Gbps 256bit AES performance which equals 3.2GB/s. That would 
allow me to use LUKS over my NVMe drives without performance loss, which 
is needless to say, quite awesome.

Another significant benefit of this would be XMR mining, the current 
latest POWER miner does not make use of NX coprocessors. ( 
https://github.com/madscientist159/xmrig ).

How would I go about this? Currently there's a gzip implementation at 
https://github.com/abalib/power-gzip - it's cited in the manual.

PS: I'm part of an active community around POWER9 and the Talos II 
systems at #talos-workstation on Freenode IRC, feel free to join and 
ping JSharp, tpearson, koenigni, awordnot or (myself) dftxbs3e about 
this.

Thanks