FreeBSD POWER9 status

[Kevin Bowling]

Justin,

This is a great accomplishment!  Looking forward to receiving my Talos
so I can join in on the fun.

Regards,
Kevin

On Sat, May 26, 2018 at 3:31 PM, Justin Hibbits <jhibbits at freebsd.org> wrote:
> Hello fellow PowerPC'ers,
>
> Over the last 4 weeks I've been working on the FreeBSD port to POWER9,
> 3 weeks of which were on my physical hardware (Raptor Talos II).  As
> of last night, FreeBSD can boot to multiuser mode, with the addition
> of two patches not yet committed for enabling PCI, and I plan to
> commit those in the next few days.  The patches can be found at:
>
> https://reviews.freebsd.org/D15461
> https://reviews.freebsd.org/D15566
>
> What works (with patches):
> * Boots to a USB stick
> * OPAL sensors for temperature, voltage, power, etc
> * OPAL IPMI (tested only for attachment)
> * Interrupts via XIVE XICS emulation
> * Everything already done for powernv by Semihalf (NVMe, OPAL UART)
>
> What's left:
> * No display via AST2500 BMC VGA
> * All threads currently spin-idle, rather than halting for idle, this
> wastes CPU cycles, and reduces performance for other threads.  I hope
> to get this fixed in the next few days.
> * Power management and cpufreq
> * hwpmc
> * Performance optimizations as we find them
> * Full PCI handling.  There are a lot of capabilities not currently handled.
> * Interrupts via XIVE exploitation.  This should improve stability and
> performance of the XIVE controller.
>
> Special thanks to our newest committers, Leandro Lupori and Breno
> Leitao, for their help with the bring-up.  Special thanks also to
> Benjamin Herrenschmidt from IBM for providing the key insights to
> fixing PCI and interrupts.
>
> - Justin
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