[vfio-users] vfio, xeon e3s, acs, & gpus -- oh my!

[Steven Walter]

On Mon, Apr 3, 2017 at 1:08 PM,  <globalgorrilla at fastmail.fm> wrote:
> On 2 Apr 2017, at 0:10, Joshua Hoblitt wrote:
>
>> I decided to go with an E6-1650 v4 / C612 based motherboard as I wanted
>> both ECC memory and a BMC.
>
>
> I think something this is the best option for the moment.
>
> Posted-interrupts are only on E5 v4 and Xeon-D.
>
> It makes a big difference with network cards (and GPUs).
>
> Does anyone know if AVIC or some other Ryzen feature provides for
> posted-interrupts?

By "posted interrupts" do you mean that they get delivered directly to
the VM, bypassing the host?  If so, then yes enabling AVIC does
provide that behavior.  With AVIC enabled (kvm_amd.avic=1), I do not
see the counters in /proc/interrupts increment for passed-through
devices.
-- 
-Steven Walter <stevenrwalter at gmail.com>