Bhyve GPU passthrough

[Adam]

There was a thread here a while back about some adventurer trying to
passthrough an Nvidia GPU which ultimately did not work.  Unfortunately
that still seems to be the case.  I'm using 12.x and I could not get it to
work in FreeBSD, Linux, or Windows guest.  Win10 wouldn't even boot with it
passed through.  Linux wouldn't load the driver(could have been me) and
FreeBSD guest loaded the driver, but I could not do anything useful with
the card.  For example, nvidia-smi -q reported No devices were found.  Here
is the guest view:

vgapci0 at pci0:0:1:0:     class=0x030000 card=0x77101558 chip=0x1f5010de
rev=0xa1 hdr=0x00
    vendor     = 'NVIDIA Corporation'
    device     = 'TU106BM [GeForce RTX 2070 Mobile]'
    class      = display
    subclass   = VGA
    bar   [10] = type Memory, range 32, base 0xc0000000, size 16777216,
enabled
    bar   [14] = type Prefetchable Memory, range 64, base 0xd000000000,
size 268435456, enabled
    bar   [1c] = type Prefetchable Memory, range 64, base 0xc2000000, size
33554432, enabled
    bar   [24] = type I/O Port, range 32, base 0x2000, size 128, enabled
    cap 01[60] = powerspec 3  supports D0 D3  current D0
    cap 05[68] = MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[78] = PCI-Express 2 legacy endpoint max data 128(256) FLR RO NS
                 link x16(x16) speed 2.5(8.0) ASPM disabled(L0s/L1)

I believe in earlier discussion there was objection to overcoming Nvidia's
virtualization restrictions, but I think since then both vmware and kvm
have implemented workarounds to allow for this.

Is anyone one currently working on this or needs some testing done?

-- 
Adam