bhyve: passthrough of PCIe device without MSI possible?

[Mario Lobo]

Hi Felix;

I had the same impression and I was attempting to do the same with no
success.

Have you managed to make it work?

2018-05-11 12:26 GMT-03:00 Felix Palmen <felix at palmen-it.de>:

> I have the following PCIe card on a host running 11.1-RELEASE:
>
> | ppt0 at pci0:5:0:0:      class=0x078000 card=0x00011b74 chip=0x08101b74
> rev=0x14 hdr=0x00
> |     vendor     = 'OpenVox Communication Co. Ltd.'
> |     class      = simple comms
>
> it doesn't support MSI according to `pciconf -lbc`:
>
> | ppt0 at pci0:5:0:0:    class=0x078000 card=0x00011b74 chip=0x08101b74
> rev=0x14 hdr=0x00
> |     bar   [10] = type Memory, range 32, base 0xdfe00000, size 524288,
> enabled
>
> Trying to pass this card to a guest using `vm-bhyve` gives me the
> following in `bhyve.log`:
>
> | bhyve: failed to initialize MSI for PCI 5/0/0
>
> and this in `vm-byve.log`:
>
> | [bhyve options: -c 2 -m 2G -Hwl bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd
> -U 9f2546f5-5464-11e8-8b52-d05099c0f275 -S]
> | [bhyve devices: -s 0,hostbridge -s 31,lpc -s
> 4:0,virtio-blk,/dev/zvol/zroot/vm/pbx/disk0 -s
> 5:0,virtio-net,tap2,mac=58:9c:fc:00:d7:6b -s 6:0,passthru,5/0/0 -s
> 7:0,fbuf,tcp=0.0.0.0:5900]
> | [bhyve console: -l com1,/dev/nmdm0A]
> | [bhyve iso device: -s 3:0,ahci-cd,/var/vm/.config/null.iso]
> | starting bhyve (run 1)
> | bhyve exited with status 1
>
> Now .. is it actually possible to pass such a device to a bhyve guest?
> From the code comment here:
> <https://github.com/freebsd/freebsd/blob/master/usr.sbin/bhy
> ve/pci_passthru.c#L257>
> I assumed MSI would be "emulated" if necessary?
>
> TIA, Felix
>
> --
>  Dipl.-Inform. Felix Palmen  <felix at palmen-it.de>   ,.//..........
>  {web}  http://palmen-it.de  {jabber} [see email]   ,//palmen-it.de
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-- 
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!]