Re: [OpenBIOS] Back at it again( PCI Passthrough )

[Jd Lyons]

> On May 7, 2018, at 5:21 AM, Jd Lyons  wrote:
>
> Sorry, I wasn’t clear, no trouble executing this in Apple’s Open Firmware implementation. I’ve moved back to Openbios to see if I can get PCI Passthough working with Qumu-system-ppc.
>
> The host is an AMD B350 board running Debian 9. With a Geforce 6600 PCI-E card from a G5.
> > On May 6, 2018, at 10:25 PM, Joe van Tunen  wrote:
> >
> > I'm not sure about QEMU. Jd Lyons is getting the exception using Apple's Open Firmware implementation on a Quicksilver PowerMac G4.
> >
> > On 5/6/18, 5:21 PM, "OpenBIOS on behalf of Tarl Neustaedter" <[e-mail] on behalf of [e-mail]> wrote:
> >
> > For what it's worth:
> >
> > On 2018-May-6 20:12 , Joe van Tunen wrote:
> > > b(lit) 0xff
> > >   and 
> > >   my-space
> > >
> > > (unnamed-fcode) [0xa08] 
> > >   b(lit) 0x6
> > >   and 
> > >   b(lit) 0x4
> > >   =
> >
> > That sequence is probably testing a BAR for 64-bit capability. Bits 1-2
> >   are the type of memory referenced by a BAR (0=IO, 1=32-bit mem, 2=64-bit
> >   mem).
> >
> > https://en.wikipedia.org/wiki/PCI_configuration_space#Bus_enumeration
> >
> > Does QEMU do something funny with 64-bit BARs? An NVIDIA card is almost
> >   certain to have 64-bit addressing in at least one BAR, and if QEMU
> >   doesn't support it, bad things may be happening.