[OpenBIOS] Back at it again( PCI Passthrough )

[Tarl Neustaedter]

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.