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...ow this works would be useful. > VMD device 28C0 natively assists passthrough by providing the Host > Physical Address in shadow registers accessible to the guest for bridge > window assignment. The shadow registers are valid if bit 1 is set in VMD > VMLOCK config register 0x70. Future VMDs will also support this feature. > Existing VMDs have config register 0x70 reserved, and will return 0 on > reads. So these shadow registers are simply exposing the host BAR2 & BAR4 addresses into the guest, so the quirk is dependent on reading those values from the device before anyone h...

...; > VMD device 28C0 natively assists passthrough by providing the Host > > > Physical Address in shadow registers accessible to the guest for bridge > > > window assignment. The shadow registers are valid if bit 1 is set in VMD > > > VMLOCK config register 0x70. Future VMDs will also support this feature. > > > Existing VMDs have config register 0x70 reserved, and will return 0 on > > > reads. > > > > So these shadow registers are simply exposing the host BAR2 & BAR4 > > addresses into the guest, so the quirk is dependent on...