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membar
2020 May 13
0
[PATCH for QEMU v2] hw/vfio: Add VMD Passthrough Quirk
...roc/iomem output and/or lspci listing from the host to see how this
> > works would be useful.
> Correct. So MMU not IOMMU.
>
> In the guest kernel, the bridges and devices in the VMD domain are
> programmed with the addresses provided in the VMD endpoint's BAR2&4
> (MEMBAR1&2). Because these BARs are populated with guest addresses, MMU
> translates to host physical and the bridge window rejects MMIO not in
> its [GPA] range.
>
> As an example:
> Host:
> 94000000-97ffffff : 0000:17:05.5
> 94000000-97ffffff : VMD MEMBAR1
> 940000...