On Wed, Mar 04, 2020 at 07:48:54AM -0800, Jacob Pan wrote:
> For emulated VT-d IOMMU, GIOVA can also be build as first level page
> tables then pass to the host IOMMU to bind. There is no need to shadow
> in this case, pIOMMU will do nested translation and walk guest page
> tables.
Right, but that requires hardware support. A pure software emulation of
VT-d requires the full shadow of the guest io-page-table.
> I thought we have the universal device properties to abstract DT and
> ACPI (via _DSD). Is that an option?
I don't know whether this was considered, Jean-Philippe?
Regards,
Joerg
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