Re: [Xen-devel] Xen virtual IOMMU high level design doc V3

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.11.16 at 16:36, <tianyu.lan@xxxxxxxxx> wrote:
> 2) Build ACPI DMAR table in toolstack
> Now tool stack can boot ACPI DMAR table according VM configure and pass
> though it to hvmloader via xenstore ACPI PT channel. But the vIOMMU MMIO
> region is managed by Qemu and it's need to be populated into DMAR
> table. We may hardcore an address in both Qemu and toolstack and use the 
> same address to create vIOMMU and build DMAR table.

Let's try to avoid any new hard coding of values. Both tool stack
and qemu ought to be able to retrieve a suitable address range
from the hypervisor. Or if the tool stack was to allocate it, it could
tell qemu.

Jan


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