[coreboot] VT-d support

Zoran Stojsavljevic zoran.stojsavljevic at gmail.com
Mon Jun 5 18:39:19 CEST 2017

> what support does it need?

Intel Virtualization Technology for Directed I/O" (VT-d). VT-d is a
virtualized IOMMU, so by using HYP type 1 there should be a VT-d driver
supporting VT-d HW extension (?), as my best understanding is

The practical implications are Graphics and Network Connectivity in Guests.
DMA Remapping is the feature of VT-d.

Good net pointer to read: https://unix.stackexchange.com/questions/34428/do-

> Is anybody working on this?

Don't think so... If anything is done, I guess, it is done by simplistic
implementation of the feature called: pass-through (so guest by its own
drivers is using directly platform devices' HW bypassing HYP1, my best


On Mon, Jun 5, 2017 at 6:11 PM, ron minnich <rminnich at gmail.com> wrote:

> On Mon, Jun 5, 2017 at 9:00 AM Himanshu Chauhan <hschauhan at nulltrace.org>
> wrote:
>> Hi,
>> VT-d requires support from BIOS. Does coreboot support VT-d?
> what support does it need?
> --
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