[coreboot] VT-d support

[Himanshu Chauhan]

> On 05-Jun-2017, at 9:41 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?  

BIOS adds DMAR and other entries in the ACPI table. I am not quite sure how these entries are formed exactly though.

https://www.mjmwired.net/kernel/Documentation/Intel-IOMMU.txt

http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/vt-directed-io-spec.pdf

Is anybody working on this?

Regards
Himanshu