I would really love to find a legit answer Re: what chipsets/mobos
support gfx i/o fwd before I splash out hundreds of dollars.
AFIAK forwarding graphics devices requires a lot more special sauce than
regular pci devices (like network interfaces)
On my propitiatory-firmware intel laptop dmesg says
"DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics"
So apparently you need a shadow gart for it to work, something that is
above my paygrade.
It would be really great if there was an IOMMU/GFX bit on the coreboot
supported motherboards page as this is a common question that never
finds anything more than anecdotal evidence. I am grateful for your help
mike but running grep commands on the source files provides nothing more
than just that.
On 10/03/2016 07:09 PM, Mike Banon wrote:
Correct me if I am wrong, but I think: IOMMU support means that a
graphics card passthrough is possible (this is binary: IOMMU yes ==>
possible / no ==> not possible). If IOMMU support is buggy (which
seems to be commonly found with proprietary BIOS) maybe your system
could experience some bugs while you are using this feature. Of course
the most reliable way to find out is to try it, but I am pretty sure
that coreboot's IOMMU support is good
On Sun, Oct 2, 2016 at 9:04 PM, Zoran Stojsavljevic
<zoran.stojsavlje...@gmail.com> wrote:
Would it be possible to passthrough a graphics card to a virtual machine
while using Coreboot/Libreboot?
Hello opteron/AMD supporter,
You did ask very (very, should say extremely) tricky question, you do know
this (I betcha you do, don't you)??? ;-)
Zoran
_______
On Sun, Oct 2, 2016 at 6:22 PM, <opte...@keemail.me> wrote:
Hi,
would it be possible to passthrough a graphics card to a virtual machine
while using Coreboot/Libreboot? The libreboot website says that the
motherboard offers full IOMMU-support when using a CPU from the Opteron
6200/6300 series.
https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF
https://libreboot.org/docs/hcl/kgpe-d16.html
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