[vfio-users] vfio help needed (nvidia GTX 750 Ti persistent code 43)

[Blank Field]

We still have i*-4xxx cpus in stock in my country.(hell, even socket 775 is
still can be found) So it depends on where do you live.
You will need VT-d. Or AMD-Vi.
All the recomendations are available on the blog, plus a very verbose guide
on how to glue it all together.
On Sep 17, 2015 11:05 AM, "Mogliii" <mogliii at gmx.net> wrote:

> On 9/17/2015 2:24 PM, Blank Field wrote:
>
> Read alex's blog at vfio.blogspot.com
> He has the same GPU and gives you hardware recommendations.
>
> I found it, but on the page it also says that " I wouldn't necessarily
> recommend this particular setup (it's probably only available on ebay
> anymore anyway)".
> Any specific chipset I should aim for? I guess the CPU (i3, i5 or i7)
> won't make a big difference as long as VTx is shown in the datasheet? The
> google docs file shows many older models that are not not sold anymore.
> Especially I would like to pick a motherboard that has proper iommu
> separation of the primary pcie-slot. So I don't need kernel patching.
>
> But it should be possible to make it work, but it took me a year to figure
> out how.
>
> Sorry, I have other things to do within the next year ^^
>
> On Sep 17, 2015 8:21 AM, "Mogliii" <mogliii at gmx.net> wrote:
>
>> OK, now this is a new information for me. I thought all along that my
>> problem is the graphics card.
>>
>> I tried to understand your whole message but I got lost at MMIO and PIO.
>> For the sake of saving my precious time and avoiding frustration, I
>> should better get a new motherboard and CPU? How high are the chances it
>> will work with my GXT750 Ti?
>> Any hardware suggestions (I have DDR3-1600 memory that I would like to
>> keep using)?
>>
>> Thank you
>>
>>
>>
>> On 9/17/2015 1:18 PM, Blank Field wrote:
>>
>> You have an AMD FM2 CPU.
>> Do use SeaBIOS and make use of VGA I/O lines, you must have a VideoBIOS
>> Extension support in your GPU's firmware. Since we are in the 21'st
>> century, you have it.
>> But the problem is that in order to make VGA work in a VM we must
>> translate MMIO, PIO and IRQs needed into the VM.
>> That is where IOMMU kicks in, and the related part of software is
>> vfio-pci's x-vga option.
>> Usually you enable x-vga, vfio tells IOMMU to translate all VGA related
>> stuff from GPU to the VM and vice versa, but on that particular
>> platform(AMD FM2) something is broken in hardware that crashes the IOMMU
>> and the CPU when trying to work with VGA.
>> On Sep 17, 2015 3:15 AM, "Alex Williamson" <alex.williamson at redhat.com>
>> wrote:
>>
>>> On Wed, Sep 16, 2015 at 6:06 PM, Mogliii <mogliii at gmx.net> wrote:
>>>
>>>> Dear Alex,
>>>>
>>>> What do you mean you are suspicious of pci-stub?
>>>> All tutorials I've seen so far require you to prevent nuveau from
>>>> grabbing the card. Also in your very well written tutorial I followed
>>>> and helped me a lot.
>>>> (
>>>> http://vfio.blogspot.jp/2015/05/vfio-gpu-how-to-series-part-3-host.html
>>>> )
>>>>
>>>> I just tried the MSI GTX 750 Ti with Bios mode (bios selection switch ->
>>>> 1, followed by host reboot). But it behaves the same. I see the ovmf
>>>> bios and boot splash, but then loss of signal.
>>>>
>>>
>>> It's not that you're using pci-stub, it's that pci-stub is built as a
>>> module on your kernel and you need to be sure to put all the pieces in
>>> place to make sure that module gets loaded before anything else that might
>>> touch the device.  As I said, it appears to be working, but you're still
>>> getting a code 43.
>>>
>>> _______________________________________________
>>> vfio-users mailing list
>>> vfio-users at redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>
>>>
>>
>
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