Re: [Xen-devel] [PATCH 15/16] xen/vtd: prevent from assign the device with shared rmrr

[Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>]

On Fri, Sep 4, 2015 at 2:17 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:

>>> On 03.09.15 at 21:39, <tamas.k.lengyel@xxxxxxxxx> wrote:
> So this change in 4.6 prevents me from passing through devices that have
> worked previously with VT-d:
>
> (XEN) [VT-D] cannot assign 0000:00:1a.0 with shared RMRR at ae8a9000 for
> Dom30.
> (XEN) [VT-D] cannot assign 0000:00:1d.0 with shared RMRR at ae8a9000 for
> Dom31.
>
> The devices are the USB 2.0 devices on a DQ67SW motherboard:
>
> 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
> Family USB Enhanced Host Controller #2 (rev 04)
> 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
> Family USB Enhanced Host Controller #1 (rev 04)

Please don't top post. And I'm also puzzled by you sending this to
Ian rather than the author.

Hm, I've just hit reply-all to the latest message I've found in the thread.

Â

Technically - Tiejun, should this perhaps be permitted in relaxed
mode, at least until group assignment gets implemented? (Or
Tamas, do you actually mean to assign these to _different_
guests, considering the log fragment above?)

No, I actually want to assign them to the same domain. The domain creation fails with either of those devices specified for passthrough whether they are to be attached to the same domain or not.

Tamas

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