Re: VT-d interrup remapping errata workaround

[Malcolm Crossley <malcolm.crossley@citrix.com>]

On 09/07/13 07:40, Jan Beulich wrote:
>>>> On 08.07.13 at 19:11, Neil Horman <nhorman@tuxdriver.com> wrote:
>> Thank you I'll see if I can find an online version to point others to, but
>> regardless, errata 61 seems to be the kicker here.  Looks like we need to add
>> and new pci id to the quirk, and check for some additional revisions if that one
>> is seen.  I'll get to it shortly.  Thanks for sending this out.  Lets hope this
>> problem doesn't exist in even more chipsets.
> Erratum 61? That doesn't require remapping to be disabled as
> workaround. 62 and 69 do.
>
> But you make a very good point regarding revisions: 62 also
> applies to rev 0x12, and 69 applies to both 0x12 and 0x22.
> Xen doesn't check for either of them right now. Malcolm - this
> in turn means that keying off of device ID 0x342e indeed isn't
> correct/complete. Are you going to be able to submit a Xen
> side fix relatively soon, or shall I take care of this?
I didn't notice that errata 69 is not listed as fixed on rev 0x22 for 
the X58
chipset, sorry about that.

Have we had confirmation from Intel about this particular errata affecting
the X58? It seems strange that they both have the same revision ID but
different fixes for errata. If we have got confirmation then I'll create 
a patch
straight away, I'll try our Intel contacts as well, it might speed 
things up a bit.

Malcolm

> Jan
>