Re: [Xen-devel] [PATCH RFC] VT-d: honor firmware-first mode in XSA-59 workaround code

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 22/05/14 11:06, Jan Beulich wrote:
>>>> On 22.05.14 at 11:34, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 22/05/14 08:13, Jan Beulich wrote:
>>>>>> On 21.05.14 at 18:33, <andrew.cooper3@xxxxxxxxxx> wrote:
>>>> The exact problem was a 2.6.32 kernel ignoring firmware-first and
>>>> disabling reporting on the root ports but not endpoint devices, causing
>>>> the SMM handler to fail to find the issue, and fail to clear the SMI.
>>>>
>>>> However, as part of the investigation, we identified that Xen was also
>>>> violating firmware-first as part of XSA-59
>>> So has a problem solely with the XSA-59 workaround (i.e. without an
>>> ignorant kernel) then been observed at all?
>> Correct
> "Correct" isn't really a meaningful answer to the question; I guess
> you mean "yes".
>
> Jan
>

Sorry - I misread the question.

No.  We have not observed an issue from XSA-59.

The version of XenServer we had the issue with didn't contain any of the
XSA-59 fixes at the point that the problem was observed.

~Andrew

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