Re: [Xen-devel] Invalid op code emulation for HVM guest and GPF

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 23/03/12 19:30, Mukesh Rathor wrote:
> On Fri, 23 Mar 2012 19:20:58 +0000
> Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
>
>> Patch attached.
>>
>> Not tested, but seems logically correct.
>>
>> @Mukesh: Do you mind testing please?
>>
> Sure. Let me build xen with fix and give to Dtrace developers.
>
> thanks,
> Mueksh

Sadly, given your other email, I doubt it will work, because of the big
catch all regarding the lock prefix.

A brief scan over the Intel manuals and I cant see a case where an
incorrect LOCK prefix would cause #GPF rather than #UD.

Perhaps try changing it to EXP_UD instead of EXP_GP.  (Although I make
no guarantee that this wont cause a lot of things to break.)

-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com


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