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

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 23/03/12 19:38, Andrew Cooper wrote:
> 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.)

Try this patch instead.

I have still yet to find a single example in either manual 2A or B where
an invalid lock prefix would cause a #GPF rather than #UD

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

Attachment: x86_emulate_nop.patch
Description: Text Data

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