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Re: [Xen-devel] Is it safe to hvm_emulate_one() an MMX instruction?

>>> On 17.04.13 at 12:40, Razvan Cojocaru <rzvncj@xxxxxxxxx> wrote:
>>  So do you mean an MMX instruction, or MOVDQU (which is an XMM
>> one)? In any event, 4.2 and later should be fine with this particular
>> instruction (and a few more move variants), but 4.1.x and earlier
>> won't be, nor does the emulator support the whole spectrum of
>> MMX, XMM, and AVX instructions.
> In this particular case, MOVDQ, but I'm interested in all the mentioned
> types of instructions.
> What happens when a HVM guest tries to execute such an unsupported
> instruction, via the hypervisor calling hvm_emulate_one()? Does
> hvm_emulate_one() not return X86EMUL_OKAY - is testing for that enough?

Supposedly yes.


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