Re: [PATCH v7 00/15] x86/hvm: I/O emulation cleanup and fix | Full Backtrace of domU's X crash caused by SSE2 istruction in attachment

[Zhi Wang <zhi.a.wang@intel.com>]

Hi Gurus:
     We found that MOVD instruction are used by some windows driver 
during developing XenGT, and also we found this one:

(XEN) MMIO emulation failed: d7v1 64bit @ 0010:fffff8000294e273 -> 66 0f 
e7 00 48 83 c0 10 45 3
b cb 73 f0 45 85 c9

If anyone can help us to upstream this one into instruction emulator and 
plus the MOVD instruction emulation, that will be nice. :)

Thanks,
Zhi.

于 07/10/15 19:00, Jan Beulich 写道:
>>>> On 10.07.15 at 12:51, <fabio.fantoni@m2r.biz> wrote:
>> Il 10/07/2015 12:20, Jan Beulich ha scritto:
>>> Other than MOVD, MOVAPS is already being supported by the
>>> insn emulator.
>>>
>> Then why do you think MOVAPS fails in my test?
>
> No idea. That's what Paul asked you to narrow down.
>
>> Sse2 was introduced in cpus 11 years ago, so I think it would be useful
>> to add support for all missing instructions to avoid more cases like
>> this (and it seems to improve performance too, comparing the same task
>> executed with/without sse2).
>
> The reason we didn't add any more of the SSE insns so far is that
> we don't expect them to be used for accessing MMIO. Once we
> learn they're needed, we'll add emulation for them, but you
> realize this is a significant task?
>
> Jan
>

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