Re: [Xen-devel] [PATCH v3 5/8] x86emul: support MOVDIR{I, 64B} insns

[Jan Beulich <jbeulich@xxxxxxxx>]

On 03.09.2019 12:28, Andrew Cooper wrote:
> On 03/09/2019 10:39, Jan Beulich wrote:
>> Note that SDM revision 070 doesn't specify exception behavior for
>> ModRM.mod != 0b11; assuming #UD here.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
> What are we going to do about the ->write() hook atomicity?  I'm happy
> to put it on the TODO list, but we can't simply ignore the problem.

So do you not agree with my assessment that our memcpy()
implementation satisfies the need, and it's just not very
nice that the ->write() hook is dependent upon this?

Jan

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