Avi Kivity <[email protected]> wrote:
> > Can you think of a case where we need to perform alignment checking in
> > the emulator?
>
> The case that x86/svm.c is checking for is a security issue.
>
> Guests don't normally turn eflags.AC on, so I don't expect issues
> there. I also don't see issues with SSE alignment, especially as AVX
> removes it (for VEX encoded instructions). However, it's good to stick
> to the spec, there are always surprise issues when you don't.
>
Isn't it make sense to add Documentation/virtual/kvm/emulator.txt at some
point in the future?
In some cases it is difficult to know the underlying assumptions.
Explanations about the emulator specific macros may also be helpful.
Takuya
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