Re: [kvm-devel] [PATCH] gfxboot VMX workaround v2

[Avi K. <av...@qu...>]

Anthony Liguori wrote:
>
> I'd prefer you not do an emulate_instruction loop at all.  Just 
> emulate one instruction on vmentry failure and let VT tell you what 
> instructions you need to emulate.
>
> It's only four instructions so I don't think the performance is going 
> to matter.  Take a look at the patch I posted previously.

Once we remove the other VT realmode hacks, we may need more 
instructions emulated.  Consider for example changing to real mode 
without reloading fs and gs; this will cause all real mode code to be 
emulated.

However, there's no need to do everything at once; the loop can 
certainly be added later when we have a proven need for it.


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.