Re: ABI change for device drivers using future AVX instruction set

[Avi Kivity]

Andi Kleen wrote:
> > > > We could change kernel_fpu_begin() not to disable
> > > > preemption, but instead set a task flag.  When we get the "no device"
> > > > fault, if the flag is set, save the fpu state into the kernel fpu save
> > > > area     
> > > >         
> > > What kernel fpu save area do you mean?
> > >   
> > >       
> > A new one, of course.
> >
> >     
>
> With that we would be eventually in the mess Agner talked about.
>
>   

If you use xsave, I don't see how this is different to the user fpu save 
area.

--
error compiling committee.c: too many arguments to function

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