Probing for native availability of isel from userspace

[Segher Boessenkool]

>> Fine. But I believe that mfpvr emulation came first, which is the  
>> point
>> I object to (see the mess that the fact that CPUID is available to
>> applications made to x86 when SSE registers were added).
>
> Heh, possibly, I don't remember... I added the cputable, I think we
> added mfpvr because we didn't have anything, then I added cputable  
> which
> got us the HW caps, but some old stuff still relied on mfpvr so we
> couldn't completely remove it.

If I have my history right end up, MFPVR emulation was added for MoL.
Which is funny (if you like that kind of thing) because it now hurts
all other "hypervisor in userspace" kind of things, that might want
to lie in their emulated PVR...


Segher