On Fri, 2010-09-17 at 00:17 -0500, Kumar Gala wrote:

Not sure how the 970 bit worked, but this seems a bit problematic for
switching between kernel and application for how we do this on
e500mc/e5500.  We'd have to touch the control bit on every exception
path which seems ugly to me.

Unless the kernel uses dcbzl (feature fixup replacement ?)

In that case it's on context switch only.

Cheers,
Ben.