On Thu, Jun 18, 2015 at 10:11:58AM +0100, Michael Ellerman wrote: > On Wed, 2015-06-17 at 11:15 +0100, Will Deacon wrote: > > On Wed, Jun 17, 2015 at 10:43:48AM +0100, Andre Przywara wrote: > > > Instead of referring to the Linux header including the barrier > > > macros, copy over the rather simple implementation for the PowerPC > > > barrier instructions kvmtool uses. This fixes build for powerpc. > > > > > > Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> > > > --- > > > Hi, > > > > > > I just took what kvmtool seems to have used before, I actually have > > > no idea if "sync" is the right instruction or "lwsync" would do. > > > Would be nice if some people with PowerPC knowledge could comment. > > > > I *think* we can use lwsync for rmb and wmb, but would want confirmation > > from a ppc guy before making that change! > > Ugh, memory barriers :) I prefer to call them "Job Security" :) > You probably can use lwsync, assuming you're only ordering cacheable vs > cacheable. > > But, lwsync has given us pain in the past[1], so I'd be happier if you just used > sync. No probs. I pushed Andre's original patch. Will -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
