On Thu, Apr 13, 2017 at 08:00:47PM +1000, Michael Ellerman wrote: > Michael Neuling <mi...@neuling.org> writes: > > > On Wed, 2017-04-12 at 17:16 +0530, Gautham R. Shenoy wrote: > >> From: "Gautham R. Shenoy" <e...@linux.vnet.ibm.com> > >> > >> This patch ensures that POWER8 and POWER9 processors use the correct > >> value of IDLE_THREAD_BITS as POWER8 has 8 threads per core and hence > >> the IDLE_THREAD_BITS should be 0xFF while POWER9 has only 4 threads > >> per core and hence the IDLE_THREAD_BITS should be 0xF. > > > > Why don't we derive this from the device tree rather than hard wiring it > > per cpu > > type? > > Right. > > In fact we already have threads_per_core which is exactly that.
Ok. I will convert IDLE_THREAD_BITS to a variable instead of a macro so that the variable holds the value (1 << threads_per_core) - 1. > > cheers >
