On Wed, 2013-08-14 at 14:21 +0100, Sudeep KarkadaNagesha wrote:

IMO moving of handling ibm,ppc-interrupt-server#s to generic code
under
#ifdef CONFIG_PPC seems to be cleaner approach than weak definitation.

As per my understanding each thread is a different logical cpu.
Each logical cpu is mapped to unique physical id(either present in reg
field or legacy ibm,ppc-interrupt-server#s field). So given a logical
cpu id we can get the cpu node corresponding to it.
Looking @ smp_setup_cpu_maps in arch/powerpc/kernel/setup-common.c
and the comment in the same file: "This implementation only supports
power of 2 number of threads.." the thread id id is implicit in the
logical cpu id. Do we need to fetch that from DT ?

I don't want those parsing routines to make those assumptions. We have
changed our logical numbering in the past and may again.

Cheers,
Ben.