powerpc: Make core sibling information available to userspace

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Implement the notion of "core siblings" for powerpc.  This makes
/sys/devices/system/cpu/cpu*/topology/core_siblings present sensible
values, indicating online CPUs which share an L2 cache.

BenH: Made cpu_to_l2cache() use of_find_node_by_phandle() instead
of IBM-specific open coded search

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Nathan Lynch 2008-07-27 15:24:53 +10:00 • committed by Benjamin Herrenschmidt

parent 0764bf63da

commit 440a0857e3

3 changed files with 66 additions and 0 deletions

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64

arch/powerpc/kernel/smp.c

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1

include/asm-powerpc/smp.h

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1

include/asm-powerpc/topology.h

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