powerpc/smp: Rework CPU topology construction

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The CPU scheduler topology is constructed from a number of per-cpu
cpumasks which describe which sets of logical CPUs are related in some
fashion. Current code that handles constructing these masks when CPUs
are hot(un)plugged can be simplified a bit by exploiting the fact that
the scheduler requires higher levels of the toplogy (e.g package level
groupings) to be supersets of the lower levels (e.g.  threas in a core).
This patch reworks the cpumask construction to be simpler and easier to
extend with extra topology levels.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
[mpe: Fix CONFIG_HOTPLUG_CPU=n build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Oliver O'Halloran 2017-06-29 17:12:54 +10:00 • committed by Michael Ellerman

parent e3d8b67e2c

commit df52f67140

1 changed files with 86 additions and 66 deletions

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arch/powerpc/kernel/smp.c

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