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Re: [PATCH v2] drivers/perf: arm-pmu: Handle per-interrupt affinity mask

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  Re: [PATCH v2] drivers/perf: arm-pmu: Handle per-interrupt affinity  mask Rob Herring <robh@kernel.org> - 2016-07-11 16:40 +0200
    Re: [PATCH v2] drivers/perf: arm-pmu: Handle per-interrupt affinity  mask Will Deacon <will.deacon@arm.com> - 2016-07-11 16:50 +0200

#1440661 — Re: [PATCH v2] drivers/perf: arm-pmu: Handle per-interrupt affinity mask

On Wed, Jul 06, 2016 at 03:33:47PM +0100, Marc Zyngier wrote:
> On a big-little system, PMUs can be wired to CPUs using per CPU
> interrups (PPI). In this case, it is important to make sure that
> the enable/disable do happen on the right set of CPUs.
> 
> So instead of relying on the interrupt-affinity property, we can
> use the actual percpu affinity that DT exposes as part of the
> interrupt specifier. The DT binding is also updated to reflect
> the fact that the interrupt-affinity property shouldn't be used
> in that case.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
> * From v1:
>   - propagate the error if irq_get_percpu_devid_partition fails
> 
>  Documentation/devicetree/bindings/arm/pmu.txt |  4 +++-

I acked v1, please add acks.

Rob

>  drivers/perf/arm_pmu.c                        | 27 ++++++++++++++++++++++-----
>  2 files changed, 25 insertions(+), 6 deletions(-)

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#1440686

On Mon, Jul 11, 2016 at 09:37:16AM -0500, Rob Herring wrote:
> On Wed, Jul 06, 2016 at 03:33:47PM +0100, Marc Zyngier wrote:
> > On a big-little system, PMUs can be wired to CPUs using per CPU
> > interrups (PPI). In this case, it is important to make sure that
> > the enable/disable do happen on the right set of CPUs.
> > 
> > So instead of relying on the interrupt-affinity property, we can
> > use the actual percpu affinity that DT exposes as part of the
> > interrupt specifier. The DT binding is also updated to reflect
> > the fact that the interrupt-affinity property shouldn't be used
> > in that case.
> > 
> > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> > ---
> > * From v1:
> >   - propagate the error if irq_get_percpu_devid_partition fails
> > 
> >  Documentation/devicetree/bindings/arm/pmu.txt |  4 +++-
> 
> I acked v1, please add acks.

This is queued in arm64/for-next/core, but I spotted your Ack and added
it when I sent the patch to Catalin.

Will

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