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

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Date:	Mon, 11 Jul 2016 15:47:06 +0100
From:	Will Deacon <will.deacon@....com>
To:	Rob Herring <robh@...nel.org>
Cc:	Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	Heiko Stuebner <heiko@...ech.de>, cf@...k-chips.com,
	huangtao@...k-chips.com, jay.xu@...k-chips.com,
	Caesar Wang <wxt@...k-chips.com>,
	David Wu <david.wu@...k-chips.com>,
	Brian Norris <briannorris@...omium.org>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v2] drivers/perf: arm-pmu: Handle per-interrupt affinity
 mask

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@....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