linux-kernel - Re: [PATCH v8 1/3] perf: cavium: Support memory controller PMU counters

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Message-ID: <20170727090856.GB15784@hc>
Date:   Thu, 27 Jul 2017 11:08:56 +0200
From:   Jan Glauber <jan.glauber@...iumnetworks.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     David Daney <ddaney.cavm@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Suzuki K Poulose <Suzuki.Poulose@....com>,
        linux-pci@...r.kernel.org, Will Deacon <will.deacon@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v8 1/3] perf: cavium: Support memory controller PMU
 counters

On Thu, Jul 27, 2017 at 07:11:57AM +0200, Borislav Petkov wrote:
> On Wed, Jul 26, 2017 at 02:02:42PM -0700, David Daney wrote:
> > Also, if a given configuration disables CONFIG_EDAC there is some hackery
> > needed to get the perf portion of the driver included.
> 
> Yes, and we don't do performance counters in EDAC.
> 
> So you could add a small memory controller driver which does the
> arbitration or fix the firmware.

OK. As fixing the firmware will take quite some time I'll go for the memory
controller driver that starts EDAC / PMU depending on their CONFIG_.

What would be the proper location for the multiplexer?
drivers/soc/cavium or drivers/misc?

--Jan