linux-kernel - Re: [PATCH 5/5] nds32: Add document for NDS32 PMU.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 22 Oct 2018 18:23:08 +0800
From:   Nick Hu <nickhu@...estech.com>
To:     Mark Rutland <mark.rutland@....com>
CC:     Greentime Ying-Han Hu(胡英漢) 
        <greentime@...estech.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "deanbo422@...il.com" <deanbo422@...il.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "acme@...nel.org" <acme@...nel.org>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "jolsa@...hat.com" <jolsa@...hat.com>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "sboyd@...eaurora.org" <sboyd@...eaurora.org>,
        "geert@...ux-m68k.org" <geert@...ux-m68k.org>,
        Zong Zong-Xian Li(李宗憲) 
        <zong@...estech.com>,
        "ebiederm@...ssion.com" <ebiederm@...ssion.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "pombredanne@...b.com" <pombredanne@...b.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "green.hu@...il.com" <green.hu@...il.com>
Subject: Re: [PATCH 5/5] nds32: Add document for NDS32 PMU.

Hi Mark,

On Thu, Oct 18, 2018 at 10:31:32PM +0800, Mark Rutland wrote:
> On Thu, Oct 18, 2018 at 04:43:17PM +0800, Nickhu wrote:
> > The document for how to add NDS32 PMU
> > in devicetree.
> > 
> > Signed-off-by: Nickhu <nickhu@...estech.com>
> > ---
> >  Documentation/devicetree/bindings/nds32/pmu.txt | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/nds32/pmu.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/nds32/pmu.txt b/Documentation/devicetree/bindings/nds32/pmu.txt
> > new file mode 100644
> > index 000000000000..02762b850e59
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/nds32/pmu.txt
> > @@ -0,0 +1,17 @@
> > +* NDS32 Performance Monitor Units
> > +
> > +NDS32 core have a PMU for counting cpu and cache events like cache misses.
> > +The NDS32 PMU representation in the device tree should be done as under:
> > +
> > +Required properties:
> > +
> > +- compatilbe :
> > +	"andestech,atcpmu"
> 
> Which CPUs have this PMU?
> 
> I expected more specific strings, e.g. "andestech,n13-pmu" and/or
> "andestech,andestech,nds32v3-pmu".
>
In nds32 V3, all of our CPU have PMU.
So I will change the string to andestech,nds32v3-pmu.

> > +
> > +- interrupts : The interrupt number for NDS32 PMU is 13.
> > +
> > +Example:
> > +pmu{
> > +	compatible = "andestech,atcpmu";
> > +	interrupts = <13>;
> > +}
> 
> The driver tried to find multiple interrupts. Is there only a single
> interrupt in all cases?
> 
There is only overflow interrupt for performance couner in nds32 V3.
I will modified the driver and prepare another patch.
Thanks!

> Thanks,
> Mark.

Thank you for replying the patch set so quickly.
I will prepare the next patch set for it.
Thanks,
Nick