linux-kernel - RE: [PATCH v3 2/4] perf: imx_perf: add support for i.MX95 platform

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Date: Tue, 30 Jan 2024 02:46:24 +0000
From: Xu Yang <xu.yang_2@....com>
To: Frank Li <frank.li@....com>, "will@...nel.org" <will@...nel.org>,
	"mark.rutland@....com" <mark.rutland@....com>, "robh+dt@...nel.org"
	<robh+dt@...nel.org>, "krzysztof.kozlowski+dt@...aro.org"
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CC: dl-linux-imx <linux-imx@....com>, "mike.leach@...aro.org"
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Subject: RE: [PATCH v3 2/4] perf: imx_perf: add support for i.MX95 platform


> > Subject: [PATCH v3 2/4] perf: imx_perf: add support for i.MX95 platform
> >
> > i.MX95 has a DDR PMU which is almostly same as i.MX93, it now supports
> > read beat and write beat filter capabilities. This will add support for
> > i.MX95 and enhance the driver to support specific filter handling for it.
> >
> > Usage:
> >
> > For read beat:
> > ~# perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_rd_beat_filt2,counter=3,axi_mask=ID_MASK,axi_id
> > =ID/
> > ~# perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_rd_beat_filt1,counter=4,axi_mask=ID_MASK,axi_id
> > =ID/
> > ~# perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_rd_beat_filt0,counter=5,axi_mask=ID_MASK,axi_id
> > =ID/
> > eg: For edma2: perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_rd_beat_filt0,counter=5,axi_mask=0x00f,axi_id=0x0
> > 0c/
> >
> > For write beat:
> > ~# perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_wr_beat_filt,counter=2,axi_mask=ID_MASK,axi_id=
> > ID/
> > eg: For edma2: perf stat -a -I 1000 -e
> > imx9_ddr0/eddrtq_pm_wr_beat_filt,counter=2,axi_mask=0x00f,axi_id=0x00
> > c/
> >
> > Signed-off-by: Xu Yang <xu.yang_2@....com>
> >
> > ---
> > Changes in v2:
> >  - put soc spefific axi filter events to drvdata according
> >    to franks suggestions.
> >  - adjust pmcfg axi_id and axi_mask config
> > Changes in v3:
> >  - no changes
> > ---
> >  drivers/perf/fsl_imx9_ddr_perf.c | 203 +++++++++++++++++++++++++-----
> 
> I suggest you split this two patch.
> 1st patch rework imx93 only, which prepare for add imx95. All function is equal.
> 2nd patch add imx95.

Okay, I'll do that in next vesion.

Thanks,
Xu Yang