linux-imx

perf vendor events: add JSON metrics for imx8 DDR Perf

Add JSON metrics for i.MX8 DDR perf.

Below command used for metric:
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root@imx8qmmek:~# perf list metricgroup

List of pre-defined events (to be used in -e):

Metric Groups:

i.MX8MM_DDR_MON
i.MX8MP_DDR_MON
i.MX8QM_DDR_MON
--------------------------------------------------------------
root@imx8qmmek:~# perf list metric

List of pre-defined events (to be used in -e):

Metrics:

  imx8mm-ddr0-2d-r
       [imx8mm: bursts of gpu 2d read from ddr0]
  imx8mm-ddr0-2d-w
       [imx8mm: bursts of gpu 2d write to ddr0]
  imx8mm-ddr0-3d-r
       [imx8mm: bursts of gpu 3d read from ddr0]
  imx8mm-ddr0-3d-w
       [imx8mm: bursts of gpu 3d write to ddr0]
  imx8mm-ddr0-a53-r
       [imx8mm: bursts of a53 core read from ddr0]
  imx8mm-ddr0-a53-w
       [imx8mm: bursts of a53 core write to ddr0]
  imx8mm-ddr0-all-r
       [imx8mm: bytes of all masters read from ddr0]
  imx8mm-ddr0-all-w
       [imx8mm: bytes of all masters write to ddr0]
------------------------------------------------------------
root@imx8qmmek:~# perf stat -a -M imx8mm-ddr0-2d-r sleep 1

  Performance counter stats for 'system wide':

                 0      imx8_ddr0/axid-read,axi_mask=0x0001,axi_id=0x0004/ #      0.0 imx8mm-ddr0-2d-r

       1.012773375 seconds time elapsed

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>