linux-kernel - Re: [PATCH 1/2] drivers/perf: hisi: Add driver for HiSilicon PCIe PMU

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Date:   Wed, 7 Apr 2021 21:40:05 +0100
From:   Will Deacon <will@...nel.org>
To:     Qi Liu <liuqi115@...wei.com>
Cc:     mark.rutland@....com, zhangshaokun@...ilicon.com,
        linuxarm@...wei.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drivers/perf: hisi: Add driver for HiSilicon PCIe PMU

On Wed, Apr 07, 2021 at 05:49:02PM +0800, Qi Liu wrote:
> PCIe PMU Root Complex Integrated End Point(RCiEP) device is supported
> to sample bandwidth, latency, buffer occupation etc.
> 
> Each PMU RCiEP device monitors multiple root ports, and each RCiEP is
> registered as a pmu in /sys/bus/event_source/devices, so users can
> select target PMU, and use filter to do further sets.
> 
> Filtering options contains:
> event        - select the event.
> subevent     - select the subevent.
> port         - select target root ports. Information of root ports
>                are shown under sysfs.
> bdf           - select requester_id of target EP device.
> trig_len     - set trigger condition for starting event statistics.
> trigger_mode - set trigger mode. 0 means starting to statistic when
>                bigger than trigger condition, and 1 means smaller.
> thr_len      - set threshold for statistics.
> thr_mode     - set threshold mode. 0 means count when bigger than
>                threshold, and 1 means smaller.
> 
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Do you have a link to this review, please?

Will