linux-kernel - Re: [PATCH v4 2/2] drivers/perf: hisi: Add driver for HiSilicon PCIe PMU

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Date:   Wed, 19 May 2021 12:40:49 +0100
From:   John Garry <john.garry@...wei.com>
To:     Qi Liu <liuqi115@...wei.com>, <will@...nel.org>,
        <mark.rutland@....com>, <bhelgaas@...gle.com>
CC:     <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
        <zhangshaokun@...ilicon.com>
Subject: Re: [PATCH v4 2/2] drivers/perf: hisi: Add driver for HiSilicon PCIe
 PMU

On 19/05/2021 10:49, 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: John Garry <john.garry@...wei.com>
> Signed-off-by: Qi Liu <liuqi115@...wei.com>

JFYI, In light of this following series:
https://lore.kernel.org/linux-arm-kernel/87v97fccq9.ffs@nanos.tec.linutronix.de/

At some stage the irq_set_affinity_hint() calls need to be fixed up here 
as well.

Thanks,
John