hwtracing: hisi_ptt: Add support for dynamically updating the filter list

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The PCIe devices supported by the PTT trace can be removed/rescanned by
hotplug or through sysfs.  Add support for dynamically updating the
available filter list by registering a PCI bus notifier block. Then user
can always get latest information about available tracing filters and
driver can block the invalid filters of which related devices no longer
exist in the system.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230621092804.15120-3-yangyicong@huawei.com

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Yicong Yang 2023-06-21 17:28:01 +08:00 • committed by Suzuki K Poulose

parent a3ecaba701

commit 556ef09392

3 changed files with 205 additions and 11 deletions

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6

Documentation/trace/hisi-ptt.rst

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170

drivers/hwtracing/ptt/hisi_ptt.c

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40

drivers/hwtracing/ptt/hisi_ptt.h

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