From: Yicong Yang <yangyicong@xxxxxxxxxxxxx> This series tends to improve the PTT's filter interface in 2 aspects (Patch 2&3): - Support dynamically filter updating to response to hotplug Previous the supported filter list is settled down once the driver probed and it maybe out-of-date if hotplug events happen later. User need to reload the driver to update list. Patch 1/2 enable the driver to update the list by registering a PCI bus notifier and the filter list will always be the latest. - Export the available filters through sysfs Previous user needs to calculate the filters and filter value using device's BDF number, which requires the user to know the hardware well. Patch 3/3 tends to export the available filter information through sysfs attributes, the filter value will be gotten by reading the file. This will be more user friendly. In order to support above function, this series also includes a patch 1/4 to factor out the allocation and release function of PTT filters. Also includes an improvement and a fixs. Patch 4 tends to set proper PMU capability to avoid collecting unnecessary data to save the storage. Patch 5 fix an improper use of pci_irq_vector() which have potential problem. Change since v3: - Addressed the comment from Jonathan. Add tags for Patch 1 and 4. Thanks. - Add one bugfix in Patch 5/5 Link: https://lore.kernel.org/linux-pci/20230523093228.48149-1-yangyicong@xxxxxxxxxx/ Change since v2: - Fix one possible issue for dereferencing a NULL pointer Link: https://lore.kernel.org/linux-pci/20230331070310.5465-1-yangyicong@xxxxxxxxxx/ Change since v1: - Drop the patch for handling the cpumask since it seems to be redundant - Refine of the codes per Jonathan - Add Patch 1/4 for refactor the filters allocation and release - Thanks the review of Jonathan. Link: https://lore.kernel.org/linux-pci/d496ee4f-641a-a726-ab3f-62b587422b61@xxxxxxxxxx/T/#m47e4de552d69920035214b3e91080cdc185f61f5 Yicong Yang (5): hwtracing: hisi_ptt: Factor out filter allocation and release operation hwtracing: hisi_ptt: Add support for dynamically updating the filter list hwtracing: hisi_ptt: Export available filters through sysfs hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU hwtracing: hisi_ptt: Fix potential sleep in atomic context .../ABI/testing/sysfs-devices-hisi_ptt | 50 ++ Documentation/trace/hisi-ptt.rst | 12 +- drivers/hwtracing/ptt/hisi_ptt.c | 442 ++++++++++++++++-- drivers/hwtracing/ptt/hisi_ptt.h | 56 +++ 4 files changed, 522 insertions(+), 38 deletions(-) -- 2.24.0
