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| author | Kan Liang <kan.liang@linux.intel.com> | 2020-09-14 17:34:19 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-09-24 16:55:51 +0300 |
| commit | 95a7fc77443328ac8b68378df8e137a044ece5e8 (patch) | |
| tree | ccf2f079011ea5a69051144a0aeda3f64f65a754 /arch/x86/events/intel/uncore.h | |
| parent | cdcce92a3a03bccbb0b4a0342fc7e279fc507bc3 (diff) | |
| download | linux-95a7fc77443328ac8b68378df8e137a044ece5e8.tar.xz | |
perf/x86/intel/uncore: Generic support for the PCI sub driver
Some uncore counters may be located in the configuration space of a PCI
device, which already has a bonded driver. Currently, the uncore driver
cannot register a PCI uncore PMU for these counters, because, to
register a PCI uncore PMU, the uncore driver must be bond to the device.
However, one device can only have one bonded driver.
Add an uncore PCI sub driver to support such kind of devices.
The sub driver doesn't own the device. In initialization, the sub
driver searches the device via pci_get_device(), and register the
corresponding PMU for the device. In the meantime, the sub driver
registers a PCI bus notifier, which is used to notify the sub driver
once the device is removed. The sub driver can unregister the PMU
accordingly.
The sub driver only searches the devices defined in its id table. The
id table varies on different platforms, which will be implemented in the
following platform-specific patch.
Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1600094060-82746-6-git-send-email-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/events/intel/uncore.h')
| -rw-r--r-- | arch/x86/events/intel/uncore.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h index 105fdc69825e..df544bc377ee 100644 --- a/arch/x86/events/intel/uncore.h +++ b/arch/x86/events/intel/uncore.h @@ -552,6 +552,7 @@ extern struct intel_uncore_type **uncore_msr_uncores; extern struct intel_uncore_type **uncore_pci_uncores; extern struct intel_uncore_type **uncore_mmio_uncores; extern struct pci_driver *uncore_pci_driver; +extern struct pci_driver *uncore_pci_sub_driver; extern raw_spinlock_t pci2phy_map_lock; extern struct list_head pci2phy_map_head; extern struct pci_extra_dev *uncore_extra_pci_dev; |