kernel/linux.git/drivers/perf/arm_pmu_platform.c, branch v6.19.11

perf: arm_pmu: Request specific affinities for per CPU NMIs/interrupts

2025-10-27T16:16:35+00:00

Let the PMU driver request both NMIs and normal interrupts with an affinity mask matching the PMU affinity. Signed-off-by: Will Deacon Signed-off-by: Marc Zyngier Signed-off-by: Thomas Gleixner Tested-by: Will Deacon Link: https://patch.msgid.link/20251020122944.3074811-19-maz@kernel.org

perf: arm_pmu: Convert to the new interrupt affinity retrieval API

2025-10-27T16:16:33+00:00

Now that the relevant interrupt controllers are equipped with a callback returning the affinity of per-CPU interrupts, switch the OF side of the ARM PMU driver over to this new method. Signed-off-by: Marc Zyngier Signed-off-by: Thomas Gleixner Tested-by: Will Deacon Reviewed-by: Jinjie Ruan Link: https://patch.msgid.link/20251020122944.3074811-9-maz@kernel.org

perf: arm_pmu: Use of_property_present()

2024-08-16T12:08:21+00:00

Use of_property_present() to test for property presence rather than of_find_property(). This is part of a larger effort to remove callers of of_find_property() and similar functions. of_find_property() leaks the DT struct property and data pointers which is a problem for dynamically allocated nodes which may be freed. Signed-off-by: Rob Herring (Arm) Acked-by: Mark Rutland Reviewed-by: Anshuman Khandual Link: https://lore.kernel.org/r/20240731191312.1710417-15-robh@kernel.org Signed-off-by: Will Deacon

perf/arm_pmu: Assign parents for event_source devices

2024-04-19T14:59:30+00:00

Currently the PMU device appears directly under /sys/devices/ Only root busses should appear there, so instead assign the pmu->dev parent to be the platform device. Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/ Signed-off-by: Jonathan Cameron Reviewed-by: Suzuki K Poulose Link: https://lore.kernel.org/r/20240412161057.14099-17-Jonathan.Cameron@huawei.com Signed-off-by: Will Deacon

drivers/perf: Explicitly include correct DT includes

2023-07-27T12:02:23+00:00

The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20230714174832.4061752-1-robh@kernel.org Signed-off-by: Will Deacon

perf/arm_pmu_platform: fix tests for platform_get_irq() failure

2022-09-01T11:01:40+00:00

The platform_get_irq() returns negative error codes. It can't actually return zero. Signed-off-by: Yu Zhe Link: https://lore.kernel.org/r/20220825011844.8536-1-yuzhe@nfschina.com Signed-off-by: Will Deacon

perf/arm_pmu_platform: Clean up with dev_printk

2021-03-30T10:41:50+00:00

Nearly all of the messages we can log from the platform device code relate to the specific PMU device and the properties we're parsing from its DT node. In some cases we use %pOF to point at where something was wrong, but even that is inconsistent. Let's convert these logs to the appropriate dev_printk variants, so that every issue specific to the device and/or its DT description is clearly and instantly attributable, particularly if there is more than one PMU node present in the DT. The local refactoring in a couple of functions invites some extra cleanup in the process - the init_fn matching can be streamlined, and the PMU registration failure message moved to the appropriate place and log level. CC: Tian Tao Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/10a4aacdf071d0c03d061c408a5899e5b32cc0a6.1616774562.git.robin.murphy@arm.com Signed-off-by: Will Deacon

perf/arm_pmu_platform: Fix error handling

2021-03-30T10:41:50+00:00

If we're aborting after failing to register the PMU device, we probably don't want to leak the IRQs that we've claimed. Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/53031a607fc8412a60024bfb3bb8cd7141f998f5.1616774562.git.robin.murphy@arm.com Signed-off-by: Will Deacon

perf/arm_pmu_platform: Use dev_err_probe() for IRQ errors

2021-03-30T10:41:50+00:00

By virtue of using platform_irq_get_optional() under the covers, platform_irq_count() needs the target interrupt controller to be available and may return -EPROBE_DEFER if it isn't. Let's use dev_err_probe() to avoid a spurious error log (and help debug any deferral issues) in that case. Reported-by: Paul Menzel Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/073d5e0d3ed1f040592cb47ca6fe3759f40cc7d1.1616774562.git.robin.murphy@arm.com Signed-off-by: Will Deacon

perf: Convert to using %pOFn instead of device_node.name

2018-10-01T10:33:17+00:00

In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Acked-by: Will Deacon Signed-off-by: Rob Herring Signed-off-by: Catalin Marinas