kernel/drivers/perf/arm_pmu_platform.c, branch linux-6.9.y

drivers/perf: Explicitly include correct DT includes

2023-07-27T12:02:23Z

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

2022-09-01T11:01:40Z

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

2021-03-30T10:41:50Z

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

2021-03-30T10:41:50Z

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

2021-03-30T10:41:50Z

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

2018-10-01T10:33:17Z

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

drivers/perf: Initialise return value in armpmu_request_irqs()

2018-07-04T10:50:50Z

If a PMU doesn't have any IRQs, we should return 0 from armpmu_request_irqs(), rather than uninitialised stack. Signed-off-by: Will Deacon

drivers/perf: arm_pmu_platform: do not warn about affinity on uniprocessor

2018-03-27T12:13:27Z

If there is exactly one CPU present, there is no ambiguity: do not warn that PMU setup would need to guess IRQ affinity. Cc: Mark Rutland Cc: Will Deacon Signed-off-by: Alexander Monakov Signed-off-by: Will Deacon

arm_pmu: acpi: request IRQs up-front

2018-02-20T11:34:54Z

We can't request IRQs in atomic context, so for ACPI systems we'll have to request them up-front, and later associate them with CPUs. This patch reorganises the arm_pmu code to do so. As we no longer have the arm_pmu structure at probe time, a number of prototypes need to be adjusted, requiring changes to the common arm_pmu code and arm_pmu platform code. Signed-off-by: Mark Rutland Cc: Will Deacon Signed-off-by: Will Deacon

arm_pmu: acpi: check for mismatched PPIs

2018-02-20T11:34:54Z

The arm_pmu platform code explicitly checks for mismatched PPIs at probe time, while the ACPI code leaves this to the core code. Future refactoring will make this difficult for the core code to check, so let's have the ACPI code check this explicitly. As before, upon a failure we'll continue on without an interrupt. Ho hum. Signed-off-by: Mark Rutland Cc: Will Deacon Signed-off-by: Will Deacon