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Add missing MODULE_DEVICE_TABLE definition to generate modalias, which
enables module autoloading.
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230615232630.304870-1-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
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The functional paths of the driver need not care about ACPI, so abstract
the property of atomic doubleword access as its own flag (repacking the
structure for a better fit). We also do not need to go poking directly
at the APMT for standard resources which the ACPI layer has already
dealt with, so deal with the optional MMIO page and interrupt in the
normal firmware-agnostic manner. The few remaining portions of probing
that *are* APMT-specific can still easily retrieve the APMT pointer as
needed without us having to carry a duplicate copy around everywhere.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-and-tested-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/88f97268603e1aa6016d178982a1dc2861f6770d.1685983270.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
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Build-wise, the ACPI dependency consists of only a couple of things
which could probably stand being factored out into ACPI helpers anyway.
However for the immediate concern of working towards Devicetree support
here, it's easy enough to make a few tweaks to contain the affected code
locally, such that we can relax the Kconfig dependency.
Reviewed-and-Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/9d126711c7498b199b3e6f5cf48ca60ffb9df54c.1685983270.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
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ARM_CSPMU_EVENT_ATTR() defines a struct perf_pmu_events_attr, so
arm_cspmu_sysfs_event_show() should not be interpreting it as struct
dev_ext_attribute.
Fixes: e37dfd65731d ("perf: arm_cspmu: Add support for ARM CoreSight PMU driver")
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-and-tested-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/27c0804af64007b2400abbc40278f642ee6a0a29.1685983270.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
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Don't try to set irq affinity if PMU doesn't have an overflow interrupt.
Fixes: e37dfd65731d ("perf: arm_cspmu: Add support for ARM CoreSight PMU driver")
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230608203742.3503486-1-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
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Fix warning message from smatch tool:
| smatch warnings:
| drivers/perf/arm_cspmu/arm_cspmu.c:1075 arm_cspmu_find_cpu_container()
| warn: variable dereferenced before check 'cpu_dev' (see line 1073)
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202302191227.kc0V8fM7-lkp@intel.com/
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230302205701.35323-1-bwicaksono@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
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Building an arm64 allmodconfig target results in the following failure
from modpost:
| ERROR: modpost: missing MODULE_LICENSE() in drivers/perf/arm_cspmu/arm_cspmu.o
| ERROR: modpost: missing MODULE_LICENSE() in drivers/perf/arm_cspmu/nvidia_cspmu.o
| make[1]: *** [scripts/Makefile.modpost:126: Module.symvers] Error 1
| make: *** [Makefile:1944: modpost] Error 2
Add the missing MODULE_LICENSE() macros, following the license of the
source files and symbol exports.
Signed-off-by: Will Deacon <will@kernel.org>
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Add support for NVIDIA System Cache Fabric (SCF) and Memory Control
Fabric (MCF) PMU attributes for CoreSight PMU implementation in
NVIDIA devices.
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Link: https://lore.kernel.org/r/20221111222330.48602-3-bwicaksono@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
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Add support for ARM CoreSight PMU driver framework and interfaces.
The driver provides generic implementation to operate uncore PMU based
on ARM CoreSight PMU architecture. The driver also provides interface
to get vendor/implementation specific information, for example event
attributes and formating.
The specification used in this implementation can be found below:
* ACPI Arm Performance Monitoring Unit table:
https://developer.arm.com/documentation/den0117/latest
* ARM Coresight PMU architecture:
https://developer.arm.com/documentation/ihi0091/latest
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Link: https://lore.kernel.org/r/20221111222330.48602-2-bwicaksono@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
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