drivers/perf/arm_spe_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/arm_spe_pmu.c

Extension

.c

Size

41252 bytes

Lines

1460

Domain

Driver Families

Bucket

drivers/perf

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bitfield.h
• linux/bitops.h
• linux/bug.h
• linux/capability.h
• linux/cpuhotplug.h
• linux/cpumask.h
• linux/device.h
• linux/errno.h
• linux/interrupt.h
• linux/irq.h
• linux/kernel.h
• linux/list.h
• linux/module.h
• linux/of.h
• linux/perf_event.h
• linux/perf/arm_pmu.h
• linux/platform_device.h
• linux/printk.h
• linux/slab.h
• linux/smp.h
• linux/vmalloc.h
• asm/barrier.h
• asm/cpufeature.h
• asm/mmu.h
• asm/sysreg.h

Detected Declarations

• struct arm_spe_pmu_buf
• struct arm_spe_pmu
• enum arm_spe_pmu_buf_fault_action
• enum arm_spe_pmu_capabilities
• function set_spe_event_has_cx
• function get_spe_event_has_cx
• function arm_spe_pmu_cap_get
• function arm_spe_pmu_cap_show
• function arm_spe_pmu_cap_show_hex
• function arm_spe_pmu_format_attr_is_visible
• function cpumask_show
• function arm_spe_event_to_pmscr
• function arm_spe_event_sanitise_period
• function arm_spe_event_to_pmsirr
• function arm_spe_event_to_pmsfcr
• function arm_spe_event_to_pmsevfr
• function arm_spe_event_to_pmsnevfr
• function arm_spe_event_to_pmslatfr
• function arm_spe_event_to_pmsdsfr
• function arm_spe_pmu_pad_buf
• function arm_spe_pmu_next_snapshot_off
• function __arm_spe_pmu_next_off
• function arm_spe_pmu_next_off
• function arm_spe_perf_aux_output_begin
• function arm_spe_perf_aux_output_end
• function arm_spe_pmu_disable_and_drain_local
• function arm_spe_pmu_buf_get_fault_act
• function arm_spe_pmu_irq_handler
• function fault
• function arm_spe_pmu_event_init
• function arm_spe_pmu_start
• function arm_spe_pmu_stop
• function arm_spe_pmu_add
• function arm_spe_pmu_del
• function arm_spe_pmu_read
• function arm_spe_pmu_free_aux
• function arm_spe_pmu_perf_init
• function arm_spe_pmu_perf_destroy
• function __arm_spe_pmu_dev_probe
• function __arm_spe_pmu_reset_local
• function __arm_spe_pmu_setup_one
• function __arm_spe_pmu_stop_one
• function arm_spe_pmu_cpu_startup
• function arm_spe_pmu_cpu_teardown
• function arm_spe_pmu_dev_init
• function arm_spe_pmu_dev_teardown
• function arm_spe_pmu_irq_probe
• function arm_spe_pmu_device_probe

Annotated Snippet

module_init(arm_spe_pmu_init);
module_exit(arm_spe_pmu_exit);

MODULE_DESCRIPTION("Perf driver for the ARMv8.2 Statistical Profiling Extension");
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/bitops.h`, `linux/bug.h`, `linux/capability.h`, `linux/cpuhotplug.h`, `linux/cpumask.h`, `linux/device.h`, `linux/errno.h`.
• Detected declarations: `struct arm_spe_pmu_buf`, `struct arm_spe_pmu`, `enum arm_spe_pmu_buf_fault_action`, `enum arm_spe_pmu_capabilities`, `function set_spe_event_has_cx`, `function get_spe_event_has_cx`, `function arm_spe_pmu_cap_get`, `function arm_spe_pmu_cap_show`, `function arm_spe_pmu_cap_show_hex`, `function arm_spe_pmu_format_attr_is_visible`.
• Atlas domain: Driver Families / drivers/perf.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.