drivers/resctrl/mpam_devices.c

File Facts

System

Linux kernel

Corpus path

drivers/resctrl/mpam_devices.c

Extension

.c

Size

80477 bytes

Lines

2971

Domain

Driver Families

Bucket

drivers/resctrl

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/acpi.h
• linux/atomic.h
• linux/arm_mpam.h
• linux/bitfield.h
• linux/bitmap.h
• linux/cacheinfo.h
• linux/cpu.h
• linux/cpumask.h
• linux/device.h
• linux/errno.h
• linux/gfp.h
• linux/interrupt.h
• linux/irq.h
• linux/irqdesc.h
• linux/list.h
• linux/lockdep.h
• linux/mutex.h
• linux/platform_device.h
• linux/printk.h
• linux/srcu.h
• linux/spinlock.h
• linux/types.h
• linux/workqueue.h
• mpam_internal.h
• test_mpam_devices.c

Detected Declarations

• struct mon_read
• struct mpam_write_config_arg
• function init_garbage
• function mpam_free_garbage
• function llist_for_each_entry_safe
• function mpam_disable
• function __mpam_read_reg
• function _mpam_read_partsel_reg
• function __mpam_write_reg
• function _mpam_write_partsel_reg
• function _mpam_read_monsel_reg
• function _mpam_write_monsel_reg
• function mpam_msc_check_aidr
• function mpam_msc_read_idr
• function mpam_msc_clear_esr
• function mpam_msc_read_esr
• function __mpam_part_sel_raw
• function __mpam_part_sel
• function __mpam_intpart_sel
• function mpam_register_requestor
• function mpam_class_alloc
• function mpam_class_destroy
• function mpam_class_find
• function list_for_each_entry
• function mpam_component_alloc
• function mpam_component_destroy
• function mpam_component_find
• function list_for_each_entry
• function mpam_vmsc_alloc
• function mpam_vmsc_destroy
• function mpam_vmsc_find
• function list_for_each_entry
• function mpam_get_cpumask_from_cache_id
• function cpumask_of_node
• function for_each_possible_cpu
• function mpam_ris_get_affinity
• function mpam_ris_create_locked
• function mpam_ris_destroy
• function mpam_ris_create
• function list_for_each_entry
• function mpam_enable_quirk_nvidia_t241_1
• function mpam_enable_quirks
• function mpam_ris_hw_probe_csu_nrdy
• function mpam_ris_hw_probe
• function mpam_msc_hw_probe
• function mpam_ris_has_mbwu_long_counter
• function mpam_msc_read_mbwu_l
• function mpam_msc_zero_mbwu_l

Annotated Snippet

subsys_initcall(mpam_msc_driver_init);

#ifdef CONFIG_MPAM_KUNIT_TEST
#include "test_mpam_devices.c"
#endif

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/atomic.h`, `linux/arm_mpam.h`, `linux/bitfield.h`, `linux/bitmap.h`, `linux/cacheinfo.h`, `linux/cpu.h`, `linux/cpumask.h`.
• Detected declarations: `struct mon_read`, `struct mpam_write_config_arg`, `function init_garbage`, `function mpam_free_garbage`, `function llist_for_each_entry_safe`, `function mpam_disable`, `function __mpam_read_reg`, `function _mpam_read_partsel_reg`, `function __mpam_write_reg`, `function _mpam_write_partsel_reg`.
• Atlas domain: Driver Families / drivers/resctrl.
• 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.