arch/x86/events/amd/ibs.c

File Facts

System

Linux kernel

Corpus path

arch/x86/events/amd/ibs.c

Extension

.c

Size

51944 bytes

Lines

2020

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/perf_event.h
• linux/init.h
• linux/export.h
• linux/pci.h
• linux/ptrace.h
• linux/syscore_ops.h
• linux/sched/clock.h
• asm/apic.h
• asm/cpuid/api.h
• asm/msr.h
• ../perf_event.h
• linux/kprobes.h
• linux/hardirq.h
• asm/nmi.h
• asm/amd/ibs.h

Detected Declarations

• struct cpu_perf_ibs
• struct perf_ibs
• enum ibs_states
• function perf_event_set_period
• function perf_event_try_update
• function IbsOpCntCtl
• function forward_event_to_ibs
• function validate_group
• function for_each_sibling_event
• function perf_ibs_ldlat_event
• function perf_ibs_fetch_lat_event
• function perf_ibs_strmst_event
• function perf_ibs_init
• function perf_ibs_set_period
• function get_ibs_fetch_count
• function get_ibs_op_count
• function perf_ibs_event_update
• function perf_ibs_enable_event
• function perf_ibs_disable_event
• function perf_ibs_start
• function perf_ibs_stop
• function perf_ibs_add
• function perf_ibs_del
• function perf_ibs_read
• function zen4_ibs_extensions_is_visible
• function ibs_fetch_lat_is_visible
• function ibs_op_strmst_is_visible
• function ibs_op_rmtsocket_is_visible
• function ibs_op_ldlat_is_visible
• function ibs_op_dtlb_pgsize_is_visible
• function cnt_ctl_is_visible
• function perf_ibs_get_mem_op
• function perf_ibs_data_src
• function perf_ibs_get_mem_lvl
• function perf_ibs_cache_hit_st_valid
• function perf_ibs_get_mem_snoop
• function perf_ibs_get_tlb_lvl
• function perf_ibs_get_mem_lock
• function perf_ibs_get_data_src
• function perf_ibs_get_op_data2
• function perf_ibs_parse_ld_st_data
• function perf_ibs_is_mem_sample_type
• function perf_ibs_get_offset_max
• function perf_ibs_is_kernel_data_addr
• function perf_ibs_is_kernel_br_target
• function perf_ibs_discard_sample
• function perf_ibs_phyaddr_clear
• function perf_ibs_handle_irq

Annotated Snippet

device_initcall(amd_ibs_init);

Annotation

• Immediate include surface: `linux/perf_event.h`, `linux/init.h`, `linux/export.h`, `linux/pci.h`, `linux/ptrace.h`, `linux/syscore_ops.h`, `linux/sched/clock.h`, `asm/apic.h`.
• Detected declarations: `struct cpu_perf_ibs`, `struct perf_ibs`, `enum ibs_states`, `function perf_event_set_period`, `function perf_event_try_update`, `function IbsOpCntCtl`, `function forward_event_to_ibs`, `function validate_group`, `function for_each_sibling_event`, `function perf_ibs_ldlat_event`.
• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: integration implementation candidate.

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.