arch/x86/events/amd/iommu.h

File Facts

System

Linux kernel

Corpus path

arch/x86/events/amd/iommu.h

Extension

.h

Size

703 bytes

Lines

25

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: implementation source

Status

source 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.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _PERF_EVENT_AMD_IOMMU_H_
#define _PERF_EVENT_AMD_IOMMU_H_

/* iommu pc mmio region register indexes */
#define IOMMU_PC_COUNTER_REG			0x00
#define IOMMU_PC_COUNTER_SRC_REG		0x08
#define IOMMU_PC_PASID_MATCH_REG		0x10
#define IOMMU_PC_DOMID_MATCH_REG		0x18
#define IOMMU_PC_DEVID_MATCH_REG		0x20
#define IOMMU_PC_COUNTER_REPORT_REG		0x28

/* maximum specified bank/counters */
#define PC_MAX_SPEC_BNKS			64
#define PC_MAX_SPEC_CNTRS			16

#endif /*_PERF_EVENT_AMD_IOMMU_H_*/

Annotation

• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: source 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.