arch/s390/include/asm/perf_event.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/perf_event.h

Extension

.h

Size

1978 bytes

Lines

59

Domain

Architecture Layer

Bucket

arch/s390

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/perf_event.h
• linux/device.h
• asm/stacktrace.h

Detected Declarations

• struct pt_regs
• struct perf_sf_sde_regs

Annotated Snippet

struct perf_sf_sde_regs {
	unsigned char in_guest:1;	  /* guest sample */
	unsigned long reserved:63;	  /* reserved */
};

#define perf_arch_fetch_caller_regs(regs, __ip) do {			\
	(regs)->psw.mask = 0;						\
	(regs)->psw.addr = (__ip);					\
	(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -	\
		offsetof(struct stack_frame, back_chain);		\
} while (0)

#endif /* _ASM_S390_PERF_EVENT_H */

Annotation

• Immediate include surface: `linux/perf_event.h`, `linux/device.h`, `asm/stacktrace.h`.
• Detected declarations: `struct pt_regs`, `struct perf_sf_sde_regs`.
• Atlas domain: Architecture Layer / arch/s390.
• 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.