arch/s390/include/asm/tpi.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/tpi.h

Extension

.h

Size

738 bytes

Lines

38

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/types.h
• uapi/asm/schid.h

Detected Declarations

• struct tpi_info
• struct tpi_adapter_info

Annotated Snippet

struct tpi_info {
	struct subchannel_id schid;
	u32 intparm;
	u32 adapter_IO:1;
	u32 directed_irq:1;
	u32 isc:3;
	u32 :12;
	u32 type:3;
	u32 :12;
} __packed __aligned(4);

/* I/O-Interruption Code as stored by TPI for an Adapter I/O */
struct tpi_adapter_info {
	u32 aism:8;
	u32 :22;
	u32 error:1;
	u32 forward:1;
	u32 reserved;
	u32 adapter_IO:1;
	u32 directed_irq:1;
	u32 isc:3;
	u32 :27;
} __packed __aligned(4);

#endif /* __ASSEMBLER__ */

#endif /* _ASM_S390_TPI_H */

Annotation

• Immediate include surface: `linux/types.h`, `uapi/asm/schid.h`.
• Detected declarations: `struct tpi_info`, `struct tpi_adapter_info`.
• 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.