arch/powerpc/include/uapi/asm/papr-hvpipe.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/uapi/asm/papr-hvpipe.h

Extension

.h

Size

816 bytes

Lines

34

Domain

Architecture Layer

Bucket

arch/powerpc

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
• asm/ioctl.h
• asm/papr-miscdev.h

Detected Declarations

• struct papr_hvpipe_hdr

Annotated Snippet

struct papr_hvpipe_hdr {
	__u8 version;
	__u8 reserved[3];
	__u32 flags;
	__u8 reserved2[40];
};

/*
 * ioctl for /dev/papr-hvpipe
 */
#define PAPR_HVPIPE_IOC_CREATE_HANDLE	_IOW(PAPR_MISCDEV_IOC_ID, 9, __u32)

/*
 * hvpipe_hdr flags used for read()
 */
#define HVPIPE_MSG_AVAILABLE	0x01 /* Payload is available */
#define HVPIPE_LOST_CONNECTION	0x02 /* Pipe connection is closed/unavailable */

#endif /* _UAPI_PAPR_HVPIPE_H_ */

Annotation

• Immediate include surface: `linux/types.h`, `asm/ioctl.h`, `asm/papr-miscdev.h`.
• Detected declarations: `struct papr_hvpipe_hdr`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.