tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_PAPR_HVPIPE_H_
3#define _UAPI_PAPR_HVPIPE_H_
4
5#include <linux/types.h>
6#include <asm/ioctl.h>
7#include <asm/papr-miscdev.h>
8
9/*
10 * This header is included in payload between OS and the user
11 * space.
12 * flags: OS notifies the user space whether the hvpipe is
13 * closed or the buffer has the payload.
14 */
15struct papr_hvpipe_hdr {
16 __u8 version;
17 __u8 reserved[3];
18 __u32 flags;
19 __u8 reserved2[40];
20};
21
22/*
23 * ioctl for /dev/papr-hvpipe
24 */
25#define PAPR_HVPIPE_IOC_CREATE_HANDLE _IOW(PAPR_MISCDEV_IOC_ID, 9, __u32)
26
27/*
28 * hvpipe_hdr flags used for read()
29 */
30#define HVPIPE_MSG_AVAILABLE 0x01 /* Payload is available */
31#define HVPIPE_LOST_CONNECTION 0x02 /* Pipe connection is closed/unavailable */
32
33#endif /* _UAPI_PAPR_HVPIPE_H_ */