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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Copyright IBM Corp. 2022
4 * Author(s): Steffen Eiden <seiden@linux.ibm.com>
5 */
6#ifndef __S390_ASM_UVDEVICE_H
7#define __S390_ASM_UVDEVICE_H
8
9#include <linux/types.h>
10
11struct uvio_ioctl_cb {
12 __u32 flags;
13 __u16 uv_rc; /* UV header rc value */
14 __u16 uv_rrc; /* UV header rrc value */
15 __u64 argument_addr; /* Userspace address of uvio argument */
16 __u32 argument_len;
17 __u8 reserved14[0x40 - 0x14]; /* must be zero */
18};
19
20#define UVIO_ATT_USER_DATA_LEN 0x100
21#define UVIO_ATT_UID_LEN 0x10
22struct uvio_attest {
23 __u64 arcb_addr; /* 0x0000 */
24 __u64 meas_addr; /* 0x0008 */
25 __u64 add_data_addr; /* 0x0010 */
26 __u8 user_data[UVIO_ATT_USER_DATA_LEN]; /* 0x0018 */
27 __u8 config_uid[UVIO_ATT_UID_LEN]; /* 0x0118 */
28 __u32 arcb_len; /* 0x0128 */
29 __u32 meas_len; /* 0x012c */
30 __u32 add_data_len; /* 0x0130 */
31 __u16 user_data_len; /* 0x0134 */
32 __u16 reserved136; /* 0x0136 */
33};
34
35/*
36 * The following max values define an upper length for the IOCTL in/out buffers.
37 * However, they do not represent the maximum the Ultravisor allows which is
38 * often way smaller. By allowing larger buffer sizes we hopefully do not need
39 * to update the code with every machine update. It is therefore possible for
40 * userspace to request more memory than actually used by kernel/UV.
41 */
42#define UVIO_ATT_ARCB_MAX_LEN 0x100000
43#define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000
44#define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000
45
46#define UVIO_DEVICE_NAME "uv"
47#define UVIO_TYPE_UVC 'u'
48
49#define UVIO_IOCTL_ATT _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb)
50
51#endif /* __S390_ASM_UVDEVICE_H */