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 11 struct 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 22 struct 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 * uvio_uvdev_info - Information of supported functions 37 * @supp_uvio_cmds - supported IOCTLs by this device 38 * @supp_uv_cmds - supported UVCs corresponding to the IOCTL 39 * 40 * UVIO request to get information about supported request types by this 41 * uvdevice and the Ultravisor. Everything is output. Bits are in LSB0 42 * ordering. If the bit is set in both, @supp_uvio_cmds and @supp_uv_cmds, the 43 * uvdevice and the Ultravisor support that call. 44 * 45 * Note that bit 0 (UVIO_IOCTL_UVDEV_INFO_NR) is always zero for `supp_uv_cmds` 46 * as there is no corresponding UV-call. 47 */ 48 struct uvio_uvdev_info { 49 /* 50 * If bit `n` is set, this device supports the IOCTL with nr `n`. 51 */ 52 __u64 supp_uvio_cmds; 53 /* 54 * If bit `n` is set, the Ultravisor(UV) supports the UV-call 55 * corresponding to the IOCTL with nr `n` in the calling contextx (host 56 * or guest). The value is only valid if the corresponding bit in 57 * @supp_uvio_cmds is set as well. 58 */ 59 __u64 supp_uv_cmds; 60 }; 61 62 /* 63 * The following max values define an upper length for the IOCTL in/out buffers. 64 * However, they do not represent the maximum the Ultravisor allows which is 65 * often way smaller. By allowing larger buffer sizes we hopefully do not need 66 * to update the code with every machine update. It is therefore possible for 67 * userspace to request more memory than actually used by kernel/UV. 68 */ 69 #define UVIO_ATT_ARCB_MAX_LEN 0x100000 70 #define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000 71 #define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000 72 #define UVIO_ADD_SECRET_MAX_LEN 0x100000 73 #define UVIO_LIST_SECRETS_LEN 0x1000 74 75 #define UVIO_DEVICE_NAME "uv" 76 #define UVIO_TYPE_UVC 'u' 77 78 enum UVIO_IOCTL_NR { 79 UVIO_IOCTL_UVDEV_INFO_NR = 0x00, 80 UVIO_IOCTL_ATT_NR, 81 UVIO_IOCTL_ADD_SECRET_NR, 82 UVIO_IOCTL_LIST_SECRETS_NR, 83 UVIO_IOCTL_LOCK_SECRETS_NR, 84 /* must be the last entry */ 85 UVIO_IOCTL_NUM_IOCTLS 86 }; 87 88 #define UVIO_IOCTL(nr) _IOWR(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb) 89 #define UVIO_IOCTL_UVDEV_INFO UVIO_IOCTL(UVIO_IOCTL_UVDEV_INFO_NR) 90 #define UVIO_IOCTL_ATT UVIO_IOCTL(UVIO_IOCTL_ATT_NR) 91 #define UVIO_IOCTL_ADD_SECRET UVIO_IOCTL(UVIO_IOCTL_ADD_SECRET_NR) 92 #define UVIO_IOCTL_LIST_SECRETS UVIO_IOCTL(UVIO_IOCTL_LIST_SECRETS_NR) 93 #define UVIO_IOCTL_LOCK_SECRETS UVIO_IOCTL(UVIO_IOCTL_LOCK_SECRETS_NR) 94 95 #define UVIO_SUPP_CALL(nr) (1ULL << (nr)) 96 #define UVIO_SUPP_UDEV_INFO UVIO_SUPP_CALL(UVIO_IOCTL_UDEV_INFO_NR) 97 #define UVIO_SUPP_ATT UVIO_SUPP_CALL(UVIO_IOCTL_ATT_NR) 98 #define UVIO_SUPP_ADD_SECRET UVIO_SUPP_CALL(UVIO_IOCTL_ADD_SECRET_NR) 99 #define UVIO_SUPP_LIST_SECRETS UVIO_SUPP_CALL(UVIO_IOCTL_LIST_SECRETS_NR) 100 #define UVIO_SUPP_LOCK_SECRETS UVIO_SUPP_CALL(UVIO_IOCTL_LOCK_SECRETS_NR) 101 102 #endif /* __S390_ASM_UVDEVICE_H */ 103
