/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright IBM Corp. 2022, 2024 * Author(s): Steffen Eiden <seiden@linux.ibm.com> */ #ifndef __S390_ASM_UVDEVICE_H #define __S390_ASM_UVDEVICE_H #include <linux/types.h> struct uvio_ioctl_cb { __u32 flags; __u16 uv_rc; /* UV header rc value */ __u16 uv_rrc; /* UV header rrc value */ __u64 argument_addr; /* Userspace address of uvio argument */ __u32 argument_len; __u8 reserved14[0x40 - 0x14]; /* must be zero */ }; #define UVIO_ATT_USER_DATA_LEN 0x100 #define UVIO_ATT_UID_LEN 0x10 struct uvio_attest { __u64 arcb_addr; /* 0x0000 */ __u64 meas_addr; /* 0x0008 */ __u64 add_data_addr; /* 0x0010 */ __u8 user_data[UVIO_ATT_USER_DATA_LEN]; /* 0x0018 */ __u8 config_uid[UVIO_ATT_UID_LEN]; /* 0x0118 */ __u32 arcb_len; /* 0x0128 */ __u32 meas_len; /* 0x012c */ __u32 add_data_len; /* 0x0130 */ __u16 user_data_len; /* 0x0134 */ __u16 reserved136; /* 0x0136 */ }; /** * uvio_uvdev_info - Information of supported functions * @supp_uvio_cmds - supported IOCTLs by this device * @supp_uv_cmds - supported UVCs corresponding to the IOCTL * * UVIO request to get information about supported request types by this * uvdevice and the Ultravisor. Everything is output. Bits are in LSB0 * ordering. If the bit is set in both, @supp_uvio_cmds and @supp_uv_cmds, the * uvdevice and the Ultravisor support that call. * * Note that bit 0 (UVIO_IOCTL_UVDEV_INFO_NR) is always zero for `supp_uv_cmds` * as there is no corresponding UV-call. */ struct uvio_uvdev_info { /* * If bit `n` is set, this device supports the IOCTL with nr `n`. */ __u64 supp_uvio_cmds; /* * If bit `n` is set, the Ultravisor(UV) supports the UV-call * corresponding to the IOCTL with nr `n` in the calling context (host * or guest). The value is only valid if the corresponding bit in * @supp_uvio_cmds is set as well. */ __u64 supp_uv_cmds; }; /* * The following max values define an upper length for the IOCTL in/out buffers. * However, they do not represent the maximum the Ultravisor allows which is * often way smaller. By allowing larger buffer sizes we hopefully do not need * to update the code with every machine update. It is therefore possible for * userspace to request more memory than actually used by kernel/UV. */ #define UVIO_ATT_ARCB_MAX_LEN 0x100000 #define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000 #define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000 #define UVIO_ADD_SECRET_MAX_LEN 0x100000 #define UVIO_LIST_SECRETS_LEN 0x1000 #define UVIO_RETR_SECRET_MAX_LEN 0x2000 #define UVIO_DEVICE_NAME "uv" #define UVIO_TYPE_UVC 'u' enum UVIO_IOCTL_NR { UVIO_IOCTL_UVDEV_INFO_NR = 0x00, UVIO_IOCTL_ATT_NR, UVIO_IOCTL_ADD_SECRET_NR, UVIO_IOCTL_LIST_SECRETS_NR, UVIO_IOCTL_LOCK_SECRETS_NR, UVIO_IOCTL_RETR_SECRET_NR, /* must be the last entry */ UVIO_IOCTL_NUM_IOCTLS }; #define UVIO_IOCTL(nr) _IOWR(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb) #define UVIO_IOCTL_UVDEV_INFO UVIO_IOCTL(UVIO_IOCTL_UVDEV_INFO_NR) #define UVIO_IOCTL_ATT UVIO_IOCTL(UVIO_IOCTL_ATT_NR) #define UVIO_IOCTL_ADD_SECRET UVIO_IOCTL(UVIO_IOCTL_ADD_SECRET_NR) #define UVIO_IOCTL_LIST_SECRETS UVIO_IOCTL(UVIO_IOCTL_LIST_SECRETS_NR) #define UVIO_IOCTL_LOCK_SECRETS UVIO_IOCTL(UVIO_IOCTL_LOCK_SECRETS_NR) #define UVIO_IOCTL_RETR_SECRET UVIO_IOCTL(UVIO_IOCTL_RETR_SECRET_NR) #define UVIO_SUPP_CALL(nr) (1ULL << (nr)) #define UVIO_SUPP_UDEV_INFO UVIO_SUPP_CALL(UVIO_IOCTL_UDEV_INFO_NR) #define UVIO_SUPP_ATT UVIO_SUPP_CALL(UVIO_IOCTL_ATT_NR) #define UVIO_SUPP_ADD_SECRET UVIO_SUPP_CALL(UVIO_IOCTL_ADD_SECRET_NR) #define UVIO_SUPP_LIST_SECRETS UVIO_SUPP_CALL(UVIO_IOCTL_LIST_SECRETS_NR) #define UVIO_SUPP_LOCK_SECRETS UVIO_SUPP_CALL(UVIO_IOCTL_LOCK_SECRETS_NR) #define UVIO_SUPP_RETR_SECRET UVIO_SUPP_CALL(UVIO_IOCTL_RETR_SECRET_NR) #endif /* __S390_ASM_UVDEVICE_H */
