/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright IBM Corp. 2022 * 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 */ }; /* * 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_DEVICE_NAME "uv" #define UVIO_TYPE_UVC 'u' #define UVIO_IOCTL_ATT _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb) #endif /* __S390_ASM_UVDEVICE_H */