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- /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
- /*
- * Copyright IBM Corp. 2022
- * Author(s): Steffen Eiden <[email protected]>
- */
- #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 */
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