52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright IBM Corp. 2022
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* Author(s): Steffen Eiden <seiden@linux.ibm.com>
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*/
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#ifndef __S390_ASM_UVDEVICE_H
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#define __S390_ASM_UVDEVICE_H
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#include <linux/types.h>
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struct uvio_ioctl_cb {
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__u32 flags;
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__u16 uv_rc; /* UV header rc value */
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__u16 uv_rrc; /* UV header rrc value */
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__u64 argument_addr; /* Userspace address of uvio argument */
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__u32 argument_len;
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__u8 reserved14[0x40 - 0x14]; /* must be zero */
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};
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#define UVIO_ATT_USER_DATA_LEN 0x100
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#define UVIO_ATT_UID_LEN 0x10
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struct uvio_attest {
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__u64 arcb_addr; /* 0x0000 */
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__u64 meas_addr; /* 0x0008 */
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__u64 add_data_addr; /* 0x0010 */
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__u8 user_data[UVIO_ATT_USER_DATA_LEN]; /* 0x0018 */
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__u8 config_uid[UVIO_ATT_UID_LEN]; /* 0x0118 */
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__u32 arcb_len; /* 0x0128 */
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__u32 meas_len; /* 0x012c */
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__u32 add_data_len; /* 0x0130 */
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__u16 user_data_len; /* 0x0134 */
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__u16 reserved136; /* 0x0136 */
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};
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/*
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* The following max values define an upper length for the IOCTL in/out buffers.
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* However, they do not represent the maximum the Ultravisor allows which is
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* often way smaller. By allowing larger buffer sizes we hopefully do not need
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* to update the code with every machine update. It is therefore possible for
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* userspace to request more memory than actually used by kernel/UV.
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*/
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#define UVIO_ATT_ARCB_MAX_LEN 0x100000
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#define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000
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#define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000
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#define UVIO_DEVICE_NAME "uv"
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#define UVIO_TYPE_UVC 'u'
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#define UVIO_IOCTL_ATT _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb)
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#endif /* __S390_ASM_UVDEVICE_H */
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