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Diffstat (limited to '')
| -rw-r--r-- | arch/s390/include/uapi/asm/uvdevice.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/uvdevice.h b/arch/s390/include/uapi/asm/uvdevice.h new file mode 100644 index 000000000000..10a5ac918e02 --- /dev/null +++ b/arch/s390/include/uapi/asm/uvdevice.h @@ -0,0 +1,51 @@ +/* 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 */ |