diff options
Diffstat (limited to 'arch/s390/include/uapi/asm/uvdevice.h')
| -rw-r--r-- | arch/s390/include/uapi/asm/uvdevice.h | 102 |
1 files changed, 102 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 000000000..b9c2f14a6 --- /dev/null +++ b/arch/s390/include/uapi/asm/uvdevice.h @@ -0,0 +1,102 @@ +/* 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 */ +}; + +/** + * 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 contextx (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_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, + /* 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_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) + +#endif /* __S390_ASM_UVDEVICE_H */ |