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/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
* Userspace interface for AMD SEV and SNP guest driver.
*
* Copyright (C) 2021 Advanced Micro Devices, Inc.
*
* Author: Brijesh Singh <brijesh.singh@amd.com>
*
* SEV API specification is available at: https://developer.amd.com/sev/
*/
#ifndef __UAPI_LINUX_SEV_GUEST_H_
#define __UAPI_LINUX_SEV_GUEST_H_
#include <linux/types.h>
#define SNP_REPORT_USER_DATA_SIZE 64
struct snp_report_req {
/* user data that should be included in the report */
__u8 user_data[SNP_REPORT_USER_DATA_SIZE];
/* The vmpl level to be included in the report */
__u32 vmpl;
/* Must be zero filled */
__u8 rsvd[28];
};
struct snp_report_resp {
/* response data, see SEV-SNP spec for the format */
__u8 data[4000];
};
struct snp_derived_key_req {
__u32 root_key_select;
__u32 rsvd;
__u64 guest_field_select;
__u32 vmpl;
__u32 guest_svn;
__u64 tcb_version;
};
struct snp_derived_key_resp {
/* response data, see SEV-SNP spec for the format */
__u8 data[64];
};
struct snp_guest_request_ioctl {
/* message version number (must be non-zero) */
__u8 msg_version;
/* Request and response structure address */
__u64 req_data;
__u64 resp_data;
/* bits[63:32]: VMM error code, bits[31:0] firmware error code (see psp-sev.h) */
union {
__u64 exitinfo2;
struct {
__u32 fw_error;
__u32 vmm_error;
};
};
};
struct snp_ext_report_req {
struct snp_report_req data;
/* where to copy the certificate blob */
__u64 certs_address;
/* length of the certificate blob */
__u32 certs_len;
};
#define SNP_GUEST_REQ_IOC_TYPE 'S'
/* Get SNP attestation report */
#define SNP_GET_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x0, struct snp_guest_request_ioctl)
/* Get a derived key from the root */
#define SNP_GET_DERIVED_KEY _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x1, struct snp_guest_request_ioctl)
/* Get SNP extended report as defined in the GHCB specification version 2. */
#define SNP_GET_EXT_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x2, struct snp_guest_request_ioctl)
/* Guest message request EXIT_INFO_2 constants */
#define SNP_GUEST_FW_ERR_MASK GENMASK_ULL(31, 0)
#define SNP_GUEST_VMM_ERR_SHIFT 32
#define SNP_GUEST_VMM_ERR(x) (((u64)x) << SNP_GUEST_VMM_ERR_SHIFT)
#define SNP_GUEST_FW_ERR(x) ((x) & SNP_GUEST_FW_ERR_MASK)
#define SNP_GUEST_ERR(vmm_err, fw_err) (SNP_GUEST_VMM_ERR(vmm_err) | \
SNP_GUEST_FW_ERR(fw_err))
#define SNP_GUEST_VMM_ERR_INVALID_LEN 1
#define SNP_GUEST_VMM_ERR_BUSY 2
#endif /* __UAPI_LINUX_SEV_GUEST_H_ */