| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2021 Advanced Micro Devices, Inc. |
| * |
| * Author: Brijesh Singh <brijesh.singh@amd.com> |
| * |
| * SEV-SNP API spec is available at https://developer.amd.com/sev |
| */ |
| |
| #ifndef __VIRT_SEVGUEST_H__ |
| #define __VIRT_SEVGUEST_H__ |
| |
| #include <linux/types.h> |
| |
| #define MAX_AUTHTAG_LEN 32 |
| |
| /* See SNP spec SNP_GUEST_REQUEST section for the structure */ |
| enum msg_type { |
| SNP_MSG_TYPE_INVALID = 0, |
| SNP_MSG_CPUID_REQ, |
| SNP_MSG_CPUID_RSP, |
| SNP_MSG_KEY_REQ, |
| SNP_MSG_KEY_RSP, |
| SNP_MSG_REPORT_REQ, |
| SNP_MSG_REPORT_RSP, |
| SNP_MSG_EXPORT_REQ, |
| SNP_MSG_EXPORT_RSP, |
| SNP_MSG_IMPORT_REQ, |
| SNP_MSG_IMPORT_RSP, |
| SNP_MSG_ABSORB_REQ, |
| SNP_MSG_ABSORB_RSP, |
| SNP_MSG_VMRK_REQ, |
| SNP_MSG_VMRK_RSP, |
| |
| SNP_MSG_TYPE_MAX |
| }; |
| |
| enum aead_algo { |
| SNP_AEAD_INVALID, |
| SNP_AEAD_AES_256_GCM, |
| }; |
| |
| struct snp_guest_msg_hdr { |
| u8 authtag[MAX_AUTHTAG_LEN]; |
| u64 msg_seqno; |
| u8 rsvd1[8]; |
| u8 algo; |
| u8 hdr_version; |
| u16 hdr_sz; |
| u8 msg_type; |
| u8 msg_version; |
| u16 msg_sz; |
| u32 rsvd2; |
| u8 msg_vmpck; |
| u8 rsvd3[35]; |
| } __packed; |
| |
| struct snp_guest_msg { |
| struct snp_guest_msg_hdr hdr; |
| u8 payload[4000]; |
| } __packed; |
| |
| #endif /* __VIRT_SEVGUEST_H__ */ |
