Module protocol

The module includes the definitions of data structures according to SEV-SNP specification.

Structs

• GuestFieldSelect
  Indicate which guest-selectable fields will be mixed into the key. See GUEST_FIELD_SELECT in Table 19, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SnpDerivedKeyReq
  Request structure for the SNP_GET_DERIVED_KEY ioctl. See MSG_KEY_REQ in Table 18, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SnpDerivedKeyResp
  Response structure for the SNP_GET_DERIVED_KEY ioctl. See MSG_KEY_RSP in Table 20, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SnpGuestRequestIoctl
  Ioctl struct defined by Linux.
• SnpReport
  Report structure. See ATTESTATION_REPORT in Table 22, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SnpReportReq
  Request structure for the SNP_GET_REPORT ioctl. See MSG_REPORT_REQ in Table 21, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SnpReportResp
  Response structure for the SNP_GET_REPORT ioctl. See MSG_REPORT_RSP in Table 24, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• VmmErrorCode
  VMM error code.

Constants

• SNP_DERIVED_KEY_SIZE
  See DERIVED_KEY in Table 20, “SEV Secure Nested Paging Firmware ABI specification”, Revision 1.55.
• SNP_GUEST_REQ_IOC_TYPE
  Ioctl type defined by Linux.
• SNP_GUEST_REQ_MSG_VERSION
  Value for the msg_version member in SNP_GUEST_REQ_MSG_VERSION. Use 1 for now.
• SNP_REPORT_DATA_SIZE
  Size of report_data member in SnpReport.
• SNP_REPORT_SIZE
  Size of the SnpReport.