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/** @file
Secure VM Service Module (SVSM) Definition.
Provides data types allowing an SEV-SNP guest to interact with the SVSM.
Copyright (C) 2024, Advanced Micro Devices, Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Specification Reference:
Secure VM Service Module Specification
**/
#ifndef SVSM_H_
#define SVSM_H_
#include <Base.h>
#include <Uefi.h>
#include <Library/BaseLib.h>
//
// The SVSM definitions are part of the SNP Secrets Page:
// An SVSM is considered present if the SvsmSize field is non-zero.
//
typedef PACKED struct {
UINT8 Reserved1[320];
UINT64 SvsmBase;
UINT64 SvsmSize;
UINT64 SvsmCaa;
UINT32 SvsmMaxVersion;
UINT8 SvsmGuestVmpl;
UINT8 Reserved2[3];
} SVSM_INFORMATION;
typedef PACKED struct {
UINT8 SvsmCallPending;
UINT8 SvsmMemAvailable;
UINT8 Reserved1[6];
//
// The remainder of the CAA 4KB area can be used for argument
// passing to the SVSM.
//
UINT8 SvsmBuffer[SIZE_4KB - 8];
} SVSM_CAA;
#define SVSM_SUCCESS 0x00000000
#define SVSM_ERR_INCOMPLETE 0x80000000
#define SVSM_ERR_UNSUPPORTED_PROTOCOL 0x80000001
#define SVSM_ERR_UNSUPPORTED_CALL 0x80000002
#define SVSM_ERR_INVALID_ADDRESS 0x80000003
#define SVSM_ERR_INVALID_FORMAT 0x80000004
#define SVSM_ERR_INVALID_PARAMETER 0x80000005
#define SVSM_ERR_INVALID_REQUEST 0x80000006
#define SVSM_ERR_BUSY 0x80000007
#define SVSM_ERR_PVALIDATE_FAIL_INPUT 0x80001001
#define SVSM_ERR_PVALIDATE_FAIL_SIZE_MISMATCH 0x80001006
#define SVSM_ERR_PVALIDATE_FAIL_NO_CHANGE 0x80001010
typedef PACKED struct {
UINT16 Entries;
UINT16 Next;
UINT8 Reserved[4];
} SVSM_PVALIDATE_HEADER;
typedef union {
struct {
UINT64 PageSize : 2;
UINT64 Action : 1;
UINT64 IgnoreCf : 1;
UINT64 Reserved_2 : 8;
UINT64 Address : 52;
} Bits;
UINT64 Uint64;
} SVSM_PVALIDATE_ENTRY;
typedef PACKED struct {
SVSM_PVALIDATE_HEADER Header;
SVSM_PVALIDATE_ENTRY Entry[];
} SVSM_PVALIDATE_REQUEST;
#define SVSM_PVALIDATE_MAX_ENTRY \
((sizeof (((SVSM_CAA *)0)->SvsmBuffer) - sizeof (SVSM_PVALIDATE_HEADER)) / sizeof (SVSM_PVALIDATE_ENTRY))
typedef union {
SVSM_PVALIDATE_REQUEST PvalidateRequest;
} SVSM_REQUEST;
typedef union {
struct {
UINT32 CallId;
UINT32 Protocol;
} Id;
UINT64 Uint64;
} SVSM_FUNCTION;
#endif
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