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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "efi.h"
/* The UEFI specification defines the interface between the confidential virtual guest OS and
* virtual firmware as EFI_CC_MEASUREMENT_PROTOCOL. The measurements are captured in the CC eventlog
* that follows the TCG2 format. TPM PCR registers are mapped to vendor specific measurement registers
* and the mapping can be queried using MapPcrToMrIndex service as part of the protocol.
*
* The "Confidential Computing" section in the UEFI specification covers the details. */
#define EFI_CC_MEASUREMENT_PROTOCOL_GUID \
GUID_DEF(0x96751a3d, 0x72f4, 0x41a6, 0xa7, 0x94, 0xed, 0x5d, 0x0e, 0x67, 0xae, 0x6b)
#define EFI_CC_EVENT_HEADER_VERSION 1
#define EFI_CC_EVENT_LOG_FORMAT_TCG_2 0x00000002
typedef struct {
uint8_t Type;
uint8_t SubType;
} EFI_CC_TYPE;
typedef struct {
uint8_t Major;
uint8_t Minor;
} EFI_CC_VERSION;
typedef struct {
uint8_t Size;
EFI_CC_VERSION StructureVersion;
EFI_CC_VERSION ProtocolVersion;
uint32_t HashAlgorithmBitmap;
uint32_t SupportedEventLogs;
EFI_CC_TYPE CcType;
} EFI_CC_BOOT_SERVICE_CAPABILITY;
typedef struct {
uint32_t HeaderSize;
uint16_t HeaderVersion;
uint32_t MrIndex;
uint32_t EventType;
} _packed_ EFI_CC_EVENT_HEADER;
typedef struct {
uint32_t Size;
EFI_CC_EVENT_HEADER Header;
uint8_t Event[];
} _packed_ EFI_CC_EVENT;
typedef struct EFI_CC_MEASUREMENT_PROTOCOL EFI_CC_MEASUREMENT_PROTOCOL;
struct EFI_CC_MEASUREMENT_PROTOCOL {
EFI_STATUS (EFIAPI *GetCapability)(
EFI_CC_MEASUREMENT_PROTOCOL *This,
EFI_CC_BOOT_SERVICE_CAPABILITY *ProtocolCapability);
void *GetEventLog;
EFI_STATUS (EFIAPI *HashLogExtendEvent)(
EFI_CC_MEASUREMENT_PROTOCOL *This,
uint64_t Flags,
EFI_PHYSICAL_ADDRESS DataToHash,
uint64_t DataToHashLen,
EFI_CC_EVENT *EfiCcEvent);
EFI_STATUS (EFIAPI *MapPcrToMrIndex)(
EFI_CC_MEASUREMENT_PROTOCOL *This,
uint32_t PcrIndex,
uint32_t *MrIndex);
};
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