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@@ -3,6 +3,13 @@
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* Defines data structures and APIs that allow an OS to interact with UEFI
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* firmware to query information about the device
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*
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+ * This file refers the following TCG specification.
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+ * - TCG PC Client Platform Firmware Profile Specification
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+ * https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/
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+ *
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+ * - TCG EFI Protocol Specification
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+ * https://trustedcomputinggroup.org/resource/tcg-efi-protocol-specification/
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+ *
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* Copyright (c) 2020, Linaro Limited
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*/
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@@ -36,11 +43,23 @@ typedef u32 efi_tcg_event_log_bitmap;
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typedef u32 efi_tcg_event_log_format;
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typedef u32 efi_tcg_event_algorithm_bitmap;
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+/**
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+ * struct tdEFI_TCG2_VERSION - structure of EFI TCG2 version
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+ * @major: major version
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+ * @minor: minor version
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+ */
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struct efi_tcg2_version {
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u8 major;
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u8 minor;
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};
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+/**
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+ * struct tdEFI_TCG2_EVENT_HEADER - structure of EFI TCG2 event header
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+ * @header_size: size of the event header
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+ * @header_version: header version
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+ * @pcr_index: index of the PCR that is extended
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+ * @event_type: type of the event that is extended
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+ */
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struct efi_tcg2_event_header {
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u32 header_size;
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u16 header_version;
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@@ -48,12 +67,27 @@ struct efi_tcg2_event_header {
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u32 event_type;
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} __packed;
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+/**
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+ * struct tdEFI_TCG2_EVENT - structure of EFI TCG2 event
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+ * @size: total size of the event including the size component, the header
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+ * and the event data
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+ * @header: event header
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+ * @event: event to add
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+ */
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struct efi_tcg2_event {
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u32 size;
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struct efi_tcg2_event_header header;
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u8 event[];
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} __packed;
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+/**
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+ * struct tdUEFI_IMAGE_LOAD_EVENT - structure of PE/COFF image measurement
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+ * @image_location_in_memory: image address
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+ * @image_length_in_memory: image size
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+ * @image_link_time_address: image link time address
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+ * @length_of_device_path: devive path size
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+ * @device_path: device path
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+ */
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struct uefi_image_load_event {
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efi_physical_addr_t image_location_in_memory;
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u64 image_length_in_memory;
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@@ -62,6 +96,23 @@ struct uefi_image_load_event {
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struct efi_device_path device_path[];
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};
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+/**
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+ * struct tdEFI_TCG2_BOOT_SERVICE_CAPABILITY - protocol capability information
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+ * @size: allocated size of the structure
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+ * @structure_version: version of this structure
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+ * @protocol_version: version of the EFI TCG2 protocol.
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+ * @hash_algorithm_bitmap: supported hash algorithms
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+ * @supported_event_logs: bitmap of supported event log formats
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+ * @tpm_present_flag: false = TPM not present
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+ * @max_command_size: max size (in bytes) of a command
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+ * that can be sent to the TPM
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+ * @max_response_size: max size (in bytes) of a response that
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+ * can be provided by the TPM
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+ * @manufacturer_id: 4-byte Vendor ID
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+ * @number_of_pcr_banks: maximum number of PCR banks
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+ * @active_pcr_banks: bitmap of currently active
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+ * PCR banks (hashing algorithms).
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+ */
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struct efi_tcg2_boot_service_capability {
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u8 size;
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struct efi_tcg2_version structure_version;
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@@ -86,7 +137,7 @@ struct efi_tcg2_boot_service_capability {
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#define TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_ERRATA_TPM2 2
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/**
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- * struct TCG_EfiSpecIdEventAlgorithmSize
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+ * struct TCG_EfiSpecIdEventAlgorithmSize - hashing algorithm information
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*
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* @algorithm_id: algorithm defined in enum tpm2_algorithms
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* @digest_size: size of the algorithm
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@@ -97,7 +148,7 @@ struct tcg_efi_spec_id_event_algorithm_size {
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} __packed;
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/**
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- * struct TCG_EfiSpecIDEventStruct
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+ * struct TCG_EfiSpecIDEventStruct - content of the event log header
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*
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* @signature: signature, set to Spec ID Event03
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* @platform_class: class defined in TCG ACPI Specification
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@@ -130,7 +181,7 @@ struct tcg_efi_spec_id_event {
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} __packed;
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/**
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- * struct tdEFI_TCG2_FINAL_EVENTS_TABLE
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+ * struct tdEFI_TCG2_FINAL_EVENTS_TABLE - log entries after Get Event Log
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* @version: version number for this structure
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* @number_of_events: number of events recorded after invocation of
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* GetEventLog()
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