//
// Copyright 2024 The Project Oak Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package oak.attestation.v1;

option go_package = "proto/oak/attestation/v1";
option java_multiple_files = true;
option java_package = "com.google.oak.attestation.v1";

// The versions of the components in the AMD SEV-SNP platform Trusted Compute
// Base (TCB).
message TcbVersion {
  // The current security version number (SVN) of the secure processor (PSP)
  // bootloader.
  uint32 boot_loader = 1;

  // The current SVN of the PSP operating system.
  uint32 tee = 2;

  // The current SVN of the SNP firmware.
  uint32 snp = 3;

  // The lowest current patch level of all the CPU cores.
  uint32 microcode = 4;

  // The current SVN of the Flexible Memory Controller (FMC) firmware. FMC is
  // a component in the CPU that manages communication between the processor
  // and memory. Field is used with AMD Turin CPUs, otherwise it must be zero
  // or unpopulated.
  uint32 fmc = 5;
}
