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  • 2021.2
  • 06/11/2021
  • Public

Step 6: Configure Intel® TCC Tools in BIOS

Certain features require BIOS configuration. In this step, you will configure these settings.
The reference BIOS may differ from BIOS versions offered by BIOS vendors. If you cannot find these settings in the BIOS, contact your BIOS vendor for more information.
The
Software SRAM
option enables or disables this capability. Software SRAM enables you to allocate low-latency memory buffers for your real-time applications. Software SRAM is a software construct that uses hardware capabilities to allocate a portion of the physical address space into the cache so the addresses are less likely to be evicted by the same or other processes. For details about the Software SRAM option, see the Developer Guide.
The
Data Streams Optimizer
option enables or disables the tuning configuration selected by the data streams optimizer tool. The tool, via various tuning configurations, improves data movement between processor subsystems by instructing the BIOS to write values to registers. For details about the Data Streams Optimizer option, see the Developer Guide.
The
Intel® TCC Authentication
option enables or disables the ability to authenticate capsules generated by the data streams optimizer and cache configurator tools. A capsule is a binary used to change a system’s tuning configuration by updating certain areas of the firmware, known as “subregions.” You must implement authentication to protect the subregions in a production environment. In a preproduction environment, you can disable authentication for initial exploration. Note that even if you disable authentication in BIOS, you are still required to sign the capsules. This is enforced to adhere to best security practices.
Based on your use case, you may decide later to use a different BIOS configuration.

Configure the BIOS Options

Follow these steps to configure the BIOS. The screenshots may differ depending on a given BIOS version.
  1. In the BIOS, navigate to
    Intel Advanced Menu
    >
    Intel® Time Coordinated Computing
    .
  2. Set
    Software SRAM
    to
    <Enabled>
    .
    Not applicable for systems running the PR1 release of the Yocto Project*-based BSP for Intel Atom® x6000E Series processors.
  3. Set
    Data Streams Optimizer
    to
    <Enabled>
    .
    Not applicable for systems running the PR1 release of the Yocto Project*-based BSP for Intel Atom® x6000E Series processors.
  4. Disable authentication ONLY IF working with an Intel reference BIOS binary with Intel® Boot Guard profile set to 0 (legacy, SEP0) on an Intel CRB or RVP and the End Of Manufacturing flow has not been completed. This is to facilitate preproduction evaluation. Alternatively, you can enable authentication for preproduction and production use. For details, see the white paper Intel® Time Coordinated Computing (Intel® TCC) Security for UEFI BIOS.
    To disable security authentication:
    For systems running the PR1 release of the Yocto Project*-based BSP for Intel Atom® x6000E Series processors:
    1. Set
      Intel® TCC Authentication
      to
      <Disabled>
    For other systems:
    1. When Intel® TCC Mode is enabled, the Intel® TCC Authentication Menu item is available and enabled by default. Confirm that your screen looks similar to the image:
    2. Navigate to the
      Intel® TCC Authentication <OEM Enrolled Key>
      field and change it to
      <Disabled>
      :
      A message will appear:
    3. Press
      Enter
      to confirm the change.
  5. Save your changes and exit the BIOS. The system reboots.
These options do not affect any other Intel® TCC Tools capabilities. You can use other capabilities when these options are disabled.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.