fwupd/plugins/coreboot

coreboot

Introduction

Until now only the version detection has been implemented.

System identification

coreboot can be detected the following ways:

1. by parsing SMBIOS type 0 vendor string. On coreboot enabled platforms it's always coreboot.
2. by parsing ACPI tables. An ACPI device with the _HID BOOT0000 exists. (This HID has been reserved for coreboot enabled platforms)
3. by parsing the devicetree. A node under firmware/coreboot with the compatible id coreboot exists.

coreboot version string

The coreboot version string can have an optional prefix (see below). After the optional prefix the major, minor string follows and finally the build string, containing the exact commit and repository state, follows.

For example:

4.10-989-gc8a4e4b9c5-dirty

Exception on Lenovo devices:

The thinkpad_acpi kernel module requires a specific pattern in the DMI version string. To satisfy those requirements coreboot adds the CBETxxxx prefix to the DMI version string on all Lenovo devices.

For example:

CBET4000 4.10-989-gc8a4e4b9c5-dirty

The coreboot DMI version string always starts with CBET.

GUID Generation

These device uses hardware ID values which are derived from SMBIOS. The following HWIDs are added on coreboot enabled platforms:

• HardwareID-3
• HardwareID-4
• HardwareID-5
• HardwareID-6
• HardwareID-10

They do match the values provided by fwupdtool hwids or the ComputerHardwareIds.exe Windows utility.

Vendor ID Security

The vendor ID is set from the BIOS vendor, in this instance DMI:coreboot