USB/Thunderbolt Changes For Linux 5.12 Include More USB4 Work

Greg Kroah-Hartman sent in the big set of USB/Thunderbolt updates already for the ongoing Linux 5.12 merge window.

As has been the case for the recent Linux kernel cycles, USB4 bring-up remains ongoing and a big area of focus in fleshing out all of the features for this latest USB standard. Some of the Linux 5.12 highlights in the USB/Thunderbolt subsystem include:

- Security Level 5 to disable PCIe tunneling with USB4 / Thunderbolt 4 devices are now supported.

- The ability to de-authorize Thunderbolt devices after a given device has been authorized.

- Continued work on the USB Type-C support and the Type-C Port Manager (TCPM).

- Support for native USB4 control _OSC specified by the ACPI 6.4 specification. The new _OSC capability is used for negotiating the native connection manager support.

More details on the USB and Thunderbolt changes for Linux 5.12 via the pull request.