The Arm®v8-M Security Extensions - Requirements on Development Tools provides information about the requirements on Development Tools in order to support Armv8-M and Armv8.1-M Security Extensions or the new TT instruction of Armv8-M.
As identified more fully in the LICENSE file, this project is licensed under CC-BY-SA-4.0 along with an additional patent license. The language in the additional patent license is largely identical to that in Apache-2.0 (specifically, Section 3 of Apache-2.0 as reflected at https://www.apache.org/licenses/LICENSE-2.0) with two exceptions.
First, several changes were made related to the defined terms so as to reflect the fact that such defined terms need to align with the terminology in CC-BY-SA-4.0 rather than Apache-2.0 (e.g., changing “Work” to “Licensed Material”).
Second, the defensive termination clause was changed such that the scope of defensive termination applies to “any licenses granted to You” (rather than “any patent licenses granted to You”). This change is intended to help maintain a healthy ecosystem by providing additional protection to the community against patent litigation claims.
Please report defects in the Arm®v8-M Security Extensions - Requirements on Development Tools to the issue tracker page on GitHub.