Public Review Start - RVA23 and RVB23 Profiles
Rafael Sene
The RVA23 profiles are designed to align implementations of RISC-V 64-bit application processors, enabling binary software ecosystems to rely on a large set of guaranteed extensions and a small number of discoverable coarse-grain options. An explicit non-goal of the RVA series of profiles is to allow a large degree of implementation flexibility
RVB23 profiles are intended to be used for customized 64-bit application processors that will run rich OS stacks, usually as a custom build of standard OS source-code distributions. The approach is to provide a large guaranteed set of relatively inexpensive and/or widely beneficial features but allow optionality for more expensive and/or more targeted extensions. Unlike the RVA profiles, RVB profiles explicitly do not aim to provide a single standard ISA interface supporting a wide variety of binary kernel and binary application software distributions.
The review period begins today, Wednesday, September 4, 2024, and ends on Thursday, October 3, 2024 (inclusive).
The PDFs of the RVA23 and RVB23 Profiles, along with their definitions, can be found here.
To provide feedback during the public review, please either email your comments to the public ISA-dev mailing list or submit issues to the RISC-V Profiles GitHub repository. We welcome all input and appreciate your time and effort in reviewing the specification.
During the public review period, corrections, comments, and suggestions will be collected for review by the RVA23/RVB23 Profiles Task Group. Any minor corrections and/or uncontroversial changes will be incorporated into the specification. Remaining issues or proposed changes will be addressed in the public review summary report. If no issues requiring incompatible changes are identified during the public review, the updated specifications will be sent for formal approval and ratification by the RISC-V Technical Steering Committee and the RISC-V Board of Directors.
Greg Favor, Chair, RVA23/RVB23 Profiles Task Group
Krste Asanovic, Vice-Chair, RVA23/RVB23 Profiles Task Group