Vendor ID Assignment
The RISC-V Foundation Vendor ID assignment uses JEDEC manufacturer IDs as defined in the RISC-V ISA Privileged Architecture Specification v1.10 Section 3.1.2 Machine Vendor ID Register mvendorid and repeated here for convenience. Refer to the full Privileged Architecture Specification here.
3.1.2 Machine Vendor ID Register mvendorid
The mvendorid CSR is an XLEN-bit read-only register providing the JEDEC manufacturer ID of the provider of the core. This register must be readable in any implementation, but a value of 0 can be returned to indicate the field is not implemented or that this is a non-commercial implementation.