There have been some news since I published Performance simulation of RISC-V Vector
Rivos Inc (a recent contender in the RISC-V race) has been working on extending GEM5 to support RVV.
More info are available on this post of the gem5-dev mailing list and the source code is accessible on Rivos's github page: https://github.com/rivosinc/gem5/commits/rivos/dev/joy/initial_RVV_support.
It seems their port is not directly related to Cristobal Ramirez / PCLT effort but you should still be able to follow the direction given in my initial article.
