This commit, https://gem5-review.googlesource.com/c/public/gem5/+/64831, changed the default 'vendor_string' for the 'X86ISA' SimObject from 'M5 Simulator' and 'AuthenticAMD'. Unforunately due to an issue highlighted here: https://gem5.atlassian.net/browse/GEM5-1300 we cannot use the 'AuthenticAMD'. Therefore, this change updates the default vector_string to HygonGenuine. The HygonGenuine is simple but works. Change-Id: I21421da8ae73e76d9daaf2fdd0b3238d5b309172 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65492 Tested-by: kokoro <noreply+kokoro@google.com> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>