The long/nightly tests are failing due to timeout (e.g.,: https://jenkins.gem5.org/job/nightly/398/). We must therefore be more careful about what we test on a nightly basis. Each of these X86 boot tests takes an hour and, generally, are largely the same (just with different CPU cores, cache hierarchy, and memory system). Given this is largely redundant, some of these tests have been remove dto save on testing time. Change-Id: I761fca1aa5e111a03183f83d4e326aaea1bdbc3a Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65192 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>