24.8.1. gem5 m5 executable
m5 is a guest command line utility that is installed and run on the guest, that serves as a CLI front-end for the m5ops
Its source is present in the gem5 tree: https://github.com/gem5/gem5/blob/6925bf55005c118dc2580ba83e0fa10b31839ef9/util/m5/m5.c
It is possible to guess what most tools do from the corresponding m5ops, but let’s at least document the less obvious ones here.
In LKMC we build m5 with:
./build-m5 --arch aarch64
The m5 executable can be run on User mode simulation as normal with:
./run --arch aarch64 --emulator gem5 --userland "$(./getvar --arch aarch64 out_rootfs_overlay_bin_dir)/m5" --cli-args dumpstats
This can be a good test m5ops since it executes very quickly.