resources: Add gem5_bridge driver to x86-ubuntu build & boot

Author: nkrim

src/x86-ubuntu/files/gem5_init.sh

@@ -15,6 +15,10 @@ mount -t sysfs /sys /sys
 cmdline=$(cat /proc/cmdline)
 no_systemd=false
 
+# Load gem5_bridge driver
+depmod --quick
+modprobe gem5_bridge
+
 # gem5-bridge exit signifying that kernel is booted
 # This will cause the simulation to exit. Note that this will
 # cause qemu to fail.

src/x86-ubuntu/scripts/post-installation.sh

@@ -45,6 +45,7 @@ git clone https://github.com/gem5/gem5.git --depth=1 --filter=blob:none --no-che
 pushd gem5
 # Checkout just the files we need
 git sparse-checkout add util/m5
+git sparse-checkout add util/gem5_bridge
 git sparse-checkout add include
 git checkout
 # Install the headers globally so that other benchmarks can use them
@@ -56,6 +57,11 @@ scons build/x86/out/m5
 cp build/x86/out/m5 /usr/local/bin/
 cp build/x86/out/libm5.a /usr/local/lib/
 popd
+
+# Build and insert the gem5_bridge driver
+pushd util/gem5_bridge
+make build install
+popd
 popd
 
 # rename the m5 binary to gem5-bridge