gem5

build

@@ -37,6 +37,11 @@ case "$arch" in
     # so let's stick to versatile for now.
     defconfig=qemu_arm_versatile_defconfig
   ;;
+  arm-gem5)
+    # qemu_arm_vexpress_defconfig required a newer QEMU than 2.0.0 on a Ubuntu host.
+    # so let's stick to versatile for now.
+    defconfig=qemu_arm_versatile_defconfig
+  ;;
   aarch64)
     defconfig=qemu_aarch64_virt_defconfig
   ;;
@@ -56,6 +61,16 @@ make O="$outdir" BR2_EXTERNAL="$(pwd)/../kernel_module" "$defconfig"
 # TODO Can't get rid of this for now.
 # http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
 cat ../buildroot_config_fragment >> "${outdir}/.config"
+if [ "$arch" = 'arm-gem5' ]; then
+  echo "\
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE=../kernel_config_gem5
+" >> "${outdir}/.config"
+else
+  echo "\
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=../kernel_config_fragment
+" >> "${outdir}/.config"
+fi
 if $x11; then
   cat ../buildroot_config_fragment_x11 >> "${outdir}/.config"
 fi
@@ -77,3 +92,6 @@ time \
   $extra_targets \
   all \
 ;
+if [ "$arch" = 'arm-gem5' ]; then
+  ./build-gem5
+fi