Allow passing options to gem5 itself instead of fs.py

run

@@ -14,9 +14,10 @@ nographic=false
 extra_append='nokaslr norandmaps printk.devkmsg=on printk.time=y'
 extra_flags=''
 gem5=false
+gem5opts=''
 initrd=false
 root=''
-while getopts a:Dde:giknt:x OPT; do
+while getopts a:Dde:G:giknt:x OPT; do
   case "$OPT" in
     a)
       arch="$OPTARG"
@@ -40,6 +41,9 @@ while getopts a:Dde:giknt:x OPT; do
     g)
       gem5=true
       ;;
+    G)
+      gem5opts="$OPTARG"
+      ;;
     i)
       initrd=true
       ;;
@@ -60,6 +64,7 @@ if $gem5; then
     cmd="\
 M5_PATH='$(pwd)/gem5/gem5-system' \
 '${gem5_dir}/build/X86/gem5.opt' \
+${gem5opts} \
 '${gem5_dir}/configs/example/fs.py' \
 --disk-image='${outdir}/images/rootfs.ext2' \
 --kernel='${outdir}/build/linux-custom/vmlinux' \
@@ -70,6 +75,7 @@ M5_PATH='$(pwd)/gem5/gem5-system' \
 M5_PATH='$(pwd)/gem5/gem5-system' \
 $debug_vm \
 '${gem5_dir}/build/ARM/gem5.opt' \
+${gem5opts} \
 '${gem5_dir}/configs/example/fs.py' \
 --command-line='earlyprintk=pl011,0x1c090000 console=ttyAMA0 lpj=19988480 rw loglevel=8 mem=512MB root=/dev/sda $extra_append' \
 --disk-image='${outdir}/images/rootfs.ext2' \