[scripts] add smp option to do-qemuarm and do-qemux86

scripts/do-qemux86

@@ -4,6 +4,7 @@ function HELP {
     echo "help:"
     echo "-6 x86-64"
     echo "-m <memory in MB>"
+    echo "-s <number of cpus>"
     echo "-h for help"
     echo "all arguments after -- are passed to qemu directly"
     exit 1
@@ -11,13 +12,15 @@ function HELP {
 
 DO_64BIT=0
 MEMSIZE=512
+SMP=1
 SUDO=""
 MAKE_VARS=""
 
-while getopts bdhm:cMnt6 FLAG; do
+while getopts bdhm:cMnt6s: FLAG; do
     case $FLAG in
         6) DO_64BIT=1;;
         m) MEMSIZE=$OPTARG;;
+        s) SMP=$OPTARG;;
         h) HELP;;
         \?)
             echo unrecognized option
@@ -35,7 +38,7 @@ else
     PROJECT="pc-x86-test"
 fi
 
-ARGS=" -m $MEMSIZE -kernel build-${PROJECT}/lk.elf -nographic"
+ARGS=" -m $MEMSIZE -smp $SMP -kernel build-${PROJECT}/lk.elf -nographic"
 
 make $MAKE_VARS $PROJECT -j4 &&
 echo $SUDO $QEMU $ARGS $@ &&