tests: Support UML kernel as a replacement for KVM

This allows UML builds to be used in running user mode without having to
run the full x86 kernel in virtual machine.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/vm/inside.sh

@@ -31,6 +31,7 @@ TIMEWARP=$(sed 's/.*timewarp=\([^ ]*\) .*/\1/' /proc/cmdline)
 EPATH=$(sed 's/.*EPATH=\([^ ]*\) .*/\1/' /proc/cmdline)
 TELNET=$(sed 's/.*TELNET=\([^ ]*\) .*/\1/' /proc/cmdline)
 ARGS=$(sed 's/.*ARGS=\([^ ]*\)\( \|$\).*/\1/' /proc/cmdline)
+LOGDIR=$(sed 's/.*LOGDIR=\([^ ]*\)\( \|$\).*/\1/' /proc/cmdline)
 
 # create /dev entries we need
 mknod -m 660 /dev/ttyS0 c 4 64
@@ -90,7 +91,11 @@ ip link set lo up
 
 # create logs mountpoint and mount the logshare
 mkdir /tmp/logs
-mount -t 9p -o trans=virtio,rw logshare /tmp/logs
+if grep -q rootfstype=hostfs /proc/cmdline; then
+    mount -t hostfs none /tmp/logs -o $LOGDIR
+else
+    mount -t 9p -o trans=virtio,rw logshare /tmp/logs
+fi
 
 # allow access to any outside directory (e.g. /tmp) we also have
 mkdir /tmp/host

tests/hwsim/vm/vm-run.sh

@@ -40,7 +40,18 @@ if [ -z "$KERNEL" ] && [ -z "$KERNELDIR" ] ; then
 	exit 2
 fi
 if [ -z "$KERNEL" ] ; then
+	if [ -e $KERNELDIR/arch/x86_64/boot/bzImage ]; then
 		KERNEL=$KERNELDIR/arch/x86_64/boot/bzImage
+	elif [ -e $KERNELDIR/linux ]; then
+		KERNEL=$KERNELDIR/linux
+	else
+		echo "No suitable kernel image found from KERNELDIR"
+		exit 2
+	fi
+fi
+if [ ! -e $KERNEL ]; then
+	echo "Kernel image not found: $KERNEL"
+	exit 2
 fi
 
 
@@ -114,13 +125,17 @@ fi
 
 echo "Starting test run in a virtual machine"
 
-KVM=kvm
+if [ -x $KERNEL ]; then
-for kvmprog in kvm qemu-kvm; do
+	unset KVM
+else
+	KVM=kvm
+	for kvmprog in kvm qemu-kvm; do
 		if $kvmprog --version &> /dev/null; then
 			KVM=$kvmprog
 			break
 		fi
-done
+	done
+fi
 
 argsfile=$(mktemp)
 if [ $? -ne 0 ] ; then
@@ -133,17 +148,49 @@ trap finish EXIT
 
 echo "$RUN_TEST_ARGS" > $argsfile
 
-$KVM \
+A="mac80211_hwsim.support_p2p_device=0 "
-	-kernel $KERNEL -smp 4 \
+A+="mac80211_hwsim.channels=$CHANNELS "
-	$KVMARGS -m $MEMORY -nographic \
+A+="mac80211_hwsim.radios=7 "
+A+="cfg80211.dyndbg=+p "
+A+="mac80211.dyndbg=+p "
+A+="mac80211_hwsim.dyndbg=+p "
+A+="init=$CMD "
+A+="testdir=$TESTDIR "
+A+="timewarp=$TIMEWARP "
+A+="TELNET=$TELNET_ARG "
+A+="EPATH=$EPATH "
+A+="ARGS=$argsfile "
+A+="console=$KVMOUT "
+A+="ro"
+
+if [ -z $KVM ]; then
+	$KERNEL \
+	     mem=${MEMORY}M \
+	     LOGDIR=$LOGDIR \
+	     $A \
+	     root=none hostfs=/ rootfstype=hostfs rootflags=/ \
+	     ssl0=fd:0,fd:1 \
+	     ssl1=fd:100 \
+	     100<>$LOGDIR/console 2>&1 | \
+	    sed -u '0,/VM has started up/d'
+else
+	$KVM \
+	    -kernel $KERNEL \
+	    -smp 4 \
+	    $KVMARGS \
+	    -m $MEMORY \
+	    -nographic \
 	    -fsdev local,security_model=none,id=fsdev-root,path=/$ROTAG \
 	    -device virtio-9p-pci,id=fs-root,fsdev=fsdev-root,mount_tag=/dev/root \
 	    -fsdev local,security_model=none,id=fsdev-logs,path="$LOGDIR",writeout=immediate \
 	    -device virtio-9p-pci,id=fs-logs,fsdev=fsdev-logs,mount_tag=logshare \
-	-monitor null -serial stdio -serial file:$LOGDIR/console \
+	    -monitor null \
+	    -serial stdio \
+	    -serial file:$LOGDIR/console \
 	    $TELNET_QEMU \
-	-append "mac80211_hwsim.support_p2p_device=0 mac80211_hwsim.channels=$CHANNELS mac80211_hwsim.radios=7 cfg80211.dyndbg=+p mac80211.dyndbg=+p mac80211_hwsim.dyndbg=+p init=$CMD testdir=$TESTDIR timewarp=$TIMEWARP TELNET=$TELNET_ARG console=$KVMOUT root=/dev/root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p EPATH=$EPATH ARGS=$argsfile" | \
+	    -append "$A root=/dev/root rootflags=trans=virtio,version=9p2000.u rootfstype=9p" | \
 	    sed -u '0,/VM has started up/d'
+fi
 
 if [ $CODECOV = "yes" ]; then
     echo "Preparing code coverage reports"