ci: Add virtio-fs support

Add configuration option to use virtio-fs.
We will currently use nemu for testing the
virtio-fs support.

Depends-on: github.com/kata-containers/runtime#1016
Depends-on: github.com/kata-containers/packaging#484

Fixes: kata-containers#1536.

Signed-off-by: Salvador Fuentes <salvador.fuentes@intel.com>

Author: chavafg

.ci/install_nemu.sh

@@ -31,9 +31,14 @@ install_nemu() {
 		;;
 	esac
 
+	local virtiofs_bin="virtiofsd-${arch}"
+
 	curl -LO "${nemu_repo}/releases/download/${nemu_version}/${nemu_bin}"
+	curl -LO "${nemu_repo}/releases/download/${nemu_version}/${virtiofs_bin}"
+
 	sudo install -o root -g root -m 0755 "${nemu_bin}" "/usr/local/bin"
-	rm -rf "${nemu_bin}"
+	sudo install -o root -g root -m 0755 "${virtiofs_bin}" "/usr/local/bin"
+	rm -rf "${nemu_bin}" "${virtiofs_bin}"
 }
 
 install_firmware() {

.ci/install_runtime.sh

@@ -121,3 +121,14 @@ if [ "$KATA_EXPERIMENTAL_FEATURES" = true ]; then
 	feature="newstore"
 	sudo sed -i -e "s|^experimental.*$|experimental=[ \"$feature\" ]|" "${runtime_config_path}"
 fi
+
+# Enable virtiofs if VIRTIO_FS is set to true
+# currently we use nemu for virtiofs testing
+if [ "$VIRTIO_FS" = true ] && [ "$KATA_HYPERVISOR" = "nemu" ]; then
+	echo "Configure virtio-fs on kata-runtime config file"
+	sudo crudini --set "$runtime_config_path" hypervisor.qemu virtio_fs_daemon "\"/usr/local/bin/virtiofsd-${arch}\""
+	sudo crudini --set "$runtime_config_path" hypervisor.qemu shared_fs "\"virtio-fs\""
+	sudo crudini --set "$runtime_config_path" hypervisor.qemu enable_hugepages "true"
+	
+	sudo sysctl -w vm.nr_hugepages=1024
+fi