runqemu: support virtio drive type

Setting QB_DRIVE_TYPE=/dev/vd selects virtio without triggering any
warnings. Previously, that was only possible by setting an unknown
value and relying on the fallback to virtio, which caused some
warnings to be printed.

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/scripts/runqemu b/scripts/runqemu
index 605bcf25d6db703a12630615161f7b9f0609cdfa..f0ddeea1bf239fc71dec71b7ae2a6e363f63c125 100755 (executable)
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -992,12 +992,15 @@ class BaseConfig(object):
                         logger.info('Using ide drive')
                         vm_drive = "%s,format=%s" % (self.rootfs, rootfs_format)
                     else:
-                        logger.warn("Unknown QB_DRIVE_TYPE: %s" % drive_type)
-
-                if not vm_drive:
-                    logger.warn("Failed to figure out drive type, consider define or fix QB_DRIVE_TYPE")
-                    logger.warn('Trying to use virtio block drive')
-                    vm_drive = '-drive if=virtio,file=%s,format=%s' % (self.rootfs, rootfs_format)
+                        # virtio might have been selected explicitly (just use it), or
+                        # is used as fallback (then warn about that).
+                        if not drive_type.startswith("/dev/vd"):
+                            logger.warn("Unknown QB_DRIVE_TYPE: %s" % drive_type)
+                            logger.warn("Failed to figure out drive type, consider define or fix QB_DRIVE_TYPE")
+                            logger.warn('Trying to use virtio block drive')
+                        vm_drive = '-drive if=virtio,file=%s,format=%s' % (self.rootfs, rootfs_format)
+
+                # All branches above set vm_drive.
                 self.rootfs_options = '%s -no-reboot' % vm_drive
             self.kernel_cmdline = 'root=%s rw highres=off' % (self.get('QB_KERNEL_ROOT'))