Index: sys/arch/sparc/stand/ofwboot/Locore.c
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc/stand/ofwboot/Locore.c,v
retrieving revision 1.16
diff -u -r1.16 Locore.c
--- sys/arch/sparc/stand/ofwboot/Locore.c	15 Sep 2017 13:25:34 -0000	1.16
+++ sys/arch/sparc/stand/ofwboot/Locore.c	26 Dec 2020 13:26:37 -0000
@@ -306,12 +306,14 @@
 	if (openfirmware(&args) == -1 ||
 	    args.handle == 0)
 		return -1;
+	printf("OF_open(%s) returning %ld\n", dname, args.handle);
 	return args.handle;
 }
 
 void
 OF_close(int handle)
 {
+  printf("OF_close(%u)\n", handle);
 	struct {
 		cell_t name;
 		cell_t nargs;
Index: sys/arch/sparc64/conf/GENERIC
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/conf/GENERIC,v
retrieving revision 1.233
diff -u -r1.233 GENERIC
--- sys/arch/sparc64/conf/GENERIC	30 Oct 2020 06:44:37 -0000	1.233
+++ sys/arch/sparc64/conf/GENERIC	26 Dec 2020 13:26:37 -0000
@@ -247,6 +247,7 @@
 
 # Virtual devices for sun4v systems.
 vrtc0	at vbus?
+vofdisk*	at vbus?
 vdsk*	at cbus?
 
 #### Serial port configuration
Index: sys/arch/sparc64/conf/files.sparc64
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/conf/files.sparc64,v
retrieving revision 1.163
diff -u -r1.163 files.sparc64
--- sys/arch/sparc64/conf/files.sparc64	21 Oct 2020 13:31:52 -0000	1.163
+++ sys/arch/sparc64/conf/files.sparc64	26 Dec 2020 13:26:37 -0000
@@ -332,3 +332,10 @@
 device	vdsk: ldc, scsi
 attach	vdsk at cbus
 file	arch/sparc64/dev/vdsk.c			vdsk
+
+# Virtual of disk
+device	vofdisk: disk
+attach	vofdisk at vbus
+file	arch/sparc64/dev/vofdisk.c		vofdisk needs-flag
+
+
Index: sys/arch/sparc64/conf/majors.sparc64
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/conf/majors.sparc64,v
retrieving revision 1.39
diff -u -r1.39 majors.sparc64
--- sys/arch/sparc64/conf/majors.sparc64	4 Apr 2020 16:06:16 -0000	1.39
+++ sys/arch/sparc64/conf/majors.sparc64	26 Dec 2020 13:26:37 -0000
@@ -119,6 +119,7 @@
 
 device-major	joy		char 137		joy
 #device-major	obsolete	char 138		obsolete (opencrypto)
+device-major	vofdisk		char 140 block 27	vofdisk
 
 # Majors up to 143 are reserved for machine-dependent drivers.
 # New machine-independent driver majors are assigned in 
Index: sys/arch/sparc64/sparc64/autoconf.c
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/sparc64/autoconf.c,v
retrieving revision 1.227
diff -u -r1.227 autoconf.c
--- sys/arch/sparc64/sparc64/autoconf.c	29 Oct 2020 06:47:38 -0000	1.227
+++ sys/arch/sparc64/sparc64/autoconf.c	26 Dec 2020 13:26:37 -0000
@@ -387,6 +387,7 @@
 			return;
 		strcpy(ofbootpath, sbuf);
 	}
+	printf("bootpath: %s\n", ofbootpath);
 	DPRINTF(ACDB_BOOTDEV, ("bootpath: %s\n", ofbootpath));
 	ofbootpackage = prom_finddevice(ofbootpath);
 
@@ -1444,6 +1445,15 @@
 	  }
 	}
 
+	/* More sun4v special stuff - booting from a vdisk (qemu) */
+	if (device_is_a(dev, "vofdisk")) {
+	  booted_device = dev;
+	  DPRINTF(ACDB_BOOTDEV, ("booted_device: %s\n", 
+				 device_xname(dev)));
+	  return;
+	}
+	
+
 }
 
 static void