diff -r 703ced548925 config/StdGNU.mk
--- a/config/StdGNU.mk	Fri Jun 19 08:45:55 2009 +0100
+++ b/config/StdGNU.mk	Mon Jun 22 14:59:12 2009 +0200
@@ -36,6 +36,7 @@ MANDIR = $(SHAREDIR)/man
 MAN1DIR = $(MANDIR)/man1
 MAN8DIR = $(MANDIR)/man8
 SBINDIR = $(PREFIX)/sbin
+XENFIRMWAREDIR = $(LIBDIR_x86_32)/xen/boot
 
 PRIVATE_PREFIX = $(LIBDIR)/xen
 PRIVATE_BINDIR = $(PRIVATE_PREFIX)/bin
diff -r 703ced548925 config/SunOS.mk
--- a/config/SunOS.mk	Fri Jun 19 08:45:55 2009 +0100
+++ b/config/SunOS.mk	Mon Jun 22 14:59:12 2009 +0200
@@ -30,6 +30,7 @@ MANDIR = $(PREFIX)/share/man
 MAN1DIR = $(MANDIR)/man1
 MAN8DIR = $(MANDIR)/man8
 SBINDIR = $(PREFIX)/sbin
+XENFIRMWAREDIR = $(LIBDIR)/xen/boot
 
 PRIVATE_PREFIX = $(LIBDIR)/xen
 PRIVATE_BINDIR = $(PRIVATE_PREFIX)/bin
diff -r 703ced548925 tools/firmware/Makefile
--- a/tools/firmware/Makefile	Fri Jun 19 08:45:55 2009 +0100
+++ b/tools/firmware/Makefile	Mon Jun 22 14:59:12 2009 +0200
@@ -3,7 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 # hvmloader is a 32-bit protected mode binary.
 TARGET      := hvmloader/hvmloader
-INST_DIR := $(DESTDIR)$(LIBDIR_x86_32)/xen/boot
+INST_DIR := $(DESTDIR)$(XENFIRMWAREDIR)
 
 SUBDIRS :=
 SUBDIRS += rombios
diff -r 703ced548925 tools/python/Makefile
--- a/tools/python/Makefile	Fri Jun 19 08:45:55 2009 +0100
+++ b/tools/python/Makefile	Mon Jun 22 14:59:12 2009 +0200
@@ -13,19 +13,20 @@ POTFILE := $(PODIR)/xen-xm.pot
 I18NSRCFILES = $(shell find xen/xm/ -name '*.py')
 CATALOGS = $(patsubst %,xen/xm/messages/%.mo,$(LINGUAS))
 NLSDIR = $(SHAREDIR)/locale
-xenpath = "xen/util/path.py"
+XENPATH = "xen/util/path.py"
   
 .PHONY: build buildpy genpath
 genpath:
-	rm -f ${xenpath}
-	echo "SBINDIR=\"$(SBINDIR)\"" >> ${xenpath}
-	echo "BINDIR=\"$(BINDIR)\"" >> ${xenpath}
-	echo "LIBEXEC=\"$(LIBEXEC)\"" >> ${xenpath}
-	echo "LIBDIR=\"$(LIBDIR)\"" >> ${xenpath}
-	echo "SHAREDIR=\"$(SHAREDIR)\"" >> ${xenpath}
-	echo "PRIVATE_BINDIR=\"$(PRIVATE_BINDIR)\"" >> ${xenpath}
-	echo "XEN_CONFIG_DIR=\"$(XEN_CONFIG_DIR)\"" >> ${xenpath}
-	echo "XEN_SCRIPT_DIR=\"$(XEN_SCRIPT_DIR)\"" >> ${xenpath}
+	rm -f $(XENPATH)
+	echo "SBINDIR=\"$(SBINDIR)\"" >> $(XENPATH)
+	echo "BINDIR=\"$(BINDIR)\"" >> $(XENPATH)
+	echo "LIBEXEC=\"$(LIBEXEC)\"" >> $(XENPATH)
+	echo "LIBDIR=\"$(LIBDIR)\"" >> $(XENPATH)
+	echo "SHAREDIR=\"$(SHAREDIR)\"" >> $(XENPATH)
+	echo "PRIVATE_BINDIR=\"$(PRIVATE_BINDIR)\"" >> $(XENPATH)
+	echo "XENFIRMWAREDIR=\"$(XENFIRMWAREDIR)\"" >> $(XENPATH)
+	echo "XEN_CONFIG_DIR=\"$(XEN_CONFIG_DIR)\"" >> $(XENPATH)
+	echo "XEN_SCRIPT_DIR=\"$(XEN_SCRIPT_DIR)\"" >> $(XENPATH)
 
 buildpy: genpath 
 	CC="$(CC)" CFLAGS="$(CFLAGS)" $(PYTHON) setup.py build
@@ -91,6 +92,7 @@ test:
 
 .PHONY: clean
 clean:
+	rm -f $(XENPATH)
 	rm -rf build *.pyc *.pyo *.o *.a *~ $(CATALOGS) xen/util/auxbin.pyc
 	rm -f $(DEPS)
 
diff -r 703ced548925 tools/python/xen/util/auxbin.py
--- a/tools/python/xen/util/auxbin.py	Fri Jun 19 08:45:55 2009 +0100
+++ b/tools/python/xen/util/auxbin.py	Mon Jun 22 14:59:12 2009 +0200
@@ -19,8 +19,7 @@
 import os
 import os.path
 import sys
-from xen.util.path import SBINDIR,BINDIR,LIBEXEC,LIBDIR,PRIVATE_BINDIR
-from xen.util.path import XEN_CONFIG_DIR, XEN_SCRIPT_DIR
+from xen.util.path import *
 
 def execute(exe, args = None):
     exepath = pathTo(exe)
@@ -33,7 +32,7 @@ def execute(exe, args = None):
         print exepath, ": ", exn
         sys.exit(1)
 
-SEARCHDIRS = [ BINDIR, SBINDIR, LIBEXEC, PRIVATE_BINDIR ]
+SEARCHDIRS = [ BINDIR, SBINDIR, LIBEXEC, PRIVATE_BINDIR, XENFIRMWAREDIR ]
 def pathTo(exebin):
     for dir in SEARCHDIRS:
         exe = os.path.join(dir, exebin)
diff -r 703ced548925 tools/python/xen/xend/XendConfig.py
--- a/tools/python/xen/xend/XendConfig.py	Fri Jun 19 08:45:55 2009 +0100
+++ b/tools/python/xen/xend/XendConfig.py	Mon Jun 22 14:59:12 2009 +0200
@@ -16,6 +16,7 @@
 #============================================================================
 
 import logging
+import os
 import re
 import time
 import types
@@ -39,7 +40,7 @@ from xen.util.blkif import blkdev_name_t
 from xen.util.pci import pci_opts_list_from_sxp, pci_convert_sxp_to_dict
 from xen.xend.XendSXPDev import dev_dict_to_sxp
 from xen.util import xsconstants
-import xen.util.auxbin
+from xen.util import auxbin
 
 log = logging.getLogger("xend.XendConfig")
 log.setLevel(logging.WARN)
@@ -460,7 +461,11 @@ class XendConfig(dict):
 
         if self.is_hvm() or self.has_rfb():
             if 'device_model' not in self['platform']:
-                self['platform']['device_model'] = xen.util.auxbin.pathTo("qemu-dm")
+                self['platform']['device_model'] = auxbin.pathTo("qemu-dm")
+            # device_model may be set to 'qemu-dm' or 'stubdom-dm' w/o a path
+            if os.path.dirname(self['platform']['device_model']) != "":
+                self['platform']['device_model'] = \
+                    auxbin.pathTo(self['platform']['device_model'])
 
         if self.is_hvm():
             if 'timer_mode' not in self['platform']:
@@ -478,11 +483,17 @@ class XendConfig(dict):
             if 'loader' not in self['platform']:
                 # Old configs may have hvmloader set as PV_kernel param
                 if self.has_key('PV_kernel') and self['PV_kernel'] != '':
+                    if self['PV_kernel'] == 'hvmloader':
+                        self['PV_kernel'] = auxbin.pathTo("hvmloader")
                     self['platform']['loader'] = self['PV_kernel']
                     self['PV_kernel'] = ''
                 else:
-                    self['platform']['loader'] = "/usr/lib/xen/boot/hvmloader"
+                    self['platform']['loader'] = auxbin.pathTo("hvmloader")
                 log.debug("Loader is %s" % str(self['platform']['loader']))
+            elif self['platform']['loader'] == 'hvmloader':
+                self['platform']['loader'] = auxbin.pathTo("hvmloader")
+            if not os.path.exists(self['platform']['loader']):
+                raise VmError("kernel '%s' not found" % str(self['platform']['loader']))
 
             # Compatibility hack, can go away soon.
             if 'soundhw' not in self['platform'] and \
@@ -1549,7 +1560,7 @@ class XendConfig(dict):
                     # is invoked for pvfb services
                     if 'device_model' not in target['platform']:
                         target['platform']['device_model'] = \
-                            xen.util.auxbin.pathTo("qemu-dm")
+                            auxbin.pathTo("qemu-dm")
 
                     # Finally, if we are a pvfb, we need to make a vkbd
                     # as well that is not really exposed to Xen API
diff -r 703ced548925 tools/python/xen/xm/create.py
--- a/tools/python/xen/xm/create.py	Fri Jun 19 08:45:55 2009 +0100
+++ b/tools/python/xen/xm/create.py	Mon Jun 22 14:59:12 2009 +0200
@@ -653,11 +653,39 @@ def configure_image(vals):
         return None
     config_image = [ vals.builder ]
     if vals.kernel:
-        config_image.append([ 'kernel', os.path.abspath(vals.kernel) ])
+        if os.path.dirname(vals.kernel) != "" and os.path.exists(vals.kernel):
+            config_image.append([ 'kernel', vals.kernel ])
+        elif vals.kernel == 'hvmloader':
+            # Keep hvmloader w/o a path and let xend find it.
+            # This allows guest migration to a Dom0 having different
+            # xen install pathes.
+            config_image.append([ 'kernel', vals.kernel ])
+        elif os.path.exists(os.path.abspath(vals.kernel))
+            # Keep old behaviour, if path is valid.
+            config_image.append([ 'kernel', os.path.abspath(vals.kernel) ])
+        else:
+            raise ValueError('Cannot find kernel "%s"' % vals.kernel)
     if vals.ramdisk:
-        config_image.append([ 'ramdisk', os.path.abspath(vals.ramdisk) ])
+        if os.path.dirname(vals.ramdisk) != "" and os.path.exists(vals.ramdisk):
+            config_image.append([ 'ramdisk', vals.ramdisk ])
+        elif os.path.exists(os.path.abspath(vals.ramdisk)):
+            # Keep old behaviour, if path is valid.
+            config_image.append([ 'ramdisk', os.path.abspath(vals.ramdisk) ])
+        else:
+            raise ValueError('Cannot find ramdisk "%s"' % vals.ramdisk)
     if vals.loader:
-        config_image.append([ 'loader', os.path.abspath(vals.loader) ])
+        if os.path.dirname(vals.loader) != "" and os.path.exists(vals.loader):
+            config_image.append([ 'loader', vals.loader ])
+        elif vals.loader == 'hvmloader':
+            # Keep hvmloader w/o a path and let xend find it.
+            # This allows guest migration to a Dom0 having different
+            # xen install pathes.
+            config_image.append([ 'loader', vals.loader ])
+        elif os.path.exists(os.path.abspath(vals.loader)):
+            # Keep old behaviour, if path is valid.
+            config_image.append([ 'loader', os.path.abspath(vals.loader) ])
+        else:
+            raise ValueError('Cannot find loader "%s"' % vals.loader)
     if vals.cmdline_ip:
         cmdline_ip = strip('ip=', vals.cmdline_ip)
         config_image.append(['ip', cmdline_ip])