Introduce a Xen specific nexus that is going to be in charge for
attaching Xen specific devices.
---
 sys/conf/files.amd64          |    1 +
 sys/conf/files.i386           |    1 +
 sys/dev/xen/console/console.c |    2 +-
 sys/dev/xen/timer/timer.c     |    4 +-
 sys/dev/xen/xenpci/xenpci.c   |    4 ++
 sys/x86/xen/xen_nexus.c       |   82 +++++++++++++++++++++++++++++++++++++++++
 sys/x86/xen/xenpv.c           |    1 +
 sys/xen/xenstore/xenstore.c   |    6 +--
 8 files changed, 93 insertions(+), 8 deletions(-)
 create mode 100644 sys/x86/xen/xen_nexus.c

diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
index d7c98cc..f378983 100644
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -571,3 +571,4 @@ x86/xen/xen_intr.c          optional        xen | xenhvm
 x86/xen/pv.c                   optional        xenhvm
 x86/xen/pvcpu_enum.c           optional        xenhvm
 x86/xen/xenpv.c                        optional        xenhvm
+x86/xen/xen_nexus.c            optional        xenhvm
diff --git a/sys/conf/files.i386 b/sys/conf/files.i386
index 81142e3..02887a33 100644
--- a/sys/conf/files.i386
+++ b/sys/conf/files.i386
@@ -604,3 +604,4 @@ x86/x86/delay.c                     standard
 x86/xen/hvm.c                  optional xenhvm
 x86/xen/xen_intr.c             optional xen | xenhvm
 x86/xen/xenpv.c                        optional xen | xenhvm
+x86/xen/xen_nexus.c            optional xen | xenhvm
diff --git a/sys/dev/xen/console/console.c b/sys/dev/xen/console/console.c
index 899dffc..91538fe 100644
--- a/sys/dev/xen/console/console.c
+++ b/sys/dev/xen/console/console.c
@@ -462,4 +462,4 @@ xcons_force_flush(void)
        }
 }
 
-DRIVER_MODULE(xc, nexus, xc_driver, xc_devclass, 0, 0);
+DRIVER_MODULE(xc, xenpv, xc_driver, xc_devclass, 0, 0);
diff --git a/sys/dev/xen/timer/timer.c b/sys/dev/xen/timer/timer.c
index 96372ab..f16f5a5 100644
--- a/sys/dev/xen/timer/timer.c
+++ b/sys/dev/xen/timer/timer.c
@@ -636,5 +636,5 @@ static driver_t xentimer_driver = {
        sizeof(struct xentimer_softc),
 };
 
-DRIVER_MODULE(xentimer, nexus, xentimer_driver, xentimer_devclass, 0, 0);
-MODULE_DEPEND(xentimer, nexus, 1, 1, 1);
+DRIVER_MODULE(xentimer, xenpv, xentimer_driver, xentimer_devclass, 0, 0);
+MODULE_DEPEND(xentimer, xenpv, 1, 1, 1);
diff --git a/sys/dev/xen/xenpci/xenpci.c b/sys/dev/xen/xenpci/xenpci.c
index dd2ad92..a27b54f 100644
--- a/sys/dev/xen/xenpci/xenpci.c
+++ b/sys/dev/xen/xenpci/xenpci.c
@@ -270,6 +270,10 @@ xenpci_attach(device_t dev)
                goto errexit;
        }
 
+       /* Add the xenpv device so top level Xen devices can attach */
+       if (BUS_ADD_CHILD(dev, 0, "xenpv", 0) == NULL)
+               panic("xenpci: unable to add xenpv device");
+
        return (bus_generic_attach(dev));
 
 errexit:
diff --git a/sys/x86/xen/xen_nexus.c b/sys/x86/xen/xen_nexus.c
new file mode 100644
index 0000000..d34e333
--- /dev/null
+++ b/sys/x86/xen/xen_nexus.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013 Roger Pau Monné <roger....@citrix.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+#include <sys/smp.h>
+
+#include <machine/nexusvar.h>
+
+#include <xen/xen-os.h>
+
+/*
+ * Xen nexus(4) driver.
+ */
+static int
+nexus_xen_probe(device_t dev)
+{
+       if (!xen_pv_domain())
+               return (ENXIO);
+
+       return (BUS_PROBE_DEFAULT);
+}
+
+static int
+nexus_xen_attach(device_t dev)
+{
+
+       nexus_init_resources();
+       bus_generic_probe(dev);
+
+       /*
+        * Explicitly add the xenpv device here. Other top level
+        * Xen devices will attach to this.
+        */
+       if (BUS_ADD_CHILD(dev, 0, "xenpv", 0) == NULL)
+               panic("xenpv: could not attach");
+       bus_generic_attach(dev);
+       return 0;
+}
+
+static device_method_t nexus_xen_methods[] = {
+       /* Device interface */
+       DEVMETHOD(device_probe,         nexus_xen_probe),
+       DEVMETHOD(device_attach,        nexus_xen_attach),
+
+       { 0, 0 }
+};
+
+DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver);
+static devclass_t nexus_devclass;
+
+DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0);
diff --git a/sys/x86/xen/xenpv.c b/sys/x86/xen/xenpv.c
index 41d674f..7bd810b 100644
--- a/sys/x86/xen/xenpv.c
+++ b/sys/x86/xen/xenpv.c
@@ -90,6 +90,7 @@ static driver_t xenpv_driver = {
 static devclass_t xenpv_devclass;
 
 DRIVER_MODULE(xenpv, nexus, xenpv_driver, xenpv_devclass, 0, 0);
+DRIVER_MODULE(xenpv, xenpci, xenpv_driver, xenpv_devclass, 0, 0);
 
 /*
  * Dummy Xen cpu device
diff --git a/sys/xen/xenstore/xenstore.c b/sys/xen/xenstore/xenstore.c
index d404862..b5cf413 100644
--- a/sys/xen/xenstore/xenstore.c
+++ b/sys/xen/xenstore/xenstore.c
@@ -1261,11 +1261,7 @@ static device_method_t xenstore_methods[] = {
 DEFINE_CLASS_0(xenstore, xenstore_driver, xenstore_methods, 0);
 static devclass_t xenstore_devclass; 
  
-#ifdef XENHVM
-DRIVER_MODULE(xenstore, xenpci, xenstore_driver, xenstore_devclass, 0, 0);
-#else
-DRIVER_MODULE(xenstore, nexus, xenstore_driver, xenstore_devclass, 0, 0);
-#endif
+DRIVER_MODULE(xenstore, xenpv, xenstore_driver, xenstore_devclass, 0, 0);
 
 /*------------------------------- Sysctl Data 
--------------------------------*/
 /* XXX Shouldn't the node be somewhere else? */
-- 
1.7.7.5 (Apple Git-26)

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