2 * Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
38 #include <xen/xen-os.h>
41 * Dummy Xen cpu device
43 * Since there's no ACPI on PVH guests, we need to create a dummy
44 * CPU device in order to fill the pcpu->pc_device field.
48 xenpvcpu_identify(driver_t *driver, device_t parent)
52 /* Only attach in case the per-CPU device is not set. */
53 if (!xen_domain() || PCPU_GET(device) != NULL)
57 if (BUS_ADD_CHILD(parent, 0, "pvcpu", i) == NULL)
58 panic("Unable to add Xen PV CPU device.");
63 xenpvcpu_probe(device_t dev)
66 device_set_desc(dev, "Xen PV CPU");
67 return (BUS_PROBE_NOWILDCARD);
71 xenpvcpu_attach(device_t dev)
76 cpu = device_get_unit(dev);
82 static device_method_t xenpvcpu_methods[] = {
83 DEVMETHOD(device_identify, xenpvcpu_identify),
84 DEVMETHOD(device_probe, xenpvcpu_probe),
85 DEVMETHOD(device_attach, xenpvcpu_attach),
90 static driver_t xenpvcpu_driver = {
96 devclass_t xenpvcpu_devclass;
98 DRIVER_MODULE(xenpvcpu, xenpv, xenpvcpu_driver, xenpvcpu_devclass, 0, 0);
99 MODULE_DEPEND(xenpvcpu, xenpv, 1, 1, 1);