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1/*
2 * xen-stub.c - stub drivers to reserve space for Xen
3 *
4 * Copyright (C) 2012 Intel Corporation
5 * Author: Liu Jinsong <jinsong.liu@intel.com>
6 * Author: Jiang Yunhong <yunhong.jiang@intel.com>
7 *
8 * Copyright (C) 2012 Oracle Inc
9 * Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 */
22
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/export.h>
26#include <linux/types.h>
27#include <linux/acpi.h>
28#include <xen/acpi.h>
29
30#ifdef CONFIG_ACPI
31
32/*--------------------------------------------
33 stub driver for Xen memory hotplug
34--------------------------------------------*/
35
36static const struct acpi_device_id memory_device_ids[] = {
37 {ACPI_MEMORY_DEVICE_HID, 0},
38 {"", 0},
39};
40
41static struct acpi_driver xen_stub_memory_device_driver = {
42 /* same name as native memory driver to block native loaded */
43 .name = "acpi_memhotplug",
44 .class = ACPI_MEMORY_DEVICE_CLASS,
45 .ids = memory_device_ids,
46};
47
48int xen_stub_memory_device_init(void)
49{
50 if (!xen_initial_domain())
51 return -ENODEV;
52
53 /* just reserve space for Xen, block native driver loaded */
54 return acpi_bus_register_driver(&xen_stub_memory_device_driver);
55}
56EXPORT_SYMBOL_GPL(xen_stub_memory_device_init);
57subsys_initcall(xen_stub_memory_device_init);
58
59void xen_stub_memory_device_exit(void)
60{
61 acpi_bus_unregister_driver(&xen_stub_memory_device_driver);
62}
63EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit);
64
65
66/*--------------------------------------------
67 stub driver for Xen cpu hotplug
68--------------------------------------------*/
69
70static const struct acpi_device_id processor_device_ids[] = {
71 {ACPI_PROCESSOR_OBJECT_HID, 0},
72 {ACPI_PROCESSOR_DEVICE_HID, 0},
73 {"", 0},
74};
75
76static struct acpi_driver xen_stub_processor_driver = {
77 /* same name as native processor driver to block native loaded */
78 .name = "processor",
79 .class = ACPI_PROCESSOR_CLASS,
80 .ids = processor_device_ids,
81};
82
83int xen_stub_processor_init(void)
84{
85 if (!xen_initial_domain())
86 return -ENODEV;
87
88 /* just reserve space for Xen, block native driver loaded */
89 return acpi_bus_register_driver(&xen_stub_processor_driver);
90}
91EXPORT_SYMBOL_GPL(xen_stub_processor_init);
92subsys_initcall(xen_stub_processor_init);
93
94void xen_stub_processor_exit(void)
95{
96 acpi_bus_unregister_driver(&xen_stub_processor_driver);
97}
98EXPORT_SYMBOL_GPL(xen_stub_processor_exit);
99
100#endif
101

Warning: That file was not part of the compilation database. It may have many parsing errors.