projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| dcb93b96 LJ |
1 | /* |
| 2 | * xen-stub.c - stub drivers to reserve space for Xen | |
| 3 | * | |
| 4 | * Copyright (C) 2012 Intel Corporation | |
| 5 | * Author: Liu Jinsong <[email protected]> | |
| 6 | * Author: Jiang Yunhong <[email protected]> | |
| 7 | * | |
| 8 | * Copyright (C) 2012 Oracle Inc | |
| 9 | * Author: Konrad Rzeszutek Wilk <[email protected]> | |
| 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> | |
| dcb93b96 LJ |
28 | #include <xen/acpi.h> |
| 29 | ||
| b22ff77b LJ |
30 | #ifdef CONFIG_ACPI |
| 31 | ||
| dcb93b96 LJ |
32 | /*-------------------------------------------- |
| 33 | stub driver for Xen memory hotplug | |
| 34 | --------------------------------------------*/ | |
| 35 | ||
| dcb93b96 LJ |
36 | static const struct acpi_device_id memory_device_ids[] = { |
| 37 | {ACPI_MEMORY_DEVICE_HID, 0}, | |
| 38 | {"", 0}, | |
| 39 | }; | |
| 40 | ||
| 41 | static 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 | ||
| 48 | int 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 | } | |
| 56 | EXPORT_SYMBOL_GPL(xen_stub_memory_device_init); | |
| 57 | subsys_initcall(xen_stub_memory_device_init); | |
| 58 | ||
| 59 | void xen_stub_memory_device_exit(void) | |
| 60 | { | |
| 61 | acpi_bus_unregister_driver(&xen_stub_memory_device_driver); | |
| 62 | } | |
| 63 | EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit); | |
| 64 | ||
| b22ff77b LJ |
65 | |
| 66 | /*-------------------------------------------- | |
| 67 | stub driver for Xen cpu hotplug | |
| 68 | --------------------------------------------*/ | |
| 69 | ||
| 70 | static const struct acpi_device_id processor_device_ids[] = { | |
| 71 | {ACPI_PROCESSOR_OBJECT_HID, 0}, | |
| 72 | {ACPI_PROCESSOR_DEVICE_HID, 0}, | |
| 73 | {"", 0}, | |
| 74 | }; | |
| 75 | ||
| 76 | static 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 | ||
| 83 | int 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 | } | |
| 91 | EXPORT_SYMBOL_GPL(xen_stub_processor_init); | |
| 92 | subsys_initcall(xen_stub_processor_init); | |
| 93 | ||
| 94 | void xen_stub_processor_exit(void) | |
| 95 | { | |
| 96 | acpi_bus_unregister_driver(&xen_stub_processor_driver); | |
| 97 | } | |
| 98 | EXPORT_SYMBOL_GPL(xen_stub_processor_exit); | |
| 99 | ||
| dcb93b96 | 100 | #endif |