projects / linux-2.6-block.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 <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 <acpi/acpi_drivers.h> | |
| 29 | #include <xen/acpi.h> | |
| 30 | ||
| 31 | /*-------------------------------------------- | |
| 32 | stub driver for Xen memory hotplug | |
| 33 | --------------------------------------------*/ | |
| 34 | ||
| 35 | #ifdef CONFIG_ACPI | |
| 36 | ||
| 37 | static const struct acpi_device_id memory_device_ids[] = { | |
| 38 | {ACPI_MEMORY_DEVICE_HID, 0}, | |
| 39 | {"", 0}, | |
| 40 | }; | |
| 41 | ||
| 42 | static struct acpi_driver xen_stub_memory_device_driver = { | |
| 43 | /* same name as native memory driver to block native loaded */ | |
| 44 | .name = "acpi_memhotplug", | |
| 45 | .class = ACPI_MEMORY_DEVICE_CLASS, | |
| 46 | .ids = memory_device_ids, | |
| 47 | }; | |
| 48 | ||
| 49 | int xen_stub_memory_device_init(void) | |
| 50 | { | |
| 51 | if (!xen_initial_domain()) | |
| 52 | return -ENODEV; | |
| 53 | ||
| 54 | /* just reserve space for Xen, block native driver loaded */ | |
| 55 | return acpi_bus_register_driver(&xen_stub_memory_device_driver); | |
| 56 | } | |
| 57 | EXPORT_SYMBOL_GPL(xen_stub_memory_device_init); | |
| 58 | subsys_initcall(xen_stub_memory_device_init); | |
| 59 | ||
| 60 | void xen_stub_memory_device_exit(void) | |
| 61 | { | |
| 62 | acpi_bus_unregister_driver(&xen_stub_memory_device_driver); | |
| 63 | } | |
| 64 | EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit); | |
| 65 | ||
| 66 | #endif |