91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* xen-stub.c - stub drivers to reserve space for Xen
|
|
*
|
|
* Copyright (C) 2012 Intel Corporation
|
|
* Author: Liu Jinsong <jinsong.liu@intel.com>
|
|
* Author: Jiang Yunhong <yunhong.jiang@intel.com>
|
|
*
|
|
* Copyright (C) 2012 Oracle Inc
|
|
* Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/export.h>
|
|
#include <linux/types.h>
|
|
#include <linux/acpi.h>
|
|
#include <xen/acpi.h>
|
|
|
|
#ifdef CONFIG_ACPI
|
|
|
|
/*--------------------------------------------
|
|
stub driver for Xen memory hotplug
|
|
--------------------------------------------*/
|
|
|
|
static const struct acpi_device_id memory_device_ids[] = {
|
|
{ACPI_MEMORY_DEVICE_HID, 0},
|
|
{"", 0},
|
|
};
|
|
|
|
static struct acpi_driver xen_stub_memory_device_driver = {
|
|
/* same name as native memory driver to block native loaded */
|
|
.name = "acpi_memhotplug",
|
|
.class = ACPI_MEMORY_DEVICE_CLASS,
|
|
.ids = memory_device_ids,
|
|
};
|
|
|
|
int xen_stub_memory_device_init(void)
|
|
{
|
|
if (!xen_initial_domain())
|
|
return -ENODEV;
|
|
|
|
/* just reserve space for Xen, block native driver loaded */
|
|
return acpi_bus_register_driver(&xen_stub_memory_device_driver);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_stub_memory_device_init);
|
|
subsys_initcall(xen_stub_memory_device_init);
|
|
|
|
void xen_stub_memory_device_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&xen_stub_memory_device_driver);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit);
|
|
|
|
|
|
/*--------------------------------------------
|
|
stub driver for Xen cpu hotplug
|
|
--------------------------------------------*/
|
|
|
|
static const struct acpi_device_id processor_device_ids[] = {
|
|
{ACPI_PROCESSOR_OBJECT_HID, 0},
|
|
{ACPI_PROCESSOR_DEVICE_HID, 0},
|
|
{"", 0},
|
|
};
|
|
|
|
static struct acpi_driver xen_stub_processor_driver = {
|
|
/* same name as native processor driver to block native loaded */
|
|
.name = "processor",
|
|
.class = ACPI_PROCESSOR_CLASS,
|
|
.ids = processor_device_ids,
|
|
};
|
|
|
|
int xen_stub_processor_init(void)
|
|
{
|
|
if (!xen_initial_domain())
|
|
return -ENODEV;
|
|
|
|
/* just reserve space for Xen, block native driver loaded */
|
|
return acpi_bus_register_driver(&xen_stub_processor_driver);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_stub_processor_init);
|
|
subsys_initcall(xen_stub_processor_init);
|
|
|
|
void xen_stub_processor_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&xen_stub_processor_driver);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_stub_processor_exit);
|
|
|
|
#endif
|