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xen/stub: driver for CPU hotplug 

Add Xen stub driver for CPU hotplug, early occupy to block native,
will be replaced later by real Xen processor driver module.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
hifive-unleashed-5.1
Liu Jinsong 2013-01-24 22:12:30 +08:00 committed by Konrad Rzeszutek Wilk
parent ef92e7caf9
commit b22ff77b82
2 changed files with 44 additions and 2 deletions
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39
drivers/xen/xen-stub.c
View File

@ -28,12 +28,12 @@
#include <acpi/acpi_drivers.h>
#include <xen/acpi.h>
#ifdef CONFIG_ACPI
/*--------------------------------------------
stub driver for Xen memory hotplug
--------------------------------------------*/
#ifdef CONFIG_ACPI
static const struct acpi_device_id memory_device_ids[] = {
{ACPI_MEMORY_DEVICE_HID, 0},
{"", 0},
@ -63,4 +63,39 @@ void xen_stub_memory_device_exit(void)
}
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

7
include/xen/acpi.h
View File

@ -47,6 +47,13 @@
int xen_stub_memory_device_init(void);
void xen_stub_memory_device_exit(void);
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
int xen_stub_processor_init(void);
void xen_stub_processor_exit(void);
int xen_acpi_notify_hypervisor_state(u8 sleep_state,
u32 pm1a_cnt, u32 pm1b_cnd);