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Commit b22ff77b authored by Liu Jinsong's avatar Liu Jinsong Committed by Konrad Rzeszutek Wilk
Browse files

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: default avatarLiu Jinsong <jinsong.liu@intel.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent ef92e7ca

drivers/xen/xen-stub.c

+37 −2
Original line number Diff line number Diff line
@@ -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

include/xen/acpi.h

+7 −0
Original line number Diff line number Diff line
@@ -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);