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>
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@ -28,12 +28,12 @@
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#include <acpi/acpi_drivers.h>
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#include <xen/acpi.h>
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#ifdef CONFIG_ACPI
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/*--------------------------------------------
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stub driver for Xen memory hotplug
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--------------------------------------------*/
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id memory_device_ids[] = {
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{ACPI_MEMORY_DEVICE_HID, 0},
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{"", 0},
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@ -63,4 +63,39 @@ void xen_stub_memory_device_exit(void)
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}
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EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit);
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/*--------------------------------------------
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stub driver for Xen cpu hotplug
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--------------------------------------------*/
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static const struct acpi_device_id processor_device_ids[] = {
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{ACPI_PROCESSOR_OBJECT_HID, 0},
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{ACPI_PROCESSOR_DEVICE_HID, 0},
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{"", 0},
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};
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static struct acpi_driver xen_stub_processor_driver = {
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/* same name as native processor driver to block native loaded */
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.name = "processor",
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.class = ACPI_PROCESSOR_CLASS,
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.ids = processor_device_ids,
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};
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int xen_stub_processor_init(void)
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{
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if (!xen_initial_domain())
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return -ENODEV;
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/* just reserve space for Xen, block native driver loaded */
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return acpi_bus_register_driver(&xen_stub_processor_driver);
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}
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EXPORT_SYMBOL_GPL(xen_stub_processor_init);
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subsys_initcall(xen_stub_processor_init);
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void xen_stub_processor_exit(void)
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{
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acpi_bus_unregister_driver(&xen_stub_processor_driver);
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}
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EXPORT_SYMBOL_GPL(xen_stub_processor_exit);
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#endif
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@ -47,6 +47,13 @@
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int xen_stub_memory_device_init(void);
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void xen_stub_memory_device_exit(void);
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#define ACPI_PROCESSOR_CLASS "processor"
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#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
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#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
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int xen_stub_processor_init(void);
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void xen_stub_processor_exit(void);
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int xen_acpi_notify_hypervisor_state(u8 sleep_state,
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u32 pm1a_cnt, u32 pm1b_cnd);
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