^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * xen-stub.c - stub drivers to reserve space for Xen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2012 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Liu Jinsong <jinsong.liu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Jiang Yunhong <yunhong.jiang@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2012 Oracle Inc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <xen/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*--------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) stub driver for Xen memory hotplug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) --------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct acpi_device_id memory_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {ACPI_MEMORY_DEVICE_HID, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct acpi_driver xen_stub_memory_device_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* same name as native memory driver to block native loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .name = "acpi_memhotplug",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .class = ACPI_MEMORY_DEVICE_CLASS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .ids = memory_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int xen_stub_memory_device_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (!xen_initial_domain())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* just reserve space for Xen, block native driver loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return acpi_bus_register_driver(&xen_stub_memory_device_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) EXPORT_SYMBOL_GPL(xen_stub_memory_device_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) subsys_initcall(xen_stub_memory_device_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) void xen_stub_memory_device_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) acpi_bus_unregister_driver(&xen_stub_memory_device_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*--------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) stub driver for Xen cpu hotplug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) --------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const struct acpi_device_id processor_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {ACPI_PROCESSOR_OBJECT_HID, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {ACPI_PROCESSOR_DEVICE_HID, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static struct acpi_driver xen_stub_processor_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* same name as native processor driver to block native loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .name = "processor",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .class = ACPI_PROCESSOR_CLASS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .ids = processor_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int xen_stub_processor_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!xen_initial_domain())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* just reserve space for Xen, block native driver loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return acpi_bus_register_driver(&xen_stub_processor_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) EXPORT_SYMBOL_GPL(xen_stub_processor_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) subsys_initcall(xen_stub_processor_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void xen_stub_processor_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) acpi_bus_unregister_driver(&xen_stub_processor_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) EXPORT_SYMBOL_GPL(xen_stub_processor_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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