1 /* 2 * Xen basic APIC support 3 * 4 * Copyright (c) 2012 Citrix 5 * 6 * Authors: 7 * Wei Liu <wei.liu2@citrix.com> 8 * 9 * This work is licensed under the terms of the GNU GPL version 2 or 10 * later. See the COPYING file in the top-level directory. 11 */ 12 #include "qemu/osdep.h" 13 #include "hw/i386/apic_internal.h" 14 #include "hw/pci/msi.h" 15 #include "hw/xen/xen.h" 16 17 static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr, 18 unsigned size) 19 { 20 return ~(uint64_t)0; 21 } 22 23 static void xen_apic_mem_write(void *opaque, hwaddr addr, 24 uint64_t data, unsigned size) 25 { 26 if (size != sizeof(uint32_t)) { 27 fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size); 28 return; 29 } 30 31 xen_hvm_inject_msi(addr, data); 32 } 33 34 static const MemoryRegionOps xen_apic_io_ops = { 35 .read = xen_apic_mem_read, 36 .write = xen_apic_mem_write, 37 .endianness = DEVICE_NATIVE_ENDIAN, 38 }; 39 40 static void xen_apic_realize(DeviceState *dev, Error **errp) 41 { 42 APICCommonState *s = APIC_COMMON(dev); 43 44 s->vapic_control = 0; 45 memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s, 46 "xen-apic-msi", APIC_SPACE_SIZE); 47 msi_supported = true; 48 } 49 50 static void xen_apic_set_base(APICCommonState *s, uint64_t val) 51 { 52 } 53 54 static void xen_apic_set_tpr(APICCommonState *s, uint8_t val) 55 { 56 } 57 58 static uint8_t xen_apic_get_tpr(APICCommonState *s) 59 { 60 return 0; 61 } 62 63 static void xen_apic_vapic_base_update(APICCommonState *s) 64 { 65 } 66 67 static void xen_apic_external_nmi(APICCommonState *s) 68 { 69 } 70 71 static void xen_apic_class_init(ObjectClass *klass, void *data) 72 { 73 APICCommonClass *k = APIC_COMMON_CLASS(klass); 74 75 k->realize = xen_apic_realize; 76 k->set_base = xen_apic_set_base; 77 k->set_tpr = xen_apic_set_tpr; 78 k->get_tpr = xen_apic_get_tpr; 79 k->vapic_base_update = xen_apic_vapic_base_update; 80 k->external_nmi = xen_apic_external_nmi; 81 } 82 83 static const TypeInfo xen_apic_info = { 84 .name = "xen-apic", 85 .parent = TYPE_APIC_COMMON, 86 .instance_size = sizeof(APICCommonState), 87 .class_init = xen_apic_class_init, 88 }; 89 90 static void xen_apic_register_types(void) 91 { 92 type_register_static(&xen_apic_info); 93 } 94 95 type_init(xen_apic_register_types) 96