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 13 #include "qemu/osdep.h" 14 #include "hw/i386/apic_internal.h" 15 #include "hw/pci/msi.h" 16 #include "hw/xen/xen.h" 17 #include "qemu/module.h" 18 19 static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr, 20 unsigned size) 21 { 22 return ~(uint64_t)0; 23 } 24 25 static void xen_apic_mem_write(void *opaque, hwaddr addr, 26 uint64_t data, unsigned size) 27 { 28 if (size != sizeof(uint32_t)) { 29 fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size); 30 return; 31 } 32 33 xen_hvm_inject_msi(addr, data); 34 } 35 36 static const MemoryRegionOps xen_apic_io_ops = { 37 .read = xen_apic_mem_read, 38 .write = xen_apic_mem_write, 39 .endianness = DEVICE_NATIVE_ENDIAN, 40 }; 41 42 static void xen_apic_realize(DeviceState *dev, Error **errp) 43 { 44 APICCommonState *s = APIC_COMMON(dev); 45 46 s->vapic_control = 0; 47 memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s, 48 "xen-apic-msi", APIC_SPACE_SIZE); 49 msi_nonbroken = true; 50 } 51 52 static int xen_apic_set_base(APICCommonState *s, uint64_t val) 53 { 54 return 0; 55 } 56 57 static void xen_apic_set_tpr(APICCommonState *s, uint8_t val) 58 { 59 } 60 61 static uint8_t xen_apic_get_tpr(APICCommonState *s) 62 { 63 return 0; 64 } 65 66 static void xen_apic_vapic_base_update(APICCommonState *s) 67 { 68 } 69 70 static void xen_apic_external_nmi(APICCommonState *s) 71 { 72 } 73 74 static void xen_send_msi(MSIMessage *msi) 75 { 76 xen_hvm_inject_msi(msi->address, msi->data); 77 } 78 79 static void xen_apic_class_init(ObjectClass *klass, void *data) 80 { 81 APICCommonClass *k = APIC_COMMON_CLASS(klass); 82 83 k->realize = xen_apic_realize; 84 k->set_base = xen_apic_set_base; 85 k->set_tpr = xen_apic_set_tpr; 86 k->get_tpr = xen_apic_get_tpr; 87 k->vapic_base_update = xen_apic_vapic_base_update; 88 k->external_nmi = xen_apic_external_nmi; 89 k->send_msi = xen_send_msi; 90 } 91 92 static const TypeInfo xen_apic_info = { 93 .name = "xen-apic", 94 .parent = TYPE_APIC_COMMON, 95 .instance_size = sizeof(APICCommonState), 96 .class_init = xen_apic_class_init, 97 }; 98 99 static void xen_apic_register_types(void) 100 { 101 type_register_static(&xen_apic_info); 102 } 103 104 type_init(xen_apic_register_types) 105