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
xen_apic_mem_read(void * opaque,hwaddr addr,unsigned size)19 static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr,
20 unsigned size)
21 {
22 return ~(uint64_t)0;
23 }
24
xen_apic_mem_write(void * opaque,hwaddr addr,uint64_t data,unsigned size)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
xen_apic_realize(DeviceState * dev,Error ** errp)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
xen_apic_set_base(APICCommonState * s,uint64_t val)52 static int xen_apic_set_base(APICCommonState *s, uint64_t val)
53 {
54 return 0;
55 }
56
xen_apic_set_tpr(APICCommonState * s,uint8_t val)57 static void xen_apic_set_tpr(APICCommonState *s, uint8_t val)
58 {
59 }
60
xen_apic_get_tpr(APICCommonState * s)61 static uint8_t xen_apic_get_tpr(APICCommonState *s)
62 {
63 return 0;
64 }
65
xen_apic_vapic_base_update(APICCommonState * s)66 static void xen_apic_vapic_base_update(APICCommonState *s)
67 {
68 }
69
xen_apic_external_nmi(APICCommonState * s)70 static void xen_apic_external_nmi(APICCommonState *s)
71 {
72 }
73
xen_send_msi(MSIMessage * msi)74 static void xen_send_msi(MSIMessage *msi)
75 {
76 xen_hvm_inject_msi(msi->address, msi->data);
77 }
78
xen_apic_class_init(ObjectClass * klass,void * data)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
xen_apic_register_types(void)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