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9468e9c4 WL |
1 | /* |
2 | * Xen basic APIC support | |
3 | * | |
4 | * Copyright (c) 2012 Citrix | |
5 | * | |
6 | * Authors: | |
7 | * Wei Liu <[email protected]> | |
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 "hw/apic_internal.h" | |
a2cb15b0 | 13 | #include "hw/pci/msi.h" |
9468e9c4 WL |
14 | #include "xen.h" |
15 | ||
a8170e5e | 16 | static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr, |
9468e9c4 WL |
17 | unsigned size) |
18 | { | |
19 | return ~(uint64_t)0; | |
20 | } | |
21 | ||
a8170e5e | 22 | static void xen_apic_mem_write(void *opaque, hwaddr addr, |
9468e9c4 WL |
23 | uint64_t data, unsigned size) |
24 | { | |
25 | if (size != sizeof(uint32_t)) { | |
26 | fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size); | |
27 | return; | |
28 | } | |
29 | ||
30 | xen_hvm_inject_msi(addr, data); | |
31 | } | |
32 | ||
33 | static const MemoryRegionOps xen_apic_io_ops = { | |
34 | .read = xen_apic_mem_read, | |
35 | .write = xen_apic_mem_write, | |
36 | .endianness = DEVICE_NATIVE_ENDIAN, | |
37 | }; | |
38 | ||
39 | static void xen_apic_init(APICCommonState *s) | |
40 | { | |
41 | memory_region_init_io(&s->io_memory, &xen_apic_io_ops, s, "xen-apic-msi", | |
42 | MSI_SPACE_SIZE); | |
08a82ac0 JK |
43 | |
44 | #if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \ | |
45 | && CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420 | |
46 | msi_supported = true; | |
47 | #endif | |
9468e9c4 WL |
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->init = xen_apic_init; | |
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 | ||
8c43a6f0 | 83 | static const TypeInfo xen_apic_info = { |
9468e9c4 WL |
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) |