root / hw / xen_apic.c @ a1bc20df
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1 | 9468e9c4 | Wei Liu | /*
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2 | 9468e9c4 | Wei Liu | * Xen basic APIC support
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3 | 9468e9c4 | Wei Liu | *
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4 | 9468e9c4 | Wei Liu | * Copyright (c) 2012 Citrix
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5 | 9468e9c4 | Wei Liu | *
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6 | 9468e9c4 | Wei Liu | * Authors:
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7 | 9468e9c4 | Wei Liu | * Wei Liu <wei.liu2@citrix.com>
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8 | 9468e9c4 | Wei Liu | *
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9 | 9468e9c4 | Wei Liu | * This work is licensed under the terms of the GNU GPL version 2 or
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10 | 9468e9c4 | Wei Liu | * later. See the COPYING file in the top-level directory.
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11 | 9468e9c4 | Wei Liu | */
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12 | 9468e9c4 | Wei Liu | #include "hw/apic_internal.h" |
13 | 9468e9c4 | Wei Liu | #include "hw/msi.h" |
14 | 9468e9c4 | Wei Liu | #include "xen.h" |
15 | 9468e9c4 | Wei Liu | |
16 | a8170e5e | Avi Kivity | static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr, |
17 | 9468e9c4 | Wei Liu | unsigned size)
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18 | 9468e9c4 | Wei Liu | { |
19 | 9468e9c4 | Wei Liu | return ~(uint64_t)0; |
20 | 9468e9c4 | Wei Liu | } |
21 | 9468e9c4 | Wei Liu | |
22 | a8170e5e | Avi Kivity | static void xen_apic_mem_write(void *opaque, hwaddr addr, |
23 | 9468e9c4 | Wei Liu | uint64_t data, unsigned size)
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24 | 9468e9c4 | Wei Liu | { |
25 | 9468e9c4 | Wei Liu | if (size != sizeof(uint32_t)) { |
26 | 9468e9c4 | Wei Liu | fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size);
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27 | 9468e9c4 | Wei Liu | return;
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28 | 9468e9c4 | Wei Liu | } |
29 | 9468e9c4 | Wei Liu | |
30 | 9468e9c4 | Wei Liu | xen_hvm_inject_msi(addr, data); |
31 | 9468e9c4 | Wei Liu | } |
32 | 9468e9c4 | Wei Liu | |
33 | 9468e9c4 | Wei Liu | static const MemoryRegionOps xen_apic_io_ops = { |
34 | 9468e9c4 | Wei Liu | .read = xen_apic_mem_read, |
35 | 9468e9c4 | Wei Liu | .write = xen_apic_mem_write, |
36 | 9468e9c4 | Wei Liu | .endianness = DEVICE_NATIVE_ENDIAN, |
37 | 9468e9c4 | Wei Liu | }; |
38 | 9468e9c4 | Wei Liu | |
39 | 9468e9c4 | Wei Liu | static void xen_apic_init(APICCommonState *s) |
40 | 9468e9c4 | Wei Liu | { |
41 | 9468e9c4 | Wei Liu | memory_region_init_io(&s->io_memory, &xen_apic_io_ops, s, "xen-apic-msi",
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42 | 9468e9c4 | Wei Liu | MSI_SPACE_SIZE); |
43 | 08a82ac0 | Jan Kiszka | |
44 | 08a82ac0 | Jan Kiszka | #if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
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45 | 08a82ac0 | Jan Kiszka | && CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420
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46 | 08a82ac0 | Jan Kiszka | msi_supported = true;
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47 | 08a82ac0 | Jan Kiszka | #endif
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48 | 9468e9c4 | Wei Liu | } |
49 | 9468e9c4 | Wei Liu | |
50 | 9468e9c4 | Wei Liu | static void xen_apic_set_base(APICCommonState *s, uint64_t val) |
51 | 9468e9c4 | Wei Liu | { |
52 | 9468e9c4 | Wei Liu | } |
53 | 9468e9c4 | Wei Liu | |
54 | 9468e9c4 | Wei Liu | static void xen_apic_set_tpr(APICCommonState *s, uint8_t val) |
55 | 9468e9c4 | Wei Liu | { |
56 | 9468e9c4 | Wei Liu | } |
57 | 9468e9c4 | Wei Liu | |
58 | 9468e9c4 | Wei Liu | static uint8_t xen_apic_get_tpr(APICCommonState *s)
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59 | 9468e9c4 | Wei Liu | { |
60 | 9468e9c4 | Wei Liu | return 0; |
61 | 9468e9c4 | Wei Liu | } |
62 | 9468e9c4 | Wei Liu | |
63 | 9468e9c4 | Wei Liu | static void xen_apic_vapic_base_update(APICCommonState *s) |
64 | 9468e9c4 | Wei Liu | { |
65 | 9468e9c4 | Wei Liu | } |
66 | 9468e9c4 | Wei Liu | |
67 | 9468e9c4 | Wei Liu | static void xen_apic_external_nmi(APICCommonState *s) |
68 | 9468e9c4 | Wei Liu | { |
69 | 9468e9c4 | Wei Liu | } |
70 | 9468e9c4 | Wei Liu | |
71 | 9468e9c4 | Wei Liu | static void xen_apic_class_init(ObjectClass *klass, void *data) |
72 | 9468e9c4 | Wei Liu | { |
73 | 9468e9c4 | Wei Liu | APICCommonClass *k = APIC_COMMON_CLASS(klass); |
74 | 9468e9c4 | Wei Liu | |
75 | 9468e9c4 | Wei Liu | k->init = xen_apic_init; |
76 | 9468e9c4 | Wei Liu | k->set_base = xen_apic_set_base; |
77 | 9468e9c4 | Wei Liu | k->set_tpr = xen_apic_set_tpr; |
78 | 9468e9c4 | Wei Liu | k->get_tpr = xen_apic_get_tpr; |
79 | 9468e9c4 | Wei Liu | k->vapic_base_update = xen_apic_vapic_base_update; |
80 | 9468e9c4 | Wei Liu | k->external_nmi = xen_apic_external_nmi; |
81 | 9468e9c4 | Wei Liu | } |
82 | 9468e9c4 | Wei Liu | |
83 | 9468e9c4 | Wei Liu | static TypeInfo xen_apic_info = {
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84 | 9468e9c4 | Wei Liu | .name = "xen-apic",
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85 | 9468e9c4 | Wei Liu | .parent = TYPE_APIC_COMMON, |
86 | 9468e9c4 | Wei Liu | .instance_size = sizeof(APICCommonState),
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87 | 9468e9c4 | Wei Liu | .class_init = xen_apic_class_init, |
88 | 9468e9c4 | Wei Liu | }; |
89 | 9468e9c4 | Wei Liu | |
90 | 9468e9c4 | Wei Liu | static void xen_apic_register_types(void) |
91 | 9468e9c4 | Wei Liu | { |
92 | 9468e9c4 | Wei Liu | type_register_static(&xen_apic_info); |
93 | 9468e9c4 | Wei Liu | } |
94 | 9468e9c4 | Wei Liu | |
95 | 9468e9c4 | Wei Liu | type_init(xen_apic_register_types) |