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1 | 28c28973 | Paolo Bonzini | /*
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2 | 28c28973 | Paolo Bonzini | * QEMU System Emulator
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3 | 28c28973 | Paolo Bonzini | *
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4 | 28c28973 | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | 28c28973 | Paolo Bonzini | *
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6 | 28c28973 | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 28c28973 | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
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8 | 28c28973 | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
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9 | 28c28973 | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 28c28973 | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
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11 | 28c28973 | Paolo Bonzini | * furnished to do so, subject to the following conditions:
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12 | 28c28973 | Paolo Bonzini | *
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13 | 28c28973 | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
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14 | 28c28973 | Paolo Bonzini | * all copies or substantial portions of the Software.
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15 | 28c28973 | Paolo Bonzini | *
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16 | 28c28973 | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 28c28973 | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 28c28973 | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 28c28973 | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 28c28973 | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 28c28973 | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 28c28973 | Paolo Bonzini | * THE SOFTWARE.
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23 | 28c28973 | Paolo Bonzini | */
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24 | 28c28973 | Paolo Bonzini | |
25 | 28c28973 | Paolo Bonzini | #include "sysemu.h" |
26 | 28c28973 | Paolo Bonzini | #include "monitor.h" |
27 | 28c28973 | Paolo Bonzini | #include "qjson.h" |
28 | 28c28973 | Paolo Bonzini | #include "qint.h" |
29 | 28c28973 | Paolo Bonzini | #include "cpu-common.h" |
30 | 28c28973 | Paolo Bonzini | #include "kvm.h" |
31 | 28c28973 | Paolo Bonzini | #include "balloon.h" |
32 | 62dd89de | Prerna Saxena | #include "trace.h" |
33 | 28c28973 | Paolo Bonzini | |
34 | 28c28973 | Paolo Bonzini | |
35 | 28c28973 | Paolo Bonzini | static QEMUBalloonEvent *qemu_balloon_event;
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36 | 28c28973 | Paolo Bonzini | void *qemu_balloon_event_opaque;
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37 | 28c28973 | Paolo Bonzini | |
38 | 28c28973 | Paolo Bonzini | void qemu_add_balloon_handler(QEMUBalloonEvent *func, void *opaque) |
39 | 28c28973 | Paolo Bonzini | { |
40 | 28c28973 | Paolo Bonzini | qemu_balloon_event = func; |
41 | 28c28973 | Paolo Bonzini | qemu_balloon_event_opaque = opaque; |
42 | 28c28973 | Paolo Bonzini | } |
43 | 28c28973 | Paolo Bonzini | |
44 | 28c28973 | Paolo Bonzini | int qemu_balloon(ram_addr_t target, MonitorCompletion cb, void *opaque) |
45 | 28c28973 | Paolo Bonzini | { |
46 | 28c28973 | Paolo Bonzini | if (qemu_balloon_event) {
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47 | 62dd89de | Prerna Saxena | trace_balloon_event(qemu_balloon_event_opaque, target); |
48 | 28c28973 | Paolo Bonzini | qemu_balloon_event(qemu_balloon_event_opaque, target, cb, opaque); |
49 | 28c28973 | Paolo Bonzini | return 1; |
50 | 28c28973 | Paolo Bonzini | } else {
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51 | 28c28973 | Paolo Bonzini | return 0; |
52 | 28c28973 | Paolo Bonzini | } |
53 | 28c28973 | Paolo Bonzini | } |
54 | 28c28973 | Paolo Bonzini | |
55 | 28c28973 | Paolo Bonzini | int qemu_balloon_status(MonitorCompletion cb, void *opaque) |
56 | 28c28973 | Paolo Bonzini | { |
57 | 28c28973 | Paolo Bonzini | if (qemu_balloon_event) {
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58 | 28c28973 | Paolo Bonzini | qemu_balloon_event(qemu_balloon_event_opaque, 0, cb, opaque);
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59 | 28c28973 | Paolo Bonzini | return 1; |
60 | 28c28973 | Paolo Bonzini | } else {
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61 | 28c28973 | Paolo Bonzini | return 0; |
62 | 28c28973 | Paolo Bonzini | } |
63 | 28c28973 | Paolo Bonzini | } |
64 | 28c28973 | Paolo Bonzini | |
65 | 28c28973 | Paolo Bonzini | static void print_balloon_stat(const char *key, QObject *obj, void *opaque) |
66 | 28c28973 | Paolo Bonzini | { |
67 | 28c28973 | Paolo Bonzini | Monitor *mon = opaque; |
68 | 28c28973 | Paolo Bonzini | |
69 | 28c28973 | Paolo Bonzini | if (strcmp(key, "actual")) |
70 | 28c28973 | Paolo Bonzini | monitor_printf(mon, ",%s=%" PRId64, key,
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71 | 28c28973 | Paolo Bonzini | qint_get_int(qobject_to_qint(obj))); |
72 | 28c28973 | Paolo Bonzini | } |
73 | 28c28973 | Paolo Bonzini | |
74 | 28c28973 | Paolo Bonzini | void monitor_print_balloon(Monitor *mon, const QObject *data) |
75 | 28c28973 | Paolo Bonzini | { |
76 | 28c28973 | Paolo Bonzini | QDict *qdict; |
77 | 28c28973 | Paolo Bonzini | |
78 | 28c28973 | Paolo Bonzini | qdict = qobject_to_qdict(data); |
79 | 28c28973 | Paolo Bonzini | if (!qdict_haskey(qdict, "actual")) |
80 | 28c28973 | Paolo Bonzini | return;
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81 | 28c28973 | Paolo Bonzini | |
82 | 28c28973 | Paolo Bonzini | monitor_printf(mon, "balloon: actual=%" PRId64,
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83 | 28c28973 | Paolo Bonzini | qdict_get_int(qdict, "actual") >> 20); |
84 | 28c28973 | Paolo Bonzini | qdict_iter(qdict, print_balloon_stat, mon); |
85 | 28c28973 | Paolo Bonzini | monitor_printf(mon, "\n");
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86 | 28c28973 | Paolo Bonzini | } |
87 | 28c28973 | Paolo Bonzini | |
88 | 28c28973 | Paolo Bonzini | /**
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89 | 28c28973 | Paolo Bonzini | * do_info_balloon(): Balloon information
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90 | 28c28973 | Paolo Bonzini | *
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91 | 28c28973 | Paolo Bonzini | * Make an asynchronous request for balloon info. When the request completes
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92 | 28c28973 | Paolo Bonzini | * a QDict will be returned according to the following specification:
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93 | 28c28973 | Paolo Bonzini | *
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94 | 28c28973 | Paolo Bonzini | * - "actual": current balloon value in bytes
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95 | 28c28973 | Paolo Bonzini | * The following fields may or may not be present:
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96 | 28c28973 | Paolo Bonzini | * - "mem_swapped_in": Amount of memory swapped in (bytes)
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97 | 28c28973 | Paolo Bonzini | * - "mem_swapped_out": Amount of memory swapped out (bytes)
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98 | 28c28973 | Paolo Bonzini | * - "major_page_faults": Number of major faults
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99 | 28c28973 | Paolo Bonzini | * - "minor_page_faults": Number of minor faults
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100 | 28c28973 | Paolo Bonzini | * - "free_mem": Total amount of free and unused memory (bytes)
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101 | 28c28973 | Paolo Bonzini | * - "total_mem": Total amount of available memory (bytes)
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102 | 28c28973 | Paolo Bonzini | *
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103 | 28c28973 | Paolo Bonzini | * Example:
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104 | 28c28973 | Paolo Bonzini | *
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105 | 28c28973 | Paolo Bonzini | * { "actual": 1073741824, "mem_swapped_in": 0, "mem_swapped_out": 0,
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106 | 28c28973 | Paolo Bonzini | * "major_page_faults": 142, "minor_page_faults": 239245,
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107 | 28c28973 | Paolo Bonzini | * "free_mem": 1014185984, "total_mem": 1044668416 }
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108 | 28c28973 | Paolo Bonzini | */
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109 | 28c28973 | Paolo Bonzini | int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque) |
110 | 28c28973 | Paolo Bonzini | { |
111 | 28c28973 | Paolo Bonzini | int ret;
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112 | 28c28973 | Paolo Bonzini | |
113 | 28c28973 | Paolo Bonzini | if (kvm_enabled() && !kvm_has_sync_mmu()) {
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114 | 28c28973 | Paolo Bonzini | qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon"); |
115 | 28c28973 | Paolo Bonzini | return -1; |
116 | 28c28973 | Paolo Bonzini | } |
117 | 28c28973 | Paolo Bonzini | |
118 | 28c28973 | Paolo Bonzini | ret = qemu_balloon_status(cb, opaque); |
119 | 28c28973 | Paolo Bonzini | if (!ret) {
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120 | 28c28973 | Paolo Bonzini | qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");
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121 | 28c28973 | Paolo Bonzini | return -1; |
122 | 28c28973 | Paolo Bonzini | } |
123 | 28c28973 | Paolo Bonzini | |
124 | 28c28973 | Paolo Bonzini | return 0; |
125 | 28c28973 | Paolo Bonzini | } |
126 | 28c28973 | Paolo Bonzini | |
127 | 28c28973 | Paolo Bonzini | /**
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128 | 28c28973 | Paolo Bonzini | * do_balloon(): Request VM to change its memory allocation
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129 | 28c28973 | Paolo Bonzini | */
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130 | 28c28973 | Paolo Bonzini | int do_balloon(Monitor *mon, const QDict *params, |
131 | 28c28973 | Paolo Bonzini | MonitorCompletion cb, void *opaque)
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132 | 28c28973 | Paolo Bonzini | { |
133 | 28c28973 | Paolo Bonzini | int ret;
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134 | 28c28973 | Paolo Bonzini | |
135 | 28c28973 | Paolo Bonzini | if (kvm_enabled() && !kvm_has_sync_mmu()) {
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136 | 28c28973 | Paolo Bonzini | qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon"); |
137 | 28c28973 | Paolo Bonzini | return -1; |
138 | 28c28973 | Paolo Bonzini | } |
139 | 28c28973 | Paolo Bonzini | |
140 | 28c28973 | Paolo Bonzini | ret = qemu_balloon(qdict_get_int(params, "value"), cb, opaque);
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141 | 28c28973 | Paolo Bonzini | if (ret == 0) { |
142 | 28c28973 | Paolo Bonzini | qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");
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143 | 28c28973 | Paolo Bonzini | return -1; |
144 | 28c28973 | Paolo Bonzini | } |
145 | 28c28973 | Paolo Bonzini | |
146 | 28c28973 | Paolo Bonzini | cb(opaque, NULL);
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147 | 28c28973 | Paolo Bonzini | return 0; |
148 | 28c28973 | Paolo Bonzini | } |