root / hw / virtio / virtio-balloon.c @ f4dd69aa
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1 | bd322087 | aliguori | /*
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2 | d4443cb6 | Amit Shah | * Virtio Balloon Device
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3 | bd322087 | aliguori | *
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4 | bd322087 | aliguori | * Copyright IBM, Corp. 2008
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5 | d4443cb6 | Amit Shah | * Copyright (C) 2011 Red Hat, Inc.
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6 | d4443cb6 | Amit Shah | * Copyright (C) 2011 Amit Shah <amit.shah@redhat.com>
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7 | bd322087 | aliguori | *
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8 | bd322087 | aliguori | * Authors:
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9 | bd322087 | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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10 | bd322087 | aliguori | *
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11 | bd322087 | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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12 | bd322087 | aliguori | * the COPYING file in the top-level directory.
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13 | bd322087 | aliguori | *
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14 | bd322087 | aliguori | */
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15 | bd322087 | aliguori | |
16 | 1de7afc9 | Paolo Bonzini | #include "qemu/iov.h" |
17 | 7e6ccd9c | Luiz Capitulino | #include "qemu/timer.h" |
18 | bd322087 | aliguori | #include "qemu-common.h" |
19 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio.h" |
20 | 0d09e41a | Paolo Bonzini | #include "hw/i386/pc.h" |
21 | bd322087 | aliguori | #include "cpu.h" |
22 | 9c17d615 | Paolo Bonzini | #include "sysemu/balloon.h" |
23 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio-balloon.h" |
24 | 9c17d615 | Paolo Bonzini | #include "sysemu/kvm.h" |
25 | 022c62cb | Paolo Bonzini | #include "exec/address-spaces.h" |
26 | 7e6ccd9c | Luiz Capitulino | #include "qapi/visitor.h" |
27 | bd322087 | aliguori | |
28 | bd322087 | aliguori | #if defined(__linux__)
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29 | bd322087 | aliguori | #include <sys/mman.h> |
30 | bd322087 | aliguori | #endif
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31 | bd322087 | aliguori | |
32 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio-bus.h" |
33 | 1ab461b5 | KONRAD Frederic | |
34 | bd322087 | aliguori | static void balloon_page(void *addr, int deflate) |
35 | bd322087 | aliguori | { |
36 | bd322087 | aliguori | #if defined(__linux__)
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37 | bd322087 | aliguori | if (!kvm_enabled() || kvm_has_sync_mmu())
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38 | e78815a5 | Andreas Färber | qemu_madvise(addr, TARGET_PAGE_SIZE, |
39 | e78815a5 | Andreas Färber | deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); |
40 | bd322087 | aliguori | #endif
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41 | bd322087 | aliguori | } |
42 | bd322087 | aliguori | |
43 | 7e6ccd9c | Luiz Capitulino | static const char *balloon_stat_names[] = { |
44 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_SWAP_IN] = "stat-swap-in",
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45 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_SWAP_OUT] = "stat-swap-out",
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46 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_MAJFLT] = "stat-major-faults",
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47 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_MINFLT] = "stat-minor-faults",
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48 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_MEMFREE] = "stat-free-memory",
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49 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
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50 | 7e6ccd9c | Luiz Capitulino | [VIRTIO_BALLOON_S_NR] = NULL
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51 | 7e6ccd9c | Luiz Capitulino | }; |
52 | 7e6ccd9c | Luiz Capitulino | |
53 | 625a5bef | Adam Litke | /*
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54 | 625a5bef | Adam Litke | * reset_stats - Mark all items in the stats array as unset
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55 | 625a5bef | Adam Litke | *
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56 | 625a5bef | Adam Litke | * This function needs to be called at device intialization and before
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57 | 625a5bef | Adam Litke | * before updating to a set of newly-generated stats. This will ensure that no
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58 | 625a5bef | Adam Litke | * stale values stick around in case the guest reports a subset of the supported
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59 | 625a5bef | Adam Litke | * statistics.
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60 | 625a5bef | Adam Litke | */
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61 | 625a5bef | Adam Litke | static inline void reset_stats(VirtIOBalloon *dev) |
62 | 625a5bef | Adam Litke | { |
63 | 625a5bef | Adam Litke | int i;
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64 | 625a5bef | Adam Litke | for (i = 0; i < VIRTIO_BALLOON_S_NR; dev->stats[i++] = -1); |
65 | 625a5bef | Adam Litke | } |
66 | 625a5bef | Adam Litke | |
67 | 7e6ccd9c | Luiz Capitulino | static bool balloon_stats_supported(const VirtIOBalloon *s) |
68 | 7e6ccd9c | Luiz Capitulino | { |
69 | c96caced | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
70 | c96caced | KONRAD Frederic | return vdev->guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ); |
71 | 7e6ccd9c | Luiz Capitulino | } |
72 | 7e6ccd9c | Luiz Capitulino | |
73 | 7e6ccd9c | Luiz Capitulino | static bool balloon_stats_enabled(const VirtIOBalloon *s) |
74 | 7e6ccd9c | Luiz Capitulino | { |
75 | 7e6ccd9c | Luiz Capitulino | return s->stats_poll_interval > 0; |
76 | 7e6ccd9c | Luiz Capitulino | } |
77 | 7e6ccd9c | Luiz Capitulino | |
78 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_destroy_timer(VirtIOBalloon *s) |
79 | 7e6ccd9c | Luiz Capitulino | { |
80 | 7e6ccd9c | Luiz Capitulino | if (balloon_stats_enabled(s)) {
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81 | 7e6ccd9c | Luiz Capitulino | qemu_del_timer(s->stats_timer); |
82 | 7e6ccd9c | Luiz Capitulino | qemu_free_timer(s->stats_timer); |
83 | 7e6ccd9c | Luiz Capitulino | s->stats_timer = NULL;
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84 | 7e6ccd9c | Luiz Capitulino | s->stats_poll_interval = 0;
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85 | 7e6ccd9c | Luiz Capitulino | } |
86 | 7e6ccd9c | Luiz Capitulino | } |
87 | 7e6ccd9c | Luiz Capitulino | |
88 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_change_timer(VirtIOBalloon *s, int secs) |
89 | 7e6ccd9c | Luiz Capitulino | { |
90 | 7e6ccd9c | Luiz Capitulino | qemu_mod_timer(s->stats_timer, qemu_get_clock_ms(vm_clock) + secs * 1000);
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91 | 7e6ccd9c | Luiz Capitulino | } |
92 | 7e6ccd9c | Luiz Capitulino | |
93 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_poll_cb(void *opaque) |
94 | 7e6ccd9c | Luiz Capitulino | { |
95 | 7e6ccd9c | Luiz Capitulino | VirtIOBalloon *s = opaque; |
96 | c96caced | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
97 | 7e6ccd9c | Luiz Capitulino | |
98 | 7e6ccd9c | Luiz Capitulino | if (!balloon_stats_supported(s)) {
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99 | 7e6ccd9c | Luiz Capitulino | /* re-schedule */
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100 | 7e6ccd9c | Luiz Capitulino | balloon_stats_change_timer(s, s->stats_poll_interval); |
101 | 7e6ccd9c | Luiz Capitulino | return;
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102 | 7e6ccd9c | Luiz Capitulino | } |
103 | 7e6ccd9c | Luiz Capitulino | |
104 | 7e6ccd9c | Luiz Capitulino | virtqueue_push(s->svq, &s->stats_vq_elem, s->stats_vq_offset); |
105 | c96caced | KONRAD Frederic | virtio_notify(vdev, s->svq); |
106 | 7e6ccd9c | Luiz Capitulino | } |
107 | 7e6ccd9c | Luiz Capitulino | |
108 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_get_all(Object *obj, struct Visitor *v, |
109 | 7e6ccd9c | Luiz Capitulino | void *opaque, const char *name, Error **errp) |
110 | 7e6ccd9c | Luiz Capitulino | { |
111 | 7e6ccd9c | Luiz Capitulino | VirtIOBalloon *s = opaque; |
112 | 7e6ccd9c | Luiz Capitulino | int i;
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113 | 7e6ccd9c | Luiz Capitulino | |
114 | 7e6ccd9c | Luiz Capitulino | if (!s->stats_last_update) {
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115 | 7e6ccd9c | Luiz Capitulino | error_setg(errp, "guest hasn't updated any stats yet");
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116 | 7e6ccd9c | Luiz Capitulino | return;
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117 | 7e6ccd9c | Luiz Capitulino | } |
118 | 7e6ccd9c | Luiz Capitulino | |
119 | 7e6ccd9c | Luiz Capitulino | visit_start_struct(v, NULL, "guest-stats", name, 0, errp); |
120 | 7e6ccd9c | Luiz Capitulino | visit_type_int(v, &s->stats_last_update, "last-update", errp);
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121 | 7e6ccd9c | Luiz Capitulino | |
122 | 7e6ccd9c | Luiz Capitulino | visit_start_struct(v, NULL, NULL, "stats", 0, errp); |
123 | 7e6ccd9c | Luiz Capitulino | for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) { |
124 | 7e6ccd9c | Luiz Capitulino | visit_type_int64(v, (int64_t *) &s->stats[i], balloon_stat_names[i], |
125 | 7e6ccd9c | Luiz Capitulino | errp); |
126 | 7e6ccd9c | Luiz Capitulino | } |
127 | 7e6ccd9c | Luiz Capitulino | visit_end_struct(v, errp); |
128 | 7e6ccd9c | Luiz Capitulino | |
129 | 7e6ccd9c | Luiz Capitulino | visit_end_struct(v, errp); |
130 | 7e6ccd9c | Luiz Capitulino | } |
131 | 7e6ccd9c | Luiz Capitulino | |
132 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_get_poll_interval(Object *obj, struct Visitor *v, |
133 | 7e6ccd9c | Luiz Capitulino | void *opaque, const char *name, |
134 | 7e6ccd9c | Luiz Capitulino | Error **errp) |
135 | 7e6ccd9c | Luiz Capitulino | { |
136 | 7e6ccd9c | Luiz Capitulino | VirtIOBalloon *s = opaque; |
137 | 7e6ccd9c | Luiz Capitulino | visit_type_int(v, &s->stats_poll_interval, name, errp); |
138 | 7e6ccd9c | Luiz Capitulino | } |
139 | 7e6ccd9c | Luiz Capitulino | |
140 | 7e6ccd9c | Luiz Capitulino | static void balloon_stats_set_poll_interval(Object *obj, struct Visitor *v, |
141 | 7e6ccd9c | Luiz Capitulino | void *opaque, const char *name, |
142 | 7e6ccd9c | Luiz Capitulino | Error **errp) |
143 | 7e6ccd9c | Luiz Capitulino | { |
144 | 7e6ccd9c | Luiz Capitulino | VirtIOBalloon *s = opaque; |
145 | 7e6ccd9c | Luiz Capitulino | int64_t value; |
146 | 7e6ccd9c | Luiz Capitulino | |
147 | 7e6ccd9c | Luiz Capitulino | visit_type_int(v, &value, name, errp); |
148 | 7e6ccd9c | Luiz Capitulino | if (error_is_set(errp)) {
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149 | 7e6ccd9c | Luiz Capitulino | return;
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150 | 7e6ccd9c | Luiz Capitulino | } |
151 | 7e6ccd9c | Luiz Capitulino | |
152 | 7e6ccd9c | Luiz Capitulino | if (value < 0) { |
153 | 7e6ccd9c | Luiz Capitulino | error_setg(errp, "timer value must be greater than zero");
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154 | 7e6ccd9c | Luiz Capitulino | return;
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155 | 7e6ccd9c | Luiz Capitulino | } |
156 | 7e6ccd9c | Luiz Capitulino | |
157 | 7e6ccd9c | Luiz Capitulino | if (value == s->stats_poll_interval) {
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158 | 7e6ccd9c | Luiz Capitulino | return;
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159 | 7e6ccd9c | Luiz Capitulino | } |
160 | 7e6ccd9c | Luiz Capitulino | |
161 | 7e6ccd9c | Luiz Capitulino | if (value == 0) { |
162 | 7e6ccd9c | Luiz Capitulino | /* timer=0 disables the timer */
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163 | 7e6ccd9c | Luiz Capitulino | balloon_stats_destroy_timer(s); |
164 | 7e6ccd9c | Luiz Capitulino | return;
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165 | 7e6ccd9c | Luiz Capitulino | } |
166 | 7e6ccd9c | Luiz Capitulino | |
167 | 7e6ccd9c | Luiz Capitulino | if (balloon_stats_enabled(s)) {
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168 | 7e6ccd9c | Luiz Capitulino | /* timer interval change */
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169 | 7e6ccd9c | Luiz Capitulino | s->stats_poll_interval = value; |
170 | 7e6ccd9c | Luiz Capitulino | balloon_stats_change_timer(s, value); |
171 | 7e6ccd9c | Luiz Capitulino | return;
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172 | 7e6ccd9c | Luiz Capitulino | } |
173 | 7e6ccd9c | Luiz Capitulino | |
174 | 7e6ccd9c | Luiz Capitulino | /* create a new timer */
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175 | 7e6ccd9c | Luiz Capitulino | g_assert(s->stats_timer == NULL);
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176 | 7e6ccd9c | Luiz Capitulino | s->stats_timer = qemu_new_timer_ms(vm_clock, balloon_stats_poll_cb, s); |
177 | 7e6ccd9c | Luiz Capitulino | s->stats_poll_interval = value; |
178 | 7e6ccd9c | Luiz Capitulino | balloon_stats_change_timer(s, 0);
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179 | 7e6ccd9c | Luiz Capitulino | } |
180 | 7e6ccd9c | Luiz Capitulino | |
181 | bd322087 | aliguori | static void virtio_balloon_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
182 | bd322087 | aliguori | { |
183 | c96caced | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
184 | bd322087 | aliguori | VirtQueueElement elem; |
185 | b7c28c74 | Avi Kivity | MemoryRegionSection section; |
186 | bd322087 | aliguori | |
187 | bd322087 | aliguori | while (virtqueue_pop(vq, &elem)) {
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188 | bd322087 | aliguori | size_t offset = 0;
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189 | bd322087 | aliguori | uint32_t pfn; |
190 | bd322087 | aliguori | |
191 | dcf6f5e1 | Michael Tokarev | while (iov_to_buf(elem.out_sg, elem.out_num, offset, &pfn, 4) == 4) { |
192 | c227f099 | Anthony Liguori | ram_addr_t pa; |
193 | c227f099 | Anthony Liguori | ram_addr_t addr; |
194 | bd322087 | aliguori | |
195 | c227f099 | Anthony Liguori | pa = (ram_addr_t)ldl_p(&pfn) << VIRTIO_BALLOON_PFN_SHIFT; |
196 | bd322087 | aliguori | offset += 4;
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197 | bd322087 | aliguori | |
198 | b7c28c74 | Avi Kivity | /* FIXME: remove get_system_memory(), but how? */
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199 | b7c28c74 | Avi Kivity | section = memory_region_find(get_system_memory(), pa, 1);
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200 | b7c28c74 | Avi Kivity | if (!section.size || !memory_region_is_ram(section.mr))
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201 | bd322087 | aliguori | continue;
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202 | bd322087 | aliguori | |
203 | b7c28c74 | Avi Kivity | /* Using memory_region_get_ram_ptr is bending the rules a bit, but
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204 | 5c130f65 | pbrook | should be OK because we only want a single page. */
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205 | b7c28c74 | Avi Kivity | addr = section.offset_within_region; |
206 | b7c28c74 | Avi Kivity | balloon_page(memory_region_get_ram_ptr(section.mr) + addr, |
207 | b7c28c74 | Avi Kivity | !!(vq == s->dvq)); |
208 | bd322087 | aliguori | } |
209 | bd322087 | aliguori | |
210 | bd322087 | aliguori | virtqueue_push(vq, &elem, offset); |
211 | bd322087 | aliguori | virtio_notify(vdev, vq); |
212 | bd322087 | aliguori | } |
213 | bd322087 | aliguori | } |
214 | bd322087 | aliguori | |
215 | 625a5bef | Adam Litke | static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) |
216 | 625a5bef | Adam Litke | { |
217 | c96caced | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
218 | 625a5bef | Adam Litke | VirtQueueElement *elem = &s->stats_vq_elem; |
219 | 625a5bef | Adam Litke | VirtIOBalloonStat stat; |
220 | 625a5bef | Adam Litke | size_t offset = 0;
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221 | 7e6ccd9c | Luiz Capitulino | qemu_timeval tv; |
222 | 625a5bef | Adam Litke | |
223 | 625a5bef | Adam Litke | if (!virtqueue_pop(vq, elem)) {
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224 | 7e6ccd9c | Luiz Capitulino | goto out;
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225 | 625a5bef | Adam Litke | } |
226 | 625a5bef | Adam Litke | |
227 | 625a5bef | Adam Litke | /* Initialize the stats to get rid of any stale values. This is only
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228 | 625a5bef | Adam Litke | * needed to handle the case where a guest supports fewer stats than it
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229 | 625a5bef | Adam Litke | * used to (ie. it has booted into an old kernel).
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230 | 625a5bef | Adam Litke | */
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231 | 625a5bef | Adam Litke | reset_stats(s); |
232 | 625a5bef | Adam Litke | |
233 | dcf6f5e1 | Michael Tokarev | while (iov_to_buf(elem->out_sg, elem->out_num, offset, &stat, sizeof(stat)) |
234 | fa6111f2 | Amit Shah | == sizeof(stat)) {
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235 | 625a5bef | Adam Litke | uint16_t tag = tswap16(stat.tag); |
236 | 625a5bef | Adam Litke | uint64_t val = tswap64(stat.val); |
237 | 625a5bef | Adam Litke | |
238 | 625a5bef | Adam Litke | offset += sizeof(stat);
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239 | 625a5bef | Adam Litke | if (tag < VIRTIO_BALLOON_S_NR)
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240 | 625a5bef | Adam Litke | s->stats[tag] = val; |
241 | 625a5bef | Adam Litke | } |
242 | 625a5bef | Adam Litke | s->stats_vq_offset = offset; |
243 | 7e6ccd9c | Luiz Capitulino | |
244 | 7e6ccd9c | Luiz Capitulino | if (qemu_gettimeofday(&tv) < 0) { |
245 | 7e6ccd9c | Luiz Capitulino | fprintf(stderr, "warning: %s: failed to get time of day\n", __func__);
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246 | 7e6ccd9c | Luiz Capitulino | goto out;
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247 | 7e6ccd9c | Luiz Capitulino | } |
248 | 7e6ccd9c | Luiz Capitulino | |
249 | 7e6ccd9c | Luiz Capitulino | s->stats_last_update = tv.tv_sec; |
250 | 7e6ccd9c | Luiz Capitulino | |
251 | 7e6ccd9c | Luiz Capitulino | out:
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252 | 7e6ccd9c | Luiz Capitulino | if (balloon_stats_enabled(s)) {
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253 | 7e6ccd9c | Luiz Capitulino | balloon_stats_change_timer(s, s->stats_poll_interval); |
254 | 7e6ccd9c | Luiz Capitulino | } |
255 | 625a5bef | Adam Litke | } |
256 | 625a5bef | Adam Litke | |
257 | bd322087 | aliguori | static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data) |
258 | bd322087 | aliguori | { |
259 | c96caced | KONRAD Frederic | VirtIOBalloon *dev = VIRTIO_BALLOON(vdev); |
260 | bd322087 | aliguori | struct virtio_balloon_config config;
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261 | bd322087 | aliguori | |
262 | bd322087 | aliguori | config.num_pages = cpu_to_le32(dev->num_pages); |
263 | bd322087 | aliguori | config.actual = cpu_to_le32(dev->actual); |
264 | bd322087 | aliguori | |
265 | bd322087 | aliguori | memcpy(config_data, &config, 8);
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266 | bd322087 | aliguori | } |
267 | bd322087 | aliguori | |
268 | bd322087 | aliguori | static void virtio_balloon_set_config(VirtIODevice *vdev, |
269 | bd322087 | aliguori | const uint8_t *config_data)
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270 | bd322087 | aliguori | { |
271 | c96caced | KONRAD Frederic | VirtIOBalloon *dev = VIRTIO_BALLOON(vdev); |
272 | bd322087 | aliguori | struct virtio_balloon_config config;
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273 | 973603a8 | Daniel P. Berrange | uint32_t oldactual = dev->actual; |
274 | bd322087 | aliguori | memcpy(&config, config_data, 8);
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275 | e54f1771 | Alexey Kardashevskiy | dev->actual = le32_to_cpu(config.actual); |
276 | 973603a8 | Daniel P. Berrange | if (dev->actual != oldactual) {
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277 | 973603a8 | Daniel P. Berrange | qemu_balloon_changed(ram_size - |
278 | dcc6ceff | Luiz Capitulino | ((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT)); |
279 | 973603a8 | Daniel P. Berrange | } |
280 | bd322087 | aliguori | } |
281 | bd322087 | aliguori | |
282 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_balloon_get_features(VirtIODevice *vdev, uint32_t f)
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283 | bd322087 | aliguori | { |
284 | 625a5bef | Adam Litke | f |= (1 << VIRTIO_BALLOON_F_STATS_VQ);
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285 | 8172539d | Michael S. Tsirkin | return f;
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286 | bd322087 | aliguori | } |
287 | bd322087 | aliguori | |
288 | 96637bcd | Luiz Capitulino | static void virtio_balloon_stat(void *opaque, BalloonInfo *info) |
289 | dce911c7 | Amit Shah | { |
290 | dce911c7 | Amit Shah | VirtIOBalloon *dev = opaque; |
291 | 96637bcd | Luiz Capitulino | info->actual = ram_size - ((uint64_t) dev->actual << |
292 | 96637bcd | Luiz Capitulino | VIRTIO_BALLOON_PFN_SHIFT); |
293 | dce911c7 | Amit Shah | } |
294 | dce911c7 | Amit Shah | |
295 | 30fb2ca6 | Amit Shah | static void virtio_balloon_to_target(void *opaque, ram_addr_t target) |
296 | bd322087 | aliguori | { |
297 | c96caced | KONRAD Frederic | VirtIOBalloon *dev = VIRTIO_BALLOON(opaque); |
298 | c96caced | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
299 | bd322087 | aliguori | |
300 | dce911c7 | Amit Shah | if (target > ram_size) {
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301 | bd322087 | aliguori | target = ram_size; |
302 | dce911c7 | Amit Shah | } |
303 | bd322087 | aliguori | if (target) {
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304 | bd322087 | aliguori | dev->num_pages = (ram_size - target) >> VIRTIO_BALLOON_PFN_SHIFT; |
305 | c96caced | KONRAD Frederic | virtio_notify_config(vdev); |
306 | bd322087 | aliguori | } |
307 | bd322087 | aliguori | } |
308 | bd322087 | aliguori | |
309 | bd322087 | aliguori | static void virtio_balloon_save(QEMUFile *f, void *opaque) |
310 | bd322087 | aliguori | { |
311 | c96caced | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(opaque); |
312 | c96caced | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
313 | bd322087 | aliguori | |
314 | c96caced | KONRAD Frederic | virtio_save(vdev, f); |
315 | bd322087 | aliguori | |
316 | bd322087 | aliguori | qemu_put_be32(f, s->num_pages); |
317 | bd322087 | aliguori | qemu_put_be32(f, s->actual); |
318 | bd322087 | aliguori | } |
319 | bd322087 | aliguori | |
320 | bd322087 | aliguori | static int virtio_balloon_load(QEMUFile *f, void *opaque, int version_id) |
321 | bd322087 | aliguori | { |
322 | c96caced | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(opaque); |
323 | c96caced | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
324 | 2a633c46 | Orit Wassermann | int ret;
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325 | bd322087 | aliguori | |
326 | bd322087 | aliguori | if (version_id != 1) |
327 | bd322087 | aliguori | return -EINVAL;
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328 | bd322087 | aliguori | |
329 | c96caced | KONRAD Frederic | ret = virtio_load(vdev, f); |
330 | 2a633c46 | Orit Wassermann | if (ret) {
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331 | 2a633c46 | Orit Wassermann | return ret;
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332 | 2a633c46 | Orit Wassermann | } |
333 | bd322087 | aliguori | |
334 | bd322087 | aliguori | s->num_pages = qemu_get_be32(f); |
335 | bd322087 | aliguori | s->actual = qemu_get_be32(f); |
336 | bd322087 | aliguori | return 0; |
337 | bd322087 | aliguori | } |
338 | bd322087 | aliguori | |
339 | 5c7d0962 | KONRAD Frederic | static int virtio_balloon_device_init(VirtIODevice *vdev) |
340 | bd322087 | aliguori | { |
341 | 5c7d0962 | KONRAD Frederic | DeviceState *qdev = DEVICE(vdev); |
342 | 5c7d0962 | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
343 | f76f6655 | Amit Shah | int ret;
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344 | bd322087 | aliguori | |
345 | 5c7d0962 | KONRAD Frederic | virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON, 8); |
346 | bd322087 | aliguori | |
347 | f76f6655 | Amit Shah | ret = qemu_add_balloon_handler(virtio_balloon_to_target, |
348 | f76f6655 | Amit Shah | virtio_balloon_stat, s); |
349 | 5c7d0962 | KONRAD Frederic | |
350 | 1ab461b5 | KONRAD Frederic | if (ret < 0) { |
351 | 6a1a8cc7 | KONRAD Frederic | virtio_cleanup(VIRTIO_DEVICE(s)); |
352 | 5c7d0962 | KONRAD Frederic | return -1; |
353 | 1ab461b5 | KONRAD Frederic | } |
354 | f76f6655 | Amit Shah | |
355 | 5c7d0962 | KONRAD Frederic | s->ivq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output);
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356 | 5c7d0962 | KONRAD Frederic | s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output);
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357 | 5c7d0962 | KONRAD Frederic | s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats);
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358 | bd322087 | aliguori | |
359 | 5c7d0962 | KONRAD Frederic | register_savevm(qdev, "virtio-balloon", -1, 1, |
360 | 0be71e32 | Alex Williamson | virtio_balloon_save, virtio_balloon_load, s); |
361 | bd322087 | aliguori | |
362 | 5c7d0962 | KONRAD Frederic | object_property_add(OBJECT(qdev), "guest-stats", "guest statistics", |
363 | 7e6ccd9c | Luiz Capitulino | balloon_stats_get_all, NULL, NULL, s, NULL); |
364 | 7e6ccd9c | Luiz Capitulino | |
365 | 5c7d0962 | KONRAD Frederic | object_property_add(OBJECT(qdev), "guest-stats-polling-interval", "int", |
366 | 7e6ccd9c | Luiz Capitulino | balloon_stats_get_poll_interval, |
367 | 7e6ccd9c | Luiz Capitulino | balloon_stats_set_poll_interval, |
368 | 7e6ccd9c | Luiz Capitulino | NULL, s, NULL); |
369 | 1ab461b5 | KONRAD Frederic | return 0; |
370 | 1ab461b5 | KONRAD Frederic | } |
371 | 1ab461b5 | KONRAD Frederic | |
372 | 1ab461b5 | KONRAD Frederic | static int virtio_balloon_device_exit(DeviceState *qdev) |
373 | 1ab461b5 | KONRAD Frederic | { |
374 | 1ab461b5 | KONRAD Frederic | VirtIOBalloon *s = VIRTIO_BALLOON(qdev); |
375 | 1ab461b5 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(qdev); |
376 | 1ab461b5 | KONRAD Frederic | |
377 | 1ab461b5 | KONRAD Frederic | balloon_stats_destroy_timer(s); |
378 | 1ab461b5 | KONRAD Frederic | qemu_remove_balloon_handler(s); |
379 | 1ab461b5 | KONRAD Frederic | unregister_savevm(qdev, "virtio-balloon", s);
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380 | 6a1a8cc7 | KONRAD Frederic | virtio_cleanup(vdev); |
381 | 1ab461b5 | KONRAD Frederic | return 0; |
382 | 1ab461b5 | KONRAD Frederic | } |
383 | 1ab461b5 | KONRAD Frederic | |
384 | 1ab461b5 | KONRAD Frederic | static Property virtio_balloon_properties[] = {
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385 | 1ab461b5 | KONRAD Frederic | DEFINE_PROP_END_OF_LIST(), |
386 | 1ab461b5 | KONRAD Frederic | }; |
387 | 1ab461b5 | KONRAD Frederic | |
388 | 1ab461b5 | KONRAD Frederic | static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
389 | 1ab461b5 | KONRAD Frederic | { |
390 | 1ab461b5 | KONRAD Frederic | DeviceClass *dc = DEVICE_CLASS(klass); |
391 | 1ab461b5 | KONRAD Frederic | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
392 | 1ab461b5 | KONRAD Frederic | dc->exit = virtio_balloon_device_exit; |
393 | 1ab461b5 | KONRAD Frederic | dc->props = virtio_balloon_properties; |
394 | 1ab461b5 | KONRAD Frederic | vdc->init = virtio_balloon_device_init; |
395 | 1ab461b5 | KONRAD Frederic | vdc->get_config = virtio_balloon_get_config; |
396 | 1ab461b5 | KONRAD Frederic | vdc->set_config = virtio_balloon_set_config; |
397 | 1ab461b5 | KONRAD Frederic | vdc->get_features = virtio_balloon_get_features; |
398 | 1ab461b5 | KONRAD Frederic | } |
399 | 1ab461b5 | KONRAD Frederic | |
400 | 1ab461b5 | KONRAD Frederic | static const TypeInfo virtio_balloon_info = { |
401 | 1ab461b5 | KONRAD Frederic | .name = TYPE_VIRTIO_BALLOON, |
402 | 1ab461b5 | KONRAD Frederic | .parent = TYPE_VIRTIO_DEVICE, |
403 | 1ab461b5 | KONRAD Frederic | .instance_size = sizeof(VirtIOBalloon),
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404 | 1ab461b5 | KONRAD Frederic | .class_init = virtio_balloon_class_init, |
405 | 1ab461b5 | KONRAD Frederic | }; |
406 | 1ab461b5 | KONRAD Frederic | |
407 | 1ab461b5 | KONRAD Frederic | static void virtio_register_types(void) |
408 | 1ab461b5 | KONRAD Frederic | { |
409 | 1ab461b5 | KONRAD Frederic | type_register_static(&virtio_balloon_info); |
410 | 1ab461b5 | KONRAD Frederic | } |
411 | 1ab461b5 | KONRAD Frederic | |
412 | 1ab461b5 | KONRAD Frederic | type_init(virtio_register_types) |