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1 | d5970055 | Michael S. Tsirkin | /*
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2 | d5970055 | Michael S. Tsirkin | * vhost support
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3 | d5970055 | Michael S. Tsirkin | *
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4 | d5970055 | Michael S. Tsirkin | * Copyright Red Hat, Inc. 2010
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5 | d5970055 | Michael S. Tsirkin | *
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6 | d5970055 | Michael S. Tsirkin | * Authors:
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7 | d5970055 | Michael S. Tsirkin | * Michael S. Tsirkin <mst@redhat.com>
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8 | d5970055 | Michael S. Tsirkin | *
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9 | d5970055 | Michael S. Tsirkin | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | d5970055 | Michael S. Tsirkin | * the COPYING file in the top-level directory.
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11 | d5970055 | Michael S. Tsirkin | */
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12 | d5970055 | Michael S. Tsirkin | |
13 | d5970055 | Michael S. Tsirkin | #include <sys/ioctl.h> |
14 | d5970055 | Michael S. Tsirkin | #include "vhost.h" |
15 | d5970055 | Michael S. Tsirkin | #include "hw/hw.h" |
16 | bf1b0071 | Blue Swirl | #include "range.h" |
17 | 11078ae3 | Marcelo Tosatti | #include <linux/vhost.h> |
18 | d5970055 | Michael S. Tsirkin | |
19 | d5970055 | Michael S. Tsirkin | static void vhost_dev_sync_region(struct vhost_dev *dev, |
20 | d5970055 | Michael S. Tsirkin | uint64_t mfirst, uint64_t mlast, |
21 | d5970055 | Michael S. Tsirkin | uint64_t rfirst, uint64_t rlast) |
22 | d5970055 | Michael S. Tsirkin | { |
23 | d5970055 | Michael S. Tsirkin | uint64_t start = MAX(mfirst, rfirst); |
24 | d5970055 | Michael S. Tsirkin | uint64_t end = MIN(mlast, rlast); |
25 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *from = dev->log + start / VHOST_LOG_CHUNK; |
26 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *to = dev->log + end / VHOST_LOG_CHUNK + 1;
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27 | d5970055 | Michael S. Tsirkin | uint64_t addr = (start / VHOST_LOG_CHUNK) * VHOST_LOG_CHUNK; |
28 | d5970055 | Michael S. Tsirkin | |
29 | d5970055 | Michael S. Tsirkin | assert(end / VHOST_LOG_CHUNK < dev->log_size); |
30 | d5970055 | Michael S. Tsirkin | assert(start / VHOST_LOG_CHUNK < dev->log_size); |
31 | d5970055 | Michael S. Tsirkin | if (end < start) {
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32 | d5970055 | Michael S. Tsirkin | return;
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33 | d5970055 | Michael S. Tsirkin | } |
34 | d5970055 | Michael S. Tsirkin | for (;from < to; ++from) {
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35 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t log; |
36 | d5970055 | Michael S. Tsirkin | int bit;
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37 | d5970055 | Michael S. Tsirkin | /* We first check with non-atomic: much cheaper,
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38 | d5970055 | Michael S. Tsirkin | * and we expect non-dirty to be the common case. */
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39 | d5970055 | Michael S. Tsirkin | if (!*from) {
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40 | 0c600ce2 | Jason Wang | addr += VHOST_LOG_CHUNK; |
41 | d5970055 | Michael S. Tsirkin | continue;
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42 | d5970055 | Michael S. Tsirkin | } |
43 | d5970055 | Michael S. Tsirkin | /* Data must be read atomically. We don't really
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44 | d5970055 | Michael S. Tsirkin | * need the barrier semantics of __sync
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45 | d5970055 | Michael S. Tsirkin | * builtins, but it's easier to use them than
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46 | d5970055 | Michael S. Tsirkin | * roll our own. */
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47 | d5970055 | Michael S. Tsirkin | log = __sync_fetch_and_and(from, 0);
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48 | d5970055 | Michael S. Tsirkin | while ((bit = sizeof(log) > sizeof(int) ? |
49 | d5970055 | Michael S. Tsirkin | ffsll(log) : ffs(log))) { |
50 | 7b67b18a | Michael S. Tsirkin | ram_addr_t ram_addr; |
51 | d5970055 | Michael S. Tsirkin | bit -= 1;
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52 | 7b67b18a | Michael S. Tsirkin | ram_addr = cpu_get_physical_page_desc(addr + bit * VHOST_LOG_PAGE); |
53 | 7b67b18a | Michael S. Tsirkin | cpu_physical_memory_set_dirty(ram_addr); |
54 | d5970055 | Michael S. Tsirkin | log &= ~(0x1ull << bit);
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55 | d5970055 | Michael S. Tsirkin | } |
56 | d5970055 | Michael S. Tsirkin | addr += VHOST_LOG_CHUNK; |
57 | d5970055 | Michael S. Tsirkin | } |
58 | d5970055 | Michael S. Tsirkin | } |
59 | d5970055 | Michael S. Tsirkin | |
60 | d5970055 | Michael S. Tsirkin | static int vhost_client_sync_dirty_bitmap(CPUPhysMemoryClient *client, |
61 | d5970055 | Michael S. Tsirkin | target_phys_addr_t start_addr, |
62 | d5970055 | Michael S. Tsirkin | target_phys_addr_t end_addr) |
63 | d5970055 | Michael S. Tsirkin | { |
64 | d5970055 | Michael S. Tsirkin | struct vhost_dev *dev = container_of(client, struct vhost_dev, client); |
65 | d5970055 | Michael S. Tsirkin | int i;
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66 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled || !dev->started) {
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67 | d5970055 | Michael S. Tsirkin | return 0; |
68 | d5970055 | Michael S. Tsirkin | } |
69 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
70 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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71 | d5970055 | Michael S. Tsirkin | vhost_dev_sync_region(dev, start_addr, end_addr, |
72 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr, |
73 | d5970055 | Michael S. Tsirkin | range_get_last(reg->guest_phys_addr, |
74 | d5970055 | Michael S. Tsirkin | reg->memory_size)); |
75 | d5970055 | Michael S. Tsirkin | } |
76 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
77 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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78 | d5970055 | Michael S. Tsirkin | vhost_dev_sync_region(dev, start_addr, end_addr, vq->used_phys, |
79 | d5970055 | Michael S. Tsirkin | range_get_last(vq->used_phys, vq->used_size)); |
80 | d5970055 | Michael S. Tsirkin | } |
81 | d5970055 | Michael S. Tsirkin | return 0; |
82 | d5970055 | Michael S. Tsirkin | } |
83 | d5970055 | Michael S. Tsirkin | |
84 | d5970055 | Michael S. Tsirkin | /* Assign/unassign. Keep an unsorted array of non-overlapping
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85 | d5970055 | Michael S. Tsirkin | * memory regions in dev->mem. */
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86 | d5970055 | Michael S. Tsirkin | static void vhost_dev_unassign_memory(struct vhost_dev *dev, |
87 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
88 | d5970055 | Michael S. Tsirkin | uint64_t size) |
89 | d5970055 | Michael S. Tsirkin | { |
90 | d5970055 | Michael S. Tsirkin | int from, to, n = dev->mem->nregions;
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91 | d5970055 | Michael S. Tsirkin | /* Track overlapping/split regions for sanity checking. */
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92 | d5970055 | Michael S. Tsirkin | int overlap_start = 0, overlap_end = 0, overlap_middle = 0, split = 0; |
93 | d5970055 | Michael S. Tsirkin | |
94 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < n; ++from, ++to) { |
95 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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96 | d5970055 | Michael S. Tsirkin | uint64_t reglast; |
97 | d5970055 | Michael S. Tsirkin | uint64_t memlast; |
98 | d5970055 | Michael S. Tsirkin | uint64_t change; |
99 | d5970055 | Michael S. Tsirkin | |
100 | d5970055 | Michael S. Tsirkin | /* clone old region */
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101 | d5970055 | Michael S. Tsirkin | if (to != from) {
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102 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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103 | d5970055 | Michael S. Tsirkin | } |
104 | d5970055 | Michael S. Tsirkin | |
105 | d5970055 | Michael S. Tsirkin | /* No overlap is simple */
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106 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(reg->guest_phys_addr, reg->memory_size,
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107 | d5970055 | Michael S. Tsirkin | start_addr, size)) { |
108 | d5970055 | Michael S. Tsirkin | continue;
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109 | d5970055 | Michael S. Tsirkin | } |
110 | d5970055 | Michael S. Tsirkin | |
111 | d5970055 | Michael S. Tsirkin | /* Split only happens if supplied region
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112 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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113 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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114 | d5970055 | Michael S. Tsirkin | assert(!split); |
115 | d5970055 | Michael S. Tsirkin | |
116 | d5970055 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
117 | d5970055 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
118 | d5970055 | Michael S. Tsirkin | |
119 | d5970055 | Michael S. Tsirkin | /* Remove whole region */
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120 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr && memlast >= reglast) {
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121 | d5970055 | Michael S. Tsirkin | --dev->mem->nregions; |
122 | d5970055 | Michael S. Tsirkin | --to; |
123 | d5970055 | Michael S. Tsirkin | assert(to >= 0);
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124 | d5970055 | Michael S. Tsirkin | ++overlap_middle; |
125 | d5970055 | Michael S. Tsirkin | continue;
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126 | d5970055 | Michael S. Tsirkin | } |
127 | d5970055 | Michael S. Tsirkin | |
128 | d5970055 | Michael S. Tsirkin | /* Shrink region */
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129 | d5970055 | Michael S. Tsirkin | if (memlast >= reglast) {
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130 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
131 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
132 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
133 | d5970055 | Michael S. Tsirkin | ++overlap_end; |
134 | d5970055 | Michael S. Tsirkin | continue;
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135 | d5970055 | Michael S. Tsirkin | } |
136 | d5970055 | Michael S. Tsirkin | |
137 | d5970055 | Michael S. Tsirkin | /* Shift region */
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138 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr) {
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139 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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140 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
141 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
142 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
143 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
144 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
145 | d5970055 | Michael S. Tsirkin | ++overlap_start; |
146 | d5970055 | Michael S. Tsirkin | continue;
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147 | d5970055 | Michael S. Tsirkin | } |
148 | d5970055 | Michael S. Tsirkin | |
149 | d5970055 | Michael S. Tsirkin | /* This only happens if supplied region
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150 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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151 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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152 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
153 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
154 | d5970055 | Michael S. Tsirkin | assert(!overlap_middle); |
155 | d5970055 | Michael S. Tsirkin | /* Split region: shrink first part, shift second part. */
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156 | d5970055 | Michael S. Tsirkin | memcpy(dev->mem->regions + n, reg, sizeof *reg);
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157 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
158 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
159 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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160 | d5970055 | Michael S. Tsirkin | reg = dev->mem->regions + n; |
161 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
162 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
163 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
164 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
165 | d5970055 | Michael S. Tsirkin | /* Never add more than 1 region */
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166 | d5970055 | Michael S. Tsirkin | assert(dev->mem->nregions == n); |
167 | d5970055 | Michael S. Tsirkin | ++dev->mem->nregions; |
168 | d5970055 | Michael S. Tsirkin | ++split; |
169 | d5970055 | Michael S. Tsirkin | } |
170 | d5970055 | Michael S. Tsirkin | } |
171 | d5970055 | Michael S. Tsirkin | |
172 | d5970055 | Michael S. Tsirkin | /* Called after unassign, so no regions overlap the given range. */
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173 | d5970055 | Michael S. Tsirkin | static void vhost_dev_assign_memory(struct vhost_dev *dev, |
174 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
175 | d5970055 | Michael S. Tsirkin | uint64_t size, |
176 | d5970055 | Michael S. Tsirkin | uint64_t uaddr) |
177 | d5970055 | Michael S. Tsirkin | { |
178 | d5970055 | Michael S. Tsirkin | int from, to;
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179 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *merged = NULL; |
180 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < dev->mem->nregions; ++from, ++to) { |
181 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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182 | d5970055 | Michael S. Tsirkin | uint64_t prlast, urlast; |
183 | d5970055 | Michael S. Tsirkin | uint64_t pmlast, umlast; |
184 | d5970055 | Michael S. Tsirkin | uint64_t s, e, u; |
185 | d5970055 | Michael S. Tsirkin | |
186 | d5970055 | Michael S. Tsirkin | /* clone old region */
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187 | d5970055 | Michael S. Tsirkin | if (to != from) {
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188 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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189 | d5970055 | Michael S. Tsirkin | } |
190 | d5970055 | Michael S. Tsirkin | prlast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
191 | d5970055 | Michael S. Tsirkin | pmlast = range_get_last(start_addr, size); |
192 | d5970055 | Michael S. Tsirkin | urlast = range_get_last(reg->userspace_addr, reg->memory_size); |
193 | d5970055 | Michael S. Tsirkin | umlast = range_get_last(uaddr, size); |
194 | d5970055 | Michael S. Tsirkin | |
195 | d5970055 | Michael S. Tsirkin | /* check for overlapping regions: should never happen. */
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196 | d5970055 | Michael S. Tsirkin | assert(prlast < start_addr || pmlast < reg->guest_phys_addr); |
197 | d5970055 | Michael S. Tsirkin | /* Not an adjacent or overlapping region - do not merge. */
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198 | d5970055 | Michael S. Tsirkin | if ((prlast + 1 != start_addr || urlast + 1 != uaddr) && |
199 | d5970055 | Michael S. Tsirkin | (pmlast + 1 != reg->guest_phys_addr ||
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200 | d5970055 | Michael S. Tsirkin | umlast + 1 != reg->userspace_addr)) {
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201 | d5970055 | Michael S. Tsirkin | continue;
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202 | d5970055 | Michael S. Tsirkin | } |
203 | d5970055 | Michael S. Tsirkin | |
204 | d5970055 | Michael S. Tsirkin | if (merged) {
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205 | d5970055 | Michael S. Tsirkin | --to; |
206 | d5970055 | Michael S. Tsirkin | assert(to >= 0);
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207 | d5970055 | Michael S. Tsirkin | } else {
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208 | d5970055 | Michael S. Tsirkin | merged = reg; |
209 | d5970055 | Michael S. Tsirkin | } |
210 | d5970055 | Michael S. Tsirkin | u = MIN(uaddr, reg->userspace_addr); |
211 | d5970055 | Michael S. Tsirkin | s = MIN(start_addr, reg->guest_phys_addr); |
212 | d5970055 | Michael S. Tsirkin | e = MAX(pmlast, prlast); |
213 | d5970055 | Michael S. Tsirkin | uaddr = merged->userspace_addr = u; |
214 | d5970055 | Michael S. Tsirkin | start_addr = merged->guest_phys_addr = s; |
215 | d5970055 | Michael S. Tsirkin | size = merged->memory_size = e - s + 1;
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216 | d5970055 | Michael S. Tsirkin | assert(merged->memory_size); |
217 | d5970055 | Michael S. Tsirkin | } |
218 | d5970055 | Michael S. Tsirkin | |
219 | d5970055 | Michael S. Tsirkin | if (!merged) {
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220 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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221 | d5970055 | Michael S. Tsirkin | memset(reg, 0, sizeof *reg); |
222 | d5970055 | Michael S. Tsirkin | reg->memory_size = size; |
223 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
224 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr = start_addr; |
225 | d5970055 | Michael S. Tsirkin | reg->userspace_addr = uaddr; |
226 | d5970055 | Michael S. Tsirkin | ++to; |
227 | d5970055 | Michael S. Tsirkin | } |
228 | d5970055 | Michael S. Tsirkin | assert(to <= dev->mem->nregions + 1);
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229 | d5970055 | Michael S. Tsirkin | dev->mem->nregions = to; |
230 | d5970055 | Michael S. Tsirkin | } |
231 | d5970055 | Michael S. Tsirkin | |
232 | d5970055 | Michael S. Tsirkin | static uint64_t vhost_get_log_size(struct vhost_dev *dev) |
233 | d5970055 | Michael S. Tsirkin | { |
234 | d5970055 | Michael S. Tsirkin | uint64_t log_size = 0;
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235 | d5970055 | Michael S. Tsirkin | int i;
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236 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
237 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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238 | d5970055 | Michael S. Tsirkin | uint64_t last = range_get_last(reg->guest_phys_addr, |
239 | d5970055 | Michael S. Tsirkin | reg->memory_size); |
240 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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241 | d5970055 | Michael S. Tsirkin | } |
242 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
243 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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244 | d5970055 | Michael S. Tsirkin | uint64_t last = vq->used_phys + vq->used_size - 1;
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245 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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246 | d5970055 | Michael S. Tsirkin | } |
247 | d5970055 | Michael S. Tsirkin | return log_size;
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248 | d5970055 | Michael S. Tsirkin | } |
249 | d5970055 | Michael S. Tsirkin | |
250 | d5970055 | Michael S. Tsirkin | static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size) |
251 | d5970055 | Michael S. Tsirkin | { |
252 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *log; |
253 | d5970055 | Michael S. Tsirkin | uint64_t log_base; |
254 | d5970055 | Michael S. Tsirkin | int r;
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255 | d5970055 | Michael S. Tsirkin | if (size) {
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256 | d5970055 | Michael S. Tsirkin | log = qemu_mallocz(size * sizeof *log);
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257 | d5970055 | Michael S. Tsirkin | } else {
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258 | d5970055 | Michael S. Tsirkin | log = NULL;
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259 | d5970055 | Michael S. Tsirkin | } |
260 | d5970055 | Michael S. Tsirkin | log_base = (uint64_t)(unsigned long)log; |
261 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base); |
262 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
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263 | d5970055 | Michael S. Tsirkin | vhost_client_sync_dirty_bitmap(&dev->client, 0,
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264 | d5970055 | Michael S. Tsirkin | (target_phys_addr_t)~0x0ull);
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265 | d5970055 | Michael S. Tsirkin | if (dev->log) {
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266 | d5970055 | Michael S. Tsirkin | qemu_free(dev->log); |
267 | d5970055 | Michael S. Tsirkin | } |
268 | d5970055 | Michael S. Tsirkin | dev->log = log; |
269 | d5970055 | Michael S. Tsirkin | dev->log_size = size; |
270 | d5970055 | Michael S. Tsirkin | } |
271 | d5970055 | Michael S. Tsirkin | |
272 | d5970055 | Michael S. Tsirkin | static int vhost_verify_ring_mappings(struct vhost_dev *dev, |
273 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
274 | d5970055 | Michael S. Tsirkin | uint64_t size) |
275 | d5970055 | Michael S. Tsirkin | { |
276 | d5970055 | Michael S. Tsirkin | int i;
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277 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
278 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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279 | d5970055 | Michael S. Tsirkin | target_phys_addr_t l; |
280 | d5970055 | Michael S. Tsirkin | void *p;
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281 | d5970055 | Michael S. Tsirkin | |
282 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(start_addr, size, vq->ring_phys, vq->ring_size)) {
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283 | d5970055 | Michael S. Tsirkin | continue;
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284 | d5970055 | Michael S. Tsirkin | } |
285 | d5970055 | Michael S. Tsirkin | l = vq->ring_size; |
286 | d5970055 | Michael S. Tsirkin | p = cpu_physical_memory_map(vq->ring_phys, &l, 1);
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287 | d5970055 | Michael S. Tsirkin | if (!p || l != vq->ring_size) {
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288 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Unable to map ring buffer for ring %d\n", i);
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289 | d5970055 | Michael S. Tsirkin | return -ENOMEM;
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290 | d5970055 | Michael S. Tsirkin | } |
291 | d5970055 | Michael S. Tsirkin | if (p != vq->ring) {
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292 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Ring buffer relocated for ring %d\n", i);
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293 | d5970055 | Michael S. Tsirkin | return -EBUSY;
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294 | d5970055 | Michael S. Tsirkin | } |
295 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(p, l, 0, 0); |
296 | d5970055 | Michael S. Tsirkin | } |
297 | d5970055 | Michael S. Tsirkin | return 0; |
298 | d5970055 | Michael S. Tsirkin | } |
299 | d5970055 | Michael S. Tsirkin | |
300 | 4e789564 | Michael S. Tsirkin | static struct vhost_memory_region *vhost_dev_find_reg(struct vhost_dev *dev, |
301 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
302 | 4e789564 | Michael S. Tsirkin | uint64_t size) |
303 | 4e789564 | Michael S. Tsirkin | { |
304 | 4e789564 | Michael S. Tsirkin | int i, n = dev->mem->nregions;
|
305 | 4e789564 | Michael S. Tsirkin | for (i = 0; i < n; ++i) { |
306 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
|
307 | 4e789564 | Michael S. Tsirkin | if (ranges_overlap(reg->guest_phys_addr, reg->memory_size,
|
308 | 4e789564 | Michael S. Tsirkin | start_addr, size)) { |
309 | 4e789564 | Michael S. Tsirkin | return reg;
|
310 | 4e789564 | Michael S. Tsirkin | } |
311 | 4e789564 | Michael S. Tsirkin | } |
312 | 4e789564 | Michael S. Tsirkin | return NULL; |
313 | 4e789564 | Michael S. Tsirkin | } |
314 | 4e789564 | Michael S. Tsirkin | |
315 | 4e789564 | Michael S. Tsirkin | static bool vhost_dev_cmp_memory(struct vhost_dev *dev, |
316 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
317 | 4e789564 | Michael S. Tsirkin | uint64_t size, |
318 | 4e789564 | Michael S. Tsirkin | uint64_t uaddr) |
319 | 4e789564 | Michael S. Tsirkin | { |
320 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = vhost_dev_find_reg(dev, start_addr, size);
|
321 | 4e789564 | Michael S. Tsirkin | uint64_t reglast; |
322 | 4e789564 | Michael S. Tsirkin | uint64_t memlast; |
323 | 4e789564 | Michael S. Tsirkin | |
324 | 4e789564 | Michael S. Tsirkin | if (!reg) {
|
325 | 4e789564 | Michael S. Tsirkin | return true; |
326 | 4e789564 | Michael S. Tsirkin | } |
327 | 4e789564 | Michael S. Tsirkin | |
328 | 4e789564 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
329 | 4e789564 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
330 | 4e789564 | Michael S. Tsirkin | |
331 | 4e789564 | Michael S. Tsirkin | /* Need to extend region? */
|
332 | 4e789564 | Michael S. Tsirkin | if (start_addr < reg->guest_phys_addr || memlast > reglast) {
|
333 | 4e789564 | Michael S. Tsirkin | return true; |
334 | 4e789564 | Michael S. Tsirkin | } |
335 | 4e789564 | Michael S. Tsirkin | /* userspace_addr changed? */
|
336 | 4e789564 | Michael S. Tsirkin | return uaddr != reg->userspace_addr + start_addr - reg->guest_phys_addr;
|
337 | 4e789564 | Michael S. Tsirkin | } |
338 | 4e789564 | Michael S. Tsirkin | |
339 | d5970055 | Michael S. Tsirkin | static void vhost_client_set_memory(CPUPhysMemoryClient *client, |
340 | d5970055 | Michael S. Tsirkin | target_phys_addr_t start_addr, |
341 | d5970055 | Michael S. Tsirkin | ram_addr_t size, |
342 | 0fd542fb | Michael S. Tsirkin | ram_addr_t phys_offset, |
343 | 0fd542fb | Michael S. Tsirkin | bool log_dirty)
|
344 | d5970055 | Michael S. Tsirkin | { |
345 | d5970055 | Michael S. Tsirkin | struct vhost_dev *dev = container_of(client, struct vhost_dev, client); |
346 | d5970055 | Michael S. Tsirkin | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
347 | d5970055 | Michael S. Tsirkin | int s = offsetof(struct vhost_memory, regions) + |
348 | d5970055 | Michael S. Tsirkin | (dev->mem->nregions + 1) * sizeof dev->mem->regions[0]; |
349 | d5970055 | Michael S. Tsirkin | uint64_t log_size; |
350 | d5970055 | Michael S. Tsirkin | int r;
|
351 | 4e789564 | Michael S. Tsirkin | |
352 | d5970055 | Michael S. Tsirkin | dev->mem = qemu_realloc(dev->mem, s); |
353 | d5970055 | Michael S. Tsirkin | |
354 | f5a4e64f | Michael S. Tsirkin | if (log_dirty) {
|
355 | f5a4e64f | Michael S. Tsirkin | flags = IO_MEM_UNASSIGNED; |
356 | f5a4e64f | Michael S. Tsirkin | } |
357 | f5a4e64f | Michael S. Tsirkin | |
358 | d5970055 | Michael S. Tsirkin | assert(size); |
359 | d5970055 | Michael S. Tsirkin | |
360 | 4e789564 | Michael S. Tsirkin | /* Optimize no-change case. At least cirrus_vga does this a lot at this time. */
|
361 | 4e789564 | Michael S. Tsirkin | if (flags == IO_MEM_RAM) {
|
362 | 4e789564 | Michael S. Tsirkin | if (!vhost_dev_cmp_memory(dev, start_addr, size,
|
363 | 4e789564 | Michael S. Tsirkin | (uintptr_t)qemu_get_ram_ptr(phys_offset))) { |
364 | 4e789564 | Michael S. Tsirkin | /* Region exists with same address. Nothing to do. */
|
365 | 4e789564 | Michael S. Tsirkin | return;
|
366 | 4e789564 | Michael S. Tsirkin | } |
367 | 4e789564 | Michael S. Tsirkin | } else {
|
368 | 4e789564 | Michael S. Tsirkin | if (!vhost_dev_find_reg(dev, start_addr, size)) {
|
369 | 4e789564 | Michael S. Tsirkin | /* Removing region that we don't access. Nothing to do. */
|
370 | 4e789564 | Michael S. Tsirkin | return;
|
371 | 4e789564 | Michael S. Tsirkin | } |
372 | 4e789564 | Michael S. Tsirkin | } |
373 | 4e789564 | Michael S. Tsirkin | |
374 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
375 | d5970055 | Michael S. Tsirkin | if (flags == IO_MEM_RAM) {
|
376 | d5970055 | Michael S. Tsirkin | /* Add given mapping, merging adjacent regions if any */
|
377 | d5970055 | Michael S. Tsirkin | vhost_dev_assign_memory(dev, start_addr, size, |
378 | d5970055 | Michael S. Tsirkin | (uintptr_t)qemu_get_ram_ptr(phys_offset)); |
379 | d5970055 | Michael S. Tsirkin | } else {
|
380 | d5970055 | Michael S. Tsirkin | /* Remove old mapping for this memory, if any. */
|
381 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
382 | d5970055 | Michael S. Tsirkin | } |
383 | d5970055 | Michael S. Tsirkin | |
384 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
385 | d5970055 | Michael S. Tsirkin | return;
|
386 | d5970055 | Michael S. Tsirkin | } |
387 | d5970055 | Michael S. Tsirkin | |
388 | d5970055 | Michael S. Tsirkin | if (dev->started) {
|
389 | d5970055 | Michael S. Tsirkin | r = vhost_verify_ring_mappings(dev, start_addr, size); |
390 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
391 | d5970055 | Michael S. Tsirkin | } |
392 | d5970055 | Michael S. Tsirkin | |
393 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled) {
|
394 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
395 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
396 | d5970055 | Michael S. Tsirkin | return;
|
397 | d5970055 | Michael S. Tsirkin | } |
398 | d5970055 | Michael S. Tsirkin | log_size = vhost_get_log_size(dev); |
399 | d5970055 | Michael S. Tsirkin | /* We allocate an extra 4K bytes to log,
|
400 | d5970055 | Michael S. Tsirkin | * to reduce the * number of reallocations. */
|
401 | d5970055 | Michael S. Tsirkin | #define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log) |
402 | d5970055 | Michael S. Tsirkin | /* To log more, must increase log size before table update. */
|
403 | d5970055 | Michael S. Tsirkin | if (dev->log_size < log_size) {
|
404 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER); |
405 | d5970055 | Michael S. Tsirkin | } |
406 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
407 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
408 | d5970055 | Michael S. Tsirkin | /* To log less, can only decrease log size after table update. */
|
409 | d5970055 | Michael S. Tsirkin | if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
|
410 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size); |
411 | d5970055 | Michael S. Tsirkin | } |
412 | d5970055 | Michael S. Tsirkin | } |
413 | d5970055 | Michael S. Tsirkin | |
414 | d5970055 | Michael S. Tsirkin | static int vhost_virtqueue_set_addr(struct vhost_dev *dev, |
415 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
416 | d5970055 | Michael S. Tsirkin | unsigned idx, bool enable_log) |
417 | d5970055 | Michael S. Tsirkin | { |
418 | d5970055 | Michael S. Tsirkin | struct vhost_vring_addr addr = {
|
419 | d5970055 | Michael S. Tsirkin | .index = idx, |
420 | 2b3af999 | Stefan Weil | .desc_user_addr = (uint64_t)(unsigned long)vq->desc, |
421 | 2b3af999 | Stefan Weil | .avail_user_addr = (uint64_t)(unsigned long)vq->avail, |
422 | 2b3af999 | Stefan Weil | .used_user_addr = (uint64_t)(unsigned long)vq->used, |
423 | d5970055 | Michael S. Tsirkin | .log_guest_addr = vq->used_phys, |
424 | d5970055 | Michael S. Tsirkin | .flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0, |
425 | d5970055 | Michael S. Tsirkin | }; |
426 | d5970055 | Michael S. Tsirkin | int r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
|
427 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
428 | d5970055 | Michael S. Tsirkin | return -errno;
|
429 | d5970055 | Michael S. Tsirkin | } |
430 | d5970055 | Michael S. Tsirkin | return 0; |
431 | d5970055 | Michael S. Tsirkin | } |
432 | d5970055 | Michael S. Tsirkin | |
433 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log) |
434 | d5970055 | Michael S. Tsirkin | { |
435 | d5970055 | Michael S. Tsirkin | uint64_t features = dev->acked_features; |
436 | d5970055 | Michael S. Tsirkin | int r;
|
437 | d5970055 | Michael S. Tsirkin | if (enable_log) {
|
438 | d5970055 | Michael S. Tsirkin | features |= 0x1 << VHOST_F_LOG_ALL;
|
439 | d5970055 | Michael S. Tsirkin | } |
440 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_FEATURES, &features); |
441 | d5970055 | Michael S. Tsirkin | return r < 0 ? -errno : 0; |
442 | d5970055 | Michael S. Tsirkin | } |
443 | d5970055 | Michael S. Tsirkin | |
444 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) |
445 | d5970055 | Michael S. Tsirkin | { |
446 | d5970055 | Michael S. Tsirkin | int r, t, i;
|
447 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(dev, enable_log); |
448 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
449 | d5970055 | Michael S. Tsirkin | goto err_features;
|
450 | d5970055 | Michael S. Tsirkin | } |
451 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
452 | d5970055 | Michael S. Tsirkin | r = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
453 | d5970055 | Michael S. Tsirkin | enable_log); |
454 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
455 | d5970055 | Michael S. Tsirkin | goto err_vq;
|
456 | d5970055 | Michael S. Tsirkin | } |
457 | d5970055 | Michael S. Tsirkin | } |
458 | d5970055 | Michael S. Tsirkin | return 0; |
459 | d5970055 | Michael S. Tsirkin | err_vq:
|
460 | d5970055 | Michael S. Tsirkin | for (; i >= 0; --i) { |
461 | d5970055 | Michael S. Tsirkin | t = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
462 | d5970055 | Michael S. Tsirkin | dev->log_enabled); |
463 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
464 | d5970055 | Michael S. Tsirkin | } |
465 | d5970055 | Michael S. Tsirkin | t = vhost_dev_set_features(dev, dev->log_enabled); |
466 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
467 | d5970055 | Michael S. Tsirkin | err_features:
|
468 | d5970055 | Michael S. Tsirkin | return r;
|
469 | d5970055 | Michael S. Tsirkin | } |
470 | d5970055 | Michael S. Tsirkin | |
471 | d5970055 | Michael S. Tsirkin | static int vhost_client_migration_log(CPUPhysMemoryClient *client, |
472 | d5970055 | Michael S. Tsirkin | int enable)
|
473 | d5970055 | Michael S. Tsirkin | { |
474 | d5970055 | Michael S. Tsirkin | struct vhost_dev *dev = container_of(client, struct vhost_dev, client); |
475 | d5970055 | Michael S. Tsirkin | int r;
|
476 | d5970055 | Michael S. Tsirkin | if (!!enable == dev->log_enabled) {
|
477 | d5970055 | Michael S. Tsirkin | return 0; |
478 | d5970055 | Michael S. Tsirkin | } |
479 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
480 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
481 | d5970055 | Michael S. Tsirkin | return 0; |
482 | d5970055 | Michael S. Tsirkin | } |
483 | d5970055 | Michael S. Tsirkin | if (!enable) {
|
484 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, false);
|
485 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
486 | d5970055 | Michael S. Tsirkin | return r;
|
487 | d5970055 | Michael S. Tsirkin | } |
488 | d5970055 | Michael S. Tsirkin | if (dev->log) {
|
489 | d5970055 | Michael S. Tsirkin | qemu_free(dev->log); |
490 | d5970055 | Michael S. Tsirkin | } |
491 | d5970055 | Michael S. Tsirkin | dev->log = NULL;
|
492 | d5970055 | Michael S. Tsirkin | dev->log_size = 0;
|
493 | d5970055 | Michael S. Tsirkin | } else {
|
494 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, vhost_get_log_size(dev)); |
495 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, true);
|
496 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
497 | d5970055 | Michael S. Tsirkin | return r;
|
498 | d5970055 | Michael S. Tsirkin | } |
499 | d5970055 | Michael S. Tsirkin | } |
500 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
501 | d5970055 | Michael S. Tsirkin | return 0; |
502 | d5970055 | Michael S. Tsirkin | } |
503 | d5970055 | Michael S. Tsirkin | |
504 | d5970055 | Michael S. Tsirkin | static int vhost_virtqueue_init(struct vhost_dev *dev, |
505 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
506 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
507 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
508 | d5970055 | Michael S. Tsirkin | { |
509 | d5970055 | Michael S. Tsirkin | target_phys_addr_t s, l, a; |
510 | d5970055 | Michael S. Tsirkin | int r;
|
511 | d5970055 | Michael S. Tsirkin | struct vhost_vring_file file = {
|
512 | d5970055 | Michael S. Tsirkin | .index = idx, |
513 | d5970055 | Michael S. Tsirkin | }; |
514 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
515 | d5970055 | Michael S. Tsirkin | .index = idx, |
516 | d5970055 | Michael S. Tsirkin | }; |
517 | d5970055 | Michael S. Tsirkin | struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
|
518 | d5970055 | Michael S. Tsirkin | |
519 | d5970055 | Michael S. Tsirkin | if (!vdev->binding->set_host_notifier) {
|
520 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "binding does not support host notifiers\n");
|
521 | d5970055 | Michael S. Tsirkin | return -ENOSYS;
|
522 | d5970055 | Michael S. Tsirkin | } |
523 | d5970055 | Michael S. Tsirkin | |
524 | d5970055 | Michael S. Tsirkin | vq->num = state.num = virtio_queue_get_num(vdev, idx); |
525 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state); |
526 | d5970055 | Michael S. Tsirkin | if (r) {
|
527 | d5970055 | Michael S. Tsirkin | return -errno;
|
528 | d5970055 | Michael S. Tsirkin | } |
529 | d5970055 | Michael S. Tsirkin | |
530 | d5970055 | Michael S. Tsirkin | state.num = virtio_queue_get_last_avail_idx(vdev, idx); |
531 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state); |
532 | d5970055 | Michael S. Tsirkin | if (r) {
|
533 | d5970055 | Michael S. Tsirkin | return -errno;
|
534 | d5970055 | Michael S. Tsirkin | } |
535 | d5970055 | Michael S. Tsirkin | |
536 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_desc_size(vdev, idx); |
537 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_desc_addr(vdev, idx); |
538 | d5970055 | Michael S. Tsirkin | vq->desc = cpu_physical_memory_map(a, &l, 0);
|
539 | d5970055 | Michael S. Tsirkin | if (!vq->desc || l != s) {
|
540 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
541 | d5970055 | Michael S. Tsirkin | goto fail_alloc_desc;
|
542 | d5970055 | Michael S. Tsirkin | } |
543 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_avail_size(vdev, idx); |
544 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_avail_addr(vdev, idx); |
545 | d5970055 | Michael S. Tsirkin | vq->avail = cpu_physical_memory_map(a, &l, 0);
|
546 | d5970055 | Michael S. Tsirkin | if (!vq->avail || l != s) {
|
547 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
548 | d5970055 | Michael S. Tsirkin | goto fail_alloc_avail;
|
549 | d5970055 | Michael S. Tsirkin | } |
550 | d5970055 | Michael S. Tsirkin | vq->used_size = s = l = virtio_queue_get_used_size(vdev, idx); |
551 | d5970055 | Michael S. Tsirkin | vq->used_phys = a = virtio_queue_get_used_addr(vdev, idx); |
552 | d5970055 | Michael S. Tsirkin | vq->used = cpu_physical_memory_map(a, &l, 1);
|
553 | d5970055 | Michael S. Tsirkin | if (!vq->used || l != s) {
|
554 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
555 | d5970055 | Michael S. Tsirkin | goto fail_alloc_used;
|
556 | d5970055 | Michael S. Tsirkin | } |
557 | d5970055 | Michael S. Tsirkin | |
558 | d5970055 | Michael S. Tsirkin | vq->ring_size = s = l = virtio_queue_get_ring_size(vdev, idx); |
559 | d5970055 | Michael S. Tsirkin | vq->ring_phys = a = virtio_queue_get_ring_addr(vdev, idx); |
560 | d5970055 | Michael S. Tsirkin | vq->ring = cpu_physical_memory_map(a, &l, 1);
|
561 | d5970055 | Michael S. Tsirkin | if (!vq->ring || l != s) {
|
562 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
563 | d5970055 | Michael S. Tsirkin | goto fail_alloc_ring;
|
564 | d5970055 | Michael S. Tsirkin | } |
565 | d5970055 | Michael S. Tsirkin | |
566 | d5970055 | Michael S. Tsirkin | r = vhost_virtqueue_set_addr(dev, vq, idx, dev->log_enabled); |
567 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
568 | d5970055 | Michael S. Tsirkin | r = -errno; |
569 | d5970055 | Michael S. Tsirkin | goto fail_alloc;
|
570 | d5970055 | Michael S. Tsirkin | } |
571 | d5970055 | Michael S. Tsirkin | r = vdev->binding->set_host_notifier(vdev->binding_opaque, idx, true);
|
572 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
573 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Error binding host notifier: %d\n", -r);
|
574 | d5970055 | Michael S. Tsirkin | goto fail_host_notifier;
|
575 | d5970055 | Michael S. Tsirkin | } |
576 | d5970055 | Michael S. Tsirkin | |
577 | d5970055 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq)); |
578 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file); |
579 | d5970055 | Michael S. Tsirkin | if (r) {
|
580 | c8852121 | Michael S. Tsirkin | r = -errno; |
581 | d5970055 | Michael S. Tsirkin | goto fail_kick;
|
582 | d5970055 | Michael S. Tsirkin | } |
583 | d5970055 | Michael S. Tsirkin | |
584 | d5970055 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq)); |
585 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file); |
586 | d5970055 | Michael S. Tsirkin | if (r) {
|
587 | c8852121 | Michael S. Tsirkin | r = -errno; |
588 | d5970055 | Michael S. Tsirkin | goto fail_call;
|
589 | d5970055 | Michael S. Tsirkin | } |
590 | d5970055 | Michael S. Tsirkin | |
591 | d5970055 | Michael S. Tsirkin | return 0; |
592 | d5970055 | Michael S. Tsirkin | |
593 | d5970055 | Michael S. Tsirkin | fail_call:
|
594 | d5970055 | Michael S. Tsirkin | fail_kick:
|
595 | d5970055 | Michael S. Tsirkin | vdev->binding->set_host_notifier(vdev->binding_opaque, idx, false);
|
596 | d5970055 | Michael S. Tsirkin | fail_host_notifier:
|
597 | d5970055 | Michael S. Tsirkin | fail_alloc:
|
598 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
599 | d5970055 | Michael S. Tsirkin | 0, 0); |
600 | d5970055 | Michael S. Tsirkin | fail_alloc_ring:
|
601 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
602 | d5970055 | Michael S. Tsirkin | 0, 0); |
603 | d5970055 | Michael S. Tsirkin | fail_alloc_used:
|
604 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
605 | d5970055 | Michael S. Tsirkin | 0, 0); |
606 | d5970055 | Michael S. Tsirkin | fail_alloc_avail:
|
607 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
608 | d5970055 | Michael S. Tsirkin | 0, 0); |
609 | d5970055 | Michael S. Tsirkin | fail_alloc_desc:
|
610 | d5970055 | Michael S. Tsirkin | return r;
|
611 | d5970055 | Michael S. Tsirkin | } |
612 | d5970055 | Michael S. Tsirkin | |
613 | d5970055 | Michael S. Tsirkin | static void vhost_virtqueue_cleanup(struct vhost_dev *dev, |
614 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
615 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
616 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
617 | d5970055 | Michael S. Tsirkin | { |
618 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
619 | d5970055 | Michael S. Tsirkin | .index = idx, |
620 | d5970055 | Michael S. Tsirkin | }; |
621 | d5970055 | Michael S. Tsirkin | int r;
|
622 | d5970055 | Michael S. Tsirkin | r = vdev->binding->set_host_notifier(vdev->binding_opaque, idx, false);
|
623 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
624 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d host cleanup failed: %d\n", idx, r);
|
625 | d5970055 | Michael S. Tsirkin | fflush(stderr); |
626 | d5970055 | Michael S. Tsirkin | } |
627 | d5970055 | Michael S. Tsirkin | assert (r >= 0);
|
628 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_GET_VRING_BASE, &state); |
629 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
630 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
|
631 | d5970055 | Michael S. Tsirkin | fflush(stderr); |
632 | d5970055 | Michael S. Tsirkin | } |
633 | d5970055 | Michael S. Tsirkin | virtio_queue_set_last_avail_idx(vdev, idx, state.num); |
634 | d5970055 | Michael S. Tsirkin | assert (r >= 0);
|
635 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
636 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_ring_size(vdev, idx));
|
637 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
638 | d5970055 | Michael S. Tsirkin | 1, virtio_queue_get_used_size(vdev, idx));
|
639 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
640 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_avail_size(vdev, idx));
|
641 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
642 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_desc_size(vdev, idx));
|
643 | d5970055 | Michael S. Tsirkin | } |
644 | d5970055 | Michael S. Tsirkin | |
645 | 5430a28f | mst@redhat.com | int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force) |
646 | d5970055 | Michael S. Tsirkin | { |
647 | d5970055 | Michael S. Tsirkin | uint64_t features; |
648 | d5970055 | Michael S. Tsirkin | int r;
|
649 | d5970055 | Michael S. Tsirkin | if (devfd >= 0) { |
650 | d5970055 | Michael S. Tsirkin | hdev->control = devfd; |
651 | d5970055 | Michael S. Tsirkin | } else {
|
652 | d5970055 | Michael S. Tsirkin | hdev->control = open("/dev/vhost-net", O_RDWR);
|
653 | d5970055 | Michael S. Tsirkin | if (hdev->control < 0) { |
654 | d5970055 | Michael S. Tsirkin | return -errno;
|
655 | d5970055 | Michael S. Tsirkin | } |
656 | d5970055 | Michael S. Tsirkin | } |
657 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_OWNER, NULL);
|
658 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
659 | d5970055 | Michael S. Tsirkin | goto fail;
|
660 | d5970055 | Michael S. Tsirkin | } |
661 | d5970055 | Michael S. Tsirkin | |
662 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_GET_FEATURES, &features); |
663 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
664 | d5970055 | Michael S. Tsirkin | goto fail;
|
665 | d5970055 | Michael S. Tsirkin | } |
666 | d5970055 | Michael S. Tsirkin | hdev->features = features; |
667 | d5970055 | Michael S. Tsirkin | |
668 | d5970055 | Michael S. Tsirkin | hdev->client.set_memory = vhost_client_set_memory; |
669 | d5970055 | Michael S. Tsirkin | hdev->client.sync_dirty_bitmap = vhost_client_sync_dirty_bitmap; |
670 | d5970055 | Michael S. Tsirkin | hdev->client.migration_log = vhost_client_migration_log; |
671 | e5896b12 | Anthony PERARD | hdev->client.log_start = NULL;
|
672 | e5896b12 | Anthony PERARD | hdev->client.log_stop = NULL;
|
673 | d5970055 | Michael S. Tsirkin | hdev->mem = qemu_mallocz(offsetof(struct vhost_memory, regions));
|
674 | d5970055 | Michael S. Tsirkin | hdev->log = NULL;
|
675 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
676 | d5970055 | Michael S. Tsirkin | hdev->log_enabled = false;
|
677 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
678 | d5970055 | Michael S. Tsirkin | cpu_register_phys_memory_client(&hdev->client); |
679 | 5430a28f | mst@redhat.com | hdev->force = force; |
680 | d5970055 | Michael S. Tsirkin | return 0; |
681 | d5970055 | Michael S. Tsirkin | fail:
|
682 | d5970055 | Michael S. Tsirkin | r = -errno; |
683 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
684 | d5970055 | Michael S. Tsirkin | return r;
|
685 | d5970055 | Michael S. Tsirkin | } |
686 | d5970055 | Michael S. Tsirkin | |
687 | d5970055 | Michael S. Tsirkin | void vhost_dev_cleanup(struct vhost_dev *hdev) |
688 | d5970055 | Michael S. Tsirkin | { |
689 | d5970055 | Michael S. Tsirkin | cpu_unregister_phys_memory_client(&hdev->client); |
690 | d5970055 | Michael S. Tsirkin | qemu_free(hdev->mem); |
691 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
692 | d5970055 | Michael S. Tsirkin | } |
693 | d5970055 | Michael S. Tsirkin | |
694 | 5430a28f | mst@redhat.com | bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev) |
695 | 5430a28f | mst@redhat.com | { |
696 | 5430a28f | mst@redhat.com | return !vdev->binding->query_guest_notifiers ||
|
697 | 5430a28f | mst@redhat.com | vdev->binding->query_guest_notifiers(vdev->binding_opaque) || |
698 | 5430a28f | mst@redhat.com | hdev->force; |
699 | 5430a28f | mst@redhat.com | } |
700 | 5430a28f | mst@redhat.com | |
701 | d5970055 | Michael S. Tsirkin | int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) |
702 | d5970055 | Michael S. Tsirkin | { |
703 | d5970055 | Michael S. Tsirkin | int i, r;
|
704 | 54dd9321 | Michael S. Tsirkin | if (!vdev->binding->set_guest_notifiers) {
|
705 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "binding does not support guest notifiers\n");
|
706 | 54dd9321 | Michael S. Tsirkin | r = -ENOSYS; |
707 | 54dd9321 | Michael S. Tsirkin | goto fail;
|
708 | 54dd9321 | Michael S. Tsirkin | } |
709 | 54dd9321 | Michael S. Tsirkin | |
710 | 54dd9321 | Michael S. Tsirkin | r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, true);
|
711 | 54dd9321 | Michael S. Tsirkin | if (r < 0) { |
712 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "Error binding guest notifier: %d\n", -r);
|
713 | 54dd9321 | Michael S. Tsirkin | goto fail_notifiers;
|
714 | 54dd9321 | Michael S. Tsirkin | } |
715 | d5970055 | Michael S. Tsirkin | |
716 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(hdev, hdev->log_enabled); |
717 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
718 | 54dd9321 | Michael S. Tsirkin | goto fail_features;
|
719 | d5970055 | Michael S. Tsirkin | } |
720 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem); |
721 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
722 | d5970055 | Michael S. Tsirkin | r = -errno; |
723 | 54dd9321 | Michael S. Tsirkin | goto fail_mem;
|
724 | d5970055 | Michael S. Tsirkin | } |
725 | d154e0ba | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
726 | d154e0ba | Michael S. Tsirkin | r = vhost_virtqueue_init(hdev, |
727 | d154e0ba | Michael S. Tsirkin | vdev, |
728 | d154e0ba | Michael S. Tsirkin | hdev->vqs + i, |
729 | d154e0ba | Michael S. Tsirkin | i); |
730 | d154e0ba | Michael S. Tsirkin | if (r < 0) { |
731 | d154e0ba | Michael S. Tsirkin | goto fail_vq;
|
732 | d154e0ba | Michael S. Tsirkin | } |
733 | d154e0ba | Michael S. Tsirkin | } |
734 | d154e0ba | Michael S. Tsirkin | |
735 | d5970055 | Michael S. Tsirkin | if (hdev->log_enabled) {
|
736 | d5970055 | Michael S. Tsirkin | hdev->log_size = vhost_get_log_size(hdev); |
737 | d5970055 | Michael S. Tsirkin | hdev->log = hdev->log_size ? |
738 | d5970055 | Michael S. Tsirkin | qemu_mallocz(hdev->log_size * sizeof *hdev->log) : NULL; |
739 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_LOG_BASE, |
740 | d5970055 | Michael S. Tsirkin | (uint64_t)(unsigned long)hdev->log); |
741 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
742 | d5970055 | Michael S. Tsirkin | r = -errno; |
743 | 54dd9321 | Michael S. Tsirkin | goto fail_log;
|
744 | d5970055 | Michael S. Tsirkin | } |
745 | d5970055 | Michael S. Tsirkin | } |
746 | d154e0ba | Michael S. Tsirkin | |
747 | d5970055 | Michael S. Tsirkin | hdev->started = true;
|
748 | d5970055 | Michael S. Tsirkin | |
749 | d5970055 | Michael S. Tsirkin | return 0; |
750 | 54dd9321 | Michael S. Tsirkin | fail_log:
|
751 | d5970055 | Michael S. Tsirkin | fail_vq:
|
752 | d5970055 | Michael S. Tsirkin | while (--i >= 0) { |
753 | d5970055 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev, |
754 | d5970055 | Michael S. Tsirkin | vdev, |
755 | d5970055 | Michael S. Tsirkin | hdev->vqs + i, |
756 | d5970055 | Michael S. Tsirkin | i); |
757 | d5970055 | Michael S. Tsirkin | } |
758 | 54dd9321 | Michael S. Tsirkin | fail_mem:
|
759 | 54dd9321 | Michael S. Tsirkin | fail_features:
|
760 | 54dd9321 | Michael S. Tsirkin | vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
|
761 | 54dd9321 | Michael S. Tsirkin | fail_notifiers:
|
762 | d5970055 | Michael S. Tsirkin | fail:
|
763 | d5970055 | Michael S. Tsirkin | return r;
|
764 | d5970055 | Michael S. Tsirkin | } |
765 | d5970055 | Michael S. Tsirkin | |
766 | d5970055 | Michael S. Tsirkin | void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) |
767 | d5970055 | Michael S. Tsirkin | { |
768 | 54dd9321 | Michael S. Tsirkin | int i, r;
|
769 | 54dd9321 | Michael S. Tsirkin | |
770 | d5970055 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
771 | d5970055 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev, |
772 | d5970055 | Michael S. Tsirkin | vdev, |
773 | d5970055 | Michael S. Tsirkin | hdev->vqs + i, |
774 | d5970055 | Michael S. Tsirkin | i); |
775 | d5970055 | Michael S. Tsirkin | } |
776 | d5970055 | Michael S. Tsirkin | vhost_client_sync_dirty_bitmap(&hdev->client, 0,
|
777 | d5970055 | Michael S. Tsirkin | (target_phys_addr_t)~0x0ull);
|
778 | 54dd9321 | Michael S. Tsirkin | r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
|
779 | 54dd9321 | Michael S. Tsirkin | if (r < 0) { |
780 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
|
781 | 54dd9321 | Michael S. Tsirkin | fflush(stderr); |
782 | 54dd9321 | Michael S. Tsirkin | } |
783 | 54dd9321 | Michael S. Tsirkin | assert (r >= 0);
|
784 | 54dd9321 | Michael S. Tsirkin | |
785 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
786 | d5970055 | Michael S. Tsirkin | qemu_free(hdev->log); |
787 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
788 | d5970055 | Michael S. Tsirkin | } |