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