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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 | 6b620ca3 | Paolo Bonzini | *
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12 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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13 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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14 | d5970055 | Michael S. Tsirkin | */
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15 | d5970055 | Michael S. Tsirkin | |
16 | d5970055 | Michael S. Tsirkin | #include <sys/ioctl.h> |
17 | d5970055 | Michael S. Tsirkin | #include "vhost.h" |
18 | d5970055 | Michael S. Tsirkin | #include "hw/hw.h" |
19 | 1de7afc9 | Paolo Bonzini | #include "qemu/range.h" |
20 | 11078ae3 | Marcelo Tosatti | #include <linux/vhost.h> |
21 | 022c62cb | Paolo Bonzini | #include "exec/address-spaces.h" |
22 | d5970055 | Michael S. Tsirkin | |
23 | d5970055 | Michael S. Tsirkin | static void vhost_dev_sync_region(struct vhost_dev *dev, |
24 | 2817b260 | Avi Kivity | MemoryRegionSection *section, |
25 | d5970055 | Michael S. Tsirkin | uint64_t mfirst, uint64_t mlast, |
26 | d5970055 | Michael S. Tsirkin | uint64_t rfirst, uint64_t rlast) |
27 | d5970055 | Michael S. Tsirkin | { |
28 | d5970055 | Michael S. Tsirkin | uint64_t start = MAX(mfirst, rfirst); |
29 | d5970055 | Michael S. Tsirkin | uint64_t end = MIN(mlast, rlast); |
30 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *from = dev->log + start / VHOST_LOG_CHUNK; |
31 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *to = dev->log + end / VHOST_LOG_CHUNK + 1;
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32 | d5970055 | Michael S. Tsirkin | uint64_t addr = (start / VHOST_LOG_CHUNK) * VHOST_LOG_CHUNK; |
33 | d5970055 | Michael S. Tsirkin | |
34 | d5970055 | Michael S. Tsirkin | if (end < start) {
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35 | d5970055 | Michael S. Tsirkin | return;
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36 | d5970055 | Michael S. Tsirkin | } |
37 | e314672a | Alex Williamson | assert(end / VHOST_LOG_CHUNK < dev->log_size); |
38 | fbbaf9ae | Michael S. Tsirkin | assert(start / VHOST_LOG_CHUNK < dev->log_size); |
39 | e314672a | Alex Williamson | |
40 | d5970055 | Michael S. Tsirkin | for (;from < to; ++from) {
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41 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t log; |
42 | d5970055 | Michael S. Tsirkin | int bit;
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43 | d5970055 | Michael S. Tsirkin | /* We first check with non-atomic: much cheaper,
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44 | d5970055 | Michael S. Tsirkin | * and we expect non-dirty to be the common case. */
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45 | d5970055 | Michael S. Tsirkin | if (!*from) {
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46 | 0c600ce2 | Jason Wang | addr += VHOST_LOG_CHUNK; |
47 | d5970055 | Michael S. Tsirkin | continue;
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48 | d5970055 | Michael S. Tsirkin | } |
49 | d5970055 | Michael S. Tsirkin | /* Data must be read atomically. We don't really
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50 | d5970055 | Michael S. Tsirkin | * need the barrier semantics of __sync
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51 | d5970055 | Michael S. Tsirkin | * builtins, but it's easier to use them than
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52 | d5970055 | Michael S. Tsirkin | * roll our own. */
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53 | d5970055 | Michael S. Tsirkin | log = __sync_fetch_and_and(from, 0);
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54 | d5970055 | Michael S. Tsirkin | while ((bit = sizeof(log) > sizeof(int) ? |
55 | d5970055 | Michael S. Tsirkin | ffsll(log) : ffs(log))) { |
56 | 6b37a23d | Michael S. Tsirkin | hwaddr page_addr; |
57 | 6b37a23d | Michael S. Tsirkin | hwaddr section_offset; |
58 | 6b37a23d | Michael S. Tsirkin | hwaddr mr_offset; |
59 | d5970055 | Michael S. Tsirkin | bit -= 1;
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60 | 6b37a23d | Michael S. Tsirkin | page_addr = addr + bit * VHOST_LOG_PAGE; |
61 | 6b37a23d | Michael S. Tsirkin | section_offset = page_addr - section->offset_within_address_space; |
62 | 6b37a23d | Michael S. Tsirkin | mr_offset = section_offset + section->offset_within_region; |
63 | 6b37a23d | Michael S. Tsirkin | memory_region_set_dirty(section->mr, mr_offset, VHOST_LOG_PAGE); |
64 | d5970055 | Michael S. Tsirkin | log &= ~(0x1ull << bit);
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65 | d5970055 | Michael S. Tsirkin | } |
66 | d5970055 | Michael S. Tsirkin | addr += VHOST_LOG_CHUNK; |
67 | d5970055 | Michael S. Tsirkin | } |
68 | d5970055 | Michael S. Tsirkin | } |
69 | d5970055 | Michael S. Tsirkin | |
70 | 04097f7c | Avi Kivity | static int vhost_sync_dirty_bitmap(struct vhost_dev *dev, |
71 | 2817b260 | Avi Kivity | MemoryRegionSection *section, |
72 | 6b37a23d | Michael S. Tsirkin | hwaddr first, |
73 | 6b37a23d | Michael S. Tsirkin | hwaddr last) |
74 | d5970055 | Michael S. Tsirkin | { |
75 | d5970055 | Michael S. Tsirkin | int i;
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76 | 6b37a23d | Michael S. Tsirkin | hwaddr start_addr; |
77 | 6b37a23d | Michael S. Tsirkin | hwaddr end_addr; |
78 | 04097f7c | Avi Kivity | |
79 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled || !dev->started) {
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80 | d5970055 | Michael S. Tsirkin | return 0; |
81 | d5970055 | Michael S. Tsirkin | } |
82 | 6b37a23d | Michael S. Tsirkin | start_addr = section->offset_within_address_space; |
83 | 6b37a23d | Michael S. Tsirkin | end_addr = range_get_last(start_addr, section->size); |
84 | 6b37a23d | Michael S. Tsirkin | start_addr = MAX(first, start_addr); |
85 | 6b37a23d | Michael S. Tsirkin | end_addr = MIN(last, end_addr); |
86 | 6b37a23d | Michael S. Tsirkin | |
87 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
88 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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89 | 2817b260 | Avi Kivity | vhost_dev_sync_region(dev, section, start_addr, end_addr, |
90 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr, |
91 | d5970055 | Michael S. Tsirkin | range_get_last(reg->guest_phys_addr, |
92 | d5970055 | Michael S. Tsirkin | reg->memory_size)); |
93 | d5970055 | Michael S. Tsirkin | } |
94 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
95 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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96 | 2817b260 | Avi Kivity | vhost_dev_sync_region(dev, section, start_addr, end_addr, vq->used_phys, |
97 | d5970055 | Michael S. Tsirkin | range_get_last(vq->used_phys, vq->used_size)); |
98 | d5970055 | Michael S. Tsirkin | } |
99 | d5970055 | Michael S. Tsirkin | return 0; |
100 | d5970055 | Michael S. Tsirkin | } |
101 | d5970055 | Michael S. Tsirkin | |
102 | 04097f7c | Avi Kivity | static void vhost_log_sync(MemoryListener *listener, |
103 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
104 | 04097f7c | Avi Kivity | { |
105 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
106 | 04097f7c | Avi Kivity | memory_listener); |
107 | 6b37a23d | Michael S. Tsirkin | vhost_sync_dirty_bitmap(dev, section, 0x0, ~0x0ULL); |
108 | 6b37a23d | Michael S. Tsirkin | } |
109 | 04097f7c | Avi Kivity | |
110 | 6b37a23d | Michael S. Tsirkin | static void vhost_log_sync_range(struct vhost_dev *dev, |
111 | 6b37a23d | Michael S. Tsirkin | hwaddr first, hwaddr last) |
112 | 6b37a23d | Michael S. Tsirkin | { |
113 | 6b37a23d | Michael S. Tsirkin | int i;
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114 | 6b37a23d | Michael S. Tsirkin | /* FIXME: this is N^2 in number of sections */
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115 | 6b37a23d | Michael S. Tsirkin | for (i = 0; i < dev->n_mem_sections; ++i) { |
116 | 6b37a23d | Michael S. Tsirkin | MemoryRegionSection *section = &dev->mem_sections[i]; |
117 | 6b37a23d | Michael S. Tsirkin | vhost_sync_dirty_bitmap(dev, section, first, last); |
118 | 6b37a23d | Michael S. Tsirkin | } |
119 | 04097f7c | Avi Kivity | } |
120 | 04097f7c | Avi Kivity | |
121 | d5970055 | Michael S. Tsirkin | /* Assign/unassign. Keep an unsorted array of non-overlapping
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122 | d5970055 | Michael S. Tsirkin | * memory regions in dev->mem. */
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123 | d5970055 | Michael S. Tsirkin | static void vhost_dev_unassign_memory(struct vhost_dev *dev, |
124 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
125 | d5970055 | Michael S. Tsirkin | uint64_t size) |
126 | d5970055 | Michael S. Tsirkin | { |
127 | d5970055 | Michael S. Tsirkin | int from, to, n = dev->mem->nregions;
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128 | d5970055 | Michael S. Tsirkin | /* Track overlapping/split regions for sanity checking. */
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129 | d5970055 | Michael S. Tsirkin | int overlap_start = 0, overlap_end = 0, overlap_middle = 0, split = 0; |
130 | d5970055 | Michael S. Tsirkin | |
131 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < n; ++from, ++to) { |
132 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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133 | d5970055 | Michael S. Tsirkin | uint64_t reglast; |
134 | d5970055 | Michael S. Tsirkin | uint64_t memlast; |
135 | d5970055 | Michael S. Tsirkin | uint64_t change; |
136 | d5970055 | Michael S. Tsirkin | |
137 | d5970055 | Michael S. Tsirkin | /* clone old region */
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138 | d5970055 | Michael S. Tsirkin | if (to != from) {
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139 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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140 | d5970055 | Michael S. Tsirkin | } |
141 | d5970055 | Michael S. Tsirkin | |
142 | d5970055 | Michael S. Tsirkin | /* No overlap is simple */
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143 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(reg->guest_phys_addr, reg->memory_size,
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144 | d5970055 | Michael S. Tsirkin | start_addr, size)) { |
145 | d5970055 | Michael S. Tsirkin | continue;
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146 | d5970055 | Michael S. Tsirkin | } |
147 | d5970055 | Michael S. Tsirkin | |
148 | d5970055 | Michael S. Tsirkin | /* Split only happens if supplied region
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149 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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150 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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151 | d5970055 | Michael S. Tsirkin | assert(!split); |
152 | d5970055 | Michael S. Tsirkin | |
153 | d5970055 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
154 | d5970055 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
155 | d5970055 | Michael S. Tsirkin | |
156 | d5970055 | Michael S. Tsirkin | /* Remove whole region */
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157 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr && memlast >= reglast) {
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158 | d5970055 | Michael S. Tsirkin | --dev->mem->nregions; |
159 | d5970055 | Michael S. Tsirkin | --to; |
160 | d5970055 | Michael S. Tsirkin | ++overlap_middle; |
161 | d5970055 | Michael S. Tsirkin | continue;
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162 | d5970055 | Michael S. Tsirkin | } |
163 | d5970055 | Michael S. Tsirkin | |
164 | d5970055 | Michael S. Tsirkin | /* Shrink region */
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165 | d5970055 | Michael S. Tsirkin | if (memlast >= reglast) {
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166 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
167 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
168 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
169 | d5970055 | Michael S. Tsirkin | ++overlap_end; |
170 | d5970055 | Michael S. Tsirkin | continue;
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171 | d5970055 | Michael S. Tsirkin | } |
172 | d5970055 | Michael S. Tsirkin | |
173 | d5970055 | Michael S. Tsirkin | /* Shift region */
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174 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr) {
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175 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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176 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
177 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
178 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
179 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
180 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
181 | d5970055 | Michael S. Tsirkin | ++overlap_start; |
182 | d5970055 | Michael S. Tsirkin | continue;
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183 | d5970055 | Michael S. Tsirkin | } |
184 | d5970055 | Michael S. Tsirkin | |
185 | d5970055 | Michael S. Tsirkin | /* This only happens if supplied region
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186 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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187 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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188 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
189 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
190 | d5970055 | Michael S. Tsirkin | assert(!overlap_middle); |
191 | d5970055 | Michael S. Tsirkin | /* Split region: shrink first part, shift second part. */
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192 | d5970055 | Michael S. Tsirkin | memcpy(dev->mem->regions + n, reg, sizeof *reg);
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193 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
194 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
195 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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196 | d5970055 | Michael S. Tsirkin | reg = dev->mem->regions + n; |
197 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
198 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
199 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
200 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
201 | d5970055 | Michael S. Tsirkin | /* Never add more than 1 region */
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202 | d5970055 | Michael S. Tsirkin | assert(dev->mem->nregions == n); |
203 | d5970055 | Michael S. Tsirkin | ++dev->mem->nregions; |
204 | d5970055 | Michael S. Tsirkin | ++split; |
205 | d5970055 | Michael S. Tsirkin | } |
206 | d5970055 | Michael S. Tsirkin | } |
207 | d5970055 | Michael S. Tsirkin | |
208 | d5970055 | Michael S. Tsirkin | /* Called after unassign, so no regions overlap the given range. */
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209 | d5970055 | Michael S. Tsirkin | static void vhost_dev_assign_memory(struct vhost_dev *dev, |
210 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
211 | d5970055 | Michael S. Tsirkin | uint64_t size, |
212 | d5970055 | Michael S. Tsirkin | uint64_t uaddr) |
213 | d5970055 | Michael S. Tsirkin | { |
214 | d5970055 | Michael S. Tsirkin | int from, to;
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215 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *merged = NULL; |
216 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < dev->mem->nregions; ++from, ++to) { |
217 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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218 | d5970055 | Michael S. Tsirkin | uint64_t prlast, urlast; |
219 | d5970055 | Michael S. Tsirkin | uint64_t pmlast, umlast; |
220 | d5970055 | Michael S. Tsirkin | uint64_t s, e, u; |
221 | d5970055 | Michael S. Tsirkin | |
222 | d5970055 | Michael S. Tsirkin | /* clone old region */
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223 | d5970055 | Michael S. Tsirkin | if (to != from) {
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224 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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225 | d5970055 | Michael S. Tsirkin | } |
226 | d5970055 | Michael S. Tsirkin | prlast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
227 | d5970055 | Michael S. Tsirkin | pmlast = range_get_last(start_addr, size); |
228 | d5970055 | Michael S. Tsirkin | urlast = range_get_last(reg->userspace_addr, reg->memory_size); |
229 | d5970055 | Michael S. Tsirkin | umlast = range_get_last(uaddr, size); |
230 | d5970055 | Michael S. Tsirkin | |
231 | d5970055 | Michael S. Tsirkin | /* check for overlapping regions: should never happen. */
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232 | d5970055 | Michael S. Tsirkin | assert(prlast < start_addr || pmlast < reg->guest_phys_addr); |
233 | d5970055 | Michael S. Tsirkin | /* Not an adjacent or overlapping region - do not merge. */
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234 | d5970055 | Michael S. Tsirkin | if ((prlast + 1 != start_addr || urlast + 1 != uaddr) && |
235 | d5970055 | Michael S. Tsirkin | (pmlast + 1 != reg->guest_phys_addr ||
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236 | d5970055 | Michael S. Tsirkin | umlast + 1 != reg->userspace_addr)) {
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237 | d5970055 | Michael S. Tsirkin | continue;
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238 | d5970055 | Michael S. Tsirkin | } |
239 | d5970055 | Michael S. Tsirkin | |
240 | d5970055 | Michael S. Tsirkin | if (merged) {
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241 | d5970055 | Michael S. Tsirkin | --to; |
242 | d5970055 | Michael S. Tsirkin | assert(to >= 0);
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243 | d5970055 | Michael S. Tsirkin | } else {
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244 | d5970055 | Michael S. Tsirkin | merged = reg; |
245 | d5970055 | Michael S. Tsirkin | } |
246 | d5970055 | Michael S. Tsirkin | u = MIN(uaddr, reg->userspace_addr); |
247 | d5970055 | Michael S. Tsirkin | s = MIN(start_addr, reg->guest_phys_addr); |
248 | d5970055 | Michael S. Tsirkin | e = MAX(pmlast, prlast); |
249 | d5970055 | Michael S. Tsirkin | uaddr = merged->userspace_addr = u; |
250 | d5970055 | Michael S. Tsirkin | start_addr = merged->guest_phys_addr = s; |
251 | d5970055 | Michael S. Tsirkin | size = merged->memory_size = e - s + 1;
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252 | d5970055 | Michael S. Tsirkin | assert(merged->memory_size); |
253 | d5970055 | Michael S. Tsirkin | } |
254 | d5970055 | Michael S. Tsirkin | |
255 | d5970055 | Michael S. Tsirkin | if (!merged) {
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256 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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257 | d5970055 | Michael S. Tsirkin | memset(reg, 0, sizeof *reg); |
258 | d5970055 | Michael S. Tsirkin | reg->memory_size = size; |
259 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
260 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr = start_addr; |
261 | d5970055 | Michael S. Tsirkin | reg->userspace_addr = uaddr; |
262 | d5970055 | Michael S. Tsirkin | ++to; |
263 | d5970055 | Michael S. Tsirkin | } |
264 | d5970055 | Michael S. Tsirkin | assert(to <= dev->mem->nregions + 1);
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265 | d5970055 | Michael S. Tsirkin | dev->mem->nregions = to; |
266 | d5970055 | Michael S. Tsirkin | } |
267 | d5970055 | Michael S. Tsirkin | |
268 | d5970055 | Michael S. Tsirkin | static uint64_t vhost_get_log_size(struct vhost_dev *dev) |
269 | d5970055 | Michael S. Tsirkin | { |
270 | d5970055 | Michael S. Tsirkin | uint64_t log_size = 0;
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271 | d5970055 | Michael S. Tsirkin | int i;
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272 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
273 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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274 | d5970055 | Michael S. Tsirkin | uint64_t last = range_get_last(reg->guest_phys_addr, |
275 | d5970055 | Michael S. Tsirkin | reg->memory_size); |
276 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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277 | d5970055 | Michael S. Tsirkin | } |
278 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
279 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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280 | d5970055 | Michael S. Tsirkin | uint64_t last = vq->used_phys + vq->used_size - 1;
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281 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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282 | d5970055 | Michael S. Tsirkin | } |
283 | d5970055 | Michael S. Tsirkin | return log_size;
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284 | d5970055 | Michael S. Tsirkin | } |
285 | d5970055 | Michael S. Tsirkin | |
286 | d5970055 | Michael S. Tsirkin | static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size) |
287 | d5970055 | Michael S. Tsirkin | { |
288 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *log; |
289 | d5970055 | Michael S. Tsirkin | uint64_t log_base; |
290 | 6b37a23d | Michael S. Tsirkin | int r;
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291 | 6528499f | Markus Armbruster | |
292 | 6528499f | Markus Armbruster | log = g_malloc0(size * sizeof *log);
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293 | d5970055 | Michael S. Tsirkin | log_base = (uint64_t)(unsigned long)log; |
294 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base); |
295 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
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296 | 6b37a23d | Michael S. Tsirkin | /* Sync only the range covered by the old log */
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297 | 6b37a23d | Michael S. Tsirkin | if (dev->log_size) {
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298 | 6b37a23d | Michael S. Tsirkin | vhost_log_sync_range(dev, 0, dev->log_size * VHOST_LOG_CHUNK - 1); |
299 | 2817b260 | Avi Kivity | } |
300 | d5970055 | Michael S. Tsirkin | if (dev->log) {
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301 | 7267c094 | Anthony Liguori | g_free(dev->log); |
302 | d5970055 | Michael S. Tsirkin | } |
303 | d5970055 | Michael S. Tsirkin | dev->log = log; |
304 | d5970055 | Michael S. Tsirkin | dev->log_size = size; |
305 | d5970055 | Michael S. Tsirkin | } |
306 | d5970055 | Michael S. Tsirkin | |
307 | d5970055 | Michael S. Tsirkin | static int vhost_verify_ring_mappings(struct vhost_dev *dev, |
308 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
309 | d5970055 | Michael S. Tsirkin | uint64_t size) |
310 | d5970055 | Michael S. Tsirkin | { |
311 | d5970055 | Michael S. Tsirkin | int i;
|
312 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
313 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
|
314 | a8170e5e | Avi Kivity | hwaddr l; |
315 | d5970055 | Michael S. Tsirkin | void *p;
|
316 | d5970055 | Michael S. Tsirkin | |
317 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(start_addr, size, vq->ring_phys, vq->ring_size)) {
|
318 | d5970055 | Michael S. Tsirkin | continue;
|
319 | d5970055 | Michael S. Tsirkin | } |
320 | d5970055 | Michael S. Tsirkin | l = vq->ring_size; |
321 | d5970055 | Michael S. Tsirkin | p = cpu_physical_memory_map(vq->ring_phys, &l, 1);
|
322 | d5970055 | Michael S. Tsirkin | if (!p || l != vq->ring_size) {
|
323 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Unable to map ring buffer for ring %d\n", i);
|
324 | d5970055 | Michael S. Tsirkin | return -ENOMEM;
|
325 | d5970055 | Michael S. Tsirkin | } |
326 | d5970055 | Michael S. Tsirkin | if (p != vq->ring) {
|
327 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Ring buffer relocated for ring %d\n", i);
|
328 | d5970055 | Michael S. Tsirkin | return -EBUSY;
|
329 | d5970055 | Michael S. Tsirkin | } |
330 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(p, l, 0, 0); |
331 | d5970055 | Michael S. Tsirkin | } |
332 | d5970055 | Michael S. Tsirkin | return 0; |
333 | d5970055 | Michael S. Tsirkin | } |
334 | d5970055 | Michael S. Tsirkin | |
335 | 4e789564 | Michael S. Tsirkin | static struct vhost_memory_region *vhost_dev_find_reg(struct vhost_dev *dev, |
336 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
337 | 4e789564 | Michael S. Tsirkin | uint64_t size) |
338 | 4e789564 | Michael S. Tsirkin | { |
339 | 4e789564 | Michael S. Tsirkin | int i, n = dev->mem->nregions;
|
340 | 4e789564 | Michael S. Tsirkin | for (i = 0; i < n; ++i) { |
341 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
|
342 | 4e789564 | Michael S. Tsirkin | if (ranges_overlap(reg->guest_phys_addr, reg->memory_size,
|
343 | 4e789564 | Michael S. Tsirkin | start_addr, size)) { |
344 | 4e789564 | Michael S. Tsirkin | return reg;
|
345 | 4e789564 | Michael S. Tsirkin | } |
346 | 4e789564 | Michael S. Tsirkin | } |
347 | 4e789564 | Michael S. Tsirkin | return NULL; |
348 | 4e789564 | Michael S. Tsirkin | } |
349 | 4e789564 | Michael S. Tsirkin | |
350 | 4e789564 | Michael S. Tsirkin | static bool vhost_dev_cmp_memory(struct vhost_dev *dev, |
351 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
352 | 4e789564 | Michael S. Tsirkin | uint64_t size, |
353 | 4e789564 | Michael S. Tsirkin | uint64_t uaddr) |
354 | 4e789564 | Michael S. Tsirkin | { |
355 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = vhost_dev_find_reg(dev, start_addr, size);
|
356 | 4e789564 | Michael S. Tsirkin | uint64_t reglast; |
357 | 4e789564 | Michael S. Tsirkin | uint64_t memlast; |
358 | 4e789564 | Michael S. Tsirkin | |
359 | 4e789564 | Michael S. Tsirkin | if (!reg) {
|
360 | 4e789564 | Michael S. Tsirkin | return true; |
361 | 4e789564 | Michael S. Tsirkin | } |
362 | 4e789564 | Michael S. Tsirkin | |
363 | 4e789564 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
364 | 4e789564 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
365 | 4e789564 | Michael S. Tsirkin | |
366 | 4e789564 | Michael S. Tsirkin | /* Need to extend region? */
|
367 | 4e789564 | Michael S. Tsirkin | if (start_addr < reg->guest_phys_addr || memlast > reglast) {
|
368 | 4e789564 | Michael S. Tsirkin | return true; |
369 | 4e789564 | Michael S. Tsirkin | } |
370 | 4e789564 | Michael S. Tsirkin | /* userspace_addr changed? */
|
371 | 4e789564 | Michael S. Tsirkin | return uaddr != reg->userspace_addr + start_addr - reg->guest_phys_addr;
|
372 | 4e789564 | Michael S. Tsirkin | } |
373 | 4e789564 | Michael S. Tsirkin | |
374 | 04097f7c | Avi Kivity | static void vhost_set_memory(MemoryListener *listener, |
375 | 04097f7c | Avi Kivity | MemoryRegionSection *section, |
376 | 04097f7c | Avi Kivity | bool add)
|
377 | d5970055 | Michael S. Tsirkin | { |
378 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
379 | 04097f7c | Avi Kivity | memory_listener); |
380 | a8170e5e | Avi Kivity | hwaddr start_addr = section->offset_within_address_space; |
381 | 04097f7c | Avi Kivity | ram_addr_t size = section->size; |
382 | 04097f7c | Avi Kivity | bool log_dirty = memory_region_is_logging(section->mr);
|
383 | d5970055 | Michael S. Tsirkin | int s = offsetof(struct vhost_memory, regions) + |
384 | d5970055 | Michael S. Tsirkin | (dev->mem->nregions + 1) * sizeof dev->mem->regions[0]; |
385 | d5970055 | Michael S. Tsirkin | uint64_t log_size; |
386 | d5970055 | Michael S. Tsirkin | int r;
|
387 | 04097f7c | Avi Kivity | void *ram;
|
388 | 04097f7c | Avi Kivity | |
389 | 7267c094 | Anthony Liguori | dev->mem = g_realloc(dev->mem, s); |
390 | d5970055 | Michael S. Tsirkin | |
391 | f5a4e64f | Michael S. Tsirkin | if (log_dirty) {
|
392 | 04097f7c | Avi Kivity | add = false;
|
393 | f5a4e64f | Michael S. Tsirkin | } |
394 | f5a4e64f | Michael S. Tsirkin | |
395 | d5970055 | Michael S. Tsirkin | assert(size); |
396 | d5970055 | Michael S. Tsirkin | |
397 | 4e789564 | Michael S. Tsirkin | /* Optimize no-change case. At least cirrus_vga does this a lot at this time. */
|
398 | d743c382 | Avi Kivity | ram = memory_region_get_ram_ptr(section->mr) + section->offset_within_region; |
399 | 04097f7c | Avi Kivity | if (add) {
|
400 | 04097f7c | Avi Kivity | if (!vhost_dev_cmp_memory(dev, start_addr, size, (uintptr_t)ram)) {
|
401 | 4e789564 | Michael S. Tsirkin | /* Region exists with same address. Nothing to do. */
|
402 | 4e789564 | Michael S. Tsirkin | return;
|
403 | 4e789564 | Michael S. Tsirkin | } |
404 | 4e789564 | Michael S. Tsirkin | } else {
|
405 | 4e789564 | Michael S. Tsirkin | if (!vhost_dev_find_reg(dev, start_addr, size)) {
|
406 | 4e789564 | Michael S. Tsirkin | /* Removing region that we don't access. Nothing to do. */
|
407 | 4e789564 | Michael S. Tsirkin | return;
|
408 | 4e789564 | Michael S. Tsirkin | } |
409 | 4e789564 | Michael S. Tsirkin | } |
410 | 4e789564 | Michael S. Tsirkin | |
411 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
412 | 04097f7c | Avi Kivity | if (add) {
|
413 | d5970055 | Michael S. Tsirkin | /* Add given mapping, merging adjacent regions if any */
|
414 | 04097f7c | Avi Kivity | vhost_dev_assign_memory(dev, start_addr, size, (uintptr_t)ram); |
415 | d5970055 | Michael S. Tsirkin | } else {
|
416 | d5970055 | Michael S. Tsirkin | /* Remove old mapping for this memory, if any. */
|
417 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
418 | d5970055 | Michael S. Tsirkin | } |
419 | d5970055 | Michael S. Tsirkin | |
420 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
421 | d5970055 | Michael S. Tsirkin | return;
|
422 | d5970055 | Michael S. Tsirkin | } |
423 | d5970055 | Michael S. Tsirkin | |
424 | d5970055 | Michael S. Tsirkin | if (dev->started) {
|
425 | d5970055 | Michael S. Tsirkin | r = vhost_verify_ring_mappings(dev, start_addr, size); |
426 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
427 | d5970055 | Michael S. Tsirkin | } |
428 | d5970055 | Michael S. Tsirkin | |
429 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled) {
|
430 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
431 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
432 | d5970055 | Michael S. Tsirkin | return;
|
433 | d5970055 | Michael S. Tsirkin | } |
434 | d5970055 | Michael S. Tsirkin | log_size = vhost_get_log_size(dev); |
435 | d5970055 | Michael S. Tsirkin | /* We allocate an extra 4K bytes to log,
|
436 | d5970055 | Michael S. Tsirkin | * to reduce the * number of reallocations. */
|
437 | d5970055 | Michael S. Tsirkin | #define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log) |
438 | d5970055 | Michael S. Tsirkin | /* To log more, must increase log size before table update. */
|
439 | d5970055 | Michael S. Tsirkin | if (dev->log_size < log_size) {
|
440 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER); |
441 | d5970055 | Michael S. Tsirkin | } |
442 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
443 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
444 | d5970055 | Michael S. Tsirkin | /* To log less, can only decrease log size after table update. */
|
445 | d5970055 | Michael S. Tsirkin | if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
|
446 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size); |
447 | d5970055 | Michael S. Tsirkin | } |
448 | d5970055 | Michael S. Tsirkin | } |
449 | d5970055 | Michael S. Tsirkin | |
450 | c49450b9 | Avi Kivity | static bool vhost_section(MemoryRegionSection *section) |
451 | c49450b9 | Avi Kivity | { |
452 | 0fada674 | Avi Kivity | return memory_region_is_ram(section->mr);
|
453 | c49450b9 | Avi Kivity | } |
454 | c49450b9 | Avi Kivity | |
455 | 50c1e149 | Avi Kivity | static void vhost_begin(MemoryListener *listener) |
456 | 50c1e149 | Avi Kivity | { |
457 | 50c1e149 | Avi Kivity | } |
458 | 50c1e149 | Avi Kivity | |
459 | 50c1e149 | Avi Kivity | static void vhost_commit(MemoryListener *listener) |
460 | 50c1e149 | Avi Kivity | { |
461 | 50c1e149 | Avi Kivity | } |
462 | 50c1e149 | Avi Kivity | |
463 | 04097f7c | Avi Kivity | static void vhost_region_add(MemoryListener *listener, |
464 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
465 | 04097f7c | Avi Kivity | { |
466 | 2817b260 | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
467 | 2817b260 | Avi Kivity | memory_listener); |
468 | 2817b260 | Avi Kivity | |
469 | c49450b9 | Avi Kivity | if (!vhost_section(section)) {
|
470 | c49450b9 | Avi Kivity | return;
|
471 | c49450b9 | Avi Kivity | } |
472 | c49450b9 | Avi Kivity | |
473 | 2817b260 | Avi Kivity | ++dev->n_mem_sections; |
474 | 2817b260 | Avi Kivity | dev->mem_sections = g_renew(MemoryRegionSection, dev->mem_sections, |
475 | 2817b260 | Avi Kivity | dev->n_mem_sections); |
476 | 2817b260 | Avi Kivity | dev->mem_sections[dev->n_mem_sections - 1] = *section;
|
477 | 04097f7c | Avi Kivity | vhost_set_memory(listener, section, true);
|
478 | 04097f7c | Avi Kivity | } |
479 | 04097f7c | Avi Kivity | |
480 | 04097f7c | Avi Kivity | static void vhost_region_del(MemoryListener *listener, |
481 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
482 | 04097f7c | Avi Kivity | { |
483 | 2817b260 | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
484 | 2817b260 | Avi Kivity | memory_listener); |
485 | 2817b260 | Avi Kivity | int i;
|
486 | 2817b260 | Avi Kivity | |
487 | c49450b9 | Avi Kivity | if (!vhost_section(section)) {
|
488 | c49450b9 | Avi Kivity | return;
|
489 | c49450b9 | Avi Kivity | } |
490 | c49450b9 | Avi Kivity | |
491 | 04097f7c | Avi Kivity | vhost_set_memory(listener, section, false);
|
492 | 2817b260 | Avi Kivity | for (i = 0; i < dev->n_mem_sections; ++i) { |
493 | 2817b260 | Avi Kivity | if (dev->mem_sections[i].offset_within_address_space
|
494 | 2817b260 | Avi Kivity | == section->offset_within_address_space) { |
495 | 2817b260 | Avi Kivity | --dev->n_mem_sections; |
496 | 2817b260 | Avi Kivity | memmove(&dev->mem_sections[i], &dev->mem_sections[i+1],
|
497 | 637f7a6a | Avi Kivity | (dev->n_mem_sections - i) * sizeof(*dev->mem_sections));
|
498 | 2817b260 | Avi Kivity | break;
|
499 | 2817b260 | Avi Kivity | } |
500 | 2817b260 | Avi Kivity | } |
501 | 04097f7c | Avi Kivity | } |
502 | 04097f7c | Avi Kivity | |
503 | 50c1e149 | Avi Kivity | static void vhost_region_nop(MemoryListener *listener, |
504 | 50c1e149 | Avi Kivity | MemoryRegionSection *section) |
505 | 50c1e149 | Avi Kivity | { |
506 | 50c1e149 | Avi Kivity | } |
507 | 50c1e149 | Avi Kivity | |
508 | d5970055 | Michael S. Tsirkin | static int vhost_virtqueue_set_addr(struct vhost_dev *dev, |
509 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
510 | d5970055 | Michael S. Tsirkin | unsigned idx, bool enable_log) |
511 | d5970055 | Michael S. Tsirkin | { |
512 | d5970055 | Michael S. Tsirkin | struct vhost_vring_addr addr = {
|
513 | d5970055 | Michael S. Tsirkin | .index = idx, |
514 | 2b3af999 | Stefan Weil | .desc_user_addr = (uint64_t)(unsigned long)vq->desc, |
515 | 2b3af999 | Stefan Weil | .avail_user_addr = (uint64_t)(unsigned long)vq->avail, |
516 | 2b3af999 | Stefan Weil | .used_user_addr = (uint64_t)(unsigned long)vq->used, |
517 | d5970055 | Michael S. Tsirkin | .log_guest_addr = vq->used_phys, |
518 | d5970055 | Michael S. Tsirkin | .flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0, |
519 | d5970055 | Michael S. Tsirkin | }; |
520 | d5970055 | Michael S. Tsirkin | int r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
|
521 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
522 | d5970055 | Michael S. Tsirkin | return -errno;
|
523 | d5970055 | Michael S. Tsirkin | } |
524 | d5970055 | Michael S. Tsirkin | return 0; |
525 | d5970055 | Michael S. Tsirkin | } |
526 | d5970055 | Michael S. Tsirkin | |
527 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log) |
528 | d5970055 | Michael S. Tsirkin | { |
529 | d5970055 | Michael S. Tsirkin | uint64_t features = dev->acked_features; |
530 | d5970055 | Michael S. Tsirkin | int r;
|
531 | d5970055 | Michael S. Tsirkin | if (enable_log) {
|
532 | d5970055 | Michael S. Tsirkin | features |= 0x1 << VHOST_F_LOG_ALL;
|
533 | d5970055 | Michael S. Tsirkin | } |
534 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_FEATURES, &features); |
535 | d5970055 | Michael S. Tsirkin | return r < 0 ? -errno : 0; |
536 | d5970055 | Michael S. Tsirkin | } |
537 | d5970055 | Michael S. Tsirkin | |
538 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) |
539 | d5970055 | Michael S. Tsirkin | { |
540 | d5970055 | Michael S. Tsirkin | int r, t, i;
|
541 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(dev, enable_log); |
542 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
543 | d5970055 | Michael S. Tsirkin | goto err_features;
|
544 | d5970055 | Michael S. Tsirkin | } |
545 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
546 | d5970055 | Michael S. Tsirkin | r = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
547 | d5970055 | Michael S. Tsirkin | enable_log); |
548 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
549 | d5970055 | Michael S. Tsirkin | goto err_vq;
|
550 | d5970055 | Michael S. Tsirkin | } |
551 | d5970055 | Michael S. Tsirkin | } |
552 | d5970055 | Michael S. Tsirkin | return 0; |
553 | d5970055 | Michael S. Tsirkin | err_vq:
|
554 | d5970055 | Michael S. Tsirkin | for (; i >= 0; --i) { |
555 | d5970055 | Michael S. Tsirkin | t = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
556 | d5970055 | Michael S. Tsirkin | dev->log_enabled); |
557 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
558 | d5970055 | Michael S. Tsirkin | } |
559 | d5970055 | Michael S. Tsirkin | t = vhost_dev_set_features(dev, dev->log_enabled); |
560 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
561 | d5970055 | Michael S. Tsirkin | err_features:
|
562 | d5970055 | Michael S. Tsirkin | return r;
|
563 | d5970055 | Michael S. Tsirkin | } |
564 | d5970055 | Michael S. Tsirkin | |
565 | 04097f7c | Avi Kivity | static int vhost_migration_log(MemoryListener *listener, int enable) |
566 | d5970055 | Michael S. Tsirkin | { |
567 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
568 | 04097f7c | Avi Kivity | memory_listener); |
569 | d5970055 | Michael S. Tsirkin | int r;
|
570 | d5970055 | Michael S. Tsirkin | if (!!enable == dev->log_enabled) {
|
571 | d5970055 | Michael S. Tsirkin | return 0; |
572 | d5970055 | Michael S. Tsirkin | } |
573 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
574 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
575 | d5970055 | Michael S. Tsirkin | return 0; |
576 | d5970055 | Michael S. Tsirkin | } |
577 | d5970055 | Michael S. Tsirkin | if (!enable) {
|
578 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, false);
|
579 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
580 | d5970055 | Michael S. Tsirkin | return r;
|
581 | d5970055 | Michael S. Tsirkin | } |
582 | d5970055 | Michael S. Tsirkin | if (dev->log) {
|
583 | 7267c094 | Anthony Liguori | g_free(dev->log); |
584 | d5970055 | Michael S. Tsirkin | } |
585 | d5970055 | Michael S. Tsirkin | dev->log = NULL;
|
586 | d5970055 | Michael S. Tsirkin | dev->log_size = 0;
|
587 | d5970055 | Michael S. Tsirkin | } else {
|
588 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, vhost_get_log_size(dev)); |
589 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, true);
|
590 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
591 | d5970055 | Michael S. Tsirkin | return r;
|
592 | d5970055 | Michael S. Tsirkin | } |
593 | d5970055 | Michael S. Tsirkin | } |
594 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
595 | d5970055 | Michael S. Tsirkin | return 0; |
596 | d5970055 | Michael S. Tsirkin | } |
597 | d5970055 | Michael S. Tsirkin | |
598 | 04097f7c | Avi Kivity | static void vhost_log_global_start(MemoryListener *listener) |
599 | 04097f7c | Avi Kivity | { |
600 | 04097f7c | Avi Kivity | int r;
|
601 | 04097f7c | Avi Kivity | |
602 | 04097f7c | Avi Kivity | r = vhost_migration_log(listener, true);
|
603 | 04097f7c | Avi Kivity | if (r < 0) { |
604 | 04097f7c | Avi Kivity | abort(); |
605 | 04097f7c | Avi Kivity | } |
606 | 04097f7c | Avi Kivity | } |
607 | 04097f7c | Avi Kivity | |
608 | 04097f7c | Avi Kivity | static void vhost_log_global_stop(MemoryListener *listener) |
609 | 04097f7c | Avi Kivity | { |
610 | 04097f7c | Avi Kivity | int r;
|
611 | 04097f7c | Avi Kivity | |
612 | 04097f7c | Avi Kivity | r = vhost_migration_log(listener, false);
|
613 | 04097f7c | Avi Kivity | if (r < 0) { |
614 | 04097f7c | Avi Kivity | abort(); |
615 | 04097f7c | Avi Kivity | } |
616 | 04097f7c | Avi Kivity | } |
617 | 04097f7c | Avi Kivity | |
618 | 04097f7c | Avi Kivity | static void vhost_log_start(MemoryListener *listener, |
619 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
620 | 04097f7c | Avi Kivity | { |
621 | 04097f7c | Avi Kivity | /* FIXME: implement */
|
622 | 04097f7c | Avi Kivity | } |
623 | 04097f7c | Avi Kivity | |
624 | 04097f7c | Avi Kivity | static void vhost_log_stop(MemoryListener *listener, |
625 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
626 | 04097f7c | Avi Kivity | { |
627 | 04097f7c | Avi Kivity | /* FIXME: implement */
|
628 | 04097f7c | Avi Kivity | } |
629 | 04097f7c | Avi Kivity | |
630 | f56a1247 | Michael S. Tsirkin | static int vhost_virtqueue_start(struct vhost_dev *dev, |
631 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
632 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
633 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
634 | d5970055 | Michael S. Tsirkin | { |
635 | a8170e5e | Avi Kivity | hwaddr s, l, a; |
636 | d5970055 | Michael S. Tsirkin | int r;
|
637 | a9f98bb5 | Jason Wang | int vhost_vq_index = idx - dev->vq_index;
|
638 | d5970055 | Michael S. Tsirkin | struct vhost_vring_file file = {
|
639 | a9f98bb5 | Jason Wang | .index = vhost_vq_index |
640 | d5970055 | Michael S. Tsirkin | }; |
641 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
642 | a9f98bb5 | Jason Wang | .index = vhost_vq_index |
643 | d5970055 | Michael S. Tsirkin | }; |
644 | d5970055 | Michael S. Tsirkin | struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
|
645 | d5970055 | Michael S. Tsirkin | |
646 | a9f98bb5 | Jason Wang | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); |
647 | a9f98bb5 | Jason Wang | |
648 | d5970055 | Michael S. Tsirkin | vq->num = state.num = virtio_queue_get_num(vdev, idx); |
649 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state); |
650 | d5970055 | Michael S. Tsirkin | if (r) {
|
651 | d5970055 | Michael S. Tsirkin | return -errno;
|
652 | d5970055 | Michael S. Tsirkin | } |
653 | d5970055 | Michael S. Tsirkin | |
654 | d5970055 | Michael S. Tsirkin | state.num = virtio_queue_get_last_avail_idx(vdev, idx); |
655 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state); |
656 | d5970055 | Michael S. Tsirkin | if (r) {
|
657 | d5970055 | Michael S. Tsirkin | return -errno;
|
658 | d5970055 | Michael S. Tsirkin | } |
659 | d5970055 | Michael S. Tsirkin | |
660 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_desc_size(vdev, idx); |
661 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_desc_addr(vdev, idx); |
662 | d5970055 | Michael S. Tsirkin | vq->desc = cpu_physical_memory_map(a, &l, 0);
|
663 | d5970055 | Michael S. Tsirkin | if (!vq->desc || l != s) {
|
664 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
665 | d5970055 | Michael S. Tsirkin | goto fail_alloc_desc;
|
666 | d5970055 | Michael S. Tsirkin | } |
667 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_avail_size(vdev, idx); |
668 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_avail_addr(vdev, idx); |
669 | d5970055 | Michael S. Tsirkin | vq->avail = cpu_physical_memory_map(a, &l, 0);
|
670 | d5970055 | Michael S. Tsirkin | if (!vq->avail || l != s) {
|
671 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
672 | d5970055 | Michael S. Tsirkin | goto fail_alloc_avail;
|
673 | d5970055 | Michael S. Tsirkin | } |
674 | d5970055 | Michael S. Tsirkin | vq->used_size = s = l = virtio_queue_get_used_size(vdev, idx); |
675 | d5970055 | Michael S. Tsirkin | vq->used_phys = a = virtio_queue_get_used_addr(vdev, idx); |
676 | d5970055 | Michael S. Tsirkin | vq->used = cpu_physical_memory_map(a, &l, 1);
|
677 | d5970055 | Michael S. Tsirkin | if (!vq->used || l != s) {
|
678 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
679 | d5970055 | Michael S. Tsirkin | goto fail_alloc_used;
|
680 | d5970055 | Michael S. Tsirkin | } |
681 | d5970055 | Michael S. Tsirkin | |
682 | d5970055 | Michael S. Tsirkin | vq->ring_size = s = l = virtio_queue_get_ring_size(vdev, idx); |
683 | d5970055 | Michael S. Tsirkin | vq->ring_phys = a = virtio_queue_get_ring_addr(vdev, idx); |
684 | d5970055 | Michael S. Tsirkin | vq->ring = cpu_physical_memory_map(a, &l, 1);
|
685 | d5970055 | Michael S. Tsirkin | if (!vq->ring || l != s) {
|
686 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
687 | d5970055 | Michael S. Tsirkin | goto fail_alloc_ring;
|
688 | d5970055 | Michael S. Tsirkin | } |
689 | d5970055 | Michael S. Tsirkin | |
690 | a9f98bb5 | Jason Wang | r = vhost_virtqueue_set_addr(dev, vq, vhost_vq_index, dev->log_enabled); |
691 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
692 | d5970055 | Michael S. Tsirkin | r = -errno; |
693 | d5970055 | Michael S. Tsirkin | goto fail_alloc;
|
694 | d5970055 | Michael S. Tsirkin | } |
695 | a9f98bb5 | Jason Wang | |
696 | d5970055 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq)); |
697 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file); |
698 | d5970055 | Michael S. Tsirkin | if (r) {
|
699 | c8852121 | Michael S. Tsirkin | r = -errno; |
700 | d5970055 | Michael S. Tsirkin | goto fail_kick;
|
701 | d5970055 | Michael S. Tsirkin | } |
702 | d5970055 | Michael S. Tsirkin | |
703 | f56a1247 | Michael S. Tsirkin | /* Clear and discard previous events if any. */
|
704 | f56a1247 | Michael S. Tsirkin | event_notifier_test_and_clear(&vq->masked_notifier); |
705 | d5970055 | Michael S. Tsirkin | |
706 | d5970055 | Michael S. Tsirkin | return 0; |
707 | d5970055 | Michael S. Tsirkin | |
708 | d5970055 | Michael S. Tsirkin | fail_kick:
|
709 | d5970055 | Michael S. Tsirkin | fail_alloc:
|
710 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
711 | d5970055 | Michael S. Tsirkin | 0, 0); |
712 | d5970055 | Michael S. Tsirkin | fail_alloc_ring:
|
713 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
714 | d5970055 | Michael S. Tsirkin | 0, 0); |
715 | d5970055 | Michael S. Tsirkin | fail_alloc_used:
|
716 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
717 | d5970055 | Michael S. Tsirkin | 0, 0); |
718 | d5970055 | Michael S. Tsirkin | fail_alloc_avail:
|
719 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
720 | d5970055 | Michael S. Tsirkin | 0, 0); |
721 | d5970055 | Michael S. Tsirkin | fail_alloc_desc:
|
722 | d5970055 | Michael S. Tsirkin | return r;
|
723 | d5970055 | Michael S. Tsirkin | } |
724 | d5970055 | Michael S. Tsirkin | |
725 | f56a1247 | Michael S. Tsirkin | static void vhost_virtqueue_stop(struct vhost_dev *dev, |
726 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
727 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
728 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
729 | d5970055 | Michael S. Tsirkin | { |
730 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
731 | a9f98bb5 | Jason Wang | .index = idx - dev->vq_index |
732 | d5970055 | Michael S. Tsirkin | }; |
733 | d5970055 | Michael S. Tsirkin | int r;
|
734 | a9f98bb5 | Jason Wang | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); |
735 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_GET_VRING_BASE, &state); |
736 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
737 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
|
738 | d5970055 | Michael S. Tsirkin | fflush(stderr); |
739 | d5970055 | Michael S. Tsirkin | } |
740 | d5970055 | Michael S. Tsirkin | virtio_queue_set_last_avail_idx(vdev, idx, state.num); |
741 | d5970055 | Michael S. Tsirkin | assert (r >= 0);
|
742 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
743 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_ring_size(vdev, idx));
|
744 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
745 | d5970055 | Michael S. Tsirkin | 1, virtio_queue_get_used_size(vdev, idx));
|
746 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
747 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_avail_size(vdev, idx));
|
748 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
749 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_desc_size(vdev, idx));
|
750 | d5970055 | Michael S. Tsirkin | } |
751 | d5970055 | Michael S. Tsirkin | |
752 | 80a1ea37 | Avi Kivity | static void vhost_eventfd_add(MemoryListener *listener, |
753 | 80a1ea37 | Avi Kivity | MemoryRegionSection *section, |
754 | 753d5e14 | Paolo Bonzini | bool match_data, uint64_t data, EventNotifier *e)
|
755 | 80a1ea37 | Avi Kivity | { |
756 | 80a1ea37 | Avi Kivity | } |
757 | 80a1ea37 | Avi Kivity | |
758 | 80a1ea37 | Avi Kivity | static void vhost_eventfd_del(MemoryListener *listener, |
759 | 80a1ea37 | Avi Kivity | MemoryRegionSection *section, |
760 | 753d5e14 | Paolo Bonzini | bool match_data, uint64_t data, EventNotifier *e)
|
761 | 80a1ea37 | Avi Kivity | { |
762 | 80a1ea37 | Avi Kivity | } |
763 | 80a1ea37 | Avi Kivity | |
764 | f56a1247 | Michael S. Tsirkin | static int vhost_virtqueue_init(struct vhost_dev *dev, |
765 | f56a1247 | Michael S. Tsirkin | struct vhost_virtqueue *vq, int n) |
766 | f56a1247 | Michael S. Tsirkin | { |
767 | f56a1247 | Michael S. Tsirkin | struct vhost_vring_file file = {
|
768 | f56a1247 | Michael S. Tsirkin | .index = n, |
769 | f56a1247 | Michael S. Tsirkin | }; |
770 | f56a1247 | Michael S. Tsirkin | int r = event_notifier_init(&vq->masked_notifier, 0); |
771 | f56a1247 | Michael S. Tsirkin | if (r < 0) { |
772 | f56a1247 | Michael S. Tsirkin | return r;
|
773 | f56a1247 | Michael S. Tsirkin | } |
774 | f56a1247 | Michael S. Tsirkin | |
775 | f56a1247 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(&vq->masked_notifier); |
776 | f56a1247 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file); |
777 | f56a1247 | Michael S. Tsirkin | if (r) {
|
778 | f56a1247 | Michael S. Tsirkin | r = -errno; |
779 | f56a1247 | Michael S. Tsirkin | goto fail_call;
|
780 | f56a1247 | Michael S. Tsirkin | } |
781 | f56a1247 | Michael S. Tsirkin | return 0; |
782 | f56a1247 | Michael S. Tsirkin | fail_call:
|
783 | f56a1247 | Michael S. Tsirkin | event_notifier_cleanup(&vq->masked_notifier); |
784 | f56a1247 | Michael S. Tsirkin | return r;
|
785 | f56a1247 | Michael S. Tsirkin | } |
786 | f56a1247 | Michael S. Tsirkin | |
787 | f56a1247 | Michael S. Tsirkin | static void vhost_virtqueue_cleanup(struct vhost_virtqueue *vq) |
788 | f56a1247 | Michael S. Tsirkin | { |
789 | f56a1247 | Michael S. Tsirkin | event_notifier_cleanup(&vq->masked_notifier); |
790 | f56a1247 | Michael S. Tsirkin | } |
791 | f56a1247 | Michael S. Tsirkin | |
792 | 1241ed94 | Stefan Hajnoczi | int vhost_dev_init(struct vhost_dev *hdev, int devfd, const char *devpath, |
793 | 1241ed94 | Stefan Hajnoczi | bool force)
|
794 | d5970055 | Michael S. Tsirkin | { |
795 | d5970055 | Michael S. Tsirkin | uint64_t features; |
796 | f56a1247 | Michael S. Tsirkin | int i, r;
|
797 | d5970055 | Michael S. Tsirkin | if (devfd >= 0) { |
798 | d5970055 | Michael S. Tsirkin | hdev->control = devfd; |
799 | d5970055 | Michael S. Tsirkin | } else {
|
800 | 1241ed94 | Stefan Hajnoczi | hdev->control = open(devpath, O_RDWR); |
801 | d5970055 | Michael S. Tsirkin | if (hdev->control < 0) { |
802 | d5970055 | Michael S. Tsirkin | return -errno;
|
803 | d5970055 | Michael S. Tsirkin | } |
804 | d5970055 | Michael S. Tsirkin | } |
805 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_OWNER, NULL);
|
806 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
807 | d5970055 | Michael S. Tsirkin | goto fail;
|
808 | d5970055 | Michael S. Tsirkin | } |
809 | d5970055 | Michael S. Tsirkin | |
810 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_GET_FEATURES, &features); |
811 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
812 | d5970055 | Michael S. Tsirkin | goto fail;
|
813 | d5970055 | Michael S. Tsirkin | } |
814 | f56a1247 | Michael S. Tsirkin | |
815 | f56a1247 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
816 | f56a1247 | Michael S. Tsirkin | r = vhost_virtqueue_init(hdev, hdev->vqs + i, i); |
817 | f56a1247 | Michael S. Tsirkin | if (r < 0) { |
818 | f56a1247 | Michael S. Tsirkin | goto fail_vq;
|
819 | f56a1247 | Michael S. Tsirkin | } |
820 | f56a1247 | Michael S. Tsirkin | } |
821 | d5970055 | Michael S. Tsirkin | hdev->features = features; |
822 | d5970055 | Michael S. Tsirkin | |
823 | 04097f7c | Avi Kivity | hdev->memory_listener = (MemoryListener) { |
824 | 50c1e149 | Avi Kivity | .begin = vhost_begin, |
825 | 50c1e149 | Avi Kivity | .commit = vhost_commit, |
826 | 04097f7c | Avi Kivity | .region_add = vhost_region_add, |
827 | 04097f7c | Avi Kivity | .region_del = vhost_region_del, |
828 | 50c1e149 | Avi Kivity | .region_nop = vhost_region_nop, |
829 | 04097f7c | Avi Kivity | .log_start = vhost_log_start, |
830 | 04097f7c | Avi Kivity | .log_stop = vhost_log_stop, |
831 | 04097f7c | Avi Kivity | .log_sync = vhost_log_sync, |
832 | 04097f7c | Avi Kivity | .log_global_start = vhost_log_global_start, |
833 | 04097f7c | Avi Kivity | .log_global_stop = vhost_log_global_stop, |
834 | 80a1ea37 | Avi Kivity | .eventfd_add = vhost_eventfd_add, |
835 | 80a1ea37 | Avi Kivity | .eventfd_del = vhost_eventfd_del, |
836 | 72e22d2f | Avi Kivity | .priority = 10
|
837 | 04097f7c | Avi Kivity | }; |
838 | 7267c094 | Anthony Liguori | hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions));
|
839 | 2817b260 | Avi Kivity | hdev->n_mem_sections = 0;
|
840 | 2817b260 | Avi Kivity | hdev->mem_sections = NULL;
|
841 | d5970055 | Michael S. Tsirkin | hdev->log = NULL;
|
842 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
843 | d5970055 | Michael S. Tsirkin | hdev->log_enabled = false;
|
844 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
845 | f6790af6 | Avi Kivity | memory_listener_register(&hdev->memory_listener, &address_space_memory); |
846 | 5430a28f | mst@redhat.com | hdev->force = force; |
847 | d5970055 | Michael S. Tsirkin | return 0; |
848 | f56a1247 | Michael S. Tsirkin | fail_vq:
|
849 | f56a1247 | Michael S. Tsirkin | while (--i >= 0) { |
850 | f56a1247 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev->vqs + i); |
851 | f56a1247 | Michael S. Tsirkin | } |
852 | d5970055 | Michael S. Tsirkin | fail:
|
853 | d5970055 | Michael S. Tsirkin | r = -errno; |
854 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
855 | d5970055 | Michael S. Tsirkin | return r;
|
856 | d5970055 | Michael S. Tsirkin | } |
857 | d5970055 | Michael S. Tsirkin | |
858 | d5970055 | Michael S. Tsirkin | void vhost_dev_cleanup(struct vhost_dev *hdev) |
859 | d5970055 | Michael S. Tsirkin | { |
860 | f56a1247 | Michael S. Tsirkin | int i;
|
861 | f56a1247 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
862 | f56a1247 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev->vqs + i); |
863 | f56a1247 | Michael S. Tsirkin | } |
864 | 04097f7c | Avi Kivity | memory_listener_unregister(&hdev->memory_listener); |
865 | 7267c094 | Anthony Liguori | g_free(hdev->mem); |
866 | 2817b260 | Avi Kivity | g_free(hdev->mem_sections); |
867 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
868 | d5970055 | Michael S. Tsirkin | } |
869 | d5970055 | Michael S. Tsirkin | |
870 | 5430a28f | mst@redhat.com | bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev) |
871 | 5430a28f | mst@redhat.com | { |
872 | 5430a28f | mst@redhat.com | return !vdev->binding->query_guest_notifiers ||
|
873 | 5430a28f | mst@redhat.com | vdev->binding->query_guest_notifiers(vdev->binding_opaque) || |
874 | 5430a28f | mst@redhat.com | hdev->force; |
875 | 5430a28f | mst@redhat.com | } |
876 | 5430a28f | mst@redhat.com | |
877 | b0b3db79 | Michael S. Tsirkin | /* Stop processing guest IO notifications in qemu.
|
878 | b0b3db79 | Michael S. Tsirkin | * Start processing them in vhost in kernel.
|
879 | b0b3db79 | Michael S. Tsirkin | */
|
880 | b0b3db79 | Michael S. Tsirkin | int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev) |
881 | b0b3db79 | Michael S. Tsirkin | { |
882 | b0b3db79 | Michael S. Tsirkin | int i, r;
|
883 | b0b3db79 | Michael S. Tsirkin | if (!vdev->binding->set_host_notifier) {
|
884 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "binding does not support host notifiers\n");
|
885 | b0b3db79 | Michael S. Tsirkin | r = -ENOSYS; |
886 | b0b3db79 | Michael S. Tsirkin | goto fail;
|
887 | b0b3db79 | Michael S. Tsirkin | } |
888 | b0b3db79 | Michael S. Tsirkin | |
889 | b0b3db79 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
890 | a9f98bb5 | Jason Wang | r = vdev->binding->set_host_notifier(vdev->binding_opaque, |
891 | a9f98bb5 | Jason Wang | hdev->vq_index + i, |
892 | a9f98bb5 | Jason Wang | true);
|
893 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
894 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier binding failed: %d\n", i, -r);
|
895 | b0b3db79 | Michael S. Tsirkin | goto fail_vq;
|
896 | b0b3db79 | Michael S. Tsirkin | } |
897 | b0b3db79 | Michael S. Tsirkin | } |
898 | b0b3db79 | Michael S. Tsirkin | |
899 | b0b3db79 | Michael S. Tsirkin | return 0; |
900 | b0b3db79 | Michael S. Tsirkin | fail_vq:
|
901 | b0b3db79 | Michael S. Tsirkin | while (--i >= 0) { |
902 | a9f98bb5 | Jason Wang | r = vdev->binding->set_host_notifier(vdev->binding_opaque, |
903 | a9f98bb5 | Jason Wang | hdev->vq_index + i, |
904 | a9f98bb5 | Jason Wang | false);
|
905 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
906 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier cleanup error: %d\n", i, -r);
|
907 | b0b3db79 | Michael S. Tsirkin | fflush(stderr); |
908 | b0b3db79 | Michael S. Tsirkin | } |
909 | b0b3db79 | Michael S. Tsirkin | assert (r >= 0);
|
910 | b0b3db79 | Michael S. Tsirkin | } |
911 | b0b3db79 | Michael S. Tsirkin | fail:
|
912 | b0b3db79 | Michael S. Tsirkin | return r;
|
913 | b0b3db79 | Michael S. Tsirkin | } |
914 | b0b3db79 | Michael S. Tsirkin | |
915 | b0b3db79 | Michael S. Tsirkin | /* Stop processing guest IO notifications in vhost.
|
916 | b0b3db79 | Michael S. Tsirkin | * Start processing them in qemu.
|
917 | b0b3db79 | Michael S. Tsirkin | * This might actually run the qemu handlers right away,
|
918 | b0b3db79 | Michael S. Tsirkin | * so virtio in qemu must be completely setup when this is called.
|
919 | b0b3db79 | Michael S. Tsirkin | */
|
920 | b0b3db79 | Michael S. Tsirkin | void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev) |
921 | b0b3db79 | Michael S. Tsirkin | { |
922 | b0b3db79 | Michael S. Tsirkin | int i, r;
|
923 | b0b3db79 | Michael S. Tsirkin | |
924 | b0b3db79 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
925 | a9f98bb5 | Jason Wang | r = vdev->binding->set_host_notifier(vdev->binding_opaque, |
926 | a9f98bb5 | Jason Wang | hdev->vq_index + i, |
927 | a9f98bb5 | Jason Wang | false);
|
928 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
929 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier cleanup failed: %d\n", i, -r);
|
930 | b0b3db79 | Michael S. Tsirkin | fflush(stderr); |
931 | b0b3db79 | Michael S. Tsirkin | } |
932 | b0b3db79 | Michael S. Tsirkin | assert (r >= 0);
|
933 | b0b3db79 | Michael S. Tsirkin | } |
934 | b0b3db79 | Michael S. Tsirkin | } |
935 | b0b3db79 | Michael S. Tsirkin | |
936 | f56a1247 | Michael S. Tsirkin | /* Test and clear event pending status.
|
937 | f56a1247 | Michael S. Tsirkin | * Should be called after unmask to avoid losing events.
|
938 | f56a1247 | Michael S. Tsirkin | */
|
939 | f56a1247 | Michael S. Tsirkin | bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n) |
940 | f56a1247 | Michael S. Tsirkin | { |
941 | a9f98bb5 | Jason Wang | struct vhost_virtqueue *vq = hdev->vqs + n - hdev->vq_index;
|
942 | f56a1247 | Michael S. Tsirkin | assert(hdev->started); |
943 | a9f98bb5 | Jason Wang | assert(n >= hdev->vq_index && n < hdev->vq_index + hdev->nvqs); |
944 | f56a1247 | Michael S. Tsirkin | return event_notifier_test_and_clear(&vq->masked_notifier);
|
945 | f56a1247 | Michael S. Tsirkin | } |
946 | f56a1247 | Michael S. Tsirkin | |
947 | f56a1247 | Michael S. Tsirkin | /* Mask/unmask events from this vq. */
|
948 | f56a1247 | Michael S. Tsirkin | void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, |
949 | f56a1247 | Michael S. Tsirkin | bool mask)
|
950 | f56a1247 | Michael S. Tsirkin | { |
951 | f56a1247 | Michael S. Tsirkin | struct VirtQueue *vvq = virtio_get_queue(vdev, n);
|
952 | a9f98bb5 | Jason Wang | int r, index = n - hdev->vq_index;
|
953 | f56a1247 | Michael S. Tsirkin | |
954 | f56a1247 | Michael S. Tsirkin | assert(hdev->started); |
955 | a9f98bb5 | Jason Wang | assert(n >= hdev->vq_index && n < hdev->vq_index + hdev->nvqs); |
956 | f56a1247 | Michael S. Tsirkin | |
957 | f56a1247 | Michael S. Tsirkin | struct vhost_vring_file file = {
|
958 | a9f98bb5 | Jason Wang | .index = index |
959 | f56a1247 | Michael S. Tsirkin | }; |
960 | f56a1247 | Michael S. Tsirkin | if (mask) {
|
961 | a9f98bb5 | Jason Wang | file.fd = event_notifier_get_fd(&hdev->vqs[index].masked_notifier); |
962 | f56a1247 | Michael S. Tsirkin | } else {
|
963 | f56a1247 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq)); |
964 | f56a1247 | Michael S. Tsirkin | } |
965 | f56a1247 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_VRING_CALL, &file); |
966 | f56a1247 | Michael S. Tsirkin | assert(r >= 0);
|
967 | f56a1247 | Michael S. Tsirkin | } |
968 | f56a1247 | Michael S. Tsirkin | |
969 | b0b3db79 | Michael S. Tsirkin | /* Host notifiers must be enabled at this point. */
|
970 | d5970055 | Michael S. Tsirkin | int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) |
971 | d5970055 | Michael S. Tsirkin | { |
972 | d5970055 | Michael S. Tsirkin | int i, r;
|
973 | 24f4fe34 | Michael S. Tsirkin | |
974 | 24f4fe34 | Michael S. Tsirkin | hdev->started = true;
|
975 | 24f4fe34 | Michael S. Tsirkin | |
976 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(hdev, hdev->log_enabled); |
977 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
978 | 54dd9321 | Michael S. Tsirkin | goto fail_features;
|
979 | d5970055 | Michael S. Tsirkin | } |
980 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem); |
981 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
982 | d5970055 | Michael S. Tsirkin | r = -errno; |
983 | 54dd9321 | Michael S. Tsirkin | goto fail_mem;
|
984 | d5970055 | Michael S. Tsirkin | } |
985 | d154e0ba | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
986 | f56a1247 | Michael S. Tsirkin | r = vhost_virtqueue_start(hdev, |
987 | a9f98bb5 | Jason Wang | vdev, |
988 | a9f98bb5 | Jason Wang | hdev->vqs + i, |
989 | a9f98bb5 | Jason Wang | hdev->vq_index + i); |
990 | d154e0ba | Michael S. Tsirkin | if (r < 0) { |
991 | d154e0ba | Michael S. Tsirkin | goto fail_vq;
|
992 | d154e0ba | Michael S. Tsirkin | } |
993 | d154e0ba | Michael S. Tsirkin | } |
994 | d154e0ba | Michael S. Tsirkin | |
995 | d5970055 | Michael S. Tsirkin | if (hdev->log_enabled) {
|
996 | d5970055 | Michael S. Tsirkin | hdev->log_size = vhost_get_log_size(hdev); |
997 | d5970055 | Michael S. Tsirkin | hdev->log = hdev->log_size ? |
998 | 7267c094 | Anthony Liguori | g_malloc0(hdev->log_size * sizeof *hdev->log) : NULL; |
999 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_LOG_BASE, |
1000 | d5970055 | Michael S. Tsirkin | (uint64_t)(unsigned long)hdev->log); |
1001 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
1002 | d5970055 | Michael S. Tsirkin | r = -errno; |
1003 | 54dd9321 | Michael S. Tsirkin | goto fail_log;
|
1004 | d5970055 | Michael S. Tsirkin | } |
1005 | d5970055 | Michael S. Tsirkin | } |
1006 | d154e0ba | Michael S. Tsirkin | |
1007 | d5970055 | Michael S. Tsirkin | return 0; |
1008 | 54dd9321 | Michael S. Tsirkin | fail_log:
|
1009 | d5970055 | Michael S. Tsirkin | fail_vq:
|
1010 | d5970055 | Michael S. Tsirkin | while (--i >= 0) { |
1011 | f56a1247 | Michael S. Tsirkin | vhost_virtqueue_stop(hdev, |
1012 | a9f98bb5 | Jason Wang | vdev, |
1013 | a9f98bb5 | Jason Wang | hdev->vqs + i, |
1014 | a9f98bb5 | Jason Wang | hdev->vq_index + i); |
1015 | d5970055 | Michael S. Tsirkin | } |
1016 | a9f98bb5 | Jason Wang | i = hdev->nvqs; |
1017 | 54dd9321 | Michael S. Tsirkin | fail_mem:
|
1018 | 54dd9321 | Michael S. Tsirkin | fail_features:
|
1019 | 24f4fe34 | Michael S. Tsirkin | |
1020 | 24f4fe34 | Michael S. Tsirkin | hdev->started = false;
|
1021 | d5970055 | Michael S. Tsirkin | return r;
|
1022 | d5970055 | Michael S. Tsirkin | } |
1023 | d5970055 | Michael S. Tsirkin | |
1024 | b0b3db79 | Michael S. Tsirkin | /* Host notifiers must be enabled at this point. */
|
1025 | d5970055 | Michael S. Tsirkin | void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) |
1026 | d5970055 | Michael S. Tsirkin | { |
1027 | a9f98bb5 | Jason Wang | int i;
|
1028 | 54dd9321 | Michael S. Tsirkin | |
1029 | d5970055 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
1030 | f56a1247 | Michael S. Tsirkin | vhost_virtqueue_stop(hdev, |
1031 | a9f98bb5 | Jason Wang | vdev, |
1032 | a9f98bb5 | Jason Wang | hdev->vqs + i, |
1033 | a9f98bb5 | Jason Wang | hdev->vq_index + i); |
1034 | d5970055 | Michael S. Tsirkin | } |
1035 | 6b37a23d | Michael S. Tsirkin | vhost_log_sync_range(hdev, 0, ~0x0ull); |
1036 | 54dd9321 | Michael S. Tsirkin | |
1037 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
1038 | 7267c094 | Anthony Liguori | g_free(hdev->log); |
1039 | c1be973a | Michael S. Tsirkin | hdev->log = NULL;
|
1040 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
1041 | d5970055 | Michael S. Tsirkin | } |