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1 | 432d268c | Jun Nakajima | /*
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2 | 432d268c | Jun Nakajima | * Copyright (C) 2011 Citrix Ltd.
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3 | 432d268c | Jun Nakajima | *
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4 | 432d268c | Jun Nakajima | * This work is licensed under the terms of the GNU GPL, version 2. See
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5 | 432d268c | Jun Nakajima | * the COPYING file in the top-level directory.
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6 | 432d268c | Jun Nakajima | *
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7 | 432d268c | Jun Nakajima | */
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8 | 432d268c | Jun Nakajima | |
9 | 432d268c | Jun Nakajima | #include "config.h" |
10 | 432d268c | Jun Nakajima | |
11 | 432d268c | Jun Nakajima | #include <sys/resource.h> |
12 | 432d268c | Jun Nakajima | |
13 | 432d268c | Jun Nakajima | #include "hw/xen_backend.h" |
14 | 432d268c | Jun Nakajima | #include "blockdev.h" |
15 | ea6c5f8f | John Baboval | #include "bitmap.h" |
16 | 432d268c | Jun Nakajima | |
17 | 432d268c | Jun Nakajima | #include <xen/hvm/params.h> |
18 | 432d268c | Jun Nakajima | #include <sys/mman.h> |
19 | 432d268c | Jun Nakajima | |
20 | 432d268c | Jun Nakajima | #include "xen-mapcache.h" |
21 | 432d268c | Jun Nakajima | #include "trace.h" |
22 | 432d268c | Jun Nakajima | |
23 | 432d268c | Jun Nakajima | |
24 | 432d268c | Jun Nakajima | //#define MAPCACHE_DEBUG
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25 | 432d268c | Jun Nakajima | |
26 | 432d268c | Jun Nakajima | #ifdef MAPCACHE_DEBUG
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27 | 432d268c | Jun Nakajima | # define DPRINTF(fmt, ...) do { \ |
28 | 432d268c | Jun Nakajima | fprintf(stderr, "xen_mapcache: " fmt, ## __VA_ARGS__); \ |
29 | 432d268c | Jun Nakajima | } while (0) |
30 | 432d268c | Jun Nakajima | #else
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31 | 432d268c | Jun Nakajima | # define DPRINTF(fmt, ...) do { } while (0) |
32 | 432d268c | Jun Nakajima | #endif
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33 | 432d268c | Jun Nakajima | |
34 | 432d268c | Jun Nakajima | #if defined(__i386__)
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35 | 432d268c | Jun Nakajima | # define MCACHE_BUCKET_SHIFT 16 |
36 | ea6c5f8f | John Baboval | # define MCACHE_MAX_SIZE (1UL<<31) /* 2GB Cap */ |
37 | 432d268c | Jun Nakajima | #elif defined(__x86_64__)
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38 | 432d268c | Jun Nakajima | # define MCACHE_BUCKET_SHIFT 20 |
39 | ea6c5f8f | John Baboval | # define MCACHE_MAX_SIZE (1UL<<35) /* 32GB Cap */ |
40 | 432d268c | Jun Nakajima | #endif
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41 | 432d268c | Jun Nakajima | #define MCACHE_BUCKET_SIZE (1UL << MCACHE_BUCKET_SHIFT) |
42 | 432d268c | Jun Nakajima | |
43 | 432d268c | Jun Nakajima | typedef struct MapCacheEntry { |
44 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
45 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
46 | 432d268c | Jun Nakajima | DECLARE_BITMAP(valid_mapping, MCACHE_BUCKET_SIZE >> XC_PAGE_SHIFT); |
47 | 432d268c | Jun Nakajima | uint8_t lock; |
48 | 432d268c | Jun Nakajima | struct MapCacheEntry *next;
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49 | 432d268c | Jun Nakajima | } MapCacheEntry; |
50 | 432d268c | Jun Nakajima | |
51 | 432d268c | Jun Nakajima | typedef struct MapCacheRev { |
52 | 432d268c | Jun Nakajima | uint8_t *vaddr_req; |
53 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
54 | 432d268c | Jun Nakajima | QTAILQ_ENTRY(MapCacheRev) next; |
55 | 432d268c | Jun Nakajima | } MapCacheRev; |
56 | 432d268c | Jun Nakajima | |
57 | 432d268c | Jun Nakajima | typedef struct MapCache { |
58 | 432d268c | Jun Nakajima | MapCacheEntry *entry; |
59 | 432d268c | Jun Nakajima | unsigned long nr_buckets; |
60 | 432d268c | Jun Nakajima | QTAILQ_HEAD(map_cache_head, MapCacheRev) locked_entries; |
61 | 432d268c | Jun Nakajima | |
62 | 432d268c | Jun Nakajima | /* For most cases (>99.9%), the page address is the same. */
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63 | 432d268c | Jun Nakajima | target_phys_addr_t last_address_index; |
64 | 432d268c | Jun Nakajima | uint8_t *last_address_vaddr; |
65 | 432d268c | Jun Nakajima | unsigned long max_mcache_size; |
66 | 432d268c | Jun Nakajima | unsigned int mcache_bucket_shift; |
67 | 432d268c | Jun Nakajima | } MapCache; |
68 | 432d268c | Jun Nakajima | |
69 | 432d268c | Jun Nakajima | static MapCache *mapcache;
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70 | 432d268c | Jun Nakajima | |
71 | 432d268c | Jun Nakajima | void qemu_map_cache_init(void) |
72 | 432d268c | Jun Nakajima | { |
73 | 432d268c | Jun Nakajima | unsigned long size; |
74 | 432d268c | Jun Nakajima | struct rlimit rlimit_as;
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75 | 432d268c | Jun Nakajima | |
76 | 432d268c | Jun Nakajima | mapcache = qemu_mallocz(sizeof (MapCache));
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77 | 432d268c | Jun Nakajima | |
78 | 432d268c | Jun Nakajima | QTAILQ_INIT(&mapcache->locked_entries); |
79 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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80 | 432d268c | Jun Nakajima | |
81 | 432d268c | Jun Nakajima | getrlimit(RLIMIT_AS, &rlimit_as); |
82 | ea6c5f8f | John Baboval | if (rlimit_as.rlim_max < MCACHE_MAX_SIZE) {
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83 | ea6c5f8f | John Baboval | rlimit_as.rlim_cur = rlimit_as.rlim_max; |
84 | ea6c5f8f | John Baboval | } else {
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85 | ea6c5f8f | John Baboval | rlimit_as.rlim_cur = MCACHE_MAX_SIZE; |
86 | ea6c5f8f | John Baboval | } |
87 | ea6c5f8f | John Baboval | |
88 | 432d268c | Jun Nakajima | setrlimit(RLIMIT_AS, &rlimit_as); |
89 | ea6c5f8f | John Baboval | mapcache->max_mcache_size = rlimit_as.rlim_cur; |
90 | 432d268c | Jun Nakajima | |
91 | 432d268c | Jun Nakajima | mapcache->nr_buckets = |
92 | 432d268c | Jun Nakajima | (((mapcache->max_mcache_size >> XC_PAGE_SHIFT) + |
93 | 432d268c | Jun Nakajima | (1UL << (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)) - 1) >> |
94 | 432d268c | Jun Nakajima | (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)); |
95 | 432d268c | Jun Nakajima | |
96 | 432d268c | Jun Nakajima | size = mapcache->nr_buckets * sizeof (MapCacheEntry);
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97 | 432d268c | Jun Nakajima | size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1); |
98 | 432d268c | Jun Nakajima | DPRINTF("qemu_map_cache_init, nr_buckets = %lx size %lu\n", mapcache->nr_buckets, size);
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99 | 432d268c | Jun Nakajima | mapcache->entry = qemu_mallocz(size); |
100 | 432d268c | Jun Nakajima | } |
101 | 432d268c | Jun Nakajima | |
102 | 432d268c | Jun Nakajima | static void qemu_remap_bucket(MapCacheEntry *entry, |
103 | 432d268c | Jun Nakajima | target_phys_addr_t size, |
104 | 432d268c | Jun Nakajima | target_phys_addr_t address_index) |
105 | 432d268c | Jun Nakajima | { |
106 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
107 | 432d268c | Jun Nakajima | xen_pfn_t *pfns; |
108 | 432d268c | Jun Nakajima | int *err;
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109 | ea6c5f8f | John Baboval | unsigned int i; |
110 | 432d268c | Jun Nakajima | target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; |
111 | 432d268c | Jun Nakajima | |
112 | 432d268c | Jun Nakajima | trace_qemu_remap_bucket(address_index); |
113 | 432d268c | Jun Nakajima | |
114 | 432d268c | Jun Nakajima | pfns = qemu_mallocz(nb_pfn * sizeof (xen_pfn_t));
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115 | 432d268c | Jun Nakajima | err = qemu_mallocz(nb_pfn * sizeof (int)); |
116 | 432d268c | Jun Nakajima | |
117 | 432d268c | Jun Nakajima | if (entry->vaddr_base != NULL) { |
118 | 432d268c | Jun Nakajima | if (munmap(entry->vaddr_base, size) != 0) { |
119 | 432d268c | Jun Nakajima | perror("unmap fails");
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120 | 432d268c | Jun Nakajima | exit(-1);
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121 | 432d268c | Jun Nakajima | } |
122 | 432d268c | Jun Nakajima | } |
123 | 432d268c | Jun Nakajima | |
124 | 432d268c | Jun Nakajima | for (i = 0; i < nb_pfn; i++) { |
125 | 432d268c | Jun Nakajima | pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT-XC_PAGE_SHIFT)) + i; |
126 | 432d268c | Jun Nakajima | } |
127 | 432d268c | Jun Nakajima | |
128 | 432d268c | Jun Nakajima | vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE, |
129 | 432d268c | Jun Nakajima | pfns, err, nb_pfn); |
130 | 432d268c | Jun Nakajima | if (vaddr_base == NULL) { |
131 | 432d268c | Jun Nakajima | perror("xc_map_foreign_bulk");
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132 | 432d268c | Jun Nakajima | exit(-1);
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133 | 432d268c | Jun Nakajima | } |
134 | 432d268c | Jun Nakajima | |
135 | 432d268c | Jun Nakajima | entry->vaddr_base = vaddr_base; |
136 | 432d268c | Jun Nakajima | entry->paddr_index = address_index; |
137 | 432d268c | Jun Nakajima | |
138 | ea6c5f8f | John Baboval | bitmap_zero(entry->valid_mapping, nb_pfn); |
139 | ea6c5f8f | John Baboval | for (i = 0; i < nb_pfn; i++) { |
140 | ea6c5f8f | John Baboval | if (!err[i]) {
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141 | ea6c5f8f | John Baboval | bitmap_set(entry->valid_mapping, i, 1);
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142 | 432d268c | Jun Nakajima | } |
143 | 432d268c | Jun Nakajima | } |
144 | 432d268c | Jun Nakajima | |
145 | 432d268c | Jun Nakajima | qemu_free(pfns); |
146 | 432d268c | Jun Nakajima | qemu_free(err); |
147 | 432d268c | Jun Nakajima | } |
148 | 432d268c | Jun Nakajima | |
149 | 432d268c | Jun Nakajima | uint8_t *qemu_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, uint8_t lock) |
150 | 432d268c | Jun Nakajima | { |
151 | 432d268c | Jun Nakajima | MapCacheEntry *entry, *pentry = NULL;
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152 | 432d268c | Jun Nakajima | target_phys_addr_t address_index = phys_addr >> MCACHE_BUCKET_SHIFT; |
153 | 432d268c | Jun Nakajima | target_phys_addr_t address_offset = phys_addr & (MCACHE_BUCKET_SIZE - 1);
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154 | 432d268c | Jun Nakajima | |
155 | 432d268c | Jun Nakajima | trace_qemu_map_cache(phys_addr); |
156 | 432d268c | Jun Nakajima | |
157 | 432d268c | Jun Nakajima | if (address_index == mapcache->last_address_index && !lock) {
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158 | 432d268c | Jun Nakajima | trace_qemu_map_cache_return(mapcache->last_address_vaddr + address_offset); |
159 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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160 | 432d268c | Jun Nakajima | } |
161 | 432d268c | Jun Nakajima | |
162 | 432d268c | Jun Nakajima | entry = &mapcache->entry[address_index % mapcache->nr_buckets]; |
163 | 432d268c | Jun Nakajima | |
164 | 432d268c | Jun Nakajima | while (entry && entry->lock && entry->paddr_index != address_index && entry->vaddr_base) {
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165 | 432d268c | Jun Nakajima | pentry = entry; |
166 | 432d268c | Jun Nakajima | entry = entry->next; |
167 | 432d268c | Jun Nakajima | } |
168 | 432d268c | Jun Nakajima | if (!entry) {
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169 | 432d268c | Jun Nakajima | entry = qemu_mallocz(sizeof (MapCacheEntry));
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170 | 432d268c | Jun Nakajima | pentry->next = entry; |
171 | 432d268c | Jun Nakajima | qemu_remap_bucket(entry, size ? : MCACHE_BUCKET_SIZE, address_index); |
172 | 432d268c | Jun Nakajima | } else if (!entry->lock) { |
173 | 432d268c | Jun Nakajima | if (!entry->vaddr_base || entry->paddr_index != address_index ||
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174 | 432d268c | Jun Nakajima | !test_bit(address_offset >> XC_PAGE_SHIFT, entry->valid_mapping)) { |
175 | 432d268c | Jun Nakajima | qemu_remap_bucket(entry, size ? : MCACHE_BUCKET_SIZE, address_index); |
176 | 432d268c | Jun Nakajima | } |
177 | 432d268c | Jun Nakajima | } |
178 | 432d268c | Jun Nakajima | |
179 | 432d268c | Jun Nakajima | if (!test_bit(address_offset >> XC_PAGE_SHIFT, entry->valid_mapping)) {
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180 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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181 | 432d268c | Jun Nakajima | trace_qemu_map_cache_return(NULL);
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182 | 432d268c | Jun Nakajima | return NULL; |
183 | 432d268c | Jun Nakajima | } |
184 | 432d268c | Jun Nakajima | |
185 | 432d268c | Jun Nakajima | mapcache->last_address_index = address_index; |
186 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = entry->vaddr_base; |
187 | 432d268c | Jun Nakajima | if (lock) {
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188 | 432d268c | Jun Nakajima | MapCacheRev *reventry = qemu_mallocz(sizeof(MapCacheRev));
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189 | 432d268c | Jun Nakajima | entry->lock++; |
190 | 432d268c | Jun Nakajima | reventry->vaddr_req = mapcache->last_address_vaddr + address_offset; |
191 | 432d268c | Jun Nakajima | reventry->paddr_index = mapcache->last_address_index; |
192 | 432d268c | Jun Nakajima | QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next); |
193 | 432d268c | Jun Nakajima | } |
194 | 432d268c | Jun Nakajima | |
195 | 432d268c | Jun Nakajima | trace_qemu_map_cache_return(mapcache->last_address_vaddr + address_offset); |
196 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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197 | 432d268c | Jun Nakajima | } |
198 | 432d268c | Jun Nakajima | |
199 | 050a0ddf | Anthony PERARD | void qemu_map_cache_unlock(void *buffer) |
200 | 050a0ddf | Anthony PERARD | { |
201 | 050a0ddf | Anthony PERARD | MapCacheEntry *entry = NULL, *pentry = NULL; |
202 | 050a0ddf | Anthony PERARD | MapCacheRev *reventry; |
203 | 050a0ddf | Anthony PERARD | target_phys_addr_t paddr_index; |
204 | 050a0ddf | Anthony PERARD | int found = 0; |
205 | 050a0ddf | Anthony PERARD | |
206 | 050a0ddf | Anthony PERARD | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
207 | 050a0ddf | Anthony PERARD | if (reventry->vaddr_req == buffer) {
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208 | 050a0ddf | Anthony PERARD | paddr_index = reventry->paddr_index; |
209 | 050a0ddf | Anthony PERARD | found = 1;
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210 | 050a0ddf | Anthony PERARD | break;
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211 | 050a0ddf | Anthony PERARD | } |
212 | 050a0ddf | Anthony PERARD | } |
213 | 050a0ddf | Anthony PERARD | if (!found) {
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214 | 050a0ddf | Anthony PERARD | return;
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215 | 050a0ddf | Anthony PERARD | } |
216 | 050a0ddf | Anthony PERARD | QTAILQ_REMOVE(&mapcache->locked_entries, reventry, next); |
217 | 050a0ddf | Anthony PERARD | qemu_free(reventry); |
218 | 050a0ddf | Anthony PERARD | |
219 | 050a0ddf | Anthony PERARD | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
220 | 050a0ddf | Anthony PERARD | while (entry && entry->paddr_index != paddr_index) {
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221 | 050a0ddf | Anthony PERARD | pentry = entry; |
222 | 050a0ddf | Anthony PERARD | entry = entry->next; |
223 | 050a0ddf | Anthony PERARD | } |
224 | 050a0ddf | Anthony PERARD | if (!entry) {
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225 | 050a0ddf | Anthony PERARD | return;
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226 | 050a0ddf | Anthony PERARD | } |
227 | 050a0ddf | Anthony PERARD | if (entry->lock > 0) { |
228 | 050a0ddf | Anthony PERARD | entry->lock--; |
229 | 050a0ddf | Anthony PERARD | } |
230 | 050a0ddf | Anthony PERARD | } |
231 | 050a0ddf | Anthony PERARD | |
232 | 432d268c | Jun Nakajima | ram_addr_t qemu_ram_addr_from_mapcache(void *ptr)
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233 | 432d268c | Jun Nakajima | { |
234 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
235 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
236 | 432d268c | Jun Nakajima | int found = 0; |
237 | 432d268c | Jun Nakajima | |
238 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
239 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == ptr) {
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240 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
241 | 432d268c | Jun Nakajima | found = 1;
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242 | 432d268c | Jun Nakajima | break;
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243 | 432d268c | Jun Nakajima | } |
244 | 432d268c | Jun Nakajima | } |
245 | 432d268c | Jun Nakajima | if (!found) {
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246 | 432d268c | Jun Nakajima | fprintf(stderr, "qemu_ram_addr_from_mapcache, could not find %p\n", ptr);
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247 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
248 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, |
249 | 432d268c | Jun Nakajima | reventry->vaddr_req); |
250 | 432d268c | Jun Nakajima | } |
251 | 432d268c | Jun Nakajima | abort(); |
252 | 432d268c | Jun Nakajima | return 0; |
253 | 432d268c | Jun Nakajima | } |
254 | 432d268c | Jun Nakajima | |
255 | 432d268c | Jun Nakajima | return paddr_index << MCACHE_BUCKET_SHIFT;
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256 | 432d268c | Jun Nakajima | } |
257 | 432d268c | Jun Nakajima | |
258 | 432d268c | Jun Nakajima | void qemu_invalidate_entry(uint8_t *buffer)
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259 | 432d268c | Jun Nakajima | { |
260 | 432d268c | Jun Nakajima | MapCacheEntry *entry = NULL, *pentry = NULL; |
261 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
262 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
263 | 432d268c | Jun Nakajima | int found = 0; |
264 | 432d268c | Jun Nakajima | |
265 | 432d268c | Jun Nakajima | if (mapcache->last_address_vaddr == buffer) {
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266 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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267 | 432d268c | Jun Nakajima | } |
268 | 432d268c | Jun Nakajima | |
269 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
270 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == buffer) {
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271 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
272 | 432d268c | Jun Nakajima | found = 1;
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273 | 432d268c | Jun Nakajima | break;
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274 | 432d268c | Jun Nakajima | } |
275 | 432d268c | Jun Nakajima | } |
276 | 432d268c | Jun Nakajima | if (!found) {
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277 | 432d268c | Jun Nakajima | DPRINTF("qemu_invalidate_entry, could not find %p\n", buffer);
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278 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
279 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req); |
280 | 432d268c | Jun Nakajima | } |
281 | 432d268c | Jun Nakajima | return;
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282 | 432d268c | Jun Nakajima | } |
283 | 432d268c | Jun Nakajima | QTAILQ_REMOVE(&mapcache->locked_entries, reventry, next); |
284 | 432d268c | Jun Nakajima | qemu_free(reventry); |
285 | 432d268c | Jun Nakajima | |
286 | 432d268c | Jun Nakajima | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
287 | 432d268c | Jun Nakajima | while (entry && entry->paddr_index != paddr_index) {
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288 | 432d268c | Jun Nakajima | pentry = entry; |
289 | 432d268c | Jun Nakajima | entry = entry->next; |
290 | 432d268c | Jun Nakajima | } |
291 | 432d268c | Jun Nakajima | if (!entry) {
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292 | 432d268c | Jun Nakajima | DPRINTF("Trying to unmap address %p that is not in the mapcache!\n", buffer);
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293 | 432d268c | Jun Nakajima | return;
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294 | 432d268c | Jun Nakajima | } |
295 | 432d268c | Jun Nakajima | entry->lock--; |
296 | 432d268c | Jun Nakajima | if (entry->lock > 0 || pentry == NULL) { |
297 | 432d268c | Jun Nakajima | return;
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298 | 432d268c | Jun Nakajima | } |
299 | 432d268c | Jun Nakajima | |
300 | 432d268c | Jun Nakajima | pentry->next = entry->next; |
301 | 432d268c | Jun Nakajima | if (munmap(entry->vaddr_base, MCACHE_BUCKET_SIZE) != 0) { |
302 | 432d268c | Jun Nakajima | perror("unmap fails");
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303 | 432d268c | Jun Nakajima | exit(-1);
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304 | 432d268c | Jun Nakajima | } |
305 | 432d268c | Jun Nakajima | qemu_free(entry); |
306 | 432d268c | Jun Nakajima | } |
307 | 432d268c | Jun Nakajima | |
308 | 432d268c | Jun Nakajima | void qemu_invalidate_map_cache(void) |
309 | 432d268c | Jun Nakajima | { |
310 | 432d268c | Jun Nakajima | unsigned long i; |
311 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
312 | 432d268c | Jun Nakajima | |
313 | 432d268c | Jun Nakajima | /* Flush pending AIO before destroying the mapcache */
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314 | 432d268c | Jun Nakajima | qemu_aio_flush(); |
315 | 432d268c | Jun Nakajima | |
316 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
317 | 432d268c | Jun Nakajima | DPRINTF("There should be no locked mappings at this time, "
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318 | 432d268c | Jun Nakajima | "but "TARGET_FMT_plx" -> %p is present\n", |
319 | 432d268c | Jun Nakajima | reventry->paddr_index, reventry->vaddr_req); |
320 | 432d268c | Jun Nakajima | } |
321 | 432d268c | Jun Nakajima | |
322 | 432d268c | Jun Nakajima | mapcache_lock(); |
323 | 432d268c | Jun Nakajima | |
324 | 432d268c | Jun Nakajima | for (i = 0; i < mapcache->nr_buckets; i++) { |
325 | 432d268c | Jun Nakajima | MapCacheEntry *entry = &mapcache->entry[i]; |
326 | 432d268c | Jun Nakajima | |
327 | 432d268c | Jun Nakajima | if (entry->vaddr_base == NULL) { |
328 | 432d268c | Jun Nakajima | continue;
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329 | 432d268c | Jun Nakajima | } |
330 | 432d268c | Jun Nakajima | |
331 | 432d268c | Jun Nakajima | if (munmap(entry->vaddr_base, MCACHE_BUCKET_SIZE) != 0) { |
332 | 432d268c | Jun Nakajima | perror("unmap fails");
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333 | 432d268c | Jun Nakajima | exit(-1);
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334 | 432d268c | Jun Nakajima | } |
335 | 432d268c | Jun Nakajima | |
336 | 432d268c | Jun Nakajima | entry->paddr_index = 0;
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337 | 432d268c | Jun Nakajima | entry->vaddr_base = NULL;
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338 | 432d268c | Jun Nakajima | } |
339 | 432d268c | Jun Nakajima | |
340 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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341 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = NULL;
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342 | 432d268c | Jun Nakajima | |
343 | 432d268c | Jun Nakajima | mapcache_unlock(); |
344 | 432d268c | Jun Nakajima | } |
345 | 432d268c | Jun Nakajima | |
346 | 432d268c | Jun Nakajima | uint8_t *xen_map_block(target_phys_addr_t phys_addr, target_phys_addr_t size) |
347 | 432d268c | Jun Nakajima | { |
348 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
349 | 432d268c | Jun Nakajima | xen_pfn_t *pfns; |
350 | 432d268c | Jun Nakajima | int *err;
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351 | 432d268c | Jun Nakajima | unsigned int i; |
352 | 432d268c | Jun Nakajima | target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; |
353 | 432d268c | Jun Nakajima | |
354 | 432d268c | Jun Nakajima | trace_xen_map_block(phys_addr, size); |
355 | 432d268c | Jun Nakajima | phys_addr >>= XC_PAGE_SHIFT; |
356 | 432d268c | Jun Nakajima | |
357 | 432d268c | Jun Nakajima | pfns = qemu_mallocz(nb_pfn * sizeof (xen_pfn_t));
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358 | 432d268c | Jun Nakajima | err = qemu_mallocz(nb_pfn * sizeof (int)); |
359 | 432d268c | Jun Nakajima | |
360 | 432d268c | Jun Nakajima | for (i = 0; i < nb_pfn; i++) { |
361 | 432d268c | Jun Nakajima | pfns[i] = phys_addr + i; |
362 | 432d268c | Jun Nakajima | } |
363 | 432d268c | Jun Nakajima | |
364 | 432d268c | Jun Nakajima | vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE, |
365 | 432d268c | Jun Nakajima | pfns, err, nb_pfn); |
366 | 432d268c | Jun Nakajima | if (vaddr_base == NULL) { |
367 | 432d268c | Jun Nakajima | perror("xc_map_foreign_bulk");
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368 | 432d268c | Jun Nakajima | exit(-1);
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369 | 432d268c | Jun Nakajima | } |
370 | 432d268c | Jun Nakajima | |
371 | 432d268c | Jun Nakajima | qemu_free(pfns); |
372 | 432d268c | Jun Nakajima | qemu_free(err); |
373 | 432d268c | Jun Nakajima | |
374 | 432d268c | Jun Nakajima | return vaddr_base;
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375 | 432d268c | Jun Nakajima | } |