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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 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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8 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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9 | 432d268c | Jun Nakajima | */
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10 | 432d268c | Jun Nakajima | |
11 | 432d268c | Jun Nakajima | #include "config.h" |
12 | 432d268c | Jun Nakajima | |
13 | 432d268c | Jun Nakajima | #include <sys/resource.h> |
14 | 432d268c | Jun Nakajima | |
15 | 432d268c | Jun Nakajima | #include "hw/xen_backend.h" |
16 | 432d268c | Jun Nakajima | #include "blockdev.h" |
17 | ea6c5f8f | John Baboval | #include "bitmap.h" |
18 | 432d268c | Jun Nakajima | |
19 | 432d268c | Jun Nakajima | #include <xen/hvm/params.h> |
20 | 432d268c | Jun Nakajima | #include <sys/mman.h> |
21 | 432d268c | Jun Nakajima | |
22 | 432d268c | Jun Nakajima | #include "xen-mapcache.h" |
23 | 432d268c | Jun Nakajima | #include "trace.h" |
24 | 432d268c | Jun Nakajima | |
25 | 432d268c | Jun Nakajima | |
26 | 432d268c | Jun Nakajima | //#define MAPCACHE_DEBUG
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27 | 432d268c | Jun Nakajima | |
28 | 432d268c | Jun Nakajima | #ifdef MAPCACHE_DEBUG
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29 | 432d268c | Jun Nakajima | # define DPRINTF(fmt, ...) do { \ |
30 | 432d268c | Jun Nakajima | fprintf(stderr, "xen_mapcache: " fmt, ## __VA_ARGS__); \ |
31 | 432d268c | Jun Nakajima | } while (0) |
32 | 432d268c | Jun Nakajima | #else
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33 | 432d268c | Jun Nakajima | # define DPRINTF(fmt, ...) do { } while (0) |
34 | 432d268c | Jun Nakajima | #endif
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35 | 432d268c | Jun Nakajima | |
36 | 432d268c | Jun Nakajima | #if defined(__i386__)
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37 | 432d268c | Jun Nakajima | # define MCACHE_BUCKET_SHIFT 16 |
38 | ea6c5f8f | John Baboval | # define MCACHE_MAX_SIZE (1UL<<31) /* 2GB Cap */ |
39 | 432d268c | Jun Nakajima | #elif defined(__x86_64__)
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40 | 432d268c | Jun Nakajima | # define MCACHE_BUCKET_SHIFT 20 |
41 | ea6c5f8f | John Baboval | # define MCACHE_MAX_SIZE (1UL<<35) /* 32GB Cap */ |
42 | 432d268c | Jun Nakajima | #endif
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43 | 432d268c | Jun Nakajima | #define MCACHE_BUCKET_SIZE (1UL << MCACHE_BUCKET_SHIFT) |
44 | 432d268c | Jun Nakajima | |
45 | 56c119e5 | Anthony PERARD | /* This is the size of the virtual address space reserve to QEMU that will not
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46 | 56c119e5 | Anthony PERARD | * be use by MapCache.
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47 | 56c119e5 | Anthony PERARD | * From empirical tests I observed that qemu use 75MB more than the
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48 | 56c119e5 | Anthony PERARD | * max_mcache_size.
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49 | 56c119e5 | Anthony PERARD | */
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50 | 56c119e5 | Anthony PERARD | #define NON_MCACHE_MEMORY_SIZE (80 * 1024 * 1024) |
51 | 56c119e5 | Anthony PERARD | |
52 | e41d7c69 | Jan Kiszka | #define mapcache_lock() ((void)0) |
53 | e41d7c69 | Jan Kiszka | #define mapcache_unlock() ((void)0) |
54 | e41d7c69 | Jan Kiszka | |
55 | 432d268c | Jun Nakajima | typedef struct MapCacheEntry { |
56 | a8170e5e | Avi Kivity | hwaddr paddr_index; |
57 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
58 | c13390cd | Stefano Stabellini | unsigned long *valid_mapping; |
59 | 432d268c | Jun Nakajima | uint8_t lock; |
60 | a8170e5e | Avi Kivity | hwaddr size; |
61 | 432d268c | Jun Nakajima | struct MapCacheEntry *next;
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62 | 432d268c | Jun Nakajima | } MapCacheEntry; |
63 | 432d268c | Jun Nakajima | |
64 | 432d268c | Jun Nakajima | typedef struct MapCacheRev { |
65 | 432d268c | Jun Nakajima | uint8_t *vaddr_req; |
66 | a8170e5e | Avi Kivity | hwaddr paddr_index; |
67 | a8170e5e | Avi Kivity | hwaddr size; |
68 | 432d268c | Jun Nakajima | QTAILQ_ENTRY(MapCacheRev) next; |
69 | 432d268c | Jun Nakajima | } MapCacheRev; |
70 | 432d268c | Jun Nakajima | |
71 | 432d268c | Jun Nakajima | typedef struct MapCache { |
72 | 432d268c | Jun Nakajima | MapCacheEntry *entry; |
73 | 432d268c | Jun Nakajima | unsigned long nr_buckets; |
74 | 432d268c | Jun Nakajima | QTAILQ_HEAD(map_cache_head, MapCacheRev) locked_entries; |
75 | 432d268c | Jun Nakajima | |
76 | 432d268c | Jun Nakajima | /* For most cases (>99.9%), the page address is the same. */
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77 | a8170e5e | Avi Kivity | hwaddr last_address_index; |
78 | 432d268c | Jun Nakajima | uint8_t *last_address_vaddr; |
79 | 432d268c | Jun Nakajima | unsigned long max_mcache_size; |
80 | 432d268c | Jun Nakajima | unsigned int mcache_bucket_shift; |
81 | cd1ba7de | Anthony PERARD | |
82 | cd1ba7de | Anthony PERARD | phys_offset_to_gaddr_t phys_offset_to_gaddr; |
83 | cd1ba7de | Anthony PERARD | void *opaque;
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84 | 432d268c | Jun Nakajima | } MapCache; |
85 | 432d268c | Jun Nakajima | |
86 | 432d268c | Jun Nakajima | static MapCache *mapcache;
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87 | 432d268c | Jun Nakajima | |
88 | c13390cd | Stefano Stabellini | static inline int test_bits(int nr, int size, const unsigned long *addr) |
89 | c13390cd | Stefano Stabellini | { |
90 | c13390cd | Stefano Stabellini | unsigned long res = find_next_zero_bit(addr, size + nr, nr); |
91 | c13390cd | Stefano Stabellini | if (res >= nr + size)
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92 | c13390cd | Stefano Stabellini | return 1; |
93 | c13390cd | Stefano Stabellini | else
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94 | c13390cd | Stefano Stabellini | return 0; |
95 | c13390cd | Stefano Stabellini | } |
96 | c13390cd | Stefano Stabellini | |
97 | cd1ba7de | Anthony PERARD | void xen_map_cache_init(phys_offset_to_gaddr_t f, void *opaque) |
98 | 432d268c | Jun Nakajima | { |
99 | 432d268c | Jun Nakajima | unsigned long size; |
100 | 432d268c | Jun Nakajima | struct rlimit rlimit_as;
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101 | 432d268c | Jun Nakajima | |
102 | 7267c094 | Anthony Liguori | mapcache = g_malloc0(sizeof (MapCache));
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103 | 432d268c | Jun Nakajima | |
104 | cd1ba7de | Anthony PERARD | mapcache->phys_offset_to_gaddr = f; |
105 | cd1ba7de | Anthony PERARD | mapcache->opaque = opaque; |
106 | cd1ba7de | Anthony PERARD | |
107 | 432d268c | Jun Nakajima | QTAILQ_INIT(&mapcache->locked_entries); |
108 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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109 | 432d268c | Jun Nakajima | |
110 | 56c119e5 | Anthony PERARD | if (geteuid() == 0) { |
111 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_cur = RLIM_INFINITY; |
112 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_max = RLIM_INFINITY; |
113 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = MCACHE_MAX_SIZE; |
114 | ea6c5f8f | John Baboval | } else {
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115 | 56c119e5 | Anthony PERARD | getrlimit(RLIMIT_AS, &rlimit_as); |
116 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_cur = rlimit_as.rlim_max; |
117 | 56c119e5 | Anthony PERARD | |
118 | 56c119e5 | Anthony PERARD | if (rlimit_as.rlim_max != RLIM_INFINITY) {
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119 | 56c119e5 | Anthony PERARD | fprintf(stderr, "Warning: QEMU's maximum size of virtual"
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120 | 56c119e5 | Anthony PERARD | " memory is not infinity.\n");
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121 | 56c119e5 | Anthony PERARD | } |
122 | 56c119e5 | Anthony PERARD | if (rlimit_as.rlim_max < MCACHE_MAX_SIZE + NON_MCACHE_MEMORY_SIZE) {
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123 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = rlimit_as.rlim_max - |
124 | 56c119e5 | Anthony PERARD | NON_MCACHE_MEMORY_SIZE; |
125 | 56c119e5 | Anthony PERARD | } else {
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126 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = MCACHE_MAX_SIZE; |
127 | 56c119e5 | Anthony PERARD | } |
128 | ea6c5f8f | John Baboval | } |
129 | ea6c5f8f | John Baboval | |
130 | 432d268c | Jun Nakajima | setrlimit(RLIMIT_AS, &rlimit_as); |
131 | 432d268c | Jun Nakajima | |
132 | 432d268c | Jun Nakajima | mapcache->nr_buckets = |
133 | 432d268c | Jun Nakajima | (((mapcache->max_mcache_size >> XC_PAGE_SHIFT) + |
134 | 432d268c | Jun Nakajima | (1UL << (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)) - 1) >> |
135 | 432d268c | Jun Nakajima | (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)); |
136 | 432d268c | Jun Nakajima | |
137 | 432d268c | Jun Nakajima | size = mapcache->nr_buckets * sizeof (MapCacheEntry);
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138 | 432d268c | Jun Nakajima | size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1); |
139 | e41d7c69 | Jan Kiszka | DPRINTF("%s, nr_buckets = %lx size %lu\n", __func__,
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140 | e41d7c69 | Jan Kiszka | mapcache->nr_buckets, size); |
141 | 7267c094 | Anthony Liguori | mapcache->entry = g_malloc0(size); |
142 | 432d268c | Jun Nakajima | } |
143 | 432d268c | Jun Nakajima | |
144 | e41d7c69 | Jan Kiszka | static void xen_remap_bucket(MapCacheEntry *entry, |
145 | a8170e5e | Avi Kivity | hwaddr size, |
146 | a8170e5e | Avi Kivity | hwaddr address_index) |
147 | 432d268c | Jun Nakajima | { |
148 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
149 | 432d268c | Jun Nakajima | xen_pfn_t *pfns; |
150 | 432d268c | Jun Nakajima | int *err;
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151 | ea6c5f8f | John Baboval | unsigned int i; |
152 | a8170e5e | Avi Kivity | hwaddr nb_pfn = size >> XC_PAGE_SHIFT; |
153 | 432d268c | Jun Nakajima | |
154 | e41d7c69 | Jan Kiszka | trace_xen_remap_bucket(address_index); |
155 | 432d268c | Jun Nakajima | |
156 | 7267c094 | Anthony Liguori | pfns = g_malloc0(nb_pfn * sizeof (xen_pfn_t));
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157 | 7267c094 | Anthony Liguori | err = g_malloc0(nb_pfn * sizeof (int)); |
158 | 432d268c | Jun Nakajima | |
159 | 432d268c | Jun Nakajima | if (entry->vaddr_base != NULL) { |
160 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
161 | 432d268c | Jun Nakajima | perror("unmap fails");
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162 | 432d268c | Jun Nakajima | exit(-1);
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163 | 432d268c | Jun Nakajima | } |
164 | 432d268c | Jun Nakajima | } |
165 | c13390cd | Stefano Stabellini | if (entry->valid_mapping != NULL) { |
166 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
167 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
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168 | c13390cd | Stefano Stabellini | } |
169 | 432d268c | Jun Nakajima | |
170 | 432d268c | Jun Nakajima | for (i = 0; i < nb_pfn; i++) { |
171 | 432d268c | Jun Nakajima | pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT-XC_PAGE_SHIFT)) + i; |
172 | 432d268c | Jun Nakajima | } |
173 | 432d268c | Jun Nakajima | |
174 | 432d268c | Jun Nakajima | vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE, |
175 | 432d268c | Jun Nakajima | pfns, err, nb_pfn); |
176 | 432d268c | Jun Nakajima | if (vaddr_base == NULL) { |
177 | 432d268c | Jun Nakajima | perror("xc_map_foreign_bulk");
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178 | 432d268c | Jun Nakajima | exit(-1);
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179 | 432d268c | Jun Nakajima | } |
180 | 432d268c | Jun Nakajima | |
181 | 432d268c | Jun Nakajima | entry->vaddr_base = vaddr_base; |
182 | 432d268c | Jun Nakajima | entry->paddr_index = address_index; |
183 | c13390cd | Stefano Stabellini | entry->size = size; |
184 | 7267c094 | Anthony Liguori | entry->valid_mapping = (unsigned long *) g_malloc0(sizeof(unsigned long) * |
185 | c13390cd | Stefano Stabellini | BITS_TO_LONGS(size >> XC_PAGE_SHIFT)); |
186 | 432d268c | Jun Nakajima | |
187 | ea6c5f8f | John Baboval | bitmap_zero(entry->valid_mapping, nb_pfn); |
188 | ea6c5f8f | John Baboval | for (i = 0; i < nb_pfn; i++) { |
189 | ea6c5f8f | John Baboval | if (!err[i]) {
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190 | ea6c5f8f | John Baboval | bitmap_set(entry->valid_mapping, i, 1);
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191 | 432d268c | Jun Nakajima | } |
192 | 432d268c | Jun Nakajima | } |
193 | 432d268c | Jun Nakajima | |
194 | 7267c094 | Anthony Liguori | g_free(pfns); |
195 | 7267c094 | Anthony Liguori | g_free(err); |
196 | 432d268c | Jun Nakajima | } |
197 | 432d268c | Jun Nakajima | |
198 | a8170e5e | Avi Kivity | uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size, |
199 | e41d7c69 | Jan Kiszka | uint8_t lock) |
200 | 432d268c | Jun Nakajima | { |
201 | 432d268c | Jun Nakajima | MapCacheEntry *entry, *pentry = NULL;
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202 | a8170e5e | Avi Kivity | hwaddr address_index; |
203 | a8170e5e | Avi Kivity | hwaddr address_offset; |
204 | a8170e5e | Avi Kivity | hwaddr __size = size; |
205 | cd1ba7de | Anthony PERARD | bool translated = false; |
206 | cd1ba7de | Anthony PERARD | |
207 | cd1ba7de | Anthony PERARD | tryagain:
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208 | cd1ba7de | Anthony PERARD | address_index = phys_addr >> MCACHE_BUCKET_SHIFT; |
209 | cd1ba7de | Anthony PERARD | address_offset = phys_addr & (MCACHE_BUCKET_SIZE - 1);
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210 | 432d268c | Jun Nakajima | |
211 | e41d7c69 | Jan Kiszka | trace_xen_map_cache(phys_addr); |
212 | 432d268c | Jun Nakajima | |
213 | c13390cd | Stefano Stabellini | if (address_index == mapcache->last_address_index && !lock && !__size) {
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214 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
215 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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216 | 432d268c | Jun Nakajima | } |
217 | 432d268c | Jun Nakajima | |
218 | c13390cd | Stefano Stabellini | /* size is always a multiple of MCACHE_BUCKET_SIZE */
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219 | 09ab48ee | Anthony PERARD | if (size) {
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220 | 09ab48ee | Anthony PERARD | __size = size + address_offset; |
221 | 09ab48ee | Anthony PERARD | if (__size % MCACHE_BUCKET_SIZE) {
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222 | 09ab48ee | Anthony PERARD | __size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE); |
223 | 09ab48ee | Anthony PERARD | } |
224 | 09ab48ee | Anthony PERARD | } else {
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225 | c13390cd | Stefano Stabellini | __size = MCACHE_BUCKET_SIZE; |
226 | 09ab48ee | Anthony PERARD | } |
227 | c13390cd | Stefano Stabellini | |
228 | 432d268c | Jun Nakajima | entry = &mapcache->entry[address_index % mapcache->nr_buckets]; |
229 | 432d268c | Jun Nakajima | |
230 | c13390cd | Stefano Stabellini | while (entry && entry->lock && entry->vaddr_base &&
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231 | c13390cd | Stefano Stabellini | (entry->paddr_index != address_index || entry->size != __size || |
232 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
233 | c13390cd | Stefano Stabellini | entry->valid_mapping))) { |
234 | 432d268c | Jun Nakajima | pentry = entry; |
235 | 432d268c | Jun Nakajima | entry = entry->next; |
236 | 432d268c | Jun Nakajima | } |
237 | 432d268c | Jun Nakajima | if (!entry) {
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238 | 7267c094 | Anthony Liguori | entry = g_malloc0(sizeof (MapCacheEntry));
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239 | 432d268c | Jun Nakajima | pentry->next = entry; |
240 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
241 | 432d268c | Jun Nakajima | } else if (!entry->lock) { |
242 | 432d268c | Jun Nakajima | if (!entry->vaddr_base || entry->paddr_index != address_index ||
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243 | c13390cd | Stefano Stabellini | entry->size != __size || |
244 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
245 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
246 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
247 | 432d268c | Jun Nakajima | } |
248 | 432d268c | Jun Nakajima | } |
249 | 432d268c | Jun Nakajima | |
250 | c13390cd | Stefano Stabellini | if(!test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT,
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251 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
252 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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253 | cd1ba7de | Anthony PERARD | if (!translated && mapcache->phys_offset_to_gaddr) {
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254 | cd1ba7de | Anthony PERARD | phys_addr = mapcache->phys_offset_to_gaddr(phys_addr, size, mapcache->opaque); |
255 | cd1ba7de | Anthony PERARD | translated = true;
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256 | cd1ba7de | Anthony PERARD | goto tryagain;
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257 | cd1ba7de | Anthony PERARD | } |
258 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(NULL);
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259 | 432d268c | Jun Nakajima | return NULL; |
260 | 432d268c | Jun Nakajima | } |
261 | 432d268c | Jun Nakajima | |
262 | 432d268c | Jun Nakajima | mapcache->last_address_index = address_index; |
263 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = entry->vaddr_base; |
264 | 432d268c | Jun Nakajima | if (lock) {
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265 | 7267c094 | Anthony Liguori | MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
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266 | 432d268c | Jun Nakajima | entry->lock++; |
267 | 432d268c | Jun Nakajima | reventry->vaddr_req = mapcache->last_address_vaddr + address_offset; |
268 | 432d268c | Jun Nakajima | reventry->paddr_index = mapcache->last_address_index; |
269 | c13390cd | Stefano Stabellini | reventry->size = entry->size; |
270 | 432d268c | Jun Nakajima | QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next); |
271 | 432d268c | Jun Nakajima | } |
272 | 432d268c | Jun Nakajima | |
273 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
274 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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275 | 432d268c | Jun Nakajima | } |
276 | 432d268c | Jun Nakajima | |
277 | e41d7c69 | Jan Kiszka | ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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278 | 432d268c | Jun Nakajima | { |
279 | ecf169b7 | Stefan Berger | MapCacheEntry *entry = NULL;
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280 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
281 | a8170e5e | Avi Kivity | hwaddr paddr_index; |
282 | a8170e5e | Avi Kivity | hwaddr size; |
283 | 432d268c | Jun Nakajima | int found = 0; |
284 | 432d268c | Jun Nakajima | |
285 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
286 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == ptr) {
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287 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
288 | c13390cd | Stefano Stabellini | size = reventry->size; |
289 | 432d268c | Jun Nakajima | found = 1;
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290 | 432d268c | Jun Nakajima | break;
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291 | 432d268c | Jun Nakajima | } |
292 | 432d268c | Jun Nakajima | } |
293 | 432d268c | Jun Nakajima | if (!found) {
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294 | e41d7c69 | Jan Kiszka | fprintf(stderr, "%s, could not find %p\n", __func__, ptr);
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295 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
296 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, |
297 | 432d268c | Jun Nakajima | reventry->vaddr_req); |
298 | 432d268c | Jun Nakajima | } |
299 | 432d268c | Jun Nakajima | abort(); |
300 | 432d268c | Jun Nakajima | return 0; |
301 | 432d268c | Jun Nakajima | } |
302 | 432d268c | Jun Nakajima | |
303 | c13390cd | Stefano Stabellini | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
304 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
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305 | c13390cd | Stefano Stabellini | entry = entry->next; |
306 | c13390cd | Stefano Stabellini | } |
307 | c13390cd | Stefano Stabellini | if (!entry) {
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308 | c13390cd | Stefano Stabellini | DPRINTF("Trying to find address %p that is not in the mapcache!\n", ptr);
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309 | c13390cd | Stefano Stabellini | return 0; |
310 | c13390cd | Stefano Stabellini | } |
311 | c13390cd | Stefano Stabellini | return (reventry->paddr_index << MCACHE_BUCKET_SHIFT) +
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312 | c13390cd | Stefano Stabellini | ((unsigned long) ptr - (unsigned long) entry->vaddr_base); |
313 | 432d268c | Jun Nakajima | } |
314 | 432d268c | Jun Nakajima | |
315 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache_entry(uint8_t *buffer)
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316 | 432d268c | Jun Nakajima | { |
317 | 432d268c | Jun Nakajima | MapCacheEntry *entry = NULL, *pentry = NULL; |
318 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
319 | a8170e5e | Avi Kivity | hwaddr paddr_index; |
320 | a8170e5e | Avi Kivity | hwaddr size; |
321 | 432d268c | Jun Nakajima | int found = 0; |
322 | 432d268c | Jun Nakajima | |
323 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
324 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == buffer) {
|
325 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
326 | c13390cd | Stefano Stabellini | size = reventry->size; |
327 | 432d268c | Jun Nakajima | found = 1;
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328 | 432d268c | Jun Nakajima | break;
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329 | 432d268c | Jun Nakajima | } |
330 | 432d268c | Jun Nakajima | } |
331 | 432d268c | Jun Nakajima | if (!found) {
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332 | e41d7c69 | Jan Kiszka | DPRINTF("%s, could not find %p\n", __func__, buffer);
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333 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
334 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req); |
335 | 432d268c | Jun Nakajima | } |
336 | 432d268c | Jun Nakajima | return;
|
337 | 432d268c | Jun Nakajima | } |
338 | 432d268c | Jun Nakajima | QTAILQ_REMOVE(&mapcache->locked_entries, reventry, next); |
339 | 7267c094 | Anthony Liguori | g_free(reventry); |
340 | 432d268c | Jun Nakajima | |
341 | 27b7652e | Frediano Ziglio | if (mapcache->last_address_index == paddr_index) {
|
342 | 27b7652e | Frediano Ziglio | mapcache->last_address_index = -1;
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343 | 27b7652e | Frediano Ziglio | mapcache->last_address_vaddr = NULL;
|
344 | 27b7652e | Frediano Ziglio | } |
345 | 27b7652e | Frediano Ziglio | |
346 | 432d268c | Jun Nakajima | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
347 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
|
348 | 432d268c | Jun Nakajima | pentry = entry; |
349 | 432d268c | Jun Nakajima | entry = entry->next; |
350 | 432d268c | Jun Nakajima | } |
351 | 432d268c | Jun Nakajima | if (!entry) {
|
352 | 432d268c | Jun Nakajima | DPRINTF("Trying to unmap address %p that is not in the mapcache!\n", buffer);
|
353 | 432d268c | Jun Nakajima | return;
|
354 | 432d268c | Jun Nakajima | } |
355 | 432d268c | Jun Nakajima | entry->lock--; |
356 | 432d268c | Jun Nakajima | if (entry->lock > 0 || pentry == NULL) { |
357 | 432d268c | Jun Nakajima | return;
|
358 | 432d268c | Jun Nakajima | } |
359 | 432d268c | Jun Nakajima | |
360 | 432d268c | Jun Nakajima | pentry->next = entry->next; |
361 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
362 | 432d268c | Jun Nakajima | perror("unmap fails");
|
363 | 432d268c | Jun Nakajima | exit(-1);
|
364 | 432d268c | Jun Nakajima | } |
365 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
366 | 7267c094 | Anthony Liguori | g_free(entry); |
367 | 432d268c | Jun Nakajima | } |
368 | 432d268c | Jun Nakajima | |
369 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache(void) |
370 | 432d268c | Jun Nakajima | { |
371 | 432d268c | Jun Nakajima | unsigned long i; |
372 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
373 | 432d268c | Jun Nakajima | |
374 | 432d268c | Jun Nakajima | /* Flush pending AIO before destroying the mapcache */
|
375 | 922453bc | Stefan Hajnoczi | bdrv_drain_all(); |
376 | 432d268c | Jun Nakajima | |
377 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
378 | 432d268c | Jun Nakajima | DPRINTF("There should be no locked mappings at this time, "
|
379 | 432d268c | Jun Nakajima | "but "TARGET_FMT_plx" -> %p is present\n", |
380 | 432d268c | Jun Nakajima | reventry->paddr_index, reventry->vaddr_req); |
381 | 432d268c | Jun Nakajima | } |
382 | 432d268c | Jun Nakajima | |
383 | 432d268c | Jun Nakajima | mapcache_lock(); |
384 | 432d268c | Jun Nakajima | |
385 | 432d268c | Jun Nakajima | for (i = 0; i < mapcache->nr_buckets; i++) { |
386 | 432d268c | Jun Nakajima | MapCacheEntry *entry = &mapcache->entry[i]; |
387 | 432d268c | Jun Nakajima | |
388 | 432d268c | Jun Nakajima | if (entry->vaddr_base == NULL) { |
389 | 432d268c | Jun Nakajima | continue;
|
390 | 432d268c | Jun Nakajima | } |
391 | 852a7cec | Julien Grall | if (entry->lock > 0) { |
392 | 852a7cec | Julien Grall | continue;
|
393 | 852a7cec | Julien Grall | } |
394 | 432d268c | Jun Nakajima | |
395 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
396 | 432d268c | Jun Nakajima | perror("unmap fails");
|
397 | 432d268c | Jun Nakajima | exit(-1);
|
398 | 432d268c | Jun Nakajima | } |
399 | 432d268c | Jun Nakajima | |
400 | 432d268c | Jun Nakajima | entry->paddr_index = 0;
|
401 | 432d268c | Jun Nakajima | entry->vaddr_base = NULL;
|
402 | c13390cd | Stefano Stabellini | entry->size = 0;
|
403 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
404 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
|
405 | 432d268c | Jun Nakajima | } |
406 | 432d268c | Jun Nakajima | |
407 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
|
408 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = NULL;
|
409 | 432d268c | Jun Nakajima | |
410 | 432d268c | Jun Nakajima | mapcache_unlock(); |
411 | 432d268c | Jun Nakajima | } |