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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 | 432d268c | Jun Nakajima | target_phys_addr_t 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 | c13390cd | Stefano Stabellini | target_phys_addr_t 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 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
67 | c13390cd | Stefano Stabellini | target_phys_addr_t 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 | 432d268c | Jun Nakajima | target_phys_addr_t 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 | 432d268c | Jun Nakajima | } MapCache; |
82 | 432d268c | Jun Nakajima | |
83 | 432d268c | Jun Nakajima | static MapCache *mapcache;
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84 | 432d268c | Jun Nakajima | |
85 | c13390cd | Stefano Stabellini | static inline int test_bits(int nr, int size, const unsigned long *addr) |
86 | c13390cd | Stefano Stabellini | { |
87 | c13390cd | Stefano Stabellini | unsigned long res = find_next_zero_bit(addr, size + nr, nr); |
88 | c13390cd | Stefano Stabellini | if (res >= nr + size)
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89 | c13390cd | Stefano Stabellini | return 1; |
90 | c13390cd | Stefano Stabellini | else
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91 | c13390cd | Stefano Stabellini | return 0; |
92 | c13390cd | Stefano Stabellini | } |
93 | c13390cd | Stefano Stabellini | |
94 | e41d7c69 | Jan Kiszka | void xen_map_cache_init(void) |
95 | 432d268c | Jun Nakajima | { |
96 | 432d268c | Jun Nakajima | unsigned long size; |
97 | 432d268c | Jun Nakajima | struct rlimit rlimit_as;
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98 | 432d268c | Jun Nakajima | |
99 | 7267c094 | Anthony Liguori | mapcache = g_malloc0(sizeof (MapCache));
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100 | 432d268c | Jun Nakajima | |
101 | 432d268c | Jun Nakajima | QTAILQ_INIT(&mapcache->locked_entries); |
102 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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103 | 432d268c | Jun Nakajima | |
104 | 56c119e5 | Anthony PERARD | if (geteuid() == 0) { |
105 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_cur = RLIM_INFINITY; |
106 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_max = RLIM_INFINITY; |
107 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = MCACHE_MAX_SIZE; |
108 | ea6c5f8f | John Baboval | } else {
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109 | 56c119e5 | Anthony PERARD | getrlimit(RLIMIT_AS, &rlimit_as); |
110 | 56c119e5 | Anthony PERARD | rlimit_as.rlim_cur = rlimit_as.rlim_max; |
111 | 56c119e5 | Anthony PERARD | |
112 | 56c119e5 | Anthony PERARD | if (rlimit_as.rlim_max != RLIM_INFINITY) {
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113 | 56c119e5 | Anthony PERARD | fprintf(stderr, "Warning: QEMU's maximum size of virtual"
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114 | 56c119e5 | Anthony PERARD | " memory is not infinity.\n");
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115 | 56c119e5 | Anthony PERARD | } |
116 | 56c119e5 | Anthony PERARD | if (rlimit_as.rlim_max < MCACHE_MAX_SIZE + NON_MCACHE_MEMORY_SIZE) {
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117 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = rlimit_as.rlim_max - |
118 | 56c119e5 | Anthony PERARD | NON_MCACHE_MEMORY_SIZE; |
119 | 56c119e5 | Anthony PERARD | } else {
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120 | 56c119e5 | Anthony PERARD | mapcache->max_mcache_size = MCACHE_MAX_SIZE; |
121 | 56c119e5 | Anthony PERARD | } |
122 | ea6c5f8f | John Baboval | } |
123 | ea6c5f8f | John Baboval | |
124 | 432d268c | Jun Nakajima | setrlimit(RLIMIT_AS, &rlimit_as); |
125 | 432d268c | Jun Nakajima | |
126 | 432d268c | Jun Nakajima | mapcache->nr_buckets = |
127 | 432d268c | Jun Nakajima | (((mapcache->max_mcache_size >> XC_PAGE_SHIFT) + |
128 | 432d268c | Jun Nakajima | (1UL << (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)) - 1) >> |
129 | 432d268c | Jun Nakajima | (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)); |
130 | 432d268c | Jun Nakajima | |
131 | 432d268c | Jun Nakajima | size = mapcache->nr_buckets * sizeof (MapCacheEntry);
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132 | 432d268c | Jun Nakajima | size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1); |
133 | e41d7c69 | Jan Kiszka | DPRINTF("%s, nr_buckets = %lx size %lu\n", __func__,
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134 | e41d7c69 | Jan Kiszka | mapcache->nr_buckets, size); |
135 | 7267c094 | Anthony Liguori | mapcache->entry = g_malloc0(size); |
136 | 432d268c | Jun Nakajima | } |
137 | 432d268c | Jun Nakajima | |
138 | e41d7c69 | Jan Kiszka | static void xen_remap_bucket(MapCacheEntry *entry, |
139 | e41d7c69 | Jan Kiszka | target_phys_addr_t size, |
140 | e41d7c69 | Jan Kiszka | target_phys_addr_t address_index) |
141 | 432d268c | Jun Nakajima | { |
142 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
143 | 432d268c | Jun Nakajima | xen_pfn_t *pfns; |
144 | 432d268c | Jun Nakajima | int *err;
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145 | ea6c5f8f | John Baboval | unsigned int i; |
146 | 432d268c | Jun Nakajima | target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; |
147 | 432d268c | Jun Nakajima | |
148 | e41d7c69 | Jan Kiszka | trace_xen_remap_bucket(address_index); |
149 | 432d268c | Jun Nakajima | |
150 | 7267c094 | Anthony Liguori | pfns = g_malloc0(nb_pfn * sizeof (xen_pfn_t));
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151 | 7267c094 | Anthony Liguori | err = g_malloc0(nb_pfn * sizeof (int)); |
152 | 432d268c | Jun Nakajima | |
153 | 432d268c | Jun Nakajima | if (entry->vaddr_base != NULL) { |
154 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
155 | 432d268c | Jun Nakajima | perror("unmap fails");
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156 | 432d268c | Jun Nakajima | exit(-1);
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157 | 432d268c | Jun Nakajima | } |
158 | 432d268c | Jun Nakajima | } |
159 | c13390cd | Stefano Stabellini | if (entry->valid_mapping != NULL) { |
160 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
161 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
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162 | c13390cd | Stefano Stabellini | } |
163 | 432d268c | Jun Nakajima | |
164 | 432d268c | Jun Nakajima | for (i = 0; i < nb_pfn; i++) { |
165 | 432d268c | Jun Nakajima | pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT-XC_PAGE_SHIFT)) + i; |
166 | 432d268c | Jun Nakajima | } |
167 | 432d268c | Jun Nakajima | |
168 | 432d268c | Jun Nakajima | vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE, |
169 | 432d268c | Jun Nakajima | pfns, err, nb_pfn); |
170 | 432d268c | Jun Nakajima | if (vaddr_base == NULL) { |
171 | 432d268c | Jun Nakajima | perror("xc_map_foreign_bulk");
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172 | 432d268c | Jun Nakajima | exit(-1);
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173 | 432d268c | Jun Nakajima | } |
174 | 432d268c | Jun Nakajima | |
175 | 432d268c | Jun Nakajima | entry->vaddr_base = vaddr_base; |
176 | 432d268c | Jun Nakajima | entry->paddr_index = address_index; |
177 | c13390cd | Stefano Stabellini | entry->size = size; |
178 | 7267c094 | Anthony Liguori | entry->valid_mapping = (unsigned long *) g_malloc0(sizeof(unsigned long) * |
179 | c13390cd | Stefano Stabellini | BITS_TO_LONGS(size >> XC_PAGE_SHIFT)); |
180 | 432d268c | Jun Nakajima | |
181 | ea6c5f8f | John Baboval | bitmap_zero(entry->valid_mapping, nb_pfn); |
182 | ea6c5f8f | John Baboval | for (i = 0; i < nb_pfn; i++) { |
183 | ea6c5f8f | John Baboval | if (!err[i]) {
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184 | ea6c5f8f | John Baboval | bitmap_set(entry->valid_mapping, i, 1);
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185 | 432d268c | Jun Nakajima | } |
186 | 432d268c | Jun Nakajima | } |
187 | 432d268c | Jun Nakajima | |
188 | 7267c094 | Anthony Liguori | g_free(pfns); |
189 | 7267c094 | Anthony Liguori | g_free(err); |
190 | 432d268c | Jun Nakajima | } |
191 | 432d268c | Jun Nakajima | |
192 | e41d7c69 | Jan Kiszka | uint8_t *xen_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, |
193 | e41d7c69 | Jan Kiszka | uint8_t lock) |
194 | 432d268c | Jun Nakajima | { |
195 | 432d268c | Jun Nakajima | MapCacheEntry *entry, *pentry = NULL;
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196 | 432d268c | Jun Nakajima | target_phys_addr_t address_index = phys_addr >> MCACHE_BUCKET_SHIFT; |
197 | 432d268c | Jun Nakajima | target_phys_addr_t address_offset = phys_addr & (MCACHE_BUCKET_SIZE - 1);
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198 | c13390cd | Stefano Stabellini | target_phys_addr_t __size = size; |
199 | 432d268c | Jun Nakajima | |
200 | e41d7c69 | Jan Kiszka | trace_xen_map_cache(phys_addr); |
201 | 432d268c | Jun Nakajima | |
202 | c13390cd | Stefano Stabellini | if (address_index == mapcache->last_address_index && !lock && !__size) {
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203 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
204 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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205 | 432d268c | Jun Nakajima | } |
206 | 432d268c | Jun Nakajima | |
207 | c13390cd | Stefano Stabellini | /* size is always a multiple of MCACHE_BUCKET_SIZE */
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208 | c13390cd | Stefano Stabellini | if ((address_offset + (__size % MCACHE_BUCKET_SIZE)) > MCACHE_BUCKET_SIZE)
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209 | c13390cd | Stefano Stabellini | __size += MCACHE_BUCKET_SIZE; |
210 | c13390cd | Stefano Stabellini | if (__size % MCACHE_BUCKET_SIZE)
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211 | c13390cd | Stefano Stabellini | __size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE); |
212 | c13390cd | Stefano Stabellini | if (!__size)
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213 | c13390cd | Stefano Stabellini | __size = MCACHE_BUCKET_SIZE; |
214 | c13390cd | Stefano Stabellini | |
215 | 432d268c | Jun Nakajima | entry = &mapcache->entry[address_index % mapcache->nr_buckets]; |
216 | 432d268c | Jun Nakajima | |
217 | c13390cd | Stefano Stabellini | while (entry && entry->lock && entry->vaddr_base &&
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218 | c13390cd | Stefano Stabellini | (entry->paddr_index != address_index || entry->size != __size || |
219 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
220 | c13390cd | Stefano Stabellini | entry->valid_mapping))) { |
221 | 432d268c | Jun Nakajima | pentry = entry; |
222 | 432d268c | Jun Nakajima | entry = entry->next; |
223 | 432d268c | Jun Nakajima | } |
224 | 432d268c | Jun Nakajima | if (!entry) {
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225 | 7267c094 | Anthony Liguori | entry = g_malloc0(sizeof (MapCacheEntry));
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226 | 432d268c | Jun Nakajima | pentry->next = entry; |
227 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
228 | 432d268c | Jun Nakajima | } else if (!entry->lock) { |
229 | 432d268c | Jun Nakajima | if (!entry->vaddr_base || entry->paddr_index != address_index ||
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230 | c13390cd | Stefano Stabellini | entry->size != __size || |
231 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
232 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
233 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
234 | 432d268c | Jun Nakajima | } |
235 | 432d268c | Jun Nakajima | } |
236 | 432d268c | Jun Nakajima | |
237 | c13390cd | Stefano Stabellini | if(!test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT,
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238 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
239 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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240 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(NULL);
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241 | 432d268c | Jun Nakajima | return NULL; |
242 | 432d268c | Jun Nakajima | } |
243 | 432d268c | Jun Nakajima | |
244 | 432d268c | Jun Nakajima | mapcache->last_address_index = address_index; |
245 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = entry->vaddr_base; |
246 | 432d268c | Jun Nakajima | if (lock) {
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247 | 7267c094 | Anthony Liguori | MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
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248 | 432d268c | Jun Nakajima | entry->lock++; |
249 | 432d268c | Jun Nakajima | reventry->vaddr_req = mapcache->last_address_vaddr + address_offset; |
250 | 432d268c | Jun Nakajima | reventry->paddr_index = mapcache->last_address_index; |
251 | c13390cd | Stefano Stabellini | reventry->size = entry->size; |
252 | 432d268c | Jun Nakajima | QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next); |
253 | 432d268c | Jun Nakajima | } |
254 | 432d268c | Jun Nakajima | |
255 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
256 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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257 | 432d268c | Jun Nakajima | } |
258 | 432d268c | Jun Nakajima | |
259 | e41d7c69 | Jan Kiszka | ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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260 | 432d268c | Jun Nakajima | { |
261 | ecf169b7 | Stefan Berger | MapCacheEntry *entry = NULL;
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262 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
263 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
264 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
265 | 432d268c | Jun Nakajima | int found = 0; |
266 | 432d268c | Jun Nakajima | |
267 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
268 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == ptr) {
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269 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
270 | c13390cd | Stefano Stabellini | size = reventry->size; |
271 | 432d268c | Jun Nakajima | found = 1;
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272 | 432d268c | Jun Nakajima | break;
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273 | 432d268c | Jun Nakajima | } |
274 | 432d268c | Jun Nakajima | } |
275 | 432d268c | Jun Nakajima | if (!found) {
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276 | e41d7c69 | Jan Kiszka | fprintf(stderr, "%s, could not find %p\n", __func__, ptr);
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277 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
278 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, |
279 | 432d268c | Jun Nakajima | reventry->vaddr_req); |
280 | 432d268c | Jun Nakajima | } |
281 | 432d268c | Jun Nakajima | abort(); |
282 | 432d268c | Jun Nakajima | return 0; |
283 | 432d268c | Jun Nakajima | } |
284 | 432d268c | Jun Nakajima | |
285 | c13390cd | Stefano Stabellini | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
286 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
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287 | c13390cd | Stefano Stabellini | entry = entry->next; |
288 | c13390cd | Stefano Stabellini | } |
289 | c13390cd | Stefano Stabellini | if (!entry) {
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290 | c13390cd | Stefano Stabellini | DPRINTF("Trying to find address %p that is not in the mapcache!\n", ptr);
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291 | c13390cd | Stefano Stabellini | return 0; |
292 | c13390cd | Stefano Stabellini | } |
293 | c13390cd | Stefano Stabellini | return (reventry->paddr_index << MCACHE_BUCKET_SHIFT) +
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294 | c13390cd | Stefano Stabellini | ((unsigned long) ptr - (unsigned long) entry->vaddr_base); |
295 | 432d268c | Jun Nakajima | } |
296 | 432d268c | Jun Nakajima | |
297 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache_entry(uint8_t *buffer)
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298 | 432d268c | Jun Nakajima | { |
299 | 432d268c | Jun Nakajima | MapCacheEntry *entry = NULL, *pentry = NULL; |
300 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
301 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
302 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
303 | 432d268c | Jun Nakajima | int found = 0; |
304 | 432d268c | Jun Nakajima | |
305 | 432d268c | Jun Nakajima | if (mapcache->last_address_vaddr == buffer) {
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306 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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307 | 432d268c | Jun Nakajima | } |
308 | 432d268c | Jun Nakajima | |
309 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
310 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == buffer) {
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311 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
312 | c13390cd | Stefano Stabellini | size = reventry->size; |
313 | 432d268c | Jun Nakajima | found = 1;
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314 | 432d268c | Jun Nakajima | break;
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315 | 432d268c | Jun Nakajima | } |
316 | 432d268c | Jun Nakajima | } |
317 | 432d268c | Jun Nakajima | if (!found) {
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318 | e41d7c69 | Jan Kiszka | DPRINTF("%s, could not find %p\n", __func__, buffer);
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319 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
320 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req); |
321 | 432d268c | Jun Nakajima | } |
322 | 432d268c | Jun Nakajima | return;
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323 | 432d268c | Jun Nakajima | } |
324 | 432d268c | Jun Nakajima | QTAILQ_REMOVE(&mapcache->locked_entries, reventry, next); |
325 | 7267c094 | Anthony Liguori | g_free(reventry); |
326 | 432d268c | Jun Nakajima | |
327 | 432d268c | Jun Nakajima | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
328 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
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329 | 432d268c | Jun Nakajima | pentry = entry; |
330 | 432d268c | Jun Nakajima | entry = entry->next; |
331 | 432d268c | Jun Nakajima | } |
332 | 432d268c | Jun Nakajima | if (!entry) {
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333 | 432d268c | Jun Nakajima | DPRINTF("Trying to unmap address %p that is not in the mapcache!\n", buffer);
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334 | 432d268c | Jun Nakajima | return;
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335 | 432d268c | Jun Nakajima | } |
336 | 432d268c | Jun Nakajima | entry->lock--; |
337 | 432d268c | Jun Nakajima | if (entry->lock > 0 || pentry == NULL) { |
338 | 432d268c | Jun Nakajima | return;
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339 | 432d268c | Jun Nakajima | } |
340 | 432d268c | Jun Nakajima | |
341 | 432d268c | Jun Nakajima | pentry->next = entry->next; |
342 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
343 | 432d268c | Jun Nakajima | perror("unmap fails");
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344 | 432d268c | Jun Nakajima | exit(-1);
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345 | 432d268c | Jun Nakajima | } |
346 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
347 | 7267c094 | Anthony Liguori | g_free(entry); |
348 | 432d268c | Jun Nakajima | } |
349 | 432d268c | Jun Nakajima | |
350 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache(void) |
351 | 432d268c | Jun Nakajima | { |
352 | 432d268c | Jun Nakajima | unsigned long i; |
353 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
354 | 432d268c | Jun Nakajima | |
355 | 432d268c | Jun Nakajima | /* Flush pending AIO before destroying the mapcache */
|
356 | 922453bc | Stefan Hajnoczi | bdrv_drain_all(); |
357 | 432d268c | Jun Nakajima | |
358 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
359 | 432d268c | Jun Nakajima | DPRINTF("There should be no locked mappings at this time, "
|
360 | 432d268c | Jun Nakajima | "but "TARGET_FMT_plx" -> %p is present\n", |
361 | 432d268c | Jun Nakajima | reventry->paddr_index, reventry->vaddr_req); |
362 | 432d268c | Jun Nakajima | } |
363 | 432d268c | Jun Nakajima | |
364 | 432d268c | Jun Nakajima | mapcache_lock(); |
365 | 432d268c | Jun Nakajima | |
366 | 432d268c | Jun Nakajima | for (i = 0; i < mapcache->nr_buckets; i++) { |
367 | 432d268c | Jun Nakajima | MapCacheEntry *entry = &mapcache->entry[i]; |
368 | 432d268c | Jun Nakajima | |
369 | 432d268c | Jun Nakajima | if (entry->vaddr_base == NULL) { |
370 | 432d268c | Jun Nakajima | continue;
|
371 | 432d268c | Jun Nakajima | } |
372 | 432d268c | Jun Nakajima | |
373 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
374 | 432d268c | Jun Nakajima | perror("unmap fails");
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375 | 432d268c | Jun Nakajima | exit(-1);
|
376 | 432d268c | Jun Nakajima | } |
377 | 432d268c | Jun Nakajima | |
378 | 432d268c | Jun Nakajima | entry->paddr_index = 0;
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379 | 432d268c | Jun Nakajima | entry->vaddr_base = NULL;
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380 | c13390cd | Stefano Stabellini | entry->size = 0;
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381 | 7267c094 | Anthony Liguori | g_free(entry->valid_mapping); |
382 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
|
383 | 432d268c | Jun Nakajima | } |
384 | 432d268c | Jun Nakajima | |
385 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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386 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = NULL;
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387 | 432d268c | Jun Nakajima | |
388 | 432d268c | Jun Nakajima | mapcache_unlock(); |
389 | 432d268c | Jun Nakajima | } |