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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 | e41d7c69 | Jan Kiszka | #define mapcache_lock() ((void)0) |
44 | e41d7c69 | Jan Kiszka | #define mapcache_unlock() ((void)0) |
45 | e41d7c69 | Jan Kiszka | |
46 | 432d268c | Jun Nakajima | typedef struct MapCacheEntry { |
47 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
48 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
49 | c13390cd | Stefano Stabellini | unsigned long *valid_mapping; |
50 | 432d268c | Jun Nakajima | uint8_t lock; |
51 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
52 | 432d268c | Jun Nakajima | struct MapCacheEntry *next;
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53 | 432d268c | Jun Nakajima | } MapCacheEntry; |
54 | 432d268c | Jun Nakajima | |
55 | 432d268c | Jun Nakajima | typedef struct MapCacheRev { |
56 | 432d268c | Jun Nakajima | uint8_t *vaddr_req; |
57 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
58 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
59 | 432d268c | Jun Nakajima | QTAILQ_ENTRY(MapCacheRev) next; |
60 | 432d268c | Jun Nakajima | } MapCacheRev; |
61 | 432d268c | Jun Nakajima | |
62 | 432d268c | Jun Nakajima | typedef struct MapCache { |
63 | 432d268c | Jun Nakajima | MapCacheEntry *entry; |
64 | 432d268c | Jun Nakajima | unsigned long nr_buckets; |
65 | 432d268c | Jun Nakajima | QTAILQ_HEAD(map_cache_head, MapCacheRev) locked_entries; |
66 | 432d268c | Jun Nakajima | |
67 | 432d268c | Jun Nakajima | /* For most cases (>99.9%), the page address is the same. */
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68 | 432d268c | Jun Nakajima | target_phys_addr_t last_address_index; |
69 | 432d268c | Jun Nakajima | uint8_t *last_address_vaddr; |
70 | 432d268c | Jun Nakajima | unsigned long max_mcache_size; |
71 | 432d268c | Jun Nakajima | unsigned int mcache_bucket_shift; |
72 | 432d268c | Jun Nakajima | } MapCache; |
73 | 432d268c | Jun Nakajima | |
74 | 432d268c | Jun Nakajima | static MapCache *mapcache;
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75 | 432d268c | Jun Nakajima | |
76 | c13390cd | Stefano Stabellini | static inline int test_bits(int nr, int size, const unsigned long *addr) |
77 | c13390cd | Stefano Stabellini | { |
78 | c13390cd | Stefano Stabellini | unsigned long res = find_next_zero_bit(addr, size + nr, nr); |
79 | c13390cd | Stefano Stabellini | if (res >= nr + size)
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80 | c13390cd | Stefano Stabellini | return 1; |
81 | c13390cd | Stefano Stabellini | else
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82 | c13390cd | Stefano Stabellini | return 0; |
83 | c13390cd | Stefano Stabellini | } |
84 | c13390cd | Stefano Stabellini | |
85 | e41d7c69 | Jan Kiszka | void xen_map_cache_init(void) |
86 | 432d268c | Jun Nakajima | { |
87 | 432d268c | Jun Nakajima | unsigned long size; |
88 | 432d268c | Jun Nakajima | struct rlimit rlimit_as;
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89 | 432d268c | Jun Nakajima | |
90 | 432d268c | Jun Nakajima | mapcache = qemu_mallocz(sizeof (MapCache));
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91 | 432d268c | Jun Nakajima | |
92 | 432d268c | Jun Nakajima | QTAILQ_INIT(&mapcache->locked_entries); |
93 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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94 | 432d268c | Jun Nakajima | |
95 | 432d268c | Jun Nakajima | getrlimit(RLIMIT_AS, &rlimit_as); |
96 | ea6c5f8f | John Baboval | if (rlimit_as.rlim_max < MCACHE_MAX_SIZE) {
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97 | ea6c5f8f | John Baboval | rlimit_as.rlim_cur = rlimit_as.rlim_max; |
98 | ea6c5f8f | John Baboval | } else {
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99 | ea6c5f8f | John Baboval | rlimit_as.rlim_cur = MCACHE_MAX_SIZE; |
100 | ea6c5f8f | John Baboval | } |
101 | ea6c5f8f | John Baboval | |
102 | 432d268c | Jun Nakajima | setrlimit(RLIMIT_AS, &rlimit_as); |
103 | ea6c5f8f | John Baboval | mapcache->max_mcache_size = rlimit_as.rlim_cur; |
104 | 432d268c | Jun Nakajima | |
105 | 432d268c | Jun Nakajima | mapcache->nr_buckets = |
106 | 432d268c | Jun Nakajima | (((mapcache->max_mcache_size >> XC_PAGE_SHIFT) + |
107 | 432d268c | Jun Nakajima | (1UL << (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)) - 1) >> |
108 | 432d268c | Jun Nakajima | (MCACHE_BUCKET_SHIFT - XC_PAGE_SHIFT)); |
109 | 432d268c | Jun Nakajima | |
110 | 432d268c | Jun Nakajima | size = mapcache->nr_buckets * sizeof (MapCacheEntry);
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111 | 432d268c | Jun Nakajima | size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1); |
112 | e41d7c69 | Jan Kiszka | DPRINTF("%s, nr_buckets = %lx size %lu\n", __func__,
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113 | e41d7c69 | Jan Kiszka | mapcache->nr_buckets, size); |
114 | 432d268c | Jun Nakajima | mapcache->entry = qemu_mallocz(size); |
115 | 432d268c | Jun Nakajima | } |
116 | 432d268c | Jun Nakajima | |
117 | e41d7c69 | Jan Kiszka | static void xen_remap_bucket(MapCacheEntry *entry, |
118 | e41d7c69 | Jan Kiszka | target_phys_addr_t size, |
119 | e41d7c69 | Jan Kiszka | target_phys_addr_t address_index) |
120 | 432d268c | Jun Nakajima | { |
121 | 432d268c | Jun Nakajima | uint8_t *vaddr_base; |
122 | 432d268c | Jun Nakajima | xen_pfn_t *pfns; |
123 | 432d268c | Jun Nakajima | int *err;
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124 | ea6c5f8f | John Baboval | unsigned int i; |
125 | 432d268c | Jun Nakajima | target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; |
126 | 432d268c | Jun Nakajima | |
127 | e41d7c69 | Jan Kiszka | trace_xen_remap_bucket(address_index); |
128 | 432d268c | Jun Nakajima | |
129 | 432d268c | Jun Nakajima | pfns = qemu_mallocz(nb_pfn * sizeof (xen_pfn_t));
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130 | 432d268c | Jun Nakajima | err = qemu_mallocz(nb_pfn * sizeof (int)); |
131 | 432d268c | Jun Nakajima | |
132 | 432d268c | Jun Nakajima | if (entry->vaddr_base != NULL) { |
133 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
134 | 432d268c | Jun Nakajima | perror("unmap fails");
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135 | 432d268c | Jun Nakajima | exit(-1);
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136 | 432d268c | Jun Nakajima | } |
137 | 432d268c | Jun Nakajima | } |
138 | c13390cd | Stefano Stabellini | if (entry->valid_mapping != NULL) { |
139 | c13390cd | Stefano Stabellini | qemu_free(entry->valid_mapping); |
140 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
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141 | c13390cd | Stefano Stabellini | } |
142 | 432d268c | Jun Nakajima | |
143 | 432d268c | Jun Nakajima | for (i = 0; i < nb_pfn; i++) { |
144 | 432d268c | Jun Nakajima | pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT-XC_PAGE_SHIFT)) + i; |
145 | 432d268c | Jun Nakajima | } |
146 | 432d268c | Jun Nakajima | |
147 | 432d268c | Jun Nakajima | vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE, |
148 | 432d268c | Jun Nakajima | pfns, err, nb_pfn); |
149 | 432d268c | Jun Nakajima | if (vaddr_base == NULL) { |
150 | 432d268c | Jun Nakajima | perror("xc_map_foreign_bulk");
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151 | 432d268c | Jun Nakajima | exit(-1);
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152 | 432d268c | Jun Nakajima | } |
153 | 432d268c | Jun Nakajima | |
154 | 432d268c | Jun Nakajima | entry->vaddr_base = vaddr_base; |
155 | 432d268c | Jun Nakajima | entry->paddr_index = address_index; |
156 | c13390cd | Stefano Stabellini | entry->size = size; |
157 | c13390cd | Stefano Stabellini | entry->valid_mapping = (unsigned long *) qemu_mallocz(sizeof(unsigned long) * |
158 | c13390cd | Stefano Stabellini | BITS_TO_LONGS(size >> XC_PAGE_SHIFT)); |
159 | 432d268c | Jun Nakajima | |
160 | ea6c5f8f | John Baboval | bitmap_zero(entry->valid_mapping, nb_pfn); |
161 | ea6c5f8f | John Baboval | for (i = 0; i < nb_pfn; i++) { |
162 | ea6c5f8f | John Baboval | if (!err[i]) {
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163 | ea6c5f8f | John Baboval | bitmap_set(entry->valid_mapping, i, 1);
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164 | 432d268c | Jun Nakajima | } |
165 | 432d268c | Jun Nakajima | } |
166 | 432d268c | Jun Nakajima | |
167 | 432d268c | Jun Nakajima | qemu_free(pfns); |
168 | 432d268c | Jun Nakajima | qemu_free(err); |
169 | 432d268c | Jun Nakajima | } |
170 | 432d268c | Jun Nakajima | |
171 | e41d7c69 | Jan Kiszka | uint8_t *xen_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, |
172 | e41d7c69 | Jan Kiszka | uint8_t lock) |
173 | 432d268c | Jun Nakajima | { |
174 | 432d268c | Jun Nakajima | MapCacheEntry *entry, *pentry = NULL;
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175 | 432d268c | Jun Nakajima | target_phys_addr_t address_index = phys_addr >> MCACHE_BUCKET_SHIFT; |
176 | 432d268c | Jun Nakajima | target_phys_addr_t address_offset = phys_addr & (MCACHE_BUCKET_SIZE - 1);
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177 | c13390cd | Stefano Stabellini | target_phys_addr_t __size = size; |
178 | 432d268c | Jun Nakajima | |
179 | e41d7c69 | Jan Kiszka | trace_xen_map_cache(phys_addr); |
180 | 432d268c | Jun Nakajima | |
181 | c13390cd | Stefano Stabellini | if (address_index == mapcache->last_address_index && !lock && !__size) {
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182 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
183 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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184 | 432d268c | Jun Nakajima | } |
185 | 432d268c | Jun Nakajima | |
186 | c13390cd | Stefano Stabellini | /* size is always a multiple of MCACHE_BUCKET_SIZE */
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187 | c13390cd | Stefano Stabellini | if ((address_offset + (__size % MCACHE_BUCKET_SIZE)) > MCACHE_BUCKET_SIZE)
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188 | c13390cd | Stefano Stabellini | __size += MCACHE_BUCKET_SIZE; |
189 | c13390cd | Stefano Stabellini | if (__size % MCACHE_BUCKET_SIZE)
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190 | c13390cd | Stefano Stabellini | __size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE); |
191 | c13390cd | Stefano Stabellini | if (!__size)
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192 | c13390cd | Stefano Stabellini | __size = MCACHE_BUCKET_SIZE; |
193 | c13390cd | Stefano Stabellini | |
194 | 432d268c | Jun Nakajima | entry = &mapcache->entry[address_index % mapcache->nr_buckets]; |
195 | 432d268c | Jun Nakajima | |
196 | c13390cd | Stefano Stabellini | while (entry && entry->lock && entry->vaddr_base &&
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197 | c13390cd | Stefano Stabellini | (entry->paddr_index != address_index || entry->size != __size || |
198 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
199 | c13390cd | Stefano Stabellini | entry->valid_mapping))) { |
200 | 432d268c | Jun Nakajima | pentry = entry; |
201 | 432d268c | Jun Nakajima | entry = entry->next; |
202 | 432d268c | Jun Nakajima | } |
203 | 432d268c | Jun Nakajima | if (!entry) {
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204 | 432d268c | Jun Nakajima | entry = qemu_mallocz(sizeof (MapCacheEntry));
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205 | 432d268c | Jun Nakajima | pentry->next = entry; |
206 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
207 | 432d268c | Jun Nakajima | } else if (!entry->lock) { |
208 | 432d268c | Jun Nakajima | if (!entry->vaddr_base || entry->paddr_index != address_index ||
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209 | c13390cd | Stefano Stabellini | entry->size != __size || |
210 | c13390cd | Stefano Stabellini | !test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
211 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
212 | e41d7c69 | Jan Kiszka | xen_remap_bucket(entry, __size, address_index); |
213 | 432d268c | Jun Nakajima | } |
214 | 432d268c | Jun Nakajima | } |
215 | 432d268c | Jun Nakajima | |
216 | c13390cd | Stefano Stabellini | if(!test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT,
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217 | c13390cd | Stefano Stabellini | entry->valid_mapping)) { |
218 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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219 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(NULL);
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220 | 432d268c | Jun Nakajima | return NULL; |
221 | 432d268c | Jun Nakajima | } |
222 | 432d268c | Jun Nakajima | |
223 | 432d268c | Jun Nakajima | mapcache->last_address_index = address_index; |
224 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = entry->vaddr_base; |
225 | 432d268c | Jun Nakajima | if (lock) {
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226 | 432d268c | Jun Nakajima | MapCacheRev *reventry = qemu_mallocz(sizeof(MapCacheRev));
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227 | 432d268c | Jun Nakajima | entry->lock++; |
228 | 432d268c | Jun Nakajima | reventry->vaddr_req = mapcache->last_address_vaddr + address_offset; |
229 | 432d268c | Jun Nakajima | reventry->paddr_index = mapcache->last_address_index; |
230 | c13390cd | Stefano Stabellini | reventry->size = entry->size; |
231 | 432d268c | Jun Nakajima | QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next); |
232 | 432d268c | Jun Nakajima | } |
233 | 432d268c | Jun Nakajima | |
234 | e41d7c69 | Jan Kiszka | trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset); |
235 | 432d268c | Jun Nakajima | return mapcache->last_address_vaddr + address_offset;
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236 | 432d268c | Jun Nakajima | } |
237 | 432d268c | Jun Nakajima | |
238 | e41d7c69 | Jan Kiszka | ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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239 | 432d268c | Jun Nakajima | { |
240 | c13390cd | Stefano Stabellini | MapCacheEntry *entry = NULL, *pentry = NULL; |
241 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
242 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
243 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
244 | 432d268c | Jun Nakajima | int found = 0; |
245 | 432d268c | Jun Nakajima | |
246 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
247 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == ptr) {
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248 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
249 | c13390cd | Stefano Stabellini | size = reventry->size; |
250 | 432d268c | Jun Nakajima | found = 1;
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251 | 432d268c | Jun Nakajima | break;
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252 | 432d268c | Jun Nakajima | } |
253 | 432d268c | Jun Nakajima | } |
254 | 432d268c | Jun Nakajima | if (!found) {
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255 | e41d7c69 | Jan Kiszka | fprintf(stderr, "%s, could not find %p\n", __func__, ptr);
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256 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
257 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, |
258 | 432d268c | Jun Nakajima | reventry->vaddr_req); |
259 | 432d268c | Jun Nakajima | } |
260 | 432d268c | Jun Nakajima | abort(); |
261 | 432d268c | Jun Nakajima | return 0; |
262 | 432d268c | Jun Nakajima | } |
263 | 432d268c | Jun Nakajima | |
264 | c13390cd | Stefano Stabellini | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
265 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
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266 | c13390cd | Stefano Stabellini | pentry = entry; |
267 | c13390cd | Stefano Stabellini | entry = entry->next; |
268 | c13390cd | Stefano Stabellini | } |
269 | c13390cd | Stefano Stabellini | if (!entry) {
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270 | c13390cd | Stefano Stabellini | DPRINTF("Trying to find address %p that is not in the mapcache!\n", ptr);
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271 | c13390cd | Stefano Stabellini | return 0; |
272 | c13390cd | Stefano Stabellini | } |
273 | c13390cd | Stefano Stabellini | return (reventry->paddr_index << MCACHE_BUCKET_SHIFT) +
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274 | c13390cd | Stefano Stabellini | ((unsigned long) ptr - (unsigned long) entry->vaddr_base); |
275 | 432d268c | Jun Nakajima | } |
276 | 432d268c | Jun Nakajima | |
277 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache_entry(uint8_t *buffer)
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278 | 432d268c | Jun Nakajima | { |
279 | 432d268c | Jun Nakajima | MapCacheEntry *entry = NULL, *pentry = NULL; |
280 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
281 | 432d268c | Jun Nakajima | target_phys_addr_t paddr_index; |
282 | c13390cd | Stefano Stabellini | target_phys_addr_t size; |
283 | 432d268c | Jun Nakajima | int found = 0; |
284 | 432d268c | Jun Nakajima | |
285 | 432d268c | Jun Nakajima | if (mapcache->last_address_vaddr == buffer) {
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286 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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287 | 432d268c | Jun Nakajima | } |
288 | 432d268c | Jun Nakajima | |
289 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
290 | 432d268c | Jun Nakajima | if (reventry->vaddr_req == buffer) {
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291 | 432d268c | Jun Nakajima | paddr_index = reventry->paddr_index; |
292 | c13390cd | Stefano Stabellini | size = reventry->size; |
293 | 432d268c | Jun Nakajima | found = 1;
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294 | 432d268c | Jun Nakajima | break;
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295 | 432d268c | Jun Nakajima | } |
296 | 432d268c | Jun Nakajima | } |
297 | 432d268c | Jun Nakajima | if (!found) {
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298 | e41d7c69 | Jan Kiszka | DPRINTF("%s, could not find %p\n", __func__, buffer);
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299 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
300 | 432d268c | Jun Nakajima | DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req); |
301 | 432d268c | Jun Nakajima | } |
302 | 432d268c | Jun Nakajima | return;
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303 | 432d268c | Jun Nakajima | } |
304 | 432d268c | Jun Nakajima | QTAILQ_REMOVE(&mapcache->locked_entries, reventry, next); |
305 | 432d268c | Jun Nakajima | qemu_free(reventry); |
306 | 432d268c | Jun Nakajima | |
307 | 432d268c | Jun Nakajima | entry = &mapcache->entry[paddr_index % mapcache->nr_buckets]; |
308 | c13390cd | Stefano Stabellini | while (entry && (entry->paddr_index != paddr_index || entry->size != size)) {
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309 | 432d268c | Jun Nakajima | pentry = entry; |
310 | 432d268c | Jun Nakajima | entry = entry->next; |
311 | 432d268c | Jun Nakajima | } |
312 | 432d268c | Jun Nakajima | if (!entry) {
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313 | 432d268c | Jun Nakajima | DPRINTF("Trying to unmap address %p that is not in the mapcache!\n", buffer);
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314 | 432d268c | Jun Nakajima | return;
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315 | 432d268c | Jun Nakajima | } |
316 | 432d268c | Jun Nakajima | entry->lock--; |
317 | 432d268c | Jun Nakajima | if (entry->lock > 0 || pentry == NULL) { |
318 | 432d268c | Jun Nakajima | return;
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319 | 432d268c | Jun Nakajima | } |
320 | 432d268c | Jun Nakajima | |
321 | 432d268c | Jun Nakajima | pentry->next = entry->next; |
322 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
323 | 432d268c | Jun Nakajima | perror("unmap fails");
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324 | 432d268c | Jun Nakajima | exit(-1);
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325 | 432d268c | Jun Nakajima | } |
326 | c13390cd | Stefano Stabellini | qemu_free(entry->valid_mapping); |
327 | 432d268c | Jun Nakajima | qemu_free(entry); |
328 | 432d268c | Jun Nakajima | } |
329 | 432d268c | Jun Nakajima | |
330 | e41d7c69 | Jan Kiszka | void xen_invalidate_map_cache(void) |
331 | 432d268c | Jun Nakajima | { |
332 | 432d268c | Jun Nakajima | unsigned long i; |
333 | 432d268c | Jun Nakajima | MapCacheRev *reventry; |
334 | 432d268c | Jun Nakajima | |
335 | 432d268c | Jun Nakajima | /* Flush pending AIO before destroying the mapcache */
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336 | 432d268c | Jun Nakajima | qemu_aio_flush(); |
337 | 432d268c | Jun Nakajima | |
338 | 432d268c | Jun Nakajima | QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) { |
339 | 432d268c | Jun Nakajima | DPRINTF("There should be no locked mappings at this time, "
|
340 | 432d268c | Jun Nakajima | "but "TARGET_FMT_plx" -> %p is present\n", |
341 | 432d268c | Jun Nakajima | reventry->paddr_index, reventry->vaddr_req); |
342 | 432d268c | Jun Nakajima | } |
343 | 432d268c | Jun Nakajima | |
344 | 432d268c | Jun Nakajima | mapcache_lock(); |
345 | 432d268c | Jun Nakajima | |
346 | 432d268c | Jun Nakajima | for (i = 0; i < mapcache->nr_buckets; i++) { |
347 | 432d268c | Jun Nakajima | MapCacheEntry *entry = &mapcache->entry[i]; |
348 | 432d268c | Jun Nakajima | |
349 | 432d268c | Jun Nakajima | if (entry->vaddr_base == NULL) { |
350 | 432d268c | Jun Nakajima | continue;
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351 | 432d268c | Jun Nakajima | } |
352 | 432d268c | Jun Nakajima | |
353 | c13390cd | Stefano Stabellini | if (munmap(entry->vaddr_base, entry->size) != 0) { |
354 | 432d268c | Jun Nakajima | perror("unmap fails");
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355 | 432d268c | Jun Nakajima | exit(-1);
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356 | 432d268c | Jun Nakajima | } |
357 | 432d268c | Jun Nakajima | |
358 | 432d268c | Jun Nakajima | entry->paddr_index = 0;
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359 | 432d268c | Jun Nakajima | entry->vaddr_base = NULL;
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360 | c13390cd | Stefano Stabellini | entry->size = 0;
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361 | c13390cd | Stefano Stabellini | qemu_free(entry->valid_mapping); |
362 | c13390cd | Stefano Stabellini | entry->valid_mapping = NULL;
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363 | 432d268c | Jun Nakajima | } |
364 | 432d268c | Jun Nakajima | |
365 | 432d268c | Jun Nakajima | mapcache->last_address_index = -1;
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366 | 432d268c | Jun Nakajima | mapcache->last_address_vaddr = NULL;
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367 | 432d268c | Jun Nakajima | |
368 | 432d268c | Jun Nakajima | mapcache_unlock(); |
369 | 432d268c | Jun Nakajima | } |