1 /*
2 * Copyright (c) 2017-2019, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * * Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * * Neither the name of Intel Corporation nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "pt_msec_cache.h"
30 #include "pt_section.h"
31 #include "pt_image.h"
32
33 #include <string.h>
34
35
pt_msec_cache_init(struct pt_msec_cache * cache)36 int pt_msec_cache_init(struct pt_msec_cache *cache)
37 {
38 if (!cache)
39 return -pte_internal;
40
41 memset(cache, 0, sizeof(*cache));
42
43 return 0;
44 }
45
pt_msec_cache_fini(struct pt_msec_cache * cache)46 void pt_msec_cache_fini(struct pt_msec_cache *cache)
47 {
48 if (!cache)
49 return;
50
51 (void) pt_msec_cache_invalidate(cache);
52 pt_msec_fini(&cache->msec);
53 }
54
pt_msec_cache_invalidate(struct pt_msec_cache * cache)55 int pt_msec_cache_invalidate(struct pt_msec_cache *cache)
56 {
57 struct pt_section *section;
58 int errcode;
59
60 if (!cache)
61 return -pte_internal;
62
63 section = pt_msec_section(&cache->msec);
64 if (!section)
65 return 0;
66
67 errcode = pt_section_unmap(section);
68 if (errcode < 0)
69 return errcode;
70
71 cache->msec.section = NULL;
72
73 return pt_section_put(section);
74 }
75
pt_msec_cache_read(struct pt_msec_cache * cache,const struct pt_mapped_section ** pmsec,struct pt_image * image,uint64_t vaddr)76 int pt_msec_cache_read(struct pt_msec_cache *cache,
77 const struct pt_mapped_section **pmsec,
78 struct pt_image *image, uint64_t vaddr)
79 {
80 struct pt_mapped_section *msec;
81 int isid, errcode;
82
83 if (!cache || !pmsec)
84 return -pte_internal;
85
86 msec = &cache->msec;
87 isid = cache->isid;
88
89 errcode = pt_image_validate(image, msec, vaddr, isid);
90 if (errcode < 0)
91 return errcode;
92
93 *pmsec = msec;
94
95 return isid;
96
97 }
98
pt_msec_cache_fill(struct pt_msec_cache * cache,const struct pt_mapped_section ** pmsec,struct pt_image * image,const struct pt_asid * asid,uint64_t vaddr)99 int pt_msec_cache_fill(struct pt_msec_cache *cache,
100 const struct pt_mapped_section **pmsec,
101 struct pt_image *image, const struct pt_asid *asid,
102 uint64_t vaddr)
103 {
104 struct pt_mapped_section *msec;
105 struct pt_section *section;
106 int errcode, isid;
107
108 if (!cache || !pmsec)
109 return -pte_internal;
110
111 errcode = pt_msec_cache_invalidate(cache);
112 if (errcode < 0)
113 return errcode;
114
115 msec = &cache->msec;
116
117 isid = pt_image_find(image, msec, asid, vaddr);
118 if (isid < 0)
119 return isid;
120
121 section = pt_msec_section(msec);
122
123 errcode = pt_section_map(section);
124 if (errcode < 0) {
125 (void) pt_section_put(section);
126 msec->section = NULL;
127
128 return errcode;
129 }
130
131 *pmsec = msec;
132
133 cache->isid = isid;
134
135 return isid;
136 }
137