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 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 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 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 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 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