| /* |
| * Copyright (c) 2017-2019, Intel Corporation |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * * Neither the name of Intel Corporation nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "pt_msec_cache.h" |
| #include "pt_section.h" |
| #include "pt_image.h" |
| |
| #include <string.h> |
| |
| |
| int pt_msec_cache_init(struct pt_msec_cache *cache) |
| { |
| if (!cache) |
| return -pte_internal; |
| |
| memset(cache, 0, sizeof(*cache)); |
| |
| return 0; |
| } |
| |
| void pt_msec_cache_fini(struct pt_msec_cache *cache) |
| { |
| if (!cache) |
| return; |
| |
| (void) pt_msec_cache_invalidate(cache); |
| pt_msec_fini(&cache->msec); |
| } |
| |
| int pt_msec_cache_invalidate(struct pt_msec_cache *cache) |
| { |
| struct pt_section *section; |
| int errcode; |
| |
| if (!cache) |
| return -pte_internal; |
| |
| section = pt_msec_section(&cache->msec); |
| if (!section) |
| return 0; |
| |
| errcode = pt_section_unmap(section); |
| if (errcode < 0) |
| return errcode; |
| |
| cache->msec.section = NULL; |
| |
| return pt_section_put(section); |
| } |
| |
| int pt_msec_cache_read(struct pt_msec_cache *cache, |
| const struct pt_mapped_section **pmsec, |
| struct pt_image *image, uint64_t vaddr) |
| { |
| struct pt_mapped_section *msec; |
| int isid, errcode; |
| |
| if (!cache || !pmsec) |
| return -pte_internal; |
| |
| msec = &cache->msec; |
| isid = cache->isid; |
| |
| errcode = pt_image_validate(image, msec, vaddr, isid); |
| if (errcode < 0) |
| return errcode; |
| |
| *pmsec = msec; |
| |
| return isid; |
| |
| } |
| |
| int 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) |
| { |
| struct pt_mapped_section *msec; |
| struct pt_section *section; |
| int errcode, isid; |
| |
| if (!cache || !pmsec) |
| return -pte_internal; |
| |
| errcode = pt_msec_cache_invalidate(cache); |
| if (errcode < 0) |
| return errcode; |
| |
| msec = &cache->msec; |
| |
| isid = pt_image_find(image, msec, asid, vaddr); |
| if (isid < 0) |
| return isid; |
| |
| section = pt_msec_section(msec); |
| |
| errcode = pt_section_map(section); |
| if (errcode < 0) { |
| (void) pt_section_put(section); |
| msec->section = NULL; |
| |
| return errcode; |
| } |
| |
| *pmsec = msec; |
| |
| cache->isid = isid; |
| |
| return isid; |
| } |