1 /* 2 * Copyright (c) 2014-2019, 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 #ifndef PT_ASID_H 30 #define PT_ASID_H 31 32 #include <stddef.h> 33 34 struct pt_asid; 35 36 37 /* Read an asid provided by our user. 38 * 39 * Translate a user-provided asid in @user into @asid. This uses default values 40 * for fields that are not provided by the user and for all fields, if @user is 41 * NULL. 42 * 43 * Fields set in @user that are not known (i.e. from a newer version of this 44 * library) will be ignored. 45 * 46 * Returns zero on success, a negative error code otherwise. 47 * Returns -pte_internal, if @asid is NULL. 48 */ 49 extern int pt_asid_from_user(struct pt_asid *asid, const struct pt_asid *user); 50 51 /* Provide an asid to the user. 52 * 53 * Translate @asid into a potentially older or newer version in @user. 54 * 55 * Returns zero on success, a negative error code otherwise. 56 * Returns -pte_internal, if @user or @asid is NULL. 57 * Returns -pte_invalid, if @size is too small. 58 */ 59 extern int pt_asid_to_user(struct pt_asid *user, const struct pt_asid *asid, 60 size_t size); 61 62 /* Match two asids. 63 * 64 * Asids match if all fields provide either default values or are identical. 65 * 66 * Returns a positive number if @lhs matches @rhs. 67 * Returns zero if @lhs does not match @rhs. 68 * Returns a negative error code otherwise. 69 * 70 * Returns -pte_internal if @lhs or @rhs are NULL. 71 */ 72 extern int pt_asid_match(const struct pt_asid *lhs, const struct pt_asid *rhs); 73 74 #endif /* PT_ASID_H */ 75