1 /* $NetBSD: granttables.h,v 1.11 2020/04/05 17:48:30 jdolecek Exp $ */ 2 /* 3 * Copyright (c) 2006 Manuel Bouyer. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 */ 26 27 /* Interface to the Xen Grant tables */ 28 #include <xen/include/public/xen.h> 29 #include <xen/include/public/grant_table.h> 30 31 void xengnt_init(void); 32 33 /* suspend/resume grant table, for save/restore operations */ 34 bool xengnt_suspend(void); 35 bool xengnt_resume(void); 36 37 /* 38 * grant access to a remote domain. Returns a handle on the allocated grant 39 * entry in table in grant_ref_t *. 40 */ 41 int xengnt_grant_access(domid_t, paddr_t, int, grant_ref_t *); 42 43 /* 44 * Revoke access. Caller is responsible to ensure that the grant entry is 45 * not referenced any more. 46 */ 47 void xengnt_revoke_access(grant_ref_t); 48 49 /* 50 * Query grant status (i.e. if remote has a valid mapping to this grant). 51 * Returns GTF_reading | GTF_writing (0 if remote does not use it anymore). 52 */ 53 int xengnt_status(grant_ref_t); 54