1/* 2 * Permission is hereby granted, free of charge, to any person obtaining a copy 3 * of this software and associated documentation files (the "Software"), to 4 * deal in the Software without restriction, including without limitation the 5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 6 * sell copies of the Software, and to permit persons to whom the Software is 7 * furnished to do so, subject to the following conditions: 8 * 9 * The above copyright notice and this permission notice shall be included in 10 * all copies or substantial portions of the Software. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 18 * DEALINGS IN THE SOFTWARE. 19 * 20 * Copyright (C) IBM Corp. 2006 21 */ 22 23#ifndef _XEN_XENCOMM_H_ 24#define _XEN_XENCOMM_H_ 25 26/* A xencomm descriptor is a scatter/gather list containing physical 27 * addresses corresponding to a virtually contiguous memory area. The 28 * hypervisor translates these physical addresses to machine addresses to copy 29 * to and from the virtually contiguous area. 30 */ 31 32#define XENCOMM_MAGIC 0x58434F4D /* 'XCOM' */ 33#define XENCOMM_INVALID (~0UL) 34 35struct xencomm_desc { 36 uint32_t magic; 37 uint32_t nr_addrs; /* the number of entries in address[] */ 38 uint64_t address[0]; 39}; 40 41#endif /* _XEN_XENCOMM_H_ */ 42