1 /****************************************************************************** 2 * hvm/hvm_info_table.h 3 * 4 * HVM parameter and information table, written into guest memory map. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 * 24 * Copyright (c) 2006, Keir Fraser 25 */ 26 27 #ifndef __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ 28 #define __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ 29 30 #define HVM_INFO_PFN 0x09F 31 #define HVM_INFO_OFFSET 0x800 32 #define HVM_INFO_PADDR ((HVM_INFO_PFN << 12) + HVM_INFO_OFFSET) 33 34 /* Maximum we can support with current vLAPIC ID mapping. */ 35 #define HVM_MAX_VCPUS 128 36 37 /* 38 * In some cases SMP HVM guests may require knowledge of Xen's idea of vCPU ids 39 * for their vCPUs. For example, HYPERVISOR_vcpu_op and some EVTCHNOP_* 40 * hypercalls take vcpu id as a parameter. It is valid for HVM guests to assume 41 * that Xen's vCPU id always equals to ACPI (not APIC!) id in MADT table which 42 * is always present for SMP guests. 43 */ 44 45 struct hvm_info_table { 46 char signature[8]; /* "HVM INFO" */ 47 uint32_t length; 48 uint8_t checksum; 49 50 /* Should firmware build APIC descriptors (APIC MADT / MP BIOS)? */ 51 uint8_t apic_mode; 52 53 /* How many CPUs does this domain have? */ 54 uint32_t nr_vcpus; 55 56 /* 57 * MEMORY MAP provided by HVM domain builder. 58 * Notes: 59 * 1. page_to_phys(x) = x << 12 60 * 2. If a field is zero, the corresponding range does not exist. 61 */ 62 /* 63 * 0x0 to page_to_phys(low_mem_pgend)-1: 64 * RAM below 4GB (except for VGA hole 0xA0000-0xBFFFF) 65 */ 66 uint32_t low_mem_pgend; 67 /* 68 * page_to_phys(reserved_mem_pgstart) to 0xFFFFFFFF: 69 * Reserved for special memory mappings 70 */ 71 uint32_t reserved_mem_pgstart; 72 /* 73 * 0x100000000 to page_to_phys(high_mem_pgend)-1: 74 * RAM above 4GB 75 */ 76 uint32_t high_mem_pgend; 77 78 /* Bitmap of which CPUs are online at boot time. */ 79 uint8_t vcpu_online[(HVM_MAX_VCPUS + 7)/8]; 80 }; 81 82 #endif /* __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ */ 83