1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009-2012,2016-2017 Microsoft Corp. 5 * Copyright (c) 2012 NetApp Inc. 6 * Copyright (c) 2012 Citrix Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _HYPERV_H_ 32 #define _HYPERV_H_ 33 34 #ifdef _KERNEL 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 39 #define MSR_HV_TIME_REF_COUNT 0x40000020 40 41 #define CPUID_HV_MSR_TIME_REFCNT 0x0002 /* MSR_HV_TIME_REF_COUNT */ 42 #define CPUID_HV_MSR_SYNIC 0x0004 /* MSRs for SynIC */ 43 #define CPUID_HV_MSR_SYNTIMER 0x0008 /* MSRs for SynTimer */ 44 #define CPUID_HV_MSR_APIC 0x0010 /* MSR_HV_{EOI,ICR,TPR} */ 45 #define CPUID_HV_MSR_HYPERCALL 0x0020 /* MSR_HV_GUEST_OS_ID 46 * MSR_HV_HYPERCALL */ 47 #define CPUID_HV_MSR_VP_INDEX 0x0040 /* MSR_HV_VP_INDEX */ 48 #define CPUID_HV_MSR_REFERENCE_TSC 0x0200 /* MSR_HV_REFERENCE_TSC */ 49 #define CPUID_HV_MSR_GUEST_IDLE 0x0400 /* MSR_HV_GUEST_IDLE */ 50 51 #ifndef NANOSEC 52 #define NANOSEC 1000000000ULL 53 #endif 54 #define HYPERV_TIMER_NS_FACTOR 100ULL 55 #define HYPERV_TIMER_FREQ (NANOSEC / HYPERV_TIMER_NS_FACTOR) 56 57 #endif /* _KERNEL */ 58 59 #define HYPERV_REFTSC_DEVNAME "hv_tsc" 60 61 /* 62 * Hyper-V Reference TSC 63 */ 64 struct hyperv_reftsc { 65 volatile uint32_t tsc_seq; 66 volatile uint32_t tsc_rsvd1; 67 volatile uint64_t tsc_scale; 68 volatile int64_t tsc_ofs; 69 } __packed __aligned(PAGE_SIZE); 70 #ifdef CTASSERT 71 CTASSERT(sizeof(struct hyperv_reftsc) == PAGE_SIZE); 72 #endif 73 74 #ifdef _KERNEL 75 76 struct hyperv_guid { 77 uint8_t hv_guid[16]; 78 } __packed; 79 80 #define HYPERV_GUID_STRLEN 40 81 82 typedef uint64_t (*hyperv_tc64_t)(void); 83 84 int hyperv_guid2str(const struct hyperv_guid *, char *, 85 size_t); 86 87 void hyperv_init_tc(void); 88 int hypercall_page_setup(vm_paddr_t); 89 void hypercall_disable(void); 90 bool hyperv_identify_features(void); 91 92 /* 93 * hyperv_tc64 could be NULL, if there were no suitable Hyper-V 94 * specific timecounter. 95 */ 96 extern hyperv_tc64_t hyperv_tc64; 97 extern u_int hyperv_features; /* CPUID_HV_MSR_ */ 98 extern u_int hyperv_ver_major; 99 100 /* 101 * Vmbus version after negotiation with host. 102 */ 103 extern uint32_t vmbus_current_version; 104 105 #endif /* _KERNEL */ 106 107 #endif /* _HYPERV_H_ */ 108