hyperv.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    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  * $FreeBSD$
   31  */
   32 
   33 #ifndef _HYPERV_H_
   34 #define _HYPERV_H_
   35 
   36 #ifdef _KERNEL
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 
   41 #define MSR_HV_TIME_REF_COUNT           0x40000020
   42 
   43 #define CPUID_HV_MSR_TIME_REFCNT        0x0002  /* MSR_HV_TIME_REF_COUNT */
   44 #define CPUID_HV_MSR_SYNIC              0x0004  /* MSRs for SynIC */
   45 #define CPUID_HV_MSR_SYNTIMER           0x0008  /* MSRs for SynTimer */
   46 #define CPUID_HV_MSR_APIC               0x0010  /* MSR_HV_{EOI,ICR,TPR} */
   47 #define CPUID_HV_MSR_HYPERCALL          0x0020  /* MSR_HV_GUEST_OS_ID
   48                                                  * MSR_HV_HYPERCALL */
   49 #define CPUID_HV_MSR_VP_INDEX           0x0040  /* MSR_HV_VP_INDEX */
   50 #define CPUID_HV_MSR_REFERENCE_TSC      0x0200  /* MSR_HV_REFERENCE_TSC */
   51 #define CPUID_HV_MSR_GUEST_IDLE         0x0400  /* MSR_HV_GUEST_IDLE */
   52 
   53 #ifndef NANOSEC
   54 #define NANOSEC                         1000000000ULL
   55 #endif
   56 #define HYPERV_TIMER_NS_FACTOR          100ULL
   57 #define HYPERV_TIMER_FREQ               (NANOSEC / HYPERV_TIMER_NS_FACTOR)
   58 
   59 #endif  /* _KERNEL */
   60 
   61 #define HYPERV_REFTSC_DEVNAME           "hv_tsc"
   62 
   63 /*
   64  * Hyper-V Reference TSC
   65  */
   66 struct hyperv_reftsc {
   67         volatile uint32_t               tsc_seq;
   68         volatile uint32_t               tsc_rsvd1;
   69         volatile uint64_t               tsc_scale;
   70         volatile int64_t                tsc_ofs;
   71 } __packed __aligned(PAGE_SIZE);
   72 #ifdef CTASSERT
   73 CTASSERT(sizeof(struct hyperv_reftsc) == PAGE_SIZE);
   74 #endif
   75 
   76 #ifdef _KERNEL
   77 
   78 struct hyperv_guid {
   79         uint8_t                         hv_guid[16];
   80 } __packed;
   81 
   82 #define HYPERV_GUID_STRLEN              40
   83 
   84 typedef uint64_t                        (*hyperv_tc64_t)(void);
   85 
   86 int                     hyperv_guid2str(const struct hyperv_guid *, char *,
   87                             size_t);
   88 
   89 void    hyperv_init_tc(void);
   90 int             hypercall_page_setup(vm_paddr_t);
   91 void    hypercall_disable(void);
   92 bool    hyperv_identify_features(void);
   93 
   94 /*
   95  * hyperv_tc64 could be NULL, if there were no suitable Hyper-V
   96  * specific timecounter.
   97  */
   98 extern hyperv_tc64_t    hyperv_tc64;
   99 extern u_int            hyperv_features;        /* CPUID_HV_MSR_ */
  100 extern u_int            hyperv_ver_major;
  101 
  102 /*
  103  * Vmbus version after negotiation with host.
  104  */
  105 extern uint32_t         vmbus_current_version;
  106 
  107 #endif  /* _KERNEL */
  108 
  109 #endif  /* _HYPERV_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/hyperv/include/hyperv.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/hyperv/include/hyperv.h