Here is the list of specific changes:
 - where required by C++ compiler applied appropriate C++ cast (static_cast, 
reinterpret_cast, const_cast)
 - where necessary replaced FreeBSD headers with OSv BSD porting headers (like 
<bsd/porting/…>)
 - replaced *msr() calls with corresponding OSv processor::*msr() calls (for 
example rdmsr() with processor::rdmsr())
 - replaced do_cpuid() with processor::cpuid()
 - temporarily disabled code that will eventually be used once VMBus based 
drivers are ported to OSv
 - commented out or disabled code that does not apply to OSv
 - added hyperv_is_timecount_available() to allow detection of time reference 
count mechanism
 - disabled all FreeBSD SYSCTL related code

Signed-off-by: Waldemar Kozaczuk <jwkozac...@gmail.com>
---
 Makefile                              |   2 +
 bsd/sys/dev/hyperv/include/hyperv.h   |   3 +
 bsd/sys/dev/hyperv/include/vmbus.h    |   2 +-
 bsd/sys/dev/hyperv/vmbus/hyperv.cc    | 212 ++++++++++++++++++++--------------
 bsd/sys/dev/hyperv/vmbus/hyperv_reg.h | 193 +++++++++++++++++++++++++++++++
 5 files changed, 323 insertions(+), 89 deletions(-)
 create mode 100644 bsd/sys/dev/hyperv/vmbus/hyperv_reg.h

diff --git a/Makefile b/Makefile
index ca80cea..504d5d1 100644
--- a/Makefile
+++ b/Makefile
@@ -618,6 +618,8 @@ bsd += bsd/sys/dev/xen/netfront/netfront.o
 bsd += bsd/sys/dev/xen/blkfront/blkfront.o
 endif
 
+bsd += bsd/sys/dev/hyperv/vmbus/hyperv.o
+
 bsd += bsd/sys/dev/random/hash.o
 bsd += bsd/sys/dev/random/randomdev_soft.o
 bsd += bsd/sys/dev/random/yarrow.o
diff --git a/bsd/sys/dev/hyperv/include/hyperv.h 
b/bsd/sys/dev/hyperv/include/hyperv.h
index 4d0f5b7..7b26380 100644
--- a/bsd/sys/dev/hyperv/include/hyperv.h
+++ b/bsd/sys/dev/hyperv/include/hyperv.h
@@ -91,6 +91,9 @@ int                     hyperv_guid2str(const struct 
hyperv_guid *, char *,
 extern hyperv_tc64_t    hyperv_tc64;
 extern u_int            hyperv_features;        /* CPUID_HV_MSR_ */
 
+bool                    hyperv_identify(void);
+bool                    hyperv_is_timecount_available();
+
 #endif  /* _KERNEL */
 
 #endif  /* _HYPERV_H_ */
diff --git a/bsd/sys/dev/hyperv/include/vmbus.h 
b/bsd/sys/dev/hyperv/include/vmbus.h
index 73c4561..c1db27f 100644
--- a/bsd/sys/dev/hyperv/include/vmbus.h
+++ b/bsd/sys/dev/hyperv/include/vmbus.h
@@ -130,7 +130,7 @@ typedef void    (*vmbus_chan_callback_t)(struct 
vmbus_channel *, void *);
 static __inline struct vmbus_channel *
 vmbus_get_channel(device_t dev)
 {
-    return device_get_ivars(dev);
+    return static_cast<struct vmbus_channel *>(device_get_ivars(dev));
 }
 
 /*
diff --git a/bsd/sys/dev/hyperv/vmbus/hyperv.cc 
b/bsd/sys/dev/hyperv/vmbus/hyperv.cc
index 757672a..8221d0c 100644
--- a/bsd/sys/dev/hyperv/vmbus/hyperv.cc
+++ b/bsd/sys/dev/hyperv/vmbus/hyperv.cc
@@ -32,17 +32,24 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <bsd/porting/netport.h>
+
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/systm.h>
-#include <sys/timetc.h>
+#include <sys/conf.h>
 
 #include <dev/hyperv/include/hyperv.h>
 #include <dev/hyperv/include/hyperv_busdma.h>
-#include <dev/hyperv/vmbus/hyperv_machdep.h>
 #include <dev/hyperv/vmbus/hyperv_reg.h>
+#ifdef OSV_VMBUS_ENABLED // Temporarily disable the code until VMBus based 
drivers are ported to OSv
+#include <dev/hyperv/vmbus/hyperv_machdep.h>
 #include <dev/hyperv/vmbus/hyperv_var.h>
+#endif
 
+#include <osv/debug.hh>
+
+/*
 #define HYPERV_FREEBSD_BUILD            0ULL
 #define HYPERV_FREEBSD_VERSION          ((uint64_t)__FreeBSD_version)
 #define HYPERV_FREEBSD_OSID             0ULL
@@ -61,15 +68,18 @@ __FBSDID("$FreeBSD$");
      MSR_HV_GUESTID_VERSION_FREEBSD | \
      MSR_HV_GUESTID_OSID_FREEBSD |      \
      MSR_HV_GUESTID_OSTYPE_FREEBSD)
-
+*/
 struct hypercall_ctx {
     void                        *hc_addr;
     struct hyperv_dma   hc_dma;
 };
 
+#if 0
 static u_int                    hyperv_get_timecount(struct timecounter *);
-static bool                     hyperv_identify(void);
+#endif
+#ifdef OSV_VMBUS_ENABLED
 static void                     hypercall_memfree(void);
+#endif
 
 u_int                           hyperv_features;
 u_int                           hyperv_recommends;
@@ -79,6 +89,7 @@ static u_int                    hyperv_features3;
 
 hyperv_tc64_t                   hyperv_tc64;
 
+#if 0 // Used by tc_init() which does not apply to OSv
 static struct timecounter       hyperv_timecounter = {
     .tc_get_timecount   = hyperv_get_timecount,
     .tc_poll_pps        = NULL,
@@ -89,22 +100,32 @@ static struct timecounter       hyperv_timecounter = {
     .tc_flags           = 0,
     .tc_priv            = NULL
 };
+#endif
 
+#ifdef OSV_VMBUS_ENABLED
 static struct hypercall_ctx     hypercall_context;
+#endif
 
+#if 0
 static u_int
 hyperv_get_timecount(struct timecounter *tc __unused)
 {
-    return rdmsr(MSR_HV_TIME_REF_COUNT);
+    return processor::rdmsr(MSR_HV_TIME_REF_COUNT);
 }
+#endif
 
-static uint64_t
+bool
+hyperv_is_timecount_available() {
+    return (hyperv_features & CPUID_HV_MSR_TIME_REFCNT);
+}
+
+uint64_t
 hyperv_tc64_rdmsr(void)
 {
-
-    return (rdmsr(MSR_HV_TIME_REF_COUNT));
+    return (processor::rdmsr(MSR_HV_TIME_REF_COUNT));
 }
 
+#ifdef OSV_VMBUS_ENABLED // Temporarily disable the code until VMBus based 
drivers are ported to OSv
 uint64_t
 hypercall_post_message(bus_addr_t msg_paddr)
 {
@@ -131,116 +152,122 @@ hyperv_guid2str(const struct hyperv_guid *guid, char 
*buf, size_t sz)
         d[5], d[4], d[7], d[6], d[8], d[9],
         d[10], d[11], d[12], d[13], d[14], d[15]);
 }
+#endif
 
-static bool
+bool
 hyperv_identify(void)
 {
-    u_int regs[4];
+    struct processor::cpuid_result regs;
     unsigned int maxleaf;
 
+    /* INVESTIGATE: How do I know that OSv is running on Hyper-V?
     if (vm_guest != VM_GUEST_HV)
         return (false);
+     */
 
-    do_cpuid(CPUID_LEAF_HV_MAXLEAF, regs);
-    maxleaf = regs[0];
+    regs = processor::cpuid(CPUID_LEAF_HV_MAXLEAF);
+    maxleaf = regs.a;
     if (maxleaf < CPUID_LEAF_HV_LIMITS)
         return (false);
 
-    do_cpuid(CPUID_LEAF_HV_INTERFACE, regs);
-    if (regs[0] != CPUID_HV_IFACE_HYPERV)
+    regs = processor::cpuid(CPUID_LEAF_HV_INTERFACE);
+    if (regs.a != CPUID_HV_IFACE_HYPERV)
         return (false);
 
-    do_cpuid(CPUID_LEAF_HV_FEATURES, regs);
-    if ((regs[0] & CPUID_HV_MSR_HYPERCALL) == 0) {
+    regs = processor::cpuid(CPUID_LEAF_HV_FEATURES);
+    if ((regs.a & CPUID_HV_MSR_HYPERCALL) == 0) {
         /*
          * Hyper-V w/o Hypercall is impossible; someone
          * is faking Hyper-V.
          */
         return (false);
     }
-    hyperv_features = regs[0];
-    hyperv_pm_features = regs[2];
-    hyperv_features3 = regs[3];
-
-    do_cpuid(CPUID_LEAF_HV_IDENTITY, regs);
-    printf("Hyper-V Version: %d.%d.%d [SP%d]\n",
-        regs[1] >> 16, regs[1] & 0xffff, regs[0], regs[2]);
-
-    printf("  Features=0x%b\n", hyperv_features,
-        "\020"
-        "\001VPRUNTIME" /* MSR_HV_VP_RUNTIME */
-        "\002TMREFCNT"  /* MSR_HV_TIME_REF_COUNT */
-        "\003SYNIC"             /* MSRs for SynIC */
-        "\004SYNTM"             /* MSRs for SynTimer */
-        "\005APIC"              /* MSR_HV_{EOI,ICR,TPR} */
-        "\006HYPERCALL" /* MSR_HV_{GUEST_OS_ID,HYPERCALL} */
-        "\007VPINDEX"   /* MSR_HV_VP_INDEX */
-        "\010RESET"             /* MSR_HV_RESET */
-        "\011STATS"             /* MSR_HV_STATS_ */
-        "\012REFTSC"    /* MSR_HV_REFERENCE_TSC */
-        "\013IDLE"              /* MSR_HV_GUEST_IDLE */
-        "\014TMFREQ"    /* MSR_HV_{TSC,APIC}_FREQUENCY */
-        "\015DEBUG");   /* MSR_HV_SYNTH_DEBUG_ */
-    printf("  PM Features=0x%b [C%u]\n",
-        (hyperv_pm_features & ~CPUPM_HV_CSTATE_MASK),
-        "\020"
-        "\005C3HPET",   /* HPET is required for C3 state */
-        CPUPM_HV_CSTATE(hyperv_pm_features));
-    printf("  Features3=0x%b\n", hyperv_features3,
-        "\020"
-        "\001MWAIT"             /* MWAIT */
-        "\002DEBUG"             /* guest debug support */
-        "\003PERFMON"   /* performance monitor */
-        "\004PCPUDPE"   /* physical CPU dynamic partition event */
-        "\005XMMHC"             /* hypercall input through XMM regs */
-        "\006IDLE"              /* guest idle support */
-        "\007SLEEP"             /* hypervisor sleep support */
-        "\010NUMA"              /* NUMA distance query support */
-        "\011TMFREQ"    /* timer frequency query (TSC, LAPIC) */
-        "\012SYNCMC"    /* inject synthetic machine checks */
-        "\013CRASH"             /* MSRs for guest crash */
-        "\014DEBUGMSR"  /* MSRs for guest debug */
-        "\015NPIEP"             /* NPIEP */
-        "\016HVDIS");   /* disabling hypervisor */
-
-    do_cpuid(CPUID_LEAF_HV_RECOMMENDS, regs);
-    hyperv_recommends = regs[0];
-    if (bootverbose)
-        printf("  Recommends: %08x %08x\n", regs[0], regs[1]);
-
-    do_cpuid(CPUID_LEAF_HV_LIMITS, regs);
-    if (bootverbose) {
-        printf("  Limits: Vcpu:%d Lcpu:%d Int:%d\n",
-            regs[0], regs[1], regs[2]);
-    }
-
-    if (maxleaf >= CPUID_LEAF_HV_HWFEATURES) {
-        do_cpuid(CPUID_LEAF_HV_HWFEATURES, regs);
-        if (bootverbose) {
-            printf("  HW Features: %08x, AMD: %08x\n",
-                regs[0], regs[3]);
-        }
-    }
+    hyperv_features = regs.a;
+    hyperv_pm_features = regs.c;
+    hyperv_features3 = regs.d;
+
+//    regs = processor::cpuid(CPUID_LEAF_HV_IDENTITY);
+//    printf("Hyper-V Version: %d.%d.%d [SP%d]\n",
+//        regs.b >> 16, regs.b & 0xffff, regs.a, regs.c);
+//
+//    printf("  Features=0x%b\n", hyperv_features,
+//        "\020"
+//        "\001VPRUNTIME" /* MSR_HV_VP_RUNTIME */
+//        "\002TMREFCNT"  /* MSR_HV_TIME_REF_COUNT */
+//        "\003SYNIC"             /* MSRs for SynIC */
+//        "\004SYNTM"             /* MSRs for SynTimer */
+//        "\005APIC"              /* MSR_HV_{EOI,ICR,TPR} */
+//        "\006HYPERCALL" /* MSR_HV_{GUEST_OS_ID,HYPERCALL} */
+//        "\007VPINDEX"   /* MSR_HV_VP_INDEX */
+//        "\010RESET"             /* MSR_HV_RESET */
+//        "\011STATS"             /* MSR_HV_STATS_ */
+//        "\012REFTSC"    /* MSR_HV_REFERENCE_TSC */
+//        "\013IDLE"              /* MSR_HV_GUEST_IDLE */
+//        "\014TMFREQ"    /* MSR_HV_{TSC,APIC}_FREQUENCY */
+//        "\015DEBUG");   /* MSR_HV_SYNTH_DEBUG_ */
+//    printf("  PM Features=0x%b [C%u]\n",
+//        (hyperv_pm_features & ~CPUPM_HV_CSTATE_MASK),
+//        "\020"
+//        "\005C3HPET",   /* HPET is required for C3 state */
+//        CPUPM_HV_CSTATE(hyperv_pm_features));
+//    printf("  Features3=0x%b\n", hyperv_features3,
+//        "\020"
+//        "\001MWAIT"             /* MWAIT */
+//        "\002DEBUG"             /* guest debug support */
+//        "\003PERFMON"   /* performance monitor */
+//        "\004PCPUDPE"   /* physical CPU dynamic partition event */
+//        "\005XMMHC"             /* hypercall input through XMM regs */
+//        "\006IDLE"              /* guest idle support */
+//        "\007SLEEP"             /* hypervisor sleep support */
+//        "\010NUMA"              /* NUMA distance query support */
+//        "\011TMFREQ"    /* timer frequency query (TSC, LAPIC) */
+//        "\012SYNCMC"    /* inject synthetic machine checks */
+//        "\013CRASH"             /* MSRs for guest crash */
+//        "\014DEBUGMSR"  /* MSRs for guest debug */
+//        "\015NPIEP"             /* NPIEP */
+//        "\016HVDIS");   /* disabling hypervisor */
+
+    regs = processor::cpuid(CPUID_LEAF_HV_RECOMMENDS);
+    hyperv_recommends = regs.a;
+//    if (bootverbose)
+//        printf("  Recommends: %08x %08x\n", regs.a, regs.b);
+//
+//    regs = processor::cpuid(CPUID_LEAF_HV_LIMITS);
+//    if (bootverbose) {
+//        printf("  Limits: Vcpu:%d Lcpu:%d Int:%d\n",
+//               regs.a, regs.b, regs.c);
+//    }
+
+//    if (maxleaf >= CPUID_LEAF_HV_HWFEATURES) {
+//        regs = processor::cpuid(CPUID_LEAF_HV_HWFEATURES);
+//        if (bootverbose) {
+//            printf("  HW Features: %08x, AMD: %08x\n",
+//                  regs.a, regs.d);
+//        }
+//    }
 
     return (true);
 }
 
-static void
+#if 0 //The function hyperv_init() does not apply to OSv as is
+void
 hyperv_init(void *dummy __unused)
 {
     if (!hyperv_identify()) {
         /* Not Hyper-V; reset guest id to the generic one. */
         if (vm_guest == VM_GUEST_HV)
             vm_guest = VM_GUEST_VM;
+
         return;
     }
 
     /* Set guest id */
-    wrmsr(MSR_HV_GUEST_OS_ID, MSR_HV_GUESTID_FREEBSD);
+    processor::wrmsr(MSR_HV_GUEST_OS_ID, MSR_HV_GUESTID_FREEBSD);
 
     if (hyperv_features & CPUID_HV_MSR_TIME_REFCNT) {
         /* Register Hyper-V timecounter */
         tc_init(&hyperv_timecounter);
+        hyperv_timecounter.tc_flags = 0;
 
         /*
          * Install 64 bits timecounter method for other modules
@@ -251,7 +278,9 @@ hyperv_init(void *dummy __unused)
 }
 SYSINIT(hyperv_initialize, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hyperv_init,
     NULL);
+#endif
 
+#ifdef OSV_VMBUS_ENABLED // Temporarily disable the code until VMBus based 
drivers are ported to OSv
 static void
 hypercall_memfree(void)
 {
@@ -260,25 +289,29 @@ hypercall_memfree(void)
     hypercall_context.hc_addr = NULL;
 }
 
-static void
+void
 hypercall_create(void *arg __unused)
 {
     uint64_t hc, hc_orig;
 
+    /* INVESTIGATE: For now disable logic related to detecting if OSv is 
running on Hyper/V
     if (vm_guest != VM_GUEST_HV)
         return;
+    */
 
     hypercall_context.hc_addr = hyperv_dmamem_alloc(NULL, PAGE_SIZE, 0,
         PAGE_SIZE, &hypercall_context.hc_dma, BUS_DMA_WAITOK);
     if (hypercall_context.hc_addr == NULL) {
         printf("hyperv: Hypercall page allocation failed\n");
         /* Can't perform any Hyper-V specific actions */
+        /* INVESTIGATE: For now disable logic related to detecting if OSv is 
running on Hyper/V
         vm_guest = VM_GUEST_VM;
+        */
         return;
     }
 
     /* Get the 'reserved' bits, which requires preservation. */
-    hc_orig = rdmsr(MSR_HV_HYPERCALL);
+    hc_orig = processor::rdmsr(MSR_HV_HYPERCALL);
 
     /*
      * Setup the Hypercall page.
@@ -289,17 +322,19 @@ hypercall_create(void *arg __unused)
         MSR_HV_HYPERCALL_PGSHIFT) |
         (hc_orig & MSR_HV_HYPERCALL_RSVD_MASK) |
         MSR_HV_HYPERCALL_ENABLE;
-    wrmsr(MSR_HV_HYPERCALL, hc);
+    processor::wrmsr(MSR_HV_HYPERCALL, hc);
 
     /*
      * Confirm that Hypercall page did get setup.
      */
-    hc = rdmsr(MSR_HV_HYPERCALL);
+    hc = processor::rdmsr(MSR_HV_HYPERCALL);
     if ((hc & MSR_HV_HYPERCALL_ENABLE) == 0) {
         printf("hyperv: Hypercall setup failed\n");
         hypercall_memfree();
         /* Can't perform any Hyper-V specific actions */
+        /* INVESTIGATE: For now disable logic related to detecting if OSv is 
running on Hyper/V
         vm_guest = VM_GUEST_VM;
+        */
         return;
     }
     if (bootverbose)
@@ -307,7 +342,7 @@ hypercall_create(void *arg __unused)
 }
 SYSINIT(hypercall_ctor, SI_SUB_DRIVERS, SI_ORDER_FIRST, hypercall_create, 
NULL);
 
-static void
+void
 hypercall_destroy(void *arg __unused)
 {
     uint64_t hc;
@@ -316,8 +351,8 @@ hypercall_destroy(void *arg __unused)
         return;
 
     /* Disable Hypercall */
-    hc = rdmsr(MSR_HV_HYPERCALL);
-    wrmsr(MSR_HV_HYPERCALL, (hc & MSR_HV_HYPERCALL_RSVD_MASK));
+    hc = processor::rdmsr(MSR_HV_HYPERCALL);
+    processor::wrmsr(MSR_HV_HYPERCALL, (hc & MSR_HV_HYPERCALL_RSVD_MASK));
     hypercall_memfree();
 
     if (bootverbose)
@@ -325,3 +360,4 @@ hypercall_destroy(void *arg __unused)
 }
 SYSUNINIT(hypercall_dtor, SI_SUB_DRIVERS, SI_ORDER_FIRST, hypercall_destroy,
     NULL);
+#endif
\ No newline at end of file
diff --git a/bsd/sys/dev/hyperv/vmbus/hyperv_reg.h 
b/bsd/sys/dev/hyperv/vmbus/hyperv_reg.h
new file mode 100644
index 0000000..0987adc
--- /dev/null
+++ b/bsd/sys/dev/hyperv/vmbus/hyperv_reg.h
@@ -0,0 +1,193 @@
+/*-
+ * Copyright (c) 2016 Microsoft Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _HYPERV_REG_H_
+#define _HYPERV_REG_H_
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+/*
+ * Hyper-V Synthetic MSRs
+ */
+
+#define MSR_HV_GUEST_OS_ID              0x40000000
+#define MSR_HV_GUESTID_BUILD_MASK       0xffffULL
+#define MSR_HV_GUESTID_VERSION_MASK     0x0000ffffffff0000ULL
+#define MSR_HV_GUESTID_VERSION_SHIFT    16
+#define MSR_HV_GUESTID_OSID_MASK        0x00ff000000000000ULL
+#define MSR_HV_GUESTID_OSID_SHIFT       48
+#define MSR_HV_GUESTID_OSTYPE_MASK      0x7f00000000000000ULL
+#define MSR_HV_GUESTID_OSTYPE_SHIFT     56
+#define MSR_HV_GUESTID_OPENSRC          0x8000000000000000ULL
+#define MSR_HV_GUESTID_OSTYPE_LINUX     \
+    ((0x01ULL << MSR_HV_GUESTID_OSTYPE_SHIFT) | MSR_HV_GUESTID_OPENSRC)
+#define MSR_HV_GUESTID_OSTYPE_FREEBSD   \
+    ((0x02ULL << MSR_HV_GUESTID_OSTYPE_SHIFT) | MSR_HV_GUESTID_OPENSRC)
+
+#define MSR_HV_HYPERCALL                0x40000001
+#define MSR_HV_HYPERCALL_ENABLE         0x0001ULL
+#define MSR_HV_HYPERCALL_RSVD_MASK      0x0ffeULL
+#define MSR_HV_HYPERCALL_PGSHIFT        12
+
+#define MSR_HV_VP_INDEX                 0x40000002
+
+#define MSR_HV_REFERENCE_TSC            0x40000021
+#define MSR_HV_REFTSC_ENABLE            0x0001ULL
+#define MSR_HV_REFTSC_RSVD_MASK         0x0ffeULL
+#define MSR_HV_REFTSC_PGSHIFT           12
+
+#define MSR_HV_SCONTROL                 0x40000080
+#define MSR_HV_SCTRL_ENABLE             0x0001ULL
+#define MSR_HV_SCTRL_RSVD_MASK          0xfffffffffffffffeULL
+
+#define MSR_HV_SIEFP                    0x40000082
+#define MSR_HV_SIEFP_ENABLE             0x0001ULL
+#define MSR_HV_SIEFP_RSVD_MASK          0x0ffeULL
+#define MSR_HV_SIEFP_PGSHIFT            12
+
+#define MSR_HV_SIMP                     0x40000083
+#define MSR_HV_SIMP_ENABLE              0x0001ULL
+#define MSR_HV_SIMP_RSVD_MASK           0x0ffeULL
+#define MSR_HV_SIMP_PGSHIFT             12
+
+#define MSR_HV_EOM                      0x40000084
+
+#define MSR_HV_SINT0                    0x40000090
+#define MSR_HV_SINT_VECTOR_MASK         0x00ffULL
+#define MSR_HV_SINT_RSVD1_MASK          0xff00ULL
+#define MSR_HV_SINT_MASKED              0x00010000ULL
+#define MSR_HV_SINT_AUTOEOI             0x00020000ULL
+#define MSR_HV_SINT_RSVD2_MASK          0xfffffffffffc0000ULL
+#define MSR_HV_SINT_RSVD_MASK           (MSR_HV_SINT_RSVD1_MASK |       \
+                     MSR_HV_SINT_RSVD2_MASK)
+
+#define MSR_HV_STIMER0_CONFIG           0x400000b0
+#define MSR_HV_STIMER_CFG_ENABLE        0x0001ULL
+#define MSR_HV_STIMER_CFG_PERIODIC      0x0002ULL
+#define MSR_HV_STIMER_CFG_LAZY          0x0004ULL
+#define MSR_HV_STIMER_CFG_AUTOEN        0x0008ULL
+#define MSR_HV_STIMER_CFG_SINT_MASK     0x000f0000ULL
+#define MSR_HV_STIMER_CFG_SINT_SHIFT    16
+
+#define MSR_HV_STIMER0_COUNT            0x400000b1
+
+/*
+ * CPUID leaves
+ */
+
+#define CPUID_LEAF_HV_MAXLEAF           0x40000000
+
+#define CPUID_LEAF_HV_INTERFACE         0x40000001
+#define CPUID_HV_IFACE_HYPERV           0x31237648      /* HV#1 */
+
+#define CPUID_LEAF_HV_IDENTITY          0x40000002
+
+#define CPUID_LEAF_HV_FEATURES          0x40000003
+/* EAX: features include/hyperv.h CPUID_HV_MSR */
+/* ECX: power management features */
+#define CPUPM_HV_CSTATE_MASK            0x000f  /* deepest C-state */
+#define CPUPM_HV_C3_HPET                0x0010  /* C3 requires HPET */
+#define CPUPM_HV_CSTATE(f)              ((f) & CPUPM_HV_CSTATE_MASK)
+/* EDX: features3 */
+#define CPUID3_HV_MWAIT                 0x0001  /* MWAIT */
+#define CPUID3_HV_XMM_HYPERCALL         0x0010  /* Hypercall input through
+                         * XMM regs */
+#define CPUID3_HV_GUEST_IDLE            0x0020  /* guest idle */
+#define CPUID3_HV_NUMA                  0x0080  /* NUMA distance query */
+#define CPUID3_HV_TIME_FREQ             0x0100  /* timer frequency query
+                         * (TSC, LAPIC) */
+#define CPUID3_HV_MSR_CRASH             0x0400  /* MSRs for guest crash */
+
+#define CPUID_LEAF_HV_RECOMMENDS        0x40000004
+#define CPUID_LEAF_HV_LIMITS            0x40000005
+#define CPUID_LEAF_HV_HWFEATURES        0x40000006
+
+/*
+ * Hyper-V Monitor Notification Facility
+ */
+struct hyperv_mon_param {
+    uint32_t    mp_connid;
+    uint16_t    mp_evtflag_ofs;
+    uint16_t    mp_rsvd;
+} __packed;
+
+/*
+ * Hyper-V message types
+ */
+#define HYPERV_MSGTYPE_NONE             0
+#define HYPERV_MSGTYPE_CHANNEL          1
+#define HYPERV_MSGTYPE_TIMER_EXPIRED    0x80000010
+
+/*
+ * Hypercall status codes
+ */
+#define HYPERCALL_STATUS_SUCCESS        0x0000
+
+/*
+ * Hypercall input values
+ */
+#define HYPERCALL_POST_MESSAGE          0x005c
+#define HYPERCALL_SIGNAL_EVENT          0x005d
+
+/*
+ * Hypercall input parameters
+ */
+#define HYPERCALL_PARAM_ALIGN           8
+#if 0
+/*
+ * XXX
+ * <<Hypervisor Top Level Functional Specification 4.0b>> requires
+ * input parameters size to be multiple of 8, however, many post
+ * message input parameters do _not_ meet this requirement.
+ */
+#define HYPERCALL_PARAM_SIZE_ALIGN      8
+#endif
+
+/*
+ * HYPERCALL_POST_MESSAGE
+ */
+#define HYPERCALL_POSTMSGIN_DSIZE_MAX   240
+#define HYPERCALL_POSTMSGIN_SIZE        256
+
+struct hypercall_postmsg_in {
+    uint32_t    hc_connid;
+    uint32_t    hc_rsvd;
+    uint32_t    hc_msgtype;     /* HYPERV_MSGTYPE_ */
+    uint32_t    hc_dsize;
+    uint8_t             hc_data[HYPERCALL_POSTMSGIN_DSIZE_MAX];
+} __packed;
+CTASSERT(sizeof(struct hypercall_postmsg_in) == HYPERCALL_POSTMSGIN_SIZE);
+
+/*
+ * HYPERCALL_SIGNAL_EVENT
+ *
+ * struct hyperv_mon_param.
+ */
+
+#endif  /* !_HYPERV_REG_H_ */
-- 
2.7.4

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