sys/dev/virtual/hyperv/vmbus/x86_64/hyperv_machdep.c

   1 /*-
   2  * Copyright (c) 2016 Microsoft Corp.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <sys/param.h>
  28 #include <machine/msi_machdep.h>
  29 #include <dev/virtual/hyperv/vmbus/hyperv_machdep.h>
  30
  31 uint64_t
  32 hypercall_md(volatile void *hc_addr, uint64_t in_val,
  33     uint64_t in_paddr, uint64_t out_paddr)
  34 {
  35         uint64_t status;
  36
  37         __asm__ __volatile__ ("mov %0, %%r8" : : "r" (out_paddr): "r8");
  38         __asm__ __volatile__ ("call *%3" : "=a" (status) :
  39             "c" (in_val), "d" (in_paddr), "m" (hc_addr));
  40         return (status);
  41 }
  42
  43 int
  44 hyperv_msi2vector(uint64_t msi_addr __unused, uint32_t msi_data)
  45 {
  46         return (msi_data & MSI_X86_DATA_INTVEC);
  47 }