target/i386/kvm/hyperv-stub.c

   1 /*
   2  * Stubs for CONFIG_HYPERV=n
   3  *
   4  * Copyright (c) 2015-2018 Virtuozzo International GmbH.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "hyperv.h"
  12
  13 #ifdef CONFIG_KVM
  14 int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
  15 {
  16     switch (exit->type) {
  17     case KVM_EXIT_HYPERV_SYNIC:
  18         if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) {
  19             return -1;
  20         }
  21
  22         /*
  23          * Tracking the changes in the MSRs is unnecessary as there are no
  24          * users for them beside save/load, which is handled nicely by the
  25          * generic MSR save/load code
  26          */
  27         return 0;
  28     case KVM_EXIT_HYPERV_HCALL:
  29         exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
  30         return 0;
  31     case KVM_EXIT_HYPERV_SYNDBG:
  32         if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) {
  33             return -1;
  34         }
  35
  36         return 0;
  37     default:
  38         return -1;
  39     }
  40 }
  41 #endif
  42
  43 int hyperv_x86_synic_add(X86CPU *cpu)
  44 {
  45     return -ENOSYS;
  46 }
  47
  48 void hyperv_x86_synic_reset(X86CPU *cpu)
  49 {
  50 }
  51
  52 void hyperv_x86_synic_update(X86CPU *cpu)
  53 {
  54 }
  55
  56 void hyperv_x86_set_vmbus_recommended_features_enabled(void)
  57 {
  58 }