cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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hyperv-stub.c (1059B)

      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
     14int 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    default:
     32        return -1;
     33    }
     34}
     35#endif
     36
     37int hyperv_x86_synic_add(X86CPU *cpu)
     38{
     39    return -ENOSYS;
     40}
     41
     42void hyperv_x86_synic_reset(X86CPU *cpu)
     43{
     44}
     45
     46void hyperv_x86_synic_update(X86CPU *cpu)
     47{
     48}