LXR qemu/target-i386/hyperv.c

   1/*
   2 * QEMU KVM Hyper-V support
   3 *
   4 * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
   5 *
   6 * Authors:
   7 *  Andrey Smetanin <asmetanin@virtuozzo.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10 * See the COPYING file in the top-level directory.
  11 *
  12 */
  13
  14#include "qemu/osdep.h"
  15#include "hyperv.h"
  16#include "standard-headers/asm-x86/hyperv.h"
  17
  18int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
  19{
  20    CPUX86State *env = &cpu->env;
  21
  22    switch (exit->type) {
  23    case KVM_EXIT_HYPERV_SYNIC:
  24        if (!cpu->hyperv_synic) {
  25            return -1;
  26        }
  27
  28        /*
  29         * For now just track changes in SynIC control and msg/evt pages msr's.
  30         * When SynIC messaging/events processing will be added in future
  31         * here we will do messages queues flushing and pages remapping.
  32         */
  33        switch (exit->u.synic.msr) {
  34        case HV_X64_MSR_SCONTROL:
  35            env->msr_hv_synic_control = exit->u.synic.control;
  36            break;
  37        case HV_X64_MSR_SIMP:
  38            env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
  39            break;
  40        case HV_X64_MSR_SIEFP:
  41            env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
  42            break;
  43        default:
  44            return -1;
  45        }
  46        return 0;
  47    case KVM_EXIT_HYPERV_HCALL: {
  48        uint16_t code;
  49
  50        code  = exit->u.hcall.input & 0xffff;
  51        switch (code) {
  52        case HVCALL_POST_MESSAGE:
  53        case HVCALL_SIGNAL_EVENT:
  54        default:
  55            exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
  56            return 0;
  57        }
  58    }
  59    default:
  60        return -1;
  61    }
  62}
  63
  64static void kvm_hv_sint_ack_handler(EventNotifier *notifier)
  65{
  66    HvSintRoute *sint_route = container_of(notifier, HvSintRoute,
  67                                           sint_ack_notifier);
  68    event_notifier_test_and_clear(notifier);
  69    if (sint_route->sint_ack_clb) {
  70        sint_route->sint_ack_clb(sint_route);
  71    }
  72}
  73
  74HvSintRoute *kvm_hv_sint_route_create(uint32_t vcpu_id, uint32_t sint,
  75                                      HvSintAckClb sint_ack_clb)
  76{
  77    HvSintRoute *sint_route;
  78    int r, gsi;
  79
  80    sint_route = g_malloc0(sizeof(*sint_route));
  81    r = event_notifier_init(&sint_route->sint_set_notifier, false);
  82    if (r) {
  83        goto err;
  84    }
  85
  86    r = event_notifier_init(&sint_route->sint_ack_notifier, false);
  87    if (r) {
  88        goto err_sint_set_notifier;
  89    }
  90
  91    event_notifier_set_handler(&sint_route->sint_ack_notifier, false,
  92                               kvm_hv_sint_ack_handler);
  93
  94    gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vcpu_id, sint);
  95    if (gsi < 0) {
  96        goto err_gsi;
  97    }
  98
  99    r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state,
 100                                           &sint_route->sint_set_notifier,
 101                                           &sint_route->sint_ack_notifier, gsi);
 102    if (r) {
 103        goto err_irqfd;
 104    }
 105    sint_route->gsi = gsi;
 106    sint_route->sint_ack_clb = sint_ack_clb;
 107    sint_route->vcpu_id = vcpu_id;
 108    sint_route->sint = sint;
 109
 110    return sint_route;
 111
 112err_irqfd:
 113    kvm_irqchip_release_virq(kvm_state, gsi);
 114err_gsi:
 115    event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
 116    event_notifier_cleanup(&sint_route->sint_ack_notifier);
 117err_sint_set_notifier:
 118    event_notifier_cleanup(&sint_route->sint_set_notifier);
 119err:
 120    g_free(sint_route);
 121
 122    return NULL;
 123}
 124
 125void kvm_hv_sint_route_destroy(HvSintRoute *sint_route)
 126{
 127    kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state,
 128                                          &sint_route->sint_set_notifier,
 129                                          sint_route->gsi);
 130    kvm_irqchip_release_virq(kvm_state, sint_route->gsi);
 131    event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
 132    event_notifier_cleanup(&sint_route->sint_ack_notifier);
 133    event_notifier_cleanup(&sint_route->sint_set_notifier);
 134    g_free(sint_route);
 135}
 136
 137int kvm_hv_sint_route_set_sint(HvSintRoute *sint_route)
 138{
 139    return event_notifier_set(&sint_route->sint_set_notifier);
 140}
 141