141 lines
4.0 KiB
C
141 lines
4.0 KiB
C
/*
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* QEMU KVM Hyper-V support
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*
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* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* Authors:
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* Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "hyperv.h"
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#include "standard-headers/asm-x86/hyperv.h"
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int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
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{
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CPUX86State *env = &cpu->env;
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switch (exit->type) {
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case KVM_EXIT_HYPERV_SYNIC:
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if (!cpu->hyperv_synic) {
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return -1;
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}
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/*
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* For now just track changes in SynIC control and msg/evt pages msr's.
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* When SynIC messaging/events processing will be added in future
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* here we will do messages queues flushing and pages remapping.
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*/
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switch (exit->u.synic.msr) {
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case HV_X64_MSR_SCONTROL:
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env->msr_hv_synic_control = exit->u.synic.control;
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break;
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case HV_X64_MSR_SIMP:
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env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
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break;
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case HV_X64_MSR_SIEFP:
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env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
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break;
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default:
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return -1;
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}
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return 0;
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case KVM_EXIT_HYPERV_HCALL: {
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uint16_t code;
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code = exit->u.hcall.input & 0xffff;
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switch (code) {
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case HVCALL_POST_MESSAGE:
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case HVCALL_SIGNAL_EVENT:
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default:
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exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
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return 0;
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}
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}
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default:
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return -1;
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}
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}
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static void kvm_hv_sint_ack_handler(EventNotifier *notifier)
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{
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HvSintRoute *sint_route = container_of(notifier, HvSintRoute,
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sint_ack_notifier);
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event_notifier_test_and_clear(notifier);
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if (sint_route->sint_ack_clb) {
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sint_route->sint_ack_clb(sint_route);
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}
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}
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HvSintRoute *kvm_hv_sint_route_create(uint32_t vcpu_id, uint32_t sint,
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HvSintAckClb sint_ack_clb)
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{
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HvSintRoute *sint_route;
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int r, gsi;
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sint_route = g_malloc0(sizeof(*sint_route));
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r = event_notifier_init(&sint_route->sint_set_notifier, false);
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if (r) {
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goto err;
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}
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r = event_notifier_init(&sint_route->sint_ack_notifier, false);
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if (r) {
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goto err_sint_set_notifier;
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}
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event_notifier_set_handler(&sint_route->sint_ack_notifier, false,
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kvm_hv_sint_ack_handler);
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gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vcpu_id, sint);
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if (gsi < 0) {
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goto err_gsi;
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}
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r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state,
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&sint_route->sint_set_notifier,
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&sint_route->sint_ack_notifier, gsi);
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if (r) {
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goto err_irqfd;
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}
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sint_route->gsi = gsi;
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sint_route->sint_ack_clb = sint_ack_clb;
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sint_route->vcpu_id = vcpu_id;
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sint_route->sint = sint;
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return sint_route;
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err_irqfd:
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kvm_irqchip_release_virq(kvm_state, gsi);
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err_gsi:
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event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
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event_notifier_cleanup(&sint_route->sint_ack_notifier);
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err_sint_set_notifier:
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event_notifier_cleanup(&sint_route->sint_set_notifier);
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err:
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g_free(sint_route);
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return NULL;
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}
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void kvm_hv_sint_route_destroy(HvSintRoute *sint_route)
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{
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kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state,
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&sint_route->sint_set_notifier,
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sint_route->gsi);
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kvm_irqchip_release_virq(kvm_state, sint_route->gsi);
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event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
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event_notifier_cleanup(&sint_route->sint_ack_notifier);
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event_notifier_cleanup(&sint_route->sint_set_notifier);
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g_free(sint_route);
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}
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int kvm_hv_sint_route_set_sint(HvSintRoute *sint_route)
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{
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return event_notifier_set(&sint_route->sint_set_notifier);
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}
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