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