static int kvm_init_irq_routing(KVMState *s)
{
#ifdef KVM_CAP_IRQ_ROUTING
int r, gsi_count;
gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING);
if (gsi_count > 0) {
int gsi_bits, i;
/* Round up so we can search ints using ffs */
gsi_bits = ALIGN(gsi_count, 32);
s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
s->max_gsi = gsi_bits;
/* Mark any over-allocated bits as already in use */
for (i = gsi_count; i < gsi_bits; i++) {
set_gsi(s, i);
}
}
s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
s->nr_allocated_irq_routes = 0;
r = kvm_arch_init_irq_routing();
if (r < 0) {
return r;
}
#endif
return 0;
}
static void kvm_init_irq_routing(KVMState *s)
{
int gsi_count;
gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING);
if (gsi_count > 0) {
unsigned int gsi_bits, i;
/* Round up so we can search ints using ffs */
gsi_bits = (gsi_count + 31) / 32;
s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
s->max_gsi = gsi_bits;
/* Mark any over-allocated bits as already in use */
for (i = gsi_count; i < gsi_bits; i++) {
set_gsi(s, i);
}
}
s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
s->nr_allocated_irq_routes = 0;
kvm_arch_init_irq_routing(s);
}
int kvm_init(void)
{
int fd;
int r, gsi_count;
fd = open("/dev/kvm", O_RDWR);
if (fd == -1) {
perror("open /dev/kvm");
return -1;
}
r = ioctl(fd, KVM_GET_API_VERSION, 0);
if (r == -1) {
fprintf(stderr,
"kvm kernel version too old: "
"KVM_GET_API_VERSION ioctl not supported\n");
goto out_close;
}
if (r < EXPECTED_KVM_API_VERSION) {
fprintf(stderr, "kvm kernel version too old: "
"We expect API version %d or newer, but got "
"version %d\n", EXPECTED_KVM_API_VERSION, r);
goto out_close;
}
if (r > EXPECTED_KVM_API_VERSION) {
fprintf(stderr, "kvm userspace version too old\n");
goto out_close;
}
kvm_abi = r;
kvm_page_size = getpagesize();
kvm_state = qemu_mallocz(sizeof(*kvm_state));
kvm_context = &kvm_state->kvm_context;
kvm_state->fd = fd;
kvm_state->vmfd = -1;
kvm_context->opaque = cpu_single_env;
kvm_context->dirty_pages_log_all = 0;
kvm_context->no_irqchip_creation = 0;
kvm_context->no_pit_creation = 0;
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&kvm_state->kvm_sw_breakpoints);
#endif
gsi_count = kvm_get_gsi_count(kvm_context);
if (gsi_count > 0) {
int gsi_bits, i;
/* Round up so we can search ints using ffs */
gsi_bits = ALIGN(gsi_count, 32);
kvm_context->used_gsi_bitmap = qemu_mallocz(gsi_bits / 8);
kvm_context->max_gsi = gsi_bits;
/* Mark any over-allocated bits as already in use */
for (i = gsi_count; i < gsi_bits; i++) {
set_gsi(kvm_context, i);
}
}
kvm_cpu_register_phys_memory_client();
pthread_mutex_lock(&qemu_mutex);
return kvm_create_context();
out_close:
close(fd);
return -1;
}