static int kvm_msix_add(PCIDevice *dev, unsigned vector)
{
struct kvm_irq_routing_entry *entry = dev->msix_irq_entries + vector;
int r;
if (!kvm_has_gsi_routing(kvm_context)) {
fprintf(stderr, "Warning: no MSI-X support found. "
"At least kernel 2.6.30 is required for MSI-X support.\n"
);
return -EOPNOTSUPP;
}
r = kvm_get_irq_route_gsi(kvm_context);
if (r < 0) {
fprintf(stderr, "%s: kvm_get_irq_route_gsi failed: %s\n", __func__, strerror(-r));
return r;
}
entry->gsi = r;
kvm_msix_routing_entry(dev, vector, entry);
r = kvm_add_routing_entry(kvm_context, entry);
if (r < 0) {
fprintf(stderr, "%s: kvm_add_routing_entry failed: %s\n", __func__, strerror(-r));
return r;
}
r = kvm_commit_irq_routes(kvm_context);
if (r < 0) {
fprintf(stderr, "%s: kvm_commit_irq_routes failed: %s\n", __func__, strerror(-r));
return r;
}
return 0;
}
/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is
* modified, it should be retrieved with msix_bar_size. */
int msix_init(struct PCIDevice *dev, unsigned short nentries,
MemoryRegion *bar,
unsigned bar_nr, unsigned bar_size)
{
int ret;
/* Nothing to do if MSI is not supported by interrupt controller */
if (!msix_supported ||
(kvm_enabled() && kvm_irqchip_in_kernel() && !kvm_has_gsi_routing())) {
return -ENOTSUP;
}
if (nentries > MSIX_MAX_ENTRIES)
return -EINVAL;
dev->msix_mask_notifier = NULL;
dev->msix_entry_used = g_malloc0(MSIX_MAX_ENTRIES *
sizeof *dev->msix_entry_used);
dev->msix_table_page = g_malloc0(MSIX_PAGE_SIZE);
msix_mask_all(dev, nentries);
memory_region_init_io(&dev->msix_mmio, &msix_mmio_ops, dev,
"msix", MSIX_PAGE_SIZE);
dev->msix_entries_nr = nentries;
ret = msix_add_config(dev, nentries, bar_nr, bar_size);
if (ret)
goto err_config;
if (kvm_enabled() && kvm_irqchip_in_kernel()) {
dev->msix_irq_entries = g_malloc(nentries *
sizeof *dev->msix_irq_entries);
}
dev->cap_present |= QEMU_PCI_CAP_MSIX;
msix_mmio_setup(dev, bar);
return 0;
err_config:
dev->msix_entries_nr = 0;
memory_region_destroy(&dev->msix_mmio);
g_free(dev->msix_table_page);
dev->msix_table_page = NULL;
g_free(dev->msix_entry_used);
dev->msix_entry_used = NULL;
return ret;
}
static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
{
GICv3State *s = KVM_ARM_GICV3(dev);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s);
Error *local_err = NULL;
int i;
DPRINTF("kvm_arm_gicv3_realize\n");
kgc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (s->security_extn) {
error_setg(errp, "the in-kernel VGICv3 does not implement the "
"security extensions");
return;
}
gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL);
/* Block migration of a KVM GICv3 device: the API for saving and restoring
* the state in the kernel is not yet finalised in the kernel or
* implemented in QEMU.
*/
error_setg(&s->migration_blocker, "vGICv3 migration is not implemented");
migrate_add_blocker(s->migration_blocker, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_free(s->migration_blocker);
return;
}
/* Try to create the device via the device control API */
s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false);
if (s->dev_fd < 0) {
error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC");
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS,
0, &s->num_irq, true);
/* Tell the kernel to complete VGIC initialization now */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd);
kvm_arm_register_device(&s->iomem_redist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd);
if (kvm_has_gsi_routing()) {
/* set up irq routing */
kvm_init_irq_routing(kvm_state);
for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) {
kvm_irqchip_add_irq_route(kvm_state, i, 0, i);
}
kvm_gsi_routing_allowed = true;
kvm_irqchip_commit_routes(kvm_state);
}
}