static void kvm_arm_its_reset(DeviceState *dev)
{
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
KVMARMITSClass *c = KVM_ARM_ITS_GET_CLASS(s);
int i;
c->parent_reset(dev);
if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_CTRL_RESET)) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, &error_abort);
return;
}
error_report("ITS KVM: full reset is not supported by the host kernel");
if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR)) {
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR, &s->ctlr, true, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER, &s->cbaser, true, &error_abort);
for (i = 0; i < 8; i++) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8, &s->baser[i], true,
&error_abort);
}
}
/**
* kvm_arm_its_post_load - Restore both the ITS registers and tables
*/
static void kvm_arm_its_post_load(GICv3ITSState *s)
{
int i;
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR, &s->iidr, true, &error_abort);
/*
* must be written before GITS_CREADR since GITS_CBASER write
* access resets GITS_CREADR.
*/
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER, &s->cbaser, true, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR, &s->creadr, true, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER, &s->cwriter, true, &error_abort);
for (i = 0; i < 8; i++) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8, &s->baser[i], true,
&error_abort);
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_RESTORE_TABLES, NULL, true,
&error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR, &s->ctlr, true, &error_abort);
}
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;
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);
/* 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);
}
/**
* kvm_arm_its_pre_save - handles the saving of ITS registers.
* ITS tables are flushed into guest RAM separately and earlier,
* through the VM change state handler, since at the moment pre_save()
* is called, the guest RAM has already been saved.
*/
static void kvm_arm_its_pre_save(GICv3ITSState *s)
{
int i;
for (i = 0; i < 8; i++) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8, &s->baser[i], false,
&error_abort);
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR, &s->ctlr, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER, &s->cbaser, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR, &s->creadr, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER, &s->cwriter, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR, &s->iidr, false, &error_abort);
}
/**
* vm_change_state_handler - VM change state callback aiming at flushing
* ITS tables into guest RAM
*
* The tables get flushed to guest RAM whenever the VM gets stopped.
*/
static void vm_change_state_handler(void *opaque, int running,
RunState state)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
Error *err = NULL;
if (running) {
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
if (err) {
error_report_err(err);
}
}
static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
{
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
Error *local_err = NULL;
s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
if (s->dev_fd < 0) {
error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS");
return;
}
/* explicit init of the ITS */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort);
/* register the base address */
kvm_arm_register_device(&s->iomem_its_cntrl, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_ITS_ADDR_TYPE, s->dev_fd);
gicv3_its_init_mmio(s, NULL);
if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR)) {
error_setg(&s->migration_blocker, "This operating system kernel "
"does not support vITS migration");
migrate_add_blocker(s->migration_blocker, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_free(s->migration_blocker);
return;
}
} else {
qemu_add_vm_change_state_handler(vm_change_state_handler, s);
}
kvm_msi_use_devid = true;
kvm_gsi_direct_mapping = false;
kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
}
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);
}
}
static void kvm_gicd_access(GICState *s, int offset, int cpu,
uint32_t *val, bool write)
{
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_DIST_REGS,
KVM_VGIC_ATTR(offset, cpu), val, write);
}