| /* |
| * KVM-based ITS implementation for a GICv3-based system |
| * |
| * Copyright (c) 2015 Samsung Electronics Co., Ltd. |
| * Written by Pavel Fedin <p.fedin@samsung.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "hw/intc/arm_gicv3_its_common.h" |
| #include "sysemu/sysemu.h" |
| #include "sysemu/kvm.h" |
| #include "kvm_arm.h" |
| #include "migration/migration.h" |
| |
| #define TYPE_KVM_ARM_ITS "arm-its-kvm" |
| #define KVM_ARM_ITS(obj) OBJECT_CHECK(GICv3ITSState, (obj), TYPE_KVM_ARM_ITS) |
| |
| static int kvm_its_send_msi(GICv3ITSState *s, uint32_t value, uint16_t devid) |
| { |
| struct kvm_msi msi; |
| |
| if (unlikely(!s->translater_gpa_known)) { |
| MemoryRegion *mr = &s->iomem_its_translation; |
| MemoryRegionSection mrs; |
| |
| mrs = memory_region_find(mr, 0, 1); |
| memory_region_unref(mrs.mr); |
| s->gits_translater_gpa = mrs.offset_within_address_space + 0x40; |
| s->translater_gpa_known = true; |
| } |
| |
| msi.address_lo = extract64(s->gits_translater_gpa, 0, 32); |
| msi.address_hi = extract64(s->gits_translater_gpa, 32, 32); |
| msi.data = le32_to_cpu(value); |
| msi.flags = KVM_MSI_VALID_DEVID; |
| msi.devid = devid; |
| memset(msi.pad, 0, sizeof(msi.pad)); |
| |
| return kvm_vm_ioctl(kvm_state, KVM_SIGNAL_MSI, &msi); |
| } |
| |
| static void kvm_arm_its_realize(DeviceState *dev, Error **errp) |
| { |
| GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev); |
| Error *local_err = NULL; |
| |
| /* |
| * Block migration of a KVM GICv3 ITS device: the API for saving and |
| * restoring the state in the kernel is not yet available |
| */ |
| error_setg(&s->migration_blocker, "vITS 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; |
| } |
| |
| 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); |
| |
| /* 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); |
| |
| kvm_msi_use_devid = true; |
| kvm_gsi_direct_mapping = false; |
| kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled(); |
| } |
| |
| static void kvm_arm_its_init(Object *obj) |
| { |
| GICv3ITSState *s = KVM_ARM_ITS(obj); |
| |
| object_property_add_link(obj, "parent-gicv3", |
| "kvm-arm-gicv3", (Object **)&s->gicv3, |
| object_property_allow_set_link, |
| OBJ_PROP_LINK_UNREF_ON_RELEASE, |
| &error_abort); |
| } |
| |
| static void kvm_arm_its_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass); |
| |
| dc->realize = kvm_arm_its_realize; |
| icc->send_msi = kvm_its_send_msi; |
| } |
| |
| static const TypeInfo kvm_arm_its_info = { |
| .name = TYPE_KVM_ARM_ITS, |
| .parent = TYPE_ARM_GICV3_ITS_COMMON, |
| .instance_size = sizeof(GICv3ITSState), |
| .instance_init = kvm_arm_its_init, |
| .class_init = kvm_arm_its_class_init, |
| }; |
| |
| static void kvm_arm_its_register_types(void) |
| { |
| type_register_static(&kvm_arm_its_info); |
| } |
| |
| type_init(kvm_arm_its_register_types) |