@@ -22,6 +22,7 @@ common-obj-$(CONFIG_OPENPIC) += openpic.o
obj-$(CONFIG_APIC) += apic.o apic_common.o
obj-$(CONFIG_ARM_GIC_KVM) += arm_gic_kvm.o
obj-$(call land,$(CONFIG_ARM_GIC_KVM),$(TARGET_AARCH64)) += arm_gicv3_kvm.o
+obj-$(call land,$(CONFIG_ARM_GIC_KVM),$(TARGET_AARCH64)) += arm_gicv3_its_kvm.o
obj-$(CONFIG_STELLARIS) += armv7m_nvic.o
obj-$(CONFIG_EXYNOS4) += exynos4210_gic.o exynos4210_combiner.o
obj-$(CONFIG_GRLIB) += grlib_irqmp.o
new file mode 100644
@@ -0,0 +1,145 @@
+/*
+ * 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"
+
+#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;
+
+ msi.address_lo = s->gits_translater_gpa & 0xFFFFFFFFULL;
+ msi.address_hi = s->gits_translater_gpa >> 32;
+ msi.data = 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);
+}
+
+typedef struct ItsInitNotifierParams {
+ Notifier notifier;
+ GICv3ITSState *s;
+} ItsInitNotifierParams;
+
+/**
+ *
+ * We currently do not use kvm_arm_register_device to provide
+ * the kernel with the vITS control frame base address since the
+ * KVM_DEV_ARM_VGIC_CTRL_INIT init MUST be called after the
+ * KVM_ARM_SET_DEVICE_ADDR and the kvm_arm_register_device
+ * infra does not allow this.
+ */
+static void its_notify(Notifier *notifier, void *data)
+{
+ ItsInitNotifierParams *p = DO_UPCAST(ItsInitNotifierParams,
+ notifier, notifier);
+ GICv3ITSState *s = p->s;
+ MemoryRegion *mr = &s->iomem_its_cntrl;
+ MemoryRegionSection mrs;
+ struct kvm_device_attr attr;
+ uint64_t addr;
+ int ret;
+
+ mrs = memory_region_find(mr, 0, 1);
+ addr = mrs.offset_within_address_space;
+
+ attr.flags = 0;
+ attr.group = KVM_DEV_ARM_VGIC_GRP_ADDR;
+ attr.attr = KVM_VGIC_ITS_ADDR_TYPE;
+ attr.addr = (uintptr_t)&addr;
+
+ s->gits_translater_gpa = addr + ITS_CONTROL_SIZE + 0x40;
+
+ ret = kvm_device_ioctl(s->dev_fd, KVM_SET_DEVICE_ATTR, attr);
+ if (ret) {
+ error_setg_errno(&error_fatal, -ret,
+ "not able to set base address for vITS ctrl frame");
+ }
+
+ kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
+}
+
+static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
+{
+ GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
+ ItsInitNotifierParams *p = g_new(ItsInitNotifierParams, 1);
+
+ 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;
+ }
+
+ gicv3_its_init_mmio(s, NULL);
+
+ p->notifier.notify = its_notify;
+ p->s = s;
+ qemu_add_machine_init_done_notifier(&p->notifier);
+
+ kvm_arm_msi_use_devid = true;
+ kvm_gsi_routing_allowed = kvm_has_gsi_routing();
+ 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)