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fe44dc9180
If a migration is already in progress and somebody attempts to add a migration blocker, this should rightly fail. Add an errp parameter and a retcode return value to migrate_add_blocker. Signed-off-by: John Snow <jsnow@redhat.com> Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com> Message-Id: <1484566314-3987-5-git-send-email-ashijeetacharya@gmail.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Acked-by: Greg Kurz <groug@kaod.org> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Merged with recent 'Allow invtsc migration' change
128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/*
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* KVM-based ITS implementation for a GICv3-based system
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*
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* Copyright (c) 2015 Samsung Electronics Co., Ltd.
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* Written by Pavel Fedin <p.fedin@samsung.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/intc/arm_gicv3_its_common.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/kvm.h"
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#include "kvm_arm.h"
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#include "migration/migration.h"
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#define TYPE_KVM_ARM_ITS "arm-its-kvm"
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#define KVM_ARM_ITS(obj) OBJECT_CHECK(GICv3ITSState, (obj), TYPE_KVM_ARM_ITS)
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static int kvm_its_send_msi(GICv3ITSState *s, uint32_t value, uint16_t devid)
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{
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struct kvm_msi msi;
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if (unlikely(!s->translater_gpa_known)) {
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MemoryRegion *mr = &s->iomem_its_translation;
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MemoryRegionSection mrs;
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mrs = memory_region_find(mr, 0, 1);
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memory_region_unref(mrs.mr);
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s->gits_translater_gpa = mrs.offset_within_address_space + 0x40;
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s->translater_gpa_known = true;
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}
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msi.address_lo = extract64(s->gits_translater_gpa, 0, 32);
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msi.address_hi = extract64(s->gits_translater_gpa, 32, 32);
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msi.data = le32_to_cpu(value);
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msi.flags = KVM_MSI_VALID_DEVID;
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msi.devid = devid;
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memset(msi.pad, 0, sizeof(msi.pad));
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return kvm_vm_ioctl(kvm_state, KVM_SIGNAL_MSI, &msi);
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}
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static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
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{
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GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
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Error *local_err = NULL;
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/*
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* Block migration of a KVM GICv3 ITS device: the API for saving and
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* restoring the state in the kernel is not yet available
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*/
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error_setg(&s->migration_blocker, "vITS migration is not implemented");
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migrate_add_blocker(s->migration_blocker, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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error_free(s->migration_blocker);
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return;
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}
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s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
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if (s->dev_fd < 0) {
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error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS");
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return;
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}
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/* explicit init of the ITS */
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kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
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KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
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/* register the base address */
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kvm_arm_register_device(&s->iomem_its_cntrl, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
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KVM_VGIC_ITS_ADDR_TYPE, s->dev_fd);
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gicv3_its_init_mmio(s, NULL);
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kvm_msi_use_devid = true;
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kvm_gsi_direct_mapping = false;
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kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
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}
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static void kvm_arm_its_init(Object *obj)
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{
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GICv3ITSState *s = KVM_ARM_ITS(obj);
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object_property_add_link(obj, "parent-gicv3",
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"kvm-arm-gicv3", (Object **)&s->gicv3,
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object_property_allow_set_link,
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OBJ_PROP_LINK_UNREF_ON_RELEASE,
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&error_abort);
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}
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static void kvm_arm_its_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass);
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dc->realize = kvm_arm_its_realize;
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icc->send_msi = kvm_its_send_msi;
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}
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static const TypeInfo kvm_arm_its_info = {
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.name = TYPE_KVM_ARM_ITS,
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.parent = TYPE_ARM_GICV3_ITS_COMMON,
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.instance_size = sizeof(GICv3ITSState),
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.instance_init = kvm_arm_its_init,
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.class_init = kvm_arm_its_class_init,
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};
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static void kvm_arm_its_register_types(void)
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{
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type_register_static(&kvm_arm_its_info);
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}
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type_init(kvm_arm_its_register_types)
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