| Message ID | 1473442237-3746-6-git-send-email-eric.auger@redhat.com |
|---|---|
| State | New |
| Headers | show |
On 9 September 2016 at 18:30, Eric Auger <eric.auger@redhat.com> wrote: > From: Pavel Fedin <p.fedin@samsung.com> > > The ITS control frame is in-kernel emulated while accesses to the > GITS_TRANSLATER are mediated through the KVM_SIGNAL_MSI ioctl (MSI > direct MSI injection advertised by the CAP_SIGNAL_MSI capability) > > the kvm_gsi_direct_mapping is explicitly set to false to emphasize the > difference with GICv2M. Direct mapping cannot work with ITS since > the content of the MSI data is not the target interrupt ID but an > eventd id. > > GSI routing is advertised (kvm_gsi_routing_allowed) as well as > msi/irqfd signaling (kvm_msi_via_irqfd_allowed). > > A machine init done notifier still is used to compute the MSI frame > (GITS_TRANSLATER) GPA, which is passed through KVM_SIGNAL_MSI ioctl. > > Signed-off-by: Pavel Fedin <p.fedin@samsung.com> > Signed-off-by: Eric Auger <eric.auger@redhat.com> > > --- > v5 -> v6: > - now the kernel ITS init sequence has changed let's use the > kvm_arm_register_device to set the CTRL frame base address > - use extract64() > - add migration blocker > - remove kvm_gsi_routing_allowed setting which is set in GICv3 > KVM device realize > - add migration_blocker > > v3 -> v4: > - include "qemu/osdep.h" and "qapi/error.h" > - rename KVM_VGIC_V3_ADDR_TYPE_ITS into KVM_VGIC_ITS_ADDR_TYPE > - reword commit message > - change kvm_msi_via_irqfd_allowed definition (attached to irqfd dynamic > availability + MSI controller availability) > - create the ITS KVM device (previously abstracted by the GICv3 KVM device) > - init sequence changed > - absolute GITS_TRANSLATER GPA stored > > Signed-off-by: Eric Auger <eric.auger@redhat.com> > --- > hw/intc/Makefile.objs | 1 + > hw/intc/arm_gicv3_its_kvm.c | 136 ++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 137 insertions(+) > create mode 100644 hw/intc/arm_gicv3_its_kvm.c > > diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs > index 23a39f7..9cca280 100644 > --- a/hw/intc/Makefile.objs > +++ b/hw/intc/Makefile.objs > @@ -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 > diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c > new file mode 100644 > index 0000000..b9d10dc > --- /dev/null > +++ b/hw/intc/arm_gicv3_its_kvm.c > @@ -0,0 +1,136 @@ > +/* > + * 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; > + > + 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); > +} > + > +typedef struct ItsInitNotifierParams { > + Notifier notifier; > + GICv3ITSState *s; > +} ItsInitNotifierParams; > + > +/* this notifier computes and stores the ITS MSI frame GPA */ > +static void its_notify(Notifier *notifier, void *data) > +{ > + ItsInitNotifierParams *p = DO_UPCAST(ItsInitNotifierParams, > + notifier, notifier); > + GICv3ITSState *s = p->s; > + MemoryRegion *mr = &s->iomem_its_translation; > + MemoryRegionSection mrs; > + uint64_t addr; > + > + mrs = memory_region_find(mr, 0, 1); > + addr = mrs.offset_within_address_space; > + s->gits_translater_gpa = addr + 0x40; This leaks a memory region reference. Also, I think it would be simpler to just have kvm_its_send_msi() do if (unlikely(!s->translater_gpa_known)) { s->gits_translater_gpa = ...; s->translater_gpa_known = true; } rather than messing around with a machine-init-done notifier. > +} > + > +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; > + } > + > + /* explicit init if the ITS */ "of the" > + 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); > + > + p->notifier.notify = its_notify; > + p->s = s; > + qemu_add_machine_init_done_notifier(&p->notifier); > + > + /* > + * 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); > + > + 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) > -- > 2.5.5 thanks -- PMM
Hi Peter, On 22/09/2016 17:03, Peter Maydell wrote: > On 9 September 2016 at 18:30, Eric Auger <eric.auger@redhat.com> wrote: >> From: Pavel Fedin <p.fedin@samsung.com> >> >> The ITS control frame is in-kernel emulated while accesses to the >> GITS_TRANSLATER are mediated through the KVM_SIGNAL_MSI ioctl (MSI >> direct MSI injection advertised by the CAP_SIGNAL_MSI capability) >> >> the kvm_gsi_direct_mapping is explicitly set to false to emphasize the >> difference with GICv2M. Direct mapping cannot work with ITS since >> the content of the MSI data is not the target interrupt ID but an >> eventd id. >> >> GSI routing is advertised (kvm_gsi_routing_allowed) as well as >> msi/irqfd signaling (kvm_msi_via_irqfd_allowed). >> >> A machine init done notifier still is used to compute the MSI frame >> (GITS_TRANSLATER) GPA, which is passed through KVM_SIGNAL_MSI ioctl. >> >> Signed-off-by: Pavel Fedin <p.fedin@samsung.com> >> Signed-off-by: Eric Auger <eric.auger@redhat.com> >> >> --- >> v5 -> v6: >> - now the kernel ITS init sequence has changed let's use the >> kvm_arm_register_device to set the CTRL frame base address >> - use extract64() >> - add migration blocker >> - remove kvm_gsi_routing_allowed setting which is set in GICv3 >> KVM device realize >> - add migration_blocker >> >> v3 -> v4: >> - include "qemu/osdep.h" and "qapi/error.h" >> - rename KVM_VGIC_V3_ADDR_TYPE_ITS into KVM_VGIC_ITS_ADDR_TYPE >> - reword commit message >> - change kvm_msi_via_irqfd_allowed definition (attached to irqfd dynamic >> availability + MSI controller availability) >> - create the ITS KVM device (previously abstracted by the GICv3 KVM device) >> - init sequence changed >> - absolute GITS_TRANSLATER GPA stored >> >> Signed-off-by: Eric Auger <eric.auger@redhat.com> >> --- >> hw/intc/Makefile.objs | 1 + >> hw/intc/arm_gicv3_its_kvm.c | 136 ++++++++++++++++++++++++++++++++++++++++++++ >> 2 files changed, 137 insertions(+) >> create mode 100644 hw/intc/arm_gicv3_its_kvm.c >> >> diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs >> index 23a39f7..9cca280 100644 >> --- a/hw/intc/Makefile.objs >> +++ b/hw/intc/Makefile.objs >> @@ -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 >> diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c >> new file mode 100644 >> index 0000000..b9d10dc >> --- /dev/null >> +++ b/hw/intc/arm_gicv3_its_kvm.c >> @@ -0,0 +1,136 @@ >> +/* >> + * 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; >> + >> + 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); >> +} >> + >> +typedef struct ItsInitNotifierParams { >> + Notifier notifier; >> + GICv3ITSState *s; >> +} ItsInitNotifierParams; >> + >> +/* this notifier computes and stores the ITS MSI frame GPA */ >> +static void its_notify(Notifier *notifier, void *data) >> +{ >> + ItsInitNotifierParams *p = DO_UPCAST(ItsInitNotifierParams, >> + notifier, notifier); >> + GICv3ITSState *s = p->s; >> + MemoryRegion *mr = &s->iomem_its_translation; >> + MemoryRegionSection mrs; >> + uint64_t addr; >> + >> + mrs = memory_region_find(mr, 0, 1); >> + addr = mrs.offset_within_address_space; >> + s->gits_translater_gpa = addr + 0x40; > > This leaks a memory region reference. Sure I did not notice memory_region_find is adding a reference. > > Also, I think it would be simpler to just have kvm_its_send_msi() do > > if (unlikely(!s->translater_gpa_known)) { > s->gits_translater_gpa = ...; > s->translater_gpa_known = true; > } My issue precisely is to get the absolue GPA of the ITS translater. kvm_its_send_msi is called by the region write callback which works on relative address wrt start of the translation region while kvm ioctl uses the absolute GPA. I did not see any other way to retrieve the absolute GPA than using a machine init done notifier. > > rather than messing around with a machine-init-done notifier. > >> +} >> + >> +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; >> + } >> + >> + /* explicit init if the ITS */ > > "of the" OK > >> + 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); >> + >> + p->notifier.notify = its_notify; >> + p->s = s; >> + qemu_add_machine_init_done_notifier(&p->notifier); >> + >> + /* >> + * 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); >> + >> + 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) >> -- >> 2.5.5 Thank you for your time Best Regards Eric > > thanks > -- PMM >
On 22 September 2016 at 16:53, Auger Eric <eric.auger@redhat.com> wrote: > Hi Peter, > > On 22/09/2016 17:03, Peter Maydell wrote: >> Also, I think it would be simpler to just have kvm_its_send_msi() do >> >> if (unlikely(!s->translater_gpa_known)) { >> s->gits_translater_gpa = ...; >> s->translater_gpa_known = true; >> } > My issue precisely is to get the absolue GPA of the ITS translater. > kvm_its_send_msi is called by the region write callback which works on > relative address wrt start of the translation region while kvm ioctl > uses the absolute GPA. I did not see any other way to retrieve the > absolute GPA than using a machine init done notifier. I don't understand. There should be no difference between (1) calculate gits_translater_gpa in the machine init done notifier (2) calculate gits_translater_gpa the first time that we need it, ie on first call to kvm_its_send_msi() We don't use it anywhere else, do we ? thanks -- PMM
Hi Peter, On 22/09/2016 17:59, Peter Maydell wrote: > On 22 September 2016 at 16:53, Auger Eric <eric.auger@redhat.com> wrote: >> Hi Peter, >> >> On 22/09/2016 17:03, Peter Maydell wrote: >>> Also, I think it would be simpler to just have kvm_its_send_msi() do >>> >>> if (unlikely(!s->translater_gpa_known)) { >>> s->gits_translater_gpa = ...; >>> s->translater_gpa_known = true; >>> } >> My issue precisely is to get the absolue GPA of the ITS translater. >> kvm_its_send_msi is called by the region write callback which works on >> relative address wrt start of the translation region while kvm ioctl >> uses the absolute GPA. I did not see any other way to retrieve the >> absolute GPA than using a machine init done notifier. > > I don't understand. There should be no difference between > (1) calculate gits_translater_gpa in the machine init done notifier > (2) calculate gits_translater_gpa the first time that we need it, > ie on first call to kvm_its_send_msi() > > We don't use it anywhere else, do we ? Oh yes I now understand. Indeed I have all the data needed from kvm_its_send_msi parameters to compute it there. At the moment we do not use it anywhere else. I will proceed that way then. Thanks Eric > > thanks > -- PMM >
diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs index 23a39f7..9cca280 100644 --- a/hw/intc/Makefile.objs +++ b/hw/intc/Makefile.objs @@ -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 diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c new file mode 100644 index 0000000..b9d10dc --- /dev/null +++ b/hw/intc/arm_gicv3_its_kvm.c @@ -0,0 +1,136 @@ +/* + * 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; + + 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); +} + +typedef struct ItsInitNotifierParams { + Notifier notifier; + GICv3ITSState *s; +} ItsInitNotifierParams; + +/* this notifier computes and stores the ITS MSI frame GPA */ +static void its_notify(Notifier *notifier, void *data) +{ + ItsInitNotifierParams *p = DO_UPCAST(ItsInitNotifierParams, + notifier, notifier); + GICv3ITSState *s = p->s; + MemoryRegion *mr = &s->iomem_its_translation; + MemoryRegionSection mrs; + uint64_t addr; + + mrs = memory_region_find(mr, 0, 1); + addr = mrs.offset_within_address_space; + s->gits_translater_gpa = addr + 0x40; +} + +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; + } + + /* explicit init if 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); + + p->notifier.notify = its_notify; + p->s = s; + qemu_add_machine_init_done_notifier(&p->notifier); + + /* + * 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); + + 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)