| /* |
| * QEMU S390x floating interrupt controller (flic) |
| * |
| * Copyright 2014 IBM Corp. |
| * Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com> |
| * Cornelia Huck <cornelia.huck@de.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| * your option) any later version. See the COPYING file in the top-level |
| * directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/error-report.h" |
| #include "hw/sysbus.h" |
| #include "hw/s390x/ioinst.h" |
| #include "hw/s390x/s390_flic.h" |
| #include "hw/s390x/css.h" |
| #include "trace.h" |
| #include "cpu.h" |
| #include "hw/qdev.h" |
| #include "qapi/error.h" |
| #include "hw/s390x/s390-virtio-ccw.h" |
| |
| S390FLICStateClass *s390_get_flic_class(S390FLICState *fs) |
| { |
| static S390FLICStateClass *class; |
| |
| if (!class) { |
| /* we only have one flic device, so this is fine to cache */ |
| class = S390_FLIC_COMMON_GET_CLASS(fs); |
| } |
| return class; |
| } |
| |
| QEMUS390FLICState *s390_get_qemu_flic(S390FLICState *fs) |
| { |
| static QEMUS390FLICState *flic; |
| |
| if (!flic) { |
| /* we only have one flic device, so this is fine to cache */ |
| flic = QEMU_S390_FLIC(fs); |
| } |
| return flic; |
| } |
| |
| S390FLICState *s390_get_flic(void) |
| { |
| static S390FLICState *fs; |
| |
| if (!fs) { |
| fs = S390_FLIC_COMMON(object_resolve_path_type("", |
| TYPE_S390_FLIC_COMMON, |
| NULL)); |
| } |
| return fs; |
| } |
| |
| void s390_flic_init(void) |
| { |
| DeviceState *dev; |
| |
| if (kvm_enabled()) { |
| dev = qdev_create(NULL, TYPE_KVM_S390_FLIC); |
| object_property_add_child(qdev_get_machine(), TYPE_KVM_S390_FLIC, |
| OBJECT(dev), NULL); |
| } else { |
| dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC); |
| object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC, |
| OBJECT(dev), NULL); |
| } |
| qdev_init_nofail(dev); |
| } |
| |
| static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id, |
| uint8_t isc, bool swap, |
| bool is_maskable, uint8_t flags) |
| { |
| /* nothing to do */ |
| return 0; |
| } |
| |
| static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id, |
| uint64_t map_addr, bool do_map) |
| { |
| /* nothing to do */ |
| return 0; |
| } |
| |
| static int qemu_s390_add_adapter_routes(S390FLICState *fs, |
| AdapterRoutes *routes) |
| { |
| return -ENOSYS; |
| } |
| |
| static void qemu_s390_release_adapter_routes(S390FLICState *fs, |
| AdapterRoutes *routes) |
| { |
| } |
| |
| static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id, |
| uint16_t subchannel_nr) |
| { |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| QEMUS390FlicIO *cur, *next; |
| uint8_t isc; |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| if (!(flic->pending & FLIC_PENDING_IO)) { |
| return 0; |
| } |
| |
| /* check all iscs */ |
| for (isc = 0; isc < 8; isc++) { |
| if (QLIST_EMPTY(&flic->io[isc])) { |
| continue; |
| } |
| |
| /* search and delete any matching one */ |
| QLIST_FOREACH_SAFE(cur, &flic->io[isc], next, next) { |
| if (cur->id == subchannel_id && cur->nr == subchannel_nr) { |
| QLIST_REMOVE(cur, next); |
| g_free(cur); |
| } |
| } |
| |
| /* update our indicator bit */ |
| if (QLIST_EMPTY(&flic->io[isc])) { |
| flic->pending &= ~ISC_TO_PENDING_IO(isc); |
| } |
| } |
| return 0; |
| } |
| |
| static int qemu_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc, |
| uint16_t mode) |
| { |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| |
| switch (mode) { |
| case SIC_IRQ_MODE_ALL: |
| flic->simm &= ~AIS_MODE_MASK(isc); |
| flic->nimm &= ~AIS_MODE_MASK(isc); |
| break; |
| case SIC_IRQ_MODE_SINGLE: |
| flic->simm |= AIS_MODE_MASK(isc); |
| flic->nimm &= ~AIS_MODE_MASK(isc); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int qemu_s390_inject_airq(S390FLICState *fs, uint8_t type, |
| uint8_t isc, uint8_t flags) |
| { |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| S390FLICStateClass *fsc = s390_get_flic_class(fs); |
| bool flag = flags & S390_ADAPTER_SUPPRESSIBLE; |
| uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI; |
| |
| if (flag && (flic->nimm & AIS_MODE_MASK(isc))) { |
| trace_qemu_s390_airq_suppressed(type, isc); |
| return 0; |
| } |
| |
| fsc->inject_io(fs, 0, 0, 0, io_int_word); |
| |
| if (flag && (flic->simm & AIS_MODE_MASK(isc))) { |
| flic->nimm |= AIS_MODE_MASK(isc); |
| trace_qemu_s390_suppress_airq(isc, "Single-Interruption Mode", |
| "NO-Interruptions Mode"); |
| } |
| |
| return 0; |
| } |
| |
| static void qemu_s390_flic_notify(uint32_t type) |
| { |
| CPUState *cs; |
| |
| /* |
| * We have to make all CPUs see CPU_INTERRUPT_HARD, so they might |
| * consider it. We will kick all running CPUs and only relevant |
| * sleeping ones. |
| */ |
| CPU_FOREACH(cs) { |
| S390CPU *cpu = S390_CPU(cs); |
| |
| cs->interrupt_request |= CPU_INTERRUPT_HARD; |
| |
| /* ignore CPUs that are not sleeping */ |
| if (s390_cpu_get_state(cpu) != S390_CPU_STATE_OPERATING && |
| s390_cpu_get_state(cpu) != S390_CPU_STATE_LOAD) { |
| continue; |
| } |
| |
| /* we always kick running CPUs for now, this is tricky */ |
| if (cs->halted) { |
| /* don't check for subclasses, CPUs double check when waking up */ |
| if (type & FLIC_PENDING_SERVICE) { |
| if (!(cpu->env.psw.mask & PSW_MASK_EXT)) { |
| continue; |
| } |
| } else if (type & FLIC_PENDING_IO) { |
| if (!(cpu->env.psw.mask & PSW_MASK_IO)) { |
| continue; |
| } |
| } else if (type & FLIC_PENDING_MCHK_CR) { |
| if (!(cpu->env.psw.mask & PSW_MASK_MCHECK)) { |
| continue; |
| } |
| } |
| } |
| cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
| } |
| } |
| |
| uint32_t qemu_s390_flic_dequeue_service(QEMUS390FLICState *flic) |
| { |
| uint32_t tmp; |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| g_assert(flic->pending & FLIC_PENDING_SERVICE); |
| tmp = flic->service_param; |
| flic->service_param = 0; |
| flic->pending &= ~FLIC_PENDING_SERVICE; |
| |
| return tmp; |
| } |
| |
| /* caller has to free the returned object */ |
| QEMUS390FlicIO *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6) |
| { |
| QEMUS390FlicIO *io; |
| uint8_t isc; |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| if (!(flic->pending & CR6_TO_PENDING_IO(cr6))) { |
| return NULL; |
| } |
| |
| for (isc = 0; isc < 8; isc++) { |
| if (QLIST_EMPTY(&flic->io[isc]) || !(cr6 & ISC_TO_ISC_BITS(isc))) { |
| continue; |
| } |
| io = QLIST_FIRST(&flic->io[isc]); |
| QLIST_REMOVE(io, next); |
| |
| /* update our indicator bit */ |
| if (QLIST_EMPTY(&flic->io[isc])) { |
| flic->pending &= ~ISC_TO_PENDING_IO(isc); |
| } |
| return io; |
| } |
| |
| return NULL; |
| } |
| |
| void qemu_s390_flic_dequeue_crw_mchk(QEMUS390FLICState *flic) |
| { |
| g_assert(qemu_mutex_iothread_locked()); |
| g_assert(flic->pending & FLIC_PENDING_MCHK_CR); |
| flic->pending &= ~FLIC_PENDING_MCHK_CR; |
| } |
| |
| static void qemu_s390_inject_service(S390FLICState *fs, uint32_t parm) |
| { |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| /* multiplexing is good enough for sclp - kvm does it internally as well */ |
| flic->service_param |= parm; |
| flic->pending |= FLIC_PENDING_SERVICE; |
| |
| qemu_s390_flic_notify(FLIC_PENDING_SERVICE); |
| } |
| |
| static void qemu_s390_inject_io(S390FLICState *fs, uint16_t subchannel_id, |
| uint16_t subchannel_nr, uint32_t io_int_parm, |
| uint32_t io_int_word) |
| { |
| const uint8_t isc = IO_INT_WORD_ISC(io_int_word); |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| QEMUS390FlicIO *io; |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| io = g_new0(QEMUS390FlicIO, 1); |
| io->id = subchannel_id; |
| io->nr = subchannel_nr; |
| io->parm = io_int_parm; |
| io->word = io_int_word; |
| |
| QLIST_INSERT_HEAD(&flic->io[isc], io, next); |
| flic->pending |= ISC_TO_PENDING_IO(isc); |
| |
| qemu_s390_flic_notify(ISC_TO_PENDING_IO(isc)); |
| } |
| |
| static void qemu_s390_inject_crw_mchk(S390FLICState *fs) |
| { |
| QEMUS390FLICState *flic = s390_get_qemu_flic(fs); |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| flic->pending |= FLIC_PENDING_MCHK_CR; |
| |
| qemu_s390_flic_notify(FLIC_PENDING_MCHK_CR); |
| } |
| |
| bool qemu_s390_flic_has_service(QEMUS390FLICState *flic) |
| { |
| /* called without lock via cc->has_work, will be validated under lock */ |
| return !!(flic->pending & FLIC_PENDING_SERVICE); |
| } |
| |
| bool qemu_s390_flic_has_io(QEMUS390FLICState *flic, uint64_t cr6) |
| { |
| /* called without lock via cc->has_work, will be validated under lock */ |
| return !!(flic->pending & CR6_TO_PENDING_IO(cr6)); |
| } |
| |
| bool qemu_s390_flic_has_crw_mchk(QEMUS390FLICState *flic) |
| { |
| /* called without lock via cc->has_work, will be validated under lock */ |
| return !!(flic->pending & FLIC_PENDING_MCHK_CR); |
| } |
| |
| bool qemu_s390_flic_has_any(QEMUS390FLICState *flic) |
| { |
| g_assert(qemu_mutex_iothread_locked()); |
| return !!flic->pending; |
| } |
| |
| static void qemu_s390_flic_reset(DeviceState *dev) |
| { |
| QEMUS390FLICState *flic = QEMU_S390_FLIC(dev); |
| QEMUS390FlicIO *cur, *next; |
| int isc; |
| |
| g_assert(qemu_mutex_iothread_locked()); |
| flic->simm = 0; |
| flic->nimm = 0; |
| flic->pending = 0; |
| |
| /* remove all pending io interrupts */ |
| for (isc = 0; isc < 8; isc++) { |
| QLIST_FOREACH_SAFE(cur, &flic->io[isc], next, next) { |
| QLIST_REMOVE(cur, next); |
| g_free(cur); |
| } |
| } |
| } |
| |
| bool ais_needed(void *opaque) |
| { |
| S390FLICState *s = opaque; |
| |
| return s->ais_supported; |
| } |
| |
| static const VMStateDescription qemu_s390_flic_vmstate = { |
| .name = "qemu-s390-flic", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = ais_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8(simm, QEMUS390FLICState), |
| VMSTATE_UINT8(nimm, QEMUS390FLICState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void qemu_s390_flic_instance_init(Object *obj) |
| { |
| QEMUS390FLICState *flic = QEMU_S390_FLIC(obj); |
| int isc; |
| |
| for (isc = 0; isc < 8; isc++) { |
| QLIST_INIT(&flic->io[isc]); |
| } |
| } |
| |
| static void qemu_s390_flic_class_init(ObjectClass *oc, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(oc); |
| S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc); |
| |
| dc->reset = qemu_s390_flic_reset; |
| dc->vmsd = &qemu_s390_flic_vmstate; |
| fsc->register_io_adapter = qemu_s390_register_io_adapter; |
| fsc->io_adapter_map = qemu_s390_io_adapter_map; |
| fsc->add_adapter_routes = qemu_s390_add_adapter_routes; |
| fsc->release_adapter_routes = qemu_s390_release_adapter_routes; |
| fsc->clear_io_irq = qemu_s390_clear_io_flic; |
| fsc->modify_ais_mode = qemu_s390_modify_ais_mode; |
| fsc->inject_airq = qemu_s390_inject_airq; |
| fsc->inject_service = qemu_s390_inject_service; |
| fsc->inject_io = qemu_s390_inject_io; |
| fsc->inject_crw_mchk = qemu_s390_inject_crw_mchk; |
| } |
| |
| static Property s390_flic_common_properties[] = { |
| DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState, |
| adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void s390_flic_common_realize(DeviceState *dev, Error **errp) |
| { |
| S390FLICState *fs = S390_FLIC_COMMON(dev); |
| uint32_t max_batch = fs->adapter_routes_max_batch; |
| |
| if (max_batch > ADAPTER_ROUTES_MAX_GSI) { |
| error_setg(errp, "flic property adapter_routes_max_batch too big" |
| " (%d > %d)", max_batch, ADAPTER_ROUTES_MAX_GSI); |
| return; |
| } |
| |
| fs->ais_supported = s390_has_feat(S390_FEAT_ADAPTER_INT_SUPPRESSION); |
| } |
| |
| static void s390_flic_class_init(ObjectClass *oc, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(oc); |
| |
| dc->props = s390_flic_common_properties; |
| dc->realize = s390_flic_common_realize; |
| } |
| |
| static const TypeInfo qemu_s390_flic_info = { |
| .name = TYPE_QEMU_S390_FLIC, |
| .parent = TYPE_S390_FLIC_COMMON, |
| .instance_size = sizeof(QEMUS390FLICState), |
| .instance_init = qemu_s390_flic_instance_init, |
| .class_init = qemu_s390_flic_class_init, |
| }; |
| |
| |
| static const TypeInfo s390_flic_common_info = { |
| .name = TYPE_S390_FLIC_COMMON, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(S390FLICState), |
| .class_init = s390_flic_class_init, |
| .class_size = sizeof(S390FLICStateClass), |
| }; |
| |
| static void qemu_s390_flic_register_types(void) |
| { |
| type_register_static(&s390_flic_common_info); |
| type_register_static(&qemu_s390_flic_info); |
| } |
| |
| type_init(qemu_s390_flic_register_types) |
| |
| static bool adapter_info_so_needed(void *opaque) |
| { |
| return css_migration_enabled(); |
| } |
| |
| const VMStateDescription vmstate_adapter_info_so = { |
| .name = "s390_adapter_info/summary_offset", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = adapter_info_so_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(summary_offset, AdapterInfo), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| const VMStateDescription vmstate_adapter_info = { |
| .name = "s390_adapter_info", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT64(ind_offset, AdapterInfo), |
| /* |
| * We do not have to migrate neither the id nor the addresses. |
| * The id is set by css_register_io_adapter and the addresses |
| * are set based on the IndAddr objects after those get mapped. |
| */ |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription * []) { |
| &vmstate_adapter_info_so, |
| NULL |
| } |
| }; |
| |
| const VMStateDescription vmstate_adapter_routes = { |
| |
| .name = "s390_adapter_routes", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_STRUCT(adapter, AdapterRoutes, 1, vmstate_adapter_info, |
| AdapterInfo), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
