250 lines
6.9 KiB
C
250 lines
6.9 KiB
C
/*
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* QEMU S390x floating interrupt controller (flic)
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*
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* Copyright 2014 IBM Corp.
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* Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com>
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* Cornelia Huck <cornelia.huck@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "hw/sysbus.h"
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#include "hw/s390x/ioinst.h"
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#include "hw/s390x/s390_flic.h"
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#include "hw/s390x/css.h"
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#include "trace.h"
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#include "cpu.h"
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#include "hw/qdev.h"
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#include "qapi/error.h"
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#include "hw/s390x/s390-virtio-ccw.h"
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S390FLICState *s390_get_flic(void)
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{
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static S390FLICState *fs;
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if (!fs) {
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fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
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if (!fs) {
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fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC,
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NULL));
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}
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}
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return fs;
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}
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void s390_flic_init(void)
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{
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DeviceState *dev;
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dev = s390_flic_kvm_create();
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if (!dev) {
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dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
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object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
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OBJECT(dev), NULL);
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}
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qdev_init_nofail(dev);
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}
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static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
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uint8_t isc, bool swap,
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bool is_maskable, uint8_t flags)
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{
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/* nothing to do */
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return 0;
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}
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static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
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uint64_t map_addr, bool do_map)
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{
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/* nothing to do */
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return 0;
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}
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static int qemu_s390_add_adapter_routes(S390FLICState *fs,
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AdapterRoutes *routes)
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{
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return -ENOSYS;
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}
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static void qemu_s390_release_adapter_routes(S390FLICState *fs,
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AdapterRoutes *routes)
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{
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}
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static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
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uint16_t subchannel_nr)
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{
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/* Fixme TCG */
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return -ENOSYS;
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}
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static int qemu_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
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uint16_t mode)
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{
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QEMUS390FLICState *flic = QEMU_S390_FLIC(fs);
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switch (mode) {
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case SIC_IRQ_MODE_ALL:
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flic->simm &= ~AIS_MODE_MASK(isc);
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flic->nimm &= ~AIS_MODE_MASK(isc);
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break;
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case SIC_IRQ_MODE_SINGLE:
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flic->simm |= AIS_MODE_MASK(isc);
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flic->nimm &= ~AIS_MODE_MASK(isc);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int qemu_s390_inject_airq(S390FLICState *fs, uint8_t type,
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uint8_t isc, uint8_t flags)
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{
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QEMUS390FLICState *flic = QEMU_S390_FLIC(fs);
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bool flag = flags & S390_ADAPTER_SUPPRESSIBLE;
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uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
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if (flag && (flic->nimm & AIS_MODE_MASK(isc))) {
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trace_qemu_s390_airq_suppressed(type, isc);
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return 0;
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}
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s390_io_interrupt(0, 0, 0, io_int_word);
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if (flag && (flic->simm & AIS_MODE_MASK(isc))) {
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flic->nimm |= AIS_MODE_MASK(isc);
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trace_qemu_s390_suppress_airq(isc, "Single-Interruption Mode",
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"NO-Interruptions Mode");
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}
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return 0;
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}
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static void qemu_s390_flic_reset(DeviceState *dev)
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{
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QEMUS390FLICState *flic = QEMU_S390_FLIC(dev);
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flic->simm = 0;
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flic->nimm = 0;
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}
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static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
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dc->reset = qemu_s390_flic_reset;
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fsc->register_io_adapter = qemu_s390_register_io_adapter;
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fsc->io_adapter_map = qemu_s390_io_adapter_map;
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fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
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fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
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fsc->clear_io_irq = qemu_s390_clear_io_flic;
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fsc->modify_ais_mode = qemu_s390_modify_ais_mode;
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fsc->inject_airq = qemu_s390_inject_airq;
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}
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static Property s390_flic_common_properties[] = {
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DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
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adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void s390_flic_common_realize(DeviceState *dev, Error **errp)
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{
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S390FLICState *fs = S390_FLIC_COMMON(dev);
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uint32_t max_batch = fs->adapter_routes_max_batch;
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if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
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error_setg(errp, "flic property adapter_routes_max_batch too big"
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" (%d > %d)", max_batch, ADAPTER_ROUTES_MAX_GSI);
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return;
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}
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fs->ais_supported = s390_has_feat(S390_FEAT_ADAPTER_INT_SUPPRESSION);
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}
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static void s390_flic_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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dc->props = s390_flic_common_properties;
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dc->realize = s390_flic_common_realize;
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}
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static const TypeInfo qemu_s390_flic_info = {
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.name = TYPE_QEMU_S390_FLIC,
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.parent = TYPE_S390_FLIC_COMMON,
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.instance_size = sizeof(QEMUS390FLICState),
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.class_init = qemu_s390_flic_class_init,
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};
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static const TypeInfo s390_flic_common_info = {
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.name = TYPE_S390_FLIC_COMMON,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(S390FLICState),
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.class_init = s390_flic_class_init,
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.class_size = sizeof(S390FLICStateClass),
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};
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static void qemu_s390_flic_register_types(void)
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{
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type_register_static(&s390_flic_common_info);
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type_register_static(&qemu_s390_flic_info);
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}
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type_init(qemu_s390_flic_register_types)
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static bool adapter_info_so_needed(void *opaque)
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{
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return css_migration_enabled();
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}
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const VMStateDescription vmstate_adapter_info_so = {
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.name = "s390_adapter_info/summary_offset",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = adapter_info_so_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(summary_offset, AdapterInfo),
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VMSTATE_END_OF_LIST()
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}
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};
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const VMStateDescription vmstate_adapter_info = {
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.name = "s390_adapter_info",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64(ind_offset, AdapterInfo),
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/*
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* We do not have to migrate neither the id nor the addresses.
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* The id is set by css_register_io_adapter and the addresses
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* are set based on the IndAddr objects after those get mapped.
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*/
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VMSTATE_END_OF_LIST()
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},
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.subsections = (const VMStateDescription * []) {
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&vmstate_adapter_info_so,
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NULL
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}
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};
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const VMStateDescription vmstate_adapter_routes = {
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.name = "s390_adapter_routes",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_STRUCT(adapter, AdapterRoutes, 1, vmstate_adapter_info,
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AdapterInfo),
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VMSTATE_END_OF_LIST()
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}
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};
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