*
*/
-#include "monitor/monitor.h"
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/event-facility.h"
-typedef struct EventTypesBus {
+typedef struct SCLPEventsBus {
BusState qbus;
-} EventTypesBus;
+} SCLPEventsBus;
+
+/* we need to save 32 bit chunks for compatibility */
+#ifdef HOST_WORDS_BIGENDIAN
+#define RECV_MASK_LOWER 1
+#define RECV_MASK_UPPER 0
+#else /* little endian host */
+#define RECV_MASK_LOWER 0
+#define RECV_MASK_UPPER 1
+#endif
struct SCLPEventFacility {
- EventTypesBus sbus;
- DeviceState *qdev;
- /* guest' receive mask */
- unsigned int receive_mask;
+ SysBusDevice parent_obj;
+ SCLPEventsBus sbus;
+ /* guest's receive mask */
+ union {
+ uint32_t receive_mask_pieces[2];
+ sccb_mask_t receive_mask;
+ };
+ /*
+ * when false, we keep the same broken, backwards compatible behaviour as
+ * before, allowing only masks of size exactly 4; when true, we implement
+ * the architecture correctly, allowing all valid mask sizes. Needed for
+ * migration toward older versions.
+ */
+ bool allow_all_mask_sizes;
+ /* length of the receive mask */
+ uint16_t mask_length;
};
/* return true if any child has event pending set */
return false;
}
-static unsigned int get_host_send_mask(SCLPEventFacility *ef)
+static sccb_mask_t get_host_send_mask(SCLPEventFacility *ef)
{
- unsigned int mask;
+ sccb_mask_t mask;
BusChild *kid;
SCLPEventClass *child;
return mask;
}
-static unsigned int get_host_receive_mask(SCLPEventFacility *ef)
+static sccb_mask_t get_host_receive_mask(SCLPEventFacility *ef)
{
- unsigned int mask;
+ sccb_mask_t mask;
BusChild *kid;
SCLPEventClass *child;
}
static uint16_t handle_sccb_read_events(SCLPEventFacility *ef, SCCB *sccb,
- unsigned int mask)
+ sccb_mask_t mask)
{
uint16_t rc;
int slen;
return rc;
}
+/* copy up to src_len bytes and fill the rest of dst with zeroes */
+static void copy_mask(uint8_t *dst, uint8_t *src, uint16_t dst_len,
+ uint16_t src_len)
+{
+ int i;
+
+ for (i = 0; i < dst_len; i++) {
+ dst[i] = i < src_len ? src[i] : 0;
+ }
+}
+
static void read_event_data(SCLPEventFacility *ef, SCCB *sccb)
{
- unsigned int sclp_active_selection_mask;
- unsigned int sclp_cp_receive_mask;
+ sccb_mask_t sclp_active_selection_mask;
+ sccb_mask_t sclp_cp_receive_mask;
ReadEventData *red = (ReadEventData *) sccb;
sclp_active_selection_mask = sclp_cp_receive_mask;
break;
case SCLP_SELECTIVE_READ:
- if (!(sclp_cp_receive_mask & be32_to_cpu(red->mask))) {
+ copy_mask((uint8_t *)&sclp_active_selection_mask, (uint8_t *)&red->mask,
+ sizeof(sclp_active_selection_mask), ef->mask_length);
+ sclp_active_selection_mask = be64_to_cpu(sclp_active_selection_mask);
+ if (!sclp_cp_receive_mask ||
+ (sclp_active_selection_mask & ~sclp_cp_receive_mask)) {
sccb->h.response_code =
cpu_to_be16(SCLP_RC_INVALID_SELECTION_MASK);
goto out;
}
- sclp_active_selection_mask = be32_to_cpu(red->mask);
break;
default:
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_FUNCTION);
static void write_event_mask(SCLPEventFacility *ef, SCCB *sccb)
{
WriteEventMask *we_mask = (WriteEventMask *) sccb;
+ uint16_t mask_length = be16_to_cpu(we_mask->mask_length);
+ sccb_mask_t tmp_mask;
- /* Attention: We assume that Linux uses 4-byte masks, what it actually
- does. Architecture allows for masks of variable size, though */
- if (be16_to_cpu(we_mask->mask_length) != 4) {
+ if (!mask_length || (mask_length > SCLP_EVENT_MASK_LEN_MAX) ||
+ ((mask_length != 4) && !ef->allow_all_mask_sizes)) {
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_MASK_LENGTH);
goto out;
}
+ /*
+ * Note: We currently only support masks up to 8 byte length;
+ * the remainder is filled up with zeroes. Older Linux
+ * kernels use a 4 byte mask length, newer ones can use both
+ * 8 or 4 depending on what is available on the host.
+ */
+
/* keep track of the guest's capability masks */
- ef->receive_mask = be32_to_cpu(we_mask->cp_receive_mask);
+ copy_mask((uint8_t *)&tmp_mask, WEM_CP_RECEIVE_MASK(we_mask, mask_length),
+ sizeof(tmp_mask), mask_length);
+ ef->receive_mask = be64_to_cpu(tmp_mask);
/* return the SCLP's capability masks to the guest */
- we_mask->send_mask = cpu_to_be32(get_host_send_mask(ef));
- we_mask->receive_mask = cpu_to_be32(get_host_receive_mask(ef));
+ tmp_mask = cpu_to_be64(get_host_receive_mask(ef));
+ copy_mask(WEM_RECEIVE_MASK(we_mask, mask_length), (uint8_t *)&tmp_mask,
+ mask_length, sizeof(tmp_mask));
+ tmp_mask = cpu_to_be64(get_host_send_mask(ef));
+ copy_mask(WEM_SEND_MASK(we_mask, mask_length), (uint8_t *)&tmp_mask,
+ mask_length, sizeof(tmp_mask));
sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
+ ef->mask_length = mask_length;
out:
return;
#define TYPE_SCLP_EVENTS_BUS "s390-sclp-events-bus"
+static void sclp_events_bus_realize(BusState *bus, Error **errp)
+{
+ BusChild *kid;
+
+ /* TODO: recursive realization has to be done in common code */
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+
+ object_property_set_bool(OBJECT(dev), true, "realized", errp);
+ if (*errp) {
+ return;
+ }
+ }
+}
+
static void sclp_events_bus_class_init(ObjectClass *klass, void *data)
{
+ BusClass *bc = BUS_CLASS(klass);
+
+ bc->realize = sclp_events_bus_realize;
}
-static const TypeInfo s390_sclp_events_bus_info = {
+static const TypeInfo sclp_events_bus_info = {
.name = TYPE_SCLP_EVENTS_BUS,
.parent = TYPE_BUS,
.class_init = sclp_events_bus_class_init,
static void command_handler(SCLPEventFacility *ef, SCCB *sccb, uint64_t code)
{
- switch (code) {
+ switch (code & SCLP_CMD_CODE_MASK) {
case SCLP_CMD_READ_EVENT_DATA:
read_event_data(ef, sccb);
break;
}
}
-static int init_event_facility(S390SCLPDevice *sdev)
+static bool vmstate_event_facility_mask64_needed(void *opaque)
{
- SCLPEventFacility *event_facility;
- DeviceState *quiesce;
+ SCLPEventFacility *ef = opaque;
- event_facility = g_malloc0(sizeof(SCLPEventFacility));
- sdev->ef = event_facility;
- sdev->sclp_command_handler = command_handler;
- sdev->event_pending = event_pending;
+ return (ef->receive_mask & 0xFFFFFFFF) != 0;
+}
- /* Spawn a new sclp-events facility */
- qbus_create_inplace(&event_facility->sbus, sizeof(event_facility->sbus),
- TYPE_SCLP_EVENTS_BUS, DEVICE(sdev), NULL);
- event_facility->sbus.qbus.allow_hotplug = 0;
- event_facility->qdev = (DeviceState *) sdev;
+static bool vmstate_event_facility_mask_length_needed(void *opaque)
+{
+ SCLPEventFacility *ef = opaque;
- quiesce = qdev_create(&event_facility->sbus.qbus, "sclpquiesce");
- if (!quiesce) {
- return -1;
- }
- qdev_init_nofail(quiesce);
+ return ef->allow_all_mask_sizes;
+}
+
+static const VMStateDescription vmstate_event_facility_mask64 = {
+ .name = "vmstate-event-facility/mask64",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .needed = vmstate_event_facility_mask64_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(receive_mask_pieces[RECV_MASK_LOWER], SCLPEventFacility),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_event_facility_mask_length = {
+ .name = "vmstate-event-facility/mask_length",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .needed = vmstate_event_facility_mask_length_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT16(mask_length, SCLPEventFacility),
+ VMSTATE_END_OF_LIST()
+ }
+};
- return 0;
+static const VMStateDescription vmstate_event_facility = {
+ .name = "vmstate-event-facility",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(receive_mask_pieces[RECV_MASK_UPPER], SCLPEventFacility),
+ VMSTATE_END_OF_LIST()
+ },
+ .subsections = (const VMStateDescription * []) {
+ &vmstate_event_facility_mask64,
+ &vmstate_event_facility_mask_length,
+ NULL
+ }
+};
+
+static void sclp_event_set_allow_all_mask_sizes(Object *obj, bool value,
+ Error **errp)
+{
+ SCLPEventFacility *ef = (SCLPEventFacility *)obj;
+
+ ef->allow_all_mask_sizes = value;
+}
+
+static bool sclp_event_get_allow_all_mask_sizes(Object *obj, Error **e)
+{
+ SCLPEventFacility *ef = (SCLPEventFacility *)obj;
+
+ return ef->allow_all_mask_sizes;
+}
+
+static void init_event_facility(Object *obj)
+{
+ SCLPEventFacility *event_facility = EVENT_FACILITY(obj);
+ DeviceState *sdev = DEVICE(obj);
+ Object *new;
+
+ event_facility->mask_length = 4;
+ event_facility->allow_all_mask_sizes = true;
+ object_property_add_bool(obj, "allow_all_mask_sizes",
+ sclp_event_get_allow_all_mask_sizes,
+ sclp_event_set_allow_all_mask_sizes, NULL);
+ /* Spawn a new bus for SCLP events */
+ qbus_create_inplace(&event_facility->sbus, sizeof(event_facility->sbus),
+ TYPE_SCLP_EVENTS_BUS, sdev, NULL);
+
+ new = object_new(TYPE_SCLP_QUIESCE);
+ object_property_add_child(obj, TYPE_SCLP_QUIESCE, new, NULL);
+ object_unref(new);
+ qdev_set_parent_bus(DEVICE(new), &event_facility->sbus.qbus);
+
+ new = object_new(TYPE_SCLP_CPU_HOTPLUG);
+ object_property_add_child(obj, TYPE_SCLP_CPU_HOTPLUG, new, NULL);
+ object_unref(new);
+ qdev_set_parent_bus(DEVICE(new), &event_facility->sbus.qbus);
+ /* the facility will automatically realize the devices via the bus */
}
static void reset_event_facility(DeviceState *dev)
{
- S390SCLPDevice *sdev = SCLP_S390_DEVICE(dev);
+ SCLPEventFacility *sdev = EVENT_FACILITY(dev);
- sdev->ef->receive_mask = 0;
+ sdev->receive_mask = 0;
}
static void init_event_facility_class(ObjectClass *klass, void *data)
{
- DeviceClass *dc = DEVICE_CLASS(klass);
- S390SCLPDeviceClass *k = SCLP_S390_DEVICE_CLASS(klass);
+ SysBusDeviceClass *sbdc = SYS_BUS_DEVICE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(sbdc);
+ SCLPEventFacilityClass *k = EVENT_FACILITY_CLASS(dc);
dc->reset = reset_event_facility;
- k->init = init_event_facility;
+ dc->vmsd = &vmstate_event_facility;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ k->command_handler = command_handler;
+ k->event_pending = event_pending;
}
-static const TypeInfo s390_sclp_event_facility_info = {
- .name = "s390-sclp-event-facility",
- .parent = TYPE_DEVICE_S390_SCLP,
- .instance_size = sizeof(S390SCLPDevice),
+static const TypeInfo sclp_event_facility_info = {
+ .name = TYPE_SCLP_EVENT_FACILITY,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_init = init_event_facility,
+ .instance_size = sizeof(SCLPEventFacility),
.class_init = init_event_facility_class,
+ .class_size = sizeof(SCLPEventFacilityClass),
};
-static int event_qdev_init(DeviceState *qdev)
+static void event_realize(DeviceState *qdev, Error **errp)
{
- SCLPEvent *event = DO_UPCAST(SCLPEvent, qdev, qdev);
+ SCLPEvent *event = SCLP_EVENT(qdev);
SCLPEventClass *child = SCLP_EVENT_GET_CLASS(event);
- return child->init(event);
-}
-
-static int event_qdev_exit(DeviceState *qdev)
-{
- SCLPEvent *event = DO_UPCAST(SCLPEvent, qdev, qdev);
- SCLPEventClass *child = SCLP_EVENT_GET_CLASS(event);
- if (child->exit) {
- child->exit(event);
+ if (child->init) {
+ int rc = child->init(event);
+ if (rc < 0) {
+ error_setg(errp, "SCLP event initialization failed.");
+ return;
+ }
}
- return 0;
}
static void event_class_init(ObjectClass *klass, void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
dc->bus_type = TYPE_SCLP_EVENTS_BUS;
- dc->unplug = qdev_simple_unplug_cb;
- dc->init = event_qdev_init;
- dc->exit = event_qdev_exit;
+ dc->realize = event_realize;
}
-static const TypeInfo s390_sclp_event_type_info = {
+static const TypeInfo sclp_event_type_info = {
.name = TYPE_SCLP_EVENT,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SCLPEvent),
static void register_types(void)
{
- type_register_static(&s390_sclp_events_bus_info);
- type_register_static(&s390_sclp_event_facility_info);
- type_register_static(&s390_sclp_event_type_info);
+ type_register_static(&sclp_events_bus_info);
+ type_register_static(&sclp_event_facility_info);
+ type_register_static(&sclp_event_type_info);
}
type_init(register_types)
+
+BusState *sclp_get_event_facility_bus(void)
+{
+ Object *busobj;
+ SCLPEventsBus *sbus;
+
+ busobj = object_resolve_path_type("", TYPE_SCLP_EVENTS_BUS, NULL);
+ sbus = OBJECT_CHECK(SCLPEventsBus, busobj, TYPE_SCLP_EVENTS_BUS);
+ if (!sbus) {
+ return NULL;
+ }
+
+ return &sbus->qbus;
+}
projects / qemu.git / blobdiff