2012-10-29 03:13:23 +01:00
|
|
|
/*
|
|
|
|
* SCLP
|
|
|
|
* Event Facility
|
|
|
|
* handles SCLP event types
|
|
|
|
* - Signal Quiesce - system power down
|
|
|
|
* - ASCII Console Data - VT220 read and write
|
|
|
|
*
|
|
|
|
* Copyright IBM, Corp. 2012
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Heinz Graalfs <graalfs@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.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2012-12-17 18:19:49 +01:00
|
|
|
#include "monitor/monitor.h"
|
2012-12-17 18:20:04 +01:00
|
|
|
#include "sysemu/sysemu.h"
|
2012-10-29 03:13:23 +01:00
|
|
|
|
2013-02-04 15:40:22 +01:00
|
|
|
#include "hw/s390x/sclp.h"
|
|
|
|
#include "hw/s390x/event-facility.h"
|
2012-10-29 03:13:23 +01:00
|
|
|
|
2013-12-23 10:25:38 +01:00
|
|
|
typedef struct SCLPEventsBus {
|
2012-10-29 03:13:23 +01:00
|
|
|
BusState qbus;
|
2013-12-23 10:25:38 +01:00
|
|
|
} SCLPEventsBus;
|
2012-10-29 03:13:23 +01:00
|
|
|
|
|
|
|
struct SCLPEventFacility {
|
2013-12-18 10:10:49 +01:00
|
|
|
SysBusDevice parent_obj;
|
2013-12-23 10:25:38 +01:00
|
|
|
SCLPEventsBus sbus;
|
2012-10-29 03:13:23 +01:00
|
|
|
/* guest' receive mask */
|
|
|
|
unsigned int receive_mask;
|
|
|
|
};
|
|
|
|
|
2014-01-20 20:51:50 +01:00
|
|
|
SCLPEvent cpu_hotplug;
|
|
|
|
|
2012-10-29 03:13:23 +01:00
|
|
|
/* return true if any child has event pending set */
|
|
|
|
static bool event_pending(SCLPEventFacility *ef)
|
|
|
|
{
|
|
|
|
BusChild *kid;
|
|
|
|
SCLPEvent *event;
|
|
|
|
SCLPEventClass *event_class;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
|
|
|
|
DeviceState *qdev = kid->child;
|
|
|
|
event = DO_UPCAST(SCLPEvent, qdev, qdev);
|
|
|
|
event_class = SCLP_EVENT_GET_CLASS(event);
|
|
|
|
if (event->event_pending &&
|
|
|
|
event_class->get_send_mask() & ef->receive_mask) {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int get_host_send_mask(SCLPEventFacility *ef)
|
|
|
|
{
|
|
|
|
unsigned int mask;
|
|
|
|
BusChild *kid;
|
|
|
|
SCLPEventClass *child;
|
|
|
|
|
|
|
|
mask = 0;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
|
|
|
|
DeviceState *qdev = kid->child;
|
|
|
|
child = SCLP_EVENT_GET_CLASS((SCLPEvent *) qdev);
|
|
|
|
mask |= child->get_send_mask();
|
|
|
|
}
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int get_host_receive_mask(SCLPEventFacility *ef)
|
|
|
|
{
|
|
|
|
unsigned int mask;
|
|
|
|
BusChild *kid;
|
|
|
|
SCLPEventClass *child;
|
|
|
|
|
|
|
|
mask = 0;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
|
|
|
|
DeviceState *qdev = kid->child;
|
|
|
|
child = SCLP_EVENT_GET_CLASS((SCLPEvent *) qdev);
|
|
|
|
mask |= child->get_receive_mask();
|
|
|
|
}
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint16_t write_event_length_check(SCCB *sccb)
|
|
|
|
{
|
|
|
|
int slen;
|
|
|
|
unsigned elen = 0;
|
|
|
|
EventBufferHeader *event;
|
|
|
|
WriteEventData *wed = (WriteEventData *) sccb;
|
|
|
|
|
|
|
|
event = (EventBufferHeader *) &wed->ebh;
|
|
|
|
for (slen = sccb_data_len(sccb); slen > 0; slen -= elen) {
|
|
|
|
elen = be16_to_cpu(event->length);
|
|
|
|
if (elen < sizeof(*event) || elen > slen) {
|
|
|
|
return SCLP_RC_EVENT_BUFFER_SYNTAX_ERROR;
|
|
|
|
}
|
|
|
|
event = (void *) event + elen;
|
|
|
|
}
|
|
|
|
if (slen) {
|
|
|
|
return SCLP_RC_INCONSISTENT_LENGTHS;
|
|
|
|
}
|
|
|
|
return SCLP_RC_NORMAL_COMPLETION;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint16_t handle_write_event_buf(SCLPEventFacility *ef,
|
|
|
|
EventBufferHeader *event_buf, SCCB *sccb)
|
|
|
|
{
|
|
|
|
uint16_t rc;
|
|
|
|
BusChild *kid;
|
|
|
|
SCLPEvent *event;
|
|
|
|
SCLPEventClass *ec;
|
|
|
|
|
2012-11-23 01:18:12 +01:00
|
|
|
rc = SCLP_RC_INVALID_FUNCTION;
|
|
|
|
|
2012-10-29 03:13:23 +01:00
|
|
|
QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
|
|
|
|
DeviceState *qdev = kid->child;
|
|
|
|
event = (SCLPEvent *) qdev;
|
|
|
|
ec = SCLP_EVENT_GET_CLASS(event);
|
|
|
|
|
|
|
|
if (ec->write_event_data &&
|
2013-09-17 13:07:30 +02:00
|
|
|
ec->can_handle_event(event_buf->type)) {
|
2012-10-29 03:13:23 +01:00
|
|
|
rc = ec->write_event_data(event, event_buf);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint16_t handle_sccb_write_events(SCLPEventFacility *ef, SCCB *sccb)
|
|
|
|
{
|
|
|
|
uint16_t rc;
|
|
|
|
int slen;
|
|
|
|
unsigned elen = 0;
|
|
|
|
EventBufferHeader *event_buf;
|
|
|
|
WriteEventData *wed = (WriteEventData *) sccb;
|
|
|
|
|
|
|
|
event_buf = &wed->ebh;
|
|
|
|
rc = SCLP_RC_NORMAL_COMPLETION;
|
|
|
|
|
|
|
|
/* loop over all contained event buffers */
|
|
|
|
for (slen = sccb_data_len(sccb); slen > 0; slen -= elen) {
|
|
|
|
elen = be16_to_cpu(event_buf->length);
|
|
|
|
|
|
|
|
/* in case of a previous error mark all trailing buffers
|
|
|
|
* as not accepted */
|
|
|
|
if (rc != SCLP_RC_NORMAL_COMPLETION) {
|
|
|
|
event_buf->flags &= ~(SCLP_EVENT_BUFFER_ACCEPTED);
|
|
|
|
} else {
|
|
|
|
rc = handle_write_event_buf(ef, event_buf, sccb);
|
|
|
|
}
|
|
|
|
event_buf = (void *) event_buf + elen;
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void write_event_data(SCLPEventFacility *ef, SCCB *sccb)
|
|
|
|
{
|
|
|
|
if (sccb->h.function_code != SCLP_FC_NORMAL_WRITE) {
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_FUNCTION);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (be16_to_cpu(sccb->h.length) < 8) {
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
/* first do a sanity check of the write events */
|
|
|
|
sccb->h.response_code = cpu_to_be16(write_event_length_check(sccb));
|
|
|
|
|
|
|
|
/* if no early error, then execute */
|
|
|
|
if (sccb->h.response_code == be16_to_cpu(SCLP_RC_NORMAL_COMPLETION)) {
|
|
|
|
sccb->h.response_code =
|
|
|
|
cpu_to_be16(handle_sccb_write_events(ef, sccb));
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint16_t handle_sccb_read_events(SCLPEventFacility *ef, SCCB *sccb,
|
|
|
|
unsigned int mask)
|
|
|
|
{
|
|
|
|
uint16_t rc;
|
|
|
|
int slen;
|
2013-08-19 09:41:24 +02:00
|
|
|
unsigned elen;
|
2012-10-29 03:13:23 +01:00
|
|
|
BusChild *kid;
|
|
|
|
SCLPEvent *event;
|
|
|
|
SCLPEventClass *ec;
|
|
|
|
EventBufferHeader *event_buf;
|
|
|
|
ReadEventData *red = (ReadEventData *) sccb;
|
|
|
|
|
|
|
|
event_buf = &red->ebh;
|
|
|
|
event_buf->length = 0;
|
|
|
|
slen = sizeof(sccb->data);
|
|
|
|
|
|
|
|
rc = SCLP_RC_NO_EVENT_BUFFERS_STORED;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
|
|
|
|
DeviceState *qdev = kid->child;
|
|
|
|
event = (SCLPEvent *) qdev;
|
|
|
|
ec = SCLP_EVENT_GET_CLASS(event);
|
|
|
|
|
|
|
|
if (mask & ec->get_send_mask()) {
|
|
|
|
if (ec->read_event_data(event, event_buf, &slen)) {
|
2013-08-19 09:41:24 +02:00
|
|
|
elen = be16_to_cpu(event_buf->length);
|
|
|
|
event_buf = (EventBufferHeader *) ((char *)event_buf + elen);
|
2012-10-29 03:13:23 +01:00
|
|
|
rc = SCLP_RC_NORMAL_COMPLETION;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sccb->h.control_mask[2] & SCLP_VARIABLE_LENGTH_RESPONSE) {
|
|
|
|
/* architecture suggests to reset variable-length-response bit */
|
|
|
|
sccb->h.control_mask[2] &= ~SCLP_VARIABLE_LENGTH_RESPONSE;
|
|
|
|
/* with a new length value */
|
|
|
|
sccb->h.length = cpu_to_be16(SCCB_SIZE - slen);
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void read_event_data(SCLPEventFacility *ef, SCCB *sccb)
|
|
|
|
{
|
|
|
|
unsigned int sclp_active_selection_mask;
|
|
|
|
unsigned int sclp_cp_receive_mask;
|
|
|
|
|
|
|
|
ReadEventData *red = (ReadEventData *) sccb;
|
|
|
|
|
|
|
|
if (be16_to_cpu(sccb->h.length) != SCCB_SIZE) {
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
sclp_cp_receive_mask = ef->receive_mask;
|
|
|
|
|
|
|
|
/* get active selection mask */
|
|
|
|
switch (sccb->h.function_code) {
|
|
|
|
case SCLP_UNCONDITIONAL_READ:
|
|
|
|
sclp_active_selection_mask = sclp_cp_receive_mask;
|
|
|
|
break;
|
|
|
|
case SCLP_SELECTIVE_READ:
|
|
|
|
if (!(sclp_cp_receive_mask & be32_to_cpu(red->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);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
sccb->h.response_code = cpu_to_be16(
|
|
|
|
handle_sccb_read_events(ef, sccb, sclp_active_selection_mask));
|
|
|
|
|
|
|
|
out:
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void write_event_mask(SCLPEventFacility *ef, SCCB *sccb)
|
|
|
|
{
|
|
|
|
WriteEventMask *we_mask = (WriteEventMask *) sccb;
|
|
|
|
|
|
|
|
/* 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) {
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_MASK_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* keep track of the guest's capability masks */
|
|
|
|
ef->receive_mask = be32_to_cpu(we_mask->cp_receive_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));
|
|
|
|
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
|
|
|
|
|
|
|
|
out:
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* qemu object creation and initialization functions */
|
|
|
|
|
|
|
|
#define TYPE_SCLP_EVENTS_BUS "s390-sclp-events-bus"
|
|
|
|
|
|
|
|
static void sclp_events_bus_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2013-12-23 10:25:38 +01:00
|
|
|
static const TypeInfo sclp_events_bus_info = {
|
2012-10-29 03:13:23 +01:00
|
|
|
.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)
|
|
|
|
{
|
2014-02-07 13:41:58 +01:00
|
|
|
switch (code & SCLP_CMD_CODE_MASK) {
|
2012-10-29 03:13:23 +01:00
|
|
|
case SCLP_CMD_READ_EVENT_DATA:
|
|
|
|
read_event_data(ef, sccb);
|
|
|
|
break;
|
|
|
|
case SCLP_CMD_WRITE_EVENT_DATA:
|
|
|
|
write_event_data(ef, sccb);
|
|
|
|
break;
|
|
|
|
case SCLP_CMD_WRITE_EVENT_MASK:
|
|
|
|
write_event_mask(ef, sccb);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-12-18 13:59:57 +01:00
|
|
|
static const VMStateDescription vmstate_event_facility = {
|
|
|
|
.name = "vmstate-event-facility",
|
|
|
|
.version_id = 0,
|
|
|
|
.minimum_version_id = 0,
|
|
|
|
.minimum_version_id_old = 0,
|
|
|
|
.fields = (VMStateField[]) {
|
|
|
|
VMSTATE_UINT32(receive_mask, SCLPEventFacility),
|
|
|
|
VMSTATE_END_OF_LIST()
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
2013-12-18 10:10:49 +01:00
|
|
|
static int init_event_facility(SCLPEventFacility *event_facility)
|
2012-10-29 03:13:23 +01:00
|
|
|
{
|
2013-12-18 10:10:49 +01:00
|
|
|
DeviceState *sdev = DEVICE(event_facility);
|
2012-10-29 03:13:24 +01:00
|
|
|
DeviceState *quiesce;
|
2012-10-29 03:13:23 +01:00
|
|
|
|
2013-12-18 10:10:49 +01:00
|
|
|
/* Spawn a new bus for SCLP events */
|
2013-08-24 00:02:27 +02:00
|
|
|
qbus_create_inplace(&event_facility->sbus, sizeof(event_facility->sbus),
|
2013-12-18 10:10:49 +01:00
|
|
|
TYPE_SCLP_EVENTS_BUS, sdev, NULL);
|
2012-10-29 03:13:23 +01:00
|
|
|
event_facility->sbus.qbus.allow_hotplug = 0;
|
|
|
|
|
2012-10-29 03:13:24 +01:00
|
|
|
quiesce = qdev_create(&event_facility->sbus.qbus, "sclpquiesce");
|
|
|
|
if (!quiesce) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
qdev_init_nofail(quiesce);
|
|
|
|
|
2014-01-20 20:51:50 +01:00
|
|
|
object_initialize(&cpu_hotplug, sizeof(cpu_hotplug), TYPE_SCLP_CPU_HOTPLUG);
|
|
|
|
qdev_set_parent_bus(DEVICE(&cpu_hotplug), BUS(&event_facility->sbus));
|
|
|
|
object_property_set_bool(OBJECT(&cpu_hotplug), true, "realized", NULL);
|
|
|
|
|
2012-10-29 03:13:23 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-09-04 12:55:45 +02:00
|
|
|
static void reset_event_facility(DeviceState *dev)
|
|
|
|
{
|
2013-12-18 10:10:49 +01:00
|
|
|
SCLPEventFacility *sdev = EVENT_FACILITY(dev);
|
2013-09-04 12:55:45 +02:00
|
|
|
|
2013-12-18 10:10:49 +01:00
|
|
|
sdev->receive_mask = 0;
|
2013-09-04 12:55:45 +02:00
|
|
|
}
|
|
|
|
|
2012-10-29 03:13:23 +01:00
|
|
|
static void init_event_facility_class(ObjectClass *klass, void *data)
|
|
|
|
{
|
2013-12-18 10:10:49 +01:00
|
|
|
SysBusDeviceClass *sbdc = SYS_BUS_DEVICE_CLASS(klass);
|
|
|
|
DeviceClass *dc = DEVICE_CLASS(sbdc);
|
|
|
|
SCLPEventFacilityClass *k = EVENT_FACILITY_CLASS(dc);
|
2012-10-29 03:13:23 +01:00
|
|
|
|
2013-09-04 12:55:45 +02:00
|
|
|
dc->reset = reset_event_facility;
|
2013-12-18 13:59:57 +01:00
|
|
|
dc->vmsd = &vmstate_event_facility;
|
2012-10-29 03:13:23 +01:00
|
|
|
k->init = init_event_facility;
|
2013-12-18 10:10:49 +01:00
|
|
|
k->command_handler = command_handler;
|
|
|
|
k->event_pending = event_pending;
|
2012-10-29 03:13:23 +01:00
|
|
|
}
|
|
|
|
|
2013-12-23 10:25:38 +01:00
|
|
|
static const TypeInfo sclp_event_facility_info = {
|
2013-12-18 10:10:49 +01:00
|
|
|
.name = TYPE_SCLP_EVENT_FACILITY,
|
|
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
|
|
.instance_size = sizeof(SCLPEventFacility),
|
2012-10-29 03:13:23 +01:00
|
|
|
.class_init = init_event_facility_class,
|
2013-12-18 10:10:49 +01:00
|
|
|
.class_size = sizeof(SCLPEventFacilityClass),
|
2012-10-29 03:13:23 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
static int event_qdev_init(DeviceState *qdev)
|
|
|
|
{
|
|
|
|
SCLPEvent *event = DO_UPCAST(SCLPEvent, qdev, 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);
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2013-12-23 10:25:38 +01:00
|
|
|
static const TypeInfo sclp_event_type_info = {
|
2012-10-29 03:13:23 +01:00
|
|
|
.name = TYPE_SCLP_EVENT,
|
|
|
|
.parent = TYPE_DEVICE,
|
|
|
|
.instance_size = sizeof(SCLPEvent),
|
|
|
|
.class_init = event_class_init,
|
|
|
|
.class_size = sizeof(SCLPEventClass),
|
|
|
|
.abstract = true,
|
|
|
|
};
|
|
|
|
|
|
|
|
static void register_types(void)
|
|
|
|
{
|
2013-12-23 10:25:38 +01:00
|
|
|
type_register_static(&sclp_events_bus_info);
|
|
|
|
type_register_static(&sclp_event_facility_info);
|
|
|
|
type_register_static(&sclp_event_type_info);
|
2012-10-29 03:13:23 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
type_init(register_types)
|