@@ -32,6 +32,7 @@
#include "exec-memory.h"
#include "hw/s390-virtio-bus.h"
+#include "hw/s390x/sclp.h"
//#define DEBUG_S390
@@ -184,6 +185,7 @@ static void s390_init(QEMUMachineInitArgs *args)
/* get a BUS */
s390_bus = s390_virtio_bus_init(&my_ram_size);
+ s390_sclp_init();
/* allocate RAM */
memory_region_init_ram(ram, "s390.ram", my_ram_size);
@@ -2,3 +2,4 @@ obj-y = s390-virtio-bus.o s390-virtio.o
obj-y := $(addprefix ../,$(obj-y))
obj-y += sclp.o
+obj-y += event-facility.o
new file mode 100644
@@ -0,0 +1,391 @@
+/*
+ * 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.
+ *
+ */
+
+#include "monitor.h"
+#include "sysemu.h"
+
+#include "sclp.h"
+#include "event-facility.h"
+
+typedef struct EventTypesBus {
+ BusState qbus;
+} EventTypesBus;
+
+struct SCLPEventFacility {
+ EventTypesBus sbus;
+ DeviceState *qdev;
+ /* guest' receive mask */
+ unsigned int receive_mask;
+};
+
+/* 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;
+
+ QTAILQ_FOREACH(kid, &ef->sbus.qbus.children, sibling) {
+ DeviceState *qdev = kid->child;
+ event = (SCLPEvent *) qdev;
+ ec = SCLP_EVENT_GET_CLASS(event);
+
+ rc = SCLP_RC_INVALID_FUNCTION;
+ if (ec->write_event_data &&
+ ec->event_type() == event_buf->type) {
+ 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;
+ unsigned elen = 0;
+ 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)) {
+ rc = SCLP_RC_NORMAL_COMPLETION;
+ }
+ }
+ elen = be16_to_cpu(event_buf->length);
+ event_buf = (void *) event_buf + elen;
+ }
+
+ 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)
+{
+}
+
+static const TypeInfo s390_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) {
+ 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;
+ }
+}
+
+static int init_event_facility(S390SCLPDevice *sdev)
+{
+ SCLPEventFacility *event_facility;
+
+ event_facility = g_malloc0(sizeof(SCLPEventFacility));
+ sdev->ef = event_facility;
+ sdev->sclp_command_handler = command_handler;
+ sdev->event_pending = event_pending;
+
+ /* Spawn a new sclp-events facility */
+ qbus_create_inplace(&event_facility->sbus.qbus,
+ TYPE_SCLP_EVENTS_BUS, (DeviceState *)sdev, NULL);
+ event_facility->sbus.qbus.allow_hotplug = 0;
+ event_facility->qdev = (DeviceState *) sdev;
+
+ return 0;
+}
+
+static void init_event_facility_class(ObjectClass *klass, void *data)
+{
+ S390SCLPDeviceClass *k = SCLP_S390_DEVICE_CLASS(klass);
+
+ k->init = init_event_facility;
+}
+
+static TypeInfo s390_sclp_event_facility_info = {
+ .name = "s390-sclp-event-facility",
+ .parent = TYPE_DEVICE_S390_SCLP,
+ .instance_size = sizeof(S390SCLPDevice),
+ .class_init = init_event_facility_class,
+};
+
+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;
+}
+
+static TypeInfo s390_sclp_event_type_info = {
+ .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)
+{
+ 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_init(register_types)
new file mode 100644
@@ -0,0 +1,96 @@
+/*
+ * SCLP
+ * Event Facility definitions
+ *
+ * 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.
+ *
+ */
+
+#ifndef HW_S390_SCLP_EVENT_FACILITY_H
+#define HW_S390_SCLP_EVENT_FACILITY_H
+
+#include <hw/qdev.h>
+#include "qemu-thread.h"
+
+/* SCLP event types */
+#define SCLP_EVENT_ASCII_CONSOLE_DATA 0x1a
+#define SCLP_EVENT_SIGNAL_QUIESCE 0x1d
+
+/* SCLP event masks */
+#define SCLP_EVENT_MASK_SIGNAL_QUIESCE 0x00000008
+#define SCLP_EVENT_MASK_MSG_ASCII 0x00000040
+
+#define SCLP_UNCONDITIONAL_READ 0x00
+#define SCLP_SELECTIVE_READ 0x01
+
+#define TYPE_SCLP_EVENT "s390-sclp-event-type"
+#define SCLP_EVENT(obj) \
+ OBJECT_CHECK(SCLPEvent, (obj), TYPE_SCLP_EVENT)
+#define SCLP_EVENT_CLASS(klass) \
+ OBJECT_CLASS_CHECK(SCLPEventClass, (klass), TYPE_SCLP_EVENT)
+#define SCLP_EVENT_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(SCLPEventClass, (obj), TYPE_SCLP_EVENT)
+
+typedef struct WriteEventMask {
+ SCCBHeader h;
+ uint16_t _reserved;
+ uint16_t mask_length;
+ uint32_t cp_receive_mask;
+ uint32_t cp_send_mask;
+ uint32_t send_mask;
+ uint32_t receive_mask;
+} QEMU_PACKED WriteEventMask;
+
+typedef struct EventBufferHeader {
+ uint16_t length;
+ uint8_t type;
+ uint8_t flags;
+ uint16_t _reserved;
+} QEMU_PACKED EventBufferHeader;
+
+typedef struct WriteEventData {
+ SCCBHeader h;
+ EventBufferHeader ebh;
+} QEMU_PACKED WriteEventData;
+
+typedef struct ReadEventData {
+ SCCBHeader h;
+ EventBufferHeader ebh;
+ uint32_t mask;
+} QEMU_PACKED ReadEventData;
+
+typedef struct SCLPEvent {
+ DeviceState qdev;
+ bool event_pending;
+ uint32_t event_type;
+ char *name;
+} SCLPEvent;
+
+typedef struct SCLPEventClass {
+ DeviceClass parent_class;
+ int (*init)(SCLPEvent *event);
+ int (*exit)(SCLPEvent *event);
+
+ /* get SCLP's send mask */
+ unsigned int (*get_send_mask)(void);
+
+ /* get SCLP's receive mask */
+ unsigned int (*get_receive_mask)(void);
+
+ int (*read_event_data)(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
+ int *slen);
+
+ int (*write_event_data)(SCLPEvent *event, EventBufferHeader *evt_buf_hdr);
+
+ /* returns the supported event type */
+ int (*event_type)(void);
+
+} SCLPEventClass;
+
+#endif
@@ -18,6 +18,15 @@
#include "sclp.h"
+static inline S390SCLPDevice *get_event_facility(void)
+{
+ ObjectProperty *op = object_property_find(qdev_get_machine(),
+ "s390-sclp-event-facility",
+ NULL);
+ assert(op);
+ return op->opaque;
+}
+
/* Provide information about the configuration, CPUs and storage */
static void read_SCP_info(SCCB *sccb)
{
@@ -34,13 +43,15 @@ static void read_SCP_info(SCCB *sccb)
static void sclp_execute(SCCB *sccb, uint64_t code)
{
+ S390SCLPDevice *sdev = get_event_facility();
+
switch (code) {
case SCLP_CMDW_READ_SCP_INFO:
case SCLP_CMDW_READ_SCP_INFO_FORCED:
read_SCP_info(sccb);
break;
default:
- sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+ sdev->sclp_command_handler(sdev->ef, sccb, code);
break;
}
}
@@ -89,11 +100,45 @@ out:
void sclp_service_interrupt(uint32_t sccb)
{
- s390_sclp_extint(sccb & ~3);
+ S390SCLPDevice *sdev = get_event_facility();
+ uint32_t param = sccb & ~3;
+
+ /* Indicate whether an event is still pending */
+ param |= sdev->event_pending(sdev->ef) ? 1 : 0;
+
+ if (!param) {
+ /* No need to send an interrupt, there's nothing to be notified about */
+ return;
+ }
+ s390_sclp_extint(param);
}
/* qemu object creation and initialization functions */
+void s390_sclp_init(void)
+{
+ DeviceState *dev = qdev_create(NULL, "s390-sclp-event-facility");
+
+ object_property_add_child(qdev_get_machine(), "s390-sclp-event-facility",
+ OBJECT(dev), NULL);
+ qdev_init_nofail(dev);
+}
+
+static int s390_sclp_dev_init(SysBusDevice *dev)
+{
+ int r;
+ S390SCLPDevice *sdev = (S390SCLPDevice *)dev;
+ S390SCLPDeviceClass *sclp = SCLP_S390_DEVICE_GET_CLASS(dev);
+
+ r = sclp->init(sdev);
+ if (!r) {
+ assert(sdev->event_pending);
+ assert(sdev->sclp_command_handler);
+ }
+
+ return r;
+}
+
static void s390_sclp_device_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *dc = SYS_BUS_DEVICE_CLASS(klass);
@@ -20,15 +20,35 @@
/* SCLP command codes */
#define SCLP_CMDW_READ_SCP_INFO 0x00020001
#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
+#define SCLP_CMD_READ_EVENT_DATA 0x00770005
+#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
+#define SCLP_CMD_READ_EVENT_DATA 0x00770005
+#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
+#define SCLP_CMD_WRITE_EVENT_MASK 0x00780005
/* SCLP response codes */
#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
+#define SCLP_RC_NORMAL_COMPLETION 0x0020
#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
+#define SCLP_RC_CONTAINED_EQUIPMENT_CHECK 0x0340
+#define SCLP_RC_INSUFFICIENT_SCCB_LENGTH 0x0300
+#define SCLP_RC_INVALID_FUNCTION 0x40f0
+#define SCLP_RC_NO_EVENT_BUFFERS_STORED 0x60f0
+#define SCLP_RC_INVALID_SELECTION_MASK 0x70f0
+#define SCLP_RC_INCONSISTENT_LENGTHS 0x72f0
+#define SCLP_RC_EVENT_BUFFER_SYNTAX_ERROR 0x73f0
+#define SCLP_RC_INVALID_MASK_LENGTH 0x74f0
+
/* Service Call Control Block (SCCB) and its elements */
#define SCCB_SIZE 4096
+#define SCLP_VARIABLE_LENGTH_RESPONSE 0x80
+#define SCLP_EVENT_BUFFER_ACCEPTED 0x80
+
+#define SCLP_FC_NORMAL_WRITE 0
+
/*
* Normally packed structures are not the right thing to do, since all code
* must take care of endianess. We cant use ldl_phys and friends for two
@@ -62,8 +82,29 @@ typedef struct SCCB {
char data[SCCB_DATA_LEN];
} QEMU_PACKED SCCB;
+static inline int sccb_data_len(SCCB *sccb)
+{
+ return be16_to_cpu(sccb->h.length) - sizeof(sccb->h);
+}
+
+#define TYPE_DEVICE_S390_SCLP "s390-sclp-device"
+#define SCLP_S390_DEVICE(obj) \
+ OBJECT_CHECK(S390SCLPDevice, (obj), TYPE_DEVICE_S390_SCLP)
+#define SCLP_S390_DEVICE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(S390SCLPDeviceClass, (klass), \
+ TYPE_DEVICE_S390_SCLP)
+#define SCLP_S390_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(S390SCLPDeviceClass, (obj), \
+ TYPE_DEVICE_S390_SCLP)
+
+typedef struct SCLPEventFacility SCLPEventFacility;
+
typedef struct S390SCLPDevice {
SysBusDevice busdev;
+ SCLPEventFacility *ef;
+ void (*sclp_command_handler)(SCLPEventFacility *ef, SCCB *sccb,
+ uint64_t code);
+ bool (*event_pending)(SCLPEventFacility *ef);
} S390SCLPDevice;
typedef struct S390SCLPDeviceClass {
@@ -71,6 +112,7 @@ typedef struct S390SCLPDeviceClass {
int (*init)(S390SCLPDevice *sdev);
} S390SCLPDeviceClass;
+void s390_sclp_init(void);
void sclp_service_interrupt(uint32_t sccb);
#endif