#include "qemu/osdep.h"
#include "qapi/error.h"
-#include "sysemu/sysemu.h"
+#include "qemu/module.h"
#include "hw/s390x/sclp.h"
+#include "migration/vmstate.h"
#include "hw/s390x/event-facility.h"
typedef struct SCLPEventsBus {
BusState qbus;
} 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 {
SysBusDevice parent_obj;
SCLPEventsBus sbus;
- /* guest' receive mask */
- unsigned int receive_mask;
+ SCLPEvent quiesce, cpu_hotplug;
+ /* 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;
{
if (sccb->h.function_code != SCLP_FC_NORMAL_WRITE) {
sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_FUNCTION);
- goto out;
+ return;
}
if (be16_to_cpu(sccb->h.length) < 8) {
sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
- goto out;
+ return;
}
/* first do a sanity check of the write events */
sccb->h.response_code = cpu_to_be16(write_event_length_check(sccb));
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)
+ 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;
if (be16_to_cpu(sccb->h.length) != SCCB_SIZE) {
sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
- goto out;
+ return;
}
- 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;
+ sccb->h.response_code = cpu_to_be16(
+ handle_sccb_read_events(ef, sccb, ef->receive_mask));
break;
case SCLP_SELECTIVE_READ:
- sclp_active_selection_mask = be32_to_cpu(red->mask);
+ /* get active selection mask */
+ sclp_cp_receive_mask = ef->receive_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;
+ } else {
+ sccb->h.response_code = cpu_to_be16(
+ handle_sccb_read_events(ef, sccb, sclp_active_selection_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;
-}
-
-/* copy up to dst_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;
}
}
{
WriteEventMask *we_mask = (WriteEventMask *) sccb;
uint16_t mask_length = be16_to_cpu(we_mask->mask_length);
- uint32_t tmp_mask;
+ sccb_mask_t tmp_mask;
- if (!mask_length || (mask_length > SCLP_EVENT_MASK_LEN_MAX)) {
+ 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;
+ return;
}
/*
- * Note: We currently only support masks up to 4 byte length;
- * the remainder is filled up with zeroes. Linux uses
- * a 4 byte mask length.
+ * 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 */
copy_mask((uint8_t *)&tmp_mask, WEM_CP_RECEIVE_MASK(we_mask, mask_length),
sizeof(tmp_mask), mask_length);
- ef->receive_mask = be32_to_cpu(tmp_mask);
+ ef->receive_mask = be64_to_cpu(tmp_mask);
/* return the SCLP's capability masks to the guest */
- tmp_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_be32(get_host_send_mask(ef));
+ 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);
-
-out:
- return;
+ ef->mask_length = mask_length;
}
/* qemu object creation and initialization functions */
#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 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)
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 bool vmstate_event_facility_mask64_needed(void *opaque)
+{
+ SCLPEventFacility *ef = opaque;
+
+ return (ef->receive_mask & 0xFFFFFFFF) != 0;
+}
+
+static bool vmstate_event_facility_mask_length_needed(void *opaque)
+{
+ SCLPEventFacility *ef = opaque;
+
+ 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()
+ }
+};
+
static const VMStateDescription vmstate_event_facility = {
.name = "vmstate-event-facility",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
- VMSTATE_UINT32(receive_mask, SCLPEventFacility),
+ 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 **errp)
+{
+ 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);
/* 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);
+ object_initialize_child(obj, TYPE_SCLP_QUIESCE,
+ &event_facility->quiesce,
+ TYPE_SCLP_QUIESCE);
+
+ object_initialize_child(obj, TYPE_SCLP_CPU_HOTPLUG,
+ &event_facility->cpu_hotplug,
+ TYPE_SCLP_CPU_HOTPLUG);
+}
+
+static void realize_event_facility(DeviceState *dev, Error **errp)
+{
+ SCLPEventFacility *event_facility = EVENT_FACILITY(dev);
+ Error *local_err = NULL;
- 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 */
+ if (!qdev_realize(DEVICE(&event_facility->quiesce),
+ BUS(&event_facility->sbus), &local_err)) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ if (!qdev_realize(DEVICE(&event_facility->cpu_hotplug),
+ BUS(&event_facility->sbus), &local_err)) {
+ error_propagate(errp, local_err);
+ qdev_unrealize(DEVICE(&event_facility->quiesce));
+ return;
+ }
}
static void reset_event_facility(DeviceState *dev)
DeviceClass *dc = DEVICE_CLASS(sbdc);
SCLPEventFacilityClass *k = EVENT_FACILITY_CLASS(dc);
+ dc->realize = realize_event_facility;
dc->reset = reset_event_facility;
dc->vmsd = &vmstate_event_facility;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}
}
-static void event_unrealize(DeviceState *qdev, Error **errp)
-{
- SCLPEvent *event = SCLP_EVENT(qdev);
- SCLPEventClass *child = SCLP_EVENT_GET_CLASS(event);
- if (child->exit) {
- int rc = child->exit(event);
- if (rc < 0) {
- error_setg(errp, "SCLP event exit failed.");
- return;
- }
- }
-}
-
static void event_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->bus_type = TYPE_SCLP_EVENTS_BUS;
dc->realize = event_realize;
- dc->unrealize = event_unrealize;
}
static const TypeInfo 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 / mirror_qemu.git / blobdiff