s390x/cpumodel: add zpci, aen and ais facilities

[qemu.git] / hw / s390x / css-bridge.c

diff --git a/hw/s390x/css-bridge.c b/hw/s390x/css-bridge.c
index e74cc1cfdabc97bf0a74828506026a6859b0091c..c4a9735d710815e7a1db58374dd34c73bee998e1 100644 (file)
--- a/hw/s390x/css-bridge.c
+++ b/hw/s390x/css-bridge.c
@@ -11,12 +11,48 @@
  */
 #include "qemu/osdep.h"
 #include "qapi/error.h"
-#include "virtio-ccw.h"
 #include "hw/hotplug.h"
 #include "hw/sysbus.h"
 #include "qemu/bitops.h"
 #include "hw/s390x/css.h"
+#include "ccw-device.h"
 #include "hw/s390x/css-bridge.h"
+#include "cpu.h"
+
+/*
+ * Invoke device-specific unplug handler, disable the subchannel
+ * (including sending a channel report to the guest) and remove the
+ * device from the virtual css bus.
+ */
+static void ccw_device_unplug(HotplugHandler *hotplug_dev,
+                              DeviceState *dev, Error **errp)
+{
+    CcwDevice *ccw_dev = CCW_DEVICE(dev);
+    CCWDeviceClass *k = CCW_DEVICE_GET_CLASS(ccw_dev);
+    SubchDev *sch = ccw_dev->sch;
+    Error *err = NULL;
+
+    if (k->unplug) {
+        k->unplug(hotplug_dev, dev, &err);
+        if (err) {
+            error_propagate(errp, err);
+            return;
+        }
+    }
+
+    /*
+     * We should arrive here only for device_del, since we don't support
+     * direct hot(un)plug of channels.
+     */
+    assert(sch != NULL);
+    /* Subchannel is now disabled and no longer valid. */
+    sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
+                                     PMCW_FLAGS_MASK_DNV);
+
+    css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
+
+    object_unparent(OBJECT(dev));
+}
 
 static void virtual_css_bus_reset(BusState *qbus)
 {
@@ -24,11 +60,28 @@ static void virtual_css_bus_reset(BusState *qbus)
     css_reset();
 }
 
+static char *virtual_css_bus_get_dev_path(DeviceState *dev)
+{
+    CcwDevice *ccw_dev = CCW_DEVICE(dev);
+    SubchDev *sch = ccw_dev->sch;
+    VirtualCssBridge *bridge =
+        VIRTUAL_CSS_BRIDGE(qdev_get_parent_bus(dev)->parent);
+
+    /*
+     * We can't provide a dev path for backward compatibility on
+     * older machines, as it is visible in the migration stream.
+     */
+    return bridge->css_dev_path ?
+        g_strdup_printf("/%02x.%1x.%04x", sch->cssid, sch->ssid, sch->devno) :
+        NULL;
+}
+
 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
     k->reset = virtual_css_bus_reset;
+    k->get_dev_path = virtual_css_bus_get_dev_path;
 }
 
 static const TypeInfo virtual_css_bus_info = {
@@ -51,28 +104,39 @@ VirtualCssBus *virtual_css_bus_init(void)
     /* Create bus on bridge device */
     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
     cbus = VIRTUAL_CSS_BUS(bus);
+    cbus->squash_mcss = s390_get_squash_mcss();
 
     /* Enable hotplugging */
     qbus_set_hotplug_handler(bus, dev, &error_abort);
 
+    css_register_io_adapters(CSS_IO_ADAPTER_VIRTIO, true, false,
+                             0, &error_abort);
+
     return cbus;
  }
 
 /***************** Virtual-css Bus Bridge Device ********************/
 
+static Property virtual_css_bridge_properties[] = {
+    DEFINE_PROP_BOOL("css_dev_path", VirtualCssBridge, css_dev_path,
+                     true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
 {
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    hc->unplug = virtio_ccw_busdev_unplug;
+    hc->unplug = ccw_device_unplug;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+    dc->props = virtual_css_bridge_properties;
 }
 
 static const TypeInfo virtual_css_bridge_info = {
     .name          = TYPE_VIRTUAL_CSS_BRIDGE,
     .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(SysBusDevice),
+    .instance_size = sizeof(VirtualCssBridge),
     .class_init    = virtual_css_bridge_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },