Merge "These changes are the raw update to qemu-2.6."

1 files changed, 206 insertions, 67 deletions

diff --git a/qemu/hw/s390x/sclp.c b/qemu/hw/s390x/sclp.c
index b3a6c5e5a..85dbe1b60 100644
--- a/qemu/hw/s390x/sclp.c
+++ b/qemu/hw/s390x/sclp.c
@@ -12,42 +12,34 @@
  *
  */
 
+#include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "cpu.h"
 #include "sysemu/kvm.h"
 #include "exec/memory.h"
 #include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
-#include "qemu/config-file.h"
+#include "hw/boards.h"
 #include "hw/s390x/sclp.h"
 #include "hw/s390x/event-facility.h"
 #include "hw/s390x/s390-pci-bus.h"
 
-static inline SCLPEventFacility *get_event_facility(void)
+static inline SCLPDevice *get_sclp_device(void)
 {
-    ObjectProperty *op = object_property_find(qdev_get_machine(),
-                                              TYPE_SCLP_EVENT_FACILITY,
-                                              NULL);
-    assert(op);
-    return op->opaque;
+    return SCLP(object_resolve_path_type("", TYPE_SCLP, NULL));
 }
 
 /* Provide information about the configuration, CPUs and storage */
-static void read_SCP_info(SCCB *sccb)
+static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
 {
     ReadInfo *read_info = (ReadInfo *) sccb;
+    MachineState *machine = MACHINE(qdev_get_machine());
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
     CPUState *cpu;
     int cpu_count = 0;
     int i = 0;
-    int increment_size = 20;
     int rnsize, rnmax;
-    QemuOpts *opts = qemu_opts_find(qemu_find_opts("memory"), NULL);
-    int slots = qemu_opt_get_number(opts, "slots", 0);
-    int max_avail_slots = s390_get_memslot_count(kvm_state);
-
-    if (slots > max_avail_slots) {
-        slots = max_avail_slots;
-    }
+    int slots = MIN(machine->ram_slots, s390_get_memslot_count(kvm_state));
 
     CPU_FOREACH(cpu) {
         cpu_count++;
@@ -66,23 +58,8 @@ static void read_SCP_info(SCCB *sccb)
     read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO |
                                         SCLP_HAS_PCI_RECONFIG);
 
-    /*
-     * The storage increment size is a multiple of 1M and is a power of 2.
-     * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
-     */
-    while ((ram_size >> increment_size) > MAX_STORAGE_INCREMENTS) {
-        increment_size++;
-    }
-    rnmax = ram_size >> increment_size;
-
     /* Memory Hotplug is only supported for the ccw machine type */
     if (mhd) {
-        while ((mhd->standby_mem_size >> increment_size) >
-               MAX_STORAGE_INCREMENTS) {
-            increment_size++;
-        }
-        assert(increment_size == mhd->increment_size);
-
         mhd->standby_subregion_size = MEM_SECTION_SIZE;
         /* Deduct the memory slot already used for core */
         if (slots > 0) {
@@ -108,13 +85,11 @@ static void read_SCP_info(SCCB *sccb)
         }
         mhd->padded_ram_size = ram_size + mhd->pad_size;
         mhd->rzm = 1 << mhd->increment_size;
-        rnmax = ((ram_size + mhd->standby_mem_size + mhd->pad_size)
-             >> mhd->increment_size);
 
         read_info->facilities |= cpu_to_be64(SCLP_FC_ASSIGN_ATTACH_READ_STOR);
     }
 
-    rnsize = 1 << (increment_size - 20);
+    rnsize = 1 << (sclp->increment_size - 20);
     if (rnsize <= 128) {
         read_info->rnsize = rnsize;
     } else {
@@ -122,6 +97,7 @@ static void read_SCP_info(SCCB *sccb)
         read_info->rnsize2 = cpu_to_be32(rnsize);
     }
 
+    rnmax = machine->maxram_size >> sclp->increment_size;
     if (rnmax < 0x10000) {
         read_info->rnmax = cpu_to_be16(rnmax);
     } else {
@@ -132,14 +108,17 @@ static void read_SCP_info(SCCB *sccb)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 }
 
-static void read_storage_element0_info(SCCB *sccb)
+static void read_storage_element0_info(SCLPDevice *sclp, SCCB *sccb)
 {
     int i, assigned;
     int subincrement_id = SCLP_STARTING_SUBINCREMENT_ID;
     ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 
-    assert(mhd);
+    if (!mhd) {
+        sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        return;
+    }
 
     if ((ram_size >> mhd->increment_size) >= 0x10000) {
         sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
@@ -158,12 +137,15 @@ static void read_storage_element0_info(SCCB *sccb)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 }
 
-static void read_storage_element1_info(SCCB *sccb)
+static void read_storage_element1_info(SCLPDevice *sclp, SCCB *sccb)
 {
     ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 
-    assert(mhd);
+    if (!mhd) {
+        sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        return;
+    }
 
     if ((mhd->standby_mem_size >> mhd->increment_size) >= 0x10000) {
         sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
@@ -179,13 +161,17 @@ static void read_storage_element1_info(SCCB *sccb)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_STANDBY_READ_COMPLETION);
 }
 
-static void attach_storage_element(SCCB *sccb, uint16_t element)
+static void attach_storage_element(SCLPDevice *sclp, SCCB *sccb,
+                                   uint16_t element)
 {
     int i, assigned, subincrement_id;
     AttachStorageElement *attach_info = (AttachStorageElement *) sccb;
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 
-    assert(mhd);
+    if (!mhd) {
+        sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        return;
+    }
 
     if (element != 1) {
         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
@@ -203,20 +189,26 @@ static void attach_storage_element(SCCB *sccb, uint16_t element)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
 }
 
-static void assign_storage(SCCB *sccb)
+static void assign_storage(SCLPDevice *sclp, SCCB *sccb)
 {
     MemoryRegion *mr = NULL;
     uint64_t this_subregion_size;
     AssignStorage *assign_info = (AssignStorage *) sccb;
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
-    assert(mhd);
-    ram_addr_t assign_addr = (assign_info->rn - 1) * mhd->rzm;
+    ram_addr_t assign_addr;
     MemoryRegion *sysmem = get_system_memory();
 
+    if (!mhd) {
+        sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        return;
+    }
+    assign_addr = (assign_info->rn - 1) * mhd->rzm;
+
     if ((assign_addr % MEM_SECTION_SIZE == 0) &&
         (assign_addr >= mhd->padded_ram_size)) {
         /* Re-use existing memory region if found */
         mr = memory_region_find(sysmem, assign_addr, 1).mr;
+        memory_region_unref(mr);
         if (!mr) {
 
             MemoryRegion *standby_ram = g_new(MemoryRegion, 1);
@@ -241,7 +233,13 @@ static void assign_storage(SCCB *sccb)
                 this_subregion_size = mhd->standby_subregion_size;
             }
 
-            memory_region_init_ram(standby_ram, NULL, id, this_subregion_size, &error_abort);
+            memory_region_init_ram(standby_ram, NULL, id, this_subregion_size,
+                                   &error_fatal);
+            /* This is a hack to make memory hotunplug work again. Once we have
+             * subdevices, we have to unparent them when unassigning memory,
+             * instead of doing it via the ref count of the MemoryRegion. */
+            object_ref(OBJECT(standby_ram));
+            object_unparent(OBJECT(standby_ram));
             vmstate_register_ram_global(standby_ram);
             memory_region_add_subregion(sysmem, offset, standby_ram);
         }
@@ -252,15 +250,20 @@ static void assign_storage(SCCB *sccb)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
 }
 
-static void unassign_storage(SCCB *sccb)
+static void unassign_storage(SCLPDevice *sclp, SCCB *sccb)
 {
     MemoryRegion *mr = NULL;
     AssignStorage *assign_info = (AssignStorage *) sccb;
     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
-    assert(mhd);
-    ram_addr_t unassign_addr = (assign_info->rn - 1) * mhd->rzm;
+    ram_addr_t unassign_addr;
     MemoryRegion *sysmem = get_system_memory();
 
+    if (!mhd) {
+        sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        return;
+    }
+    unassign_addr = (assign_info->rn - 1) * mhd->rzm;
+
     /* if the addr is a multiple of 256 MB */
     if ((unassign_addr % MEM_SECTION_SIZE == 0) &&
         (unassign_addr >= mhd->padded_ram_size)) {
@@ -269,6 +272,7 @@ static void unassign_storage(SCCB *sccb)
 
         /* find the specified memory region and destroy it */
         mr = memory_region_find(sysmem, unassign_addr, 1).mr;
+        memory_region_unref(mr);
         if (mr) {
             int i;
             int is_removable = 1;
@@ -287,8 +291,7 @@ static void unassign_storage(SCCB *sccb)
             }
             if (is_removable) {
                 memory_region_del_subregion(sysmem, mr);
-                object_unparent(OBJECT(mr));
-                g_free(mr);
+                object_unref(OBJECT(mr));
             }
         }
     }
@@ -296,7 +299,7 @@ static void unassign_storage(SCCB *sccb)
 }
 
 /* Provide information about the CPU */
-static void sclp_read_cpu_info(SCCB *sccb)
+static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb)
 {
     ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
     CPUState *cpu;
@@ -323,34 +326,35 @@ static void sclp_read_cpu_info(SCCB *sccb)
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 }
 
-static void sclp_execute(SCCB *sccb, uint32_t code)
+static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
 {
-    SCLPEventFacility *ef = get_event_facility();
+    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
+    SCLPEventFacility *ef = sclp->event_facility;
     SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
 
     switch (code & SCLP_CMD_CODE_MASK) {
     case SCLP_CMDW_READ_SCP_INFO:
     case SCLP_CMDW_READ_SCP_INFO_FORCED:
-        read_SCP_info(sccb);
+        sclp_c->read_SCP_info(sclp, sccb);
         break;
     case SCLP_CMDW_READ_CPU_INFO:
-        sclp_read_cpu_info(sccb);
+        sclp_c->read_cpu_info(sclp, sccb);
         break;
     case SCLP_READ_STORAGE_ELEMENT_INFO:
         if (code & 0xff00) {
-            read_storage_element1_info(sccb);
+            sclp_c->read_storage_element1_info(sclp, sccb);
         } else {
-            read_storage_element0_info(sccb);
+            sclp_c->read_storage_element0_info(sclp, sccb);
         }
         break;
     case SCLP_ATTACH_STORAGE_ELEMENT:
-        attach_storage_element(sccb, (code & 0xff00) >> 8);
+        sclp_c->attach_storage_element(sclp, sccb, (code & 0xff00) >> 8);
         break;
     case SCLP_ASSIGN_STORAGE:
-        assign_storage(sccb);
+        sclp_c->assign_storage(sclp, sccb);
         break;
     case SCLP_UNASSIGN_STORAGE:
-        unassign_storage(sccb);
+        sclp_c->unassign_storage(sclp, sccb);
         break;
     case SCLP_CMDW_CONFIGURE_PCI:
         s390_pci_sclp_configure(1, sccb);
@@ -366,6 +370,8 @@ static void sclp_execute(SCCB *sccb, uint32_t code)
 
 int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
 {
+    SCLPDevice *sclp = get_sclp_device();
+    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
     int r = 0;
     SCCB work_sccb;
 
@@ -400,20 +406,20 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
         goto out;
     }
 
-    sclp_execute((SCCB *)&work_sccb, code);
+    sclp_c->execute(sclp, (SCCB *)&work_sccb, code);
 
     cpu_physical_memory_write(sccb, &work_sccb,
                               be16_to_cpu(work_sccb.h.length));
 
-    sclp_service_interrupt(sccb);
+    sclp_c->service_interrupt(sclp, sccb);
 
 out:
     return r;
 }
 
-void sclp_service_interrupt(uint32_t sccb)
+static void service_interrupt(SCLPDevice *sclp, uint32_t sccb)
 {
-    SCLPEventFacility *ef = get_event_facility();
+    SCLPEventFacility *ef = sclp->event_facility;
     SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
 
     uint32_t param = sccb & ~3;
@@ -428,17 +434,149 @@ void sclp_service_interrupt(uint32_t sccb)
     s390_sclp_extint(param);
 }
 
+void sclp_service_interrupt(uint32_t sccb)
+{
+    SCLPDevice *sclp = get_sclp_device();
+    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
+
+    sclp_c->service_interrupt(sclp, sccb);
+}
+
 /* qemu object creation and initialization functions */
 
 void s390_sclp_init(void)
 {
-    DeviceState *dev  = qdev_create(NULL, TYPE_SCLP_EVENT_FACILITY);
+    Object *new = object_new(TYPE_SCLP);
 
-    object_property_add_child(qdev_get_machine(), TYPE_SCLP_EVENT_FACILITY,
-                              OBJECT(dev), NULL);
-    qdev_init_nofail(dev);
+    object_property_add_child(qdev_get_machine(), TYPE_SCLP, new,
+                              NULL);
+    object_unref(OBJECT(new));
+    qdev_init_nofail(DEVICE(new));
 }
 
+static void sclp_realize(DeviceState *dev, Error **errp)
+{
+    MachineState *machine = MACHINE(qdev_get_machine());
+    SCLPDevice *sclp = SCLP(dev);
+    Error *err = NULL;
+    uint64_t hw_limit;
+    int ret;
+
+    object_property_set_bool(OBJECT(sclp->event_facility), true, "realized",
+                             &err);
+    if (err) {
+        goto out;
+    }
+    /*
+     * qdev_device_add searches the sysbus for TYPE_SCLP_EVENTS_BUS. As long
+     * as we can't find a fitting bus via the qom tree, we have to add the
+     * event facility to the sysbus, so e.g. a sclp console can be created.
+     */
+    qdev_set_parent_bus(DEVICE(sclp->event_facility), sysbus_get_default());
+
+    ret = s390_set_memory_limit(machine->maxram_size, &hw_limit);
+    if (ret == -E2BIG) {
+        error_setg(&err, "qemu: host supports a maximum of %" PRIu64 " GB",
+                   hw_limit >> 30);
+    } else if (ret) {
+        error_setg(&err, "qemu: setting the guest size failed");
+    }
+
+out:
+    error_propagate(errp, err);
+}
+
+static void sclp_memory_init(SCLPDevice *sclp)
+{
+    MachineState *machine = MACHINE(qdev_get_machine());
+    ram_addr_t initial_mem = machine->ram_size;
+    ram_addr_t max_mem = machine->maxram_size;
+    ram_addr_t standby_mem = max_mem - initial_mem;
+    ram_addr_t pad_mem = 0;
+    int increment_size = 20;
+
+    /* The storage increment size is a multiple of 1M and is a power of 2.
+     * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
+     * The variable 'increment_size' is an exponent of 2 that can be
+     * used to calculate the size (in bytes) of an increment. */
+    while ((initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
+        increment_size++;
+    }
+    if (machine->ram_slots) {
+        while ((standby_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
+            increment_size++;
+        }
+    }
+    sclp->increment_size = increment_size;
+
+    /* The core and standby memory areas need to be aligned with
+     * the increment size.  In effect, this can cause the
+     * user-specified memory size to be rounded down to align
+     * with the nearest increment boundary. */
+    initial_mem = initial_mem >> increment_size << increment_size;
+    standby_mem = standby_mem >> increment_size << increment_size;
+
+    /* If the size of ram is not on a MEM_SECTION_SIZE boundary,
+       calculate the pad size necessary to force this boundary. */
+    if (machine->ram_slots && standby_mem) {
+        sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev();
+
+        if (initial_mem % MEM_SECTION_SIZE) {
+            pad_mem = MEM_SECTION_SIZE - initial_mem % MEM_SECTION_SIZE;
+        }
+        mhd->increment_size = increment_size;
+        mhd->pad_size = pad_mem;
+        mhd->standby_mem_size = standby_mem;
+    }
+    machine->ram_size = initial_mem;
+    machine->maxram_size = initial_mem + pad_mem + standby_mem;
+    /* let's propagate the changed ram size into the global variable. */
+    ram_size = initial_mem;
+}
+
+static void sclp_init(Object *obj)
+{
+    SCLPDevice *sclp = SCLP(obj);
+    Object *new;
+
+    new = object_new(TYPE_SCLP_EVENT_FACILITY);
+    object_property_add_child(obj, TYPE_SCLP_EVENT_FACILITY, new, NULL);
+    object_unref(new);
+    sclp->event_facility = EVENT_FACILITY(new);
+
+    sclp_memory_init(sclp);
+}
+
+static void sclp_class_init(ObjectClass *oc, void *data)
+{
+    SCLPDeviceClass *sc = SCLP_CLASS(oc);
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->desc = "SCLP (Service-Call Logical Processor)";
+    dc->realize = sclp_realize;
+    dc->hotpluggable = false;
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+
+    sc->read_SCP_info = read_SCP_info;
+    sc->read_storage_element0_info = read_storage_element0_info;
+    sc->read_storage_element1_info = read_storage_element1_info;
+    sc->attach_storage_element = attach_storage_element;
+    sc->assign_storage = assign_storage;
+    sc->unassign_storage = unassign_storage;
+    sc->read_cpu_info = sclp_read_cpu_info;
+    sc->execute = sclp_execute;
+    sc->service_interrupt = service_interrupt;
+}
+
+static TypeInfo sclp_info = {
+    .name = TYPE_SCLP,
+    .parent = TYPE_DEVICE,
+    .instance_init = sclp_init,
+    .instance_size = sizeof(SCLPDevice),
+    .class_init = sclp_class_init,
+    .class_size = sizeof(SCLPDeviceClass),
+};
+
 sclpMemoryHotplugDev *init_sclp_memory_hotplug_dev(void)
 {
     DeviceState *dev;
@@ -475,5 +613,6 @@ static TypeInfo sclp_memory_hotplug_dev_info = {
 static void register_types(void)
 {
     type_register_static(&sclp_memory_hotplug_dev_info);
+    type_register_static(&sclp_info);
 }
 type_init(register_types);