Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20160919' into staging

Couple of s390x patches:
- fixup for the cpu model patches
- support for virtio 1.1 READ_STATUS command
- update MAINTAINERS file pattern

# gpg: Signature made Mon 19 Sep 2016 10:11:06 BST
# gpg:                using RSA key 0xDECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20160919:
  QMP: fixup typos and whitespace damage
  virtio-ccw: set revision 2 as maximal revision number
  virtio-ccw: respond to READ_STATUS command
  MAINTAINERS: update s390 machine file patterns
  s390x/kvm: disable cpu model for the 2.7 machine

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

7 files changed, 50 insertions, 6 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index e1d4589..3e106c8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -669,6 +669,9 @@ F: hw/s390x/
 F: include/hw/s390x/
 F: pc-bios/s390-ccw/
 F: hw/watchdog/wdt_diag288.c
+F: include/hw/watchdog/wdt_diag288.h
+F: pc-bios/s390-ccw.img
+F: default-configs/s390x-softmmu.mak
 T: git git://github.com/cohuck/qemu.git s390-next
 T: git git://github.com/borntraeger/qemu.git s390-next
 
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index a63b4e8..e340eab 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -193,6 +193,7 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data)
     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 
     s390mc->ri_allowed = true;
+    s390mc->cpu_model_allowed = true;
     mc->init = ccw_init;
     mc->reset = s390_machine_reset;
     mc->hot_add_cpu = s390_hot_add_cpu;
@@ -258,6 +259,19 @@ bool ri_allowed(void)
     return 0;
 }
 
+bool cpu_model_allowed(void)
+{
+    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+    if (object_class_dynamic_cast(OBJECT_CLASS(mc),
+                                  TYPE_S390_CCW_MACHINE)) {
+        S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
+
+        return s390mc->cpu_model_allowed;
+    }
+    /* allow CPU model qmp queries with the "none" machine */
+    return true;
+}
+
 static inline void s390_machine_initfn(Object *obj)
 {
     object_property_add_bool(obj, "aes-key-wrap",
@@ -397,6 +411,9 @@ static void ccw_machine_2_7_instance_options(MachineState *machine)
 
 static void ccw_machine_2_7_class_options(MachineClass *mc)
 {
+    S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
+
+    s390mc->cpu_model_allowed = false;
     ccw_machine_2_8_class_options(mc);
     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 }
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 9f3f386..ee136ab 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -455,6 +455,26 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
             }
         }
         break;
+    case CCW_CMD_READ_STATUS:
+        if (check_len) {
+            if (ccw.count != sizeof(status)) {
+                ret = -EINVAL;
+                break;
+            }
+        } else if (ccw.count < sizeof(status)) {
+            /* Can't execute command. */
+            ret = -EINVAL;
+            break;
+        }
+        if (!ccw.cda) {
+            ret = -EFAULT;
+        } else {
+            address_space_stb(&address_space_memory, ccw.cda, vdev->status,
+                                        MEMTXATTRS_UNSPECIFIED, NULL);
+            sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);;
+            ret = 0;
+        }
+        break;
     case CCW_CMD_WRITE_STATUS:
         if (check_len) {
             if (ccw.count != sizeof(status)) {
diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index b58ab21..565094e 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -45,6 +45,7 @@
 #define CCW_CMD_SET_IND      0x43
 #define CCW_CMD_SET_CONF_IND 0x53
 #define CCW_CMD_READ_VQ_CONF 0x32
+#define CCW_CMD_READ_STATUS  0x72
 #define CCW_CMD_SET_IND_ADAPTER 0x73
 #define CCW_CMD_SET_VIRTIO_REV 0x83
 
@@ -98,7 +99,7 @@ struct VirtioCcwDevice {
 };
 
 /* The maximum virtio revision we support. */
-#define VIRTIO_CCW_MAX_REV 1
+#define VIRTIO_CCW_MAX_REV 2
 static inline int virtio_ccw_rev_max(VirtioCcwDevice *dev)
 {
     return dev->max_rev;
diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h
index a0c1fc8..6ecae00 100644
--- a/include/hw/s390x/s390-virtio-ccw.h
+++ b/include/hw/s390x/s390-virtio-ccw.h
@@ -36,9 +36,12 @@ typedef struct S390CcwMachineClass {
 
     /*< public >*/
     bool ri_allowed;
+    bool cpu_model_allowed;
 } S390CcwMachineClass;
 
 /* runtime-instrumentation allowed by the machine */
 bool ri_allowed(void);
+/* cpu model allowed by the machine */
+bool cpu_model_allowed(void);
 
 #endif
diff --git a/qapi-schema.json b/qapi-schema.json
index c4f3674..f1a79f5 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3163,7 +3163,7 @@
 # @CpuModelCompareResult:
 #
 # An enumeration of CPU model comparation results. The result is usually
-# calcualted using e.g. CPU features or CPU generations.
+# calculated using e.g. CPU features or CPU generations.
 #
 # @incompatible: If model A is incompatible to model B, model A is not
 #                guaranteed to run where model B runs and the other way around.
@@ -3216,14 +3216,14 @@
 # CPU model has to be created by baselining.
 #
 # Usually, a CPU model is compared against the maximum possible CPU model
-# of a ceratin configuration (e.g. the "host" model for KVM). If that CPU
+# of a certain configuration (e.g. the "host" model for KVM). If that CPU
 # model is identical or a subset, it will run in that configuration.
 #
 # The result returned by this command may be affected by:
 #
 # * QEMU version: CPU models may look different depending on the QEMU version.
 #   (Except for CPU models reported as "static" in query-cpu-definitions.)
-# * machine-type: CPU model  may look different depending on the machine-type.
+# * machine-type: CPU model may look different depending on the machine-type.
 #   (Except for CPU models reported as "static" in query-cpu-definitions.)
 # * machine options (including accelerator): in some architectures, CPU models
 #   may look different depending on machine and accelerator options. (Except for
@@ -3274,7 +3274,7 @@
 #
 # * QEMU version: CPU models may look different depending on the QEMU version.
 #   (Except for CPU models reported as "static" in query-cpu-definitions.)
-# * machine-type: CPU model  may look different depending on the machine-type.
+# * machine-type: CPU model may look different depending on the machine-type.
 #   (Except for CPU models reported as "static" in query-cpu-definitions.)
 # * machine options (including accelerator): in some architectures, CPU models
 #   may look different depending on machine and accelerator options. (Except for
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index dfaf1ca..4b847a3 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -2490,7 +2490,7 @@ static int configure_cpu_feat(const S390FeatBitmap features)
 
 bool kvm_s390_cpu_models_supported(void)
 {
-    if (!ri_allowed()) {
+    if (!cpu_model_allowed()) {
         /* compatibility machines interfere with the cpu model */
         return false;
     }