Last round of s390x patches for 2.7:

- A large update of the s390x PCI code, bringing it in line with
   the architecture
 - Fixes and improvements in the ipl (boot) code
 - Refactoring in the css code
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Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20160711' into staging

Last round of s390x patches for 2.7:
- A large update of the s390x PCI code, bringing it in line with
  the architecture
- Fixes and improvements in the ipl (boot) code
- Refactoring in the css code

# gpg: Signature made Mon 11 Jul 2016 09:04:51 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-20160711: (25 commits)
  s390x/pci: make hot-unplug handler smoother
  s390x/pci: replace fid with idx in msg data of msix
  s390x/pci: fix stpcifc_service_call
  s390x/pci: refactor list_pci
  s390x/pci: refactor s390_pci_find_dev_by_idx
  s390x/pci: add checkings in CLP_SET_PCI_FN
  s390x/pci: enable zpci hot-plug/hot-unplug
  s390x/pci: enable uid-checking
  s390x/pci: introduce S390PCIBusDevice qdev
  s390x/pci: introduce S390PCIIOMMU
  s390x/pci: introduce S390PCIBus
  s390x/pci: enforce zPCI state checking
  s390x/pci: refactor s390_pci_find_dev_by_fh
  s390x/pci: unify FH_ macros
  s390x/pci: write fid in CLP_QUERY_PCI_FN
  s390x/pci: acceleration for getting S390pciState
  s390x/pci: fix failures of dma map/unmap
  s390x/css: Unplug handler of virtual css bridge
  s390x/css: Factor out virtual css bridge and bus
  s390x/css: use define for "virtual-css-bridge" literal
  ...

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

include/hw/s390x/css-bridge.h

@@ -0,0 +1,31 @@
+/*
+ * virtual css bridge definition
+ *
+ * Copyright 2012,2016 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *            Pierre Morel <pmorel@linux.vnet.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_S390X_CSS_BRIDGE_H
+#define HW_S390X_CSS_BRIDGE_H
+#include "qom/object.h"
+#include "hw/qdev-core.h"
+
+/* virtual css bridge */
+#define TYPE_VIRTUAL_CSS_BRIDGE "virtual-css-bridge"
+
+/* virtual css bus type */
+typedef struct VirtualCssBus {
+    BusState parent_obj;
+} VirtualCssBus;
+
+#define TYPE_VIRTUAL_CSS_BUS "virtual-css-bus"
+#define VIRTUAL_CSS_BUS(obj) \
+     OBJECT_CHECK(VirtualCssBus, (obj), TYPE_VIRTUAL_CSS_BUS)
+VirtualCssBus *virtual_css_bus_init(void);
+
+#endif

include/hw/s390x/css.h

@@ -17,6 +17,7 @@
 #include "hw/s390x/ioinst.h"
 
 /* Channel subsystem constants. */
+#define MAX_DEVNO 65535
 #define MAX_SCHID 65535
 #define MAX_SSID 3
 #define MAX_CSSID 254 /* 255 is reserved */
@@ -24,6 +25,8 @@
 
 #define MAX_CIWS 62
 
+#define VIRTUAL_CSSID 0xfe
+
 typedef struct CIW {
     uint8_t type;
     uint8_t command;
@@ -169,4 +172,19 @@ extern PropertyInfo css_devid_propinfo;
 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \
     DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId)
 
+/**
+ * Create a subchannel for the given bus id.
+ *
+ * If @p bus_id is valid, verify that it uses the virtual channel
+ * subsystem id and is not already in use, and find a free subchannel
+ * id for it. If @p bus_id is not valid, find a free subchannel id and
+ * device number across all subchannel sets. If either of the former
+ * actions succeed, allocate a subchannel structure, initialise it
+ * with the bus id, subchannel id and device number, register it with
+ * the CSS and return it. Otherwise return NULL.
+ *
+ * The caller becomes owner of the returned subchannel structure and
+ * is responsible for unregistering and freeing it.
+ */
+SubchDev *css_create_virtual_sch(CssDevId bus_id, Error **errp);
 #endif

include/hw/s390x/sclp.h

@@ -58,6 +58,7 @@
 #define SCLP_RC_CONTAINED_EQUIPMENT_CHECK       0x0340
 #define SCLP_RC_INSUFFICIENT_SCCB_LENGTH        0x0300
 #define SCLP_RC_STANDBY_READ_COMPLETION         0x0410
+#define SCLP_RC_ADAPTER_IN_RESERVED_STATE       0x05f0
 #define SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED       0x09f0
 #define SCLP_RC_INVALID_FUNCTION                0x40f0
 #define SCLP_RC_NO_EVENT_BUFFERS_STORED         0x60f0