Merge remote-tracking branch 'cohuck/tags/s390x-20170523' into staging

s390x updates:
- support for vfio-ccw to passthrough channel devices
- allow ccw bios to boot from scsi generic devices
- bugfix for initial reset

# gpg: Signature made Tue 23 May 2017 12:02:24 PM BST
# gpg:                using RSA key 0xDECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* cohuck/tags/s390x-20170523: (21 commits)
  s390/kvm: do not reset riccb on initial cpu reset
  MAINTAINERS: Add vfio-ccw maintainer
  vfio/ccw: update sense data if a unit check is pending
  s390x/css: ccw translation infrastructure
  s390x/css: introduce and realize ccw-request callback
  vfio/ccw: get irqs info and set the eventfd fd
  vfio/ccw: get io region info
  vfio/ccw: vfio based subchannel passthrough driver
  s390x/css: device support for s390-ccw passthrough
  s390x/css: realize css_create_sch
  s390x/css: realize css_sch_build_schib
  s390x/css: add s390-squash-mcss machine option
  linux-headers: update
  pc-bios/s390-ccw.img: rebuild image
  pc-bios/s390-ccw: Build a reasonable max_sectors limit
  pc-bios/s390-ccw: Get Block Limits VPD device data
  pc-bios/s390-ccw: Get list of supported VPD pages
  pc-bios/s390-ccw: Refactor scsi_inquiry function
  pc-bios/s390-ccw: Break up virtio-scsi read into multiples
  pc-bios/s390-ccw: Move SCSI block factor to outer read
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

5 files changed, 84 insertions, 25 deletions

diff --git a/include/hw/s390x/css-bridge.h b/include/hw/s390x/css-bridge.h
index 5a0203be5f..cf0860432a 100644
--- a/include/hw/s390x/css-bridge.h
+++ b/include/hw/s390x/css-bridge.h
@@ -28,6 +28,7 @@ typedef struct VirtualCssBridge {
 /* virtual css bus type */
 typedef struct VirtualCssBus {
     BusState parent_obj;
+    bool squash_mcss;
 } VirtualCssBus;
 
 #define TYPE_VIRTUAL_CSS_BUS "virtual-css-bus"
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index e61fa74d9b..596a2f2ef3 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -91,10 +91,29 @@ struct SubchDev {
     /* transport-provided data: */
     int (*ccw_cb) (SubchDev *, CCW1);
     void (*disable_cb)(SubchDev *);
+    int (*do_subchannel_work) (SubchDev *, ORB *);
     SenseId id;
     void *driver_data;
 };
 
+/*
+ * Identify a device within the channel subsystem.
+ * Note that this can be used to identify either the subchannel or
+ * the attached I/O device, as there's always one I/O device per
+ * subchannel.
+ */
+typedef struct CssDevId {
+    uint8_t cssid;
+    uint8_t ssid;
+    uint16_t devid;
+    bool valid;
+} CssDevId;
+
+extern PropertyInfo css_devid_propinfo;
+
+#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \
+    DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId)
+
 typedef struct IndAddr {
     hwaddr addr;
     uint64_t map;
@@ -116,8 +135,11 @@ bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
                       uint16_t devno, SubchDev *sch);
 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
+int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id);
 unsigned int css_find_free_chpid(uint8_t cssid);
 uint16_t css_build_subchannel_id(SubchDev *sch);
+void copy_scsw_to_guest(SCSW *dest, const SCSW *src);
+void css_inject_io_interrupt(SubchDev *sch);
 void css_reset(void);
 void css_reset_sch(SubchDev *sch);
 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
@@ -127,6 +149,9 @@ void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
 void css_generate_css_crws(uint8_t cssid);
 void css_clear_sei_pending(void);
 void css_adapter_interrupt(uint8_t isc);
+int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data);
+int do_subchannel_work_virtual(SubchDev *sub, ORB *orb);
+int do_subchannel_work_passthrough(SubchDev *sub, ORB *orb);
 
 typedef enum {
     CSS_IO_ADAPTER_VIRTIO = 0,
@@ -164,23 +189,6 @@ int css_do_rsch(SubchDev *sch);
 int css_do_rchp(uint8_t cssid, uint8_t chpid);
 bool css_present(uint8_t cssid);
 #endif
-/*
- * Identify a device within the channel subsystem.
- * Note that this can be used to identify either the subchannel or
- * the attached I/O device, as there's always one I/O device per
- * subchannel.
- */
-typedef struct CssDevId {
-    uint8_t cssid;
-    uint8_t ssid;
-    uint16_t devid;
-    bool valid;
-} CssDevId;
-
-extern PropertyInfo css_devid_propinfo;
-
-#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \
-    DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId)
 
 extern PropertyInfo css_devid_ro_propinfo;
 
@@ -190,16 +198,25 @@ extern PropertyInfo css_devid_ro_propinfo;
 /**
  * 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.
+ * If @p bus_id is valid, and @p squash_mcss is true, verify that it is
+ * not already in use in the default css, and find a free devno from the
+ * default css image for it.
+ * If @p bus_id is valid, and @p squash_mcss is false, verify that it is
+ * not already in use, and find a free devno for it.
+ * If @p bus_id is not valid, and if either @p squash_mcss or @p is_virtual
+ * is true, find a free subchannel id and device number across all
+ * subchannel sets from the default css image.
+ * If @p bus_id is not valid, and if both @p squash_mcss and @p is_virtual
+ * are false, find a non-full css image and find a free subchannel id and
+ * device number across all subchannel sets from it.
+ *
+ * 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);
+SubchDev *css_create_sch(CssDevId bus_id, bool is_virtual, bool squash_mcss,
+                         Error **errp);
 #endif
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
new file mode 100644
index 0000000000..9f45cf1347
--- /dev/null
+++ b/include/hw/s390x/s390-ccw.h
@@ -0,0 +1,39 @@
+/*
+ * s390 CCW Assignment Support
+ *
+ * Copyright 2017 IBM Corp.
+ * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
+ *            Xiao Feng Ren <renxiaof@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_S390_CCW_H
+#define HW_S390_CCW_H
+
+#include "hw/s390x/ccw-device.h"
+
+#define TYPE_S390_CCW "s390-ccw"
+#define S390_CCW_DEVICE(obj) \
+    OBJECT_CHECK(S390CCWDevice, (obj), TYPE_S390_CCW)
+#define S390_CCW_DEVICE_CLASS(klass) \
+    OBJECT_CLASS_CHECK(S390CCWDeviceClass, (klass), TYPE_S390_CCW)
+#define S390_CCW_DEVICE_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(S390CCWDeviceClass, (obj), TYPE_S390_CCW)
+
+typedef struct S390CCWDevice {
+    CcwDevice parent_obj;
+    CssDevId hostid;
+    char *mdevid;
+} S390CCWDevice;
+
+typedef struct S390CCWDeviceClass {
+    CCWDeviceClass parent_class;
+    void (*realize)(S390CCWDevice *dev, char *sysfsdev, Error **errp);
+    void (*unrealize)(S390CCWDevice *dev, Error **errp);
+    int (*handle_request) (ORB *, SCSW *, void *);
+} S390CCWDeviceClass;
+
+#endif
diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h
index 7b8a3e4d74..3027555f6d 100644
--- a/include/hw/s390x/s390-virtio-ccw.h
+++ b/include/hw/s390x/s390-virtio-ccw.h
@@ -29,6 +29,7 @@ typedef struct S390CcwMachineState {
     bool aes_key_wrap;
     bool dea_key_wrap;
     uint8_t loadparm[8];
+    bool s390_squash_mcss;
 } S390CcwMachineState;
 
 typedef struct S390CcwMachineClass {
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index c582de18c9..9521013d52 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -45,6 +45,7 @@
 enum {
     VFIO_DEVICE_TYPE_PCI = 0,
     VFIO_DEVICE_TYPE_PLATFORM = 1,
+    VFIO_DEVICE_TYPE_CCW = 2,
 };
 
 typedef struct VFIOMmap {