Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20180619' into staging

- cleanup in virtio-ccw
- accommodate guests using vfio-ccw without specifying unlimited
  prefetch, but actually working fine
- add cpu model for the z14 Model ZR1
- add support for pxelinux.cfg-style network booting to the s390x
  firmware

# gpg: Signature made Tue 19 Jun 2018 10:33:06 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20180619:
  pc-bios/s390-ccw: Update the s390-netboot.img binary
  pc-bios/s390-ccw: Optimize the s390-netboot.img for size
  pc-bios/s390-ccw/net: Try to load pxelinux.cfg file accoring to the UUID
  pc-bios/s390-ccw/net: Add support for pxelinux-style config files
  pc-bios/s390-ccw/net: Update code for the latest changes in SLOF
  roms: Update SLOF submodule to current status
  pc-bios/s390-ccw: define loadparm length
  s390x/cpumodels: add z14 Model ZR1
  s390x/ipl: Try to detect Linux vs non Linux for initial IPL PSW
  vfio-ccw: remove orb.c64 (64 bit data addresses) check
  vfio-ccw: add force unlimited prefetch property
  virtio-ccw: clean up notify

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

1 files changed, 35 insertions, 0 deletions

diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 76e4e8c652..351b305e1a 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -33,8 +33,30 @@ typedef struct VFIOCCWDevice {
     uint64_t io_region_offset;
     struct ccw_io_region *io_region;
     EventNotifier io_notifier;
+    bool force_orb_pfch;
+    bool warned_orb_pfch;
 } VFIOCCWDevice;
 
+static inline void warn_once(bool *warned, const char *fmt, ...)
+{
+    va_list ap;
+
+    if (!warned || *warned) {
+        return;
+    }
+    *warned = true;
+    va_start(ap, fmt);
+    warn_vreport(fmt, ap);
+    va_end(ap);
+}
+
+static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
+                                  const char *msg)
+{
+    warn_once(&vcdev->warned_orb_pfch, "vfio-ccw (devno %x.%x.%04x): %s",
+              sch->cssid, sch->ssid, sch->devno, msg);
+}
+
 static void vfio_ccw_compute_needs_reset(VFIODevice *vdev)
 {
     vdev->needs_reset = false;
@@ -55,6 +77,18 @@ static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
     struct ccw_io_region *region = vcdev->io_region;
     int ret;
 
+    if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH)) {
+        if (!(vcdev->force_orb_pfch)) {
+            warn_once_pfch(vcdev, sch, "requires PFCH flag set");
+            sch_gen_unit_exception(sch);
+            css_inject_io_interrupt(sch);
+            return IOINST_CC_EXPECTED;
+        } else {
+            sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
+            warn_once_pfch(vcdev, sch, "PFCH flag forced");
+        }
+    }
+
     QEMU_BUILD_BUG_ON(sizeof(region->orb_area) != sizeof(ORB));
     QEMU_BUILD_BUG_ON(sizeof(region->scsw_area) != sizeof(SCSW));
     QEMU_BUILD_BUG_ON(sizeof(region->irb_area) != sizeof(IRB));
@@ -430,6 +464,7 @@ static void vfio_ccw_unrealize(DeviceState *dev, Error **errp)
 
 static Property vfio_ccw_properties[] = {
     DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
+    DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
     DEFINE_PROP_END_OF_LIST(),
 };