Merge remote-tracking branch 'remotes/cohuck-gitlab/tags/s390x-20210121' into staging

s390x updates:
- headers update to Linux 5.11-rc2
- fix tcg emulation for some instructions that are generated by
  clang Linux kernel builds
- vfio-ccw: wire up the device unplug notification mechanism
- fix a gcc 11 warning

# gpg: Signature made Thu 21 Jan 2021 12:08:12 GMT
# gpg:                using RSA key C3D0D66DC3624FF6A8C018CEDECF6B93C6F02FAF
# gpg:                issuer "cohuck@redhat.com"
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>" [unknown]
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>" [unknown]
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>" [unknown]
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck-gitlab/tags/s390x-20210121:
  s390x: Use strpadcpy for copying vm name
  vfio-ccw: Connect the device request notifier
  Update linux headers to 5.11-rc2
  update-linux-headers: Include const.h
  s390x/tcg: Ignore register content if b1/b2 is zero when handling EXECUTE
  tests/tcg/s390x: Fix EXRL tests
  s390x/tcg: Don't ignore content in r0 when not specified via "b" or "x"
  s390x/tcg: Fix RISBHG
  s390x/tcg: Fix ALGSI

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

1 files changed, 36 insertions, 4 deletions

diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index d2755d7fc5..bc78a0ad76 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -49,6 +49,7 @@ struct VFIOCCWDevice {
     struct ccw_crw_region *crw_region;
     EventNotifier io_notifier;
     EventNotifier crw_notifier;
+    EventNotifier req_notifier;
     bool force_orb_pfch;
     bool warned_orb_pfch;
 };
@@ -287,6 +288,21 @@ static void vfio_ccw_crw_read(VFIOCCWDevice *vcdev)
     } while (1);
 }
 
+static void vfio_ccw_req_notifier_handler(void *opaque)
+{
+    VFIOCCWDevice *vcdev = opaque;
+    Error *err = NULL;
+
+    if (!event_notifier_test_and_clear(&vcdev->req_notifier)) {
+        return;
+    }
+
+    qdev_unplug(DEVICE(vcdev), &err);
+    if (err) {
+        warn_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
+    }
+}
+
 static void vfio_ccw_crw_notifier_handler(void *opaque)
 {
     VFIOCCWDevice *vcdev = opaque;
@@ -386,6 +402,10 @@ static void vfio_ccw_register_irq_notifier(VFIOCCWDevice *vcdev,
         notifier = &vcdev->crw_notifier;
         fd_read = vfio_ccw_crw_notifier_handler;
         break;
+    case VFIO_CCW_REQ_IRQ_INDEX:
+        notifier = &vcdev->req_notifier;
+        fd_read = vfio_ccw_req_notifier_handler;
+        break;
     default:
         error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
         return;
@@ -440,6 +460,9 @@ static void vfio_ccw_unregister_irq_notifier(VFIOCCWDevice *vcdev,
     case VFIO_CCW_CRW_IRQ_INDEX:
         notifier = &vcdev->crw_notifier;
         break;
+    case VFIO_CCW_REQ_IRQ_INDEX:
+        notifier = &vcdev->req_notifier;
+        break;
     default:
         error_report("vfio: Unsupported device irq(%d)", irq);
         return;
@@ -661,20 +684,28 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp)
 
     vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX, &err);
     if (err) {
-        goto out_notifier_err;
+        goto out_io_notifier_err;
     }
 
     if (vcdev->crw_region) {
         vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX, &err);
         if (err) {
-            vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
-            goto out_notifier_err;
+            goto out_crw_notifier_err;
         }
     }
 
+    vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX, &err);
+    if (err) {
+        goto out_req_notifier_err;
+    }
+
     return;
 
-out_notifier_err:
+out_req_notifier_err:
+    vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
+out_crw_notifier_err:
+    vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
+out_io_notifier_err:
     vfio_ccw_put_region(vcdev);
 out_region_err:
     vfio_ccw_put_device(vcdev);
@@ -696,6 +727,7 @@ static void vfio_ccw_unrealize(DeviceState *dev)
     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
     VFIOGroup *group = vcdev->vdev.group;
 
+    vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX);
     vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
     vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
     vfio_ccw_put_region(vcdev);