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| author | Halil Pasic <pasic@linux.vnet.ibm.com> | 2017-02-14 14:06:07 +0100 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2017-02-24 10:15:18 +0100 |
| commit | 47e13dfd86e33397d55bc3c3d08ac0ec3088b138 (patch) | |
| tree | 6459fcc80a3190a35aa88cbe9589b26587d78632 /hw | |
| parent | ba690c7171cb863643c21ab9f7e7116ad5df1c63 (diff) | |
| download | qemu-47e13dfd86e33397d55bc3c3d08ac0ec3088b138.zip qemu-47e13dfd86e33397d55bc3c3d08ac0ec3088b138.tar.gz qemu-47e13dfd86e33397d55bc3c3d08ac0ec3088b138.tar.bz2 | |
virtio-ccw: handle virtio 1 only devices
As a preparation for wiring-up virtio-crypto, the first non-transitional
virtio device on the ccw transport, let us introduce a mechanism for
disabling revision 0. This is more or less equivalent with disabling
legacy as revision 0 is legacy only, and legacy drivers use the revision
0 exclusively.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 18 | ||||
| -rw-r--r-- | hw/s390x/virtio-ccw.h | 1 |
2 files changed, 18 insertions, 1 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 63c4637..32c414f 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -280,6 +280,15 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ccw.cmd_code); check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); + if (dev->force_revision_1 && dev->revision < 0 && + ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) { + /* + * virtio-1 drivers must start with negotiating to a revision >= 1, + * so post a command reject for all other commands + */ + return -ENOSYS; + } + /* Look at the command. */ switch (ccw.cmd_code) { case CCW_CMD_SET_VQ: @@ -638,7 +647,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) * need to fetch it here. Nothing to do for now, though. */ if (dev->revision >= 0 || - revinfo.revision > virtio_ccw_rev_max(dev)) { + revinfo.revision > virtio_ccw_rev_max(dev) || + (dev->force_revision_1 && !revinfo.revision)) { ret = -ENOSYS; break; } @@ -669,6 +679,12 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) if (!sch) { return; } + if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { + error_setg(&err, "Invalid value of property max_rev " + "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); + error_propagate(errp, err); + return; + } sch->driver_data = dev; sch->ccw_cb = virtio_ccw_cb; diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h index 77d10f1..6a04e94 100644 --- a/hw/s390x/virtio-ccw.h +++ b/hw/s390x/virtio-ccw.h @@ -94,6 +94,7 @@ struct VirtioCcwDevice { IndAddr *indicators2; IndAddr *summary_indicator; uint64_t ind_bit; + bool force_revision_1; }; /* The maximum virtio revision we support. */ |