diff options
| author | Jared Rossi | 2020-05-12 20:15:35 +0200 |
|---|---|---|
| committer | Cornelia Huck | 2020-06-05 17:13:11 +0200 |
| commit | 24e58a7b1d411627e326144030a20dcf0093fed0 (patch) | |
| tree | 18a17706f83842d117ed33b948d281d229bf282a /hw/vfio/ccw.c | |
| parent | docs/s390x: document 3270 (diff) | |
| download | qemu-24e58a7b1d411627e326144030a20dcf0093fed0.tar.gz qemu-24e58a7b1d411627e326144030a20dcf0093fed0.tar.xz qemu-24e58a7b1d411627e326144030a20dcf0093fed0.zip | |
vfio-ccw: allow non-prefetch ORBs
Remove the explicit prefetch check when using vfio-ccw devices.
This check does not trigger in practice as all Linux channel programs
are intended to use prefetch.
Newer Linux kernel versions do not require to force the PFCH flag with
vfio-ccw devices anymore.
Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20200512181535.18630-2-jrossi@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'hw/vfio/ccw.c')
| -rw-r--r-- | hw/vfio/ccw.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index c8624943c1..63406184d2 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -74,16 +74,9 @@ 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"); - } + if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH) && vcdev->force_orb_pfch) { + 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)); |