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| author |   Farhan Ali <alifm@linux.ibm.com> | 2020-05-05 14:27:43 +0200 |
|---|---|---|
| committer |   Cornelia Huck <cohuck@redhat.com> | 2020-06-03 11:27:43 +0200 |
| commit | d8cac29b1d52204e6632d2887eff766acd02b9aa (patch) | |
| tree | cef969d5a9b5e23684a582d11218b23ac5512896 /drivers/s390/cio/vfio_ccw_ops.c | |
| parent | vfio-ccw: Refactor IRQ handlers (diff) | |
| download | linux-dev-d8cac29b1d52204e6632d2887eff766acd02b9aa.tar.xz linux-dev-d8cac29b1d52204e6632d2887eff766acd02b9aa.zip | |
vfio-ccw: Introduce a new CRW region
This region provides a mechanism to pass a Channel Report Word
that affect vfio-ccw devices, and needs to be passed to the guest
for its awareness and/or processing.
The base driver (see crw_collect_info()) provides space for two
CRWs, as a subchannel event may have two CRWs chained together
(one for the ssid, one for the subchannel). As vfio-ccw will
deal with everything at the subchannel level, provide space
for a single CRW to be transferred in one shot.
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505122745.53208-7-farman@linux.ibm.com>
[CH: added padding to ccw_crw_region]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers/s390/cio/vfio_ccw_ops.c')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_ops.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index c3a74ab7bb86..8b3ed5b45277 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -178,6 +178,10 @@ static int vfio_ccw_mdev_open(struct mdev_device *mdev) if (ret) goto out_unregister; + ret = vfio_ccw_register_crw_dev_regions(private); + if (ret) + goto out_unregister; + return ret; out_unregister: @@ -389,6 +393,7 @@ static int vfio_ccw_mdev_get_irq_info(struct vfio_irq_info *info) { switch (info->index) { case VFIO_CCW_IO_IRQ_INDEX: + case VFIO_CCW_CRW_IRQ_INDEX: info->count = 1; info->flags = VFIO_IRQ_INFO_EVENTFD; break; @@ -416,6 +421,9 @@ static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev, case VFIO_CCW_IO_IRQ_INDEX: ctx = &private->io_trigger; break; + case VFIO_CCW_CRW_IRQ_INDEX: + ctx = &private->crw_trigger; + break; default: return -EINVAL; } |