On Tue, 5 May 2020 14:27:44 +0200 Eric Farman <farman@xxxxxxxxxxxxx> wrote: > From: Farhan Ali <alifm@xxxxxxxxxxxxx> > > Use the IRQ to notify userspace that there is a CRW > pending in the region, related to path-availability > changes on the passthrough subchannel. > > Signed-off-by: Farhan Ali <alifm@xxxxxxxxxxxxx> > Signed-off-by: Eric Farman <farman@xxxxxxxxxxxxx> > --- > > Notes: > v3->v4: > - s/vfio_ccw_alloc_crw()/vfio_ccw_queue_crw()/ [CH] > - Remove cssid from crw that is built [CH] > > v2->v3: > - Refactor vfio_ccw_alloc_crw() to accept rsc, erc, and rsid fields > of a CRW as input [CH] > - Copy the right amount of CRWs to the crw_region [EF] > - Use sizeof(target) for the memcpy, rather than sizeof(source) [EF] > - Ensure the CRW region is empty if no CRW is present [EF/CH] > - Refactor how data goes from private-to-region-to-user [CH] > - Reduce the number of CRWs from two to one [CH] > - s/vc_crw/crw/ [EF] > > v1->v2: > - Remove extraneous 0x0 in crw.rsid assignment [CH] > - Refactor the building/queueing of a crw into its own routine [EF] > > v0->v1: [EF] > - Place the non-refactoring changes from the previous patch here > - Clean up checkpatch (whitespace) errors > - s/chp_crw/crw/ > - Move acquire/release of io_mutex in vfio_ccw_crw_region_read() > into patch that introduces that region > - Remove duplicate include from vfio_ccw_drv.c > - Reorder include in vfio_ccw_private.h > > drivers/s390/cio/vfio_ccw_chp.c | 17 ++++++++++ > drivers/s390/cio/vfio_ccw_drv.c | 49 +++++++++++++++++++++++++++++ > drivers/s390/cio/vfio_ccw_private.h | 8 +++++ > 3 files changed, 74 insertions(+) Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
