The attached are a few fixes to the vfio-ccw kernel code for potential errors or architecture anomalies. Under normal usage, and even most abnormal usage, they don't expose any problems to a well-behaved guest and its devices. But, they are deficiencies just the same and could cause some weird behavior if they ever popped up in real life. I have tried to arrange these patches in a "solves a noticeable problem with existing workloads" to "solves a theoretical problem with hypothetical workloads" order. This way, the bigger ones at the end can be discussed without impeding the smaller and more impactful ones at the start. They are based on today's master, not Conny's vfio-ccw tree even though there are some good fixes pending there. I've run this series both with and without that code, but couldn't decide which base would provide an easier time applying patches. "I think" they should apply fine to both, but I apologize in advance if I guessed wrong! :) Eric Farman (7): s390/cio: Update SCSW if it points to the end of the chain s390/cio: Set vfio-ccw FSM state before ioeventfd s390/cio: Split pfn_array_alloc_pin into pieces s390/cio: Initialize the host addresses in pfn_array s390/cio: Allow zero-length CCWs in vfio-ccw s390/cio: Don't pin vfio pages for empty transfers s390/cio: Remove vfio-ccw checks of command codes drivers/s390/cio/vfio_ccw_cp.c | 163 ++++++++++++++++++++++++++++------------ drivers/s390/cio/vfio_ccw_drv.c | 6 +- 2 files changed, 116 insertions(+), 53 deletions(-) -- 2.16.4
