Re: [Qemu-devel] [RFC 15/15] s390-bios: Use sense ccw to ensure consistent device state at boot time

2018-07-06 Thread Halil Pasic
On 07/05/2018 07:25 PM, Jason J. Herne wrote: If a vfio-ccw device is left in an error state (example: pending unit check) then it is possible for that state to persist for a vfio-ccw device even after the enable subchannel that we do to bring the device online. If this state is allowed to per

Re: [Qemu-devel] [RFC 15/15] s390-bios: Use sense ccw to ensure consistent device state at boot time

2018-07-06 Thread Jason J. Herne
On 07/06/2018 06:08 AM, Cornelia Huck wrote: On Thu, 5 Jul 2018 13:25:43 -0400 "Jason J. Herne" wrote: If a vfio-ccw device is left in an error state (example: pending unit check) then it is possible for that state to persist for a vfio-ccw device even after the enable subchannel that we do t

Re: [Qemu-devel] [RFC 15/15] s390-bios: Use sense ccw to ensure consistent device state at boot time

2018-07-06 Thread Cornelia Huck
On Thu, 5 Jul 2018 13:25:43 -0400 "Jason J. Herne" wrote: > If a vfio-ccw device is left in an error state (example: pending unit > check) then it is possible for that state to persist for a vfio-ccw device > even > after the enable subchannel that we do to bring the device online. If this > s

[Qemu-devel] [RFC 15/15] s390-bios: Use sense ccw to ensure consistent device state at boot time

2018-07-05 Thread Jason J. Herne
If a vfio-ccw device is left in an error state (example: pending unit check) then it is possible for that state to persist for a vfio-ccw device even after the enable subchannel that we do to bring the device online. If this state is allowed to persist then even simple I/O operations will needlessl