On Thu, 22 Nov 2018 17:54:29 +0100 Cornelia Huck <cohuck@xxxxxxxxxx> wrote: > [This is the Linux kernel part, git tree is available at > https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw.git > vfio-ccw-caps > > The companion QEMU patches are available at > https://github.com/cohuck/qemu vfio-ccw-caps] > > Currently, vfio-ccw only relays START SUBCHANNEL requests to the real > device. This tends to work well for the most common 'good path' > scenarios; however, as we emulate {HALT,CLEAR} SUBCHANNEL in QEMU, > things like clearing pending requests at the device is currently not > supported. This may be a problem for e.g. error recovery. > > This patch series introduces capabilities (similar to what vfio-pci > uses) and exposes a new async region for handling hsch/csch. I'm on vacation and could not do more than skim over it real quick. FWIW it looks very promising. I intend to give it an in depth review once I'm back (i.e. second half of next week). Regards, Halil
