Re: [qemu-s390x] [PATCH 0/3] vfio-ccw: support hsch/csch (kernel part)

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On Sat, 24 Nov 2018 22:07:57 +0100
Halil Pasic <pasic@xxxxxxxxxxxxx> wrote:

> 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).

Thanks!

Please do not feel pressured, it did take me long enough to get this
out :)



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