linux-kernel - [PATCH 0/1] vfio-ccw: be less trusting

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Message-Id: <20180222153959.31272-1-cohuck@redhat.com>
Date:   Thu, 22 Feb 2018 16:39:58 +0100
From:   Cornelia Huck <cohuck@...hat.com>
To:     Dong Jia Shi <bjsdjshi@...ux.vnet.ibm.com>,
        Halil Pasic <pasic@...ux.vnet.ibm.com>
Cc:     linux-s390@...r.kernel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Cornelia Huck <cohuck@...hat.com>
Subject: [PATCH 0/1] vfio-ccw: be less trusting

I'm currently prototyping hsch()/csch() support for vfio-ccw, and
stumbled over this: We currently expect any I/O to be in command-mode,
but don't take care to actively reject transport-mode. This is not an
issue with QEMU (which rejects transport-mode ORBs before even the css
backend gets to it), but better play safe.

Should we want to support transport-mode in the future, we'll probably
need to introduce a capability for it that needs to be enabled by user
space.

[I also still have the doc patch from some time ago queued. Let's see
if we'll collect more patches.]

Cornelia Huck (1):
  vfio-ccw: fence off transport mode

 drivers/s390/cio/vfio_ccw_fsm.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.13.6