On Wed, 12 Sep 2018 16:08:19 -0400 Tony Krowiak <akrow...@linux.vnet.ibm.com> wrote:
> Introduces a VFIO based AP device. The device is defined via > the QEMU command line by specifying: > > -device vfio-ap,sysfsdev=<path-to-mediated-matrix-device> > > There may be only one vfio-ap device configured for a guest. > > The mediated matrix device is created by the VFIO AP device > driver by writing a UUID to a sysfs attribute file (see > docs/vfio-ap.txt). The mediated matrix device will be named > after the UUID. Symbolic links to the $uuid are created in > many places, so the path to the mediated matrix device $uuid > can be specified in any of the following ways: > > /sys/devices/vfio_ap/matrix/$uuid > /sys/devices/vfio_ap/matrix/mdev_supported_types/vfio_ap-passthrough/devices/$uuid > /sys/bus/mdev/devices/$uuid > /sys/bus/mdev/drivers/vfio_mdev/$uuid > > When the vfio-ap device is realized, it acquires and opens the > VFIO iommu group to which the mediated matrix device is > bound. This causes a VFIO group notification event to be > signaled. The vfio_ap device driver's group notification > handler will get called at which time the device driver > will configure the the AP devices to which the guest will > be granted access. > > Signed-off-by: Tony Krowiak <akrow...@linux.ibm.com> > --- > MAINTAINERS | 1 + > default-configs/s390x-softmmu.mak | 1 + > hw/vfio/Makefile.objs | 1 + > hw/vfio/ap.c | 186 > +++++++++++++++++++++++++++++++++++++ > include/hw/vfio/vfio-common.h | 1 + > 5 files changed, 190 insertions(+), 0 deletions(-) > create mode 100644 hw/vfio/ap.c > diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c > new file mode 100644 > index 0000000..ae8d79c > --- /dev/null > +++ b/hw/vfio/ap.c > @@ -0,0 +1,186 @@ > +/* > + * VFIO based AP matrix device assignment > + * > + * Copyright 2018 IBM Corp. > + * Author(s): Tony Krowiak <akrow...@linux.vnet.ibm.com> Maybe use the short version of your mail address here as well? > + * Halil Pasic <pa...@linux.ibm.com> > + * > + * This work is licensed under the terms of the GNU GPL, version 2 or (at > + * your option) any later version. See the COPYING file in the top-level > + * directory. > + */
