qemu/default-configs/s390x-softmmu.mak
Tony Krowiak 2fe2942cd6 s390x/vfio: ap: Introduce VFIO AP device
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 <akrowiak@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-6-akrowiak@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[CH: added missing g_free and device category]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-12 11:32:18 +02:00

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Makefile

CONFIG_PCI=y
CONFIG_VIRTIO_PCI=$(CONFIG_PCI)
include virtio.mak
CONFIG_SCLPCONSOLE=y
CONFIG_TERMINAL3270=y
CONFIG_S390_FLIC=y
CONFIG_S390_FLIC_KVM=$(CONFIG_KVM)
CONFIG_VFIO_CCW=$(CONFIG_LINUX)
CONFIG_WDT_DIAG288=y
CONFIG_VFIO_AP=$(CONFIG_LINUX)