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| author | Tony Krowiak <akrowiak@linux.ibm.com> | 2018-10-10 13:03:07 -0400 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2018-10-12 11:32:18 +0200 |
| commit | 2fe2942cd6ddad8ddd40fe5d16d67599c28959d7 (patch) | |
| tree | 750c12504804b53cdc571fc847c4678fc68ee603 /default-configs/s390x-softmmu.mak | |
| parent | a51b31535a8ec13997de29b357f7cc1dcd8a7f9c (diff) | |
| download | qemu-2fe2942cd6ddad8ddd40fe5d16d67599c28959d7.zip | |
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/$uuid
When the vfio-ap device is realized, it acquires and opens the
VFIO iommu group to which the mediated matrix device is
bound. This causes a VFIO group notification event to be
signaled. The vfio_ap device driver's group notification
handler will get called at which time the device driver
will configure the the AP devices to which the guest will
be granted access.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-6-akrowiak@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[CH: added missing g_free and device category]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'default-configs/s390x-softmmu.mak')
| -rw-r--r-- | default-configs/s390x-softmmu.mak | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/default-configs/s390x-softmmu.mak b/default-configs/s390x-softmmu.mak index d6b67d50f0..5eef375924 100644 --- a/default-configs/s390x-softmmu.mak +++ b/default-configs/s390x-softmmu.mak @@ -7,3 +7,4 @@ CONFIG_S390_FLIC=y CONFIG_S390_FLIC_KVM=$(CONFIG_KVM) CONFIG_VFIO_CCW=$(CONFIG_LINUX) CONFIG_WDT_DIAG288=y +CONFIG_VFIO_AP=$(CONFIG_LINUX) |