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authorTony Krowiak2018-10-10 19:03:07 +0200
committerCornelia Huck2018-10-12 11:32:18 +0200
commit2fe2942cd6ddad8ddd40fe5d16d67599c28959d7 (patch)
tree750c12504804b53cdc571fc847c4678fc68ee603 /MAINTAINERS
parents390x/ap: base Adjunct Processor (AP) object model (diff)
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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 'MAINTAINERS')
-rw-r--r--MAINTAINERS2
1 files changed, 2 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index b998424282..2730757b44 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -88,6 +88,7 @@ F: hw/char/terminal3270.c
F: hw/intc/s390_flic.c
F: hw/intc/s390_flic_kvm.c
F: hw/s390x/
+F: hw/vfio/ap.c
F: hw/vfio/ccw.c
F: hw/watchdog/wdt_diag288.c
F: include/hw/s390x/
@@ -1217,6 +1218,7 @@ F: hw/s390x/ap-device.c
F: hw/s390x/ap-bridge.c
F: include/hw/s390x/ap-device.h
F: include/hw/s390x/ap-bridge.h
+F: hw/vfio/ap.c
L: qemu-s390x@nongnu.org
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