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vfio/ccw: vfio based subchannel passthrough driver

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We use the IOMMU_TYPE1 of VFIO to realize the subchannels
passthrough, implement a vfio based subchannels passthrough
driver called "vfio-ccw".

Support qemu parameters in the style of:
"-device vfio-ccw,sysfsdev=$mdev_file_path,devno=xx.x.xxxx'

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170517004813.58227-8-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Xiao Feng Ren 2017-05-17 02:48:07 +02:00 • committed by Cornelia Huck
parent a8eac9431a
commit 1dcac3e152
4 changed files with 190 additions and 0 deletions
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1
include/hw/vfio/vfio-common.h
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@ -45,6 +45,7 @@
enum {
VFIO_DEVICE_TYPE_PCI = 0,
VFIO_DEVICE_TYPE_PLATFORM = 1,
VFIO_DEVICE_TYPE_CCW = 2,
};
typedef struct VFIOMmap {