[libvirt] [RFC PATCH 0/2] Add new mdev type for aggregated resources

Current mdev device create interface depends on fixed mdev type, which get uuid from user to create instance of mdev device. If user wants to use customized number of resource for mdev device, then only can create new mdev type for that which may not be flexible. To allow to create user defined resources for mdev, this RFC trys to extend mdev create interface by adding new "instances=xxx" parameter following uuid, for target mdev type if aggregation is supported, it can create new mdev device which contains resources combined by number of instances, e.g echo "<uuid>,instances=10" > create VM manager e.g libvirt can check mdev type with "aggregation" attribute which can support this setting. And new sysfs attribute "instances" is created for each mdev device to show allocated number. Default number of 1 or no "instances" file can be used for compatibility check. This RFC trys to create new KVMGT type with minimal vGPU resources which can be combined with "instances=x" setting to allocate for user wanted resources. Zhenyu Wang (2): vfio/mdev: Add new instances parameters for mdev create drm/i915/gvt: Add new aggregation type drivers/gpu/drm/i915/gvt/gvt.c | 26 ++++++++++++--- drivers/gpu/drm/i915/gvt/gvt.h | 14 +++++--- drivers/gpu/drm/i915/gvt/kvmgt.c | 9 +++-- drivers/gpu/drm/i915/gvt/vgpu.c | 56 ++++++++++++++++++++++++++++---- drivers/s390/cio/vfio_ccw_ops.c | 3 +- drivers/vfio/mdev/mdev_core.c | 11 ++++--- drivers/vfio/mdev/mdev_private.h | 6 +++- drivers/vfio/mdev/mdev_sysfs.c | 42 ++++++++++++++++++++---- include/linux/mdev.h | 3 +- samples/vfio-mdev/mbochs.c | 3 +- samples/vfio-mdev/mdpy.c | 3 +- samples/vfio-mdev/mtty.c | 3 +- 12 files changed, 141 insertions(+), 38 deletions(-) -- 2.18.0.rc2