On Mon, 26 Nov 2018 16:48:50 +0800 Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> wrote: > Hi, > > This is respin of previous sending from https://www.spinics.net/lists/kvm/msg176447.html > > 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. This requirement comes not only from to be able to > allocate flexible resources for KVMGT, but also from Intel scalable IO > virtualization which would use vfio/mdev to be able to allocate arbitrary > resources on mdev instance. More info on [1] [2] [3]. > > To allow to create user defined resources for mdev, it trys to extend mdev > create interface by adding new "aggregate=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>,aggregate=10" > create > > VM manager e.g libvirt can check mdev type with "aggregation" attribute which > can support this setting. If no "aggregation" attribute found for mdev type, > previous behavior is still kept for one instance allocation. And new sysfs > attribute "aggregated_instances" is created for each mdev device to show allocated number. I have only looked at the infrastructure, not at the gvt patch; generally, it looks good to me.
