Hi, Alex, Gentle ping... Please let us know whether this version looks good. Thanks Kevin > From: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> > Sent: Wednesday, April 8, 2020 1:58 PM > > Hi, > > This is a refresh on previous series: > https://patchwork.kernel.org/cover/11208279/ > and https://patchwork.freedesktop.org/series/70425/ > > 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]. > > As we agreed that for current opaque mdev device type, we'd still > explore management interface based on mdev sysfs definition. And this > one tries to follow Alex's previous suggestion to create generic > parameters under 'mdev' directory for each device, so vendor driver > could provide support like as other defined mdev sysfs entries. > > For mdev type with aggregation support, files as "aggregated_instances" > and "max_aggregation" should be created under 'mdev' directory. E.g > > /sys/devices/pci0000:00/0000:00:02.0/<UUID>/mdev/ > |-- aggregated_instances > |-- max_aggregation > > "aggregated_instances" is used to set or return current number of > instances for aggregation, which can not be larger than "max_aggregation". > > The first patch is to update the document for new mdev parameter directory. > The second one is to add aggregation support in GVT driver. > > References: > [1] https://software.intel.com/en-us/download/intel-virtualization- > technology-for-directed-io-architecture-specification > [2] https://software.intel.com/en-us/download/intel-scalable-io- > virtualization-technical-specification > [3] https://schd.ws/hosted_files/lc32018/00/LC3-SIOV-final.pdf > > Changelog: > v3: > - add more description for sysfs entries > - rebase GVT support > - rename accounting function > > Zhenyu Wang (2): > Documentation/driver-api/vfio-mediated-device.rst: update for > aggregation support > drm/i915/gvt: mdev aggregation type > > .../driver-api/vfio-mediated-device.rst | 22 +++ > drivers/gpu/drm/i915/gvt/aperture_gm.c | 44 +++-- > drivers/gpu/drm/i915/gvt/gtt.c | 9 +- > drivers/gpu/drm/i915/gvt/gvt.c | 7 +- > drivers/gpu/drm/i915/gvt/gvt.h | 42 +++-- > drivers/gpu/drm/i915/gvt/kvmgt.c | 115 +++++++++++- > drivers/gpu/drm/i915/gvt/vgpu.c | 172 ++++++++++++------ > 7 files changed, 317 insertions(+), 94 deletions(-) > > -- > 2.25.1
