On 08/01/2018 03:22 AM, Kenneth Lee wrote: > From: Kenneth Lee <liguozhu@xxxxxxxxxxxxx> > > SPIMDEV is "Share Parent IOMMU Mdev". It is a vfio-mdev. But differ from > the general vfio-mdev: > > 1. It shares its parent's IOMMU. > 2. There is no hardware resource attached to the mdev is created. The > hardware resource (A `queue') is allocated only when the mdev is > opened. > > Currently only the vfio type-1 driver is updated to make it to be aware > of. > > Signed-off-by: Kenneth Lee <liguozhu@xxxxxxxxxxxxx> > Signed-off-by: Zaibo Xu <xuzaibo@xxxxxxxxxx> > Signed-off-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> > --- > drivers/vfio/Kconfig | 1 + > drivers/vfio/Makefile | 1 + > drivers/vfio/spimdev/Kconfig | 10 + > drivers/vfio/spimdev/Makefile | 3 + > drivers/vfio/spimdev/vfio_spimdev.c | 421 ++++++++++++++++++++++++++++ > drivers/vfio/vfio_iommu_type1.c | 136 ++++++++- > include/linux/vfio_spimdev.h | 95 +++++++ > include/uapi/linux/vfio_spimdev.h | 28 ++ > 8 files changed, 689 insertions(+), 6 deletions(-) > create mode 100644 drivers/vfio/spimdev/Kconfig > create mode 100644 drivers/vfio/spimdev/Makefile > create mode 100644 drivers/vfio/spimdev/vfio_spimdev.c > create mode 100644 include/linux/vfio_spimdev.h > create mode 100644 include/uapi/linux/vfio_spimdev.h > > diff --git a/drivers/vfio/spimdev/Kconfig b/drivers/vfio/spimdev/Kconfig > new file mode 100644 > index 000000000000..1226301f9d0e > --- /dev/null > +++ b/drivers/vfio/spimdev/Kconfig > @@ -0,0 +1,10 @@ > +# SPDX-License-Identifier: GPL-2.0 > +config VFIO_SPIMDEV > + tristate "Support for Share Parent IOMMU MDEV" > + depends on VFIO_MDEV_DEVICE > + help > + Support for VFIO Share Parent IOMMU MDEV, which enable the kernel to enables > + support for the light weight hardware accelerator framework, WrapDrive. support the lightweight hardware accelerator framework, WrapDrive. > + > + To compile this as a module, choose M here: the module will be called > + spimdev. -- ~Randy
