On Wed, Aug 01, 2018 at 09:23:52AM -0700, Randy Dunlap wrote:
> Date: Wed, 1 Aug 2018 09:23:52 -0700
> From: Randy Dunlap <[email protected]>
> To: Kenneth Lee <[email protected]>, Jonathan Corbet <[email protected]>,
> Herbert Xu <[email protected]>, "David S . Miller"
> <[email protected]>, Joerg Roedel <[email protected]>, Alex Williamson
> <[email protected]>, Kenneth Lee <[email protected]>, Hao
> Fang <[email protected]>, Zhou Wang <[email protected]>, Zaibo Xu
> <[email protected]>, Philippe Ombredanne <[email protected]>, Greg
> Kroah-Hartman <[email protected]>, Thomas Gleixner
> <[email protected]>, [email protected],
> [email protected], [email protected],
> [email protected], [email protected],
> [email protected], Lu Baolu <[email protected]>,
> Sanjay Kumar <[email protected]>
> CC: [email protected]
> Subject: Re: [RFC PATCH 3/7] vfio: add spimdev support
> User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
> Thunderbird/52.9.1
> Message-ID: <[email protected]>
>
> On 08/01/2018 03:22 AM, Kenneth Lee wrote:
> > From: Kenneth Lee <[email protected]>
> >
> > 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 <[email protected]>
> > Signed-off-by: Zaibo Xu <[email protected]>
> > Signed-off-by: Zhou Wang <[email protected]>
> > ---
> > 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
Thanks, I will update it in next version.
--
-Kenneth(Hisilicon)
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