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SubjectRe: [RFC PATCH 3/7] vfio: add spimdev support
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On 08/01/2018 03:22 AM, Kenneth Lee wrote:
> From: Kenneth Lee <liguozhu@hisilicon.com>
>
> 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@hisilicon.com>
> Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
> ---
> 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

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