Re: [RFC PATCH 3/7] vfio: add spimdev support
From: Randy Dunlap <hidden>
Date: 2018-08-01 16:24:18
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kvm, linux-doc, linux-iommu, lkml
On 08/01/2018 03:22 AM, Kenneth Lee wrote:
quoted hunk ↗ jump to hunk
From: Kenneth Lee <redacted> 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 <redacted> Signed-off-by: Zaibo Xu <redacted> 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.hdiff --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