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vfio: ccw: basic implementation for vfio_ccw driver

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To make vfio support subchannel devices, we need a css driver for
the vfio subchannels. This patch adds a basic vfio-ccw subchannel
driver for this purpose.

To enable VFIO for vfio-ccw, enable S390_CCW_IOMMU config option
and configure VFIO as required.

Acked-by: Pierre Morel <[email protected]>
Signed-off-by: Dong Jia Shi <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>
This commit is contained in:
Dong Jia Shi 2017-03-17 04:17:31 +01:00 • committed by Cornelia Huck
commit 63f1934d56
6 changed files with 309 additions and 0 deletions
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8
drivers/iommu/Kconfig
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@ -327,6 +327,14 @@ config S390_IOMMU
help
Support for the IOMMU API for s390 PCI devices.
config S390_CCW_IOMMU
bool "S390 CCW IOMMU Support"
depends on S390 && CCW
select IOMMU_API
help
Enables bits of IOMMU API required by VFIO. The iommu_ops
is not implemented as it is not necessary for VFIO.
config MTK_IOMMU
bool "MTK IOMMU Support"
depends on ARM || ARM64