On 2016/11/21 18:01, Lorenzo Pieralisi wrote:

DT based systems have a generic kernel API to configure IOMMUs
for devices (ie of_iommu_configure()).

On ARM based ACPI systems, the of_iommu_configure() equivalent can
be implemented atop ACPI IORT kernel API, with the corresponding
functions to map device identifiers to IOMMUs and retrieve the
corresponding IOMMU operations necessary for DMA operations set-up.

By relying on the iommu_fwspec generic kernel infrastructure,
implement the IORT based IOMMU configuration for ARM ACPI systems
and hook it up in the ACPI kernel layer that implements DMA
configuration for a device.

Signed-off-by: Lorenzo Pieralisi <redacted>
Acked-by: Rafael J. Wysocki <redacted> [ACPI core]
Reviewed-by: Tomasz Nowicki <redacted>
Tested-by: Hanjun Guo <redacted>
Tested-by: Tomasz Nowicki <redacted>
Cc: Hanjun Guo <redacted>

Acked-by: Hanjun Guo <redacted>

Thanks
Hanjun