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 <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]> [ACPI core]
Reviewed-by: Tomasz Nowicki <[email protected]>
Tested-by: Hanjun Guo <[email protected]>
Tested-by: Tomasz Nowicki <[email protected]>
Cc: Hanjun Guo <[email protected]>
Acked-by: Hanjun Guo <[email protected]>
Thanks
Hanjun
