tree 33b6bdb0a549f369d0288fea4e250983f3d749c8
parent 3f1866779cf8338e1c8bd32e5f6f5424795ef191
author Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> 1491823259 +0530
committer Joerg Roedel <jroedel@suse.de> 1492698666 +0200

ACPI/IORT: Add function to check SMMUs drivers presence

The IOMMU probe deferral implementation requires a mechanism to detect
if drivers for SMMU components are built-in in the kernel to detect
whether IOMMU configuration for a given device should be deferred (ie
SMMU drivers present but still not probed) or not (drivers not present).

Add a simple function to IORT to detect if SMMU drivers for SMMU
components managed by IORT are built-in in the kernel.

Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Cc: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>