ACPI/IORT: Add function to check SMMUs drivers presence

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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>

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Lorenzo Pieralisi 2017-04-10 16:50:59 +05:30 • committed by Joerg Roedel

parent 3f1866779c

commit 1d9029d440

1 changed files with 13 additions and 0 deletions

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drivers/acpi/arm64/iort.c

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