ACPI/IORT: Check ATS capability in root complex nodes

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Root complex node in IORT has a bit telling whether it supports ATS or
not. Store this bit in the IOMMU fwspec when setting up a device, so it
can be accessed later by an IOMMU driver. In the future we'll probably
want to store this bit at the host bridge or SMMU rather than in each
endpoint.

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Jean-Philippe Brucker 2019-04-17 19:24:42 +01:00 • committed by Will Deacon

parent b9ae16d80a

commit 5702ee2418

2 changed files with 15 additions and 0 deletions

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11

drivers/acpi/arm64/iort.c

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4

include/linux/iommu.h

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