Re: [PATCH v9 14/16] drivers: acpi: iort: replace rid map type with type mask

From: Hanjun Guo
Date: Tue Nov 29 2016 - 07:29:49 EST

On 2016/11/21 18:01, Lorenzo Pieralisi wrote:
IORT tables provide data that allow the kernel to carry out
device ID mappings between endpoints and system components
(eg interrupt controllers, IOMMUs). When the mapping for a
given device ID is carried out, the translation mechanism
is done on a per-subsystem basis rather than a component
subtype (ie the IOMMU kernel layer will look for mappings
from a device to all IORT node types corresponding to IOMMU
components), therefore the corresponding mapping API should
work on a range (ie mask) of IORT node types corresponding
to a common set of components (eg IOMMUs) rather than a
specific node type.

Upgrade the IORT iort_node_map_rid() API to work with a
type mask instead of a single node type so that it can
be used for mappings that span multiple components types
(ie IOMMUs).

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Reviewed-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
Tested-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Tested-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
Cc: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Cc: Tomasz Nowicki <tn@xxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
drivers/acpi/arm64/iort.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

Acked-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>