ACPI/IORT: Add a helper to retrieve RMR info directly
This will provide a way for SMMU drivers to retrieve StreamIDs associated with IORT RMR nodes and use that to set bypass settings for those IDs. Tested-by: Steven Price <steven.price@arm.com> Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Tested-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/20220615101044.1972-6-shameerali.kolothum.thodi@huawei.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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