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iommu/vt-d: Implement reserved region get/put callbacks
This patch registers the [FEE0_0000h - FEF0_000h] 1MB MSI range as a reserved region and RMRR regions as direct regions. This will allow to report those reserved regions in the iommu-group sysfs. Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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