[RFC v3 05/10] iommu: Do not map reserved regions

[Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

As we introduced IOMMU_RESV_NOMAP and IOMMU_RESV_MSI regions,
let's prevent those new regions from being mapped.

Signed-off-by: Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/iommu/iommu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 6ee529f..a4530ad 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -343,6 +343,9 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group,
 		start = ALIGN(entry->start, pg_size);
 		end   = ALIGN(entry->start + entry->length, pg_size);
 
+		if (entry->prot & IOMMU_RESV_MASK)
+			continue;
+
 		for (addr = start; addr < end; addr += pg_size) {
 			phys_addr_t phys_addr;
 
-- 
1.9.1