[RFC PATCH 18/21] xen/arm: iommu: skip the iommu-map property for PCI devices

[Rahul Singh]

Current code skip the IOMMUS specific properties for the non PCI devices
when handling the dom0 node but there is no support to skip the IOMMUS
specific properties for the PCI devices.

This patch will add the support to skip the IOMMUS specific properties
for the PCI devices.

Signed-off-by: Rahul Singh <rahul.si...@arm.com>
---
 xen/arch/arm/domain_build.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 8e85fb7854..7cd99a6771 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1112,9 +1112,18 @@ static int __init write_properties(struct domain *d, 
struct kernel_info *kinfo,
      * Use "iommu_node" as an indicator of the master device which properties
      * should be skipped.
      */
-    iommu_node = dt_parse_phandle(node, "iommus", 0);
-    if ( iommu_node && device_get_class(iommu_node) != DEVICE_IOMMU )
-        iommu_node = NULL;
+    if ( dt_device_type_is_equal(node, "pci") )
+    {
+        iommu_node = dt_parse_phandle(node, "iommu-map", 1);
+        if ( iommu_node && device_get_class(iommu_node) != DEVICE_IOMMU )
+            iommu_node = NULL;
+    }
+    else
+    {
+        iommu_node = dt_parse_phandle(node, "iommus", 0);
+        if ( iommu_node && device_get_class(iommu_node) != DEVICE_IOMMU )
+            iommu_node = NULL;
+    }
 
     dt_for_each_property_node (node, prop)
     {
-- 
2.25.1