[PATCH v5 9/9] xen/arm: Map ITS doorbell register to IOMMU page tables.

[Stewart Hildebrand]

From: Rahul Singh <rahul.si...@arm.com>

Signed-off-by: Rahul Singh <rahul.si...@arm.com>
---
v4->v5:
* new patch
---
 xen/arch/arm/vgic-v3-its.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c
index 05429030b539..df8f045198a3 100644
--- a/xen/arch/arm/vgic-v3-its.c
+++ b/xen/arch/arm/vgic-v3-its.c
@@ -682,6 +682,18 @@ static int its_handle_mapd(struct virt_its *its, uint64_t 
*cmdptr)
                                          BIT(size, UL), valid);
         if ( ret && valid )
             return ret;
+
+        if ( is_iommu_enabled(its->d) ) {
+            ret = map_mmio_regions(its->d, gaddr_to_gfn(its->doorbell_address),
+                           PFN_UP(ITS_DOORBELL_OFFSET),
+                           maddr_to_mfn(its->doorbell_address));
+            if ( ret < 0 )
+            {
+                printk(XENLOG_ERR "GICv3: Map ITS translation register d%d 
failed.\n",
+                        its->d->domain_id);
+                return ret;
+            }
+        }
     }
 
     spin_lock(&its->its_lock);
-- 
2.42.0