[RFC v6 02/13] memory: Add IOMMUTLBNotificationType to IOMMUTLBEntry

[Eugenio Pérez]

This way we can tell between MAPs and UNMAP, and potentially avoid to
send them to a notifier that does not require them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/exec/memory.h | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 22c5f564d1..f6d91c54aa 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -59,6 +59,12 @@ struct ReservedRegion {
 
 typedef struct IOMMUTLBEntry IOMMUTLBEntry;
 
+typedef enum {
+    IOMMU_IOTLB_NONE  = 0,
+    IOMMU_IOTLB_UNMAP = 1,
+    IOMMU_IOTLB_MAP   = 2,
+} IOMMUTLBNotificationType;
+
 /* See address_space_translate: bit 0 is read, bit 1 is write.  */
 typedef enum {
     IOMMU_NONE = 0,
@@ -70,11 +76,12 @@ typedef enum {
 #define IOMMU_ACCESS_FLAG(r, w) (((r) ? IOMMU_RO : 0) | ((w) ? IOMMU_WO : 0))
 
 struct IOMMUTLBEntry {
-    AddressSpace    *target_as;
-    hwaddr           iova;
-    hwaddr           translated_addr;
-    hwaddr           addr_mask;  /* 0xfff = 4k translation */
-    IOMMUAccessFlags perm;
+    AddressSpace            *target_as;
+    hwaddr                   iova;
+    hwaddr                   translated_addr;
+    hwaddr                   addr_mask;  /* 0xfff = 4k translation */
+    IOMMUAccessFlags         perm;
+    IOMMUTLBNotificationType type; /* Only valid if it is a notification */
 };
 
 /*
-- 
2.18.1