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[v4,09/15] memory/iommu: Add IOMMU_ATTR_MAX_IOVA attribute

Message ID 20230622214845.3980-10-joao.m.martins@oracle.com (mailing list archive)
State New, archived
Headers show
Series vfio: VFIO migration support with vIOMMU | expand

Commit Message

Joao Martins June 22, 2023, 9:48 p.m. UTC 
From: Avihai Horon <avihaih@nvidia.com>

Add a new IOMMU attribute IOMMU_ATTR_MAX_IOVA which indicates the
maximal IOVA that an IOMMU can use.

This attribute will be used by VFIO device dirty page tracking so it can
track the entire IOVA space when needed (i.e. when vIOMMU is enabled).

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Peter Xu <peterx@redhat.com>
---
 include/exec/memory.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 5d6c2ab1f397..742bff82dc77 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -321,6 +321,7 @@  typedef struct MemoryRegionClass {
 enum IOMMUMemoryRegionAttr {
     IOMMU_ATTR_SPAPR_TCE_FD,
     IOMMU_ATTR_DMA_TRANSLATION,
+    IOMMU_ATTR_MAX_IOVA,
 };
 
 /*