[v4] vfio: VFIO migration support with vIOMMU

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

Joao Martins posted 15 patches 2 years, 7 months ago

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Maintainers: "Michael S. Tsirkin" <mst@redhat.com>, Peter Xu <peterx@redhat.com>, Jason Wang <jasowang@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, Alex Williamson <alex.williamson@redhat.com>, "Cédric Le Goater" <clg@redhat.com>, David Hildenbrand <david@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>

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

Posted by Joao Martins 2 years, 7 months ago

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(+)

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,
 };
 
 /*
-- 
2.17.2