This helper will allow to convey information about valid
IOVA ranges to virtual IOMMUS.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
include/exec/memory.h | 26 ++++++++++++++++++++++++++
softmmu/memory.c | 15 +++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 184cb3a01b..f6fb99dd3f 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -519,6 +519,27 @@ struct IOMMUMemoryRegionClass {
int (*iommu_set_page_size_mask)(IOMMUMemoryRegion *iommu,
uint64_t page_size_mask,
Error **errp);
+ /**
+ * @iommu_set_iova_ranges:
+ *
+ * Propagate information about the usable IOVA ranges for a given IOMMU
+ * memory region. Used for example to propagate host physical device
+ * reserved memory region constraints to the virtual IOMMU.
+ *
+ * Optional method: if this method is not provided, then the default IOVA
+ * aperture is used.
+ *
+ * @nr_ranges: number of IOVA ranges
+ *
+ * @iova_ranges: an array of @nr_ranges usable IOVA ranges
+ *
+ * Returns 0 on success, or a negative error. In case of failure, the error
+ * object must be created.
+ */
+ int (*iommu_set_iova_ranges)(IOMMUMemoryRegion *iommu,
+ uint32_t nr_ranges,
+ struct Range *iova_ranges,
+ Error **errp);
};
typedef struct RamDiscardListener RamDiscardListener;
@@ -1845,6 +1866,11 @@ int
memory_region_iommu_set_page_size_mask(IOMMUMemoryRegion *iommu_mr,
uint64_t page_size_mask,
Error **errp);
+int memory_region_iommu_set_iova_ranges(IOMMUMemoryRegion *iommu,
+ uint32_t nr_ranges,
+ struct Range *iova_ranges,
+ Error **errp);
+
/**
* memory_region_name: get a memory region's name
*
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 7d9494ce70..07499457aa 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1905,6 +1905,21 @@ int
memory_region_iommu_set_page_size_mask(IOMMUMemoryRegion *iommu_mr,
return ret;
}
+int memory_region_iommu_set_iova_ranges(IOMMUMemoryRegion *iommu_mr,
+ uint32_t nr_ranges,
+ struct Range *iova_ranges,
+ Error **errp)
+{
+ IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
+ int ret = 0;
+
+ if (imrc->iommu_set_iova_ranges) {
+ ret = imrc->iommu_set_iova_ranges(iommu_mr, nr_ranges,
+ iova_ranges, errp);
+ }
+ return ret;
+}
+
int memory_region_register_iommu_notifier(MemoryRegion *mr,
IOMMUNotifier *n, Error **errp)
{