On 04.09.23 10:03, Eric Auger wrote:
> 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)
> {
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Cheers,
David / dhildenb