On Fri, Jul 23, 2021 at 05:36:17AM +0000, Tian, Kevin wrote:

quoted

quoted

And a new set of IOMMU-API:

    - iommu_{un}bind_pgtable(domain, dev, addr);
    - iommu_{un}bind_pgtable_pasid(domain, dev, addr, pasid);
    - iommu_cache_invalidate(domain, dev, invalid_info);

What caches is this supposed to "invalidate"?

pasid cache, iotlb or dev_iotlb entries that are related to the bound 
pgtable. the actual affected cache type and granularity (device-wide,
pasid-wide, selected addr-range) are specified by the caller.

Maybe call it pgtable_invalidate or similar?  To avoid confusing it
with the CPUs dcache.

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