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Re: [Xen-devel] [PATCH 7/7] x86: add iommu_ops to map and unmap pages, and also to flush the IOTLB

> From: Paul Durrant
> Sent: Monday, February 12, 2018 6:47 PM
> This patch adds iommu_ops to allow a domain with control_iommu
> privilege
> to map and unmap pages from any guest over which it has mapping
> privilege
> in the IOMMU.
> These operations implicitly disable IOTLB flushing so that the caller can
> batch operations and then explicitly flush the IOTLB using the iommu_op
> also added by this patch.

given that last discussion is 2yrs ago and you said actual implementation
already biased from original spec, it'd be difficult to judge whether current
change is sufficient or just 1st step. Could you summarize what have
been changed from last spec, and also any further tasks in your TODO list?

at least just map/unmap operations definitely not meet XenGT requirement...

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