Hi Jean-Philippe,
On Thu, Dec 13, 2018 at 12:50:29PM +0000, Jean-Philippe Brucker wrote:
> We already do deferred flush: UNMAP requests are added to the queue by
> iommu_unmap(), and then flushed out by iotlb_sync(). So we switch to the
> host only on iotlb_sync(), or when the request queue is full.
So the mappings can stay in place until iotlb_sync() returns? What
happens when the guest sends a map-request for a region it sent and
unmap request before, but did not call iotlb_sync inbetween?
Regards,
Joerg
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