Re: [Qemu-devel] [PATCH qemu v7 06/14] spapr_iommu: Introduce "enabled" state for TCE table

[Paolo Bonzini]

On 26/05/2015 16:55, Michael Roth wrote:
> > That's not a problem, there's memory_region_set_size for that.
> 
> What on earth, I could've sworn I looked for this... yes I think that
> would solve the issue here. mr_add/mr_del can handle the change in
> offsets, set size can deal with the change and size, and we can then
> move to using an MR allocated at IOMMU creation time.

It's very little used, but that's just because it's not too common.
There's nothing wrong with it. :)

If you do del/set_size/add, you may want to put a
memory_region_transaction_{begin,commit} around the whole dance.

Paolo