Messages in this thread | | | Subject | Re: [PATCH v4 0/6] virtio core DMA API conversion | From | Benjamin Herrenschmidt <> | Date | Wed, 11 Nov 2015 09:27:07 +1100 |
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On Tue, 2015-11-10 at 10:54 -0800, Andy Lutomirski wrote: > > Does that work on powerpc on existing kernels? > > Anyway, here's another crazy idea: make the quirk assume that the > IOMMU is bypasses if and only if the weak barriers bit is set on > systems that are missing the new DT binding.
"New DT bindings" doesn't mean much ... how do we change DT bindings on existing machines with a FW in flash ?
What about partition <-> partition virtio such as what we could do on PAPR systems. That would have the weak barrier bit.
Ben.
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