On Wed, Dec 09, 2020 at 07:49:09PM +0000, Krishna Reddy wrote: > > > Why is BTM mandated for SVA? I couldn't find this requirement in > > > SMMU spec (Sorry if I missed it or this got discussed earlier). But > > > if performance is the > > only concern here, > > > is it better just to allow it with a warning rather than limiting > > > SMMUs without > > BTM? > > > > It's a performance concern and requires to support multiple > > configurations, but the spec allows it. Are there SMMUs without BTM > > that need it? > > The Tegra Next Generation SOC uses arm-smmu-v3, but it doesn't have support for BTM. > Do you have plan to get your earlier patch to handle invalidate > notifications into upstream sometime soon? Is that a limitation of the SMMU implementation, the interconnect or the integration? Will
