On Wed, Dec 09, 2020 at 07:49:09PM +0000, Krishna Reddy wrote:

quoted

quoted

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,

quoted

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

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel