> From: Jean-Philippe Brucker <jean-phili...@linaro.org> > Sent: Thursday, March 5, 2020 12:47 AM > [...] > > > > > > * We can't use DVM in nested mode unless the VMID is shared with the > > > CPU. For that we'll need the host SMMU driver to hook into the KVM > VMID > > > allocator, just like we do for the ASID allocator. I haven't yet > > > investigated how to do that. It's possible to do vSVA without DVM > > > though, by sending all TLB invalidations through the SMMU command > queue. > > > " > > Hm we're already mandating DVM for host SVA, so I'd say mandate it for > vSVA as well. We'd avoid a ton of context switches, especially for the zip > accelerator which doesn't require ATC invalidations. The host needs to pin > the VMID allocated by KVM and write it in the endpoint's STE. >
Curious... what is DVM and how is it related to SVA? Is it SMMU specific?
