RE: [PATCH 0/2] PCI/P2PDMA: Allow P2PDMA in VMware and Hyper-V guests on Intel hosts

[Popov, Pavel E]

Leon,

Understood on all points, and I agree HMAT is the proper fix. We discussed
it with Lukas Wunner as well. Exposing HMAT is on the hypervisor side; Jim
Chow from VMware can speak to their plans. Even once HMAT lands in Linux,
it only helps guests after the hypervisors add support for it.

The key point for us is that today there is no path at all for
passthrough devices on VMware or Hyper-V, and that is what this patch
addresses. We reviewed it with VMware and aligned on this approach for the
guest in the meantime.

Is there anything you would recommend to make the series acceptable as an
interim? Bjorn, Logan, your view would help here as well.