20 Oct
2025
20 Oct
'25
12:28 p.m.
On Fri, Oct 17, 2025 at 08:55:24AM -0300, Jason Gunthorpe wrote:
On Thu, Oct 16, 2025 at 11:32:59PM -0700, Christoph Hellwig wrote:
On Mon, Oct 13, 2025 at 06:26:10PM +0300, Leon Romanovsky wrote:
From: Leon Romanovsky leonro@nvidia.com
Make sure that all VFIO PCI devices have peer-to-peer capabilities enables, so we would be able to export their MMIO memory through DMABUF,
How do you know that they are safe to use with P2P?
All PCI devices are "safe" for P2P by spec. I've never heard of a non-complaint device causing problems in this area.
Real PCIe device, yes. But we have a lot of stuff mascquerading as such with is just emulated or special integrated. I.e. a lot of integrated Intel GPUs claim had issue there.