Subject: Re: [PATCH V7 mlx5-next 09/15] vfio: Extend the device migration protocol with RUNNING_P2P

From: Jason Gunthorpe <[email-masked]>
Date: Wed, 16 Feb 2022 08:11:40 -0400

On Wed, Feb 16, 2022 at 02:52:55AM +0000, Tian, Kevin wrote:

> btw can disabling PCI bus master be a general means for devices which
> don't have a way of blocking P2P to implement RUNNING_P2P? 

I think if it works for a specific device then that device's driver
can use it.

I wouldn't make something general, too likely a device will blow up if
you do this to it.

Jason