Re: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3

[Jason Gunthorpe]

On Thu, Feb 06, 2025 at 03:07:06PM +0000, Shameerali Kolothum Thodi wrote:
> > If we set the physical/guest SMMU relationship directly, then at the
> > time the VFIO device is plugged, we can diagnose the incorrectly
> > placed VFIO device, and better reason about behaviour.
> 
> Agree.

Can you just take in a VFIO cdev FD reference on this command line:

 -device arm-smmuv3-accel,id=smmuv2,bus=pcie.2

And that will lock the pSMMU/vSMMU relationship?

Jason