Re: [PATCH v1 15/22] Add iommufd configure option

[Jason Gunthorpe]

On Wed, Sep 20, 2023 at 12:17:24PM -0600, Alex Williamson wrote:

> > The iommufd design requires one open of the /dev/iommu to be shared
> > across all the vfios.
> 
> "requires"?  It's certainly of limited value to have multiple iommufd
> instances rather than create multiple address spaces within a single
> iommufd, but what exactly precludes an iommufd per device if QEMU, or
> any other userspace so desired?  Thanks,

>From the kernel side requires is too strong I suppose

Not sure about these qemu patches though?

Jason