RE: [PATCH v1 0/4] Implement IOMMU SVA page fault processing error notifiers

Posted by Temerkhanov, Sergey 2 months, 3 weeks ago

> -----Original Message-----
> From: Jason Gunthorpe <jgg@ziepe.ca>
> 
> You need to come with a driver using this as well.
> 

There is an OOT driver which would use this facility do report and handle possible invalid accesses (e.g. mismatched VMA permissions) during the SVA operation
https://www.intel.com/content/www/us/en/download/858019/intel-media-transcode-accelerator.html

Regards,
Sergey

Re: [PATCH v1 0/4] Implement IOMMU SVA page fault processing error notifiers

Posted by Jason Gunthorpe 2 months, 3 weeks ago

On Wed, Jul 16, 2025 at 11:07:50AM +0000, Temerkhanov, Sergey wrote:
> > -----Original Message-----
> > From: Jason Gunthorpe <jgg@ziepe.ca>
> > 
> > You need to come with a driver using this as well.
> > 
> 
> There is an OOT driver which would use this facility do report and
> handle possible invalid accesses (e.g. mismatched VMA permissions)
> during the SVA operation

Upstream a basic driver first then ask for iommu changes to enhance
it.

This is normal stuff, we don't change the kernel to accomodate OOT
drivers.

Jason