[PATCH RFC] nvme-ioctl: propagate PRP1 from ioctl to admin cmd

[David Epping]

On Fri, Jun 26, 2026 at 04:22:32PM -0600, Keith Busch wrote:
> On Fri, Jun 26, 2026 at 07:55:32PM +0200, David Epping wrote:
> > Thank you both for your feedback, I get the point. I'll definitely look
> > into using SRIOV or SPDK to migrate the system to an unmodified upstream
> > NVMe driver mid-term.
> 
> SRIOV could definitely get you there with existing capable hardware and
> software as long as you don't need to exceed the VF count, but it is a
> bit heavy for what you're describing.
> 
> My SIOV suggestion is more fine grained for similar use cases, however
> there's no nvme standard or kernel support for the feature, so anything
> using the concepts would be a custom solution; NVMe would need some
> mechanism to associate an IO queue to a PASID, then attach namespace
> access to that queue. After that it's just a matter of implementing the
> "mediated" device.
> 
> If you're interested, this is a recent proposal to generically setup
> SIOV, but it needs some work:
> 
>   https://lore.kernel.org/linux-pci/20260604150153.3619662-1-dimitri.daskalakis1@gmail.com/
> 

Keith, thank you for the follow up and catching my mistake. I noticed the
missing R and just assumed its a typo... Sorry.
I will absolutely look into SIOV to understand the concept!