[PATCH v15 0/3] iommu/arm-smmu-v3: Add stall support

[Jean-Philippe Brucker]

On Tue, Jun 08, 2021 at 12:42:34PM +0100, Will Deacon wrote:
> On Wed, 26 May 2021 18:19:25 +0200, Jean-Philippe Brucker wrote:
> > Add stall support for SMMUv3, enabling I/O page faults and SVA for
> > compatible devices. No change since last version [1], but I'd still like
> > this to be considered for upstream, because there exists hardware and
> > applications.
> > 
> > Stall is implemented by the Kunpeng 920 processor for its compression
> > and crypto accelerators, with which I tested the SVA infrastructure.
> > Using the userspace accelerator API [2], a program can obtain a queue
> > from one of these devices and submit compression or encryption work
> > within the program's address space. UADK [3] provides a library to do
> > this, and there is an openssl plugin [4] to use it.
> > 
> > [...]
> 
> Applied to will (for-joerg/arm-smmu/updates), thanks!
> 
> [1/3] dt-bindings: document stall property for IOMMU masters
>       https://git.kernel.org/will/c/ed1d08b9d0c9
> [2/3] ACPI/IORT: Enable stall support for platform devices
>       https://git.kernel.org/will/c/6522b1e0c78f
> [3/3] iommu/arm-smmu-v3: Add stall support for platform devices
>       https://git.kernel.org/will/c/395ad89d11fd
> 

Thanks!  That concludes most of the SVA work. For SMMUv3 we still need to
figure out DVM, there will be PRI at some point, and I'm sure some
bugfixes but I don't plan to send any other major feature support for the
next cycles.

Thanks,
Jean