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
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
