Re: [PATCH intel_iommu 0/7] FLTS for VT-d

[Michael S. Tsirkin]

On Mon, Apr 22, 2024 at 03:52:52PM +0000, CLEMENT MATHIEU--DRIF wrote:
> This series is the first of a list that add support for SVM in the Intel 
> IOMMU.
> 
> Here, we implement support for first-stage translation in VT-d.
> The PASID-based IOTLB invalidation is also added in this series as it is a
> requirement of FLTS.
> 
> The last patch introduces the 'flts' option to enable the feature from
> the command line.
> Once enabled, several drivers of the Linux kernel use this feature.
> 
> This work is based on the VT-d specification version 4.1 (March 2023)
> 
> Here is a link to a GitHub repository where you can find the following 
> elements :
>     - Qemu with all the patches for SVM
>         - ATS
>         - PRI
>         - PASID based IOTLB invalidation
>         - Device IOTLB invalidations
>         - First-stage translations
>         - Requests with already translated addresses
>     - A demo device
>     - A simple driver for the demo device
>     - A userspace program (for testing and demonstration purposes)
> 
> https://github.com/BullSequana/Qemu-in-guest-SVM-demo

Pls post v2 addressing minor comments so far.


> Clément Mathieu--Drif (7):
>   intel_iommu: fix FRCD construction macro.
>   intel_iommu: rename slpte to pte before adding FLTS
>   intel_iommu: make types match
>   intel_iommu: add support for first-stage translation
>   intel_iommu: extract device IOTLB invalidation logic
>   intel_iommu: add PASID-based IOTLB invalidation
>   intel_iommu: add a CLI option to enable FLTS
> 
>  hw/i386/intel_iommu.c          | 655 ++++++++++++++++++++++++++-------
>  hw/i386/intel_iommu_internal.h | 114 ++++--
>  include/hw/i386/intel_iommu.h  |   3 +-
>  3 files changed, 609 insertions(+), 163 deletions(-)
> 
> -- 
> 2.44.0