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

[Cédric Le Goater]

Hello,

Adding a few people in Cc: who are familiar with the Intel IOMMU.

Thanks,

C.




On 4/22/24 17:52, 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
>
> 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(-)