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

[CLEMENT MATHIEU--DRIF]

Hi Zhenzhong,

I will rebase,

thanks

On 01/05/2024 14:40, Duan, Zhenzhong wrote:
> Caution: External email. Do not open attachments or click links, unless this 
> email comes from a known sender and you know the content is safe.
>
>
> Ah, this is a duplicate effort on stage-1 translation.
>
> Hi Clement,
>
> We had ever sent a rfcv1 series "intel_iommu: Enable stage-1 translation"
> for both emulated and passthrough device, link:
> https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg02740.html
> which now evolves to rfcv2, link:
> https://github.com/yiliu1765/qemu/commits/zhenzhong/iommufd_nesting_rfcv2/
>
> It had addressed recent community comments, also the comments in old history 
> series:
> https://patchwork.kernel.org/project/kvm/cover/20210302203827.437645-1-yi.l.liu@intel.com/
>
> Would you mind rebasing your remaining part, i.e., ATS, PRI emulation, etc on 
> to our rfcv2?
>
> Thanks
> Zhenzhong
>
>> -----Original Message-----
>> From: Cédric Le Goater <clg@redhat.com>
>> Subject: Re: [PATCH intel_iommu 0/7] FLTS for VT-d
>>
>> 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(-)
>>>