RE: [PATCH v2 13/17] intel_iommu: piotlb invalidation should notify unmap

[Duan, Zhenzhong]

>-----Original Message-----
>From: Liu, Yi L <yi.l.liu@intel.com>
>Subject: Re: [PATCH v2 13/17] intel_iommu: piotlb invalidation should
>notify unmap
>
>On 2024/8/19 17:57, Duan, Zhenzhong wrote:
>>
>>
>>> -----Original Message-----
>>> From: Liu, Yi L <yi.l.liu@intel.com>
>>> Subject: Re: [PATCH v2 13/17] intel_iommu: piotlb invalidation should
>>> notify unmap
>>>
>>> On 2024/8/5 14:27, Zhenzhong Duan wrote:
>>>> This is used by some emulated devices which caches address
>>>> translation result. When piotlb invalidation issued in guest,
>>>> those caches should be refreshed.
>>>
>>> Perhaps I have asked it in the before. :) To me, such emulated devices
>>> should implement an ATS-capability. You may mention the devices that
>>> does not implement ATS-capability, but caches the translation result,
>>> and note that it is better to implement ATS cap if there is need to
>>> cache the translation request.
>>
>> OK, will do. Will be like:
>>
>> "For device that does not implement ATS-capability or disable it
>> but still caches the translation result, it is better to implement ATS cap
>> or enable it if there is need to cache the translation request."
>
>sorry for a typo. s/request/result/

Applied.

Thanks
Zhenzhong