Re: FW: About the patch ”https://lore.kernel.org/linux-iommu/20240412082121.33382-1-yi.l.liu@intel.com/ “ for help

[Yi Liu <yi.l.liu@intel.com>]

On 2024/7/23 14:52, XueMei Yue wrote:
> Hi Yi Liu,
> Thanks for your suggestion!
> we have tested ATS without PASID successfully.
> Now I want use PASID to verify other function.maybe not related to ATS.
> Could you give some suggestion about my example "iommufd0716.cpp", How to make it run successfully via linux user API ?
> Thanks very much !

you need to make the pasid attach path work first. As I mentioned, the AMD
driver does not support it yet.

> -----Original Message-----
> From: Yi Liu <yi.l.liu@intel.com>
> Sent: 2024年7月23日 12:06
> To: XueMei Yue <xuemeiyue@petaio.com>; iommu@lists.linux.dev; alex.williamson@redhat.com; robin.murphy@arm.com; eric.auger@redhat.com; nicolinc@nvidia.com; kvm@vger.kernel.org; chao.p.peng@linux.intel.com; baolu.lu@linux.intel.com; joro@8bytes.org; Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> Subject: Re: FW: About the patch ”https://lore.kernel.org/linux-iommu/20240412082121.33382-1-yi.l.liu@intel.com/ “ for help
> 
> CAUTION: This email originated from outside of PetaIO. Do not click on links or open attachments unless you recognize the sender and know that the content is safe.
> 
> 
> On 2024/7/23 11:22, XueMei Yue wrote:
>> Thank you for your reply！
>> My pc has the PASID capability, See the attachment.
> 
> ok.
> 
> BTW. A heads up: you are looping the mailing list, so you'd better use the plain text format and avoid including pictures if it can be expressed by text.
> 
>>    " I don't think the AMD iommu driver has supported the set_dev_pasid callback for the non-SVA domains."
>>      ------ xuemei :  So if I want to use the PASID to test PCIE ATS request messages,could you give some suggestions ? usr SVA domain can solve thie issue ?
> 
> You should not mix ATS with PASID, ATS does not rely on PASID. You should be able to test ATS without PASID. ATS is a performance feature, so if you want to test it in system level, you need a benchmark to do it. Or you can test it in pci transaction level, you would need tools for it then. It's up to you.
> 
> --
> Regards,
> Yi Liu

-- 
Regards,
Yi Liu