linux-kernel - Re: [PATCH v7 03/10] iommu: Add attach handle to struct iopf

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Date: Tue, 18 Jun 2024 09:35:35 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: "Tian, Kevin" <kevin.tian@...el.com>, Jason Gunthorpe <jgg@...pe.ca>,
 Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
 Robin Murphy <robin.murphy@....com>,
 Jean-Philippe Brucker <jean-philippe@...aro.org>,
 Nicolin Chen <nicolinc@...dia.com>, "Liu, Yi L" <yi.l.liu@...el.com>,
 Jacob Pan <jacob.jun.pan@...ux.intel.com>,
 Joel Granados <j.granados@...sung.com>
Cc: baolu.lu@...ux.intel.com, "iommu@...ts.linux.dev"
 <iommu@...ts.linux.dev>,
 "virtualization@...ts.linux-foundation.org"
 <virtualization@...ts.linux-foundation.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 03/10] iommu: Add attach handle to struct iopf_group

On 6/17/24 3:41 PM, Tian, Kevin wrote:
>> From: Lu Baolu <baolu.lu@...ux.intel.com>
>> Sent: Sunday, June 16, 2024 2:12 PM
>>
>> Add a new IOMMU capability flag, IOMMU_CAP_USER_IOASID_TABLE, which
>> indicates if the IOMMU driver supports user-managed PASID tables. In the
>> iopf deliver path, if no attach handle found for the iopf PASID, roll
>> back to RID domain when the IOMMU driver supports this capability.
>>
> 
> above is stale.
> 

Yes. "a new IOMMU capability flag, IOMMU_CAP_USER_IOASID_TABLE" should
be changed to "a static flag in iommu ops".

Best regards,
baolu