linux-kernel - Re: [PATCH 1/1] iommu/vt-d: Move PCI PASID enablement to probe path

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Message-ID: <6650ce02-ac85-4cb6-941c-cc7e8b6effc4@amd.com>
Date: Fri, 16 Aug 2024 17:46:13 +0530
From: Vasant Hegde <vasant.hegde@....com>
To: Lu Baolu <baolu.lu@...ux.intel.com>, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
 Jason Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>,
 Yi Liu <yi.l.liu@...el.com>
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: Move PCI PASID enablement to probe path

Hi Lu,


On 8/16/2024 4:19 PM, Lu Baolu wrote:
> Currently, PCI PASID is enabled alongside PCI ATS when an iommu domain is
> attached to the device and disabled when the device transitions to block
> translation mode. This approach is inappropriate as PCI PASID is a device
> feature independent of the type of the attached domain.

Reading through other thread, I thought we want to enable both PASID and PRI in
device probe path. Did I miss something?

-Vasant