linux-kernel - Re: [PATCH v3 1/1] PCI/ATS: Check PRI supported on the PF device when SRIOV is enabled

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Message-ID: <20200724084859.GQ27672@8bytes.org>
Date:   Fri, 24 Jul 2020 10:48:59 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Ashok Raj <ashok.raj@...el.com>
Cc:     linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lu Baolu <baolu.lu@...el.com>, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Subject: Re: [PATCH v3 1/1] PCI/ATS: Check PRI supported on the PF device
 when SRIOV is enabled

On Thu, Jul 23, 2020 at 03:37:29PM -0700, Ashok Raj wrote:
> PASID and PRI capabilities are only enumerated in PF devices. VF devices
> do not enumerate these capabilites. IOMMU drivers also need to enumerate
> them before enabling features in the IOMMU. Extending the same support as
> PASID feature discovery (pci_pasid_features) for PRI.
> 
> Fixes: b16d0cb9e2fc ("iommu/vt-d: Always enable PASID/PRI PCI capabilities before ATS")
> Signed-off-by: Ashok Raj <ashok.raj@...el.com>

Acked-by: Joerg Roedel <jroedel@...e.de>