linux-kernel - [Bug 209321] DMAR: [DMA Read] Request device [03:00.0] PASID ffffffff fault addr fffd3000 [fault reason 06] PTE Read access is not set

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Message-ID: <20201007154314.GA3245607@bjorn-Precision-5520>
Date:   Wed, 7 Oct 2020 10:43:14 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-pci@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     Todd Brandt <todd.e.brandt@...ux.intel.com>,
        Len Brown <lenb@...nel.org>, Joerg Roedel <joro@...tes.org>,
        linux-kernel@...r.kernel.org
Subject: [Bug 209321] DMAR: [DMA Read] Request device [03:00.0] PASID
 ffffffff fault addr fffd3000 [fault reason 06] PTE Read access is not set

https://bugzilla.kernel.org/show_bug.cgi?id=209321

Not much detail in the bugzilla yet, but apparently this started in
v5.8.0-rc1:

  DMAR: [DMA Read] Request device [03:00.0] PASID ffffffff fault addr fffd3000 [fault reason 06] PTE Read access is not set

Currently assigned to Driver/PCI, but not clear to me yet whether PCI
is the culprit or the victim.