From: Baolu Lu <baolu.lu@linux.intel.com>
To: "Naval Alcalá" <ari@naval.cat>
Cc: David Woodhouse <dwmw2@infradead.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
"open list:INTEL IOMMU (VT-d)" <iommu@lists.linux.dev>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iommu/vt-d: Disable DMAR for Intel Q35 IGFX
Date: Fri, 8 May 2026 15:57:27 +0800 [thread overview]
Message-ID: <d3708d4a-e232-47d6-b807-abfa40b6e93b@linux.intel.com> (raw)
In-Reply-To: <20260410161622.13549-1-ari@naval.cat>
On 4/11/26 00:16, Naval Alcalá wrote:
> Intel Q35 integrated graphics (8086:29b2) exhibits broken DMAR
> behaviour similar to other G4x/GM45 devices for which DMAR is
> already disabled via quirks.
>
> When DMAR is enabled, the system may hard lock up during boot or
> early device initialization, requiring a reset.
>
> This issue has been reported multiple times and remains
> unresolved:
> Link:https://lore.kernel.org/linux-iommu/20161205215841.GA20819@beast/
> Link:https://bugzilla.kernel.org/show_bug.cgi?id=201185
> Link:https://bugzilla.kernel.org/show_bug.cgi?id=216064
>
> Add the missing PCI ID to the existing quirk list to disable
> DMAR for this device.
>
> Signed-off-by: Naval Alcalá<ari@naval.cat>
> ---
> drivers/iommu/intel/iommu.c | 3 +++
> 1 file changed, 3 insertions(+)
Queued for v7.1-rc. Thanks!
parent reply other threads:[~2026-05-08 7:59 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20260410161622.13549-1-ari@naval.cat>]
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