Re: [PATCH] iommu/vt-d: Disable DMAR for Intel Q35 IGFX

[Baolu Lu]

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@xxxxxxxxx>
> ---
>   drivers/iommu/intel/iommu.c | 3 +++
>   1 file changed, 3 insertions(+)

Queued for v7.1-rc. Thanks!