linux-kernel - amdxdna breaks suspend (was: Re: [PATCH v5 2/8] iommu: Remove IOMMU_DEV_FEAT

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Message-ID: <yga3445n4wt.fsf@localhost>
Date: Fri, 16 Jan 2026 13:00:34 +0100
From: Linus Heckemann <linus@...reibt.jetzt>
To: Jason Gunthorpe <jgg@...dia.com>, Min Ma <min.ma@....com>, Lizhi Hou
 <lizhi.hou@....com>, dri-devel@...ts.freedesktop.org
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: amdxdna breaks suspend (was: Re: [PATCH v5 2/8] iommu: Remove
 IOMMU_DEV_FEAT_SVA)

Jason Gunthorpe <jgg@...dia.com> writes:

> On Thu, Dec 25, 2025 at 10:05:59PM +0100, Linus Heckemann wrote:
>> It appears the code removed here was not in fact entirely dead; my 2024
>> gpd win mini ("G1617-01", with a Ryzen 8840U) fails to suspend
>> correctly, and I bisected the issue to this commit.
>
> The only behavior change this patch had that could be relavent to a
> Ryzen was in drivers/accel/amdxdna/aie2_pci.c - are you using this
> driver?
>
> Prior to this patch amdxdna would have failed to load in configs
> without an iommu as iommu_dev_enable_feature() would have
> failed. After this patch it will load successfully.
>
> If so then that driver presmuably doesn't have working power
> management in your system.

You're right, blacklisting the amdxdna driver fixes suspend, thanks for
the pointer!

@Min Ma, Lizhi Hou, dri-devel: do you have any insight into why this
might be happening?

Cheers

Linus H