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

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Message-ID: <CADnq5_NH0DiyE0M44AzaEQhmSksj13wVwEK_Y2JHj3OLEPs9Mg@mail.gmail.com>
Date: Fri, 16 Jan 2026 10:27:56 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Linus Heckemann <linus@...reibt.jetzt>
Cc: Jason Gunthorpe <jgg@...dia.com>, Min Ma <min.ma@....com>, Lizhi Hou <lizhi.hou@....com>, 
	dri-devel@...ts.freedesktop.org, iommu@...ts.linux.dev, 
	linux-kernel@...r.kernel.org
Subject: Re: amdxdna breaks suspend (was: Re: [PATCH v5 2/8] iommu: Remove IOMMU_DEV_FEAT_SVA)

On Fri, Jan 16, 2026 at 10:12 AM Linus Heckemann <linus@...reibt.jetzt> wrote:
>
> 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?

The xdna driver requires SVA and the IOMMU.

Alex