linux-kernel - Re: I got an IOMMU IO page fault. What to do now?

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Message-ID: <5bba36e1-6dd7-8c29-1ec5-97815c8d7dc8@molgen.mpg.de>
Date:   Mon, 25 Oct 2021 13:38:40 +0200
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Christian König <ckoenig.leichtzumerken@...il.com>,
        Jörg Rödel <joro@...tes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Cc:     iommu@...ts.linux-foundation.org,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Xinhui Pan <Xinhui.Pan@....com>, amd-gfx@...ts.freedesktop.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, LKML <linux-kernel@...r.kernel.org>,
        it+linux-iommu@...gen.mpg.de
Subject: Re: I got an IOMMU IO page fault. What to do now?

Dear Christian,


Thank you for your reply.


On 25.10.21 13:23, Christian König wrote:

> not sure how the IOMMU gives out addresses, but the printed ones look 
> suspicious to me. Something like we are using an invalid address like -1 
> or similar.
> 
> Can you try that on an up to date kernel as well? E.g. ideally bleeding 
> edge amd-staging-drm-next from Alex repository.

These are production desktops, so I’d need to talk to the user. 
Currently, Linux 5.10.70 is running.


Kind regards,

Paul