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Message-ID: <5bba36e1-6dd7-8c29-1ec5-97815c8d7dc8@molgen.mpg.de>
Date:   Mon, 25 Oct 2021 13:38:40 +0200
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Subject: Re: I got an IOMMU IO page fault. What to do now?
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To:     =?UTF-8?Q?Christian_K=c3=b6nig?= <ckoenig.leichtzumerken@gmail.com>,
        =?UTF-8?B?SsO2cmcgUsO2ZGVs?= <joro@8bytes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc:     iommu@lists.linux-foundation.org,
        Alex Deucher <alexander.deucher@amd.com>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>,
        Xinhui Pan <Xinhui.Pan@amd.com>, amd-gfx@lists.freedesktop.org,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, LKML <linux-kernel@vger.kernel.org>,
        it+linux-iommu@molgen.mpg.de
References: <7a5123b0-6370-59dc-f0c2-8be5b370d9ba@molgen.mpg.de>
 <0cfccc44-6cc6-98f5-ecd6-2f376839ec18@gmail.com>
From:   Paul Menzel <pmenzel@molgen.mpg.de>
In-Reply-To: <0cfccc44-6cc6-98f5-ecd6-2f376839ec18@gmail.com>
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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