Arch Linux

Harey

Member

From: Bavaria, Germany

Registered: 2007-03-24

Posts: 374

[SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

The new kernel linux 4.19.arch1-1 generates this warning in journal:

Okt 28 11:27:54 gruenix kernel: *************************************************************
Okt 28 11:27:54 gruenix kernel: **     NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE    **
Okt 28 11:27:54 gruenix kernel: **                                                         **
Okt 28 11:27:54 gruenix kernel: **  IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL  **
Okt 28 11:27:54 gruenix kernel: **                                                         **
Okt 28 11:27:54 gruenix kernel: ** This means that this kernel is built to expose internal **
Okt 28 11:27:54 gruenix kernel: ** IOMMU data structures, which may compromise security on **
Okt 28 11:27:54 gruenix kernel: ** your system.                                            **
Okt 28 11:27:54 gruenix kernel: **                                                         **
Okt 28 11:27:54 gruenix kernel: ** If you see this message and you are not debugging the   **
Okt 28 11:27:54 gruenix kernel: ** kernel, report this immediately to your vendor!         **
Okt 28 11:27:54 gruenix kernel: **                                                         **
Okt 28 11:27:54 gruenix kernel: **     NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE    **
Okt 28 11:27:54 gruenix kernel: *************************************************************

From what I can tell, this looks severe. Is this only on my system or is it a basic kernel problem?

Greetings
Harvey

Last edited by Harey (2018-11-05 13:59:58)

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Linux is like a wigwam: No Gates, no Windows and an Apache inside

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,033

Re: [SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

It appears that's  a new option introduced here :  https://git.kernel.org/pub/scm/linux/ke … e4e229baca

Looks like the question should be :
Why does archlinux kernel enable this new option ?

I suggest you create a bug report.

Last edited by Lone_Wolf (2018-10-28 13:40:13)

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

damjan

Member

Registered: 2006-05-30

Posts: 454

Re: [SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

there's already a bug
https://bugs.archlinux.org/task/60606

Harey

Member

From: Bavaria, Germany

Registered: 2007-03-24

Posts: 374

Re: [SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

Thank you both for your input. So let's see what the devs decide...

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Linux is like a wigwam: No Gates, no Windows and an Apache inside

WFV

Member

From: ☭USSA⛧⭒⭒⭒⭒

Registered: 2013-04-23

Posts: 288

Re: [SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

try re-install, it looks disabled now

Last edited by WFV (2018-11-05 00:42:17)

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∞ hard times make the strong, the strong make good times, good times make the weak, the weak make hard times ∞

Harey

Member

From: Bavaria, Germany

Registered: 2007-03-24

Posts: 374

Re: [SOLVED] IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL

Yep. Solved with 4.19.1

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Linux is like a wigwam: No Gates, no Windows and an Apache inside