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Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx

From David Woodhouse <dwmw2@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx
Date 2016-12-05 23:50 +0100
Message-ID <sLaf7-27k-1@gated-at.bofh.it> (permalink)
References <sL9sJ-1xT-13@gated-at.bofh.it> <sL9Cp-1Qs-5@gated-at.bofh.it> <sL9M5-1XN-7@gated-at.bofh.it>
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On Mon, 2016-12-05 at 14:18 -0800, Kees Cook wrote:
> Hm, I have no idea. :) What would I look for in the BIOS?

For a start, what is the actual failure mode?

> I figured since g4 was busted, surely q35 was too, since it's even
> older...

Oh no, they all have different failures. Intel never actually *tested*
their graphics hardware before shipping it, but IIRC it was only Q4x
where we concluded the hardware was just too broken to live.

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Thread

[PATCH] iommu/intel: disable DMAR for Q35 integrated gfx Kees Cook <keescook@chromium.org> - 2016-12-05 23:00 +0100
  Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx David Woodhouse <dwmw2@infradead.org> - 2016-12-05 23:10 +0100
    Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx Kees Cook <keescook@chromium.org> - 2016-12-05 23:20 +0100
      Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx David Woodhouse <dwmw2@infradead.org> - 2016-12-05 23:50 +0100
        Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx Kees Cook <keescook@chromium.org> - 2016-12-06 00:20 +0100

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