From: Joerg Roedel <joro@8bytes.org>
To: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>, Eric Wong <e@80x24.org>,
David Woodhouse <dwmw2@infradead.org>,
David Airlie <airlied@linux.ie>,
Jani Nikula <jani.nikula@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
"list@263.net:IOMMU DRIVERS <iommu@lists.linux-foundation.org>,
Joerg Roedel <joro@8bytes.org>,
" <iommu@lists.linux-foundation.org>,
intel-gfx <intel-gfx@lists.freedesktop.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iommu/intel: quirk to disable DMAR for QM57 igfx
Date: Tue, 22 Jan 2019 17:51:35 +0100 [thread overview]
Message-ID: <20190122165135.6rkdsxqepvmaoatn@8bytes.org> (raw)
In-Reply-To: <154816850584.8871.13562920355478587539@jlahtine-desk.ger.corp.intel.com>
On Tue, Jan 22, 2019 at 04:48:26PM +0200, Joonas Lahtinen wrote:
> According to our IOMMU folks there exists some desire to be able to assign
> the iGFX device aka have intel_iommu=on instead of intel_iommu=igfx_off
> due to how the devices might be grouped in IOMMU groups. Even when you
> would not be using the iGFX device.
You can force the igfx device into a SI domain, or does that also
trigger the iommu issues on the chipset?
In any case, if iommu=on breaks these systems I want to make them work
again with opt-out, even at the cost of breaking assignability.
Regards,
Joerg
next prev parent reply other threads:[~2019-01-22 16:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-27 11:49 iommu_intel or i915 regression in 4.18, 4.19.12 and drm-tip Eric Wong
2019-01-02 9:42 ` Joonas Lahtinen
2019-01-04 1:06 ` Eric Wong
2019-01-04 8:39 ` Joonas Lahtinen
2019-01-18 12:17 ` [PATCH] iommu/intel: quirk to disable DMAR for QM57 igfx Eric Wong
2019-01-22 10:39 ` Joerg Roedel
2019-01-22 10:46 ` Daniel Vetter
2019-01-22 11:01 ` Joerg Roedel
2019-01-22 14:48 ` Joonas Lahtinen
2019-01-22 16:51 ` Joerg Roedel [this message]
2019-01-23 15:02 ` Joonas Lahtinen
2019-01-23 16:49 ` Joerg Roedel
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