linux-kernel - Re: [PATCH v2] PCI: Add ATS-disable quirk for AMD Stoney GPUs

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Message-ID: <20170615140421.GB25710@suse.de>
Date:   Thu, 15 Jun 2017 16:04:21 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Drake <drake@...lessm.com>,
        Alexander Deucher <Alexander.Deucher@....com>,
        Samuel Sieb <samuel@...b.net>,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH v2] PCI: Add ATS-disable quirk for AMD Stoney GPUs

Hi Bjorn,

On Fri, Apr 07, 2017 at 04:32:18PM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> ATS is broken on this hardware and causes IOMMU stalls and
> system failure. Disable ATS on these devices to make them
> usable again with IOMMU enabled.
> 
> Note that the commit in the Fixes-tag is not buggy, it
> just uncovers the problem in the hardware by increasing
> the ATS-flush rate.
> 
> Fixes: b1516a14657a ('iommu/amd: Implement flush queue')
> Signed-off-by: Joerg Roedel <jroedel@...e.de>
> ---
>  drivers/pci/quirks.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)

Any more objections on this patch? Please let me know if you want to
have something changed.


Regards,

	Joerg