linux-kernel - Re: [PATCH 1/1] AMD Family15h Model10-1Fh erratum 746 Workaround

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Date:	Wed, 23 Jan 2013 08:06:04 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	suravee.suthikulpanit@....com
Cc:	iommu@...ts.linux-foundation.org, bp@...an8.de,
	linux-kernel@...r.kernel.org, udovdh@...all.nl,
	ssg.sos.patches@....com
Subject: Re: [PATCH 1/1] AMD Family15h Model10-1Fh erratum 746 Workaround

On Tue, Jan 22, 2013 at 05:19:10PM -0600, Suthikulpanit, Suravee wrote:
> From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
> @@ -1171,6 +1195,8 @@ static int iommu_init_pci(struct amd_iommu *iommu)
>  		for (i = 0; i < 0x83; i++)
>  			iommu->stored_l2[i] = iommu_read_l2(iommu, i);
>  	}
> +	
> +	amd_iommu_apply_erratum_746(iommu);

This will also be applied to RD890 IOMMUs, right? This workaround should
be limited to Trinity IOMMUs.

Udo, can you please test if you can trigger the erratum again with this
patch?


	Joerg


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