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

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Date:	Wed, 23 Jan 2013 09:07:17 -0600
From:	Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To:	Joerg Roedel <joro@...tes.org>
CC:	<iommu@...ts.linux-foundation.org>, Borislav Petkov <bp@...en8.de>,
	<linux-kernel@...r.kernel.org>,
	Udo van den Heuvel <udovdh@...all.nl>,
	<ssg.sos.staff@...txmail.amd.com>
Subject: Re: [PATCH 1/1] AMD Family15h Model10-1Fh erratum 746 Workaround

On 1/23/2013 1:06 AM, Joerg Roedel wrote:

> 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.

Inside the function, it checks the family and model number.  Only Trinitiy is affected.

Suravee


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