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To: Will Deacon <will.deacon@arm.com>,
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From: Jon Masters <jcm@jonmasters.org>
Organization: World Organi{s,z}ation Of Broken Dreams
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Subject: Re: [PATCH 2/3] iommu/arm-smmu-v3: Add workaround for Cavium
 ThunderX2 erratum #74
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On 05/03/2017 05:47 AM, Will Deacon wrote:
> Hi Geetha,
> 
> On Tue, May 02, 2017 at 12:01:15PM +0530, Geetha Akula wrote:
>> SMMU_IIDR register is broken on T99, that the reason we are using MIDR.
> 
> Urgh, that's unfortunate. In what way is it broken?
> 
>> If using MIDR is not accepted, can we enable errata based on SMMU resource size?
>> some thing like below.
> 
> No, you need to get your model number added to IORT after all if the IIDR
> can't uniqely identify the part.
> 
> Sorry

[I've pinged the IORT author directly with a copy of the above message]

Can folks please take action urgently if the IORT spec needs updating to
accommodate additional vendor IDs.

Jon.