linux-kernel - Re: [PATCH V2] iommu/amd - Set the device table entry PPR bit for IOMMU V2 devices

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Message-ID: <29836570-5756-f55a-1d00-074d926ea1d1@amd.com>
Date:   Wed, 20 Dec 2017 13:50:47 -0600
From:   Gary R Hook <gary.hook@....com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] iommu/amd - Set the device table entry PPR bit for
 IOMMU V2 devices

On 12/20/2017 01:02 PM, Alex Williamson wrote:
> On Tue, 19 Dec 2017 16:15:41 -0600
> Gary R Hook <gary.hook@....com> wrote:
> 
>> The AMD IOMMU specification Rev 3.00 (December 2016) introduces a
>> new Enhanced PPR Handling Support (EPHSup) bit in the MMIO register
>> offset 0030h (IOMMU Extended Feature Register).
>>
>> When EPHSup=1, the IOMMU hardware requires the PPR bit of the
>> device table entry (DTE) to be set in order to support PPR for a
>> particular endpoint device.
>>
>> Please see https://support.amd.com/TechDocs/48882_IOMMU.pdf for
>> this revision of the AMD IOMMU specification.
>>
>> Signed-off-by: Gary R Hook <gary.hook@....com>
>> ---
>>   0 files changed
> 
> Hmm, something funky there, but looks fine otherwise.  Applied to
> v4.16-iommu/amd.  Thanks,
> 
> Alex
> 

Thanks. I have no clue why it says "0 files changed". I just looked 
again and it seems fine here.