From mboxrd@z Thu Jan  1 00:00:00 1970
From: Suravee Suthikulpanit <suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
Subject: Re: [PATCH 1/1] iommu/amd: Fix PASID format in INVALIDATE_IOTLB_PAGES
	command
Date: Tue, 4 Mar 2014 10:53:50 -0600
Message-ID: <5316051E.2030004@amd.com>
References: <1393451371-17894-1-git-send-email-suravee.suthikulpanit@amd.com>
	<20140304141251.GB2799@8bytes.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
In-Reply-To: <20140304141251.GB2799-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/iommu>,
	<mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/iommu/>
List-Post: <mailto:iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
List-Help: <mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/iommu>,
	<mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=subscribe>
Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
To: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Jay Cornwall <jay.cornwall-5C7GfCeVMHo@public.gmane.org>, Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "Naru,
	Kim" <Kim.Naru-5C7GfCeVMHo@public.gmane.org>
List-Id: iommu@lists.linux-foundation.org

On 3/4/2014 8:12 AM, Joerg Roedel wrote:
> On Wed, Feb 26, 2014 at 03:49:31PM -0600, suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org wrote:
>> From: Jay Cornwall <jay.cornwall-5C7GfCeVMHo@public.gmane.org>
>>
>> This patch corrects the PASID format in the INVALIDATE_IOTLB_PAGES
>> command, which was caused by incorrect information in
>> the AMD IOMMU Architectural Specification v2.01 document.
>>
>>      Incorrect format:
>>           cmd->data[0][16:23] = PASID[7:0]
>>           cmd->data[1][16:27] = PASID[19:8]
>>
>>       Correct format:
>>           cmd->data[0][16:23] = PASID[15:8]
>>           cmd->data[1][16:23] = PASID[7:0]
>>
>> However, this does not affect the IOMMUv2 hardware implementation,
>> and has been corrected since version 2.02 of the specification
>> (available through AMD NDA).
>>
>> Signed-off-by: Jay Cornwall <jay.cornwall-5C7GfCeVMHo@public.gmane.org>
>> Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
>
> Applied, thanks.
>
> Does this mean that PASIDs are only 16 bits wide now from the former 20
> bits?
>
>
>

Thank you Joerg. The specification also state that this command format 
does not support the maximum size of the PASID field. However, other 
commands seem to still support 20-bit PASID.

Suravee