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Date:	Mon, 24 Mar 2014 16:48:06 +0100
From:	Joerg Roedel <>
Subject: Re: [PATCH V2] iommu/amd: Fix logic to determine and checking max

On Wed, Mar 05, 2014 at 06:54:18PM -0600, wrote:
> From: Suravee Suthikulpanit <>
> In reality, the spec can only support 16-bit PASID since
> INVALIDATE_IOTLB_PAGES and COMPLETE_PPR_REQUEST commands only allow 16-bit
> PASID. So, we updated the PASID_MASK accordingly and invoke BUG_ON
> if the hardware is reporting PASmax more than 16-bit.
> Besides, max PASID is defined as ((2^(PASmax+1)) - 1). The current does not
> determine this correctly.
> Signed-off-by: Suravee Suthikulpanit <>
> Tested-by: Jay Cornwall <>

Applied, thanks.

Btw, is there any publicly available driver/way/whatever for me to test the
AMD IOMMUv2 code paths?


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