linux-kernel - Re: [PATCH v2 2/6] iommu/ipmmu-vmsa: Prepare to handle 40-bit error addresses

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Message-ID: <20190411082340.rtqnhizeb4njafmk@verge.net.au>
Date:   Thu, 11 Apr 2019 10:23:40 +0200
From:   Simon Horman <horms@...ge.net.au>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Joerg Roedel <joro@...tes.org>,
        Magnus Damm <damm+renesas@...nsource.se>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        iommu@...ts.linux-foundation.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/6] iommu/ipmmu-vmsa: Prepare to handle 40-bit error
 addresses

On Wed, Apr 03, 2019 at 08:21:44PM +0200, Geert Uytterhoeven wrote:
> On R-Car Gen3, the faulting virtual address is a 40-bit address, and
> comprised of two registers.  Read the upper address part, and combine
> both parts, when running on a 64-bit system.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> Apart from this, the driver doesn't support 40-bit IOVA addresses yet.

None the less this seems like progress.

Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>