linux-kernel - Re: [PATCH v2 2/3] iommu/ipmmu-vmsa: Increase maximum micro-TLBS to 48

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Message-ID: <20170127114724.GI27598@8bytes.org>
Date:   Fri, 27 Jan 2017 12:47:24 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Magnus Damm <magnus.damm@...il.com>
Cc:     iommu@...ts.linux-foundation.org,
        laurent.pinchart+renesas@...asonboard.com, geert+renesas@...der.be,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        horms+renesas@...ge.net.au
Subject: Re: [PATCH v2 2/3] iommu/ipmmu-vmsa: Increase maximum micro-TLBS to
 48

On Mon, Jan 23, 2017 at 08:40:29PM +0900, Magnus Damm wrote:
> From: Magnus Damm <damm+renesas@...nsource.se>
> 
> Bump up the maximum numbers of micro-TLBS to 48.
> 
> Each IPMMU device instance get micro-TLB assignment via
> the "iommus" property in DT. Older SoCs tend to use a
> maximum number of 32 micro-TLBs per IPMMU instance however
> newer SoCs such as r8a7796 make use of up to 48 micro-TLBs.
> 
> At this point no SoC specific handling is done to validate
> the maximum number of micro-TLBs, and because of that the
> DT information is assumed to be within correct range for
> each particular SoC.
> 
> If needed in the future SoC specific feature flags can be
> added to handle the maximum number of micro-TLBs without
> requiring DT changes, however at this point this does not
> seem necessary.
> 
> Signed-off-by: Magnus Damm <damm+renesas@...nsource.se>

I get a conflict when applying this to v4.10-rc5. What is this based on,
any patches I missed?


	Joerg