From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Magnus Damm <magnus.damm@gmail.com>, iommu@lists.linux-foundation.org
Cc: laurent.pinchart+renesas@ideasonboard.com,
geert+renesas@glider.be, joro@8bytes.org,
linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
horms+renesas@verge.net.au
Subject: Re: [PATCH 2/3] iommu/ipmmu-vmsa: Increase maximum micro-TLBS to 48
Date: Tue, 7 Jun 2016 13:59:56 +0300 [thread overview]
Message-ID: <d09728bb-2a46-e050-3525-757858c17295@cogentembedded.com> (raw)
In-Reply-To: <20160607033936.28687.78365.sendpatchset@little-apple>
Hello.
On 6/7/2016 6:39 AM, Magnus Damm wrote:
> From: Magnus Damm <damm+renesas@opensource.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-TLBd per IPMMU instance however
Micro-TLBs?
> 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@opensource.se>
[...]
MBR, Sergei
next prev parent reply other threads:[~2016-06-07 11:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 3:39 [PATCH 0/3] iommu/ipmmu-vmsa: Initial r8a7796 support Magnus Damm
2016-06-07 3:39 ` [PATCH 1/3] iommu/ipmmu-vmsa: Add r8a7796 DT binding Magnus Damm
2016-06-08 0:17 ` Laurent Pinchart
2016-06-07 3:39 ` [PATCH 2/3] iommu/ipmmu-vmsa: Increase maximum micro-TLBS to 48 Magnus Damm
2016-06-07 10:59 ` Sergei Shtylyov [this message]
2016-06-08 0:17 ` Laurent Pinchart
2016-06-07 3:39 ` [PATCH 3/3] iommu/ipmmu-vmsa: Hook up r8a7796 DT matching code Magnus Damm
2016-06-08 0:18 ` Laurent Pinchart
2016-06-08 7:04 ` Geert Uytterhoeven
2016-06-08 8:05 ` Magnus Damm
2016-06-08 8:48 ` Laurent Pinchart
2016-06-08 9:12 ` Magnus Damm
2016-08-09 13:17 ` Laurent Pinchart
2016-08-09 13:19 ` Laurent Pinchart
2016-06-08 8:07 ` Magnus Damm
2016-06-07 7:31 ` [PATCH 0/3] iommu/ipmmu-vmsa: Initial r8a7796 support Geert Uytterhoeven
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