From: Robin Murphy <robin.murphy@arm.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Chunyan Zhang <chunyan.zhang@unisoc.com>,
Sheng Xu <sheng.xu@unisoc.com>,
iommu@lists.linux-foundation.org,
Rob Herring <robh+dt@kernel.org>,
Baolin Wang <baolin.wang7@gmail.com>,
Orson Zhai <orsonzhai@gmail.com>
Subject: Re: [PATCH 2/2] iommu: add Unisoc iommu basic driver
Date: Tue, 2 Feb 2021 18:02:15 +0000 [thread overview]
Message-ID: <5e766b74-ab51-8c47-66c1-ca65bc5743cd@arm.com> (raw)
In-Reply-To: <20210202144126.GC32671@8bytes.org>
On 2021-02-02 14:41, Joerg Roedel wrote:
> On Tue, Feb 02, 2021 at 02:34:34PM +0000, Robin Murphy wrote:
>> Nope, I believe if Arm Ltd. had any involvement in this I'd know about it :)
>
> Okay, got confused by thinking of ARM as the CPU architecture, not the
> company :)
> But given the intel/ and amd/ subdirectories refer to company names as
> well, the same is true for arm/.
Right, trying to group IOMMU drivers by supposed CPU architecture is
already a demonstrable non-starter; does intel-iommu count as x86, or
IA-64, or do you want two copies? :P
I somehow doubt anyone would license one of Arm's SMMUs to go in a
RISC-V/MIPS/etc. based SoC, but in principle, they *could*. In fact it's
precisely cases like this one - where silicon vendors come up with their
own little scatter-gather unit to go with their own display controller
etc. - that I imagine are most likely to get reused if the vendor
decides to experiment with different CPUs to reach new market segments.
Robin.
next prev parent reply other threads:[~2021-02-02 18:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 7:32 [PATCH v2 0/2] Add Unisoc iommu basic driver Chunyan Zhang
2021-02-02 7:32 ` [PATCH v2 1/2] dt-bindings: iommu: add bindings for sprd iommu Chunyan Zhang
2021-02-02 7:32 ` [PATCH v2 2/2] iommu: add Unisoc iommu basic driver Chunyan Zhang
2021-02-02 10:42 ` [PATCH " Chunyan Zhang
2021-02-02 14:01 ` Joerg Roedel
2021-02-02 14:34 ` Robin Murphy
2021-02-02 14:41 ` Joerg Roedel
2021-02-02 18:02 ` Robin Murphy [this message]
2021-02-03 1:49 ` Chunyan Zhang
2021-02-02 14:13 ` Joerg Roedel
2021-02-03 1:45 ` Chunyan Zhang
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