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From: Christoph Hellwig <hch@infradead.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Rob Herring <robh@kernel.org>,
	linux-arm-msm@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
	Will Deacon <will.deacon@arm.com>,
	Christoph Hellwig <hch@infradead.org>,
	iommu@lists.linux-foundation.org,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] iommu: Allow io-pgtable to be used outside of drivers/iommu/
Date: Tue, 5 Feb 2019 22:55:41 -0800	[thread overview]
Message-ID: <20190206065541.GA860@infradead.org> (raw)
In-Reply-To: <a6002b86-e18a-dd97-6dad-ab69e994678d@arm.com>

On Tue, Feb 05, 2019 at 05:12:29PM +0000, Robin Murphy wrote:
> On 05/02/2019 16:55, Christoph Hellwig wrote:
> > On Tue, Feb 05, 2019 at 10:37:31AM -0600, Rob Herring wrote:
> > > Move io-pgtable.h to include/linux/ and export alloc_io_pgtable_ops
> > > and free_io_pgtable_ops. This enables drivers outside drivers/iommu/ to
> > > use the ARM page table library. Specifically, some ARM Mali GPUs use the
> > > ARM page table formats.
> > 
> > Maybe rename it to arm-io-pgtable.h to make the usage a little more
> > clear?
> 
> It's not Arm-specific, though - the whole point of io-pgtable is to be an
> architecture-agnostic library of IOMMU pagetable code. It just happens that
> the only formats implemented so far are the Arm ones that already have more
> than one in-tree user each.

Oh, ok.  I always thought of it as an ARM thing, but then I missed the
intention behind it.

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Rob Herring <robh@kernel.org>,
	linux-arm-msm@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
	Will Deacon <will.deacon@arm.com>,
	Christoph Hellwig <hch@infradead.org>,
	iommu@lists.linux-foundation.org,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] iommu: Allow io-pgtable to be used outside of drivers/iommu/
Date: Tue, 5 Feb 2019 22:55:41 -0800	[thread overview]
Message-ID: <20190206065541.GA860@infradead.org> (raw)
In-Reply-To: <a6002b86-e18a-dd97-6dad-ab69e994678d@arm.com>

On Tue, Feb 05, 2019 at 05:12:29PM +0000, Robin Murphy wrote:
> On 05/02/2019 16:55, Christoph Hellwig wrote:
> > On Tue, Feb 05, 2019 at 10:37:31AM -0600, Rob Herring wrote:
> > > Move io-pgtable.h to include/linux/ and export alloc_io_pgtable_ops
> > > and free_io_pgtable_ops. This enables drivers outside drivers/iommu/ to
> > > use the ARM page table library. Specifically, some ARM Mali GPUs use the
> > > ARM page table formats.
> > 
> > Maybe rename it to arm-io-pgtable.h to make the usage a little more
> > clear?
> 
> It's not Arm-specific, though - the whole point of io-pgtable is to be an
> architecture-agnostic library of IOMMU pagetable code. It just happens that
> the only formats implemented so far are the Arm ones that already have more
> than one in-tree user each.

Oh, ok.  I always thought of it as an ARM thing, but then I missed the
intention behind it.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2019-02-06  6:55 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-05 16:37 [PATCH] iommu: Allow io-pgtable to be used outside of drivers/iommu/ Rob Herring
2019-02-05 16:37 ` Rob Herring
2019-02-05 16:55 ` Christoph Hellwig
2019-02-05 16:55   ` Christoph Hellwig
     [not found]   ` <20190205165528.GA20157-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2019-02-05 17:12     ` Robin Murphy
2019-02-05 17:12       ` Robin Murphy
2019-02-06  6:55       ` Christoph Hellwig [this message]
2019-02-06  6:55         ` Christoph Hellwig
2019-02-05 17:20     ` Rob Herring
2019-02-05 17:20       ` Rob Herring
2019-02-11 10:27       ` Joerg Roedel
2019-02-11 10:27         ` Joerg Roedel

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