linux-kernel - Re: [PATCH] iommu/dma: Tidy up Kconfig selects

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Message-ID: <YVLgw1nfEf7U13Mh@8bytes.org>
Date:   Tue, 28 Sep 2021 11:30:43 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     will@...nel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>, x86@...nel.org,
        linux-ia64@...r.kernel.org
Subject: Re: [PATCH] iommu/dma: Tidy up Kconfig selects

On Mon, Sep 13, 2021 at 01:41:19PM +0100, Robin Murphy wrote:
> Now that the dust has settled on converting all the x86 drivers to
> iommu-dma, we can punt the Kconfig selection to arch code where it
> was always intended to be.

Can we select IOMMU_DMA under IOMMU_SUPPORT instead? The only drivers
not using IOMMU_DMA are the arm32 ones, afaics.

If we could get rid of the arm32 exception, the IOMMU_DMA symbol could
also go away entirely and we handle it under IOMMU_SUPPORT instead. But
that is something for the future :)

Regards,

	Joerg