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From:   Rob Herring <robh@kernel.org>
Date:   Thu, 10 Oct 2019 10:32:09 -0500
Message-ID: <CAL_Jsq+OajTgKoV2gWQCfGbE32LNp23tjgOpTTLcwLx19jBU9A@mail.gmail.com>
Subject: Re: [PATCH v2] xen: Stop abusing DT of_dma_configure API
To:     Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc:     Oleksandr Andrushchenko <Oleksandr_Andrushchenko@epam.com>,
        "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Julien Grall <julien.grall@arm.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
        Juergen Gross <jgross@suse.com>,
        Stefano Stabellini <sstabellini@kernel.org>,
        Christoph Hellwig <hch@lst.de>
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On Thu, Oct 10, 2019 at 9:00 AM Boris Ostrovsky
<boris.ostrovsky@oracle.com> wrote:
>
> On 10/9/19 7:42 AM, Oleksandr Andrushchenko wrote:
> > On 10/8/19 10:41 PM, Rob Herring wrote:
> >> As the removed comments say, these aren't DT based devices.
> >> of_dma_configure() is going to stop allowing a NULL DT node and calling
> >> it will no longer work.
> >>
> >> The comment is also now out of date as of commit 9ab91e7c5c51 ("arm64:
> >> default to the direct mapping in get_arch_dma_ops"). Direct mapping
> >> is now the default rather than dma_dummy_ops.
> >>
> >> According to Stefano and Oleksandr, the only other part needed is
> >> setting the DMA masks and there's no reason to restrict the masks to
> >> 32-bits. So set the masks to 64 bits.
> >>
> >> Cc: Robin Murphy <robin.murphy@arm.com>
> >> Cc: Julien Grall <julien.grall@arm.com>
> >> Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> >> Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> >> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> >> Cc: Juergen Gross <jgross@suse.com>
> >> Cc: Stefano Stabellini <sstabellini@kernel.org>
> >> Cc: Christoph Hellwig <hch@lst.de>
> >> Cc: xen-devel@lists.xenproject.org
> >> Signed-off-by: Rob Herring <robh@kernel.org>
> > Acked-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>
>
> Is this going to go via drm tree or should I pick it up for Xen tree?

Please apply to the Xen tree.

Rob