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Re: [Xen-devel] [PATCH] libgnttab: Add support for Linux dma-buf
- To: Oleksandr Andrushchenko <andr2000@xxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Wed, 25 Jul 2018 08:23:51 -0400
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- Cc: jgross@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, ian.jackson@xxxxxxxxxxxxx, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
- Delivery-date: Wed, 25 Jul 2018 12:23:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 07/25/2018 06:00 AM, Oleksandr Andrushchenko wrote:
> On 07/25/2018 12:53 PM, Wei Liu wrote:
>> On Wed, Jul 25, 2018 at 12:49:29PM +0300, Oleksandr Andrushchenko wrote:
>>> On 07/25/2018 12:39 PM, Wei Liu wrote:
>>>> On Mon, Jul 23, 2018 at 03:27:25PM +0300, Oleksandr Andrushchenko
>>>> wrote:
>>>>> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
>>>>>
>>>>> Add support for Linux grant device driver extension which allows
>>>>> converting existing dma-buf's into an array of grant references
>>>>> and vise versa. This is only implemented for Linux as other OSes
>>>>> have no Linux dma-buf support.
>>>>>
>>>>> Bump gnttab library minor version to 3.
>>>>>
>>>>> Signed-off-by: Oleksandr Andrushchenko
>>>>> <oleksandr_andrushchenko@xxxxxxxx>
>>>> Has the Linux side been merged yet?
>>> It is going to be merged into Boris' staging for now
>>> and then eventually move into Xen tip's for-linus (Boris can
>>> tell more on that: Linux is already at rc6, so I think this
>>> can happen in the nearest future).
>>>
>> OK. So the interfaces on Linux's side are agreed.
> Yes
>>
>>> Given that Xen and Linux parts are actually independent,
>>> I decided to start upstreaming libgnttab changes now, allowing
>>> me to mature the code and address comments
>> From my PoV this patch provides a bunch of wrappers around Linux ioctls
>> so I would like to be sure the underlying interfaces are agreed before
>> reviewing.
> Fair enough,
> Boris could you please estimate when the corresponding Linux
> changes have a chance to get into Xen tip Linux tree?
The patches are in my staging tree --
git://git.kernel.org/pub/scm/linux/kernel/git/ostr/linux.git,
for-linus-4.19 branch. I will push this branch to xen tip tree after I
have tested it. Unfortunately my test environment is completely broken
right now so I will need to come up with something in the meantime.
Hopefully in the next couple of days.
Note that I won't be testing the new interfaces.
-boris
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