linux-kernel - Re: [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu api

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Date:   Mon, 2 Nov 2020 10:00:29 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>, Tom Murphy <murphyt7@....ie>,
        David Woodhouse <dwmw2@...radead.org>,
        Christoph Hellwig <hch@...radead.org>
Cc:     baolu.lu@...ux.intel.com, Ashok Raj <ashok.raj@...el.com>,
        Intel-gfx@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu
 api

Hi Tvrtko,

On 10/12/20 4:44 PM, Tvrtko Ursulin wrote:
> 
> On 29/09/2020 01:11, Lu Baolu wrote:
>> Hi Tvrtko,
>>
>> On 9/28/20 5:44 PM, Tvrtko Ursulin wrote:
>>>
>>> On 27/09/2020 07:34, Lu Baolu wrote:
>>>> Hi,
>>>>
>>>> The previous post of this series could be found here.
>>>>
>>>> https://lore.kernel.org/linux-iommu/20200912032200.11489-1-baolu.lu@linux.intel.com/ 
>>>>
>>>>
>>>> This version introduce a new patch [4/7] to fix an issue reported here.
>>>>
>>>> https://lore.kernel.org/linux-iommu/51a1baec-48d1-c0ac-181b-1fba92aa428d@linux.intel.com/ 
>>>>
>>>>
>>>> There aren't any other changes.
>>>>
>>>> Please help to test and review.
>>>>
>>>> Best regards,
>>>> baolu
>>>>
>>>> Lu Baolu (3):
>>>>    iommu: Add quirk for Intel graphic devices in map_sg
>>>
>>> Since I do have patches to fix i915 to handle this, do we want to 
>>> co-ordinate the two and avoid having to add this quirk and then later 
>>> remove it? Or you want to go the staged approach?
>>
>> I have no preference. It depends on which patch goes first. Let the
>> maintainers help here.
> 
> FYI we have merged the required i915 patches to out tree last week or 
> so. I *think* this means they will go into 5.11. So the i915 specific 
> workaround patch will not be needed in Intel IOMMU.

Do you mind telling me what's the status of this fix patch? I tried this
series on v5.10-rc1 with the graphic quirk patch dropped. I am still
seeing dma faults from graphic device.

Best regards,
baolu

> 
> Regards,
> 
> Tvrtko