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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Logan Gunthorpe <logang@deltatee.com>,
	Joerg Roedel <joro@8bytes.org>, Tom Murphy <murphyt7@tcd.ie>,
	David Woodhouse <dwmw2@infradead.org>,
	Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org, Intel-gfx@lists.freedesktop.org,
	Ashok Raj <ashok.raj@intel.com>,
	iommu@lists.linux-foundation.org
Subject: Re: [Intel-gfx] [PATCH v3 0/6] Convert the intel iommu driver to the dma-iommu api
Date: Tue, 22 Sep 2020 08:24:11 +0800	[thread overview]
Message-ID: <c8bde158-50f6-1656-4a7d-6323573ba501@linux.intel.com> (raw)
In-Reply-To: <e95a55ea-b03f-4b3c-327a-b48d364577e9@deltatee.com>

Hi Logan,

On 9/21/20 11:48 PM, Logan Gunthorpe wrote:
> 
> 
> On 2020-09-20 12:36 a.m., Lu Baolu wrote:
>> Hi Logan,
>>
>> On 2020/9/19 4:47, Logan Gunthorpe wrote:
>>> Hi Lu,
>>>
>>> On 2020-09-11 9:21 p.m., Lu Baolu wrote:
>>>> Tom Murphy has almost done all the work. His latest patch series was
>>>> posted here.
>>>>
>>>> https://lore.kernel.org/linux-iommu/20200903201839.7327-1-murphyt7@tcd.ie/
>>>>
>>>> Thanks a lot!
>>>>
>>>> This series is a follow-up with below changes:
>>>>
>>>> 1. Add a quirk for the i915 driver issue described in Tom's cover
>>>> letter.
>>>> 2. Fix several bugs in patch "iommu: Allow the dma-iommu api to use
>>>> bounce buffers" to make the bounce buffer work for untrusted devices.
>>>> 3. Several cleanups in iommu/vt-d driver after the conversion.
>>>>
>>>
>>> I'm trying to test this on an old Sandy Bridge, but found that I get
>>> spammed with warnings on boot. I've put a sample of a few of them below.
>>> They all seem to be related to ioat.
>>>
>>> I had the same issue with Tom's v2 but never saw this on his v1.
>>
>> Have you verified whether this could be reproduced with the lasted
>> upstream kernel (without this patch series)?
> 
> Yes.

I am sorry. Just want to make sure I understand you correctly. :-) When
you say "yes", do you mean you could reproduce this with pure upstream
kernel (5.9-rc6)?

> Also, it's hitting a warning in the dma-iommu code which would not
> be hit without this patch set.

Without this series, DMA APIs don't go through dma-iommu. Do you mind
posting the warning message?

Best regards,
baolu
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  reply	other threads:[~2020-09-22  0:30 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-12  3:21 Lu Baolu
2020-09-12  3:21 ` [PATCH v3 1/6] iommu: Handle freelists when using deferred flushing in iommu drivers Lu Baolu
2020-09-12  3:21 ` [PATCH v3 2/6] iommu: Add iommu_dma_free_cpu_cached_iovas() Lu Baolu
2020-09-12  3:21 ` [PATCH v3 3/6] iommu: Allow the dma-iommu api to use bounce buffers Lu Baolu
2020-09-12  3:21 ` [PATCH v3 4/6] iommu: Add quirk for Intel graphic devices in map_sg Lu Baolu
2020-09-12  3:21 ` [PATCH v3 5/6] iommu/vt-d: Convert intel iommu driver to the iommu ops Lu Baolu
2020-09-12  3:22 ` [PATCH v3 6/6] iommu/vt-d: Cleanup after converting to dma-iommu ops Lu Baolu
2020-09-14  8:04 ` [PATCH v3 0/6] Convert the intel iommu driver to the dma-iommu api Tvrtko Ursulin
2020-09-15  1:47   ` Lu Baolu
2020-09-15  8:31     ` Tvrtko Ursulin
2020-09-22 11:05       ` Robin Murphy
2020-09-23  5:38         ` Lu Baolu
2020-09-24  2:35       ` Lu Baolu
2020-09-18 20:47 ` [Intel-gfx] " Logan Gunthorpe
2020-09-20  6:36   ` Lu Baolu
2020-09-21 15:48     ` Logan Gunthorpe
2020-09-22  0:24       ` Lu Baolu [this message]
2020-09-22 15:38         ` Logan Gunthorpe
2020-09-22  9:51   ` Robin Murphy
2020-09-22 18:45     ` Logan Gunthorpe

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