Messages in this thread |  | | Subject | Re: [Intel-gfx] [PATCH v3 0/6] Convert the intel iommu driver to the dma-iommu api | From | Lu Baolu <> | Date | Tue, 22 Sep 2020 08:24:11 +0800 |
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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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