lkml.org 
[lkml]   [2020]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [Issue]platform/x86: iommu: System can't shutdown because iommu driver keeps checking the status of DMA_GSTS_TES
From
Date
Hi Koba KO,

On 2020/7/7 11:27, Koba Ko wrote:
> Dear Baolu,
> On Tue, Jun 30, 2020 at 3:52 PM Lu Baolu <baolu.lu@linux.intel.com> wrote:
>>
>> Hi Koba,
>>
>> On 2020/6/30 15:31, Koba Ko wrote:
>>> On Mon, Jun 15, 2020 at 3:20 PM Lu Baolu <baolu.lu@linux.intel.com> wrote:
>>>>
>>>> Hi Koba Ko,
>>>>
>>>> On 2020/6/15 11:19, Koba Ko wrote:
>>>>> hi All,
>>>>> I have a machine and there's only intel gpu.
>>>>> the secureboot and vt-d is enabled in BIOS.
>>>>> On the Ubuntu desktop, I do s2idle first and restart the machine.
>>>>> The machine can't restart successfully, so I need to press the
>>>>> power button to shutdown.
>>>>> I tried each of the following and the issue can't be triggered.
>>>>> 1. disable secure boot in BIOS.
>>>>> 2. intel_iommu=off.
>>>>> 3. intel_iomm=igfx_off.
>>>>> 4. nomodeset
>>>>> 5. i915.modeset=0.
>>>>>
>>>>> After I investigate further, find inte_iommu keeps checking the status
>>>>> of DMA_GSTS_TES.
>>>>> During the procedure of restart, the driver would disable iommu
>>>>> translation and
>>>>> check status of DMA_GSTS_TES until status of DMA_GSTS_TES is 0.
>>>>>
>>>>> If you need more information, I can provide it.
>>>>
>>>> Do you mind telling what platform is it?
>>>>
>>>> Best regards,
>>>> baolu
>>> Hi Baolu,
>>> Sorry, i missed your email.
>>> I'm running on TGL.
>>> My colleague has reported this on bugzilla.
>>> Have tested your patch and it works fine.
>>> https://bugzilla.kernel.org/show_bug.cgi?id=208363
>>>
>>> Could you explain more about these patches!? Why do we need a flag
>>> for active iommu!?
>>>
>>
>> We're still investigating this issue. If we find out more, I'll let you
>> know. Thanks a lot for the reporting.
>>
>> Best regards,
>> baolu
>>
> Sorry for disturbing,
> Do you have any updates for this issue?!
> https://bugzilla.kernel.org/show_bug.cgi?id=208363

We are in process of collecting what kind of platforms are affected. I
will push the workaround patch to the community as soon as we are done.

Best regards,
baolu

\
 
 \ /
  Last update: 2020-07-07 09:29    [W:0.072 / U:2.700 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site