Re: AMD-Vi: Unable to write to IOMMU perf counter.

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Hello Bjorn,

On 02/04/2016 at 04:23 PM Bjorn Helgaas wrote:
> [+cc Joerg, iommu list]
> 
> Hi Andreas,
> 
> On Thu, Feb 04, 2016 at 03:53:20PM +0100, Andreas Hartmann wrote:
>> Hello!
>>
>> The following happens with Linux 4.4.1 during boot on an MSI A78M-E35
>> board. Additionally, I attached the complete dmesg.
> 
> Thanks a lot for the report!  I cc'd some folks who know more about
> this than I do.  Is this a regression?

Problem doesn't happen in 4.2 - I didn't test 4.3 because I actually
don't have a 4.3 kernel and Suravee Suthikulanit patchset fixes the
problem as I already wrote.

Therefore the problem could be there since 4.3 or maybe firstly at 4.4.


Regards,
Andreas
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