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

[Suravee Suthikulanit <suravee.suthikulpanit@amd.com>]

On 2/4/2016 11:53 AM, Andreas Hartmann wrote:
> On 02/04/2016 at 04:47 PM, Suravee Suthikulanit wrote:
>> Hi Andreas,
>>
>> On 2/4/2016 8:53 AM, 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.
>>
>> I was working on upstreaming changes to the AMD IOMMU Perf to fix some
>> of the similar issue I saw on a different platform.  Would you please
>> check to see if this patch series would fix this?
>>
>> https://lkml.org/lkml/2016/1/1/141
>
>
> This patchset seems to fix the problem.
>
> [    1.264639] AMD-Vi: IOMMU performance counters supported
>
> But there seems to be a problem with the location of
> perf_event_amd_iommu.h in the patch - I had to fix the complete
> perf_event_amd_iommu.h related patches to get them applied to 4.4. and
> finally compiled.
>
>
> Thanks,
> Andreas
>

Ok, I'll clean up and resend this patch series. Thanks for testing.

Thanks,
Suravee