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

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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
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