On Fri, Jul 27, 2018 at 11:18:56AM +0200, Paul Menzel wrote:
> On the AMD site [1] I see the three family 0x17 documents below.
>
> 1. Open-Source Register Reference for AMD Family 17h Processors (PUB)
> 2. Processor Programming Reference (PPR) for AMD Family 17h Models 00h-0Fh
> Processors (PU
Dear Jörg,
On 07/27/18 10:27, Jörg Rödel wrote:
> On Mon, Jul 23, 2018 at 12:09:37PM +0200, Paul Menzel wrote:
>>> or the BIOS did not enable the performance counter feature in the IOMMU
>>> hardware.
>>
>> Is it possible to check that from the OS side?
>
> It would be if we had the NB document
Hi Paul,
On Mon, Jul 23, 2018 at 12:09:37PM +0200, Paul Menzel wrote:
> > or the BIOS did not enable the performance counter feature in the IOMMU
> > hardware.
>
> Is it possible to check that from the OS side?
It would be if we had the NB documentation, but I guess those details
are not publicl
Dear Jörg,
On 07/20/18 14:31, Jörg Rödel wrote:
> On Tue, Jul 17, 2018 at 06:02:07PM +0200, Paul Menzel wrote:
>> $ dmesg
>> […]
>> [0.145696] calling pci_iommu_init+0x0/0x3f @ 1
>> [0.145719] AMD-Vi: Unable to write to IOMMU perf counter.
>
> This is likely a firmware issue. Either th
Hi Paul,
On Tue, Jul 17, 2018 at 06:02:07PM +0200, Paul Menzel wrote:
> $ dmesg
> […]
> [0.145696] calling pci_iommu_init+0x0/0x3f @ 1
> [0.145719] AMD-Vi: Unable to write to IOMMU perf counter.
This is likely a firmware issue. Either the IVRS ACPI table is incorrect
or the BIOS did not
