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List:       fwts-devel
Subject:    Re: [PATCH][V3] klog.json: add a "Unable ... IOMMU perf counter" message
From:       Paul Menzel <pmenzel () molgen ! mpg ! de>
Date:       2020-04-28 10:40:02
Message-ID: c9c76b40-1fee-db72-059c-3e9fc74e5fb8 () molgen ! mpg ! de
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Dear Alex,


Am 28.04.20 um 01:07 schrieb Alex Hung:
> This message shows performance counters are not supported on AMD IOMMU
> hardware.
> 
> More info @ https://lore.kernel.org/lkml/20180727102710.GA6738@8bytes.org/
> 
> Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
> Signed-off-by: Alex Hung <alex.hung@canonical.com>
> ---
> 
> [V2] update advise and commit comments
> [V3] change spec -> specifications
> 
> data/klog.json | 7 +++++++
> 1 file changed, 7 insertions(+)
> 
> diff --git a/data/klog.json b/data/klog.json
> index 15043658..cdb93554 100644
> --- a/data/klog.json
> +++ b/data/klog.json
> @@ -2697,6 +2697,13 @@ atform Communications Channel Table (PCCT) and find the PCC \
> subspace communicati "advice": "BIOS setup is configured to enable IOMMU, but BIOS \
> lacks IVRS table that is describing which is the address of IOMMU", "label": \
> "KlogAmdIommuNoIVRS" },
> +  {
> +    "compare_mode": "string",
> +    "log_level": "LOG_LEVEL_MEDIUM",
> +    "pattern": "Unable to read/write to IOMMU perf counter",
> +    "advice": "AMD IOMMU performance counter is inaccessible and public \
> specifications do not have information on how it should be not supported",

Is the last negation correct?

> +    "label": "KlogAmdIommuPCNotSupported"
> +  },
> {
> "compare_mode": "string",
> "log_level": "LOG_LEVEL_HIGH",
> 


Kind regards,

Paul

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