linux-kernel - `GHES: Failed to enable APEI firmware first mode.` on AMD board

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Date:   Sun, 23 Jan 2022 11:11:56 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <lenb@...nel.org>
Cc:     ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: `GHES: Failed to enable APEI firmware first mode.` on AMD board

Dear Linux folks,

On the ASUS F2A85-M PRO since at least Linux 4.14 (up to 5.17-rc1) I am 
getting the failure message (level info) below:

     [    2.054690] calling  ghes_init+0x0/0xee @ 1
     [    2.054918] GHES: Failed to enable APEI firmware first mode.
     [    2.054921] initcall ghes_init+0x0/0xee returned 0 after 220 usecs

I failed to trace the probe function `ghes_probe` although it’s listed 
under the available filter functions.

     $ sudo grep ghes_probe /sys/kernel/tracing/available_filter_functions
     ghes_probe

The trace of `ghes_init` is attached although it is probably useless as 
the question is why the probe function succeeds.

Kind regards,

Paul
View attachment "ghes_init_trace.txt" of type "text/plain" (59740 bytes)