Dear Michael,
Thank you very much for your response.
Am 15.03.21 um 08:53 schrieb Michael Ellerman:
Paul Menzel writes:
On the POWER8 system IBM S822LC, Linux 5.12-rc2+ logs the errors below.
That's a bare metal system, you can see that from the line "Using
PowerNV machine description" in the boot log.
$ dmesg --level=err
[ 1.555668] Driver 'hvc_console' was unable to register with bus_type
'vio' because the bus was not initialized.
[ 1.558434] Driver 'tpm_ibmvtpm' was unable to register with bus_type
'vio' because the bus was not initialized.
$ grep VIO /boot/config-5.12.0-rc2+
CONFIG_IBMVIO=y
The "vio" bus is not a real bus, it's a fake bus we use for hypervisor
provided devices in LPARs (guests).
So on bare metal machines there is no vio bus, the devices that would
appear on the vio bus are found via other mechanisms.
Thank you for the explanation. Two questions:
1. Could a bare metal system be detected, and the VIO “be skipped”?
2. Should the log level be changed to notice or info then, as it’s an
expected failure?
[…]
Kind regards,
Paul
