Paul Menzel <pmen...@molgen.mpg.de> writes: > Dear Linux folks, > > > 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. > [ 1.555668] Driver 'hvc_console' was unable to register with bus_type > 'vio' because the bus was not initialized. > [ 1.555866] hvc0: raw protocol on /ibm,opal/consoles/serial@0 (boot > console) > [ 1.555875] hvc0: No interrupts property, using OPAL event You can see here that the hvc opal driver found the console, which is the bare metal equivalent of the hvc console (vio) driver. > [ 1.556205] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled > [ 1.558377] Non-volatile memory driver v1.3 > [ 1.558404] Linux agpgart interface v0.103 > [ 1.558434] Driver 'tpm_ibmvtpm' was unable to register with bus_type > 'vio' because the bus was not initialized. The ibmvtpm driver is a Virtual TPM driver, so it also isn't present on a bare metal system. I don't think that system has a TPM, but if it did you'd need the appropriate bare metal TPM driver to use it. cheers
