Well. Sure that actually works?

The pmtimer is used in case seabios runs on qemu and initializes the (virtual) acpi pci device.
I doubt this also happens when running as coreboot payload.

The TSC needs calibration, and seabios uses the PIT for that I think. Except when running virtualized on KVM, in that case (new enough) seabios can use kvmclock to figure the TSC
frequency.

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