qemuacpi

Qemu support for ACPI 2.0+

I'm learning x86-64 kernel, and moving from Windows to Linux.

My Qemu version is 4.2 and running in the following command:

qemu-system-x86_64 -machine q35 -cpu Broadwell -accel kvm Boot.disk

It seems the ACPI version of Qemu is 0 and is using RSDT instead of XSDT.

So how can I enable ACPI 2.0+ on 64 bit Qemu?

Thanks a lot!

Solution

  • I think you need to firstly check if ACPI 2.0 is available in the ROM. I recall that QEMU uses SeaBIOS which might be too old.

    Another option is to check "-acpitable" command line option. It can let QEMU to load additional ACPI table. So if BIOS does not have what you want, you could add it to the additional table.