Qemu support for ACPI 2.0+

Question

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!

Doesn't ACPI is part of firmware part of the virtual machine? Like BIOS or anything else you are using. — 0andriy, Feb 09 '20 at 20:39
@0andriy, So what you mean is Qemu does not support ACPI 2.0+?? Sorry for the lat reply, I was at work...... — Shore, Feb 10 '20 at 03:38

score 2 · Accepted Answer · answered Jul 19 '20 at 18:08

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.

Qemu support for ACPI 2.0+

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