Hi,
> If you want to add hotplug to microvm, you can reuse the existing code
> for CPU and memory hotplug controllers, and write drivers for them in
> Linux's drivers/platform. The drivers would basically do what the ACPI
> AML tells the interpreter to do.
How would the linux kernel detect those devices?
I guess that wouldn't be ACPI, seems everyone wants avoid it[1].
So device tree on x86? Something else?
cheers,
Gerd
[1] Not clear to me why, some minimal ACPI tables listing our
devices (isa-serial, fw_cfg, ...) doesn't look unreasonable
to me. We could also make virtio-mmio discoverable that way.
Also we could do acpi cpu hotplug without having to write those
linux platform drivers. We would need a sysbus-acpi device though,
but given that most acpi code is already separated out so piix and
q35 can share it it should not be that hard to wire up.
