Re: [Qemu-devel] [PATCH] qemu: piix: PCI bridge ACPI hotplug support

[Laszlo Ersek <lersek@redhat.com>]

Sorry about replying to myself...

On 06/10/13 22:43, Laszlo Ersek wrote:

> It's not a design purity argument, just what's cheaper.

You probably consider SMBIOS/ACPI table generation "guest code" that has
no place in the machine emulator. You're likely willing to expose the
needed bits on a case-by-case basis, in their barest representation.

I must consider the entire stack, from the libvirt top, down to the
guest kernel or root shell, and see where it is cheapest to effect
changes. The higher I can hoist something the better.

Modulo, it depends on what element of the stack people think of as
central / indispensable -- that element should support the feature directly.

(Returning to my earlier example, it would be theoretically viable *I
guess* to equip libvirt to pre-format a Type 3 SMBIOS blob in a file,
and pass it with "-smbios file=...", but many people don't use libvirt.
It also might not apply to other emulators supported by libvirt.)

Thanks,
Laszlo