Boot CPU is assumed to always present in QEMU code, so untile that assumptions are gone, deny removal request, In another words QEMU won't support BSP hot-unplug.
Signed-off-by: Igor Mammedov <imamm...@redhat.com> --- v5: - s/1st CPU (BSP)/Boot CPU/ Eduardo Habkost <ehabk...@redhat.com> - intialize idx to -1 and assert on it, Eduardo Habkost <ehabk...@redhat.com> (note: that should nexer happen in current code as we don't have stray CPUs and most likely never will, but it doesn't hurt to cautios) --- hw/i386/pc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 110f1bf..e15fcc1 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1757,10 +1757,18 @@ out: static void pc_cpu_unplug_request_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { + int idx = -1; HotplugHandlerClass *hhc; Error *local_err = NULL; PCMachineState *pcms = PC_MACHINE(hotplug_dev); + pc_find_cpu_slot(pcms, CPU(dev), &idx); + assert(idx != -1); + if (idx == 0) { + error_setg(&local_err, "Boot CPU is unpluggable"); + goto out; + } + hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev); hhc->unplug_request(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err); -- 2.7.4