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spapr: Forbid setting ic-mode for old machine types 

Machine types 3.0 and older only know about the legacy XICS backend.
Make it clear by erroring out if the user tries to set ic-mode on
such machines.

Signed-off-by: Greg Kurz <groug@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-01-17 12:06:38 +01:00 committed by David Gibson
parent 1ac24c91bb
commit 21df5e4ffa
1 changed files with 5 additions and 0 deletions
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5
hw/ppc/spapr.c
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@ -3127,6 +3127,11 @@ static void spapr_set_ic_mode(Object *obj, const char *value, Error **errp)
{
sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
error_setg(errp, "This machine only uses the legacy XICS backend, don't pass ic-mode");
return;
}
/* The legacy IRQ backend can not be set */
if (strcmp(value, "xics") == 0) {
spapr->irq = &spapr_irq_xics;