powerpc/xics: Mark xics IPI interrupt as per-cpu

It is physically per-cpu, and we want the irq layer to treat it that way.
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/xics.c

@@ -556,11 +556,11 @@ static void xics_request_ipi(void)
 	 */
 	set_irq_handler(ipi, handle_percpu_irq);
 	if (firmware_has_feature(FW_FEATURE_LPAR))
-		rc = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
-				"IPI", NULL);
+		rc = request_irq(ipi, xics_ipi_action_lpar,
+				IRQF_DISABLED|IRQF_PERCPU, "IPI", NULL);
 	else
-		rc = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
-				"IPI", NULL);
+		rc = request_irq(ipi, xics_ipi_action_direct,
+				IRQF_DISABLED|IRQF_PERCPU, "IPI", NULL);
 	BUG_ON(rc);
 }