From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sun, 8 Oct 2017 18:46:39 +0100
Subject: irqchip/gic-v3-its: Make its_send_vmapp operate on a single ITS
Patch-mainline: v4.15-rc1
Git-commit: 75fd951be846a494b0f01f80e859dcb74970f0d5
References: FATE#323954

Currently, its_send_vmapp operates on all ITSs. As we're about
to try and limit the amount of commands we send to ITSs that are
not involved in dealing with a given VM, let's redefine that
primitive so that it takes a target ITS as a parameter.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Alexander Graf <agraf@suse.de>
---
 drivers/irqchip/irq-gic-v3-its.c |   23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -928,21 +928,16 @@
 	its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc);
 }
 
-static void its_send_vmapp(struct its_vpe *vpe, bool valid)
+static void its_send_vmapp(struct its_node *its,
+			   struct its_vpe *vpe, bool valid)
 {
 	struct its_cmd_desc desc;
-	struct its_node *its;
 
 	desc.its_vmapp_cmd.vpe = vpe;
 	desc.its_vmapp_cmd.valid = valid;
+	desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx];
 
-	list_for_each_entry(its, &its_nodes, entry) {
-		if (!its->is_v4)
-			continue;
-
-		desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx];
-		its_send_single_vcommand(its, its_build_vmapp_cmd, &desc);
-	}
+	its_send_single_vcommand(its, its_build_vmapp_cmd, &desc);
 }
 
 static void its_send_vmovp(struct its_vpe *vpe)
@@ -2742,12 +2737,12 @@
 
 	/* Map the VPE to the first possible CPU */
 	vpe->col_idx = cpumask_first(cpu_online_mask);
-	its_send_vmapp(vpe, true);
 
 	list_for_each_entry(its, &its_nodes, entry) {
 		if (!its->is_v4)
 			continue;
 
+		its_send_vmapp(its, vpe, true);
 		its_send_vinvall(its, vpe);
 	}
 }
@@ -2756,8 +2751,14 @@
 					  struct irq_data *d)
 {
 	struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
+	struct its_node *its;
+
+	list_for_each_entry(its, &its_nodes, entry) {
+		if (!its->is_v4)
+			continue;
 
-	its_send_vmapp(vpe, false);
+		its_send_vmapp(its, vpe, false);
+	}
 }
 
 static const struct irq_domain_ops its_vpe_domain_ops = {