From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sun, 8 Oct 2017 15:16:09 +0100
Subject: irqchip/gic-v3-its: Make its_send_vinvall operate on a single ITS
Patch-mainline: v4.15-rc1
Git-commit: 40619a2ef69d5e183717d28e8c98a59319c78a4f
References: FATE#323954

Currently, its_send_vinvall 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 |   33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -987,18 +987,12 @@
 	raw_spin_unlock_irqrestore(&vmovp_lock, flags);
 }
 
-static void its_send_vinvall(struct its_vpe *vpe)
+static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe)
 {
 	struct its_cmd_desc desc;
-	struct its_node *its;
 
 	desc.its_vinvall_cmd.vpe = vpe;
-
-	list_for_each_entry(its, &its_nodes, entry) {
-		if (!its->is_v4)
-			continue;
-		its_send_single_vcommand(its, its_build_vinvall_cmd, &desc);
-	}
+	its_send_single_vcommand(its, its_build_vinvall_cmd, &desc);
 }
 
 /*
@@ -2488,6 +2482,18 @@
 	}
 }
 
+static void its_vpe_invall(struct its_vpe *vpe)
+{
+	struct its_node *its;
+
+	list_for_each_entry(its, &its_nodes, entry) {
+		if (!its->is_v4)
+			continue;
+
+		its_send_vinvall(its, vpe);
+	}
+}
+
 static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
 {
 	struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
@@ -2503,7 +2509,7 @@
 		return 0;
 
 	case INVALL_VPE:
-		its_send_vinvall(vpe);
+		its_vpe_invall(vpe);
 		return 0;
 
 	default:
@@ -2732,11 +2738,18 @@
 					struct irq_data *d)
 {
 	struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
+	struct its_node *its;
 
 	/* Map the VPE to the first possible CPU */
 	vpe->col_idx = cpumask_first(cpu_online_mask);
 	its_send_vmapp(vpe, true);
-	its_send_vinvall(vpe);
+
+	list_for_each_entry(its, &its_nodes, entry) {
+		if (!its->is_v4)
+			continue;
+
+		its_send_vinvall(its, vpe);
+	}
 }
 
 static void its_vpe_irq_domain_deactivate(struct irq_domain *domain,