From: Marc Zyngier <marc.zyngier@arm.com>
Date: Tue, 20 Dec 2016 15:31:02 +0000 (+0000)
Subject: irqchip/gic-v4: Add VPE command interface
X-Git-Tag: v4.14-rc1~159^2^2~16
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eab84318c2811e3f38c080efcc7f709f51bb8370;p=platform%2Fkernel%2Flinux-rpi.git

irqchip/gic-v4: Add VPE command interface

Add the required interfaces to schedule a VPE and perform a
VINVALL command.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---

diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index 3d4bede..d3f8b7a 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -72,3 +72,28 @@ void its_free_vcpu_irqs(struct its_vm *vm)
 	irq_domain_remove(vm->domain);
 	irq_domain_free_fwnode(vm->fwnode);
 }
+
+static int its_send_vpe_cmd(struct its_vpe *vpe, struct its_cmd_info *info)
+{
+	return irq_set_vcpu_affinity(vpe->irq, info);
+}
+
+int its_schedule_vpe(struct its_vpe *vpe, bool on)
+{
+	struct its_cmd_info info;
+
+	WARN_ON(preemptible());
+
+	info.cmd_type = on ? SCHEDULE_VPE : DESCHEDULE_VPE;
+
+	return its_send_vpe_cmd(vpe, &info);
+}
+
+int its_invall_vpe(struct its_vpe *vpe)
+{
+	struct its_cmd_info info = {
+		.cmd_type = INVALL_VPE,
+	};
+
+	return its_send_vpe_cmd(vpe, &info);
+}
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 3dc811d..6450f3e 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -93,5 +93,7 @@ struct its_cmd_info {
 
 int its_alloc_vcpu_irqs(struct its_vm *vm);
 void its_free_vcpu_irqs(struct its_vm *vm);
+int its_schedule_vpe(struct its_vpe *vpe, bool on);
+int its_invall_vpe(struct its_vpe *vpe);
 
 #endif