linux-kernel - [RFC 15/17] KVM: arm/arm64: implement IRQ bypass consumer functions

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Date:	Thu,  2 Jul 2015 15:17:25 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, christoffer.dall@...aro.org,
	marc.zyngier@....com, alex.williamson@...hat.com,
	pbonzini@...hat.com, avi.kivity@...il.com, mtosatti@...hat.com,
	feng.wu@...el.com, joro@...tes.org, b.reynal@...tualopensystems.com
Cc:	linux-kernel@...r.kernel.org, patches@...aro.org
Subject: [RFC 15/17] KVM: arm/arm64: implement IRQ bypass consumer functions

- kvm_arch_add_producer: perform VGIC/irqchip settings for forwarding
- kvm_arch_del_producer: same for inverse operation
- kvm_arch_stop_consumer: halt guest execution
- kvm_arch_resume_consumer resume guest execution

Signed-off-by: Eric Auger <eric.auger@...aro.org>
---
 arch/arm/kvm/arm.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 4be6715..f9b9b1e 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -1146,6 +1146,28 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
 	return NULL;
 }
 
+void kvm_arch_add_producer(struct irq_bypass_consumer *cons,
+			   struct irq_bypass_producer *prod)
+{
+	kvm_vgic_set_forward(cons->kvm, prod->irq, cons->gsi);
+}
+void kvm_arch_del_producer(struct irq_bypass_consumer *cons,
+			   struct irq_bypass_producer *prod)
+{
+	kvm_vgic_unset_forward(cons->kvm, prod->irq, cons->gsi,
+			       &prod->active);
+}
+
+void kvm_arch_stop_consumer(struct irq_bypass_consumer *cons)
+{
+	kvm_arm_halt_guest(cons->kvm);
+}
+
+void kvm_arch_resume_consumer(struct irq_bypass_consumer *cons)
+{
+	kvm_arm_resume_guest(cons->kvm);
+}
+
 /**
  * Initialize Hyp-mode and memory mappings on all CPUs.
  */
-- 
1.9.1

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