linux-kernel - [PATCH v5 14/26] KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI

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Message-Id: <20171027142855.21584-15-marc.zyngier@arm.com>
Date:   Fri, 27 Oct 2017 15:28:43 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Christoffer Dall <christoffer.dall@...aro.org>,
        Eric Auger <eric.auger@...hat.com>,
        Shanker Donthineni <shankerd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        Shameerali Kolothum Thodi 
        <shameerali.kolothum.thodi@...wei.com>,
        Andre Przywara <Andre.Przywara@....com>,
        Christoffer Dall <cdall@...aro.org>
Subject: [PATCH v5 14/26] KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI

Handling CLEAR is pretty easy. Just ask the ITS driver to clear
the corresponding pending bit (which will turn into a CLEAR
command on the physical side).

Acked-by: Christoffer Dall <cdall@...aro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
---
 virt/kvm/arm/vgic/vgic-its.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 42ffb9084bb7..5778b50911e8 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -1070,6 +1070,10 @@ static int vgic_its_cmd_handle_clear(struct kvm *kvm, struct vgic_its *its,
 
 	ite->irq->pending_latch = false;
 
+	if (ite->irq->hw)
+		return irq_set_irqchip_state(ite->irq->host_irq,
+					     IRQCHIP_STATE_PENDING, false);
+
 	return 0;
 }
 
-- 
2.11.0