linux-kernel - Re: [PATCH v3 45/59] KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI

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Message-ID: <20170828181822.GF24649@cbox>
Date:   Mon, 28 Aug 2017 20:18:22 +0200
From:   Christoffer Dall <cdall@...aro.org>
To:     Marc Zyngier <marc.zyngier@....com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Eric Auger <eric.auger@...hat.com>,
        Shanker Donthineni <shankerd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        Shameerali Kolothum Thodi 
        <shameerali.kolothum.thodi@...wei.com>
Subject: Re: [PATCH v3 45/59] KVM: arm/arm64: GICv4: Handle CLEAR applied to
 a VLPI

On Mon, Jul 31, 2017 at 06:26:23PM +0100, Marc Zyngier wrote:
> 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).
> 
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>

Acked-by: Christoffer Dall <cdall@...aro.org>

> ---
>  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 aaad577ce328..2c065c970ba0 100644
> --- a/virt/kvm/arm/vgic/vgic-its.c
> +++ b/virt/kvm/arm/vgic/vgic-its.c
> @@ -1069,6 +1069,10 @@ 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
>