Date: Wed, 23 Dec 2015 18:21:39 +0100
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
To: Feng Wu <feng.wu@intel.com>
Cc: pbonzini@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/2] KVM: x86: Add lowest-priority support for vt-d
 posted-interrupts
Message-ID: <20151223172138.GC19037@potion.brq.redhat.com>
References: <1450229853-3886-1-git-send-email-feng.wu@intel.com>
 <1450229853-3886-3-git-send-email-feng.wu@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1450229853-3886-3-git-send-email-feng.wu@intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1045
Lines: 32

2015-12-16 09:37+0800, Feng Wu:
> Use vector-hashing to deliver lowest-priority interrupts for
> VT-d posted-interrupts.
> 
> Signed-off-by: Feng Wu <feng.wu@intel.com>
> ---
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> @@ -10702,8 +10702,16 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
>  		 */
>  
>  		kvm_set_msi_irq(e, &irq);
> -		if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
> -			continue;
> +
> +		if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
> +			if (!kvm_vector_hashing_enabled() ||
> +					irq.delivery_mode != APIC_DM_LOWEST)

Hm, wouldn't it actually be easier to extend kvm_intr_is_single_vcpu()
with vector hashing? :)

> +				continue;
> +
> +			vcpu = kvm_intr_vector_hashing_dest(kvm, &irq);
> +			if (!vcpu)
> +				continue;
> +		}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/