linux-kernel - RE: [v6 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel iommu

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Message-ID: <E959C4978C3B6342920538CF579893F002546B1B@SHSMSX104.ccr.corp.intel.com>
Date:	Fri, 22 May 2015 01:03:17 +0000
From:	"Wu, Feng" <feng.wu@...el.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	"joro@...tes.org" <joro@...tes.org>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"jiang.liu@...ux.intel.com" <jiang.liu@...ux.intel.com>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Wu, Feng" <feng.wu@...el.com>
Subject: RE: [v6 6/8] iommu, x86: Setup Posted-Interrupts capability for
 Intel iommu



> -----Original Message-----
> From: Thomas Gleixner [mailto:tglx@...utronix.de]
> Sent: Thursday, May 21, 2015 6:51 PM
> To: Wu, Feng
> Cc: joro@...tes.org; dwmw2@...radead.org; jiang.liu@...ux.intel.com;
> iommu@...ts.linux-foundation.org; linux-kernel@...r.kernel.org
> Subject: Re: [v6 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel
> iommu
> 
> On Thu, 21 May 2015, Feng Wu wrote:
> > @@ -647,6 +647,20 @@ static int __init intel_enable_irq_remapping(void)
> > +	/*
> > +	 * Set Posted-Interrupts capability.
> > +	 */
> > +	if (!disable_irq_post) {
> > +		intel_irq_remap_ops.capability |= 1 << IRQ_POSTING_CAP;
> > +
> > +		for_each_iommu(iommu, drhd)
> > +			if (!cap_pi_support(iommu->cap)) {
> > +				intel_irq_remap_ops.capability &=
> > +						~(1 << IRQ_POSTING_CAP);
> > +				break;
> > +			}
> > +	}
> > +
> 
> > @@ -874,6 +894,20 @@ static int reenable_irq_remapping(int eim)
> > +	/*
> > +	 * Set Posted-Interrupts capability.
> > +	 */
> > +	if (!disable_irq_post) {
> > +		intel_irq_remap_ops.capability |= 1 << IRQ_POSTING_CAP;
> > +
> > +		for_each_iommu(iommu, drhd)
> > +			if (!cap_pi_support(iommu->cap)) {
> > +				intel_irq_remap_ops.capability &=
> > +						~(1 << IRQ_POSTING_CAP);
> > +				break;
> > +			}
> > +	}
> > +
> 
> Verbatim copy and paste. Ever heard about the concept of helper functions?

Good idea!

Thanks,
Feng

> 
> Thanks,
> 
> 	tglx
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