linux-kernel - Re: [PATCH 1/9] iommu/vt-d: Allow interrupts from the entire bus for aliased devices

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Message-ID: <20190205111939.6f91739e@jacob-builder>
Date:   Tue, 5 Feb 2019 11:19:39 -0800
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     Joerg Roedel <joro@...tes.org>, Allen Hubbe <allenbh@...il.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Serge Semin <fancer.lancer@...il.com>,
        Eric Pilmore <epilmore@...aio.com>,
        iommu@...ts.linux-foundation.org, linux-kselftest@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-ntb@...glegroups.com, David Woodhouse <dwmw2@...radead.org>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH 1/9] iommu/vt-d: Allow interrupts from the entire bus
 for aliased devices

On Fri, 1 Feb 2019 10:27:29 -0700
Logan Gunthorpe <logang@...tatee.com> wrote:

> On 2019-02-01 9:44 a.m., Joerg Roedel wrote:
> > On Thu, Jan 31, 2019 at 11:56:48AM -0700, Logan Gunthorpe wrote:  
> >> @@ -394,6 +402,10 @@ static int set_msi_sid(struct irte *irte,
> >> struct pci_dev *dev) set_irte_sid(irte, SVT_VERIFY_BUS, SQ_ALL_16,
> >>  			     PCI_DEVID(PCI_BUS_NUM(data.alias),
> >>  				       dev->bus->number));
I guess devfn can be removed also. but that is separate cleanup.
 
> >> +	else if (data.count >= 2 && data.busmatch_count ==
> >> data.count)
> >> +		set_irte_sid(irte, SVT_VERIFY_BUS, SQ_ALL_16,
> >> +			     PCI_DEVID(dev->bus->number,
> >> +				       dev->bus->number));  
> > 
> > The dev->bus->number argument for the devfn parameter of PCI_DEVID
> > is not needed, right?  
> 
> Oh, yes. I think you are right.
> 
> > Also, this requires at least a comment to document that special
> > case.  
> 
> I'll add a comment for v2.
> 
> Thanks for the review!
> 
> Logan
> _______________________________________________
> iommu mailing list
> iommu@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu

[Jacob Pan]

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