linux-kernel - Re: [PATCH v3 05/16] iommu/vt-d: support flushing more TLB types

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Date:   Mon, 20 Nov 2017 10:40:19 -0800
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     "Lukoshkov, Maksim" <maksim.lukoshkov@...el.com>
Cc:     "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        "Lan, Tianyu" <tianyu.lan@...el.com>,
        Yi L <yi.l.liu@...ux.intel.com>,
        "Liu@...l.linuxfoundation.org" <Liu@...l.linuxfoundation.org>,
        Jean Delvare <khali@...ux-fr.org>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v3 05/16] iommu/vt-d: support flushing more TLB types

On Mon, 20 Nov 2017 14:20:31 +0000
"Lukoshkov, Maksim" <maksim.lukoshkov@...el.com> wrote:

> On 11/17/2017 18:55, Jacob Pan wrote:
> > +void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16
> > pfsid,
> > +			u16 qdep, u64 addr, unsigned mask)
> > +{
> > +	struct qi_desc desc;
> > +
> > +	pr_debug_ratelimited("%s: sid %d, pfsid %d, qdep %d, addr
> > %llx, mask %d\n",
> > +		__func__, sid, pfsid, qdep, addr, mask);
> >   	if (mask) {
> >   		BUG_ON(addr & ((1 << (VTD_PAGE_SHIFT + mask)) -
> > 1)); addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
> > @@ -1352,7 +1366,41 @@ void qi_flush_dev_iotlb(struct intel_iommu
> > *iommu, u16 sid, u16 qdep, qdep = 0;
> >   
> >   	desc.low = QI_DEV_IOTLB_SID(sid) |
> > QI_DEV_IOTLB_QDEP(qdep) |
> > -		   QI_DIOTLB_TYPE;
> > +		   QI_DIOTLB_TYPE | QI_DEV_IOTLB_SID(pfsid);  
> 
> QI_DEV_IOTLB_SID(pfsid) -> QI_DEV_EIOTLB_PFSID(pfsid)?
> 
good catch! thank you.
> > +
> > +	qi_submit_sync(&desc, iommu);
> > +}
> > +  
> 
> Regards,
> Maksim Lukoshkov

[Jacob Pan]