linux-kernel - Re: [PATCH v7 7/8] iommu/vt-d: Add nested domain allocation

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Message-ID: <20231025114931.GY3952@nvidia.com>
Date:   Wed, 25 Oct 2023 08:49:31 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>
Cc:     "Liu, Yi L" <yi.l.liu@...el.com>,
        "joro@...tes.org" <joro@...tes.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "robin.murphy@....com" <robin.murphy@....com>,
        "baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "nicolinc@...dia.com" <nicolinc@...dia.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "mjrosato@...ux.ibm.com" <mjrosato@...ux.ibm.com>,
        "chao.p.peng@...ux.intel.com" <chao.p.peng@...ux.intel.com>,
        "yi.y.sun@...ux.intel.com" <yi.y.sun@...ux.intel.com>,
        "peterx@...hat.com" <peterx@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "shameerali.kolothum.thodi@...wei.com" 
        <shameerali.kolothum.thodi@...wei.com>,
        "lulu@...hat.com" <lulu@...hat.com>,
        "suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "Duan, Zhenzhong" <zhenzhong.duan@...el.com>,
        "Martins, Joao" <joao.m.martins@...cle.com>
Subject: Re: [PATCH v7 7/8] iommu/vt-d: Add nested domain allocation

On Wed, Oct 25, 2023 at 07:34:20AM +0000, Tian, Kevin wrote:
> > From: Jason Gunthorpe <jgg@...dia.com>
> > Sent: Wednesday, October 25, 2023 7:03 AM
> >
> > @@ -4849,6 +4855,7 @@ static void *intel_iommu_hw_info(struct device
> > *dev, u32 *length, u32 *type)
> >  	if (!vtd)
> >  		return ERR_PTR(-ENOMEM);
> > 
> > +	vtd->flags = IOMMU_HW_INFO_VTD_ERRATA_772415_SPR17;
> 
> this doesn't belong to this patch. otherwise looks good:

Ah.. It seems to be some artifact of how I make this diff, it is was
fine in the actual commit.

Thanks,
Jason