linux-kernel - Re: [PATCH V10 02/11] iommu/uapi: Define a mask for bind data

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Message-ID: <20200323123726.64974d83@jacob-builder>
Date:   Mon, 23 Mar 2020 12:37:26 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Yi Liu <yi.l.liu@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        Christoph Hellwig <hch@...radead.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Eric Auger <eric.auger@...hat.com>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH V10 02/11] iommu/uapi: Define a mask for bind data

On Sun, 22 Mar 2020 09:29:32 +0800
Lu Baolu <baolu.lu@...ux.intel.com> wrote:

> On 2020/3/21 7:27, Jacob Pan wrote:
> > Memory type related flags can be grouped together for one simple
> > check.
> > 
> > ---
> > v9 renamed from EMT to MTS since these are memory type support
> > flags. ---
> > 
> > Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> > ---
> >   include/uapi/linux/iommu.h | 5 ++++-
> >   1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
> > index 4ad3496e5c43..d7bcbc5f79b0 100644
> > --- a/include/uapi/linux/iommu.h
> > +++ b/include/uapi/linux/iommu.h
> > @@ -284,7 +284,10 @@ struct iommu_gpasid_bind_data_vtd {
> >   	__u32 pat;
> >   	__u32 emt;
> >   };
> > -
> > +#define IOMMU_SVA_VTD_GPASID_MTS_MASK
> > (IOMMU_SVA_VTD_GPASID_CD | \
> > +					 IOMMU_SVA_VTD_GPASID_EMTE
> > | \
> > +					 IOMMU_SVA_VTD_GPASID_PCD
> > |  \
> > +
> > IOMMU_SVA_VTD_GPASID_PWT)  
> 
> As name implies, can this move to intel-iommu.h?
> 
I also thought about this but the masks are in vendor specific part of
the UAPI.

> Best regards,
> baolu
> 
> >   /**
> >    * struct iommu_gpasid_bind_data - Information about device and
> > guest PASID binding
> >    * @version:	Version of this data structure
> >   

[Jacob Pan]