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

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Message-ID: <c3a8337b-5e38-d883-5ea7-375ff9209acf@linux.intel.com>
Date:   Tue, 24 Mar 2020 09:50:28 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:     baolu.lu@...ux.intel.com, 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>
Subject: Re: [PATCH V10 02/11] iommu/uapi: Define a mask for bind data

On 2020/3/24 3:37, Jacob Pan wrote:
> 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.
> 

I looked through this patch series. It looks good to me. I will do some
code style cleanup and take it to v5.7. I am not the right person to
decide whether include/uapi/linux/iommu.h is the right place for this,
so I will move it to Intel IOMMU driver for now.

Best regards,
baolu