linux-kernel - Re: [PATCH v6 02/10] iommu/vt-d: Add custom allocator for IOASID

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Date:   Fri, 25 Oct 2019 09:44:02 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:     baolu.lu@...ux.intel.com, "Raj, Ashok" <ashok.raj@...el.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>,
        Christoph Hellwig <hch@...radead.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Eric Auger <eric.auger@...hat.com>
Subject: Re: [PATCH v6 02/10] iommu/vt-d: Add custom allocator for IOASID

Hi,

On 10/24/19 7:01 AM, Jacob Pan wrote:
> On Wed, 23 Oct 2019 10:21:51 +0800
> Lu Baolu <baolu.lu@...ux.intel.com> wrote:
> 
>>>> +#ifdef CONFIG_INTEL_IOMMU_SVM
>>>
>>> Maybe move them to intel-svm.c instead? that's where the bulk
>>> of the svm support is?
>>
>> I think this is a generic PASID allocator for guest IOMMU although
>> vSVA is currently the only consumer. Instead of making it SVM
>> specific, I'd like to suggest moving it to intel-pasid.c and replace
>> the @svm parameter with a void * one in intel_ioasid_free().
> 
> make sense to use void*, no need to tie that to svm bind data type.
> 
> In terms of location, perhaps we can move if we have more consumers of
> custom allocator?
> 

Make sense to me.

Best regards,
baolu