linux-kernel - Re: [PATCH v2 3/9] iommu/ioasid: Introduce ioasid

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Message-ID: <1be98989-fab3-f9e4-cbd6-cf72a67dc5f1@infradead.org>
Date:   Mon, 24 Aug 2020 11:34:29 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Jacob Pan <jacob.pan.linux@...il.com>
Cc:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Yi Liu <yi.l.liu@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        Eric Auger <eric.auger@...hat.com>, Wu Hao <hao.wu@...el.com>
Subject: Re: [PATCH v2 3/9] iommu/ioasid: Introduce ioasid_set APIs

On 8/24/20 11:28 AM, Jean-Philippe Brucker wrote:
>> +/**
>> + * struct ioasid_set - Meta data about ioasid_set
>> + * @type:	Token types and other features
> nit: doesn't follow struct order
> 
>> + * @token:	Unique to identify an IOASID set
>> + * @xa:		XArray to store ioasid_set private IDs, can be used for
>> + *		guest-host IOASID mapping, or just a private IOASID namespace.
>> + * @quota:	Max number of IOASIDs can be allocated within the set
>> + * @nr_ioasids	Number of IOASIDs currently allocated in the set

 * @nr_ioasids: Number of IOASIDs currently allocated in the set

>> + * @sid:	ID of the set
>> + * @ref:	Reference count of the users
>> + */
>>  struct ioasid_set {
>> -	int dummy;
>> +	void *token;
>> +	struct xarray xa;
>> +	int type;
>> +	int quota;
>> +	int nr_ioasids;
>> +	int sid;
>> +	refcount_t ref;
>> +	struct rcu_head rcu;
>>  };


-- 
~Randy