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

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Date:   Wed, 2 Sep 2020 14:47:06 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Jacob Pan <jacob.pan.linux@...il.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        LKML <linux-kernel@...r.kernel.org>,
        iommu@...ts.linux-foundation.org, Wu Hao <hao.wu@...el.com>,
        David Woodhouse <dwmw2@...radead.org>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v2 3/9] iommu/ioasid: Introduce ioasid_set APIs

On Mon, 24 Aug 2020 11:34:29 -0700
Randy Dunlap <rdunlap@...radead.org> wrote:

> 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
> 
got it. thanks!

> >> + * @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;
> >>  };  
> 
> 

[Jacob Pan]