linux-kernel - RE: [PATCH v6 2/6] drm/i915/gvt: OpRegion support for GVT-g

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Message-ID: <DD379D741F77464281CE7ED1CD7C12DE70669308@SHSMSX101.ccr.corp.intel.com>
Date:   Wed, 31 May 2017 06:44:20 +0000
From:   "Chen, Xiaoguang" <xiaoguang.chen@...el.com>
To:     Zhenyu Wang <zhenyuw@...ux.intel.com>
CC:     "Tian, Kevin" <kevin.tian@...el.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "chris@...is-wilson.co.uk" <chris@...is-wilson.co.uk>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "kraxel@...hat.com" <kraxel@...hat.com>,
        "Niu, Bing" <bing.niu@...el.com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        "Wang, Zhi A" <zhi.a.wang@...el.com>,
        "Lv, Zhiyuan" <zhiyuan.lv@...el.com>
Subject: RE: [PATCH v6 2/6] drm/i915/gvt: OpRegion support for GVT-g



>-----Original Message-----
>From: Zhenyu Wang [mailto:zhenyuw@...ux.intel.com]
>Sent: Wednesday, May 31, 2017 2:30 PM
>To: Chen, Xiaoguang <xiaoguang.chen@...el.com>
>Cc: Tian, Kevin <kevin.tian@...el.com>; intel-gfx@...ts.freedesktop.org; linux-
>kernel@...r.kernel.org; chris@...is-wilson.co.uk; alex.williamson@...hat.com;
>kraxel@...hat.com; Niu, Bing <bing.niu@...el.com>; intel-gvt-
>dev@...ts.freedesktop.org; Wang, Zhi A <zhi.a.wang@...el.com>; Lv, Zhiyuan
><zhiyuan.lv@...el.com>
>Subject: Re: [PATCH v6 2/6] drm/i915/gvt: OpRegion support for GVT-g
>
>On 2017.05.31 06:22:28 +0000, Chen, Xiaoguang wrote:
>> >> @@ -467,6 +555,15 @@ static int intel_vgpu_create(struct kobject
>> >> *kobj,
>> >struct mdev_device *mdev)
>> >>  	vgpu->vdev.mdev = mdev;
>> >>  	mdev_set_drvdata(mdev, vgpu);
>> >>
>> >> +	ret = intel_vgpu_reg_init_opregion(vgpu);
>> >> +	if (ret) {
>> >> +		gvt_vgpu_err("create OpRegion failed\n");
>> >> +		goto out;
>> >> +	}
>> >
>> >Still need to handle error path for created vgpu.
>> Just checked the code, if initialize the opregion failed we should first release
>vfio/mdev releated work(maybe call intel_vgpu_release function)  and then
>destroy the vgpu. Will update in the next version.
>>
>
>Better to init opregion inside of create vgpu and do proper error handling there
>too.
Then we must add a new entry in intel_gvt_mpt interface something like "create_opregion".

>
>--
>Open Source Technology Center, Intel ltd.
>
>$gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827