netdev - Re: Re: [PATCH v6 09/10] vduse: Introduce VDUSE

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Message-ID: <CACycT3vn6PaYGjjd2Uq5ot_YCbyvMzoeU8V_KgGN+cTFx7pg-Q@mail.gmail.com>
Date:   Fri, 16 Apr 2021 16:43:33 +0800
From:   Yongji Xie <xieyongji@...edance.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Parav Pandit <parav@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Christian Brauner <christian.brauner@...onical.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>, viro@...iv.linux.org.uk,
        Jens Axboe <axboe@...nel.dk>, bcrl@...ck.org,
        Jonathan Corbet <corbet@....net>,
        Mika Penttilä <mika.penttila@...tfour.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: Re: [PATCH v6 09/10] vduse: Introduce VDUSE - vDPA Device in Userspace

On Fri, Apr 16, 2021 at 11:24 AM Jason Wang <jasowang@...hat.com> wrote:
>
>
> 在 2021/3/31 下午4:05, Xie Yongji 写道:
> > +     }
> > +     case VDUSE_INJECT_VQ_IRQ:
> > +             ret = -EINVAL;
> > +             if (arg >= dev->vq_num)
> > +                     break;
> > +
> > +             ret = 0;
> > +             queue_work(vduse_irq_wq, &dev->vqs[arg].inject);
> > +             break;
>
>
> One additional note:
>
> Please use array_index_nospec() for all vqs[idx] access where idx is
> under the control of userspace to avoid potential spectre exploitation.
>

OK, I see.

Thanks,
Yongji