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

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Date:   Fri, 16 Apr 2021 11:24:19 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Xie Yongji <xieyongji@...edance.com>, mst@...hat.com,
        stefanha@...hat.com, sgarzare@...hat.com, parav@...dia.com,
        hch@...radead.org, christian.brauner@...onical.com,
        rdunlap@...radead.org, willy@...radead.org,
        viro@...iv.linux.org.uk, axboe@...nel.dk, bcrl@...ck.org,
        corbet@....net, mika.penttila@...tfour.com,
        dan.carpenter@...cle.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v6 09/10] vduse: Introduce VDUSE - vDPA Device in
 Userspace


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.

Thanks