From: "zhunxun@gmail.com" <zhunxun@gmail.com>
To: qemu <qemu-devel@nongnu.org>
Subject: [Qemu-devel] virtIO question
Date: Mon, 14 Nov 2016 20:36:39 +0800 [thread overview]
Message-ID: <2016111420363473644619@gmail.com> (raw)
I have a question about qemu.is it a bug in qemu version 1.2?
in qemu version 1.2 ,it set avail event by the code :
if (vq->vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(vq, vring_avail_idx(vq));
}
and in version 2.7 the code is
if (virtio_vdev_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) {
vring_set_avail_event(vq, vq->last_avail_idx);
}
a big difference of this is the value.vring_avail_idx(vq)is the latest value of VRingAvail.idx,and vq->last_avail_idx is not, I think it really different with the two different values,and I think the later is right,is it??
thanks a lot!!
zhunxun@gmail.com
next reply other threads:[~2016-11-14 12:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-14 12:36 zhunxun [this message]
2016-11-14 16:36 ` [Qemu-devel] virtIO question Stefan Hajnoczi
-- strict thread matches above, loose matches on Subject: below --
2016-11-11 14:17 jack
2016-11-05 15:23 jack
2016-11-05 10:50 zhunxun
2016-11-05 14:46 ` jitendra kumar khasdev
2016-11-05 15:04 ` Peter Maydell
2016-11-05 15:11 ` jitendra kumar khasdev
2016-11-09 10:58 ` zhunxun
2016-11-10 10:32 ` Stefan Hajnoczi
2016-11-10 12:16 ` zhunxun
2016-11-11 12:03 ` Stefan Hajnoczi
2016-11-12 8:43 ` zhunxun
2016-11-14 14:06 ` Stefan Hajnoczi
2016-11-14 7:14 ` zhunxun
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