diff options
| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2023-06-06 14:04:23 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-06-08 22:39:03 +0100 |
| commit | 3a70ab1e7bb3b0ec773fcc95020bf95cab763fdf (patch) | |
| tree | adc0aaf19ec48ee94f1417ea1fa046db5addaa3a | |
| parent | 33e026a78c9f6760bf809d5b01369aaed2f627ee (diff) | |
| download | kvmtool-3a70ab1e7bb3b0ec773fcc95020bf95cab763fdf.tar.gz | |
virtio/net: Warn about enabling multiqueue with vhost
vhost-net requires to open one file descriptor for each TX/RX queue
pair. At the moment kvmtool does not support multi-queue vhost: it
issues all vhost ioctls on the first pair, and the other pairs are
broken. Refuse the enable vhost when the user asks for multi-queue.
Using multi-queue vhost-net also requires creating the tap interface
with the 'multi_queue' parameter.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20230606130426.978945-15-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | virtio/net.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/virtio/net.c b/virtio/net.c index c4d20f22..02667176 100644 --- a/virtio/net.c +++ b/virtio/net.c @@ -741,6 +741,11 @@ static struct virtio_ops net_dev_virtio_ops = { static void virtio_net__vhost_init(struct kvm *kvm, struct net_dev *ndev) { + if (ndev->queue_pairs > 1) { + pr_warning("multiqueue is not supported with vhost yet"); + return; + } + ndev->vhost_fd = open("/dev/vhost-net", O_RDWR); if (ndev->vhost_fd < 0) die_perror("Failed openning vhost-net device"); |