linux-kernel - [PATCH v2 2/3] vduse: enable Virtio-net device type

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Message-ID: <20230704164045.39119-3-maxime.coquelin@redhat.com>
Date:   Tue,  4 Jul 2023 18:40:44 +0200
From:   Maxime Coquelin <maxime.coquelin@...hat.com>
To:     xieyongji@...edance.com, jasowang@...hat.com, mst@...hat.com,
        david.marchand@...hat.com, lulu@...hat.com
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        xuanzhuo@...ux.alibaba.com, eperezma@...hat.com,
        Maxime Coquelin <maxime.coquelin@...hat.com>
Subject: [PATCH v2 2/3] vduse: enable Virtio-net device type

This patch adds Virtio-net device type to the supported
devices types. Initialization fails if the device does
not support VIRTIO_F_VERSION_1 feature, in order to
guarantee the configuration space is read-only.

Acked-by: Jason Wang <jasowang@...hat.com>
Reviewed-by: Xie Yongji <xieyongji@...edance.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@...hat.com>
---
 drivers/vdpa/vdpa_user/vduse_dev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index ff9fdd6783fe..1271c9796517 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -142,6 +142,7 @@ static struct workqueue_struct *vduse_irq_bound_wq;
 
 static u32 allowed_device_id[] = {
 	VIRTIO_ID_BLOCK,
+	VIRTIO_ID_NET,
 };
 
 static inline struct vduse_dev *vdpa_to_vduse(struct vdpa_device *vdpa)
@@ -1672,6 +1673,10 @@ static bool features_is_valid(struct vduse_dev_config *config)
 			(config->features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE)))
 		return false;
 
+	if ((config->device_id == VIRTIO_ID_NET) &&
+			!(config->features & (1ULL << VIRTIO_F_VERSION_1)))
+		return false;
+
 	return true;
 }
 
@@ -2027,6 +2032,7 @@ static const struct vdpa_mgmtdev_ops vdpa_dev_mgmtdev_ops = {
 
 static struct virtio_device_id id_table[] = {
 	{ VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
+	{ VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
 	{ 0 },
 };
 
-- 
2.41.0