Commit e47be840 authored by Wu Zongyong's avatar Wu Zongyong Committed by Michael S. Tsirkin
Browse files

vdpa: add new attribute VDPA_ATTR_DEV_MIN_VQ_SIZE 



This attribute advertises the min value of virtqueue size. The value is
1 by default.

Signed-off-by: default avatarWu Zongyong <wuzongyong@linux.alibaba.com>
Link: https://lore.kernel.org/r/2bbc417355c4d22298050b1ba887cecfbde3e85d.1635493219.git.wuzongyong@linux.alibaba.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 30a03dfc

drivers/vdpa/vdpa.c

+5 −0
Original line number Diff line number Diff line
@@ -500,6 +500,7 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq 
	      int flags, struct netlink_ext_ack *extack)

{

	u16 max_vq_size;

	u16 min_vq_size = 1;

	u32 device_id;

	u32 vendor_id;

	void *hdr;
@@ -516,6 +517,8 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq 
	device_id = vdev->config->get_device_id(vdev);

	vendor_id = vdev->config->get_vendor_id(vdev);

	max_vq_size = vdev->config->get_vq_num_max(vdev);

	if (vdev->config->get_vq_num_min)

		min_vq_size = vdev->config->get_vq_num_min(vdev);



	err = -EMSGSIZE;

	if (nla_put_string(msg, VDPA_ATTR_DEV_NAME, dev_name(&vdev->dev)))
@@ -528,6 +531,8 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq 
		goto msg_err;

	if (nla_put_u16(msg, VDPA_ATTR_DEV_MAX_VQ_SIZE, max_vq_size))

		goto msg_err;

	if (nla_put_u16(msg, VDPA_ATTR_DEV_MIN_VQ_SIZE, min_vq_size))

		goto msg_err;



	genlmsg_end(msg, hdr);

	return 0;

include/uapi/linux/vdpa.h

+1 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ enum vdpa_attr { 
	VDPA_ATTR_DEV_VENDOR_ID,		/* u32 */

	VDPA_ATTR_DEV_MAX_VQS,			/* u32 */

	VDPA_ATTR_DEV_MAX_VQ_SIZE,		/* u16 */

	VDPA_ATTR_DEV_MIN_VQ_SIZE,		/* u16 */



	/* new attributes must be added above here */

	VDPA_ATTR_MAX,