Commit 54fb04b0 authored by Zhu Lingshan's avatar Zhu Lingshan Committed by Michael S. Tsirkin
Browse files

vDPA: report virtio-block MQ info to user space 



This commits allows vDPA reporting virtio-block multi-queue
configuration to user sapce.

Signed-off-by: default avatarZhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-6-lingshan.zhu@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 81f64e1d

drivers/vdpa/vdpa.c

+16 −0
Original line number Diff line number Diff line
@@ -999,6 +999,19 @@ vdpa_dev_blk_seg_max_config_fill(struct sk_buff *msg, u64 features, 
	return nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_SEG_MAX, val_u32);

}



static int vdpa_dev_blk_mq_config_fill(struct sk_buff *msg, u64 features,

				       const struct virtio_blk_config *config)

{

	u16 val_u16;



	if ((features & BIT_ULL(VIRTIO_BLK_F_MQ)) == 0)

		return 0;



	val_u16 = __virtio16_to_cpu(true, config->num_queues);



	return nla_put_u16(msg, VDPA_ATTR_DEV_BLK_CFG_NUM_QUEUES, val_u16);

}



static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,

				    struct sk_buff *msg)

{
@@ -1025,6 +1038,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, 
	if (vdpa_dev_blk_seg_max_config_fill(msg, features_device, &config))

		return -EMSGSIZE;



	if (vdpa_dev_blk_mq_config_fill(msg, features_device, &config))

		return -EMSGSIZE;



	return 0;

}

include/uapi/linux/vdpa.h

+1 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ enum vdpa_attr { 
	VDPA_ATTR_DEV_BLK_CFG_SEG_SIZE,		/* u32 */

	VDPA_ATTR_DEV_BLK_CFG_BLK_SIZE,		/* u32 */

	VDPA_ATTR_DEV_BLK_CFG_SEG_MAX,		/* u32 */

	VDPA_ATTR_DEV_BLK_CFG_NUM_QUEUES,	/* u16 */



	/* new attributes must be added above here */

	VDPA_ATTR_MAX,