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vDPA: report virtio-block MQ info to user space

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

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-6-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2024-02-19 02:56:01 +08:00 committed by Michael S. Tsirkin
parent 81f64e1d91
commit 54fb04b02e
2 changed files with 17 additions and 0 deletions
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16
drivers/vdpa/vdpa.c
View file

@ -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;
}

1
include/uapi/linux/vdpa.h
View file

@ -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,