virtio-blk/virtio-scsi needs this API for retrieving vq's affinity.
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
drivers/virtio/virtio.c | 10 ++++++++++
include/linux/virtio.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 4b15c00c0a0a..ab593a8350d4 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -448,6 +448,16 @@ int virtio_device_restore(struct virtio_device *dev)
EXPORT_SYMBOL_GPL(virtio_device_restore);
#endif
+const struct cpumask *virtio_get_vq_affinity(struct virtio_device *dev,
+ int index)
+{
+ if (!dev->config->get_vq_affinity)
+ return NULL;
+
+ return dev->config->get_vq_affinity(dev, index);
+}
+EXPORT_SYMBOL_GPL(virtio_get_vq_affinity);
+
static int virtio_init(void)
{
if (bus_register(&virtio_bus) != 0)
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index b1894e0323fa..99fbba9981cc 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -139,6 +139,8 @@ int virtio_device_restore(struct virtio_device *dev);
#endif
size_t virtio_max_dma_size(struct virtio_device *vdev);
+const struct cpumask *virtio_get_vq_affinity(struct virtio_device *dev,
+ int index);
#define virtio_device_for_each_vq(vdev, vq) \
list_for_each_entry(vq, &vdev->vqs, list)
--
2.31.1
