vdpa: support exposing the config size to userspace

- GET_CONFIG_SIZE: return the size of the virtio config space. The size contains the fields which are conditional on feature bits.

Longpeng committed 4 years ago

Commit a61280d1 parent f1781be3 files · +23 −1Browse files

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@@ -150,4 +150,8 @@ · 149 unmodified lines
150	150	/* Get the valid iova range */
151	151	#define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \
152	152	struct vhost_vdpa_iova_range)
	153	+
	154	+/* Get the config size */
	155	+#define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
	156	+
153	157	#endif