drivers/hv/channel.c

27  * hv_gpadl_size - Return the real size of a gpadl, the size that Hyper-V uses
29  * For BUFFER gpadl, Hyper-V uses the exact same size as the guest does.
31  * For RING gpadl, in each ring, the guest uses one PAGE_SIZE as the header
35  * ringbuffer, the total size for a RING gpadl that Hyper-V uses is the
62  *                                 HV_HYP_PAGE) in a ring gpadl based on the
72 	 * For RING gpadl, in each ring, the guest uses one PAGE_SIZE as the
77 	 * And to calculate the effective send offset in gpadl, we need to
85  *                  the gpadl
87  * @type: the type of the gpadl
88  * @kbuffer: the pointer to the gpadl in the guest
89  * @size: the total size (in bytes) of the gpadl
309  * create_gpadl_header - Creates a gpadl for the specified buffer
420  *              should be 0 for BUFFER type gpadl
426 				   struct vmbus_gpadl *gpadl)
442 		gpadl->decrypted = false;
452 	gpadl->decrypted = true;
468 	gpadlmsg->gpadl = next_gpadl_handle;
497 		gpadl_body->gpadl = next_gpadl_handle;
524 	/* At this point, we received the gpadl created msg */
525 	gpadl->gpadl_handle = gpadlmsg->gpadl;
526 	gpadl->buffer = kbuffer;
527 	gpadl->size = size;
548 			gpadl->decrypted = false;
563 			  u32 size, struct vmbus_gpadl *gpadl)
566 				       0U, gpadl);
667 	/* Establish the gpadl for the ring buffer */
809 int vmbus_teardown_gpadl(struct vmbus_channel *channel, struct vmbus_gpadl *gpadl)
828 	msg->gpadl = gpadl->gpadl_handle;
848 	gpadl->gpadl_handle = 0;
865 	ret = set_memory_encrypted((unsigned long)gpadl->buffer,
866 				   PFN_UP(gpadl->size));
870 	gpadl->decrypted = ret;
945 	/* Tear down the gpadl for the channel's ring buffer */
949 			pr_err("Close failed: teardown gpadl return %d\n", ret);
951 			 * If we failed to teardown gpadl,