linux-kernel - [RFC PATCH 1/5] vsock/virtio: Extend virtio-vsock spec with an "order" field

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Date: Fri, 17 May 2024 22:46:03 +0800
From: Xuewei Niu <niuxuewei97@...il.com>
To: stefanha@...hat.com,
	sgarzare@...hat.com
Cc: mst@...hat.com,
	davem@...emloft.net,
	kvm@...r.kernel.org,
	virtualization@...ts.linux.dev,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Xuewei Niu <niuxuewei.nxw@...group.com>
Subject: [RFC PATCH 1/5] vsock/virtio: Extend virtio-vsock spec with an "order" field

The "order" field determines the location of the device in the linked list,
the device with CID 4, having a smallest order, is in the first place, and
so forth.

Rules:

* It doesn’t have to be continuous;
* It cannot exist conflicts;
* It is optional for the mode of a single device, but is required for the
  mode of multiple devices.

Signed-off-by: Xuewei Niu <niuxuewei.nxw@...group.com>
---
 include/uapi/linux/virtio_vsock.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/virtio_vsock.h b/include/uapi/linux/virtio_vsock.h
index 64738838bee5..b62ec7d2ab1e 100644
--- a/include/uapi/linux/virtio_vsock.h
+++ b/include/uapi/linux/virtio_vsock.h
@@ -43,6 +43,7 @@
 
 struct virtio_vsock_config {
 	__le64 guest_cid;
+	__le64 order;
 } __attribute__((packed));
 
 enum virtio_vsock_event_id {
-- 
2.34.1