linux-kernel - [PATCH v2 4/5] vduse: advertise API V2 support

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Message-ID: <20260210082554.1582553-5-eperezma@redhat.com>
Date: Tue, 10 Feb 2026 09:25:53 +0100
From: Eugenio Pérez <eperezma@...hat.com>
To: "Michael S . Tsirkin" <mst@...hat.com>
Cc: Cindy Lu <lulu@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Laurent Vivier <lvivier@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Maxime Coquelin <mcoqueli@...hat.com>,
	linux-kernel@...r.kernel.org,
	Yongji Xie <xieyongji@...edance.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	Stefano Garzarella <sgarzare@...hat.com>,
	virtualization@...ts.linux.dev
Subject: [PATCH v2 4/5] vduse: advertise API V2 support

Advertise VDUSE API V2 support to userspace.

With the necessary infrastructure and feature flags in place, VDUSE
devices can now opt-in to the new API and utilize the
VDUSE_F_QUEUE_READY feature.

Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
---
 drivers/vdpa/vdpa_user/vduse_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 7458cbaed4c7..39e115b8bf44 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -2168,7 +2168,7 @@ static long vduse_ioctl(struct file *file, unsigned int cmd,
 	switch (cmd) {
 	case VDUSE_GET_API_VERSION:
 		if (control->api_version == VDUSE_API_VERSION_NOT_ASKED)
-			control->api_version = VDUSE_API_VERSION_1;
+			control->api_version = VDUSE_API_VERSION_2;
 		ret = put_user(control->api_version, (u64 __user *)argp);
 		break;
 	case VDUSE_SET_API_VERSION: {
@@ -2179,7 +2179,7 @@ static long vduse_ioctl(struct file *file, unsigned int cmd,
 			break;
 
 		ret = -EINVAL;
-		if (api_version > VDUSE_API_VERSION_1)
+		if (api_version > VDUSE_API_VERSION_2)
 			break;
 
 		ret = 0;
-- 
2.53.0