Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
To:     mst@redhat.com, Jason Wang <jasowang@redhat.com>
Cc:     Zhu Lingshan <lingshan.zhu@intel.com>,
        virtualization@lists.linux-foundation.org,
        "Gonglei (Arei)" <arei.gonglei@huawei.com>, longpeng2@huawei.com,
        Lei Yang <leiyang@redhat.com>,
        Parav Pandit <parav@mellanox.com>,
        Gautam Dawar <gdawar@xilinx.com>,
        Dragos Tatulea <dtatulea@nvidia.com>,
        Laurent Vivier <lvivier@redhat.com>, linux-api@vger.kernel.org,
        Liuxiangdong <liuxiangdong5@huawei.com>,
        linux-kernel@vger.kernel.org, alvaro.karsz@solid-run.com,
        Shannon Nelson <snelson@pensando.io>,
        Stefano Garzarella <sgarzare@redhat.com>,
        Cindy Lu <lulu@redhat.com>, si-wei.liu@oracle.com,
        Harpreet Singh Anand <hanand@xilinx.com>
Subject: [PATCH v2 4/4] vdpa_sim: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK
Date:   Fri,  9 Jun 2023 11:21:27 +0200
Message-Id: <20230609092127.170673-5-eperezma@redhat.com>
In-Reply-To: <20230609092127.170673-1-eperezma@redhat.com>
References: <20230609092127.170673-1-eperezma@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

Start offering the feature in the simulator.  Other parent drivers can
follow this code to offer it too.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Shannon Nelson <shannon.nelson@amd.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index d343af4fa60e..76d41058add9 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -18,6 +18,7 @@
 #include <linux/vdpa.h>
 #include <linux/vhost_iotlb.h>
 #include <uapi/linux/vdpa.h>
+#include <uapi/linux/vhost_types.h>
 
 #include "vdpa_sim.h"
 
@@ -410,6 +411,11 @@ static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
 	return vdpasim->dev_attr.supported_features;
 }
 
+static u64 vdpasim_get_backend_features(const struct vdpa_device *vdpa)
+{
+	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
+}
+
 static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
@@ -733,6 +739,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
 	.get_vq_align           = vdpasim_get_vq_align,
 	.get_vq_group           = vdpasim_get_vq_group,
 	.get_device_features    = vdpasim_get_device_features,
+	.get_backend_features   = vdpasim_get_backend_features,
 	.set_driver_features    = vdpasim_set_driver_features,
 	.get_driver_features    = vdpasim_get_driver_features,
 	.set_config_cb          = vdpasim_set_config_cb,
@@ -770,6 +777,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
 	.get_vq_align           = vdpasim_get_vq_align,
 	.get_vq_group           = vdpasim_get_vq_group,
 	.get_device_features    = vdpasim_get_device_features,
+	.get_backend_features   = vdpasim_get_backend_features,
 	.set_driver_features    = vdpasim_set_driver_features,
 	.get_driver_features    = vdpasim_get_driver_features,
 	.set_config_cb          = vdpasim_set_config_cb,
-- 
2.31.1