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Tsirkin " Cc: Cindy Lu , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Yongji Xie , Stefano Garzarella , virtualization@lists.linux.dev, Laurent Vivier , linux-kernel@vger.kernel.org, Xuan Zhuo , jasowang@redhat.com, Maxime Coquelin Subject: [RFC v2 6/7] vduse: send update_iotlb_v2 message Date: Thu, 7 Aug 2025 13:57:51 +0200 Message-ID: <20250807115752.1663383-7-eperezma@redhat.com> In-Reply-To: <20250807115752.1663383-1-eperezma@redhat.com> References: <20250807115752.1663383-1-eperezma@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 This message lets the kernel notify userspace VDUSE backends about updated IOTLB mappings for a specific ASID. Signed-off-by: Eugenio P=C3=A9rez --- drivers/vdpa/vdpa_user/vduse_dev.c | 14 ++++++++++---- include/uapi/linux/vduse.h | 7 +++++++ 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vd= use_dev.c index 145147c49930..ac7897068222 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -326,7 +326,7 @@ static int vduse_dev_set_status(struct vduse_dev *dev, = u8 status) return vduse_dev_msg_sync(dev, &msg); } =20 -static int vduse_dev_update_iotlb(struct vduse_dev *dev, +static int vduse_dev_update_iotlb(struct vduse_dev *dev, u32 asid, u64 start, u64 last) { struct vduse_dev_msg msg =3D { 0 }; @@ -335,8 +335,14 @@ static int vduse_dev_update_iotlb(struct vduse_dev *de= v, return -EINVAL; =20 msg.req.type =3D VDUSE_UPDATE_IOTLB; - msg.req.iova.start =3D start; - msg.req.iova.last =3D last; + if (dev->api_version < VDUSE_API_VERSION_1) { + msg.req.iova.start =3D start; + msg.req.iova.last =3D last; + } else { + msg.req.iova_v2.start =3D start; + msg.req.iova_v2.last =3D last; + msg.req.iova_v2.asid =3D asid; + } =20 return vduse_dev_msg_sync(dev, &msg); } @@ -882,7 +888,7 @@ static int vduse_vdpa_set_map(struct vdpa_device *vdpa, if (ret) return ret; =20 - ret =3D vduse_dev_update_iotlb(dev, 0ULL, ULLONG_MAX); + ret =3D vduse_dev_update_iotlb(dev, asid, 0ULL, ULLONG_MAX); if (ret) { vduse_domain_clear_map(dev->domain[asid], iotlb); return ret; diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h index d300fd5f867f..a5f7a5edb8e0 100644 --- a/include/uapi/linux/vduse.h +++ b/include/uapi/linux/vduse.h @@ -349,6 +349,12 @@ struct vduse_iova_range { __u64 last; }; =20 +struct vduse_iova_range_v2 { + __u64 start; + __u64 last; + __u32 asid; +}; + /** * struct vduse_dev_request - control request * @type: request type @@ -369,6 +375,7 @@ struct vduse_dev_request { struct vduse_vq_state vq_state; struct vduse_dev_status s; struct vduse_iova_range iova; + struct vduse_iova_range_v2 iova_v2; struct vduse_vq_group vq_group; /* Only if vduse api version >=3D 1 */ /* Only if vduse api version >=3D 1 */ struct vduse_vq_group_asid vq_group_asid; --=20 2.50.1