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Tue, 22 Dec 2020 06:53:57 -0800 (PST) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, akpm@linux-foundation.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC v2 08/13] vdpa: Introduce process_iotlb_msg() in vdpa_config_ops Date: Tue, 22 Dec 2020 22:52:16 +0800 Message-Id: <20201222145221.711-9-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201222145221.711-1-xieyongji@bytedance.com> References: <20201222145221.711-1-xieyongji@bytedance.com> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch introduces a new method in the vdpa_config_ops to support processing the raw vhost memory mapping message in the vDPA device driver. Signed-off-by: Xie Yongji --- drivers/vhost/vdpa.c | 5 ++++- include/linux/vdpa.h | 7 +++++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 448be7875b6d..ccbb391e38be 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -728,6 +728,9 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, if (r) return r; + if (ops->process_iotlb_msg) + return ops->process_iotlb_msg(vdpa, msg); + switch (msg->type) { case VHOST_IOTLB_UPDATE: r = vhost_vdpa_process_iotlb_update(v, msg); @@ -770,7 +773,7 @@ static int vhost_vdpa_alloc_domain(struct vhost_vdpa *v) int ret; /* Device want to do DMA by itself */ - if (ops->set_map || ops->dma_map) + if (ops->set_map || ops->dma_map || ops->process_iotlb_msg) return 0; bus = dma_dev->bus; diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 656fe264234e..7bccedf22f4b 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -5,6 +5,7 @@ #include #include #include +#include #include #include @@ -172,6 +173,10 @@ struct vdpa_iova_range { * @vdev: vdpa device * Returns the iova range supported by * the device. + * @process_iotlb_msg: Process vhost memory mapping message (optional) + * Only used for VDUSE device now + * @vdev: vdpa device + * @msg: vhost memory mapping message * @set_map: Set device memory mapping (optional) * Needed for device that using device * specific DMA translation (on-chip IOMMU) @@ -240,6 +245,8 @@ struct vdpa_config_ops { struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev); /* DMA ops */ + int (*process_iotlb_msg)(struct vdpa_device *vdev, + struct vhost_iotlb_msg *msg); int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb); int (*dma_map)(struct vdpa_device *vdev, u64 iova, u64 size, u64 pa, u32 perm);