On 2020/12/29 下午7:41, Eli Cohen wrote:

On Wed, Dec 16, 2020 at 02:48:08PM +0800, Jason Wang wrote:

quoted

This patch converts the vhost-vDPA device to support multiple IOTLBs
tagged via ASID via hlist. This will be used for supporting multiple
address spaces in the following patches.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
  drivers/vhost/vdpa.c | 106 ++++++++++++++++++++++++++++++++-----------
  1 file changed, 80 insertions(+), 26 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index feb6a58df22d..060d5b5b7e64 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c

@@ -33,13 +33,21 @@ enum {
  
  #define VHOST_VDPA_DEV_MAX (1U << MINORBITS)
  
+#define VHOST_VDPA_IOTLB_BUCKETS 16
+
+struct vhost_vdpa_as {
+	struct hlist_node hash_link;
+	struct vhost_iotlb iotlb;
+	u32 id;
+};
+
  struct vhost_vdpa {
  	struct vhost_dev vdev;
  	struct iommu_domain *domain;
  	struct vhost_virtqueue *vqs;
  	struct completion completion;
  	struct vdpa_device *vdpa;
-	struct vhost_iotlb *iotlb;
+	struct hlist_head as[VHOST_VDPA_IOTLB_BUCKETS];
  	struct device dev;
  	struct cdev cdev;
  	atomic_t opened;

@@ -49,12 +57,64 @@ struct vhost_vdpa {
  	struct eventfd_ctx *config_ctx;
  	int in_batch;
  	struct vdpa_iova_range range;
+	int used_as;

This is not really used. Not in this patch and later removed.

Right, will remove this.

Thanks