[dpdk-dev] [PATCH v2 3/5] vhost: prepare memory regions addresses

[Marvin Liu]

Prepare memory regions guest physical addresses for vectorized data
path. These information will be utilized by SIMD instructions to find
matched region index.

Signed-off-by: Marvin Liu <yong....@intel.com>

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 5a5c945551..4a81f18f01 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -52,6 +52,8 @@
 
 #define ASYNC_MAX_POLL_SEG 255
 
+#define MAX_NREGIONS 8
+
 #define VHOST_MAX_ASYNC_IT (MAX_PKT_BURST * 2)
 #define VHOST_MAX_ASYNC_VEC (BUF_VECTOR_MAX * 2)
 
@@ -375,6 +377,8 @@ struct inflight_mem_info {
 struct virtio_net {
        /* Frontend (QEMU) memory and memory region information */
        struct rte_vhost_memory *mem;
+       uint64_t                regions_low_addrs[MAX_NREGIONS];
+       uint64_t                regions_high_addrs[MAX_NREGIONS];
        uint64_t                features;
        uint64_t                protocol_features;
        int                     vid;
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index c3c924faec..89e75e9e71 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1291,6 +1291,17 @@ vhost_user_set_mem_table(struct virtio_net **pdev, 
struct VhostUserMsg *msg,
                }
        }
 
+       RTE_BUILD_BUG_ON(VHOST_MEMORY_MAX_NREGIONS != 8);
+       if (dev->vectorized) {
+               for (i = 0; i < memory->nregions; i++) {
+                       dev->regions_low_addrs[i] =
+                               memory->regions[i].guest_phys_addr;
+                       dev->regions_high_addrs[i] =
+                               memory->regions[i].guest_phys_addr +
+                               memory->regions[i].memory_size;
+               }
+       }
+
        for (i = 0; i < dev->nr_vring; i++) {
                struct vhost_virtqueue *vq = dev->virtqueue[i];
 
-- 
2.17.1