[dpdk-dev] [PATCH v2 3/5] vhost: prepare memory regions addresses
Marvin Liu
yong.liu at intel.com
Mon Sep 21 08:48:35 CEST 2020
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.liu at 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
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