When choosing a vector path to take, an extra condition must be
satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
path.
Cc: Maxime Coquelin <maxime.coque...@redhat.com>
Cc: Chenbo Xia <chenbo....@intel.com>
Cc: Zhihong Wang <zhihong.w...@intel.com>
Signed-off-by: Ciara Power <ciara.po...@intel.com>
---
v3: Moved max SIMD bitwidth check to configure function with other vec
support checks.
---
drivers/net/virtio/virtio_ethdev.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c
b/drivers/net/virtio/virtio_ethdev.c
index 013a2904e6..f749e81405 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -2306,7 +2306,8 @@ virtio_dev_configure(struct rte_eth_dev *dev)
if ((hw->use_vec_rx || hw->use_vec_tx) &&
(!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
!vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
- !vtpci_with_feature(hw, VIRTIO_F_VERSION_1))) {
+ !vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
+ rte_get_max_simd_bitwidth() < RTE_MAX_512_SIMD)) {
PMD_DRV_LOG(INFO,
"disabled packed ring vectorized path for
requirements not met");
hw->use_vec_rx = 0;
@@ -2359,6 +2360,12 @@ virtio_dev_configure(struct rte_eth_dev *dev)
"disabled split ring vectorized rx for
offloading enabled");
hw->use_vec_rx = 0;
}
+
+ if (rte_get_max_simd_bitwidth() < RTE_MAX_128_SIMD) {
+ PMD_DRV_LOG(INFO,
+ "disabled split ring vectorized rx, max
SIMD bitwidth too low");
+ hw->use_vec_rx = 0;
+ }
}
}
--
2.17.1
