diff mbox series

[v3,13/18] net/virtio: add checks for max SIMD bitwidth

Message ID 20200930130415.11211-14-ciara.power@intel.com (mailing list archive)
State Superseded, archived
Delegated to: David Marchand
Headers
Series add max SIMD bitwidth to EAL |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Power, Ciara Sept. 30, 2020, 1:04 p.m. UTC 
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.coquelin@redhat.com>
Cc: Chenbo Xia <chenbo.xia@intel.com>
Cc: Zhihong Wang <zhihong.wang@intel.com>

Signed-off-by: Ciara Power <ciara.power@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 mbox series

Patch

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;
+			}
 		}
 	}