diff options
| author | Haiyang Zhang <haiyangz@microsoft.com> | 2020-01-23 22:52:34 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-25 10:43:19 +0100 |
| commit | 351e1581395fcc7fb952bbd7dda01238f69968fd (patch) | |
| tree | 603affba2df25970a5036668b79c1717212e7dba /drivers/net/hyperv/Makefile | |
| parent | devlink: Add health recover notifications on devlink flows (diff) | |
| download | linux-351e1581395fcc7fb952bbd7dda01238f69968fd.tar.xz linux-351e1581395fcc7fb952bbd7dda01238f69968fd.zip | |
hv_netvsc: Add XDP support
This patch adds support of XDP in native mode for hv_netvsc driver, and
transparently sets the XDP program on the associated VF NIC as well.
Setting / unsetting XDP program on synthetic NIC (netvsc) propagates to
VF NIC automatically. Setting / unsetting XDP program on VF NIC directly
is not recommended, also not propagated to synthetic NIC, and may be
overwritten by setting of synthetic NIC.
The Azure/Hyper-V synthetic NIC receive buffer doesn't provide headroom
for XDP. We thought about re-use the RNDIS header space, but it's too
small. So we decided to copy the packets to a page buffer for XDP. And,
most of our VMs on Azure have Accelerated Network (SRIOV) enabled, so
most of the packets run on VF NIC. The synthetic NIC is considered as a
fallback data-path. So the data copy on netvsc won't impact performance
significantly.
XDP program cannot run with LRO (RSC) enabled, so you need to disable LRO
before running XDP:
ethtool -K eth0 lro off
XDP actions not yet supported:
XDP_REDIRECT
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/Makefile')
| -rw-r--r-- | drivers/net/hyperv/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/hyperv/Makefile b/drivers/net/hyperv/Makefile index 3a2aa0708166..0db7ccaec4a4 100644 --- a/drivers/net/hyperv/Makefile +++ b/drivers/net/hyperv/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o -hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o netvsc_trace.o +hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o netvsc_trace.o netvsc_bpf.o |