Hi! The core of this series is direct packet access support. With a small change to the verifier, the offloaded code can now make use of DPA. We need to be careful to use kernel (after initial translation) offsets in our JIT. Direct packet access also brings us to the problem of eBPF endianness. After considering the changes necessary we decided to not support translation on both BE and LE hosts, for now.
This series contains two fixes - one for compare instructions and one for ineffective jne optimization. I chose to include fixes in this set because the code in -net works only with unreleased PoC FW (ABI version 1) and therefore nobody outside of Netronome can exercise it anyway. Jakub Kicinski (12): bpf: verifier: set reg_type on context accesses in second pass nfp: bpf: reorder arguments to emit_ld_field_any() nfp: bpf: add missing return in jne_imm optimization nfp: bpf: fix compare instructions nfp: bpf: add mov helper nfp: bpf: implement byte swap instruction nfp: bpf: support BPF offload only on little endian nfp: bpf: fix context accesses nfp: bpf: separate I/O from checks for legacy data load nfp: bpf: add support for direct packet access - read nfp: bpf: direct packet access - write nfp: bpf: support direct packet access in TC drivers/net/ethernet/netronome/nfp/bpf/jit.c | 402 ++++++++++++++++++---- drivers/net/ethernet/netronome/nfp/bpf/main.c | 2 + drivers/net/ethernet/netronome/nfp/bpf/main.h | 3 + drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 21 +- drivers/net/ethernet/netronome/nfp/nfp_asm.c | 5 +- drivers/net/ethernet/netronome/nfp/nfp_asm.h | 6 +- kernel/bpf/verifier.c | 43 ++- 7 files changed, 393 insertions(+), 89 deletions(-) -- 2.14.1
