Hi David, The following pull-request contains BPF updates for your *net-next* tree.
The main changes are: 1) Addition of a software model for BPF offloads in order to ease testing code changes in that area and make semantics more clear. This is implemented in a new driver called netdevsim, which can later also be extended for other offloads. SR-IOV support is added as well to netdevsim. BPF kernel selftests for offloading are added so we can track basic functionality as well as exercising all corner cases around BPF offloading, from Jakub. 2) Today drivers have to drop the reference on BPF progs they hold due to XDP on device teardown themselves. Change this in order to make XDP handling inside the drivers less error prone, and move disabling XDP to the core instead, also from Jakub. 3) Misc set of BPF verifier improvements and cleanups as preparatory work for upcoming BPF-to-BPF calls. Among others, this set also improves liveness marking such that pruning can be slightly more effective. Register and stack liveness information is now included in the verifier log as well, from Alexei. 4) nfp JIT improvements in order to identify load/store sequences in the BPF prog e.g. coming from memcpy lowering and optimizing them through the NPU's command push pull (CPP) instruction, from Jiong. 5) Cleanups to test_cgrp2_attach2.c BPF sample code in oder to remove bpf_prog_attach() magic values and replacing them with actual proper attach flag instead, from David. Please consider pulling these changes from: git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git Thanks a lot! ---------------------------------------------------------------- The following changes since commit 9f66816a6a4dd740bfa29cc8a8e19b90fd7df4e7: net: dsa: bcm_sf2: Utilize b53_get_tag_protocol() (2017-11-30 13:00:04 -0500) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git for you to fetch changes up to 6720f1084c066a5ba051a250e9d5d8c2ad4f554c: Merge branch 'bpf-xdp-stack-uninit-and-offload-tests' (2017-12-03 00:27:59 +0100) ---------------------------------------------------------------- Alexei Starovoitov (7): bpf: fix stack state printing in verifier log bpf: print liveness info to verifier log bpf: don't mark FP reg as uninit bpf: improve verifier liveness marks bpf: improve JEQ/JNE path walking bpf: cleanup register_is_null() selftests/bpf: adjust test_align expected output Daniel Borkmann (3): Merge branch 'bpf-verifier-misc-improvements' Merge branch 'bpf-nfp-jmp-memcpy-improvements' Merge branch 'bpf-xdp-stack-uninit-and-offload-tests' David Ahern (1): samples/bpf: Convert magic numbers to names in multi-prog cgroup test case Jakub Kicinski (10): nfp: fix old kdoc issues nfp: bpf: encode indirect commands net: xdp: avoid output parameters when querying XDP prog net: xdp: report flags program was installed with on query net: xdp: make the stack take care of the tear down netdevsim: add software driver for testing offloads netdevsim: add bpf offload support selftests/bpf: add offload test based on netdevsim netdevsim: add SR-IOV functionality net: dummy: remove fake SR-IOV functionality Jiong Wang (11): nfp: bpf: support backward jump nfp: bpf: record jump destination to simplify jump fixup nfp: bpf: flag jump destination to guide insn combine optimizations nfp: bpf: don't do ld/mask combination if mask is jump destination nfp: bpf: don't do ld/shifts combination if shifts are jump destination nfp: bpf: relax source operands check nfp: bpf: correct the encoding for No-Dest immed nfp: bpf: factor out is_mbpf_load & is_mbpf_store nfp: bpf: implement memory bulk copy for length within 32-bytes nfp: bpf: implement memory bulk copy for length bigger than 32-bytes nfp: bpf: detect load/store sequences lowered from memory copy MAINTAINERS | 5 + drivers/net/Kconfig | 11 + drivers/net/Makefile | 1 + drivers/net/dummy.c | 215 +------ drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 - drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 3 - drivers/net/ethernet/netronome/nfp/bpf/jit.c | 487 +++++++++++++-- drivers/net/ethernet/netronome/nfp/bpf/main.c | 7 - drivers/net/ethernet/netronome/nfp/bpf/main.h | 35 +- drivers/net/ethernet/netronome/nfp/bpf/offload.c | 23 +- drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 8 +- drivers/net/ethernet/netronome/nfp/nfp_asm.c | 7 +- drivers/net/ethernet/netronome/nfp/nfp_asm.h | 7 +- drivers/net/ethernet/netronome/nfp/nfp_net.h | 2 + .../net/ethernet/netronome/nfp/nfp_net_common.c | 4 +- .../ethernet/netronome/nfp/nfpcore/nfp_cppcore.c | 9 +- drivers/net/ethernet/qlogic/qede/qede_main.c | 4 - drivers/net/netdevsim/Makefile | 7 + drivers/net/netdevsim/bpf.c | 373 +++++++++++ drivers/net/netdevsim/netdev.c | 502 +++++++++++++++ drivers/net/netdevsim/netdevsim.h | 78 +++ drivers/net/tun.c | 4 - include/linux/netdevice.h | 5 +- kernel/bpf/verifier.c | 62 +- net/core/dev.c | 53 +- net/core/rtnetlink.c | 6 +- samples/bpf/test_cgrp2_attach2.c | 36 +- tools/testing/selftests/bpf/Makefile | 5 +- tools/testing/selftests/bpf/sample_ret0.c | 7 + tools/testing/selftests/bpf/test_align.c | 156 ++--- tools/testing/selftests/bpf/test_offload.py | 681 +++++++++++++++++++++ 31 files changed, 2362 insertions(+), 443 deletions(-) create mode 100644 drivers/net/netdevsim/Makefile create mode 100644 drivers/net/netdevsim/bpf.c create mode 100644 drivers/net/netdevsim/netdev.c create mode 100644 drivers/net/netdevsim/netdevsim.h create mode 100644 tools/testing/selftests/bpf/sample_ret0.c create mode 100755 tools/testing/selftests/bpf/test_offload.py