BPF related fixes mostly related to JIT. The arm64 BPF JIT did not implement BPF_LD | BPF_ABS or BPF_LD | BPF_IND, so cBPF filters converted by rte_bpf_convert() could not be JIT compiled and silently fell back to the interpreter on arm64.
The first patch fixes a latent bug in emit_return_zero_if_src_zero(): the offset of the branch to the epilogue was held in an unsigned. A backward branch wrapped around. Existing JIT tests were never being run on ARM. The next two patches make the bpf tests assert that, on an architecture with a JITbackend, code is actually generated, so a missing or failed JIT is reported rather than skipped. The final patch adds the ABS/IND opcodes, mirroring the x86 JIT with a fast path for data in the first mbuf segment and a __rte_pktmbuf_read() slow path for the rest. Christophe Fontaine (1): bpf/arm64: fix offset type to allow a negative jump Stephen Hemminger (9): bpf/x86: fix JIT encoding of fixed-width immediates test/bpf: add JSET test with small immediate bpf: mask shift count in interpreter per RFC 9669 bpf/arm64: mask shift count per RFC 9669 test/bpf: add test for large shift bpf/arm64: add BPF_ABS/BPF_IND packet load support test/bpf: check that JIT was generated test/bpf: check that bpf_convert can be JIT'd bpf: fix uninitialized warning app/test/test_bpf.c | 320 +++++++++++++++++++++++++++++++--------- lib/bpf/bpf_exec.c | 31 ++-- lib/bpf/bpf_jit_arm64.c | 185 ++++++++++++++++++++++- lib/bpf/bpf_jit_x86.c | 6 +- lib/bpf/bpf_validate.c | 2 +- lib/bpf/meson.build | 2 + 6 files changed, 457 insertions(+), 89 deletions(-) -- 2.53.0
