| Message ID | 20201009011240.48506-1-alexei.starovoitov@gmail.com |
|---|---|
| Headers | show |
| Series | bpf: Make the verifier recognize llvm register allocation patterns. | expand |
Hello: This series was applied to bpf/bpf-next.git (refs/heads/master): On Thu, 8 Oct 2020 18:12:36 -0700 you wrote: > From: Alexei Starovoitov <ast@kernel.org> > > v1->v2: > - fixed 32-bit mov issue spotted by John. > - allowed r2=r1; r3=r2; sequence as suggested by John. > - added comments, acks, more tests. > > [...] Here is the summary with links: - [v2,bpf-next,1/4] bpf: Propagate scalar ranges through register assignments. https://git.kernel.org/bpf/bpf-next/c/75748837b7e5 - [v2,bpf-next,2/4] bpf: Track spill/fill of bounded scalars. https://git.kernel.org/bpf/bpf-next/c/5689d49b71ad - [v2,bpf-next,3/4] selftests/bpf: Add profiler test https://git.kernel.org/bpf/bpf-next/c/03d4d13fab3f - [v2,bpf-next,4/4] selftests/bpf: Asm tests for the verifier regalloc tracking. https://git.kernel.org/bpf/bpf-next/c/54fada41e8a1 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
From: Alexei Starovoitov <ast@kernel.org> v1->v2: - fixed 32-bit mov issue spotted by John. - allowed r2=r1; r3=r2; sequence as suggested by John. - added comments, acks, more tests. Make two verifier improvements: - The llvm register allocator may use two different registers representing the same virtual register. Teach the verifier to recognize that. - Track bounded scalar spill/fill. The profiler[123] test in patch 3 will fail to load without patches 1 and 2. The profiler[23] test may fail to load on older llvm due to speculative code motion nd instruction combining optimizations that are fixed in https://reviews.llvm.org/D85570 Alexei Starovoitov (3): bpf: Propagate scalar ranges through register assignments. selftests/bpf: Add profiler test selftests/bpf: Asm tests for the verifier regalloc tracking. Yonghong Song (1): bpf: Track spill/fill of bounded scalars. kernel/bpf/verifier.c | 66 +- tools/testing/selftests/bpf/README.rst | 38 + .../testing/selftests/bpf/prog_tests/align.c | 16 +- .../selftests/bpf/prog_tests/test_profiler.c | 72 ++ tools/testing/selftests/bpf/progs/profiler.h | 177 ++++ .../selftests/bpf/progs/profiler.inc.h | 969 ++++++++++++++++++ tools/testing/selftests/bpf/progs/profiler1.c | 6 + tools/testing/selftests/bpf/progs/profiler2.c | 6 + tools/testing/selftests/bpf/progs/profiler3.c | 6 + .../bpf/verifier/direct_packet_access.c | 2 +- .../testing/selftests/bpf/verifier/regalloc.c | 243 +++++ 11 files changed, 1591 insertions(+), 10 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/test_profiler.c create mode 100644 tools/testing/selftests/bpf/progs/profiler.h create mode 100644 tools/testing/selftests/bpf/progs/profiler.inc.h create mode 100644 tools/testing/selftests/bpf/progs/profiler1.c create mode 100644 tools/testing/selftests/bpf/progs/profiler2.c create mode 100644 tools/testing/selftests/bpf/progs/profiler3.c create mode 100644 tools/testing/selftests/bpf/verifier/regalloc.c