On Tue, Aug 05, 2025 at 09:45:39AM +0200, Christophe Leroy wrote: > > > Le 05/08/2025 à 08:27, Saket Kumar Bhaskar a écrit : > > This patch series introduces support for the PROBE_MEM32, > > bpf_addr_space_cast and PROBE_ATOMIC instructions in the powerpc BPF JIT, > > facilitating the implementation of BPF arena and arena atomics. > > This series seems to be limited to powerpc64. Please make it explicit in all > patches subject, see exemple below: > > $ git log --oneline arch/powerpc/net/bpf_jit_comp64.c > cf2a6de32cabb (tag: powerpc-6.17-2, origin/next-test, origin/next) > powerpc64/bpf: Add jit support for load_acquire and store_release > 59ba025948be2 powerpc/bpf: fix JIT code size calculation of bpf trampoline > d243b62b7bd3d powerpc64/bpf: Add support for bpf trampolines > 9670f6d2097c4 powerpc64/bpf: Fold bpf_jit_emit_func_call_hlp() into > bpf_jit_emit_func_call_rel() > fde318326daa4 powerpc64/bpf: jit support for signed division and modulo > 597b1710982d1 powerpc64/bpf: jit support for sign extended mov > 717756c9c8dda powerpc64/bpf: jit support for sign extended load > a71c0b09a14db powerpc64/bpf: jit support for unconditional byte swap > 3c086ce222cef powerpc64/bpf: jit support for 32bit offset jmp instruction > b1e7cee961274 powerpc/bpf: enforce full ordering for ATOMIC operations with > BPF_FETCH > 61688a82e047a powerpc/bpf: enable kfunc call > Chris, will keep this in mind while sending v2. > > > > > The last patch in the series has fix for arena spinlock selftest > > failure. > > > > This series is rebased on top of: > > https://lore.kernel.org/bpf/20250717202935.29018-2-puranjay@xxxxxxxxxx/ > > > > All selftests related to bpf_arena, bpf_arena_atomic(except > > load_acquire/store_release) enablement are passing: > > > > # ./test_progs -t arena_list > > #5/1 arena_list/arena_list_1:OK > > #5/2 arena_list/arena_list_1000:OK > > #5 arena_list:OK > > Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED > > > > # ./test_progs -t arena_htab > > #4/1 arena_htab/arena_htab_llvm:OK > > #4/2 arena_htab/arena_htab_asm:OK > > #4 arena_htab:OK > > Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED > > > > # ./test_progs -t verifier_arena > > #464/1 verifier_arena/basic_alloc1:OK > > #464/2 verifier_arena/basic_alloc2:OK > > #464/3 verifier_arena/basic_alloc3:OK > > #464/4 verifier_arena/iter_maps1:OK > > #464/5 verifier_arena/iter_maps2:OK > > #464/6 verifier_arena/iter_maps3:OK > > #464 verifier_arena:OK > > #465/1 verifier_arena_large/big_alloc1:OK > > #465/2 verifier_arena_large/big_alloc2:OK > > #465 verifier_arena_large:OK > > Summary: 2/8 PASSED, 0 SKIPPED, 0 FAILED > > > > # ./test_progs -t arena_atomics > > #3/1 arena_atomics/add:OK > > #3/2 arena_atomics/sub:OK > > #3/3 arena_atomics/and:OK > > #3/4 arena_atomics/or:OK > > #3/5 arena_atomics/xor:OK > > #3/6 arena_atomics/cmpxchg:OK > > #3/7 arena_atomics/xchg:OK > > #3/8 arena_atomics/uaf:OK > > #3/9 arena_atomics/load_acquire:SKIP > > #3/10 arena_atomics/store_release:SKIP > > #3 arena_atomics:OK (SKIP: 2/10) > > Summary: 1/8 PASSED, 2 SKIPPED, 0 FAILED > > > > All selftests related to arena_spin_lock are passing: > > > > # ./test_progs -t arena_spin_lock > > #6/1 arena_spin_lock/arena_spin_lock_1:OK > > #6/2 arena_spin_lock/arena_spin_lock_1000:OK > > #6/3 arena_spin_lock/arena_spin_lock_50000:OK > > #6 arena_spin_lock:OK > > Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED > > > > Saket Kumar Bhaskar (6): > > bpf,powerpc: Introduce bpf_jit_emit_probe_mem_store() to emit store > > instructions > > bpf,powerpc: Implement PROBE_MEM32 pseudo instructions > > bpf,powerpc: Implement bpf_addr_space_cast instruction > > bpf,powerpc: Introduce bpf_jit_emit_atomic_ops() to emit atomic > > instructions > > bpf,powerpc: Implement PROBE_ATOMIC instructions > > selftests/bpf: Fix arena_spin_lock selftest failure > > > > arch/powerpc/net/bpf_jit.h | 6 +- > > arch/powerpc/net/bpf_jit_comp.c | 32 +- > > arch/powerpc/net/bpf_jit_comp32.c | 2 +- > > arch/powerpc/net/bpf_jit_comp64.c | 378 +++++++++++++----- > > .../bpf/prog_tests/arena_spin_lock.c | 23 +- > > .../selftests/bpf/progs/arena_spin_lock.c | 8 +- > > .../selftests/bpf/progs/bpf_arena_spin_lock.h | 4 +- > > 7 files changed, 348 insertions(+), 105 deletions(-) > > > > base-commit: ea2aecdf7a954a8c0015e185cc870c4191d1d93f >
