1. Patch 1 and Patch 2 are dependent patches to resolve the BPF check
error in 32-bit ARM.
2. Patch 3 supports bpf fkunc in 32-bit ARM.
3. Patch 4 is used to add test cases to cover some parameter scenarios
states by AAPCS.
The following is the test_progs result in the 32-bit ARM environment:
# uname -a
Linux qemuarm32 6.1.0-rc3+ #2 SMP Thu Nov 3 15:31:29 CST 2022 armv7l armv7l armv7l GNU/Linux
# echo 1 > /proc/sys/net/core/bpf_jit_enable
# ./test_progs -t kfunc_call
#1/1 kfunc_call/kfunc_syscall_test_fail:OK
#1/2 kfunc_call/kfunc_syscall_test_null_fail:OK
#1/3 kfunc_call/kfunc_call_test_get_mem_fail_rdonly:OK
#1/4 kfunc_call/kfunc_call_test_get_mem_fail_use_after_free:OK
#1/5 kfunc_call/kfunc_call_test_get_mem_fail_oob:OK
#1/6 kfunc_call/kfunc_call_test_get_mem_fail_not_const:OK
#1/7 kfunc_call/kfunc_call_test_mem_acquire_fail:OK
#1/8 kfunc_call/kfunc_call_test1:OK
#1/9 kfunc_call/kfunc_call_test2:OK
#1/10 kfunc_call/kfunc_call_test4:OK
#1/11 kfunc_call/kfunc_call_test_ref_btf_id:OK
#1/12 kfunc_call/kfunc_call_test_get_mem:OK
#1/13 kfunc_call/kfunc_syscall_test:OK
#1/14 kfunc_call/kfunc_syscall_test_null:OK
#1/17 kfunc_call/destructive:OK
Yang Jihong (4):
bpf: Adapt 32-bit return value kfunc for 32-bit ARM when zext
extension
bpf: Remove size check for sk in bpf_skb_is_valid_access for 32-bit
architecture
bpf: Add kernel function call support in 32-bit ARM
bpf:selftests: Add kfunc_call test for mixing 32-bit and 64-bit
parameters
arch/arm/net/bpf_jit_32.c | 130 ++++++++++++++++++
kernel/bpf/verifier.c | 3 +
net/bpf/test_run.c | 6 +
net/core/filter.c | 2 -
.../selftests/bpf/prog_tests/kfunc_call.c | 1 +
.../selftests/bpf/progs/kfunc_call_test.c | 23 ++++
6 files changed, 163 insertions(+), 2 deletions(-)
--
2.30.GIT
