Hi folks, These patches add KCFI types to arm64 BPF JIT output. Puranjay and Maxwell have been working on this for some time now, but I haven't seen any progress since June 2024, so I decided to pick up the latest version[1] posted by Maxwell and fix the few remaining issues I noticed. I confirmed that with these patches applied, I no longer see CFI failures when running BPF self-tests on arm64. [1] https://lore.kernel.org/linux-arm-kernel/ptrugmna4xb5o5lo4xislf4rlz7avdmd4pfho5fjwtjj7v422u@iqrwfrbwuxrq/ Sami --- v8: - Changed DEFINE_CFI_TYPE to use .4byte to match __CFI_TYPE. - Changed cfi_get_func_hash() to again use get_kernel_nofault(). - Fixed a panic in bpf_jit_free() by resetting prog->bpf_func before calling bpf_jit_binary_pack_hdr(). --- Mark Rutland (1): cfi: add C CFI type macro Puranjay Mohan (1): arm64/cfi,bpf: Support kCFI + BPF on arm64 arch/arm64/include/asm/cfi.h | 23 ++++++++++++++++++++++ arch/arm64/kernel/alternative.c | 25 +++++++++++++++++++++++ arch/arm64/net/bpf_jit_comp.c | 22 ++++++++++++++++++--- arch/riscv/kernel/cfi.c | 35 +++------------------------------ arch/x86/kernel/alternative.c | 35 +++------------------------------ include/linux/cfi_types.h | 23 ++++++++++++++++++++++ 6 files changed, 96 insertions(+), 67 deletions(-) create mode 100644 arch/arm64/include/asm/cfi.h -- 2.49.0.rc0.332.g42c0ae87b1-goog
