The basic support for LoongArch has been merged into the upstream Linux kernel since 5.19-rc1 on June 5, 2022, this patch series adds BPF JIT support for LoongArch. Here is the LoongArch documention: https://www.kernel.org/doc/html/latest/loongarch/index.html This patch series is based on the loongarch-next branch of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/ With this patch series, the test cases in lib/test_bpf.ko have passed on LoongArch. # echo 1 > /proc/sys/net/core/bpf_jit_enable # modprobe test_bpf # dmesg | grep Summary test_bpf: Summary: 1026 PASSED, 0 FAILED, [1014/1014 JIT'ed] test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [10/10 JIT'ed] test_bpf: test_skb_segment: Summary: 2 PASSED, 0 FAILED This version is RFC, I am working on it to do some more optimizations and looking forward to your feedback, any comments will be much appreciated. After the merge window, I will rebase and address the review comments. Tiezhu Yang (5): LoongArch: Fix some instruction formats LoongArch: Add some instruction opcodes and formats LoongArch: Add BPF JIT support LoongArch: Update loongson3_defconfig to make it clean LoongArch: Enable BPF_JIT and TEST_BPF in loongson3_defconfig arch/loongarch/Kbuild | 1 + arch/loongarch/Kconfig | 1 + arch/loongarch/configs/loongson3_defconfig | 58 +- arch/loongarch/include/asm/inst.h | 147 +++- arch/loongarch/net/Makefile | 7 + arch/loongarch/net/bpf_jit.c | 1119 ++++++++++++++++++++++++++++ arch/loongarch/net/bpf_jit.h | 946 +++++++++++++++++++++++ 7 files changed, 2222 insertions(+), 57 deletions(-) create mode 100644 arch/loongarch/net/Makefile create mode 100644 arch/loongarch/net/bpf_jit.c create mode 100644 arch/loongarch/net/bpf_jit.h -- 2.1.0
