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| author | Christoph Hellwig <hch@lst.de> | 2022-01-03 19:35:53 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-01-05 22:11:26 +0100 |
| commit | 894cda554c3c3dc836f3cc873c47a465ba9433b4 (patch) | |
| tree | 9d9b8a727b8e0c2a6bd8d75c92fc03e32957d0a5 /Documentation | |
| parent | bpf, docs: Add subsections for ALU and JMP instructions (diff) | |
| download | linux-894cda554c3c3dc836f3cc873c47a465ba9433b4.tar.xz linux-894cda554c3c3dc836f3cc873c47a465ba9433b4.zip | |
bpf, docs: Document the opcode classes
Add a description for each opcode class.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220103183556.41040-4-hch@lst.de
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/bpf/instruction-set.rst | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst index 03bf3c6c5577..2987cbb07f7f 100644 --- a/Documentation/bpf/instruction-set.rst +++ b/Documentation/bpf/instruction-set.rst @@ -38,18 +38,18 @@ Instruction classes The three LSB bits of the 'opcode' field store the instruction class: - ========= ===== - class value - ========= ===== - BPF_LD 0x00 - BPF_LDX 0x01 - BPF_ST 0x02 - BPF_STX 0x03 - BPF_ALU 0x04 - BPF_JMP 0x05 - BPF_JMP32 0x06 - BPF_ALU64 0x07 - ========= ===== + ========= ===== =============================== + class value description + ========= ===== =============================== + BPF_LD 0x00 non-standard load operations + BPF_LDX 0x01 load into register operations + BPF_ST 0x02 store from immediate operations + BPF_STX 0x03 store from register operations + BPF_ALU 0x04 32-bit arithmetic operations + BPF_JMP 0x05 64-bit jump operations + BPF_JMP32 0x06 32-bit jump operations + BPF_ALU64 0x07 64-bit arithmetic operations + ========= ===== =============================== Arithmetic and jump instructions ================================ |