bpf, nfp: implement jiting of BPF_J{LT,LE}

This work implements jiting of BPF_J{LT,LE} instructions with
BPF_X/BPF_K variants for the nfp eBPF JIT. The two BPF_J{SLT,SLE}
instructions have not been added yet given BPF_J{SGT,SGE} are
not supported yet either.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 8e57fda..239dfbe 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -1238,6 +1238,16 @@ static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
        return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true);
 }
 
+static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+       return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false);
+}
+
+static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+       return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true);
+}
+
 static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
        const struct bpf_insn *insn = &meta->insn;
@@ -1325,6 +1335,16 @@ static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
        return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true);
 }
 
+static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+       return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false);
+}
+
+static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+       return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true);
+}
+
 static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
        return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE);
@@ -1383,11 +1403,15 @@ static const instr_cb_t instr_cb[256] = {
        [BPF_JMP | BPF_JEQ | BPF_K] =   jeq_imm,
        [BPF_JMP | BPF_JGT | BPF_K] =   jgt_imm,
        [BPF_JMP | BPF_JGE | BPF_K] =   jge_imm,
+       [BPF_JMP | BPF_JLT | BPF_K] =   jlt_imm,
+       [BPF_JMP | BPF_JLE | BPF_K] =   jle_imm,
        [BPF_JMP | BPF_JSET | BPF_K] =  jset_imm,
        [BPF_JMP | BPF_JNE | BPF_K] =   jne_imm,
        [BPF_JMP | BPF_JEQ | BPF_X] =   jeq_reg,
        [BPF_JMP | BPF_JGT | BPF_X] =   jgt_reg,
        [BPF_JMP | BPF_JGE | BPF_X] =   jge_reg,
+       [BPF_JMP | BPF_JLT | BPF_X] =   jlt_reg,
+       [BPF_JMP | BPF_JLE | BPF_X] =   jle_reg,
        [BPF_JMP | BPF_JSET | BPF_X] =  jset_reg,
        [BPF_JMP | BPF_JNE | BPF_X] =   jne_reg,
        [BPF_JMP | BPF_EXIT] =          goto_out,