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

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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>
This commit is contained in:
Daniel Borkmann 2017-08-10 01:40:01 +02:00 committed by David S. Miller
parent 20dbf5ccbb
commit 5dd294d4eb
1 changed files with 24 additions and 0 deletions
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24
drivers/net/ethernet/netronome/nfp/bpf/jit.c
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@ -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,