redonkable/alistair23-linux
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nfp: bpf: add signed jump insns

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This patch adds signed jump instructions (jsgt, jsge, jslt, jsle)
to the nfp jit. As well as adding the additional required raw
assembler branch mask to nfp_asm.h

Signed-off-by: Nic Viljoen <nick.viljoen@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Nic Viljoen 2018-01-10 12:26:05 +00:00 committed by Daniel Borkmann
parent af93d15ac6
commit c087aa8bbf
2 changed files with 49 additions and 0 deletions
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48
drivers/net/ethernet/netronome/nfp/bpf/jit.c
View file

@ -1914,6 +1914,26 @@ static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true);
}
static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true);
}
static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false);
}
static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false);
}
static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true);
}
static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
const struct bpf_insn *insn = &meta->insn;
@ -2003,6 +2023,26 @@ static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true);
}
static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true);
}
static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false);
}
static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false);
}
static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
{
return wrp_cmp_reg(nfp_prog, meta, BR_BGE, 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);
@ -2087,6 +2127,10 @@ static const instr_cb_t instr_cb[256] = {
[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_JSGT | BPF_K] = jsgt_imm,
[BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm,
[BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm,
[BPF_JMP | BPF_JSLE | BPF_K] = jsle_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,
@ -2094,6 +2138,10 @@ static const instr_cb_t instr_cb[256] = {
[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_JSGT | BPF_X] = jsgt_reg,
[BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg,
[BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg,
[BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg,
[BPF_JMP | BPF_JSET | BPF_X] = jset_reg,
[BPF_JMP | BPF_JNE | BPF_X] = jne_reg,
[BPF_JMP | BPF_CALL] = call,

1
drivers/net/ethernet/netronome/nfp/nfp_asm.h
View file

@ -81,6 +81,7 @@ enum br_mask {
BR_BHS = 0x04,
BR_BLO = 0x05,
BR_BGE = 0x08,
BR_BLT = 0x09,
BR_UNC = 0x18,
};