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Commit 5dd294d4 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

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: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 20dbf5cc

drivers/net/ethernet/netronome/nfp/bpf/jit.c

+24 −0
Original line number Diff line number Diff line
@@ -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,