From: Daniel Borkmann <daniel@iogearbox.net>
Date: Thu, 10 Aug 2017 01:40:01 +0200
Subject: bpf, nfp: implement jiting of BPF_J{LT,LE}
Patch-mainline: v4.14-rc1
Git-commit: 5dd294d4eb634a5f4c877dc487e83f975aa05c11
References: bsc#1055968

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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c |   24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

--- 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_
 	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_
 	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,