diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 4fa220f710d2..d7dc19feba8d 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -153,6 +153,11 @@ emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
 		nfp_prog->error = -EFAULT;
 		return;
 	}
+	if (reg.dst_lmextn || reg.src_lmextn) {
+		pr_err("cmd can't use LMextn\n");
+		nfp_prog->error = -EFAULT;
+		return;
+	}
 
 	__emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync);
 }
@@ -198,7 +203,7 @@ emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer)
 
 static void
 __emit_br_byte(struct nfp_prog *nfp_prog, u8 areg, u8 breg, bool imm8,
-	       u8 byte, bool equal, u16 addr, u8 defer)
+	       u8 byte, bool equal, u16 addr, u8 defer, bool src_lmextn)
 {
 	u16 addr_lo, addr_hi;
 	u64 insn;
@@ -214,32 +219,34 @@ __emit_br_byte(struct nfp_prog *nfp_prog, u8 areg, u8 breg, bool imm8,
 		FIELD_PREP(OP_BB_EQ, equal) |
 		FIELD_PREP(OP_BB_DEFBR, defer) |
 		FIELD_PREP(OP_BB_ADDR_LO, addr_lo) |
-		FIELD_PREP(OP_BB_ADDR_HI, addr_hi);
+		FIELD_PREP(OP_BB_ADDR_HI, addr_hi) |
+		FIELD_PREP(OP_BB_SRC_LMEXTN, src_lmextn);
 
 	nfp_prog_push(nfp_prog, insn);
 }
 
 static void
 emit_br_byte_neq(struct nfp_prog *nfp_prog,
-		 swreg dst, u8 imm, u8 byte, u16 addr, u8 defer)
+		 swreg src, u8 imm, u8 byte, u16 addr, u8 defer)
 {
 	struct nfp_insn_re_regs reg;
 	int err;
 
-	err = swreg_to_restricted(reg_none(), dst, reg_imm(imm), &reg, true);
+	err = swreg_to_restricted(reg_none(), src, reg_imm(imm), &reg, true);
 	if (err) {
 		nfp_prog->error = err;
 		return;
 	}
 
 	__emit_br_byte(nfp_prog, reg.areg, reg.breg, reg.i8, byte, false, addr,
-		       defer);
+		       defer, reg.src_lmextn);
 }
 
 static void
 __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi,
 	     enum immed_width width, bool invert,
-	     enum immed_shift shift, bool wr_both)
+	     enum immed_shift shift, bool wr_both,
+	     bool dst_lmextn, bool src_lmextn)
 {
 	u64 insn;
 
@@ -250,7 +257,9 @@ __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi,
 		FIELD_PREP(OP_IMMED_WIDTH, width) |
 		FIELD_PREP(OP_IMMED_INV, invert) |
 		FIELD_PREP(OP_IMMED_SHIFT, shift) |
-		FIELD_PREP(OP_IMMED_WR_AB, wr_both);
+		FIELD_PREP(OP_IMMED_WR_AB, wr_both) |
+		FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) |
+		FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn);
 
 	nfp_prog_push(nfp_prog, insn);
 }
@@ -274,13 +283,15 @@ emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm,
 	}
 
 	__emit_immed(nfp_prog, reg.areg, reg.breg, imm >> 8, width,
-		     invert, shift, reg.wr_both);
+		     invert, shift, reg.wr_both,
+		     reg.dst_lmextn, reg.src_lmextn);
 }
 
 static void
 __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab,
 	   enum shf_sc sc, u8 shift,
-	   u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both)
+	   u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both,
+	   bool dst_lmextn, bool src_lmextn)
 {
 	u64 insn;
 
@@ -302,7 +313,9 @@ __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab,
 		FIELD_PREP(OP_SHF_SHIFT, shift) |
 		FIELD_PREP(OP_SHF_OP, op) |
 		FIELD_PREP(OP_SHF_DST_AB, dst_ab) |
-		FIELD_PREP(OP_SHF_WR_AB, wr_both);
+		FIELD_PREP(OP_SHF_WR_AB, wr_both) |
+		FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) |
+		FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn);
 
 	nfp_prog_push(nfp_prog, insn);
 }
@@ -321,12 +334,14 @@ emit_shf(struct nfp_prog *nfp_prog, swreg dst,
 	}
 
 	__emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift,
-		   reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both);
+		   reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both,
+		   reg.dst_lmextn, reg.src_lmextn);
 }
 
 static void
 __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab,
-	   u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both)
+	   u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both,
+	   bool dst_lmextn, bool src_lmextn)
 {
 	u64 insn;
 
@@ -337,7 +352,9 @@ __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab,
 		FIELD_PREP(OP_ALU_SW, swap) |
 		FIELD_PREP(OP_ALU_OP, op) |
 		FIELD_PREP(OP_ALU_DST_AB, dst_ab) |
-		FIELD_PREP(OP_ALU_WR_AB, wr_both);
+		FIELD_PREP(OP_ALU_WR_AB, wr_both) |
+		FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) |
+		FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn);
 
 	nfp_prog_push(nfp_prog, insn);
 }
@@ -356,13 +373,15 @@ emit_alu(struct nfp_prog *nfp_prog, swreg dst,
 	}
 
 	__emit_alu(nfp_prog, reg.dst, reg.dst_ab,
-		   reg.areg, op, reg.breg, reg.swap, reg.wr_both);
+		   reg.areg, op, reg.breg, reg.swap, reg.wr_both,
+		   reg.dst_lmextn, reg.src_lmextn);
 }
 
 static void
 __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc,
 		u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8,
-		bool zero, bool swap, bool wr_both)
+		bool zero, bool swap, bool wr_both,
+		bool dst_lmextn, bool src_lmextn)
 {
 	u64 insn;
 
@@ -375,7 +394,9 @@ __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc,
 		FIELD_PREP(OP_LDF_ZF, zero) |
 		FIELD_PREP(OP_LDF_BMASK, bmask) |
 		FIELD_PREP(OP_LDF_SHF, shift) |
-		FIELD_PREP(OP_LDF_WR_AB, wr_both);
+		FIELD_PREP(OP_LDF_WR_AB, wr_both) |
+		FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) |
+		FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn);
 
 	nfp_prog_push(nfp_prog, insn);
 }
@@ -394,7 +415,8 @@ emit_ld_field_any(struct nfp_prog *nfp_prog, enum shf_sc sc, u8 shift,
 	}
 
 	__emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift,
-			reg.i8, zero, reg.swap, reg.wr_both);
+			reg.i8, zero, reg.swap, reg.wr_both,
+			reg.dst_lmextn, reg.src_lmextn);
 }
 
 static void
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.c b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
index 4bcab43da16d..1decc638ea6f 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
@@ -130,6 +130,9 @@ int swreg_to_unrestricted(swreg dst, swreg lreg, swreg rreg,
 		reg->breg = nfp_swreg_to_unreg(rreg, false);
 	}
 
+	reg->dst_lmextn = swreg_lmextn(dst);
+	reg->src_lmextn = swreg_lmextn(lreg) | swreg_lmextn(rreg);
+
 	return 0;
 }
 
@@ -207,5 +210,8 @@ int swreg_to_restricted(swreg dst, swreg lreg, swreg rreg,
 		reg->breg = nfp_swreg_to_rereg(rreg, false, has_imm8, &reg->i8);
 	}
 
+	reg->dst_lmextn = swreg_lmextn(dst);
+	reg->src_lmextn = swreg_lmextn(lreg) | swreg_lmextn(rreg);
+
 	return 0;
 }
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.h b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
index d722f6878bd8..40a51a45afd7 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
@@ -100,6 +100,7 @@ enum br_ctx_signal_state {
 #define OP_BB_DEFBR		0x00000300000ULL
 #define OP_BB_ADDR_LO		0x007ffc00000ULL
 #define OP_BB_ADDR_HI		0x10000000000ULL
+#define OP_BB_SRC_LMEXTN	0x40000000000ULL
 
 #define OP_BALU_BASE		0x0e800000000ULL
 #define OP_BA_A_SRC		0x000000003ffULL
@@ -115,6 +116,8 @@ enum br_ctx_signal_state {
 #define OP_IMMED_SHIFT		0x00600000000ULL
 #define OP_IMMED_BASE		0x0f000000000ULL
 #define OP_IMMED_WR_AB		0x20000000000ULL
+#define OP_IMMED_SRC_LMEXTN	0x40000000000ULL
+#define OP_IMMED_DST_LMEXTN	0x80000000000ULL
 
 enum immed_width {
 	IMMED_WIDTH_ALL = 0,
@@ -139,6 +142,8 @@ enum immed_shift {
 #define OP_SHF_OP		0x00e00000000ULL
 #define OP_SHF_DST_AB		0x01000000000ULL
 #define OP_SHF_WR_AB		0x20000000000ULL
+#define OP_SHF_SRC_LMEXTN	0x40000000000ULL
+#define OP_SHF_DST_LMEXTN	0x80000000000ULL
 
 enum shf_op {
 	SHF_OP_NONE = 0,
@@ -161,6 +166,8 @@ enum shf_sc {
 #define OP_ALU_DST_AB		0x01000000000ULL
 #define OP_ALU_BASE		0x0a000000000ULL
 #define OP_ALU_WR_AB		0x20000000000ULL
+#define OP_ALU_SRC_LMEXTN	0x40000000000ULL
+#define OP_ALU_DST_LMEXTN	0x80000000000ULL
 
 enum alu_op {
 	ALU_OP_NONE	= 0x00,
@@ -189,6 +196,8 @@ enum alu_dst_ab {
 #define OP_LDF_BMASK		0x0000f000000ULL
 #define OP_LDF_SHF		0x001f0000000ULL
 #define OP_LDF_WR_AB		0x20000000000ULL
+#define OP_LDF_SRC_LMEXTN	0x40000000000ULL
+#define OP_LDF_DST_LMEXTN	0x80000000000ULL
 
 #define OP_CMD_A_SRC		0x000000000ffULL
 #define OP_CMD_CTX		0x00000000300ULL
@@ -231,6 +240,8 @@ enum cmd_ctx_swap {
 #define OP_LCSR_B_SRC		0x000000ffc00ULL
 #define OP_LCSR_WRITE		0x00000200000ULL
 #define OP_LCSR_ADDR		0x001ffc00000ULL
+#define OP_LCSR_SRC_LMEXTN	0x40000000000ULL
+#define OP_LCSR_DST_LMEXTN	0x80000000000ULL
 
 enum lcsr_wr_src {
 	LCSR_WR_AREG,
@@ -243,7 +254,9 @@ enum lcsr_wr_src {
 
 /* Software register representation, independent of operand type */
 #define NN_REG_TYPE	GENMASK(31, 24)
-#define NN_REG_LM_IDX	BIT(22)
+#define NN_REG_LM_IDX	GENMASK(23, 22)
+#define NN_REG_LM_IDX_HI	BIT(23)
+#define NN_REG_LM_IDX_LO	BIT(22)
 #define NN_REG_LM_MOD	GENMASK(21, 20)
 #define NN_REG_VAL	GENMASK(7, 0)
 
@@ -285,7 +298,7 @@ static inline swreg __enc_swreg(u16 id, u8 type)
 
 static inline swreg __enc_swreg_lm(u8 id, enum nfp_bpf_lm_mode mode, u8 off)
 {
-	WARN_ON(id > 1 || (off && mode != NN_LM_MOD_NONE));
+	WARN_ON(id > 3 || (off && mode != NN_LM_MOD_NONE));
 
 	return (__force swreg)(FIELD_PREP(NN_REG_TYPE, NN_REG_LMEM) |
 			       FIELD_PREP(NN_REG_LM_IDX, id) |
@@ -310,7 +323,12 @@ static inline u16 swreg_value(swreg reg)
 
 static inline bool swreg_lm_idx(swreg reg)
 {
-	return FIELD_GET(NN_REG_LM_IDX, swreg_raw(reg));
+	return FIELD_GET(NN_REG_LM_IDX_LO, swreg_raw(reg));
+}
+
+static inline bool swreg_lmextn(swreg reg)
+{
+	return FIELD_GET(NN_REG_LM_IDX_HI, swreg_raw(reg));
 }
 
 static inline enum nfp_bpf_lm_mode swreg_lm_mode(swreg reg)
@@ -324,6 +342,8 @@ struct nfp_insn_ur_regs {
 	u16 areg, breg;
 	bool swap;
 	bool wr_both;
+	bool dst_lmextn;
+	bool src_lmextn;
 };
 
 struct nfp_insn_re_regs {
@@ -333,6 +353,8 @@ struct nfp_insn_re_regs {
 	bool swap;
 	bool wr_both;
 	bool i8;
+	bool dst_lmextn;
+	bool src_lmextn;
 };
 
 int swreg_to_unrestricted(swreg dst, swreg lreg, swreg rreg,