netdev - [PATH bpf-next 09/13] s390: bpf: implement jitting of JMP32

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Message-Id: <1545259460-13376-10-git-send-email-jiong.wang@netronome.com>
Date:   Wed, 19 Dec 2018 17:44:16 -0500
From:   Jiong Wang <jiong.wang@...ronome.com>
To:     ast@...nel.org, daniel@...earbox.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        Jiong Wang <jiong.wang@...ronome.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [PATH bpf-next 09/13] s390: bpf: implement jitting of JMP32

This patch implements code-gen for new JMP32 instructions on s390.

Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Jiong Wang <jiong.wang@...ronome.com>
---
 arch/s390/net/bpf_jit_comp.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 3ff758e..c7101e5 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -1186,21 +1186,25 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i
 		/* lgfi %w1,imm (load sign extend imm) */
 		EMIT6_IMM(0xc0010000, REG_W1, imm);
 		/* cgrj %dst,%w1,mask,off */
-		EMIT6_PCREL(0xec000000, 0x0064, dst_reg, REG_W1, i, off, mask);
+		EMIT6_PCREL(0xec000000, src_reg ? 0x0076 : 0x0064,
+			    dst_reg, REG_W1, i, off, mask);
 		break;
 branch_ku:
 		/* lgfi %w1,imm (load sign extend imm) */
 		EMIT6_IMM(0xc0010000, REG_W1, imm);
 		/* clgrj %dst,%w1,mask,off */
-		EMIT6_PCREL(0xec000000, 0x0065, dst_reg, REG_W1, i, off, mask);
+		EMIT6_PCREL(0xec000000, src_reg ? 0x0077 : 0x0065,
+			    dst_reg, REG_W1, i, off, mask);
 		break;
 branch_xs:
 		/* cgrj %dst,%src,mask,off */
-		EMIT6_PCREL(0xec000000, 0x0064, dst_reg, src_reg, i, off, mask);
+		EMIT6_PCREL(0xec000000, imm ? 0x0076 : 0x0064,
+			    dst_reg, src_reg, i, off, mask);
 		break;
 branch_xu:
 		/* clgrj %dst,%src,mask,off */
-		EMIT6_PCREL(0xec000000, 0x0065, dst_reg, src_reg, i, off, mask);
+		EMIT6_PCREL(0xec000000, imm ? 0x0077 : 0x0065,
+			    dst_reg, src_reg, i, off, mask);
 		break;
 branch_oc:
 		/* brc mask,jmp_off (branch instruction needs 4 bytes) */
-- 
2.7.4