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From: Jiong Wang <jiong.wang@netronome.com>
To: alexei.starovoitov@gmail.com, daniel@iogearbox.net
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	oss-drivers@netronome.com, Jiong Wang <jiong.wang@netronome.com>,
	"David S . Miller" <davem@davemloft.net>
Subject: [PATCH v6 bpf-next 14/17] sparc: bpf: eliminate zero extension code-gen
Date: Fri,  3 May 2019 11:42:41 +0100	[thread overview]
Message-ID: <1556880164-10689-15-git-send-email-jiong.wang@netronome.com> (raw)
In-Reply-To: <1556880164-10689-1-git-send-email-jiong.wang@netronome.com>

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
---
 arch/sparc/net/bpf_jit_comp_64.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
index 65428e7..8bac761 100644
--- a/arch/sparc/net/bpf_jit_comp_64.c
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -905,6 +905,10 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 		ctx->saw_frame_pointer = true;
 
 	switch (code) {
+	/* dst = (u32) dst */
+	case BPF_ALU | BPF_ZEXT:
+		emit_alu_K(SRL, dst, 0, ctx);
+		break;
 	/* dst = src */
 	case BPF_ALU | BPF_MOV | BPF_X:
 		emit_alu3_K(SRL, src, 0, dst, ctx);
@@ -1144,7 +1148,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 		break;
 
 	do_alu32_trunc:
-		if (BPF_CLASS(code) == BPF_ALU)
+		if (BPF_CLASS(code) == BPF_ALU &&
+		    !ctx->prog->aux->verifier_zext)
 			emit_alu_K(SRL, dst, 0, ctx);
 		break;
 
@@ -1432,6 +1437,11 @@ static void jit_fill_hole(void *area, unsigned int size)
 		*ptr++ = 0x91d02005; /* ta 5 */
 }
 
+bool bpf_jit_hardware_zext(void)
+{
+	return false;
+}
+
 struct sparc64_jit_data {
 	struct bpf_binary_header *header;
 	u8 *image;
-- 
2.7.4


  parent reply	other threads:[~2019-05-03 10:44 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-03 10:42 [PATCH v6 bpf-next 00/17] bpf: eliminate zero extensions for sub-register writes Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 01/17] bpf: verifier: offer more accurate helper function arg and return type Jiong Wang
2019-05-06 13:57   ` Daniel Borkmann
2019-05-06 22:25     ` Jiong Wang
2019-05-08 11:12       ` Jiong Wang
2019-05-06 15:50   ` Alexei Starovoitov
2019-05-08 14:45     ` Jiong Wang
2019-05-08 17:51       ` Alexei Starovoitov
2019-05-09 12:32         ` Jiong Wang
2019-05-09 17:31           ` Jiong Wang
2019-05-10  1:53           ` Alexei Starovoitov
2019-05-10  8:30             ` Jiong Wang
2019-05-10 20:10               ` Alexei Starovoitov
2019-05-10 21:59                 ` Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 02/17] bpf: verifier: mark verified-insn with sub-register zext flag Jiong Wang
2019-05-06 13:49   ` Daniel Borkmann
2019-05-06 14:49     ` Daniel Borkmann
2019-05-06 22:14     ` Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 03/17] bpf: verifier: mark patched-insn " Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 04/17] bpf: introduce new alu insn BPF_ZEXT for explicit zero extension Jiong Wang
2019-05-06 15:57   ` Alexei Starovoitov
2019-05-06 23:19     ` Jiong Wang
2019-05-07  4:29       ` Jiong Wang
2019-05-07  4:40         ` Alexei Starovoitov
2019-05-03 10:42 ` [PATCH v6 bpf-next 05/17] bpf: verifier: insert BPF_ZEXT according to zext analysis result Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 06/17] bpf: introduce new bpf prog load flags "BPF_F_TEST_RND_HI32" Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 07/17] bpf: verifier: randomize high 32-bit when BPF_F_TEST_RND_HI32 is set Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 08/17] libbpf: add "prog_flags" to bpf_program/bpf_prog_load_attr/bpf_load_program_attr Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 09/17] selftests: bpf: adjust several test_verifier helpers for insn insertion Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 10/17] selftests: bpf: enable hi32 randomization for all tests Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 11/17] arm: bpf: eliminate zero extension code-gen Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 12/17] powerpc: " Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 13/17] s390: " Jiong Wang
2019-05-03 13:41   ` Heiko Carstens
2019-05-03 13:50     ` Eric Dumazet
2019-05-03 14:09     ` Jiong Wang
2019-05-03 10:42 ` Jiong Wang [this message]
2019-05-03 10:42 ` [PATCH v6 bpf-next 15/17] x32: " Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 16/17] riscv: " Jiong Wang
2019-05-03 10:42 ` [PATCH v6 bpf-next 17/17] nfp: " Jiong Wang

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