From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: bpf@vger.kernel.org, Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Jiri Olsa <jolsa@kernel.org>, Stanislav Fomichev <sdf@google.com>,
Ilya Leoshkevich <iii@linux.ibm.com>,
"David S . Miller" <davem@davemloft.net>
Subject: [PATCH bpf-next v3 04/12] bpf: sparc64: Emit fixed-length instructions for BPF_PSEUDO_FUNC
Date: Wed, 22 Feb 2023 23:37:06 +0100 [thread overview]
Message-ID: <20230222223714.80671-5-iii@linux.ibm.com> (raw)
In-Reply-To: <20230222223714.80671-1-iii@linux.ibm.com>
This is the same as commit b54b6003612a ("riscv, bpf: Emit fixed-length
instructions for BPF_PSEUDO_FUNC"), but for sparc64. The code sequence
is borrowed from sparc64-linux-gnu-gcc -Os.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
arch/sparc/net/bpf_jit_comp_64.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
index fa0759bfe498..59d2d9953aa7 100644
--- a/arch/sparc/net/bpf_jit_comp_64.c
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -1243,10 +1243,19 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
case BPF_LD | BPF_IMM | BPF_DW:
{
const struct bpf_insn insn1 = insn[1];
+ const u8 tmp = bpf2sparc[TMP_REG_1];
u64 imm64;
- imm64 = (u64)insn1.imm << 32 | (u32)imm;
- emit_loadimm64(imm64, dst, ctx);
+ if (bpf_pseudo_func(insn)) {
+ /* fixed-length insns for extra jit pass */
+ emit_set_const(dst, insn1.imm, ctx);
+ emit_set_const(tmp, imm, ctx);
+ emit_alu_K(SLLX, dst, 32, ctx);
+ emit_alu3(ADD, dst, tmp, dst, ctx);
+ } else {
+ imm64 = (u64)insn1.imm << 32 | (u32)imm;
+ emit_loadimm64(imm64, dst, ctx);
+ }
return 1;
}
--
2.39.1
next prev parent reply other threads:[~2023-02-22 23:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 22:37 [PATCH bpf-next v3 00/12] bpf: Support 64-bit pointers to kfuncs Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 01/12] selftests/bpf: Finish folding after BPF_FUNC_csum_diff Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 02/12] selftests/bpf: Fix test_verifier on 32-bit systems Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 03/12] sparc: Update maximum errno Ilya Leoshkevich
2023-02-22 22:37 ` Ilya Leoshkevich [this message]
2023-02-22 22:37 ` [PATCH bpf-next v3 05/12] bpf: sparc64: Fix jumping to the first insn Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 06/12] bpf: sparc64: Use 32-bit tail call index Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 07/12] bpf, arm: Use bpf_jit_get_func_addr() Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 08/12] bpf: sparc64: " Ilya Leoshkevich
2023-02-23 9:31 ` Jiri Olsa
2023-02-22 22:37 ` [PATCH bpf-next v3 09/12] bpf: x86: " Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 10/12] bpf, x86_32: " Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 11/12] bpf: Support 64-bit pointers to kfuncs Ilya Leoshkevich
2023-02-22 23:43 ` Stanislav Fomichev
2023-02-23 8:39 ` Ilya Leoshkevich
2023-02-22 22:37 ` [PATCH bpf-next v3 12/12] selftests/bpf: Trim DENYLIST.s390x Ilya Leoshkevich
2023-02-23 17:17 ` [PATCH bpf-next v3 00/12] bpf: Support 64-bit pointers to kfuncs Alexei Starovoitov
2023-02-23 20:42 ` Ilya Leoshkevich
2023-02-25 0:02 ` Alexei Starovoitov
2023-02-27 12:36 ` Ilya Leoshkevich
2023-03-28 12:45 ` Jiri Olsa
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