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Date: Tue, 19 Sep 2023 11:58:35 +0800
From: Pu Lehui <pulehui@...weicloud.com>
To: bpf@...r.kernel.org,
linux-riscv@...ts.infradead.org,
netdev@...r.kernel.org
Cc: Björn Töpel <bjorn@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <martin.lau@...ux.dev>,
Song Liu <song@...nel.org>,
Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
Stanislav Fomichev <sdf@...gle.com>,
Hao Luo <haoluo@...gle.com>,
Jiri Olsa <jolsa@...nel.org>,
Palmer Dabbelt <palmer@...belt.com>,
Conor Dooley <conor@...nel.org>,
Luke Nelson <luke.r.nels@...il.com>,
Pu Lehui <pulehui@...wei.com>,
Pu Lehui <pulehui@...weicloud.com>
Subject: [PATCH bpf-next v2 2/6] riscv, bpf: Unify 32-bit zero-extension to emit_zextw
From: Pu Lehui <pulehui@...wei.com>
For code unification, add emit_zextw wrapper to unify all the 32-bit
zero-extension operations.
Signed-off-by: Pu Lehui <pulehui@...wei.com>
---
arch/riscv/net/bpf_jit.h | 6 +++
arch/riscv/net/bpf_jit_comp64.c | 80 +++++++++++++++------------------
2 files changed, 43 insertions(+), 43 deletions(-)
diff --git a/arch/riscv/net/bpf_jit.h b/arch/riscv/net/bpf_jit.h
index 03a6ecb43..8e0ef4d08 100644
--- a/arch/riscv/net/bpf_jit.h
+++ b/arch/riscv/net/bpf_jit.h
@@ -1089,6 +1089,12 @@ static inline void emit_sextw(u8 rd, u8 rs, struct rv_jit_context *ctx)
emit_addiw(rd, rs, 0, ctx);
}
+static inline void emit_zextw(u8 rd, u8 rs, struct rv_jit_context *ctx)
+{
+ emit_slli(rd, rs, 32, ctx);
+ emit_srli(rd, rd, 32, ctx);
+}
+
#endif /* __riscv_xlen == 64 */
void bpf_jit_build_prologue(struct rv_jit_context *ctx);
diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index 8b654c0cf..4a649e195 100644
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -322,12 +322,6 @@ static void emit_branch(u8 cond, u8 rd, u8 rs, int rvoff,
emit(rv_jalr(RV_REG_ZERO, RV_REG_T1, lower), ctx);
}
-static void emit_zext_32(u8 reg, struct rv_jit_context *ctx)
-{
- emit_slli(reg, reg, 32, ctx);
- emit_srli(reg, reg, 32, ctx);
-}
-
static int emit_bpf_tail_call(int insn, struct rv_jit_context *ctx)
{
int tc_ninsn, off, start_insn = ctx->ninsns;
@@ -342,7 +336,7 @@ static int emit_bpf_tail_call(int insn, struct rv_jit_context *ctx)
*/
tc_ninsn = insn ? ctx->offset[insn] - ctx->offset[insn - 1] :
ctx->offset[0];
- emit_zext_32(RV_REG_A2, ctx);
+ emit_zextw(RV_REG_A2, RV_REG_A2, ctx);
off = offsetof(struct bpf_array, map.max_entries);
if (is_12b_check(off, insn))
@@ -404,9 +398,9 @@ static void init_regs(u8 *rd, u8 *rs, const struct bpf_insn *insn,
static void emit_zext_32_rd_rs(u8 *rd, u8 *rs, struct rv_jit_context *ctx)
{
emit_mv(RV_REG_T2, *rd, ctx);
- emit_zext_32(RV_REG_T2, ctx);
+ emit_zextw(RV_REG_T2, RV_REG_T2, ctx);
emit_mv(RV_REG_T1, *rs, ctx);
- emit_zext_32(RV_REG_T1, ctx);
+ emit_zextw(RV_REG_T1, RV_REG_T1, ctx);
*rd = RV_REG_T2;
*rs = RV_REG_T1;
}
@@ -422,8 +416,8 @@ static void emit_sext_32_rd_rs(u8 *rd, u8 *rs, struct rv_jit_context *ctx)
static void emit_zext_32_rd_t1(u8 *rd, struct rv_jit_context *ctx)
{
emit_mv(RV_REG_T2, *rd, ctx);
- emit_zext_32(RV_REG_T2, ctx);
- emit_zext_32(RV_REG_T1, ctx);
+ emit_zextw(RV_REG_T2, RV_REG_T2, ctx);
+ emit_zextw(RV_REG_T1, RV_REG_T2, ctx);
*rd = RV_REG_T2;
}
@@ -511,32 +505,32 @@ static void emit_atomic(u8 rd, u8 rs, s16 off, s32 imm, bool is64,
emit(is64 ? rv_amoadd_d(rs, rs, rd, 0, 0) :
rv_amoadd_w(rs, rs, rd, 0, 0), ctx);
if (!is64)
- emit_zext_32(rs, ctx);
+ emit_zextw(rs, rs, ctx);
break;
case BPF_AND | BPF_FETCH:
emit(is64 ? rv_amoand_d(rs, rs, rd, 0, 0) :
rv_amoand_w(rs, rs, rd, 0, 0), ctx);
if (!is64)
- emit_zext_32(rs, ctx);
+ emit_zextw(rs, rs, ctx);
break;
case BPF_OR | BPF_FETCH:
emit(is64 ? rv_amoor_d(rs, rs, rd, 0, 0) :
rv_amoor_w(rs, rs, rd, 0, 0), ctx);
if (!is64)
- emit_zext_32(rs, ctx);
+ emit_zextw(rs, rs, ctx);
break;
case BPF_XOR | BPF_FETCH:
emit(is64 ? rv_amoxor_d(rs, rs, rd, 0, 0) :
rv_amoxor_w(rs, rs, rd, 0, 0), ctx);
if (!is64)
- emit_zext_32(rs, ctx);
+ emit_zextw(rs, rs, ctx);
break;
/* src_reg = atomic_xchg(dst_reg + off16, src_reg); */
case BPF_XCHG:
emit(is64 ? rv_amoswap_d(rs, rs, rd, 0, 0) :
rv_amoswap_w(rs, rs, rd, 0, 0), ctx);
if (!is64)
- emit_zext_32(rs, ctx);
+ emit_zextw(rs, rs, ctx);
break;
/* r0 = atomic_cmpxchg(dst_reg + off16, r0, src_reg); */
case BPF_CMPXCHG:
@@ -1044,7 +1038,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
case BPF_ALU64 | BPF_MOV | BPF_X:
if (imm == 1) {
/* Special mov32 for zext */
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
}
switch (insn->off) {
@@ -1061,7 +1055,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
break;
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
/* dst = dst OP src */
@@ -1069,7 +1063,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
case BPF_ALU64 | BPF_ADD | BPF_X:
emit_add(rd, rd, rs, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_SUB | BPF_X:
case BPF_ALU64 | BPF_SUB | BPF_X:
@@ -1079,31 +1073,31 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_subw(rd, rd, rs, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_AND | BPF_X:
case BPF_ALU64 | BPF_AND | BPF_X:
emit_and(rd, rd, rs, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_OR | BPF_X:
case BPF_ALU64 | BPF_OR | BPF_X:
emit_or(rd, rd, rs, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_XOR | BPF_X:
case BPF_ALU64 | BPF_XOR | BPF_X:
emit_xor(rd, rd, rs, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_MUL | BPF_X:
case BPF_ALU64 | BPF_MUL | BPF_X:
emit(is64 ? rv_mul(rd, rd, rs) : rv_mulw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_DIV | BPF_X:
case BPF_ALU64 | BPF_DIV | BPF_X:
@@ -1112,7 +1106,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
else
emit(is64 ? rv_divu(rd, rd, rs) : rv_divuw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_MOD | BPF_X:
case BPF_ALU64 | BPF_MOD | BPF_X:
@@ -1121,25 +1115,25 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
else
emit(is64 ? rv_remu(rd, rd, rs) : rv_remuw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_LSH | BPF_X:
case BPF_ALU64 | BPF_LSH | BPF_X:
emit(is64 ? rv_sll(rd, rd, rs) : rv_sllw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_RSH | BPF_X:
case BPF_ALU64 | BPF_RSH | BPF_X:
emit(is64 ? rv_srl(rd, rd, rs) : rv_srlw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_ARSH | BPF_X:
case BPF_ALU64 | BPF_ARSH | BPF_X:
emit(is64 ? rv_sra(rd, rd, rs) : rv_sraw(rd, rd, rs), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
/* dst = -dst */
@@ -1147,7 +1141,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
case BPF_ALU64 | BPF_NEG:
emit_sub(rd, RV_REG_ZERO, rd, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
/* dst = BSWAP##imm(dst) */
@@ -1159,7 +1153,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
break;
case 32:
if (!aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case 64:
/* Do nothing */
@@ -1221,7 +1215,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
case BPF_ALU64 | BPF_MOV | BPF_K:
emit_imm(rd, imm, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
/* dst = dst OP imm */
@@ -1234,7 +1228,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_add(rd, rd, RV_REG_T1, ctx);
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_SUB | BPF_K:
case BPF_ALU64 | BPF_SUB | BPF_K:
@@ -1245,7 +1239,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_sub(rd, rd, RV_REG_T1, ctx);
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_AND | BPF_K:
case BPF_ALU64 | BPF_AND | BPF_K:
@@ -1256,7 +1250,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_and(rd, rd, RV_REG_T1, ctx);
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_OR | BPF_K:
case BPF_ALU64 | BPF_OR | BPF_K:
@@ -1267,7 +1261,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_or(rd, rd, RV_REG_T1, ctx);
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_XOR | BPF_K:
case BPF_ALU64 | BPF_XOR | BPF_K:
@@ -1278,7 +1272,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_xor(rd, rd, RV_REG_T1, ctx);
}
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_MUL | BPF_K:
case BPF_ALU64 | BPF_MUL | BPF_K:
@@ -1286,7 +1280,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit(is64 ? rv_mul(rd, rd, RV_REG_T1) :
rv_mulw(rd, rd, RV_REG_T1), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_DIV | BPF_K:
case BPF_ALU64 | BPF_DIV | BPF_K:
@@ -1298,7 +1292,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit(is64 ? rv_divu(rd, rd, RV_REG_T1) :
rv_divuw(rd, rd, RV_REG_T1), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_MOD | BPF_K:
case BPF_ALU64 | BPF_MOD | BPF_K:
@@ -1310,14 +1304,14 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit(is64 ? rv_remu(rd, rd, RV_REG_T1) :
rv_remuw(rd, rd, RV_REG_T1), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_LSH | BPF_K:
case BPF_ALU64 | BPF_LSH | BPF_K:
emit_slli(rd, rd, imm, ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_RSH | BPF_K:
case BPF_ALU64 | BPF_RSH | BPF_K:
@@ -1327,7 +1321,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit(rv_srliw(rd, rd, imm), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
case BPF_ALU | BPF_ARSH | BPF_K:
case BPF_ALU64 | BPF_ARSH | BPF_K:
@@ -1337,7 +1331,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit(rv_sraiw(rd, rd, imm), ctx);
if (!is64 && !aux->verifier_zext)
- emit_zext_32(rd, ctx);
+ emit_zextw(rd, rd, ctx);
break;
/* JUMP off */
--
2.25.1
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