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Wed, 18 Dec 2024 07:41:47 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, qemu-s390x@nongnu.org, Paolo Bonzini , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH] accel/tcg: Un-inline translator_is_same_page() Date: Wed, 18 Dec 2024 16:41:45 +0100 Message-ID: <20241218154145.71353-1-philmd@linaro.org> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::436; envelope-from=philmd@linaro.org; helo=mail-wr1-x436.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1734536574772116600 Remove the single target-specific definition used in "exec/translator.h" (TARGET_PAGE_MASK) by un-inlining is_same_page(). Rename the method as translator_is_same_page() and improve its documentation. Use it in translator_use_goto_tb(). Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson --- Richard, I'll merge this myself once reviewed. --- include/exec/translator.h | 15 +++++++-------- accel/tcg/translator.c | 7 ++++++- target/i386/tcg/translate.c | 6 +++--- target/riscv/translate.c | 4 ++-- target/s390x/tcg/translate.c | 4 ++-- 5 files changed, 20 insertions(+), 16 deletions(-) diff --git a/include/exec/translator.h b/include/exec/translator.h index d8dcb77b5f4..41e2a41180f 100644 --- a/include/exec/translator.h +++ b/include/exec/translator.h @@ -267,16 +267,15 @@ bool translator_st(const DisasContextBase *db, void *= dest, */ size_t translator_st_len(const DisasContextBase *db); =20 -#ifdef COMPILING_PER_TARGET -/* - * Return whether addr is on the same page as where disassembly started. +/** + * translator_is_same_page + * @db: disassembly context + * @addr: virtual address within TB + * + * Return whether @addr is on the same page as where disassembly started. * Translators can use this to enforce the rule that only single-insn * translation blocks are allowed to cross page boundaries. */ -static inline bool is_same_page(const DisasContextBase *db, vaddr addr) -{ - return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) =3D=3D 0; -} -#endif +bool translator_is_same_page(const DisasContextBase *db, vaddr addr); =20 #endif /* EXEC__TRANSLATOR_H */ diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c index ce5eae4349e..ef1538b4fcd 100644 --- a/accel/tcg/translator.c +++ b/accel/tcg/translator.c @@ -104,6 +104,11 @@ static void gen_tb_end(const TranslationBlock *tb, uin= t32_t cflags, } } =20 +bool translator_is_same_page(const DisasContextBase *db, vaddr addr) +{ + return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) =3D=3D 0; +} + bool translator_use_goto_tb(DisasContextBase *db, vaddr dest) { /* Suppress goto_tb if requested. */ @@ -112,7 +117,7 @@ bool translator_use_goto_tb(DisasContextBase *db, vaddr= dest) } =20 /* Check for the dest on the same page as the start of the TB. */ - return ((db->pc_first ^ dest) & TARGET_PAGE_MASK) =3D=3D 0; + return translator_is_same_page(db, dest); } =20 void translator_loop(CPUState *cpu, TranslationBlock *tb, int *max_insns, diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 5d729e68c98..42fe5d285e4 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -1511,7 +1511,7 @@ static uint64_t advance_pc(CPUX86State *env, DisasCon= text *s, int num_bytes) =20 /* This is a subsequent insn that crosses a page boundary. */ if (s->base.num_insns > 1 && - !is_same_page(&s->base, s->pc + num_bytes - 1)) { + !translator_is_same_page(&s->base, s->pc + num_bytes - 1)) { siglongjmp(s->jmpbuf, 2); } =20 @@ -2225,7 +2225,7 @@ static void gen_jmp_rel(DisasContext *s, MemOp ot, in= t diff, int tb_num) * no extra masking to apply (data16 branch in code32, see above), * then we have also proven that the addition does not wrap. */ - if (!use_goto_tb || !is_same_page(&s->base, new_pc)) { + if (!use_goto_tb || !translator_is_same_page(&s->base, new_pc)) { tcg_gen_andi_tl(cpu_eip, cpu_eip, mask); use_goto_tb =3D false; } @@ -3762,7 +3762,7 @@ static void i386_tr_translate_insn(DisasContextBase *= dcbase, CPUState *cpu) * chance to happen. */ dc->base.is_jmp =3D DISAS_EOB_NEXT; - } else if (!is_same_page(&dc->base, dc->base.pc_next)) { + } else if (!translator_is_same_page(&dc->base, dc->base.pc_next)) { dc->base.is_jmp =3D DISAS_TOO_MANY; } } diff --git a/target/riscv/translate.c b/target/riscv/translate.c index bccaf8e89a6..cf48cca7132 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1304,7 +1304,7 @@ static void riscv_tr_translate_insn(DisasContextBase = *dcbase, CPUState *cpu) =20 /* Only the first insn within a TB is allowed to cross a page boundary= . */ if (ctx->base.is_jmp =3D=3D DISAS_NEXT) { - if (ctx->itrigger || !is_same_page(&ctx->base, ctx->base.pc_next))= { + if (ctx->itrigger || !translator_is_same_page(&ctx->base, ctx->bas= e.pc_next)) { ctx->base.is_jmp =3D DISAS_TOO_MANY; } else { unsigned page_ofs =3D ctx->base.pc_next & ~TARGET_PAGE_MASK; @@ -1314,7 +1314,7 @@ static void riscv_tr_translate_insn(DisasContextBase = *dcbase, CPUState *cpu) translator_lduw(env, &ctx->base, ctx->base.pc_next); int len =3D insn_len(next_insn); =20 - if (!is_same_page(&ctx->base, ctx->base.pc_next + len - 1)= ) { + if (!translator_is_same_page(&ctx->base, ctx->base.pc_next= + len - 1)) { ctx->base.is_jmp =3D DISAS_TOO_MANY; } } diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index bcfff40b255..8a3798f9dff 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -6422,8 +6422,8 @@ static void s390x_tr_translate_insn(DisasContextBase = *dcbase, CPUState *cs) dc->base.is_jmp =3D translate_one(env, dc); if (dc->base.is_jmp =3D=3D DISAS_NEXT) { if (dc->ex_value || - !is_same_page(dcbase, dc->base.pc_next) || - !is_same_page(dcbase, get_next_pc(env, dc, dc->base.pc_next)))= { + !translator_is_same_page(dcbase, dc->base.pc_next) || + !translator_is_same_page(dcbase, get_next_pc(env, dc, dc->base= .pc_next))) { dc->base.is_jmp =3D DISAS_TOO_MANY; } } --=20 2.45.2