From nobody Thu Dec 18 13:30:02 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1623455245; cv=none; d=zohomail.com; s=zohoarc; b=k77yKoA2E3fSyDc6hB0iUSfWQPvMeowvBROwHSHAN3pkVw2UpdqS2URcTHAggbweUJ3CVh0kHnBQ3ISL7oosKNEQMCzOb2gSkoSomOPj0KoQzcI3cGHQlskw8tKA3Lz8I7ApLU1RIi/NlViZx1tz9/dvJv3V2IkrcFEfD+v51IU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1623455245; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=UGCE0hBuujlu+HiYuNrthLkWxka9AZtIh3/7kEDtjdA=; b=PyJwz7cJjBci5H9F+o1lWMRrjlGKvq8iq+u7fSI3idKcbV/KMw+8vUTMS2Kp+Tco+rlzeRuaFpQxGdl5TeD+QGawygEsii6e7Wa0CG8ENbJmbvxeolQHF4Pg9zFL7hQgKHbX4xB5XZrhqDZOfFiCZwCQF/f1un6bkp6Sz5NjutQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1623455245801710.536292508967; Fri, 11 Jun 2021 16:47:25 -0700 (PDT) Received: from localhost ([::1]:35602 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lrqs0-0004dL-ON for importer@patchew.org; Fri, 11 Jun 2021 19:47:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47044) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrqme-0002Lj-04 for qemu-devel@nongnu.org; Fri, 11 Jun 2021 19:41:52 -0400 Received: from mail-pg1-x529.google.com ([2607:f8b0:4864:20::529]:38435) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lrqmc-0002Zu-6n for qemu-devel@nongnu.org; Fri, 11 Jun 2021 19:41:51 -0400 Received: by mail-pg1-x529.google.com with SMTP id t17so3679517pga.5 for ; Fri, 11 Jun 2021 16:41:49 -0700 (PDT) Received: from localhost.localdomain (174-21-70-228.tukw.qwest.net. [174.21.70.228]) by smtp.gmail.com with ESMTPSA id q23sm6139829pgm.31.2021.06.11.16.41.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Jun 2021 16:41:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=UGCE0hBuujlu+HiYuNrthLkWxka9AZtIh3/7kEDtjdA=; b=i1NngS7b7TVu0uaIggAkqclZ4+BbnJ1A3bvlRY5SD+J8SE5JgHNndSGA/RqZ9ZvSwa 4uke/wDxu1SAHz77wxLCf/ysnwQ4PLcTrHmaYxkYEMINfxtMom5ASUJlw+GgWc0Yd8Jo iOJs9BNVCdF5f1MFGWeWsCKzFeVmKBHumQSuE52Icl3KSHVtwDsw/f2tqfyDlSbjV2sk 1aFGkIoVRwVFugX+8OF6E66ts6m6NfdcUG5eO7WYpMHSAp2qltK3uqPd270+7tdNYHpG Vhdg0vBsH+2ef9YJBZNX/cDM7PK2ayA20+RTO4Pg75N8a9iIb7fvkY1E3tK51UkGZ/yP u4Aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=UGCE0hBuujlu+HiYuNrthLkWxka9AZtIh3/7kEDtjdA=; b=XjTlnxCuYJoJM1iaPuvG+EQmd+Qlm1u3Y3PDrsOnFgc8gU43EDvUwAaHUhzxQzpC8G INxZfRDDFeGygfZhCAm10tbbB/mT8o+8SWEuAwr/CUs0vVcd00c/RvyBpltDcRKHXc5R OBD437658PhTzPgdpakwS959nJiMHlAiXVYEAFeXylpigKH/rCh+kK+//cTUUn3EwkWP 5AMAzhcgBUBLK7nTKADPIMy1DQWV2OmZo7TyddQVThd4MAo1HVvuGR5hS6D8m3TiUVE9 h1XBC9j2WrEim3TxNwIBQ1yI156kJbyh3KDYVUuOOQjmxqlEIzP5X3FrVQ/XjNxvAqsQ JSlA== X-Gm-Message-State: AOAM531YADv5NM70H7YnmY1dxcsJ8B4djVPsCBBXXMJDrLJGsZURvdkr MJZ1uuZv+SH0SzWsANFDyt8axEW0PEGmww== X-Google-Smtp-Source: ABdhPJwLAwrxIaqvPEceWX9ZrW/32GQJA6KBY13q5+Vb8a+oHuTO3JWrwXmzFMISxZzGneaZBxetrA== X-Received: by 2002:a63:e0e:: with SMTP id d14mr5877297pgl.426.1623454909009; Fri, 11 Jun 2021 16:41:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 06/34] tcg: Split out tcg_region_prologue_set Date: Fri, 11 Jun 2021 16:41:16 -0700 Message-Id: <20210611234144.653682-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210611234144.653682-1-richard.henderson@linaro.org> References: <20210611234144.653682-1-richard.henderson@linaro.org> 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=2607:f8b0:4864:20::529; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x529.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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Luis Pires , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) This has only one user, but will make more sense after some code motion. Always leave the tcg_init_ctx initialized to the first region, in preparation for tcg_prologue_init(). This also requires that we don't re-allocate the region for the first cpu, lest we hit the assertion for total number of regions allocated . Reviewed-by: Luis Pires Reviewed-by: Alex Benn=C3=A9e Signed-off-by: Richard Henderson --- tcg/tcg.c | 37 ++++++++++++++++++++++--------------- 1 file changed, 22 insertions(+), 15 deletions(-) diff --git a/tcg/tcg.c b/tcg/tcg.c index 36ea21d596..eca72990c1 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -882,10 +882,26 @@ void tcg_region_init(void) =20 tcg_region_trees_init(); =20 - /* In user-mode we support only one ctx, so do the initial allocation = now */ -#ifdef CONFIG_USER_ONLY - tcg_region_initial_alloc__locked(tcg_ctx); -#endif + /* + * Leave the initial context initialized to the first region. + * This will be the context into which we generate the prologue. + * It is also the only context for CONFIG_USER_ONLY. + */ + tcg_region_initial_alloc__locked(&tcg_init_ctx); +} + +static void tcg_region_prologue_set(TCGContext *s) +{ + /* Deduct the prologue from the first region. */ + g_assert(region.start =3D=3D s->code_gen_buffer); + region.start =3D s->code_ptr; + + /* Recompute boundaries of the first region. */ + tcg_region_assign(s, 0); + + /* Register the balance of the buffer with gdb. */ + tcg_register_jit(tcg_splitwx_to_rx(region.start), + region.end - region.start); } =20 #ifdef CONFIG_DEBUG_TCG @@ -965,10 +981,10 @@ void tcg_register_thread(void) =20 if (n > 0) { alloc_tcg_plugin_context(s); + tcg_region_initial_alloc(s); } =20 tcg_ctx =3D s; - tcg_region_initial_alloc(s); } #endif /* !CONFIG_USER_ONLY */ =20 @@ -1208,8 +1224,6 @@ void tcg_prologue_init(TCGContext *s) { size_t prologue_size; =20 - /* Put the prologue at the beginning of code_gen_buffer. */ - tcg_region_assign(s, 0); s->code_ptr =3D s->code_gen_ptr; s->code_buf =3D s->code_gen_ptr; s->data_gen_ptr =3D NULL; @@ -1241,14 +1255,7 @@ void tcg_prologue_init(TCGContext *s) (uintptr_t)s->code_buf, prologue_size); #endif =20 - /* Deduct the prologue from the first region. */ - region.start =3D s->code_ptr; - - /* Recompute boundaries of the first region. */ - tcg_region_assign(s, 0); - - tcg_register_jit(tcg_splitwx_to_rx(region.start), - region.end - region.start); + tcg_region_prologue_set(s); =20 #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) { --=20 2.25.1