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[93.51.222.138]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b6f306c22sm441197735e9.13.2025.09.05.22.18.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Sep 2025 22:18:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1757135908; x=1757740708; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=tqfT+leZhy7Rg922mo2u8oPpLUYve9eJPBZJd2GWVis=; b=jFhYFvACYCZfmV3WR9gETNsHqGQQGD0iRt0GKkZZa+SRd6sIuKbSYXl1qyg66aK+pK gkTNIxATeWmVvb0oV08PA5hIvBUwsc3qTTpqJWdfppeuaAxc5WGawvu9hpydAdj1F9a7 G5+AZlVEZeJW3G4fpkkMIswgxCcrtOxfvw086KUA/M9dGIcX88kI8YESCii+sJ9tICc9 wfyCKUI/vpwTKZXaodznQlF8VAB7eQhuTSc/G/eA3GOUIwLUDYagadGbVwrDBFdjF1Ug 2VNF/w+7SR7ERlvWagPfzHO1tnCgQlqKjyFNAQP8805mwqV+uqbj2ilQkfHqz8jf5Jf6 erFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757135908; x=1757740708; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=tqfT+leZhy7Rg922mo2u8oPpLUYve9eJPBZJd2GWVis=; b=ZcDQ+v6PU/xG67IarLIDwJ47TBHk4U7h7irPYZhLGIiHGGDDVIk61Wpc+jA8iJ1KeN qh1FwmMXBhy0YzVl99wfezHrWwIwWdukUOWnknIxSpyTwBgL3k8hRpxJ32kT0HCQA/9Z wZFlpbAcvwV+ZwJyT8f/ebwS8Rgva2HdoIaHvqCbU2xyuW5wHRaggsnJiREHtiNizB4W ug4fyr9YhPIDLpBE7NDuYmjZ6NXjR3scylLLo+/GcRkdy33h8LsiFxpC1Jmfj0k4hSSj Cp0C4ar0TzvGF0Mv4s779zFAwyjsfUNa3Pa+/v8UF2D8heVJ/0mIcVPSYRj86szayjBJ VFDw== X-Gm-Message-State: AOJu0Yzl3ItlWCoIA/jAVpcjkYv202slasxqjLkXQsdPAPPvJWhiVXHm 1tRadnlTq5QvFpgbd8XXV7lncBsV0QzM2s+g7nICbFcizO7exk/2Z+JccHxvflmngz85oqeY/6H MEjMerCE= X-Gm-Gg: ASbGncvVawxz55ZRHjingbsBhVjsECN/qYqrB2pytSv3nxkvbm3kZ3vfiVsGvQR2hEw QBx9NdPHznMyDRUESEj/kh7zwjCQJ/rZ6fTlywfKgmamBdZqPMM7Cxp1YSXtTXezKyUT+kHBbTG tsDssQrqdBBpmBNjCC7grbylo8567tqAoVZiJLpVw+Z5EO640BAXK78Ce4Bs5/kt0u38H/typvJ 6Rnkl+S4ACojdgEpKxbFKjcsgTe2I88FDqp/EpZNFT0JPrU71pfWqq2otfrBg5ha/u2gNKWlAEI VVYmTdPW+Isn+T8jY/0Yxa/c9ajzEwWKrc9gHqwL/yr9ut9QL9TtUtUKevv3kYaCjppXWuVxJjP Cxr4eKXPDdwRHLabyUDK3SnOG7FKD3kl8XCzc+I4Lfr/ArdlEwuS1jcHRxMdAjsg6RNu/t7GkDn Rji/jsO8k= X-Google-Smtp-Source: AGHT+IHn8pbOhFCIcFZb74BzVRbNrrbOOP8PeToenFp90YnkTqJiSML0XxFAWQPjl9Y+qZgU/kvILA== X-Received: by 2002:a05:600c:6995:b0:45d:ded8:3b6e with SMTP id 5b1f17b1804b1-45dded83cecmr5669825e9.17.1757135908035; Fri, 05 Sep 2025 22:18:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: alex.bennee@linaro.org, philmd@linaro.org Subject: [PATCH 07/11] linux-user: Use tb_flush_exclusive to start second thread Date: Sat, 6 Sep 2025 07:18:16 +0200 Message-ID: <20250906051820.160432-8-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250906051820.160432-1-richard.henderson@linaro.org> References: <20250906051820.160432-1-richard.henderson@linaro.org> MIME-Version: 1.0 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::332; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x332.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: 1757136070322116600 Content-Type: text/plain; charset="utf-8" When we start the second thread, we discard all translations so that we can re-do them with CF_PARALLEL. Since there is as yet only one cpu, and we are processing a syscall, there are no live translation blocks and we have exclusivity. Signed-off-by: Richard Henderson --- linux-user/mmap.c | 4 ++-- linux-user/syscall.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 002e1e668e..bd2bbaf1f4 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -1010,7 +1010,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, = int target_prot, CPUState *cpu =3D thread_cpu; if (!tcg_cflags_has(cpu, CF_PARALLEL)) { tcg_cflags_set(cpu, CF_PARALLEL); - tb_flush(cpu); + tb_flush__exclusive(); } } =20 @@ -1450,7 +1450,7 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shm= id, */ if (!tcg_cflags_has(cpu, CF_PARALLEL)) { tcg_cflags_set(cpu, CF_PARALLEL); - tb_flush(cpu); + tb_flush__exclusive(); } =20 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 91360a072c..d9c394856f 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6633,7 +6633,7 @@ static int do_fork(CPUArchState *env, unsigned int fl= ags, abi_ulong newsp, */ if (!tcg_cflags_has(cpu, CF_PARALLEL)) { tcg_cflags_set(cpu, CF_PARALLEL); - tb_flush(cpu); + tb_flush__exclusive(); } =20 /* we create a new CPU instance. */ --=20 2.43.0