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Tue, 27 Feb 2024 06:43:51 -0800 (PST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, Yoshinori Sato , qemu-arm@nongnu.org, Liu Zhiwei , Michael Rolnik , Yanan Wang , Eduardo Habkost , Wainer dos Santos Moschetta , Beraldo Leal , Cleber Rosa , David Hildenbrand , Paolo Bonzini , Peter Maydell , Song Gao , Daniel Henrique Barboza , Laurent Vivier , Warner Losh , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Alexandre Iooss , Ilya Leoshkevich , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-s390x@nongnu.org, Kyle Evans , Brad Smith , Nicholas Piggin , "Edgar E. Iglesias" , Pierrick Bouvier , John Snow , Alistair Francis , Richard Henderson , Brian Cain , Thomas Huth , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-riscv@nongnu.org, Bin Meng , Daniel Henrique Barboza , Weiwei Li , Marcel Apfelbaum , Palmer Dabbelt , Mahmoud Mandour Subject: [PATCH v4 16/29] plugins: add qemu_plugin_num_vcpus function Date: Tue, 27 Feb 2024 14:43:22 +0000 Message-Id: <20240227144335.1196131-17-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240227144335.1196131-1-alex.bennee@linaro.org> References: <20240227144335.1196131-1-alex.bennee@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=2a00:1450:4864:20::435; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x435.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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: 1709045328525100003 From: Pierrick Bouvier We now keep track of how many vcpus were started. This way, a plugin can easily query number of any vcpus at any point of execution, which unifies user and system mode workflows. Signed-off-by: Pierrick Bouvier Reviewed-by: Richard Henderson Message-Id: <20240213094009.150349-3-pierrick.bouvier@linaro.org> Signed-off-by: Alex Benn=C3=A9e --- include/qemu/qemu-plugin.h | 3 +++ plugins/plugin.h | 4 ++++ plugins/api.c | 5 +++++ plugins/core.c | 6 ++++++ plugins/qemu-plugins.symbols | 1 + 5 files changed, 19 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index e45181c793c..93981f8f89f 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -645,6 +645,9 @@ QEMU_PLUGIN_API void qemu_plugin_register_atexit_cb(qemu_plugin_id_t id, qemu_plugin_udata_cb_t cb, void *userd= ata); =20 +/* returns how many vcpus were started at this point */ +int qemu_plugin_num_vcpus(void); + /** * qemu_plugin_outs() - output string via QEMU's logging system * @string: a string diff --git a/plugins/plugin.h b/plugins/plugin.h index 90f3f324ab6..00b3509f708 100644 --- a/plugins/plugin.h +++ b/plugins/plugin.h @@ -44,6 +44,8 @@ struct qemu_plugin_state { * the code cache is flushed. */ struct qht dyn_cb_arr_ht; + /* How many vcpus were started */ + int num_vcpus; }; =20 =20 @@ -97,4 +99,6 @@ void plugin_register_vcpu_mem_cb(GArray **arr, =20 void exec_inline_op(struct qemu_plugin_dyn_cb *cb); =20 +int plugin_num_vcpus(void); + #endif /* PLUGIN_H */ diff --git a/plugins/api.c b/plugins/api.c index 2926b1961a8..116b8bd603c 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -342,6 +342,11 @@ const char *qemu_plugin_hwaddr_device_name(const struc= t qemu_plugin_hwaddr *h) #endif } =20 +int qemu_plugin_num_vcpus(void) +{ + return plugin_num_vcpus(); +} + /* * Plugin output */ diff --git a/plugins/core.c b/plugins/core.c index ee2fa41af9e..caa66311351 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -213,6 +213,7 @@ void qemu_plugin_vcpu_init_hook(CPUState *cpu) bool success; =20 qemu_rec_mutex_lock(&plugin.lock); + plugin.num_vcpus =3D MAX(plugin.num_vcpus, cpu->cpu_index + 1); plugin_cpu_update__locked(&cpu->cpu_index, NULL, NULL); success =3D g_hash_table_insert(plugin.cpu_ht, &cpu->cpu_index, &cpu->cpu_index); @@ -570,3 +571,8 @@ static void __attribute__((__constructor__)) plugin_ini= t(void) QHT_MODE_AUTO_RESIZE); atexit(qemu_plugin_atexit_cb); } + +int plugin_num_vcpus(void) +{ + return plugin.num_vcpus; +} diff --git a/plugins/qemu-plugins.symbols b/plugins/qemu-plugins.symbols index ca806000d54..adb67608598 100644 --- a/plugins/qemu-plugins.symbols +++ b/plugins/qemu-plugins.symbols @@ -16,6 +16,7 @@ qemu_plugin_mem_is_sign_extended; qemu_plugin_mem_is_store; qemu_plugin_mem_size_shift; + qemu_plugin_num_vcpus; qemu_plugin_outs; qemu_plugin_path_to_binary; qemu_plugin_register_atexit_cb; --=20 2.39.2