From patchwork Fri Feb 16 16:30:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 13560294 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 57AF1C48260 for ; Fri, 16 Feb 2024 16:33:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rb17J-000538-PB; Fri, 16 Feb 2024 11:31:13 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rb178-0004rw-2t for qemu-devel@nongnu.org; Fri, 16 Feb 2024 11:31:04 -0500 Received: from mail-wm1-x32b.google.com ([2a00:1450:4864:20::32b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rb16m-0002G8-DJ for qemu-devel@nongnu.org; Fri, 16 Feb 2024 11:31:01 -0500 Received: by mail-wm1-x32b.google.com with SMTP id 5b1f17b1804b1-41244cc3d67so6044545e9.2 for ; Fri, 16 Feb 2024 08:30:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708101039; x=1708705839; 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=O9WREwsMrt85roF9DpcRAV7U4Bq5TV/wSmpsUdovSGg=; b=l4+Y5CZloaevBoepk4VwH/cDgOY0nWHE0k9EmTIrmNjhfUJXAb+ZwC+RXZE18bUOWA Fc54PZgp7R79d2L5xsbNnj4n7ewE2+F8hWaSnJAzXVndiSgnZgXX/f4Fx2btQtaxqdpT o74paxbqKo8AM6EdBT+eHfmoW8883gzf9kFgpcmkZ4k70Ajukaew6oNs8NdRsXsS++fZ e3nVl4QyD/vnL5Zu2uwnXNK7dKVYA9QijSyoqueIkf1J/VE6MJLCJLKngVOfCYEIfGE/ qs+KlOJdBzfMVAvHnkFMpSTheaxLCht88byKo6cTv4ajshqMbZj2aKZDhZ8hzAdCBZRT 0i5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708101039; x=1708705839; 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=O9WREwsMrt85roF9DpcRAV7U4Bq5TV/wSmpsUdovSGg=; b=DDpFT58BU6s2PNmtasgIeKpIZ8P3l5zcP8a6akS+pHzJtATtoqhCP6q2KdhBHkJ+Ll vtsJLnG/PmaJmzGmNUycPren/Uvmz6uiF1z7OomdXOuSi7QVXyWuzqUWs6NEALsB7asB KM2O7q2uQt6RSDaGA0emnbIabDSYFFkf2fsPR2JBEJWqQB+97i/S21JDbbbUBqToszBS +20+84rCYIaN4G8ahd3vsqey7gifpXWFJLHORcsW9eYVJLz3sW2mGwALmclGbiECn5Ep uUWaN28CezHNrKfP9oIwW0yNgpnoupG0W4SRat7qDhaGXyfCdlv9xGGxYgydMtQ52b0+ k0Cg== X-Gm-Message-State: AOJu0YxWp2sYMnFvjEsD+ZObHFPvF2dMR3Jzk7erd3P2llrTQZxC2T85 aTUiY48rDws1JDVV3zx9bXloKZ+bN1DEXjbFHG7bzmWtj0KI/P4kCI3SS0VqMPA= X-Google-Smtp-Source: AGHT+IFLIbtAa0c9RNa/u/6gGY87Xq8Y0z3xpX0SDTf4Ogo77+0XcqOZxX9qWtU5mITWFkzmTyq8Ag== X-Received: by 2002:adf:ee8b:0:b0:33d:174b:6a3c with SMTP id b11-20020adfee8b000000b0033d174b6a3cmr1734119wro.59.1708101039019; Fri, 16 Feb 2024 08:30:39 -0800 (PST) Received: from draig.lan ([85.9.250.243]) by smtp.gmail.com with ESMTPSA id n14-20020a5d420e000000b0033d282c7537sm18879wrq.23.2024.02.16.08.30.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Feb 2024 08:30:32 -0800 (PST) Received: from draig.lan (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 972985F9DF; Fri, 16 Feb 2024 16:30:27 +0000 (GMT) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Yoshinori Sato , David Hildenbrand , Weiwei Li , Richard Henderson , Michael Rolnik , Ilya Leoshkevich , Peter Maydell , qemu-ppc@nongnu.org, Paolo Bonzini , qemu-riscv@nongnu.org, Cleber Rosa , Thomas Huth , Song Gao , qemu-arm@nongnu.org, Pierrick Bouvier , John Snow , =?utf-8?q?Alex_Benn=C3=A9e?= , =?utf-8?q?C=C3=A9dri?= =?utf-8?q?c_Le_Goater?= , Nicholas Piggin , qemu-s390x@nongnu.org, Laurent Vivier , "Edgar E. Iglesias" , Daniel Henrique Barboza , Yanan Wang , Palmer Dabbelt , Marcel Apfelbaum , Brian Cain , Mahmoud Mandour , Alexandre Iooss , Bin Meng , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Daniel Henrique Barboza , Eduardo Habkost , Alistair Francis , Liu Zhiwei Subject: [PATCH 13/23] plugins: add qemu_plugin_num_vcpus function Date: Fri, 16 Feb 2024 16:30:15 +0000 Message-Id: <20240216163025.424857-14-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240216163025.424857-1-alex.bennee@linaro.org> References: <20240216163025.424857-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32b; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x32b.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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 Bennée --- 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 *userdata); +/* 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; }; @@ -97,4 +99,6 @@ void plugin_register_vcpu_mem_cb(GArray **arr, void exec_inline_op(struct qemu_plugin_dyn_cb *cb); +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 struct qemu_plugin_hwaddr *h) #endif } +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; qemu_rec_mutex_lock(&plugin.lock); + plugin.num_vcpus = MAX(plugin.num_vcpus, cpu->cpu_index + 1); plugin_cpu_update__locked(&cpu->cpu_index, NULL, NULL); success = g_hash_table_insert(plugin.cpu_ht, &cpu->cpu_index, &cpu->cpu_index); @@ -570,3 +571,8 @@ static void __attribute__((__constructor__)) plugin_init(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;