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Mon, 26 Feb 2024 08:57:02 -0800 (PST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Liu Zhiwei , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-riscv@nongnu.org, Michael Rolnik , Song Gao , Alexandre Iooss , Marcel Apfelbaum , David Hildenbrand , Pierrick Bouvier , John Snow , Eduardo Habkost , Mahmoud Mandour , qemu-arm@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Paolo Bonzini , Cleber Rosa , qemu-ppc@nongnu.org, Richard Henderson , qemu-s390x@nongnu.org, Daniel Henrique Barboza , Thomas Huth , Yoshinori Sato , Yanan Wang , Brian Cain , Ilya Leoshkevich , Weiwei Li , "Edgar E. Iglesias" , Bin Meng , Laurent Vivier , Palmer Dabbelt , Daniel Henrique Barboza , Alistair Francis Subject: [PATCH v3 15/27] plugins: fix order of init/idle/resume callback Date: Mon, 26 Feb 2024 16:56:34 +0000 Message-Id: <20240226165646.425600-16-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240226165646.425600-1-alex.bennee@linaro.org> References: <20240226165646.425600-1-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::434; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x434.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=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: 1708967380321100004 From: Pierrick Bouvier We found that vcpu_init_hook was called *after* idle callback. vcpu_init is called from cpu_realize_fn, while idle/resume cb are called from qemu_wait_io_event (in vcpu thread). This change ensures we only call idle and resume cb only once a plugin was init for a given vcpu. Next change in the series will run vcpu_init asynchronously, which will make it run *after* resume callback as well. So we fix this now. Reviewed-by: Richard Henderson Signed-off-by: Pierrick Bouvier Message-Id: <20240213094009.150349-4-pierrick.bouvier@linaro.org> Signed-off-by: Alex Benn=C3=A9e --- plugins/core.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/plugins/core.c b/plugins/core.c index caa66311351..2392bbb8889 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -391,12 +391,17 @@ void qemu_plugin_vcpu_syscall_ret(CPUState *cpu, int6= 4_t num, int64_t ret) =20 void qemu_plugin_vcpu_idle_cb(CPUState *cpu) { - plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_IDLE); + /* idle and resume cb may be called before init, ignore in this case */ + if (cpu->cpu_index < plugin.num_vcpus) { + plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_IDLE); + } } =20 void qemu_plugin_vcpu_resume_cb(CPUState *cpu) { - plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_RESUME); + if (cpu->cpu_index < plugin.num_vcpus) { + plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_RESUME); + } } =20 void qemu_plugin_register_vcpu_idle_cb(qemu_plugin_id_t id, --=20 2.39.2