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2024-06-24plugins: add time control APIAlex Bennée
Expose the ability to control time through the plugin API. Only one plugin can control time so it has to request control when loaded. There are probably more corner cases to catch here. Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> [AJB: tweaked user-mode handling, merged QEMU_PLUGIN_API fix] Message-Id: <20240530220610.1245424-6-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240620152220.2192768-9-alex.bennee@linaro.org>
2024-05-16plugins: conditional callbacksPierrick Bouvier
Extend plugins API to support callback called with a given criteria (evaluated inline). Added functions: - qemu_plugin_register_vcpu_tb_exec_cond_cb - qemu_plugin_register_vcpu_insn_exec_cond_cb They expect as parameter a condition, a qemu_plugin_u64_t (op1) and an immediate (op2). Callback is called if op1 |cond| op2 is true. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240502211522.346467-6-pierrick.bouvier@linaro.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> [AJB: fix re-base conflict with tb_is_mem_only()] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240514174253.694591-8-alex.bennee@linaro.org>
2024-03-06plugins: remove non per_vcpu inline operation from APIPierrick Bouvier
Now we have a thread-safe equivalent of inline operation, and that all plugins were changed to use it, there is no point to keep the old API. In more, it will help when we implement more functionality (conditional callbacks), as we can assume that we operate on a scoreboard. API version bump was already done as part of this series. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240304130036.124418-12-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-25-alex.bennee@linaro.org>
2024-03-06plugins: add inline operation per vcpuPierrick Bouvier
Extends API with three new functions: qemu_plugin_register_vcpu_{tb, insn, mem}_exec_inline_per_vcpu(). Those functions takes a qemu_plugin_u64 as input. This allows to have a thread-safe and type-safe version of inline operations. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240304130036.124418-5-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-18-alex.bennee@linaro.org>
2024-03-06plugins: define qemu_plugin_u64Pierrick Bouvier
Additionally to the scoreboard, we define a qemu_plugin_u64, which is a simple struct holding a pointer to a scoreboard, and a given offset. This allows to have a scoreboard containing structs, without having to bring offset to operate on a specific field. Since most of the plugins are simply collecting a sum of per-cpu values, qemu_plugin_u64 directly support this operation as well. All inline operations defined later will use a qemu_plugin_u64 as input. New functions: - qemu_plugin_u64_add - qemu_plugin_u64_get - qemu_plugin_u64_set - qemu_plugin_u64_sum New macros: - qemu_plugin_scoreboard_u64 - qemu_plugin_scoreboard_u64_in_struct Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240304130036.124418-3-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-16-alex.bennee@linaro.org>
2024-03-06plugins: scoreboard APIPierrick Bouvier
We introduce a cpu local storage, automatically managed (and extended) by QEMU itself. Plugin allocate a scoreboard, and don't have to deal with how many cpus are launched. This API will be used by new inline functions but callbacks can benefit from this as well. This way, they can operate without a global lock for simple operations. At any point during execution, any scoreboard will be dimensioned with at least qemu_plugin_num_vcpus entries. New functions: - qemu_plugin_scoreboard_find - qemu_plugin_scoreboard_free - qemu_plugin_scoreboard_new Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240304130036.124418-2-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-15-alex.bennee@linaro.org>
2024-02-28plugins: add an API to read registersAlex Bennée
We can only request a list of registers once the vCPU has been initialised so the user needs to use either call the get function on vCPU initialisation or during the translation phase. We don't expose the reg number to the plugin instead hiding it behind an opaque handle. For now this is just the gdb_regnum encapsulated in an anonymous GPOINTER but in future as we add more state for plugins to track we can expand it. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1706 Based-on: <20231025093128.33116-18-akihiko.odaki@daynix.com> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-24-alex.bennee@linaro.org>
2024-02-28plugins: add qemu_plugin_num_vcpus functionPierrick 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 <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240213094009.150349-3-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-17-alex.bennee@linaro.org>
2024-02-28plugins: remove previous n_vcpus functions from APIPierrick Bouvier
This information is already accessible using qemu_info_t during plugin install. We will introduce another function (qemu_plugin_num_vcpus) which represent how many cpus were enabled, by tracking new cpu indexes. It's a breaking change, so we bump API version. Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240213094009.150349-2-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-16-alex.bennee@linaro.org>
2022-02-09plugins: add helper functions for coverage pluginsIvanov Arkady
Which provide information about: - start_code. - end_code. - entry. - path to the executable binary. Signed-off-by: Ivanov Arkady <arkadiy.ivanov@ispras.ru> Message-Id: <163491883461.304355.8210754161847179432.stgit@pc-System-Product-Name> [AJB: reword title, better descriptions, defaults, rm export, fix include] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20220204204335.1689602-22-alex.bennee@linaro.org>
2021-10-12plugins/: Add missing functions to symbol listLukas Jünger
Some functions of the plugin API were missing in the symbol list. However, they are all used by the contributed example plugins. QEMU fails to load the plugin if the function symbol is not exported. Signed-off-by: Lukas Jünger <lukas.junger@greensocs.com> Message-Id: <20210905140939.638928-2-lukas.junger@greensocs.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210917162332.3511179-11-alex.bennee@linaro.org>
2021-09-02plugins/api: added a boolean parsing plugin apiMahmoud Mandour
This call will help boolean argument parsing since arguments are now passed to plugins as a name and value. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210730135817.17816-3-ma.mandourr@gmail.com> [AJB: add to symbols] Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2021-09-02plugins: sort exported symbol listAlex Bennée
This will make it easier to add new exported functions. Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2021-07-14tcg/plugins: remove some stale entries from the symbol listAlex Bennée
The OSX linker is a lot fussier about these missing symbols. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210714101623.17046-1-alex.bennee@linaro.org>
2019-10-28plugin: add qemu_plugin_outs helperAlex Bennée
Having the plugins grab stdout and spew stuff there is a bit ugly and certainly makes the tests look ugly. Provide a hook back into QEMU which can be redirected as needed. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Aaron Lindsay <aaron@os.amperecomputing.com>
2019-10-28plugin: add qemu_plugin_insn_disas helperAlex Bennée
Give the plugins access to the QEMU dissasembler so they don't have to re-invent the wheel. We generate a warning when there are spare bytes in the decode buffer. This is usually due to the front end loading in more bytes than decoded. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-10-28plugin: add API symbols to qemu-plugins.symbolsEmilio G. Cota
Signed-off-by: Emilio G. Cota <cota@braap.org> [AJB: moved into plugins] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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