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2023-11-07accel/tcg: Declare tcg_flush_jmp_cache() in 'exec/tb-flush.h'Philippe Mathieu-Daudé
"exec/cpu-common.h" is meant to contain the declarations related to CPU usable with any accelerator / target combination. tcg_flush_jmp_cache() is specific to TCG, so restrict its declaration by moving it to "exec/tb-flush.h". Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Anton Johansson <anjo@rev.ng> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230918104153.24433-2-philmd@linaro.org>
2023-10-11plugins: Check if vCPU is realizedAkihiko Odaki
The created member of CPUState tells if the vCPU thread is started, and will be always false for the user space emulation that manages threads independently. Use the realized member of DeviceState, which is valid for both of the system and user space emulation. Fixes: 54cb65d858 ("plugin: add core code") Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-Id: <20230912224107.29669-4-akihiko.odaki@daynix.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231009164104.369749-11-alex.bennee@linaro.org>
2023-06-20plugins: Remove unused 'exec/helper-proto.h' headerPhilippe Mathieu-Daudé
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230611085846.21415-2-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-22include/qemu/plugin: Inline qemu_plugin_disable_mem_helpersRichard Henderson
Now that we've broken the include loop with cpu.h, we can bring this inline. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230310195252.210956-8-richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230315174331.2959-18-alex.bennee@linaro.org> Reviewed-by: Emilio Cota <cota@braap.org>
2023-03-07includes: move tb_flush into its own headerAlex Bennée
This aids subsystems (like gdbstub) that want to trigger a flush without pulling target specific headers. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230302190846.2593720-8-alex.bennee@linaro.org> Message-Id: <20230303025805.625589-8-richard.henderson@linaro.org>
2023-02-02plugins: Iterate on cb_lists in qemu_plugin_user_exitRichard Henderson
Rather than iterate over all plugins for all events, iterate over plugins that have registered a given event. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230117035701.168514-4-richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230124180127.1881110-36-alex.bennee@linaro.org>
2023-02-02plugins: make qemu_plugin_user_exit's locking order consistent with fork_start'sEmilio Cota
To fix potential deadlocks as reported by tsan. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Emilio Cota <cota@braap.org> Message-Id: <20230111151628.320011-6-cota@braap.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230124180127.1881110-31-alex.bennee@linaro.org>
2022-10-06plugins: add [pre|post]fork helpers to linux-userAlex Bennée
Special care needs to be taken in ensuring locks are in a consistent state across fork events. Add helpers so the plugin system can ensure that. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Fixes: https://gitlab.com/qemu-project/qemu/-/issues/358 Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Tested-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221004115221.2174499-1-alex.bennee@linaro.org>
2022-10-04include/hw/core: Create struct CPUJumpCacheRichard Henderson
Wrap the bare TranslationBlock pointer into a structure. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-10-05plugins: Reorg arguments to qemu_plugin_vcpu_mem_cbRichard Henderson
Use the MemOpIdx directly, rather than the rearrangement of the same bits currently done by the trace infrastructure. Pass in enum qemu_plugin_mem_rw so that we are able to treat read-modify-write operations as a single operation. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-07-23tcg/plugins: implement a qemu_plugin_user_exit helperAlex Bennée
In user-mode emulation there is a small race between preexit_cleanup and exit_group() which means we may end up calling instrumented instructions before the kernel reaps child threads. To solve this we implement a new helper which ensures the callbacks are flushed along with any translations before we let the host do it's a thing. While we are at it make the documentation of qemu_plugin_register_atexit_cb clearer as to what the user can expect. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Mahmoud Mandour <ma.mandourr@gmail.com> Acked-by: Warner Losh <imp@bsdimp.com> Message-Id: <20210720232703.10650-21-alex.bennee@linaro.org>
2021-07-21trace: Fold mem-internal.h into mem.hRichard Henderson
Since the last thing that mem.h does is include mem-internal.h, the symbols are not actually private. Tested-by: Cole Robinson <crobinso@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-19plugins: Drop tcg_flags from struct qemu_plugin_dyn_cbRichard Henderson
As noted by qemu-plugins.h, enum qemu_plugin_cb_flags is currently unused -- plugins can neither read nor write guest registers. Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-02Do not include cpu.h if it's not really necessaryThomas Huth
Stop including cpu.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-4-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-02Do not include sysemu/sysemu.h if it's not really necessaryThomas Huth
Stop including sysemu/sysemu.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-2-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-01-02cfi: Initial support for cfi-icall in QEMUDaniele Buono
LLVM/Clang, supports runtime checks for forward-edge Control-Flow Integrity (CFI). CFI on indirect function calls (cfi-icall) ensures that, in indirect function calls, the function called is of the right signature for the pointer type defined at compile time. For this check to work, the code must always respect the function signature when using function pointer, the function must be defined at compile time, and be compiled with link-time optimization. This rules out, for example, shared libraries that are dynamically loaded (given that functions are not known at compile time), and code that is dynamically generated at run-time. This patch: 1) Introduces the CONFIG_CFI flag to support cfi in QEMU 2) Introduces a decorator to allow the definition of "sensitive" functions, where a non-instrumented function may be called at runtime through a pointer. The decorator will take care of disabling cfi-icall checks on such functions, when cfi is enabled. 3) Marks functions currently in QEMU that exhibit such behavior, in particular: - The function in TCG that calls pre-compiled TBs - The function in TCI that interprets instructions - Functions in the plugin infrastructures that jump to callbacks - Functions in util that directly call a signal handler Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com> Acked-by: Alex Bennée <alex.bennee@linaro.org Message-Id: <20201204230615.2392-3-dbuono@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-17lockable: add QemuRecMutex supportStefan Hajnoczi
The polymorphic locking macros don't support QemuRecMutex yet. Add it so that lock guards can be used with QemuRecMutex. Convert TCG plugins functions that benefit from these macros. Manual qemu_rec_mutex_lock/unlock() callers are left unmodified in cases where clarity would not improve by switching to the macros. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-25plugins/core: add missing break in cb_to_tcg_flagsEmilio G. Cota
Fixes: 54cb65d8588 Reported-by: Robert Henry <robhenry@microsoft.com> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20200105072940.32204-1-cota@braap.org> Cc: qemu-stable@nongnu.org Message-Id: <20200225124710.14152-12-alex.bennee@linaro.org>
2019-10-28plugin: add core codeEmilio G. Cota
Signed-off-by: Emilio G. Cota <cota@braap.org> [AJB: moved directory and merged various fixes] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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