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2024-03-11hw/core: Cleanup unused included headers in cpu-common.cZhao Liu
Remove unused headers in cpu-common.c: * qemu/notify.h * exec/cpu-common.h * qemu/error-report.h * qemu/qemu-print.h Tested by "./configure" and then "make". Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20240311075621.3224684-2-zhao1.liu@linux.intel.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-28plugins: create CPUPluginState and migrate plugin_maskAlex Bennée
As we expand the per-vCPU data for plugins we don't want to pollute CPUState. For now this just moves the plugin_mask (renamed to event_mask) as the memory callbacks are accessed directly by TCG generated code. Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-23-alex.bennee@linaro.org>
2024-02-28cpu: call plugin init hook asynchronouslyPierrick Bouvier
This ensures we run during a cpu_exec, which allows to call start/end exclusive from this init hook (needed for new scoreboard API introduced later). async work is run before any tb is translated/executed, so we can guarantee plugin init will be called before any other hook. The previous change made sure that any idle/resume cb call will not be done before initializing plugin for a given vcpu. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20240213094009.150349-5-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-20-alex.bennee@linaro.org>
2024-02-28gdbstub: Simplify XML lookupAkihiko Odaki
Now we know all instances of GDBFeature that is used in CPU so we can traverse them to find XML. This removes the need for a CPU-specific lookup function for dynamic XMLs. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231213-gdb-v17-7-777047380591@daynix.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-12-alex.bennee@linaro.org>
2024-01-19hw/core/cpu: Rename cpu_class_init() to include 'common'Philippe Mathieu-Daudé
cpu_class_init() is common, so rename it as cpu_common_class_init() to ease navigating the code. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Message-ID: <20240111120221.35072-3-philmd@linaro.org>
2024-01-08system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()Stefan Hajnoczi
The Big QEMU Lock (BQL) has many names and they are confusing. The actual QemuMutex variable is called qemu_global_mutex but it's commonly referred to as the BQL in discussions and some code comments. The locking APIs, however, are called qemu_mutex_lock_iothread() and qemu_mutex_unlock_iothread(). The "iothread" name is historic and comes from when the main thread was split into into KVM vcpu threads and the "iothread" (now called the main loop thread). I have contributed to the confusion myself by introducing a separate --object iothread, a separate concept unrelated to the BQL. The "iothread" name is no longer appropriate for the BQL. Rename the locking APIs to: - void bql_lock(void) - void bql_unlock(void) - bool bql_locked(void) There are more APIs with "iothread" in their names. Subsequent patches will rename them. There are also comments and documentation that will be updated in later patches. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org> Acked-by: Fabiano Rosas <farosas@suse.de> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Peter Xu <peterx@redhat.com> Acked-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Acked-by: Hyman Huang <yong.huang@smartx.com> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-id: 20240102153529.486531-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2024-01-05cpu: Call object_class_dynamic_cast() once in cpu_class_by_name()Philippe Mathieu-Daudé
For all targets, the CPU class returned from CPUClass::class_by_name() and object_class_dynamic_cast(oc, CPU_RESOLVING_TYPE) need to be compatible. Lets apply the check in cpu_class_by_name() for once, instead of having the check in CPUClass::class_by_name() for individual target. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Gavin Shan <gshan@redhat.com> Message-ID: <20231114235628.534334-4-gshan@redhat.com>
2023-11-08cpu: Call plugin hooks only when readyAkihiko Odaki
The initialization and exit hooks will not affect the state of vCPU outside TCG context, but they may depend on the state of vCPU. Therefore, it's better to call plugin hooks after the vCPU state is fully initialized and before it gets uninitialized. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231025093128.33116-16-akihiko.odaki@daynix.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231106185112.2755262-12-alex.bennee@linaro.org>
2023-11-07hw/cpu: Call object_class_is_abstract() once in cpu_class_by_name()Philippe Mathieu-Daudé
Let CPUClass::class_by_name() handlers to return abstract classes, and filter them once in the public cpu_class_by_name() method. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230908112235.75914-3-philmd@linaro.org>
2023-11-07accel/tcg: Factor tcg_cpu_reset_hold() outPhilippe Mathieu-Daudé
Factor the TCG specific code from cpu_common_reset_hold() to tcg_cpu_reset_hold() within tcg-accel-ops.c. Since this file is sysemu specific, we can inline tcg_flush_softmmu_tlb(), removing its declaration in "exec/cpu-common.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: <20230918104153.24433-4-philmd@linaro.org>
2023-11-07accel: Introduce cpu_exec_reset_hold()Philippe Mathieu-Daudé
Introduce cpu_exec_reset_hold() which call an accelerator specific AccelOpsClass::cpu_reset_hold() handler. Define a stub on TCG user emulation, because CPU reset is irrelevant there. 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: <20230918104153.24433-3-philmd@linaro.org>
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>
2023-10-07cpu: Correct invalid mentions of 'softmmu' by 'system-mode'Philippe Mathieu-Daudé
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20231004090629.37473-4-philmd@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-10-03accel/tcg: Move can_do_io to CPUNegativeOffsetStateRichard Henderson
Minimize the displacement to can_do_io, since it may be touched at the start of each TranslationBlock. It fits into other padding within the substructure. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-03accel/tcg: Remove CPUState.icount_decr_ptrRichard Henderson
We can now access icount_decr directly. Reviewed-by: Anton Johansson <anjo@rev.ng> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-06-09hw/core/cpu: Simplify realize() using MACHINE_GET_CLASS() macroPhilippe Mathieu-Daudé
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-06-01trace: remove code that depends on setting vcpuAlex Bennée
Now we no longer have any events that are for vcpus we can start excising the code from the trace control. As the vcpu parameter is encoded as part of QMP we just stub out the has_vcpu/vcpu parameters rather than alter the API. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20230526165401.574474-8-alex.bennee@linaro.org Message-Id: <20230524133952.3971948-7-alex.bennee@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-06-01trace-events: remove the remaining vcpu trace eventsAlex Bennée
While these are all in helper functions being designated vcpu events complicates the removal of the dynamic vcpu state code. TCG plugins allow you to instrument vcpu_[init|exit|idle]. We rename cpu_reset and make it a normal trace point. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20230526165401.574474-3-alex.bennee@linaro.org Message-Id: <20230524133952.3971948-3-alex.bennee@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-01-11accel: introduce accelerator blocker APIEmanuele Giuseppe Esposito
This API allows the accelerators to prevent vcpus from issuing new ioctls while execting a critical section marked with the accel_ioctl_inhibit_begin/end functions. Note that all functions submitting ioctls must mark where the ioctl is being called with accel_{cpu_}ioctl_begin/end(). This API requires the caller to always hold the BQL. API documentation is in sysemu/accel-blocker.h Internally, it uses a QemuLockCnt together with a per-CPU QemuLockCnt (to minimize cache line bouncing) to keep avoid that new ioctls run when the critical section starts, and a QemuEvent to wait that all running ioctls finish. Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20221111154758.1372674-2-eesposit@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-01-05accel/tcg: Set cflags_next_tb in cpu_common_initfnRichard Henderson
While we initialize this value in cpu_common_reset, that isn't called during startup, so set it as well in init. This fixes -singlestep versus the very first TB. Fixes: 04f5b647ed07 ("accel/tcg: Handle -singlestep in curr_cflags") Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-12-16hw/core/cpu-common: Convert TYPE_CPU class to 3-phase resetPeter Maydell
Convert the parent class TYPE_CPU to 3-phase reset. This is a necessary prerequisite to converting the subclasses. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20221124115023.2437291-2-peter.maydell@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>
2021-10-15Revert "cpu: Move cpu_common_props to hw/core/cpu.c"Richard Henderson
This reverts commit 1b36e4f5a5de585210ea95f2257839c2312be28f. Despite a comment saying why cpu_common_props cannot be placed in a file that is compiled once, it was moved anyway. Revert that. Since then, Property is not defined in hw/core/cpu.h, so it is now easier to declare a function to install the properties rather than the Property array itself. Cc: Eduardo Habkost <ehabkost@redhat.com> Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-03hw/core/cpu: removed cpu_dump_statistics functionBruno Larsen (billionai)
No more architectures set the pointer to dump_statistics, so there's no point in keeping it, or the related cpu_dump_statistics function. Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Bruno Larsen (billionai) <bruno.larsen@eldorado.org.br> Message-Id: <20210526202104.127910-6-bruno.larsen@eldorado.org.br> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Luis Pires <luis.pires@eldorado.org.br> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20210531145629.21300-2-bruno.larsen@eldorado.org.br> Acked-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2021-05-26cpu: Directly use get_memory_mapping() fallback handlers in placePhilippe Mathieu-Daudé
No code uses CPUClass::get_memory_mapping() outside of hw/core/cpu.c: $ git grep -F -- '->get_memory_mapping' hw/core/cpu.c:87: cc->get_memory_mapping(cpu, list, errp); hw/core/cpu.c:439: k->get_memory_mapping = cpu_common_get_memory_mapping; target/i386/cpu.c:7422: cc->get_memory_mapping = x86_cpu_get_memory_mapping; Check the handler presence in place and remove the common fallback code. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210517105140.1062037-11-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26cpu: Directly use get_paging_enabled() fallback handlers in placePhilippe Mathieu-Daudé
No code uses CPUClass::get_paging_enabled() outside of hw/core/cpu.c: $ git grep -F -- '->get_paging_enabled' hw/core/cpu.c:74: return cc->get_paging_enabled(cpu); hw/core/cpu.c:438: k->get_paging_enabled = cpu_common_get_paging_enabled; target/i386/cpu.c:7418: cc->get_paging_enabled = x86_cpu_get_paging_enabled; Check the handler presence in place and remove the common fallback code. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210517105140.1062037-10-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26cpu: Directly use cpu_write_elf*() fallback handlers in placePhilippe Mathieu-Daudé
No code directly accesses CPUClass::write_elf*() handlers out of hw/core/cpu.c (the rest are assignation in target/ code): $ git grep -F -- '->write_elf' hw/core/cpu.c:157: return (*cc->write_elf32_qemunote)(f, cpu, opaque); hw/core/cpu.c:171: return (*cc->write_elf32_note)(f, cpu, cpuid, opaque); hw/core/cpu.c:186: return (*cc->write_elf64_qemunote)(f, cpu, opaque); hw/core/cpu.c:200: return (*cc->write_elf64_note)(f, cpu, cpuid, opaque); hw/core/cpu.c:440: k->write_elf32_qemunote = cpu_common_write_elf32_qemunote; hw/core/cpu.c:441: k->write_elf32_note = cpu_common_write_elf32_note; hw/core/cpu.c:442: k->write_elf64_qemunote = cpu_common_write_elf64_qemunote; hw/core/cpu.c:443: k->write_elf64_note = cpu_common_write_elf64_note; target/arm/cpu.c:2304: cc->write_elf64_note = arm_cpu_write_elf64_note; target/arm/cpu.c:2305: cc->write_elf32_note = arm_cpu_write_elf32_note; target/i386/cpu.c:7425: cc->write_elf64_note = x86_cpu_write_elf64_note; target/i386/cpu.c:7426: cc->write_elf64_qemunote = x86_cpu_write_elf64_qemunote; target/i386/cpu.c:7427: cc->write_elf32_note = x86_cpu_write_elf32_note; target/i386/cpu.c:7428: cc->write_elf32_qemunote = x86_cpu_write_elf32_qemunote; target/ppc/translate_init.c.inc:10891: cc->write_elf64_note = ppc64_cpu_write_elf64_note; target/ppc/translate_init.c.inc:10892: cc->write_elf32_note = ppc32_cpu_write_elf32_note; target/s390x/cpu.c:522: cc->write_elf64_note = s390_cpu_write_elf64_note; Check the handler presence in place and remove the common fallback code. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210517105140.1062037-9-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26cpu: Introduce cpu_virtio_is_big_endian()Philippe Mathieu-Daudé
Introduce the cpu_virtio_is_big_endian() generic helper to avoid calling CPUClass internal virtio_is_big_endian() one. Similarly to commit bf7663c4bd8 ("cpu: introduce CPUClass::virtio_is_big_endian()"), we keep 'virtio' in the method name to hint this handler shouldn't be called anywhere but from the virtio code. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210517105140.1062037-8-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26cpu: Split as cpu-common / cpu-sysemuPhilippe Mathieu-Daudé
The current cpu.c contains sysemu-specific methods. To avoid building them in user-mode builds, split the current cpu.c as cpu-common.c / cpu-sysemu.c. Start by moving cpu_get_crash_info(). Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210517105140.1062037-6-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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