a4c2735f35
Aside from the round robin threads this is all common code. By moving the halt_cond setup we also no longer need hacks to work around the race between QOM object creation and thread creation. It is a little ugly to free stuff up for the round robin thread but better it deal with its own specialises than making the other accelerators jump through hoops. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-ID: <20240530194250.1801701-3-alex.bennee@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/*
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* Copyright (c) 2018-2019 Maxime Villard, All rights reserved.
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*
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* NetBSD Virtual Machine Monitor (NVMM) accelerator for QEMU.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "sysemu/kvm_int.h"
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#include "qemu/main-loop.h"
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#include "sysemu/cpus.h"
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#include "qemu/guest-random.h"
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#include "sysemu/nvmm.h"
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#include "nvmm-accel-ops.h"
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static void *qemu_nvmm_cpu_thread_fn(void *arg)
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{
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CPUState *cpu = arg;
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int r;
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assert(nvmm_enabled());
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rcu_register_thread();
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bql_lock();
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qemu_thread_get_self(cpu->thread);
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cpu->thread_id = qemu_get_thread_id();
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current_cpu = cpu;
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r = nvmm_init_vcpu(cpu);
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if (r < 0) {
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fprintf(stderr, "nvmm_init_vcpu failed: %s\n", strerror(-r));
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exit(1);
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}
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/* signal CPU creation */
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cpu_thread_signal_created(cpu);
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qemu_guest_random_seed_thread_part2(cpu->random_seed);
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do {
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if (cpu_can_run(cpu)) {
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r = nvmm_vcpu_exec(cpu);
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if (r == EXCP_DEBUG) {
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cpu_handle_guest_debug(cpu);
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}
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}
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while (cpu_thread_is_idle(cpu)) {
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qemu_cond_wait_bql(cpu->halt_cond);
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}
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qemu_wait_io_event_common(cpu);
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} while (!cpu->unplug || cpu_can_run(cpu));
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nvmm_destroy_vcpu(cpu);
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cpu_thread_signal_destroyed(cpu);
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bql_unlock();
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rcu_unregister_thread();
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return NULL;
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}
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static void nvmm_start_vcpu_thread(CPUState *cpu)
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{
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char thread_name[VCPU_THREAD_NAME_SIZE];
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snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/NVMM",
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cpu->cpu_index);
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qemu_thread_create(cpu->thread, thread_name, qemu_nvmm_cpu_thread_fn,
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cpu, QEMU_THREAD_JOINABLE);
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}
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/*
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* Abort the call to run the virtual processor by another thread, and to
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* return the control to that thread.
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*/
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static void nvmm_kick_vcpu_thread(CPUState *cpu)
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{
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cpu->exit_request = 1;
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cpus_kick_thread(cpu);
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}
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static void nvmm_accel_ops_class_init(ObjectClass *oc, void *data)
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{
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AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
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ops->create_vcpu_thread = nvmm_start_vcpu_thread;
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ops->kick_vcpu_thread = nvmm_kick_vcpu_thread;
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ops->synchronize_post_reset = nvmm_cpu_synchronize_post_reset;
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ops->synchronize_post_init = nvmm_cpu_synchronize_post_init;
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ops->synchronize_state = nvmm_cpu_synchronize_state;
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ops->synchronize_pre_loadvm = nvmm_cpu_synchronize_pre_loadvm;
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}
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static const TypeInfo nvmm_accel_ops_type = {
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.name = ACCEL_OPS_NAME("nvmm"),
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.parent = TYPE_ACCEL_OPS,
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.class_init = nvmm_accel_ops_class_init,
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.abstract = true,
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};
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static void nvmm_accel_ops_register_types(void)
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{
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type_register_static(&nvmm_accel_ops_type);
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}
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type_init(nvmm_accel_ops_register_types);
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