/* * QEMU TCG vCPU common functionality * * Functionality common to all TCG vCPU variants: mttcg, rr and icount. * * Copyright (c) 2003-2008 Fabrice Bellard * Copyright (c) 2014 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "qemu-common.h" #include "sysemu/tcg.h" #include "sysemu/replay.h" #include "qemu/main-loop.h" #include "qemu/guest-random.h" #include "exec/exec-all.h" #include "hw/boards.h" #include "tcg-accel-ops.h" #include "tcg-accel-ops-mttcg.h" #include "tcg-accel-ops-rr.h" #include "tcg-accel-ops-icount.h" /* common functionality among all TCG variants */ void tcg_cpus_destroy(CPUState *cpu) { cpu_thread_signal_destroyed(cpu); } int tcg_cpus_exec(CPUState *cpu) { int ret; #ifdef CONFIG_PROFILER int64_t ti; #endif assert(tcg_enabled()); #ifdef CONFIG_PROFILER ti = profile_getclock(); #endif cpu_exec_start(cpu); ret = cpu_exec(cpu); cpu_exec_end(cpu); #ifdef CONFIG_PROFILER qatomic_set(&tcg_ctx->prof.cpu_exec_time, tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti); #endif return ret; } /* mask must never be zero, except for A20 change call */ void tcg_handle_interrupt(CPUState *cpu, int mask) { g_assert(qemu_mutex_iothread_locked()); cpu->interrupt_request |= mask; /* * If called from iothread context, wake the target cpu in * case its halted. */ if (!qemu_cpu_is_self(cpu)) { qemu_cpu_kick(cpu); } else { qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1); } } static void tcg_accel_ops_init(AccelOpsClass *ops) { if (qemu_tcg_mttcg_enabled()) { ops->create_vcpu_thread = mttcg_start_vcpu_thread; ops->kick_vcpu_thread = mttcg_kick_vcpu_thread; ops->handle_interrupt = tcg_handle_interrupt; } else if (icount_enabled()) { ops->create_vcpu_thread = rr_start_vcpu_thread; ops->kick_vcpu_thread = rr_kick_vcpu_thread; ops->handle_interrupt = icount_handle_interrupt; ops->get_virtual_clock = icount_get; ops->get_elapsed_ticks = icount_get; } else { ops->create_vcpu_thread = rr_start_vcpu_thread; ops->kick_vcpu_thread = rr_kick_vcpu_thread; ops->handle_interrupt = tcg_handle_interrupt; } } static void tcg_accel_ops_class_init(ObjectClass *oc, void *data) { AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); ops->ops_init = tcg_accel_ops_init; } static const TypeInfo tcg_accel_ops_type = { .name = ACCEL_OPS_NAME("tcg"), .parent = TYPE_ACCEL_OPS, .class_init = tcg_accel_ops_class_init, .abstract = true, }; static void tcg_accel_ops_register_types(void) { type_register_static(&tcg_accel_ops_type); } type_init(tcg_accel_ops_register_types);