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ae7467b1ac
As HW virtualization requires specific support to handle breakpoints lets push out special casing out of the core gdbstub code and into AccelOpsClass. This will make it easier to add other accelerator support and reduces some of the stub shenanigans. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Mads Ynddal <mads@ynddal.dk> Message-Id: <20220929114231.583801-45-alex.bennee@linaro.org>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* QEMU KVM support
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*
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* Copyright IBM, Corp. 2008
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* Red Hat, Inc. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Glauber Costa <gcosta@redhat.com>
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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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*/
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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "sysemu/kvm.h"
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#include "sysemu/kvm_int.h"
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#include "sysemu/runstate.h"
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#include "sysemu/cpus.h"
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#include "qemu/guest-random.h"
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#include "qapi/error.h"
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#include <linux/kvm.h>
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#include "kvm-cpus.h"
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static void *kvm_vcpu_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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rcu_register_thread();
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qemu_mutex_lock_iothread();
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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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cpu->can_do_io = 1;
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current_cpu = cpu;
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r = kvm_init_vcpu(cpu, &error_fatal);
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kvm_init_cpu_signals(cpu);
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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 = kvm_cpu_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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qemu_wait_io_event(cpu);
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} while (!cpu->unplug || cpu_can_run(cpu));
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kvm_destroy_vcpu(cpu);
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cpu_thread_signal_destroyed(cpu);
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qemu_mutex_unlock_iothread();
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rcu_unregister_thread();
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return NULL;
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}
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static void kvm_start_vcpu_thread(CPUState *cpu)
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{
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char thread_name[VCPU_THREAD_NAME_SIZE];
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cpu->thread = g_malloc0(sizeof(QemuThread));
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cpu->halt_cond = g_malloc0(sizeof(QemuCond));
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qemu_cond_init(cpu->halt_cond);
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snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
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cpu->cpu_index);
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qemu_thread_create(cpu->thread, thread_name, kvm_vcpu_thread_fn,
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cpu, QEMU_THREAD_JOINABLE);
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}
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static bool kvm_vcpu_thread_is_idle(CPUState *cpu)
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{
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return !kvm_halt_in_kernel();
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}
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static bool kvm_cpus_are_resettable(void)
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{
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return !kvm_enabled() || kvm_cpu_check_are_resettable();
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}
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static void kvm_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 = kvm_start_vcpu_thread;
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ops->cpu_thread_is_idle = kvm_vcpu_thread_is_idle;
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ops->cpus_are_resettable = kvm_cpus_are_resettable;
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ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset;
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ops->synchronize_post_init = kvm_cpu_synchronize_post_init;
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ops->synchronize_state = kvm_cpu_synchronize_state;
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ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm;
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#ifdef KVM_CAP_SET_GUEST_DEBUG
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ops->insert_breakpoint = kvm_insert_breakpoint;
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ops->remove_breakpoint = kvm_remove_breakpoint;
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ops->remove_all_breakpoints = kvm_remove_all_breakpoints;
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#endif
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}
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static const TypeInfo kvm_accel_ops_type = {
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.name = ACCEL_OPS_NAME("kvm"),
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.parent = TYPE_ACCEL_OPS,
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.class_init = kvm_accel_ops_class_init,
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.abstract = true,
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};
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static void kvm_accel_ops_register_types(void)
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{
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type_register_static(&kvm_accel_ops_type);
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}
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type_init(kvm_accel_ops_register_types);
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