cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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kvm-accel-ops.c (2645B)

      1/*
      2 * QEMU KVM support
      3 *
      4 * Copyright IBM, Corp. 2008
      5 *           Red Hat, Inc. 2008
      6 *
      7 * Authors:
      8 *  Anthony Liguori   <aliguori@us.ibm.com>
      9 *  Glauber Costa     <gcosta@redhat.com>
     10 *
     11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
     12 * See the COPYING file in the top-level directory.
     13 *
     14 */
     15
     16#include "qemu/osdep.h"
     17#include "qemu/error-report.h"
     18#include "qemu/main-loop.h"
     19#include "sysemu/kvm_int.h"
     20#include "sysemu/runstate.h"
     21#include "sysemu/cpus.h"
     22#include "qemu/guest-random.h"
     23#include "qapi/error.h"
     24
     25#include "kvm-cpus.h"
     26
     27static void *kvm_vcpu_thread_fn(void *arg)
     28{
     29    CPUState *cpu = arg;
     30    int r;
     31
     32    rcu_register_thread();
     33
     34    qemu_mutex_lock_iothread();
     35    qemu_thread_get_self(cpu->thread);
     36    cpu->thread_id = qemu_get_thread_id();
     37    cpu->can_do_io = 1;
     38    current_cpu = cpu;
     39
     40    r = kvm_init_vcpu(cpu, &error_fatal);
     41    kvm_init_cpu_signals(cpu);
     42
     43    /* signal CPU creation */
     44    cpu_thread_signal_created(cpu);
     45    qemu_guest_random_seed_thread_part2(cpu->random_seed);
     46
     47    do {
     48        if (cpu_can_run(cpu)) {
     49            r = kvm_cpu_exec(cpu);
     50            if (r == EXCP_DEBUG) {
     51                cpu_handle_guest_debug(cpu);
     52            }
     53        }
     54        qemu_wait_io_event(cpu);
     55    } while (!cpu->unplug || cpu_can_run(cpu));
     56
     57    kvm_destroy_vcpu(cpu);
     58    cpu_thread_signal_destroyed(cpu);
     59    qemu_mutex_unlock_iothread();
     60    rcu_unregister_thread();
     61    return NULL;
     62}
     63
     64static void kvm_start_vcpu_thread(CPUState *cpu)
     65{
     66    char thread_name[VCPU_THREAD_NAME_SIZE];
     67
     68    cpu->thread = g_malloc0(sizeof(QemuThread));
     69    cpu->halt_cond = g_malloc0(sizeof(QemuCond));
     70    qemu_cond_init(cpu->halt_cond);
     71    snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
     72             cpu->cpu_index);
     73    qemu_thread_create(cpu->thread, thread_name, kvm_vcpu_thread_fn,
     74                       cpu, QEMU_THREAD_JOINABLE);
     75}
     76
     77static void kvm_accel_ops_class_init(ObjectClass *oc, void *data)
     78{
     79    AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
     80
     81    ops->create_vcpu_thread = kvm_start_vcpu_thread;
     82    ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset;
     83    ops->synchronize_post_init = kvm_cpu_synchronize_post_init;
     84    ops->synchronize_state = kvm_cpu_synchronize_state;
     85    ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm;
     86}
     87
     88static const TypeInfo kvm_accel_ops_type = {
     89    .name = ACCEL_OPS_NAME("kvm"),
     90
     91    .parent = TYPE_ACCEL_OPS,
     92    .class_init = kvm_accel_ops_class_init,
     93    .abstract = true,
     94};
     95
     96static void kvm_accel_ops_register_types(void)
     97{
     98    type_register_static(&kvm_accel_ops_type);
     99}
    100type_init(kvm_accel_ops_register_types);