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whpx-accel-ops.c (3150B)

      1 /*
      2  * QEMU Windows Hypervisor Platform accelerator (WHPX)
      3  *
      4  * Copyright Microsoft Corp. 2017
      5  *
      6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
      7  * See the COPYING file in the top-level directory.
      8  *
      9  */
     10 
     11 #include "qemu/osdep.h"
     12 #include "sysemu/kvm_int.h"
     13 #include "qemu/main-loop.h"
     14 #include "sysemu/cpus.h"
     15 #include "qemu/guest-random.h"
     16 
     17 #include "sysemu/whpx.h"
     18 #include "whpx-internal.h"
     19 #include "whpx-accel-ops.h"
     20 
     21 static void *whpx_cpu_thread_fn(void *arg)
     22 {
     23     CPUState *cpu = arg;
     24     int r;
     25 
     26     rcu_register_thread();
     27 
     28     qemu_mutex_lock_iothread();
     29     qemu_thread_get_self(cpu->thread);
     30     cpu->thread_id = qemu_get_thread_id();
     31     current_cpu = cpu;
     32 
     33     r = whpx_init_vcpu(cpu);
     34     if (r < 0) {
     35         fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r));
     36         exit(1);
     37     }
     38 
     39     /* signal CPU creation */
     40     cpu_thread_signal_created(cpu);
     41     qemu_guest_random_seed_thread_part2(cpu->random_seed);
     42 
     43     do {
     44         if (cpu_can_run(cpu)) {
     45             r = whpx_vcpu_exec(cpu);
     46             if (r == EXCP_DEBUG) {
     47                 cpu_handle_guest_debug(cpu);
     48             }
     49         }
     50         while (cpu_thread_is_idle(cpu)) {
     51             qemu_cond_wait_iothread(cpu->halt_cond);
     52         }
     53         qemu_wait_io_event_common(cpu);
     54     } while (!cpu->unplug || cpu_can_run(cpu));
     55 
     56     whpx_destroy_vcpu(cpu);
     57     cpu_thread_signal_destroyed(cpu);
     58     qemu_mutex_unlock_iothread();
     59     rcu_unregister_thread();
     60     return NULL;
     61 }
     62 
     63 static void whpx_start_vcpu_thread(CPUState *cpu)
     64 {
     65     char thread_name[VCPU_THREAD_NAME_SIZE];
     66 
     67     cpu->thread = g_new0(QemuThread, 1);
     68     cpu->halt_cond = g_new0(QemuCond, 1);
     69     qemu_cond_init(cpu->halt_cond);
     70     snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
     71              cpu->cpu_index);
     72     qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn,
     73                        cpu, QEMU_THREAD_JOINABLE);
     74 #ifdef _WIN32
     75     cpu->hThread = qemu_thread_get_handle(cpu->thread);
     76 #endif
     77 }
     78 
     79 static void whpx_kick_vcpu_thread(CPUState *cpu)
     80 {
     81     if (!qemu_cpu_is_self(cpu)) {
     82         whpx_vcpu_kick(cpu);
     83     }
     84 }
     85 
     86 static bool whpx_vcpu_thread_is_idle(CPUState *cpu)
     87 {
     88     return !whpx_apic_in_platform();
     89 }
     90 
     91 static void whpx_accel_ops_class_init(ObjectClass *oc, void *data)
     92 {
     93     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
     94 
     95     ops->create_vcpu_thread = whpx_start_vcpu_thread;
     96     ops->kick_vcpu_thread = whpx_kick_vcpu_thread;
     97     ops->cpu_thread_is_idle = whpx_vcpu_thread_is_idle;
     98 
     99     ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset;
    100     ops->synchronize_post_init = whpx_cpu_synchronize_post_init;
    101     ops->synchronize_state = whpx_cpu_synchronize_state;
    102     ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm;
    103     ops->synchronize_pre_resume = whpx_cpu_synchronize_pre_resume;
    104 }
    105 
    106 static const TypeInfo whpx_accel_ops_type = {
    107     .name = ACCEL_OPS_NAME("whpx"),
    108 
    109     .parent = TYPE_ACCEL_OPS,
    110     .class_init = whpx_accel_ops_class_init,
    111     .abstract = true,
    112 };
    113 
    114 static void whpx_accel_ops_register_types(void)
    115 {
    116     type_register_static(&whpx_accel_ops_type);
    117 }
    118 type_init(whpx_accel_ops_register_types);