target/i386/whpx-cpus.c

   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-cpus.h"
  19
  20 #include <WinHvPlatform.h>
  21 #include <WinHvEmulation.h>
  22
  23 static void *whpx_cpu_thread_fn(void *arg)
  24 {
  25     CPUState *cpu = arg;
  26     int r;
  27
  28     rcu_register_thread();
  29
  30     qemu_mutex_lock_iothread();
  31     qemu_thread_get_self(cpu->thread);
  32     cpu->thread_id = qemu_get_thread_id();
  33     current_cpu = cpu;
  34
  35     r = whpx_init_vcpu(cpu);
  36     if (r < 0) {
  37         fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r));
  38         exit(1);
  39     }
  40
  41     /* signal CPU creation */
  42     cpu_thread_signal_created(cpu);
  43     qemu_guest_random_seed_thread_part2(cpu->random_seed);
  44
  45     do {
  46         if (cpu_can_run(cpu)) {
  47             r = whpx_vcpu_exec(cpu);
  48             if (r == EXCP_DEBUG) {
  49                 cpu_handle_guest_debug(cpu);
  50             }
  51         }
  52         while (cpu_thread_is_idle(cpu)) {
  53             qemu_cond_wait_iothread(cpu->halt_cond);
  54         }
  55         qemu_wait_io_event_common(cpu);
  56     } while (!cpu->unplug || cpu_can_run(cpu));
  57
  58     whpx_destroy_vcpu(cpu);
  59     cpu_thread_signal_destroyed(cpu);
  60     qemu_mutex_unlock_iothread();
  61     rcu_unregister_thread();
  62     return NULL;
  63 }
  64
  65 static void whpx_start_vcpu_thread(CPUState *cpu)
  66 {
  67     char thread_name[VCPU_THREAD_NAME_SIZE];
  68
  69     cpu->thread = g_malloc0(sizeof(QemuThread));
  70     cpu->halt_cond = g_malloc0(sizeof(QemuCond));
  71     qemu_cond_init(cpu->halt_cond);
  72     snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
  73              cpu->cpu_index);
  74     qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn,
  75                        cpu, QEMU_THREAD_JOINABLE);
  76 #ifdef _WIN32
  77     cpu->hThread = qemu_thread_get_handle(cpu->thread);
  78 #endif
  79 }
  80
  81 static void whpx_kick_vcpu_thread(CPUState *cpu)
  82 {
  83     if (!qemu_cpu_is_self(cpu)) {
  84         whpx_vcpu_kick(cpu);
  85     }
  86 }
  87
  88 const CpusAccel whpx_cpus = {
  89     .create_vcpu_thread = whpx_start_vcpu_thread,
  90     .kick_vcpu_thread = whpx_kick_vcpu_thread,
  91
  92     .synchronize_post_reset = whpx_cpu_synchronize_post_reset,
  93     .synchronize_post_init = whpx_cpu_synchronize_post_init,
  94     .synchronize_state = whpx_cpu_synchronize_state,
  95     .synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm,
  96 };