acrn-hypervisor/devicemodel/core/pm.c

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/*
* Copyright (C) 2018-2022 Intel Corporation.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdio.h>
#include <stdbool.h>
#include <pthread.h>
#include "vmmapi.h"
#include "log.h"
static pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t suspend_mutex = PTHREAD_MUTEX_INITIALIZER;
int
wait_for_resume(struct vmctx *ctx)
{
pthread_mutex_lock(&suspend_mutex);
while (vm_get_suspend_mode() == VM_SUSPEND_SUSPEND) {
pthread_cond_wait(&suspend_cond, &suspend_mutex);
}
pthread_mutex_unlock(&suspend_mutex);
return 0;
}
int
vm_resume(struct vmctx *ctx)
{
pthread_mutex_lock(&suspend_mutex);
pr_info("%s: setting VM state to %s\n", __func__, vm_state_to_str(VM_SUSPEND_NONE));
vm_set_suspend_mode(VM_SUSPEND_NONE);
pthread_cond_signal(&suspend_cond);
pthread_mutex_unlock(&suspend_mutex);
return 0;
}
int
vm_monitor_resume(void *arg)
{
struct vmctx *ctx = (struct vmctx *)arg;
vm_resume(ctx);
return 0;
}
int
vm_monitor_query(void *arg)
{
return vm_get_suspend_mode();
}