/*
 * Copyright (C) 2020-2023 Intel Corporation.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <errno.h>
#include <util.h>
#include <acrn_hv_defs.h>
#include <asm/guest/vm.h>
#include <vm_event.h>
#include <sbuf.h>

int32_t init_vm_event(struct acrn_vm *vm, uint64_t *hva)
{
	struct shared_buf *sbuf = (struct shared_buf *)hva;
	int ret = -1;

	stac();
	if (sbuf != NULL) {
		if (sbuf->magic == SBUF_MAGIC) {
			vm->sw.vm_event_sbuf = sbuf;
			spinlock_init(&vm->vm_event_lock);
			ret = 0;
		}
	}
	clac();

	return ret;
}

int32_t send_vm_event(struct acrn_vm *vm, struct vm_event *event)
{
	struct shared_buf *sbuf = (struct shared_buf *)vm->sw.vm_event_sbuf;
	int32_t ret = -ENODEV;
	uint32_t size_sent;

	if (sbuf != NULL) {
		spinlock_obtain(&vm->vm_event_lock);
		size_sent = sbuf_put(sbuf, (uint8_t *)event, sizeof(*event));
		spinlock_release(&vm->vm_event_lock);
		if (size_sent == sizeof(struct vm_event)) {
			arch_fire_hsm_interrupt();
			ret = 0;
		}
	}
	return ret;
}