linux_kernel/drivers/gpu/drm/i915/gvt/mpt.h

/*
 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _GVT_MPT_H_
#define _GVT_MPT_H_

/**
 * DOC: Hypervisor Service APIs for GVT-g Core Logic
 *
 * This is the glue layer between specific hypervisor MPT modules and GVT-g core
 * logic. Each kind of hypervisor MPT module provides a collection of function
 * callbacks and will be attached to GVT host when the driver is loading.
 * GVT-g core logic will call these APIs to request specific services from
 * hypervisor.
 */

/**
 * intel_gvt_hypervisor_detect_host - check if GVT-g is running within
 * hypervisor host/privilged domain
 *
 * Returns:
 * Zero on success, -ENODEV if current kernel is running inside a VM
 */
static inline int intel_gvt_hypervisor_detect_host(void)
{
	return intel_gvt_host.mpt->detect_host();
}

#endif /* _GVT_MPT_H_ */