path: root/arch/powerpc/include/asm/kvm_para.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *
 * Copyright IBM Corp. 2008
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 */
#ifndef __POWERPC_KVM_PARA_H__
#define __POWERPC_KVM_PARA_H__

#include <uapi/asm/kvm_para.h>

#ifdef CONFIG_KVM_GUEST

#include <linux/of.h>

static inline int kvm_para_available(void)
{
	struct device_node *hyper_node;

	hyper_node = of_find_node_by_path("/hypervisor");
	if (!hyper_node)
		return 0;

	if (!of_device_is_compatible(hyper_node, "linux,kvm"))
		return 0;

	return 1;
}

#else

static inline int kvm_para_available(void)
{
	return 0;
}

#endif

static inline unsigned int kvm_arch_para_features(void)
{
	unsigned long r;

	if (!kvm_para_available())
		return 0;

	if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
		return 0;

	return r;
}

static inline unsigned int kvm_arch_para_hints(void)
{
	return 0;
}

static inline bool kvm_check_and_clear_guest_paused(void)
{
	return false;
}

#endif /* __POWERPC_KVM_PARA_H__ */