1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *
4  * Copyright IBM Corp. 2008
5  *
6  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
7  */
8 #ifndef __POWERPC_KVM_PARA_H__
9 #define __POWERPC_KVM_PARA_H__
10 
11 #include <uapi/asm/kvm_para.h>
12 
13 #ifdef CONFIG_KVM_GUEST
14 
15 #include <linux/of.h>
16 
17 static inline int kvm_para_available(void)
18 {
19 	struct device_node *hyper_node;
20 
21 	hyper_node = of_find_node_by_path("/hypervisor");
22 	if (!hyper_node)
23 		return 0;
24 
25 	if (!of_device_is_compatible(hyper_node, "linux,kvm"))
26 		return 0;
27 
28 	return 1;
29 }
30 
31 #else
32 
33 static inline int kvm_para_available(void)
34 {
35 	return 0;
36 }
37 
38 #endif
39 
40 static inline unsigned int kvm_arch_para_features(void)
41 {
42 	unsigned long r;
43 
44 	if (!kvm_para_available())
45 		return 0;
46 
47 	if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
48 		return 0;
49 
50 	return r;
51 }
52 
53 static inline unsigned int kvm_arch_para_hints(void)
54 {
55 	return 0;
56 }
57 
58 static inline bool kvm_check_and_clear_guest_paused(void)
59 {
60 	return false;
61 }
62 
63 #endif /* __POWERPC_KVM_PARA_H__ */
64