1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License, version 2, as
4  * published by the Free Software Foundation.
5  *
6  * This program is distributed in the hope that it will be useful,
7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9  * GNU General Public License for more details.
10  *
11  * You should have received a copy of the GNU General Public License
12  * along with this program; if not, write to the Free Software
13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14  *
15  * Copyright IBM Corp. 2008
16  *
17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18  */
19 #ifndef __POWERPC_KVM_PARA_H__
20 #define __POWERPC_KVM_PARA_H__
21 
22 #include <uapi/asm/kvm_para.h>
23 
24 #ifdef CONFIG_KVM_GUEST
25 
26 #include <linux/of.h>
27 
28 static inline int kvm_para_available(void)
29 {
30 	struct device_node *hyper_node;
31 
32 	hyper_node = of_find_node_by_path("/hypervisor");
33 	if (!hyper_node)
34 		return 0;
35 
36 	if (!of_device_is_compatible(hyper_node, "linux,kvm"))
37 		return 0;
38 
39 	return 1;
40 }
41 
42 #else
43 
44 static inline int kvm_para_available(void)
45 {
46 	return 0;
47 }
48 
49 #endif
50 
51 static inline unsigned int kvm_arch_para_features(void)
52 {
53 	unsigned long r;
54 
55 	if (!kvm_para_available())
56 		return 0;
57 
58 	if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
59 		return 0;
60 
61 	return r;
62 }
63 
64 static inline bool kvm_check_and_clear_guest_paused(void)
65 {
66 	return false;
67 }
68 
69 #endif /* __POWERPC_KVM_PARA_H__ */
70