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