1b8b572e1SStephen Rothwell /* 2b8b572e1SStephen Rothwell * This program is free software; you can redistribute it and/or modify 3b8b572e1SStephen Rothwell * it under the terms of the GNU General Public License, version 2, as 4b8b572e1SStephen Rothwell * published by the Free Software Foundation. 5b8b572e1SStephen Rothwell * 6b8b572e1SStephen Rothwell * This program is distributed in the hope that it will be useful, 7b8b572e1SStephen Rothwell * but WITHOUT ANY WARRANTY; without even the implied warranty of 8b8b572e1SStephen Rothwell * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9b8b572e1SStephen Rothwell * GNU General Public License for more details. 10b8b572e1SStephen Rothwell * 11b8b572e1SStephen Rothwell * You should have received a copy of the GNU General Public License 12b8b572e1SStephen Rothwell * along with this program; if not, write to the Free Software 13b8b572e1SStephen Rothwell * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14b8b572e1SStephen Rothwell * 15b8b572e1SStephen Rothwell * Copyright IBM Corp. 2008 16b8b572e1SStephen Rothwell * 17b8b572e1SStephen Rothwell * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18b8b572e1SStephen Rothwell */ 19b8b572e1SStephen Rothwell 20b8b572e1SStephen Rothwell #ifndef __POWERPC_KVM_PARA_H__ 21b8b572e1SStephen Rothwell #define __POWERPC_KVM_PARA_H__ 22b8b572e1SStephen Rothwell 2396bc451aSAlexander Graf #include <linux/types.h> 242a342ed5SAlexander Graf #include <linux/of.h> 2596bc451aSAlexander Graf 2696bc451aSAlexander Graf struct kvm_vcpu_arch_shared { 27a73a9599SAlexander Graf __u64 sprg0; 28a73a9599SAlexander Graf __u64 sprg1; 29a73a9599SAlexander Graf __u64 sprg2; 30a73a9599SAlexander Graf __u64 sprg3; 31de7906c3SAlexander Graf __u64 srr0; 32de7906c3SAlexander Graf __u64 srr1; 335e030186SAlexander Graf __u64 dar; 34666e7252SAlexander Graf __u64 msr; 35d562de48SAlexander Graf __u32 dsisr; 3696bc451aSAlexander Graf }; 3796bc451aSAlexander Graf 382a342ed5SAlexander Graf #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ 392a342ed5SAlexander Graf #define HC_VENDOR_KVM (42 << 16) 402a342ed5SAlexander Graf #define HC_EV_SUCCESS 0 412a342ed5SAlexander Graf #define HC_EV_UNIMPLEMENTED 12 422a342ed5SAlexander Graf 43b8b572e1SStephen Rothwell #ifdef __KERNEL__ 44b8b572e1SStephen Rothwell 452a342ed5SAlexander Graf #ifdef CONFIG_KVM_GUEST 462a342ed5SAlexander Graf 472a342ed5SAlexander Graf static inline int kvm_para_available(void) 482a342ed5SAlexander Graf { 492a342ed5SAlexander Graf struct device_node *hyper_node; 502a342ed5SAlexander Graf 512a342ed5SAlexander Graf hyper_node = of_find_node_by_path("/hypervisor"); 522a342ed5SAlexander Graf if (!hyper_node) 532a342ed5SAlexander Graf return 0; 542a342ed5SAlexander Graf 552a342ed5SAlexander Graf if (!of_device_is_compatible(hyper_node, "linux,kvm")) 562a342ed5SAlexander Graf return 0; 572a342ed5SAlexander Graf 582a342ed5SAlexander Graf return 1; 592a342ed5SAlexander Graf } 602a342ed5SAlexander Graf 612a342ed5SAlexander Graf extern unsigned long kvm_hypercall(unsigned long *in, 622a342ed5SAlexander Graf unsigned long *out, 632a342ed5SAlexander Graf unsigned long nr); 642a342ed5SAlexander Graf 652a342ed5SAlexander Graf #else 662a342ed5SAlexander Graf 67b8b572e1SStephen Rothwell static inline int kvm_para_available(void) 68b8b572e1SStephen Rothwell { 69b8b572e1SStephen Rothwell return 0; 70b8b572e1SStephen Rothwell } 71b8b572e1SStephen Rothwell 722a342ed5SAlexander Graf static unsigned long kvm_hypercall(unsigned long *in, 732a342ed5SAlexander Graf unsigned long *out, 742a342ed5SAlexander Graf unsigned long nr) 752a342ed5SAlexander Graf { 762a342ed5SAlexander Graf return HC_EV_UNIMPLEMENTED; 772a342ed5SAlexander Graf } 782a342ed5SAlexander Graf 792a342ed5SAlexander Graf #endif 802a342ed5SAlexander Graf 812a342ed5SAlexander Graf static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2) 822a342ed5SAlexander Graf { 832a342ed5SAlexander Graf unsigned long in[8]; 842a342ed5SAlexander Graf unsigned long out[8]; 852a342ed5SAlexander Graf unsigned long r; 862a342ed5SAlexander Graf 872a342ed5SAlexander Graf r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 882a342ed5SAlexander Graf *r2 = out[0]; 892a342ed5SAlexander Graf 902a342ed5SAlexander Graf return r; 912a342ed5SAlexander Graf } 922a342ed5SAlexander Graf 932a342ed5SAlexander Graf static inline long kvm_hypercall0(unsigned int nr) 942a342ed5SAlexander Graf { 952a342ed5SAlexander Graf unsigned long in[8]; 962a342ed5SAlexander Graf unsigned long out[8]; 972a342ed5SAlexander Graf 982a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 992a342ed5SAlexander Graf } 1002a342ed5SAlexander Graf 1012a342ed5SAlexander Graf static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) 1022a342ed5SAlexander Graf { 1032a342ed5SAlexander Graf unsigned long in[8]; 1042a342ed5SAlexander Graf unsigned long out[8]; 1052a342ed5SAlexander Graf 1062a342ed5SAlexander Graf in[0] = p1; 1072a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1082a342ed5SAlexander Graf } 1092a342ed5SAlexander Graf 1102a342ed5SAlexander Graf static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, 1112a342ed5SAlexander Graf unsigned long p2) 1122a342ed5SAlexander Graf { 1132a342ed5SAlexander Graf unsigned long in[8]; 1142a342ed5SAlexander Graf unsigned long out[8]; 1152a342ed5SAlexander Graf 1162a342ed5SAlexander Graf in[0] = p1; 1172a342ed5SAlexander Graf in[1] = p2; 1182a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1192a342ed5SAlexander Graf } 1202a342ed5SAlexander Graf 1212a342ed5SAlexander Graf static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, 1222a342ed5SAlexander Graf unsigned long p2, unsigned long p3) 1232a342ed5SAlexander Graf { 1242a342ed5SAlexander Graf unsigned long in[8]; 1252a342ed5SAlexander Graf unsigned long out[8]; 1262a342ed5SAlexander Graf 1272a342ed5SAlexander Graf in[0] = p1; 1282a342ed5SAlexander Graf in[1] = p2; 1292a342ed5SAlexander Graf in[2] = p3; 1302a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1312a342ed5SAlexander Graf } 1322a342ed5SAlexander Graf 1332a342ed5SAlexander Graf static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, 1342a342ed5SAlexander Graf unsigned long p2, unsigned long p3, 1352a342ed5SAlexander Graf unsigned long p4) 1362a342ed5SAlexander Graf { 1372a342ed5SAlexander Graf unsigned long in[8]; 1382a342ed5SAlexander Graf unsigned long out[8]; 1392a342ed5SAlexander Graf 1402a342ed5SAlexander Graf in[0] = p1; 1412a342ed5SAlexander Graf in[1] = p2; 1422a342ed5SAlexander Graf in[2] = p3; 1432a342ed5SAlexander Graf in[3] = p4; 1442a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1452a342ed5SAlexander Graf } 1462a342ed5SAlexander Graf 1472a342ed5SAlexander Graf 148b8b572e1SStephen Rothwell static inline unsigned int kvm_arch_para_features(void) 149b8b572e1SStephen Rothwell { 1502a342ed5SAlexander Graf unsigned long r; 1512a342ed5SAlexander Graf 1522a342ed5SAlexander Graf if (!kvm_para_available()) 153b8b572e1SStephen Rothwell return 0; 1542a342ed5SAlexander Graf 1552a342ed5SAlexander Graf if(kvm_hypercall0_1(KVM_HC_FEATURES, &r)) 1562a342ed5SAlexander Graf return 0; 1572a342ed5SAlexander Graf 1582a342ed5SAlexander Graf return r; 159b8b572e1SStephen Rothwell } 160b8b572e1SStephen Rothwell 161b8b572e1SStephen Rothwell #endif /* __KERNEL__ */ 162b8b572e1SStephen Rothwell 163b8b572e1SStephen Rothwell #endif /* __POWERPC_KVM_PARA_H__ */ 164