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 { 27fad93fe1SAlexander Graf __u64 scratch1; 28fad93fe1SAlexander Graf __u64 scratch2; 29fad93fe1SAlexander Graf __u64 scratch3; 305c6cedf4SAlexander Graf __u64 critical; /* Guest may not get interrupts if == r1 */ 31a73a9599SAlexander Graf __u64 sprg0; 32a73a9599SAlexander Graf __u64 sprg1; 33a73a9599SAlexander Graf __u64 sprg2; 34a73a9599SAlexander Graf __u64 sprg3; 35de7906c3SAlexander Graf __u64 srr0; 36de7906c3SAlexander Graf __u64 srr1; 375e030186SAlexander Graf __u64 dar; 38666e7252SAlexander Graf __u64 msr; 39d562de48SAlexander Graf __u32 dsisr; 4096bc451aSAlexander Graf }; 4196bc451aSAlexander Graf 422a342ed5SAlexander Graf #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ 432a342ed5SAlexander Graf #define HC_VENDOR_KVM (42 << 16) 442a342ed5SAlexander Graf #define HC_EV_SUCCESS 0 452a342ed5SAlexander Graf #define HC_EV_UNIMPLEMENTED 12 462a342ed5SAlexander Graf 47b8b572e1SStephen Rothwell #ifdef __KERNEL__ 48b8b572e1SStephen Rothwell 492a342ed5SAlexander Graf #ifdef CONFIG_KVM_GUEST 502a342ed5SAlexander Graf 512a342ed5SAlexander Graf static inline int kvm_para_available(void) 522a342ed5SAlexander Graf { 532a342ed5SAlexander Graf struct device_node *hyper_node; 542a342ed5SAlexander Graf 552a342ed5SAlexander Graf hyper_node = of_find_node_by_path("/hypervisor"); 562a342ed5SAlexander Graf if (!hyper_node) 572a342ed5SAlexander Graf return 0; 582a342ed5SAlexander Graf 592a342ed5SAlexander Graf if (!of_device_is_compatible(hyper_node, "linux,kvm")) 602a342ed5SAlexander Graf return 0; 612a342ed5SAlexander Graf 622a342ed5SAlexander Graf return 1; 632a342ed5SAlexander Graf } 642a342ed5SAlexander Graf 652a342ed5SAlexander Graf extern unsigned long kvm_hypercall(unsigned long *in, 662a342ed5SAlexander Graf unsigned long *out, 672a342ed5SAlexander Graf unsigned long nr); 682a342ed5SAlexander Graf 692a342ed5SAlexander Graf #else 702a342ed5SAlexander Graf 71b8b572e1SStephen Rothwell static inline int kvm_para_available(void) 72b8b572e1SStephen Rothwell { 73b8b572e1SStephen Rothwell return 0; 74b8b572e1SStephen Rothwell } 75b8b572e1SStephen Rothwell 762a342ed5SAlexander Graf static unsigned long kvm_hypercall(unsigned long *in, 772a342ed5SAlexander Graf unsigned long *out, 782a342ed5SAlexander Graf unsigned long nr) 792a342ed5SAlexander Graf { 802a342ed5SAlexander Graf return HC_EV_UNIMPLEMENTED; 812a342ed5SAlexander Graf } 822a342ed5SAlexander Graf 832a342ed5SAlexander Graf #endif 842a342ed5SAlexander Graf 852a342ed5SAlexander Graf static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2) 862a342ed5SAlexander Graf { 872a342ed5SAlexander Graf unsigned long in[8]; 882a342ed5SAlexander Graf unsigned long out[8]; 892a342ed5SAlexander Graf unsigned long r; 902a342ed5SAlexander Graf 912a342ed5SAlexander Graf r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 922a342ed5SAlexander Graf *r2 = out[0]; 932a342ed5SAlexander Graf 942a342ed5SAlexander Graf return r; 952a342ed5SAlexander Graf } 962a342ed5SAlexander Graf 972a342ed5SAlexander Graf static inline long kvm_hypercall0(unsigned int nr) 982a342ed5SAlexander Graf { 992a342ed5SAlexander Graf unsigned long in[8]; 1002a342ed5SAlexander Graf unsigned long out[8]; 1012a342ed5SAlexander Graf 1022a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1032a342ed5SAlexander Graf } 1042a342ed5SAlexander Graf 1052a342ed5SAlexander Graf static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) 1062a342ed5SAlexander Graf { 1072a342ed5SAlexander Graf unsigned long in[8]; 1082a342ed5SAlexander Graf unsigned long out[8]; 1092a342ed5SAlexander Graf 1102a342ed5SAlexander Graf in[0] = p1; 1112a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1122a342ed5SAlexander Graf } 1132a342ed5SAlexander Graf 1142a342ed5SAlexander Graf static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, 1152a342ed5SAlexander Graf unsigned long p2) 1162a342ed5SAlexander Graf { 1172a342ed5SAlexander Graf unsigned long in[8]; 1182a342ed5SAlexander Graf unsigned long out[8]; 1192a342ed5SAlexander Graf 1202a342ed5SAlexander Graf in[0] = p1; 1212a342ed5SAlexander Graf in[1] = p2; 1222a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1232a342ed5SAlexander Graf } 1242a342ed5SAlexander Graf 1252a342ed5SAlexander Graf static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, 1262a342ed5SAlexander Graf unsigned long p2, unsigned long p3) 1272a342ed5SAlexander Graf { 1282a342ed5SAlexander Graf unsigned long in[8]; 1292a342ed5SAlexander Graf unsigned long out[8]; 1302a342ed5SAlexander Graf 1312a342ed5SAlexander Graf in[0] = p1; 1322a342ed5SAlexander Graf in[1] = p2; 1332a342ed5SAlexander Graf in[2] = p3; 1342a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1352a342ed5SAlexander Graf } 1362a342ed5SAlexander Graf 1372a342ed5SAlexander Graf static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, 1382a342ed5SAlexander Graf unsigned long p2, unsigned long p3, 1392a342ed5SAlexander Graf unsigned long p4) 1402a342ed5SAlexander Graf { 1412a342ed5SAlexander Graf unsigned long in[8]; 1422a342ed5SAlexander Graf unsigned long out[8]; 1432a342ed5SAlexander Graf 1442a342ed5SAlexander Graf in[0] = p1; 1452a342ed5SAlexander Graf in[1] = p2; 1462a342ed5SAlexander Graf in[2] = p3; 1472a342ed5SAlexander Graf in[3] = p4; 1482a342ed5SAlexander Graf return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); 1492a342ed5SAlexander Graf } 1502a342ed5SAlexander Graf 1512a342ed5SAlexander Graf 152b8b572e1SStephen Rothwell static inline unsigned int kvm_arch_para_features(void) 153b8b572e1SStephen Rothwell { 1542a342ed5SAlexander Graf unsigned long r; 1552a342ed5SAlexander Graf 1562a342ed5SAlexander Graf if (!kvm_para_available()) 157b8b572e1SStephen Rothwell return 0; 1582a342ed5SAlexander Graf 1592a342ed5SAlexander Graf if(kvm_hypercall0_1(KVM_HC_FEATURES, &r)) 1602a342ed5SAlexander Graf return 0; 1612a342ed5SAlexander Graf 1622a342ed5SAlexander Graf return r; 163b8b572e1SStephen Rothwell } 164b8b572e1SStephen Rothwell 165b8b572e1SStephen Rothwell #endif /* __KERNEL__ */ 166b8b572e1SStephen Rothwell 167b8b572e1SStephen Rothwell #endif /* __POWERPC_KVM_PARA_H__ */ 168