1 /* 2 * definition for kvm on s390 3 * 4 * Copyright IBM Corp. 2008, 2009 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License (version 2 only) 8 * as published by the Free Software Foundation. 9 * 10 * Author(s): Carsten Otte <cotte@de.ibm.com> 11 * Christian Borntraeger <borntraeger@de.ibm.com> 12 * Christian Ehrhardt <ehrhardt@de.ibm.com> 13 */ 14 15 #ifndef ARCH_S390_KVM_S390_H 16 #define ARCH_S390_KVM_S390_H 17 18 #include <linux/hrtimer.h> 19 #include <linux/kvm.h> 20 #include <linux/kvm_host.h> 21 #include <asm/facility.h> 22 #include <asm/processor.h> 23 #include <asm/sclp.h> 24 25 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); 26 27 /* Transactional Memory Execution related macros */ 28 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10)) 29 #define TDB_FORMAT1 1 30 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 31 32 extern debug_info_t *kvm_s390_dbf; 33 #define KVM_EVENT(d_loglevel, d_string, d_args...)\ 34 do { \ 35 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 36 d_args); \ 37 } while (0) 38 39 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 40 do { \ 41 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 42 d_args); \ 43 } while (0) 44 45 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 46 do { \ 47 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 48 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 49 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 50 d_args); \ 51 } while (0) 52 53 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 54 { 55 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 56 } 57 58 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 59 { 60 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); 61 } 62 63 static inline int kvm_is_ucontrol(struct kvm *kvm) 64 { 65 #ifdef CONFIG_KVM_S390_UCONTROL 66 if (kvm->arch.gmap) 67 return 0; 68 return 1; 69 #else 70 return 0; 71 #endif 72 } 73 74 #define GUEST_PREFIX_SHIFT 13 75 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 76 { 77 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 78 } 79 80 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 81 { 82 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 83 prefix); 84 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 85 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 86 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 87 } 88 89 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 90 { 91 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 92 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 93 94 if (ar) 95 *ar = base2; 96 97 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 98 } 99 100 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 101 u64 *address1, u64 *address2, 102 u8 *ar_b1, u8 *ar_b2) 103 { 104 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 105 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 106 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 107 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 108 109 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 110 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 111 112 if (ar_b1) 113 *ar_b1 = base1; 114 if (ar_b2) 115 *ar_b2 = base2; 116 } 117 118 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 119 { 120 if (r1) 121 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 122 if (r2) 123 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 124 } 125 126 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 127 { 128 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 129 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 130 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 131 /* The displacement is a 20bit _SIGNED_ value */ 132 if (disp2 & 0x80000) 133 disp2+=0xfff00000; 134 135 if (ar) 136 *ar = base2; 137 138 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 139 } 140 141 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) 142 { 143 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 144 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 145 146 if (ar) 147 *ar = base2; 148 149 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 150 } 151 152 /* Set the condition code in the guest program status word */ 153 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 154 { 155 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 156 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 157 } 158 159 /* test availability of facility in a kvm instance */ 160 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 161 { 162 return __test_facility(nr, kvm->arch.model.fac_mask) && 163 __test_facility(nr, kvm->arch.model.fac_list); 164 } 165 166 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 167 { 168 unsigned char *ptr; 169 170 if (nr >= MAX_FACILITY_BIT) 171 return -EINVAL; 172 ptr = (unsigned char *) fac_list + (nr >> 3); 173 *ptr |= (0x80UL >> (nr & 7)); 174 return 0; 175 } 176 177 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 178 { 179 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 180 return test_bit_inv(nr, kvm->arch.cpu_feat); 181 } 182 183 /* are cpu states controlled by user space */ 184 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 185 { 186 return kvm->arch.user_cpu_state_ctrl != 0; 187 } 188 189 /* implemented in interrupt.c */ 190 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 191 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 192 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 193 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 194 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 195 void kvm_s390_clear_float_irqs(struct kvm *kvm); 196 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 197 struct kvm_s390_interrupt *s390int); 198 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 199 struct kvm_s390_irq *irq); 200 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 201 struct kvm_s390_pgm_info *pgm_info) 202 { 203 struct kvm_s390_irq irq = { 204 .type = KVM_S390_PROGRAM_INT, 205 .u.pgm = *pgm_info, 206 }; 207 208 return kvm_s390_inject_vcpu(vcpu, &irq); 209 } 210 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 211 { 212 struct kvm_s390_irq irq = { 213 .type = KVM_S390_PROGRAM_INT, 214 .u.pgm.code = code, 215 }; 216 217 return kvm_s390_inject_vcpu(vcpu, &irq); 218 } 219 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 220 u64 isc_mask, u32 schid); 221 int kvm_s390_reinject_io_int(struct kvm *kvm, 222 struct kvm_s390_interrupt_info *inti); 223 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 224 225 /* implemented in intercept.c */ 226 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 227 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 228 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 229 { 230 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 231 232 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 233 } 234 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 235 { 236 kvm_s390_rewind_psw(vcpu, -ilen); 237 } 238 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 239 { 240 /* don't inject PER events if we re-execute the instruction */ 241 vcpu->arch.sie_block->icptstatus &= ~0x02; 242 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 243 } 244 245 /* implemented in priv.c */ 246 int is_valid_psw(psw_t *psw); 247 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 248 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 249 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 250 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 251 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 252 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 253 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 254 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 255 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 256 257 /* implemented in vsie.c */ 258 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 259 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 260 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 261 unsigned long end); 262 void kvm_s390_vsie_init(struct kvm *kvm); 263 void kvm_s390_vsie_destroy(struct kvm *kvm); 264 265 /* implemented in sigp.c */ 266 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 267 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 268 269 /* implemented in sthyi.c */ 270 int handle_sthyi(struct kvm_vcpu *vcpu); 271 272 /* implemented in kvm-s390.c */ 273 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod); 274 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 275 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 276 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 277 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 278 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 279 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 280 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 281 void exit_sie(struct kvm_vcpu *vcpu); 282 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 283 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 284 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 285 unsigned long kvm_s390_fac_list_mask_size(void); 286 extern unsigned long kvm_s390_fac_list_mask[]; 287 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 288 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 289 290 /* implemented in diag.c */ 291 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 292 293 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 294 { 295 int i; 296 struct kvm_vcpu *vcpu; 297 298 WARN_ON(!mutex_is_locked(&kvm->lock)); 299 kvm_for_each_vcpu(i, vcpu, kvm) 300 kvm_s390_vcpu_block(vcpu); 301 } 302 303 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 304 { 305 int i; 306 struct kvm_vcpu *vcpu; 307 308 kvm_for_each_vcpu(i, vcpu, kvm) 309 kvm_s390_vcpu_unblock(vcpu); 310 } 311 312 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 313 { 314 u64 rc; 315 316 preempt_disable(); 317 rc = get_tod_clock_fast() + kvm->arch.epoch; 318 preempt_enable(); 319 return rc; 320 } 321 322 /** 323 * kvm_s390_inject_prog_cond - conditionally inject a program check 324 * @vcpu: virtual cpu 325 * @rc: original return/error code 326 * 327 * This function is supposed to be used after regular guest access functions 328 * failed, to conditionally inject a program check to a vcpu. The typical 329 * pattern would look like 330 * 331 * rc = write_guest(vcpu, addr, data, len); 332 * if (rc) 333 * return kvm_s390_inject_prog_cond(vcpu, rc); 334 * 335 * A negative return code from guest access functions implies an internal error 336 * like e.g. out of memory. In these cases no program check should be injected 337 * to the guest. 338 * A positive value implies that an exception happened while accessing a guest's 339 * memory. In this case all data belonging to the corresponding program check 340 * has been stored in vcpu->arch.pgm and can be injected with 341 * kvm_s390_inject_prog_irq(). 342 * 343 * Returns: - the original @rc value if @rc was negative (internal error) 344 * - zero if @rc was already zero 345 * - zero or error code from injecting if @rc was positive 346 * (program check injected to @vcpu) 347 */ 348 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 349 { 350 if (rc <= 0) 351 return rc; 352 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 353 } 354 355 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 356 struct kvm_s390_irq *s390irq); 357 358 /* implemented in interrupt.c */ 359 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 360 int psw_extint_disabled(struct kvm_vcpu *vcpu); 361 void kvm_s390_destroy_adapters(struct kvm *kvm); 362 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 363 extern struct kvm_device_ops kvm_flic_ops; 364 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 365 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 366 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 367 void __user *buf, int len); 368 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 369 __u8 __user *buf, int len); 370 371 /* implemented in guestdbg.c */ 372 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 373 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 374 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 375 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 376 struct kvm_guest_debug *dbg); 377 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 378 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 379 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 380 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 381 382 /* support for Basic/Extended SCA handling */ 383 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 384 { 385 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 386 387 return &sca->ipte_control; 388 } 389 static inline int kvm_s390_use_sca_entries(void) 390 { 391 /* 392 * Without SIGP interpretation, only SRS interpretation (if available) 393 * might use the entries. By not setting the entries and keeping them 394 * invalid, hardware will not access them but intercept. 395 */ 396 return sclp.has_sigpif; 397 } 398 #endif 399