1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * definition for kvm on s390 4 * 5 * Copyright IBM Corp. 2008, 2009 6 * 7 * Author(s): Carsten Otte <cotte@de.ibm.com> 8 * Christian Borntraeger <borntraeger@de.ibm.com> 9 * Christian Ehrhardt <ehrhardt@de.ibm.com> 10 */ 11 12 #ifndef ARCH_S390_KVM_S390_H 13 #define ARCH_S390_KVM_S390_H 14 15 #include <linux/hrtimer.h> 16 #include <linux/kvm.h> 17 #include <linux/kvm_host.h> 18 #include <asm/facility.h> 19 #include <asm/processor.h> 20 #include <asm/sclp.h> 21 22 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); 23 24 /* Transactional Memory Execution related macros */ 25 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE)) 26 #define TDB_FORMAT1 1 27 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 28 29 extern debug_info_t *kvm_s390_dbf; 30 #define KVM_EVENT(d_loglevel, d_string, d_args...)\ 31 do { \ 32 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 33 d_args); \ 34 } while (0) 35 36 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 37 do { \ 38 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 39 d_args); \ 40 } while (0) 41 42 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 43 do { \ 44 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 45 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 46 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 47 d_args); \ 48 } while (0) 49 50 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 51 { 52 atomic_or(flags, &vcpu->arch.sie_block->cpuflags); 53 } 54 55 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 56 { 57 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags); 58 } 59 60 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 61 { 62 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags; 63 } 64 65 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 66 { 67 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED); 68 } 69 70 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 71 { 72 return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask); 73 } 74 75 static inline int kvm_is_ucontrol(struct kvm *kvm) 76 { 77 #ifdef CONFIG_KVM_S390_UCONTROL 78 if (kvm->arch.gmap) 79 return 0; 80 return 1; 81 #else 82 return 0; 83 #endif 84 } 85 86 #define GUEST_PREFIX_SHIFT 13 87 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 88 { 89 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 90 } 91 92 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 93 { 94 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 95 prefix); 96 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 97 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 98 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 99 } 100 101 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 102 { 103 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 104 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 105 106 if (ar) 107 *ar = base2; 108 109 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 110 } 111 112 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 113 u64 *address1, u64 *address2, 114 u8 *ar_b1, u8 *ar_b2) 115 { 116 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 117 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 118 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 119 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 120 121 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 122 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 123 124 if (ar_b1) 125 *ar_b1 = base1; 126 if (ar_b2) 127 *ar_b2 = base2; 128 } 129 130 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 131 { 132 if (r1) 133 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 134 if (r2) 135 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 136 } 137 138 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 139 { 140 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 141 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 142 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 143 /* The displacement is a 20bit _SIGNED_ value */ 144 if (disp2 & 0x80000) 145 disp2+=0xfff00000; 146 147 if (ar) 148 *ar = base2; 149 150 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 151 } 152 153 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) 154 { 155 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 156 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 157 158 if (ar) 159 *ar = base2; 160 161 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 162 } 163 164 /* Set the condition code in the guest program status word */ 165 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 166 { 167 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 168 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 169 } 170 171 /* test availability of facility in a kvm instance */ 172 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 173 { 174 return __test_facility(nr, kvm->arch.model.fac_mask) && 175 __test_facility(nr, kvm->arch.model.fac_list); 176 } 177 178 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 179 { 180 unsigned char *ptr; 181 182 if (nr >= MAX_FACILITY_BIT) 183 return -EINVAL; 184 ptr = (unsigned char *) fac_list + (nr >> 3); 185 *ptr |= (0x80UL >> (nr & 7)); 186 return 0; 187 } 188 189 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 190 { 191 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 192 return test_bit_inv(nr, kvm->arch.cpu_feat); 193 } 194 195 /* are cpu states controlled by user space */ 196 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 197 { 198 return kvm->arch.user_cpu_state_ctrl != 0; 199 } 200 201 /* implemented in interrupt.c */ 202 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 203 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 204 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 205 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 206 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 207 void kvm_s390_clear_float_irqs(struct kvm *kvm); 208 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 209 struct kvm_s390_interrupt *s390int); 210 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 211 struct kvm_s390_irq *irq); 212 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 213 struct kvm_s390_pgm_info *pgm_info) 214 { 215 struct kvm_s390_irq irq = { 216 .type = KVM_S390_PROGRAM_INT, 217 .u.pgm = *pgm_info, 218 }; 219 220 return kvm_s390_inject_vcpu(vcpu, &irq); 221 } 222 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 223 { 224 struct kvm_s390_irq irq = { 225 .type = KVM_S390_PROGRAM_INT, 226 .u.pgm.code = code, 227 }; 228 229 return kvm_s390_inject_vcpu(vcpu, &irq); 230 } 231 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 232 u64 isc_mask, u32 schid); 233 int kvm_s390_reinject_io_int(struct kvm *kvm, 234 struct kvm_s390_interrupt_info *inti); 235 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 236 237 /* implemented in intercept.c */ 238 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 239 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 240 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 241 { 242 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 243 244 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 245 } 246 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 247 { 248 kvm_s390_rewind_psw(vcpu, -ilen); 249 } 250 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 251 { 252 /* don't inject PER events if we re-execute the instruction */ 253 vcpu->arch.sie_block->icptstatus &= ~0x02; 254 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 255 } 256 257 int handle_sthyi(struct kvm_vcpu *vcpu); 258 259 /* implemented in priv.c */ 260 int is_valid_psw(psw_t *psw); 261 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 262 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 263 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu); 264 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 265 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 266 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 267 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 268 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 269 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 270 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 271 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); 272 273 /* implemented in vsie.c */ 274 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 275 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 276 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 277 unsigned long end); 278 void kvm_s390_vsie_init(struct kvm *kvm); 279 void kvm_s390_vsie_destroy(struct kvm *kvm); 280 281 /* implemented in sigp.c */ 282 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 283 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 284 285 /* implemented in kvm-s390.c */ 286 void kvm_s390_set_tod_clock_ext(struct kvm *kvm, 287 const struct kvm_s390_vm_tod_clock *gtod); 288 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod); 289 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 290 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 291 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 292 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 293 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 294 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 295 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 296 void exit_sie(struct kvm_vcpu *vcpu); 297 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 298 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 299 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 300 unsigned long kvm_s390_fac_list_mask_size(void); 301 extern unsigned long kvm_s390_fac_list_mask[]; 302 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 303 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 304 305 /* implemented in diag.c */ 306 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 307 308 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 309 { 310 int i; 311 struct kvm_vcpu *vcpu; 312 313 WARN_ON(!mutex_is_locked(&kvm->lock)); 314 kvm_for_each_vcpu(i, vcpu, kvm) 315 kvm_s390_vcpu_block(vcpu); 316 } 317 318 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 319 { 320 int i; 321 struct kvm_vcpu *vcpu; 322 323 kvm_for_each_vcpu(i, vcpu, kvm) 324 kvm_s390_vcpu_unblock(vcpu); 325 } 326 327 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 328 { 329 u64 rc; 330 331 preempt_disable(); 332 rc = get_tod_clock_fast() + kvm->arch.epoch; 333 preempt_enable(); 334 return rc; 335 } 336 337 /** 338 * kvm_s390_inject_prog_cond - conditionally inject a program check 339 * @vcpu: virtual cpu 340 * @rc: original return/error code 341 * 342 * This function is supposed to be used after regular guest access functions 343 * failed, to conditionally inject a program check to a vcpu. The typical 344 * pattern would look like 345 * 346 * rc = write_guest(vcpu, addr, data, len); 347 * if (rc) 348 * return kvm_s390_inject_prog_cond(vcpu, rc); 349 * 350 * A negative return code from guest access functions implies an internal error 351 * like e.g. out of memory. In these cases no program check should be injected 352 * to the guest. 353 * A positive value implies that an exception happened while accessing a guest's 354 * memory. In this case all data belonging to the corresponding program check 355 * has been stored in vcpu->arch.pgm and can be injected with 356 * kvm_s390_inject_prog_irq(). 357 * 358 * Returns: - the original @rc value if @rc was negative (internal error) 359 * - zero if @rc was already zero 360 * - zero or error code from injecting if @rc was positive 361 * (program check injected to @vcpu) 362 */ 363 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 364 { 365 if (rc <= 0) 366 return rc; 367 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 368 } 369 370 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 371 struct kvm_s390_irq *s390irq); 372 373 /* implemented in interrupt.c */ 374 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 375 int psw_extint_disabled(struct kvm_vcpu *vcpu); 376 void kvm_s390_destroy_adapters(struct kvm *kvm); 377 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 378 extern struct kvm_device_ops kvm_flic_ops; 379 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 380 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 381 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 382 void __user *buf, int len); 383 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 384 __u8 __user *buf, int len); 385 void kvm_s390_gisa_init(struct kvm *kvm); 386 void kvm_s390_gisa_clear(struct kvm *kvm); 387 void kvm_s390_gisa_destroy(struct kvm *kvm); 388 389 /* implemented in guestdbg.c */ 390 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 391 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 392 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 393 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 394 struct kvm_guest_debug *dbg); 395 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 396 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 397 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 398 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 399 400 /* support for Basic/Extended SCA handling */ 401 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 402 { 403 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 404 405 return &sca->ipte_control; 406 } 407 static inline int kvm_s390_use_sca_entries(void) 408 { 409 /* 410 * Without SIGP interpretation, only SRS interpretation (if available) 411 * might use the entries. By not setting the entries and keeping them 412 * invalid, hardware will not access them but intercept. 413 */ 414 return sclp.has_sigpif; 415 } 416 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 417 struct mcck_volatile_info *mcck_info); 418 #endif 419