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 /* Transactional Memory Execution related macros */ 23 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE)) 24 #define TDB_FORMAT1 1 25 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 26 27 extern debug_info_t *kvm_s390_dbf; 28 #define KVM_EVENT(d_loglevel, d_string, d_args...)\ 29 do { \ 30 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 31 d_args); \ 32 } while (0) 33 34 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 35 do { \ 36 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 37 d_args); \ 38 } while (0) 39 40 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 41 do { \ 42 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 43 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 44 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 45 d_args); \ 46 } while (0) 47 48 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 49 { 50 atomic_or(flags, &vcpu->arch.sie_block->cpuflags); 51 } 52 53 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 54 { 55 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags); 56 } 57 58 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 59 { 60 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags; 61 } 62 63 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 64 { 65 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED); 66 } 67 68 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 69 { 70 return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask); 71 } 72 73 static inline int kvm_is_ucontrol(struct kvm *kvm) 74 { 75 #ifdef CONFIG_KVM_S390_UCONTROL 76 if (kvm->arch.gmap) 77 return 0; 78 return 1; 79 #else 80 return 0; 81 #endif 82 } 83 84 #define GUEST_PREFIX_SHIFT 13 85 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 86 { 87 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 88 } 89 90 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 91 { 92 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 93 prefix); 94 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 95 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 96 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 97 } 98 99 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 100 { 101 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 102 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 103 104 if (ar) 105 *ar = base2; 106 107 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 108 } 109 110 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 111 u64 *address1, u64 *address2, 112 u8 *ar_b1, u8 *ar_b2) 113 { 114 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 115 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 116 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 117 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 118 119 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 120 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 121 122 if (ar_b1) 123 *ar_b1 = base1; 124 if (ar_b2) 125 *ar_b2 = base2; 126 } 127 128 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 129 { 130 if (r1) 131 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 132 if (r2) 133 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 134 } 135 136 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 137 { 138 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 139 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 140 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 141 /* The displacement is a 20bit _SIGNED_ value */ 142 if (disp2 & 0x80000) 143 disp2+=0xfff00000; 144 145 if (ar) 146 *ar = base2; 147 148 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 149 } 150 151 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) 152 { 153 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 154 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 155 156 if (ar) 157 *ar = base2; 158 159 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 160 } 161 162 /* Set the condition code in the guest program status word */ 163 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 164 { 165 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 166 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 167 } 168 169 /* test availability of facility in a kvm instance */ 170 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 171 { 172 return __test_facility(nr, kvm->arch.model.fac_mask) && 173 __test_facility(nr, kvm->arch.model.fac_list); 174 } 175 176 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 177 { 178 unsigned char *ptr; 179 180 if (nr >= MAX_FACILITY_BIT) 181 return -EINVAL; 182 ptr = (unsigned char *) fac_list + (nr >> 3); 183 *ptr |= (0x80UL >> (nr & 7)); 184 return 0; 185 } 186 187 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 188 { 189 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 190 return test_bit_inv(nr, kvm->arch.cpu_feat); 191 } 192 193 /* are cpu states controlled by user space */ 194 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 195 { 196 return kvm->arch.user_cpu_state_ctrl != 0; 197 } 198 199 /* implemented in interrupt.c */ 200 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 201 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 202 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 203 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 204 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 205 void kvm_s390_clear_float_irqs(struct kvm *kvm); 206 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 207 struct kvm_s390_interrupt *s390int); 208 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 209 struct kvm_s390_irq *irq); 210 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 211 struct kvm_s390_pgm_info *pgm_info) 212 { 213 struct kvm_s390_irq irq = { 214 .type = KVM_S390_PROGRAM_INT, 215 .u.pgm = *pgm_info, 216 }; 217 218 return kvm_s390_inject_vcpu(vcpu, &irq); 219 } 220 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 221 { 222 struct kvm_s390_irq irq = { 223 .type = KVM_S390_PROGRAM_INT, 224 .u.pgm.code = code, 225 }; 226 227 return kvm_s390_inject_vcpu(vcpu, &irq); 228 } 229 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 230 u64 isc_mask, u32 schid); 231 int kvm_s390_reinject_io_int(struct kvm *kvm, 232 struct kvm_s390_interrupt_info *inti); 233 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 234 235 /* implemented in intercept.c */ 236 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 237 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 238 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 239 { 240 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 241 242 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 243 } 244 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 245 { 246 kvm_s390_rewind_psw(vcpu, -ilen); 247 } 248 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 249 { 250 /* don't inject PER events if we re-execute the instruction */ 251 vcpu->arch.sie_block->icptstatus &= ~0x02; 252 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 253 } 254 255 int handle_sthyi(struct kvm_vcpu *vcpu); 256 257 /* implemented in priv.c */ 258 int is_valid_psw(psw_t *psw); 259 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 260 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 261 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu); 262 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 263 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 264 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 265 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 266 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 267 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 268 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 269 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); 270 271 /* implemented in vsie.c */ 272 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 273 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 274 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 275 unsigned long end); 276 void kvm_s390_vsie_init(struct kvm *kvm); 277 void kvm_s390_vsie_destroy(struct kvm *kvm); 278 279 /* implemented in sigp.c */ 280 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 281 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 282 283 /* implemented in kvm-s390.c */ 284 void kvm_s390_set_tod_clock(struct kvm *kvm, 285 const struct kvm_s390_vm_tod_clock *gtod); 286 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 287 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 288 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 289 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 290 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 291 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 292 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 293 void exit_sie(struct kvm_vcpu *vcpu); 294 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 295 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 296 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 297 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 298 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 299 300 /* implemented in diag.c */ 301 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 302 303 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 304 { 305 int i; 306 struct kvm_vcpu *vcpu; 307 308 WARN_ON(!mutex_is_locked(&kvm->lock)); 309 kvm_for_each_vcpu(i, vcpu, kvm) 310 kvm_s390_vcpu_block(vcpu); 311 } 312 313 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 314 { 315 int i; 316 struct kvm_vcpu *vcpu; 317 318 kvm_for_each_vcpu(i, vcpu, kvm) 319 kvm_s390_vcpu_unblock(vcpu); 320 } 321 322 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 323 { 324 u64 rc; 325 326 preempt_disable(); 327 rc = get_tod_clock_fast() + kvm->arch.epoch; 328 preempt_enable(); 329 return rc; 330 } 331 332 /** 333 * kvm_s390_inject_prog_cond - conditionally inject a program check 334 * @vcpu: virtual cpu 335 * @rc: original return/error code 336 * 337 * This function is supposed to be used after regular guest access functions 338 * failed, to conditionally inject a program check to a vcpu. The typical 339 * pattern would look like 340 * 341 * rc = write_guest(vcpu, addr, data, len); 342 * if (rc) 343 * return kvm_s390_inject_prog_cond(vcpu, rc); 344 * 345 * A negative return code from guest access functions implies an internal error 346 * like e.g. out of memory. In these cases no program check should be injected 347 * to the guest. 348 * A positive value implies that an exception happened while accessing a guest's 349 * memory. In this case all data belonging to the corresponding program check 350 * has been stored in vcpu->arch.pgm and can be injected with 351 * kvm_s390_inject_prog_irq(). 352 * 353 * Returns: - the original @rc value if @rc was negative (internal error) 354 * - zero if @rc was already zero 355 * - zero or error code from injecting if @rc was positive 356 * (program check injected to @vcpu) 357 */ 358 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 359 { 360 if (rc <= 0) 361 return rc; 362 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 363 } 364 365 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 366 struct kvm_s390_irq *s390irq); 367 368 /* implemented in interrupt.c */ 369 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 370 int psw_extint_disabled(struct kvm_vcpu *vcpu); 371 void kvm_s390_destroy_adapters(struct kvm *kvm); 372 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 373 extern struct kvm_device_ops kvm_flic_ops; 374 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 375 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 376 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 377 void __user *buf, int len); 378 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 379 __u8 __user *buf, int len); 380 void kvm_s390_gisa_init(struct kvm *kvm); 381 void kvm_s390_gisa_clear(struct kvm *kvm); 382 void kvm_s390_gisa_destroy(struct kvm *kvm); 383 384 /* implemented in guestdbg.c */ 385 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 386 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 387 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 388 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 389 struct kvm_guest_debug *dbg); 390 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 391 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 392 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 393 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 394 395 /* support for Basic/Extended SCA handling */ 396 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 397 { 398 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 399 400 return &sca->ipte_control; 401 } 402 static inline int kvm_s390_use_sca_entries(void) 403 { 404 /* 405 * Without SIGP interpretation, only SRS interpretation (if available) 406 * might use the entries. By not setting the entries and keeping them 407 * invalid, hardware will not access them but intercept. 408 */ 409 return sclp.has_sigpif; 410 } 411 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 412 struct mcck_volatile_info *mcck_info); 413 414 /** 415 * kvm_s390_vcpu_crypto_reset_all 416 * 417 * Reset the crypto attributes for each vcpu. This can be done while the vcpus 418 * are running as each vcpu will be removed from SIE before resetting the crypt 419 * attributes and restored to SIE afterward. 420 * 421 * Note: The kvm->lock must be held while calling this function 422 * 423 * @kvm: the KVM guest 424 */ 425 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm); 426 #endif 427