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 int is_vcpu_stopped(struct kvm_vcpu *vcpu) 51 { 52 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 53 } 54 55 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 56 { 57 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); 58 } 59 60 static inline int kvm_is_ucontrol(struct kvm *kvm) 61 { 62 #ifdef CONFIG_KVM_S390_UCONTROL 63 if (kvm->arch.gmap) 64 return 0; 65 return 1; 66 #else 67 return 0; 68 #endif 69 } 70 71 #define GUEST_PREFIX_SHIFT 13 72 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 73 { 74 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 75 } 76 77 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 78 { 79 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 80 prefix); 81 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 82 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 83 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 84 } 85 86 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 87 { 88 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 89 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 90 91 if (ar) 92 *ar = base2; 93 94 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 95 } 96 97 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 98 u64 *address1, u64 *address2, 99 u8 *ar_b1, u8 *ar_b2) 100 { 101 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 102 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 103 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 104 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 105 106 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 107 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 108 109 if (ar_b1) 110 *ar_b1 = base1; 111 if (ar_b2) 112 *ar_b2 = base2; 113 } 114 115 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 116 { 117 if (r1) 118 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 119 if (r2) 120 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 121 } 122 123 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 124 { 125 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 126 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 127 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 128 /* The displacement is a 20bit _SIGNED_ value */ 129 if (disp2 & 0x80000) 130 disp2+=0xfff00000; 131 132 if (ar) 133 *ar = base2; 134 135 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 136 } 137 138 static inline u64 kvm_s390_get_base_disp_rs(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); 142 143 if (ar) 144 *ar = base2; 145 146 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 147 } 148 149 /* Set the condition code in the guest program status word */ 150 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 151 { 152 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 153 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 154 } 155 156 /* test availability of facility in a kvm instance */ 157 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 158 { 159 return __test_facility(nr, kvm->arch.model.fac_mask) && 160 __test_facility(nr, kvm->arch.model.fac_list); 161 } 162 163 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 164 { 165 unsigned char *ptr; 166 167 if (nr >= MAX_FACILITY_BIT) 168 return -EINVAL; 169 ptr = (unsigned char *) fac_list + (nr >> 3); 170 *ptr |= (0x80UL >> (nr & 7)); 171 return 0; 172 } 173 174 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 175 { 176 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 177 return test_bit_inv(nr, kvm->arch.cpu_feat); 178 } 179 180 /* are cpu states controlled by user space */ 181 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 182 { 183 return kvm->arch.user_cpu_state_ctrl != 0; 184 } 185 186 /* implemented in interrupt.c */ 187 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 188 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 189 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 190 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 191 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 192 void kvm_s390_clear_float_irqs(struct kvm *kvm); 193 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 194 struct kvm_s390_interrupt *s390int); 195 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 196 struct kvm_s390_irq *irq); 197 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 198 struct kvm_s390_pgm_info *pgm_info) 199 { 200 struct kvm_s390_irq irq = { 201 .type = KVM_S390_PROGRAM_INT, 202 .u.pgm = *pgm_info, 203 }; 204 205 return kvm_s390_inject_vcpu(vcpu, &irq); 206 } 207 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 208 { 209 struct kvm_s390_irq irq = { 210 .type = KVM_S390_PROGRAM_INT, 211 .u.pgm.code = code, 212 }; 213 214 return kvm_s390_inject_vcpu(vcpu, &irq); 215 } 216 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 217 u64 isc_mask, u32 schid); 218 int kvm_s390_reinject_io_int(struct kvm *kvm, 219 struct kvm_s390_interrupt_info *inti); 220 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 221 222 /* implemented in intercept.c */ 223 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 224 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 225 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 226 { 227 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 228 229 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 230 } 231 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 232 { 233 kvm_s390_rewind_psw(vcpu, -ilen); 234 } 235 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 236 { 237 /* don't inject PER events if we re-execute the instruction */ 238 vcpu->arch.sie_block->icptstatus &= ~0x02; 239 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 240 } 241 242 int handle_sthyi(struct kvm_vcpu *vcpu); 243 244 /* implemented in priv.c */ 245 int is_valid_psw(psw_t *psw); 246 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 247 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 248 int kvm_s390_handle_e3(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 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); 257 258 /* implemented in vsie.c */ 259 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 260 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 261 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 262 unsigned long end); 263 void kvm_s390_vsie_init(struct kvm *kvm); 264 void kvm_s390_vsie_destroy(struct kvm *kvm); 265 266 /* implemented in sigp.c */ 267 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 268 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 269 270 /* implemented in kvm-s390.c */ 271 void kvm_s390_set_tod_clock_ext(struct kvm *kvm, 272 const struct kvm_s390_vm_tod_clock *gtod); 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 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 399 struct mcck_volatile_info *mcck_info); 400 #endif 401