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