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 24 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); 25 26 /* Transactional Memory Execution related macros */ 27 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10)) 28 #define TDB_FORMAT1 1 29 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 30 31 extern debug_info_t *kvm_s390_dbf; 32 #define KVM_EVENT(d_loglevel, d_string, d_args...)\ 33 do { \ 34 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 35 d_args); \ 36 } while (0) 37 38 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 39 do { \ 40 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 41 d_args); \ 42 } while (0) 43 44 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 45 do { \ 46 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 47 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 48 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 49 d_args); \ 50 } while (0) 51 52 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 53 { 54 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 55 } 56 57 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 58 { 59 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); 60 } 61 62 static inline int kvm_is_ucontrol(struct kvm *kvm) 63 { 64 #ifdef CONFIG_KVM_S390_UCONTROL 65 if (kvm->arch.gmap) 66 return 0; 67 return 1; 68 #else 69 return 0; 70 #endif 71 } 72 73 #define GUEST_PREFIX_SHIFT 13 74 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 75 { 76 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 77 } 78 79 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 80 { 81 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 82 prefix); 83 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 84 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 85 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 86 } 87 88 typedef u8 __bitwise ar_t; 89 90 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *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 ar_t *ar_b1, ar_t *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, ar_t *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, ar_t *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 /* implemented in priv.c */ 247 int is_valid_psw(psw_t *psw); 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_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, 277 unsigned long addr); 278 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 279 int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr); 280 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 281 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 282 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 283 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 284 void exit_sie(struct kvm_vcpu *vcpu); 285 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 286 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 287 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 288 unsigned long kvm_s390_fac_list_mask_size(void); 289 extern unsigned long kvm_s390_fac_list_mask[]; 290 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 291 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 292 293 /* implemented in diag.c */ 294 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 295 296 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 297 { 298 int i; 299 struct kvm_vcpu *vcpu; 300 301 WARN_ON(!mutex_is_locked(&kvm->lock)); 302 kvm_for_each_vcpu(i, vcpu, kvm) 303 kvm_s390_vcpu_block(vcpu); 304 } 305 306 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 307 { 308 int i; 309 struct kvm_vcpu *vcpu; 310 311 kvm_for_each_vcpu(i, vcpu, kvm) 312 kvm_s390_vcpu_unblock(vcpu); 313 } 314 315 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 316 { 317 u64 rc; 318 319 preempt_disable(); 320 rc = get_tod_clock_fast() + kvm->arch.epoch; 321 preempt_enable(); 322 return rc; 323 } 324 325 /** 326 * kvm_s390_inject_prog_cond - conditionally inject a program check 327 * @vcpu: virtual cpu 328 * @rc: original return/error code 329 * 330 * This function is supposed to be used after regular guest access functions 331 * failed, to conditionally inject a program check to a vcpu. The typical 332 * pattern would look like 333 * 334 * rc = write_guest(vcpu, addr, data, len); 335 * if (rc) 336 * return kvm_s390_inject_prog_cond(vcpu, rc); 337 * 338 * A negative return code from guest access functions implies an internal error 339 * like e.g. out of memory. In these cases no program check should be injected 340 * to the guest. 341 * A positive value implies that an exception happened while accessing a guest's 342 * memory. In this case all data belonging to the corresponding program check 343 * has been stored in vcpu->arch.pgm and can be injected with 344 * kvm_s390_inject_prog_irq(). 345 * 346 * Returns: - the original @rc value if @rc was negative (internal error) 347 * - zero if @rc was already zero 348 * - zero or error code from injecting if @rc was positive 349 * (program check injected to @vcpu) 350 */ 351 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 352 { 353 if (rc <= 0) 354 return rc; 355 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 356 } 357 358 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 359 struct kvm_s390_irq *s390irq); 360 361 /* implemented in interrupt.c */ 362 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 363 int psw_extint_disabled(struct kvm_vcpu *vcpu); 364 void kvm_s390_destroy_adapters(struct kvm *kvm); 365 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 366 extern struct kvm_device_ops kvm_flic_ops; 367 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 368 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 369 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 370 void __user *buf, int len); 371 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 372 __u8 __user *buf, int len); 373 374 /* implemented in guestdbg.c */ 375 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 376 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 377 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 378 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 379 struct kvm_guest_debug *dbg); 380 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 381 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 382 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 383 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 384 385 /* support for Basic/Extended SCA handling */ 386 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 387 { 388 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 389 390 return &sca->ipte_control; 391 } 392 #endif 393