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 atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_WAIT; 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 /* are cpu states controlled by user space */ 179 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 180 { 181 return kvm->arch.user_cpu_state_ctrl != 0; 182 } 183 184 /* implemented in interrupt.c */ 185 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 186 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 187 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 188 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 189 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 190 void kvm_s390_clear_float_irqs(struct kvm *kvm); 191 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 192 struct kvm_s390_interrupt *s390int); 193 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 194 struct kvm_s390_irq *irq); 195 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 196 struct kvm_s390_pgm_info *pgm_info) 197 { 198 struct kvm_s390_irq irq = { 199 .type = KVM_S390_PROGRAM_INT, 200 .u.pgm = *pgm_info, 201 }; 202 203 return kvm_s390_inject_vcpu(vcpu, &irq); 204 } 205 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 206 { 207 struct kvm_s390_irq irq = { 208 .type = KVM_S390_PROGRAM_INT, 209 .u.pgm.code = code, 210 }; 211 212 return kvm_s390_inject_vcpu(vcpu, &irq); 213 } 214 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 215 u64 isc_mask, u32 schid); 216 int kvm_s390_reinject_io_int(struct kvm *kvm, 217 struct kvm_s390_interrupt_info *inti); 218 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 219 220 /* implemented in intercept.c */ 221 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 222 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 223 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 224 { 225 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 226 227 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 228 } 229 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 230 { 231 kvm_s390_rewind_psw(vcpu, -ilen); 232 } 233 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 234 { 235 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 236 } 237 238 /* implemented in priv.c */ 239 int is_valid_psw(psw_t *psw); 240 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 241 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 242 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 243 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 244 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 245 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 246 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 247 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 248 249 /* implemented in sigp.c */ 250 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 251 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 252 253 /* implemented in kvm-s390.c */ 254 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod); 255 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 256 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 257 int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, 258 unsigned long addr); 259 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 260 int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr); 261 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 262 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 263 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 264 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 265 void exit_sie(struct kvm_vcpu *vcpu); 266 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 267 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 268 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 269 unsigned long kvm_s390_fac_list_mask_size(void); 270 extern unsigned long kvm_s390_fac_list_mask[]; 271 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 272 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 273 274 /* implemented in diag.c */ 275 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 276 277 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 278 { 279 int i; 280 struct kvm_vcpu *vcpu; 281 282 WARN_ON(!mutex_is_locked(&kvm->lock)); 283 kvm_for_each_vcpu(i, vcpu, kvm) 284 kvm_s390_vcpu_block(vcpu); 285 } 286 287 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 288 { 289 int i; 290 struct kvm_vcpu *vcpu; 291 292 kvm_for_each_vcpu(i, vcpu, kvm) 293 kvm_s390_vcpu_unblock(vcpu); 294 } 295 296 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 297 { 298 u64 rc; 299 300 preempt_disable(); 301 rc = get_tod_clock_fast() + kvm->arch.epoch; 302 preempt_enable(); 303 return rc; 304 } 305 306 /** 307 * kvm_s390_inject_prog_cond - conditionally inject a program check 308 * @vcpu: virtual cpu 309 * @rc: original return/error code 310 * 311 * This function is supposed to be used after regular guest access functions 312 * failed, to conditionally inject a program check to a vcpu. The typical 313 * pattern would look like 314 * 315 * rc = write_guest(vcpu, addr, data, len); 316 * if (rc) 317 * return kvm_s390_inject_prog_cond(vcpu, rc); 318 * 319 * A negative return code from guest access functions implies an internal error 320 * like e.g. out of memory. In these cases no program check should be injected 321 * to the guest. 322 * A positive value implies that an exception happened while accessing a guest's 323 * memory. In this case all data belonging to the corresponding program check 324 * has been stored in vcpu->arch.pgm and can be injected with 325 * kvm_s390_inject_prog_irq(). 326 * 327 * Returns: - the original @rc value if @rc was negative (internal error) 328 * - zero if @rc was already zero 329 * - zero or error code from injecting if @rc was positive 330 * (program check injected to @vcpu) 331 */ 332 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 333 { 334 if (rc <= 0) 335 return rc; 336 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 337 } 338 339 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 340 struct kvm_s390_irq *s390irq); 341 342 /* implemented in interrupt.c */ 343 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 344 int psw_extint_disabled(struct kvm_vcpu *vcpu); 345 void kvm_s390_destroy_adapters(struct kvm *kvm); 346 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 347 extern struct kvm_device_ops kvm_flic_ops; 348 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 349 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 350 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 351 void __user *buf, int len); 352 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 353 __u8 __user *buf, int len); 354 355 /* implemented in guestdbg.c */ 356 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 357 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 358 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 359 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 360 struct kvm_guest_debug *dbg); 361 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 362 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 363 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 364 365 /* support for Basic/Extended SCA handling */ 366 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 367 { 368 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 369 370 return &sca->ipte_control; 371 } 372 #endif 373