1 /* SPDX-License-Identifier: GPL-2.0 */
3 * definition for kvm on s390
5 * Copyright IBM Corp. 2008, 2020
12 #ifndef ARCH_S390_KVM_S390_H
13 #define ARCH_S390_KVM_S390_H
15 #include <linux/hrtimer.h>
16 #include <linux/kvm.h>
17 #include <linux/kvm_host.h>
18 #include <linux/lockdep.h>
19 #include <asm/facility.h>
20 #include <asm/processor.h>
23 static inline void kvm_s390_fpu_store(struct kvm_run *run)
25 fpu_stfpc(&run->s.regs.fpc);
27 save_vx_regs((__vector128 *)&run->s.regs.vrs);
29 save_fp_regs((freg_t *)&run->s.regs.fprs);
32 static inline void kvm_s390_fpu_load(struct kvm_run *run)
34 fpu_lfpc_safe(&run->s.regs.fpc);
36 load_vx_regs((__vector128 *)&run->s.regs.vrs);
38 load_fp_regs((freg_t *)&run->s.regs.fprs);
41 /* Transactional Memory Execution related macros */
42 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
44 #define IS_ITDB_VALID(vcpu) \
45 ((*(char *)phys_to_virt((vcpu)->arch.sie_block->itdba) == TDB_FORMAT1))
47 extern debug_info_t *kvm_s390_dbf;
48 extern debug_info_t *kvm_s390_dbf_uv;
50 #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
52 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
54 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
55 "%d: " d_string "\n", (d_kvm)->userspace_pid, \
59 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
61 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
65 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
67 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
71 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
73 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
74 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
75 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
79 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
81 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
84 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
86 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
89 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
91 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
94 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
96 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
99 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
101 return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
104 static inline int kvm_is_ucontrol(struct kvm *kvm)
106 #ifdef CONFIG_KVM_S390_UCONTROL
115 #define GUEST_PREFIX_SHIFT 13
116 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
118 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
121 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
123 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
125 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
126 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
127 kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu);
130 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
132 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
133 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
138 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
141 static inline u64 kvm_s390_get_base_disp_siy(struct kvm_vcpu *vcpu, u8 *ar)
143 u32 base1 = vcpu->arch.sie_block->ipb >> 28;
146 /* The displacement is a 20bit _SIGNED_ value */
147 disp1 = sign_extend64(((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
148 ((vcpu->arch.sie_block->ipb & 0xff00) << 4), 19);
153 return (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
156 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
157 u64 *address1, u64 *address2,
158 u8 *ar_b1, u8 *ar_b2)
160 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
161 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
162 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
163 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
165 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
166 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
174 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
177 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
179 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
182 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
184 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
185 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
186 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
187 /* The displacement is a 20bit _SIGNED_ value */
194 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
197 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
199 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
200 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
205 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
208 /* Set the condition code in the guest program status word */
209 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
211 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
212 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
215 /* test availability of facility in a kvm instance */
216 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
218 return __test_facility(nr, kvm->arch.model.fac_mask) &&
219 __test_facility(nr, kvm->arch.model.fac_list);
222 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
226 if (nr >= MAX_FACILITY_BIT)
228 ptr = (unsigned char *) fac_list + (nr >> 3);
229 *ptr |= (0x80UL >> (nr & 7));
233 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
235 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
236 return test_bit_inv(nr, kvm->arch.cpu_feat);
239 /* are cpu states controlled by user space */
240 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
242 return kvm->arch.user_cpu_state_ctrl != 0;
245 static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
247 if (kvm->arch.user_cpu_state_ctrl)
250 VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
251 kvm->arch.user_cpu_state_ctrl = 1;
254 /* get the end gfn of the last (highest gfn) memslot */
255 static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots)
257 struct rb_node *node;
258 struct kvm_memory_slot *ms;
260 if (WARN_ON(kvm_memslots_empty(slots)))
263 node = rb_last(&slots->gfn_tree);
264 ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]);
265 return ms->base_gfn + ms->npages;
268 static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm)
272 if (!kvm->arch.gisa_int.origin)
275 gd = virt_to_phys(kvm->arch.gisa_int.origin);
277 if (gd && sclp.has_gisaf)
282 /* implemented in pv.c */
283 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
284 int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
285 int kvm_s390_pv_set_aside(struct kvm *kvm, u16 *rc, u16 *rrc);
286 int kvm_s390_pv_deinit_aside_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
287 int kvm_s390_pv_deinit_cleanup_all(struct kvm *kvm, u16 *rc, u16 *rrc);
288 int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
289 int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
290 int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
292 int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
293 unsigned long tweak, u16 *rc, u16 *rrc);
294 int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
295 int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc);
296 int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user,
297 u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc);
298 int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user,
301 static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
303 return kvm->arch.pv.handle;
306 static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
308 return vcpu->arch.pv.handle;
311 /* implemented in interrupt.c */
312 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
313 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
314 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
315 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
316 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
317 void kvm_s390_clear_float_irqs(struct kvm *kvm);
318 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
319 struct kvm_s390_interrupt *s390int);
320 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
321 struct kvm_s390_irq *irq);
322 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
323 struct kvm_s390_pgm_info *pgm_info)
325 struct kvm_s390_irq irq = {
326 .type = KVM_S390_PROGRAM_INT,
330 return kvm_s390_inject_vcpu(vcpu, &irq);
332 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
334 struct kvm_s390_irq irq = {
335 .type = KVM_S390_PROGRAM_INT,
339 return kvm_s390_inject_vcpu(vcpu, &irq);
341 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
342 u64 isc_mask, u32 schid);
343 int kvm_s390_reinject_io_int(struct kvm *kvm,
344 struct kvm_s390_interrupt_info *inti);
345 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
347 /* implemented in intercept.c */
348 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
349 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
350 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
352 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
354 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
356 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
358 kvm_s390_rewind_psw(vcpu, -ilen);
360 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
362 /* don't inject PER events if we re-execute the instruction */
363 vcpu->arch.sie_block->icptstatus &= ~0x02;
364 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
367 int handle_sthyi(struct kvm_vcpu *vcpu);
369 /* implemented in priv.c */
370 int is_valid_psw(psw_t *psw);
371 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
372 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
373 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
374 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
375 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
376 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
377 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
378 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
379 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
380 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
381 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
383 /* implemented in vsie.c */
384 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
385 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
386 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
388 void kvm_s390_vsie_init(struct kvm *kvm);
389 void kvm_s390_vsie_destroy(struct kvm *kvm);
391 /* implemented in sigp.c */
392 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
393 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
395 /* implemented in kvm-s390.c */
396 int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
397 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
398 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
399 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
400 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
401 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
402 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
403 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
404 void exit_sie(struct kvm_vcpu *vcpu);
405 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
406 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
407 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
408 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
409 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
410 int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc);
412 /* implemented in diag.c */
413 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
415 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
418 struct kvm_vcpu *vcpu;
420 WARN_ON(!mutex_is_locked(&kvm->lock));
421 kvm_for_each_vcpu(i, vcpu, kvm)
422 kvm_s390_vcpu_block(vcpu);
425 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
428 struct kvm_vcpu *vcpu;
430 kvm_for_each_vcpu(i, vcpu, kvm)
431 kvm_s390_vcpu_unblock(vcpu);
434 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
439 rc = get_tod_clock_fast() + kvm->arch.epoch;
445 * kvm_s390_inject_prog_cond - conditionally inject a program check
447 * @rc: original return/error code
449 * This function is supposed to be used after regular guest access functions
450 * failed, to conditionally inject a program check to a vcpu. The typical
451 * pattern would look like
453 * rc = write_guest(vcpu, addr, data, len);
455 * return kvm_s390_inject_prog_cond(vcpu, rc);
457 * A negative return code from guest access functions implies an internal error
458 * like e.g. out of memory. In these cases no program check should be injected
460 * A positive value implies that an exception happened while accessing a guest's
461 * memory. In this case all data belonging to the corresponding program check
462 * has been stored in vcpu->arch.pgm and can be injected with
463 * kvm_s390_inject_prog_irq().
465 * Returns: - the original @rc value if @rc was negative (internal error)
466 * - zero if @rc was already zero
467 * - zero or error code from injecting if @rc was positive
468 * (program check injected to @vcpu)
470 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
474 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
477 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
478 struct kvm_s390_irq *s390irq);
480 /* implemented in interrupt.c */
481 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
482 int psw_extint_disabled(struct kvm_vcpu *vcpu);
483 void kvm_s390_destroy_adapters(struct kvm *kvm);
484 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
485 extern struct kvm_device_ops kvm_flic_ops;
486 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
487 int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu);
488 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
489 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
490 void __user *buf, int len);
491 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
492 __u8 __user *buf, int len);
493 void kvm_s390_gisa_init(struct kvm *kvm);
494 void kvm_s390_gisa_clear(struct kvm *kvm);
495 void kvm_s390_gisa_destroy(struct kvm *kvm);
496 void kvm_s390_gisa_disable(struct kvm *kvm);
497 void kvm_s390_gisa_enable(struct kvm *kvm);
498 int __init kvm_s390_gib_init(u8 nisc);
499 void kvm_s390_gib_destroy(void);
501 /* implemented in guestdbg.c */
502 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
503 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
504 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
505 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
506 struct kvm_guest_debug *dbg);
507 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
508 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
509 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
510 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
512 /* support for Basic/Extended SCA handling */
513 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
515 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
517 return &sca->ipte_control;
519 static inline int kvm_s390_use_sca_entries(void)
522 * Without SIGP interpretation, only SRS interpretation (if available)
523 * might use the entries. By not setting the entries and keeping them
524 * invalid, hardware will not access them but intercept.
526 return sclp.has_sigpif;
528 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
529 struct mcck_volatile_info *mcck_info);
531 static inline bool kvm_s390_cur_gmap_fault_is_write(void)
533 if (current->thread.gmap_int_code == PGM_PROTECTION)
535 return test_facility(75) && (current->thread.gmap_teid.fsi == TEID_FSI_STORE);
539 * kvm_s390_vcpu_crypto_reset_all
541 * Reset the crypto attributes for each vcpu. This can be done while the vcpus
542 * are running as each vcpu will be removed from SIE before resetting the crypt
543 * attributes and restored to SIE afterward.
545 * Note: The kvm->lock must be held while calling this function
547 * @kvm: the KVM guest
549 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
552 * kvm_s390_vcpu_pci_enable_interp
554 * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store
555 * interpretation as well as adapter interruption forwarding.
557 * @kvm: the KVM guest
559 void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm);
562 * diag9c_forwarding_hz
564 * Set the maximum number of diag9c forwarding per second
566 extern unsigned int diag9c_forwarding_hz;