1 /* SPDX-License-Identifier: GPL-2.0 */
3 * definition for kvm on s390
5 * Copyright IBM Corp. 2008, 2020
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Christian Ehrhardt <ehrhardt@de.ibm.com>
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 /* Transactional Memory Execution related macros */
24 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
26 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
28 extern debug_info_t *kvm_s390_dbf;
29 extern debug_info_t *kvm_s390_dbf_uv;
31 #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
33 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
35 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
36 "%d: " d_string "\n", (d_kvm)->userspace_pid, \
40 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
42 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
46 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
48 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
52 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
54 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
55 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
56 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
60 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
62 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
65 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
67 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
70 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
72 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
75 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
77 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
80 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
82 return test_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.idle_mask);
85 static inline int kvm_is_ucontrol(struct kvm *kvm)
87 #ifdef CONFIG_KVM_S390_UCONTROL
96 #define GUEST_PREFIX_SHIFT 13
97 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
99 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
102 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
104 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
106 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
107 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
108 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
111 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
113 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
114 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
119 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
122 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
123 u64 *address1, u64 *address2,
124 u8 *ar_b1, u8 *ar_b2)
126 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
127 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
128 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
129 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
131 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
132 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
140 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
143 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
145 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
148 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
150 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
151 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
152 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
153 /* The displacement is a 20bit _SIGNED_ value */
160 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
163 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
165 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
166 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
171 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
174 /* Set the condition code in the guest program status word */
175 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
177 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
178 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
181 /* test availability of facility in a kvm instance */
182 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
184 return __test_facility(nr, kvm->arch.model.fac_mask) &&
185 __test_facility(nr, kvm->arch.model.fac_list);
188 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
192 if (nr >= MAX_FACILITY_BIT)
194 ptr = (unsigned char *) fac_list + (nr >> 3);
195 *ptr |= (0x80UL >> (nr & 7));
199 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
201 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
202 return test_bit_inv(nr, kvm->arch.cpu_feat);
205 /* are cpu states controlled by user space */
206 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
208 return kvm->arch.user_cpu_state_ctrl != 0;
211 /* implemented in pv.c */
212 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
213 int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
214 int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
215 int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
216 int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
218 int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
219 unsigned long tweak, u16 *rc, u16 *rrc);
220 int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
222 static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
224 return kvm->arch.pv.handle;
227 static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
229 return vcpu->arch.pv.handle;
232 static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
234 lockdep_assert_held(&kvm->lock);
235 return !!kvm_s390_pv_get_handle(kvm);
238 static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
240 lockdep_assert_held(&vcpu->mutex);
241 return !!kvm_s390_pv_cpu_get_handle(vcpu);
244 /* implemented in interrupt.c */
245 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
246 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
247 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
248 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
249 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
250 void kvm_s390_clear_float_irqs(struct kvm *kvm);
251 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
252 struct kvm_s390_interrupt *s390int);
253 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
254 struct kvm_s390_irq *irq);
255 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
256 struct kvm_s390_pgm_info *pgm_info)
258 struct kvm_s390_irq irq = {
259 .type = KVM_S390_PROGRAM_INT,
263 return kvm_s390_inject_vcpu(vcpu, &irq);
265 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
267 struct kvm_s390_irq irq = {
268 .type = KVM_S390_PROGRAM_INT,
272 return kvm_s390_inject_vcpu(vcpu, &irq);
274 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
275 u64 isc_mask, u32 schid);
276 int kvm_s390_reinject_io_int(struct kvm *kvm,
277 struct kvm_s390_interrupt_info *inti);
278 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
280 /* implemented in intercept.c */
281 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
282 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
283 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
285 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
287 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
289 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
291 kvm_s390_rewind_psw(vcpu, -ilen);
293 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
295 /* don't inject PER events if we re-execute the instruction */
296 vcpu->arch.sie_block->icptstatus &= ~0x02;
297 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
300 int handle_sthyi(struct kvm_vcpu *vcpu);
302 /* implemented in priv.c */
303 int is_valid_psw(psw_t *psw);
304 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
305 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
306 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
307 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
308 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
309 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
310 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
311 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
312 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
313 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
314 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
316 /* implemented in vsie.c */
317 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
318 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
319 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
321 void kvm_s390_vsie_init(struct kvm *kvm);
322 void kvm_s390_vsie_destroy(struct kvm *kvm);
324 /* implemented in sigp.c */
325 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
326 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
328 /* implemented in kvm-s390.c */
329 void kvm_s390_set_tod_clock(struct kvm *kvm,
330 const struct kvm_s390_vm_tod_clock *gtod);
331 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
332 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
333 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
334 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
335 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
336 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
337 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
338 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
339 void exit_sie(struct kvm_vcpu *vcpu);
340 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
341 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
342 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
343 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
344 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
346 /* implemented in diag.c */
347 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
349 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
352 struct kvm_vcpu *vcpu;
354 WARN_ON(!mutex_is_locked(&kvm->lock));
355 kvm_for_each_vcpu(i, vcpu, kvm)
356 kvm_s390_vcpu_block(vcpu);
359 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
362 struct kvm_vcpu *vcpu;
364 kvm_for_each_vcpu(i, vcpu, kvm)
365 kvm_s390_vcpu_unblock(vcpu);
368 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
373 rc = get_tod_clock_fast() + kvm->arch.epoch;
379 * kvm_s390_inject_prog_cond - conditionally inject a program check
381 * @rc: original return/error code
383 * This function is supposed to be used after regular guest access functions
384 * failed, to conditionally inject a program check to a vcpu. The typical
385 * pattern would look like
387 * rc = write_guest(vcpu, addr, data, len);
389 * return kvm_s390_inject_prog_cond(vcpu, rc);
391 * A negative return code from guest access functions implies an internal error
392 * like e.g. out of memory. In these cases no program check should be injected
394 * A positive value implies that an exception happened while accessing a guest's
395 * memory. In this case all data belonging to the corresponding program check
396 * has been stored in vcpu->arch.pgm and can be injected with
397 * kvm_s390_inject_prog_irq().
399 * Returns: - the original @rc value if @rc was negative (internal error)
400 * - zero if @rc was already zero
401 * - zero or error code from injecting if @rc was positive
402 * (program check injected to @vcpu)
404 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
408 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
411 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
412 struct kvm_s390_irq *s390irq);
414 /* implemented in interrupt.c */
415 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
416 int psw_extint_disabled(struct kvm_vcpu *vcpu);
417 void kvm_s390_destroy_adapters(struct kvm *kvm);
418 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
419 extern struct kvm_device_ops kvm_flic_ops;
420 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
421 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
422 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
423 void __user *buf, int len);
424 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
425 __u8 __user *buf, int len);
426 void kvm_s390_gisa_init(struct kvm *kvm);
427 void kvm_s390_gisa_clear(struct kvm *kvm);
428 void kvm_s390_gisa_destroy(struct kvm *kvm);
429 int kvm_s390_gib_init(u8 nisc);
430 void kvm_s390_gib_destroy(void);
432 /* implemented in guestdbg.c */
433 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
434 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
435 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
436 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
437 struct kvm_guest_debug *dbg);
438 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
439 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
440 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
441 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
443 /* support for Basic/Extended SCA handling */
444 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
446 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
448 return &sca->ipte_control;
450 static inline int kvm_s390_use_sca_entries(void)
453 * Without SIGP interpretation, only SRS interpretation (if available)
454 * might use the entries. By not setting the entries and keeping them
455 * invalid, hardware will not access them but intercept.
457 return sclp.has_sigpif;
459 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
460 struct mcck_volatile_info *mcck_info);
463 * kvm_s390_vcpu_crypto_reset_all
465 * Reset the crypto attributes for each vcpu. This can be done while the vcpus
466 * are running as each vcpu will be removed from SIE before resetting the crypt
467 * attributes and restored to SIE afterward.
469 * Note: The kvm->lock must be held while calling this function
471 * @kvm: the KVM guest
473 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
476 * diag9c_forwarding_hz
478 * Set the maximum number of diag9c forwarding per second
480 extern unsigned int diag9c_forwarding_hz;