1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * definition for kvm on s390
4  *
5  * Copyright IBM Corp. 2008, 2020
6  *
7  *    Author(s): Carsten Otte <cotte@de.ibm.com>
8  *               Christian Borntraeger <borntraeger@de.ibm.com>
9  *               Christian Ehrhardt <ehrhardt@de.ibm.com>
10  */
11 
12 #ifndef ARCH_S390_KVM_S390_H
13 #define ARCH_S390_KVM_S390_H
14 
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>
21 #include <asm/sclp.h>
22 
23 /* Transactional Memory Execution related macros */
24 #define IS_TE_ENABLED(vcpu)	((vcpu->arch.sie_block->ecb & ECB_TE))
25 #define TDB_FORMAT1		1
26 #define IS_ITDB_VALID(vcpu)	((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
27 
28 extern debug_info_t *kvm_s390_dbf;
29 extern debug_info_t *kvm_s390_dbf_uv;
30 
31 #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
32 do { \
33 	debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
34 	  d_args); \
35 	debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
36 			    "%d: " d_string "\n", (d_kvm)->userspace_pid, \
37 			    d_args); \
38 } while (0)
39 
40 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
41 do { \
42 	debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
43 	  d_args); \
44 } while (0)
45 
46 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
47 do { \
48 	debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
49 	  d_args); \
50 } while (0)
51 
52 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
53 do { \
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,\
57 	  d_args); \
58 } while (0)
59 
kvm_s390_set_cpuflags(struct kvm_vcpu * vcpu,u32 flags)60 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
61 {
62 	atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
63 }
64 
kvm_s390_clear_cpuflags(struct kvm_vcpu * vcpu,u32 flags)65 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
66 {
67 	atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
68 }
69 
kvm_s390_test_cpuflags(struct kvm_vcpu * vcpu,u32 flags)70 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
71 {
72 	return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
73 }
74 
is_vcpu_stopped(struct kvm_vcpu * vcpu)75 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
76 {
77 	return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
78 }
79 
is_vcpu_idle(struct kvm_vcpu * vcpu)80 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
81 {
82 	return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
83 }
84 
kvm_is_ucontrol(struct kvm * kvm)85 static inline int kvm_is_ucontrol(struct kvm *kvm)
86 {
87 #ifdef CONFIG_KVM_S390_UCONTROL
88 	if (kvm->arch.gmap)
89 		return 0;
90 	return 1;
91 #else
92 	return 0;
93 #endif
94 }
95 
96 #define GUEST_PREFIX_SHIFT 13
kvm_s390_get_prefix(struct kvm_vcpu * vcpu)97 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
98 {
99 	return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
100 }
101 
kvm_s390_set_prefix(struct kvm_vcpu * vcpu,u32 prefix)102 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
103 {
104 	VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
105 		   prefix);
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_REFRESH_GUEST_PREFIX, vcpu);
109 }
110 
kvm_s390_get_base_disp_s(struct kvm_vcpu * vcpu,u8 * ar)111 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
112 {
113 	u32 base2 = vcpu->arch.sie_block->ipb >> 28;
114 	u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
115 
116 	if (ar)
117 		*ar = base2;
118 
119 	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
120 }
121 
kvm_s390_get_base_disp_sse(struct kvm_vcpu * vcpu,u64 * address1,u64 * address2,u8 * ar_b1,u8 * ar_b2)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)
125 {
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;
130 
131 	*address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
132 	*address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
133 
134 	if (ar_b1)
135 		*ar_b1 = base1;
136 	if (ar_b2)
137 		*ar_b2 = base2;
138 }
139 
kvm_s390_get_regs_rre(struct kvm_vcpu * vcpu,int * r1,int * r2)140 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
141 {
142 	if (r1)
143 		*r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
144 	if (r2)
145 		*r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
146 }
147 
kvm_s390_get_base_disp_rsy(struct kvm_vcpu * vcpu,u8 * ar)148 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
149 {
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 */
154 	if (disp2 & 0x80000)
155 		disp2+=0xfff00000;
156 
157 	if (ar)
158 		*ar = base2;
159 
160 	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
161 }
162 
kvm_s390_get_base_disp_rs(struct kvm_vcpu * vcpu,u8 * ar)163 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
164 {
165 	u32 base2 = vcpu->arch.sie_block->ipb >> 28;
166 	u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
167 
168 	if (ar)
169 		*ar = base2;
170 
171 	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
172 }
173 
174 /* Set the condition code in the guest program status word */
kvm_s390_set_psw_cc(struct kvm_vcpu * vcpu,unsigned long cc)175 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
176 {
177 	vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
178 	vcpu->arch.sie_block->gpsw.mask |= cc << 44;
179 }
180 
181 /* test availability of facility in a kvm instance */
test_kvm_facility(struct kvm * kvm,unsigned long nr)182 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
183 {
184 	return __test_facility(nr, kvm->arch.model.fac_mask) &&
185 		__test_facility(nr, kvm->arch.model.fac_list);
186 }
187 
set_kvm_facility(u64 * fac_list,unsigned long nr)188 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
189 {
190 	unsigned char *ptr;
191 
192 	if (nr >= MAX_FACILITY_BIT)
193 		return -EINVAL;
194 	ptr = (unsigned char *) fac_list + (nr >> 3);
195 	*ptr |= (0x80UL >> (nr & 7));
196 	return 0;
197 }
198 
test_kvm_cpu_feat(struct kvm * kvm,unsigned long nr)199 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
200 {
201 	WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
202 	return test_bit_inv(nr, kvm->arch.cpu_feat);
203 }
204 
205 /* are cpu states controlled by user space */
kvm_s390_user_cpu_state_ctrl(struct kvm * kvm)206 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
207 {
208 	return kvm->arch.user_cpu_state_ctrl != 0;
209 }
210 
kvm_s390_set_user_cpu_state_ctrl(struct kvm * kvm)211 static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
212 {
213 	if (kvm->arch.user_cpu_state_ctrl)
214 		return;
215 
216 	VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
217 	kvm->arch.user_cpu_state_ctrl = 1;
218 }
219 
220 /* get the end gfn of the last (highest gfn) memslot */
kvm_s390_get_gfn_end(struct kvm_memslots * slots)221 static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots)
222 {
223 	struct rb_node *node;
224 	struct kvm_memory_slot *ms;
225 
226 	if (WARN_ON(kvm_memslots_empty(slots)))
227 		return 0;
228 
229 	node = rb_last(&slots->gfn_tree);
230 	ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]);
231 	return ms->base_gfn + ms->npages;
232 }
233 
kvm_s390_get_gisa_desc(struct kvm * kvm)234 static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm)
235 {
236 	u32 gd = (u32)(u64)kvm->arch.gisa_int.origin;
237 
238 	if (gd && sclp.has_gisaf)
239 		gd |= GISA_FORMAT1;
240 	return gd;
241 }
242 
243 /* implemented in pv.c */
244 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
245 int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
246 int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
247 int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
248 int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
249 			      u16 *rrc);
250 int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
251 		       unsigned long tweak, u16 *rc, u16 *rrc);
252 int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
253 
kvm_s390_pv_get_handle(struct kvm * kvm)254 static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
255 {
256 	return kvm->arch.pv.handle;
257 }
258 
kvm_s390_pv_cpu_get_handle(struct kvm_vcpu * vcpu)259 static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
260 {
261 	return vcpu->arch.pv.handle;
262 }
263 
kvm_s390_pv_is_protected(struct kvm * kvm)264 static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
265 {
266 	lockdep_assert_held(&kvm->lock);
267 	return !!kvm_s390_pv_get_handle(kvm);
268 }
269 
kvm_s390_pv_cpu_is_protected(struct kvm_vcpu * vcpu)270 static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
271 {
272 	lockdep_assert_held(&vcpu->mutex);
273 	return !!kvm_s390_pv_cpu_get_handle(vcpu);
274 }
275 
276 /* implemented in interrupt.c */
277 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
278 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
279 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
280 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
281 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
282 void kvm_s390_clear_float_irqs(struct kvm *kvm);
283 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
284 				    struct kvm_s390_interrupt *s390int);
285 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
286 				      struct kvm_s390_irq *irq);
kvm_s390_inject_prog_irq(struct kvm_vcpu * vcpu,struct kvm_s390_pgm_info * pgm_info)287 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
288 					   struct kvm_s390_pgm_info *pgm_info)
289 {
290 	struct kvm_s390_irq irq = {
291 		.type = KVM_S390_PROGRAM_INT,
292 		.u.pgm = *pgm_info,
293 	};
294 
295 	return kvm_s390_inject_vcpu(vcpu, &irq);
296 }
kvm_s390_inject_program_int(struct kvm_vcpu * vcpu,u16 code)297 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
298 {
299 	struct kvm_s390_irq irq = {
300 		.type = KVM_S390_PROGRAM_INT,
301 		.u.pgm.code = code,
302 	};
303 
304 	return kvm_s390_inject_vcpu(vcpu, &irq);
305 }
306 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
307 						    u64 isc_mask, u32 schid);
308 int kvm_s390_reinject_io_int(struct kvm *kvm,
309 			     struct kvm_s390_interrupt_info *inti);
310 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
311 
312 /* implemented in intercept.c */
313 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
314 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
kvm_s390_rewind_psw(struct kvm_vcpu * vcpu,int ilen)315 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
316 {
317 	struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
318 
319 	sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
320 }
kvm_s390_forward_psw(struct kvm_vcpu * vcpu,int ilen)321 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
322 {
323 	kvm_s390_rewind_psw(vcpu, -ilen);
324 }
kvm_s390_retry_instr(struct kvm_vcpu * vcpu)325 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
326 {
327 	/* don't inject PER events if we re-execute the instruction */
328 	vcpu->arch.sie_block->icptstatus &= ~0x02;
329 	kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
330 }
331 
332 int handle_sthyi(struct kvm_vcpu *vcpu);
333 
334 /* implemented in priv.c */
335 int is_valid_psw(psw_t *psw);
336 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
337 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
338 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
339 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
340 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
341 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
342 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
343 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
344 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
345 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
346 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
347 
348 /* implemented in vsie.c */
349 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
350 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
351 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
352 				 unsigned long end);
353 void kvm_s390_vsie_init(struct kvm *kvm);
354 void kvm_s390_vsie_destroy(struct kvm *kvm);
355 
356 /* implemented in sigp.c */
357 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
358 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
359 
360 /* implemented in kvm-s390.c */
361 void kvm_s390_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
362 int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
363 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
364 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
365 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
366 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
367 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
368 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
369 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
370 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
371 void exit_sie(struct kvm_vcpu *vcpu);
372 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
373 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
374 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
375 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
376 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
377 
378 /* implemented in diag.c */
379 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
380 
kvm_s390_vcpu_block_all(struct kvm * kvm)381 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
382 {
383 	unsigned long i;
384 	struct kvm_vcpu *vcpu;
385 
386 	WARN_ON(!mutex_is_locked(&kvm->lock));
387 	kvm_for_each_vcpu(i, vcpu, kvm)
388 		kvm_s390_vcpu_block(vcpu);
389 }
390 
kvm_s390_vcpu_unblock_all(struct kvm * kvm)391 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
392 {
393 	unsigned long i;
394 	struct kvm_vcpu *vcpu;
395 
396 	kvm_for_each_vcpu(i, vcpu, kvm)
397 		kvm_s390_vcpu_unblock(vcpu);
398 }
399 
kvm_s390_get_tod_clock_fast(struct kvm * kvm)400 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
401 {
402 	u64 rc;
403 
404 	preempt_disable();
405 	rc = get_tod_clock_fast() + kvm->arch.epoch;
406 	preempt_enable();
407 	return rc;
408 }
409 
410 /**
411  * kvm_s390_inject_prog_cond - conditionally inject a program check
412  * @vcpu: virtual cpu
413  * @rc: original return/error code
414  *
415  * This function is supposed to be used after regular guest access functions
416  * failed, to conditionally inject a program check to a vcpu. The typical
417  * pattern would look like
418  *
419  * rc = write_guest(vcpu, addr, data, len);
420  * if (rc)
421  *	return kvm_s390_inject_prog_cond(vcpu, rc);
422  *
423  * A negative return code from guest access functions implies an internal error
424  * like e.g. out of memory. In these cases no program check should be injected
425  * to the guest.
426  * A positive value implies that an exception happened while accessing a guest's
427  * memory. In this case all data belonging to the corresponding program check
428  * has been stored in vcpu->arch.pgm and can be injected with
429  * kvm_s390_inject_prog_irq().
430  *
431  * Returns: - the original @rc value if @rc was negative (internal error)
432  *	    - zero if @rc was already zero
433  *	    - zero or error code from injecting if @rc was positive
434  *	      (program check injected to @vcpu)
435  */
kvm_s390_inject_prog_cond(struct kvm_vcpu * vcpu,int rc)436 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
437 {
438 	if (rc <= 0)
439 		return rc;
440 	return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
441 }
442 
443 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
444 			struct kvm_s390_irq *s390irq);
445 
446 /* implemented in interrupt.c */
447 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
448 int psw_extint_disabled(struct kvm_vcpu *vcpu);
449 void kvm_s390_destroy_adapters(struct kvm *kvm);
450 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
451 extern struct kvm_device_ops kvm_flic_ops;
452 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
453 int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu);
454 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
455 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
456 			   void __user *buf, int len);
457 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
458 			   __u8 __user *buf, int len);
459 void kvm_s390_gisa_init(struct kvm *kvm);
460 void kvm_s390_gisa_clear(struct kvm *kvm);
461 void kvm_s390_gisa_destroy(struct kvm *kvm);
462 void kvm_s390_gisa_disable(struct kvm *kvm);
463 void kvm_s390_gisa_enable(struct kvm *kvm);
464 int kvm_s390_gib_init(u8 nisc);
465 void kvm_s390_gib_destroy(void);
466 
467 /* implemented in guestdbg.c */
468 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
469 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
470 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
471 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
472 			    struct kvm_guest_debug *dbg);
473 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
474 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
475 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
476 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
477 
478 /* support for Basic/Extended SCA handling */
kvm_s390_get_ipte_control(struct kvm * kvm)479 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
480 {
481 	struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
482 
483 	return &sca->ipte_control;
484 }
kvm_s390_use_sca_entries(void)485 static inline int kvm_s390_use_sca_entries(void)
486 {
487 	/*
488 	 * Without SIGP interpretation, only SRS interpretation (if available)
489 	 * might use the entries. By not setting the entries and keeping them
490 	 * invalid, hardware will not access them but intercept.
491 	 */
492 	return sclp.has_sigpif;
493 }
494 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
495 				     struct mcck_volatile_info *mcck_info);
496 
497 /**
498  * kvm_s390_vcpu_crypto_reset_all
499  *
500  * Reset the crypto attributes for each vcpu. This can be done while the vcpus
501  * are running as each vcpu will be removed from SIE before resetting the crypt
502  * attributes and restored to SIE afterward.
503  *
504  * Note: The kvm->lock must be held while calling this function
505  *
506  * @kvm: the KVM guest
507  */
508 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
509 
510 /**
511  * diag9c_forwarding_hz
512  *
513  * Set the maximum number of diag9c forwarding per second
514  */
515 extern unsigned int diag9c_forwarding_hz;
516 
517 #endif
518