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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * definition for kvm on s390
4 *
5 * Copyright IBM Corp. 2008, 2009
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 <asm/facility.h>
19#include <asm/processor.h>
20#include <asm/sclp.h>
21
22/* Transactional Memory Execution related macros */
23#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
24#define TDB_FORMAT1 1
25#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
26
27extern debug_info_t *kvm_s390_dbf;
28#define KVM_EVENT(d_loglevel, d_string, d_args...)\
29do { \
30 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
31 d_args); \
32} while (0)
33
34#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
35do { \
36 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
37 d_args); \
38} while (0)
39
40#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
41do { \
42 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
43 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
44 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
45 d_args); \
46} while (0)
47
48static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
49{
50 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
51}
52
53static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
54{
55 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
56}
57
58static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
59{
60 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
61}
62
63static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
64{
65 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
66}
67
68static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
69{
70 return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
71}
72
73static inline int kvm_is_ucontrol(struct kvm *kvm)
74{
75#ifdef CONFIG_KVM_S390_UCONTROL
76 if (kvm->arch.gmap)
77 return 0;
78 return 1;
79#else
80 return 0;
81#endif
82}
83
84#define GUEST_PREFIX_SHIFT 13
85static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
86{
87 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
88}
89
90static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
91{
92 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
93 prefix);
94 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
95 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
96 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
97}
98
99static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
100{
101 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
102 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
103
104 if (ar)
105 *ar = base2;
106
107 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
108}
109
110static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
111 u64 *address1, u64 *address2,
112 u8 *ar_b1, u8 *ar_b2)
113{
114 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
115 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
116 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
117 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
118
119 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
120 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
121
122 if (ar_b1)
123 *ar_b1 = base1;
124 if (ar_b2)
125 *ar_b2 = base2;
126}
127
128static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
129{
130 if (r1)
131 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
132 if (r2)
133 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
134}
135
136static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
137{
138 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
139 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
140 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
141 /* The displacement is a 20bit _SIGNED_ value */
142 if (disp2 & 0x80000)
143 disp2+=0xfff00000;
144
145 if (ar)
146 *ar = base2;
147
148 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
149}
150
151static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
152{
153 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
154 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
155
156 if (ar)
157 *ar = base2;
158
159 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
160}
161
162/* Set the condition code in the guest program status word */
163static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
164{
165 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
166 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
167}
168
169/* test availability of facility in a kvm instance */
170static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
171{
172 return __test_facility(nr, kvm->arch.model.fac_mask) &&
173 __test_facility(nr, kvm->arch.model.fac_list);
174}
175
176static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
177{
178 unsigned char *ptr;
179
180 if (nr >= MAX_FACILITY_BIT)
181 return -EINVAL;
182 ptr = (unsigned char *) fac_list + (nr >> 3);
183 *ptr |= (0x80UL >> (nr & 7));
184 return 0;
185}
186
187static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
188{
189 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
190 return test_bit_inv(nr, kvm->arch.cpu_feat);
191}
192
193/* are cpu states controlled by user space */
194static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
195{
196 return kvm->arch.user_cpu_state_ctrl != 0;
197}
198
199/* implemented in interrupt.c */
200int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
201void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
202enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
203int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
204void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
205void kvm_s390_clear_float_irqs(struct kvm *kvm);
206int __must_check kvm_s390_inject_vm(struct kvm *kvm,
207 struct kvm_s390_interrupt *s390int);
208int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
209 struct kvm_s390_irq *irq);
210static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
211 struct kvm_s390_pgm_info *pgm_info)
212{
213 struct kvm_s390_irq irq = {
214 .type = KVM_S390_PROGRAM_INT,
215 .u.pgm = *pgm_info,
216 };
217
218 return kvm_s390_inject_vcpu(vcpu, &irq);
219}
220static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
221{
222 struct kvm_s390_irq irq = {
223 .type = KVM_S390_PROGRAM_INT,
224 .u.pgm.code = code,
225 };
226
227 return kvm_s390_inject_vcpu(vcpu, &irq);
228}
229struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
230 u64 isc_mask, u32 schid);
231int kvm_s390_reinject_io_int(struct kvm *kvm,
232 struct kvm_s390_interrupt_info *inti);
233int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
234
235/* implemented in intercept.c */
236u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
237int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
238static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
239{
240 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
241
242 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
243}
244static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
245{
246 kvm_s390_rewind_psw(vcpu, -ilen);
247}
248static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
249{
250 /* don't inject PER events if we re-execute the instruction */
251 vcpu->arch.sie_block->icptstatus &= ~0x02;
252 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
253}
254
255int handle_sthyi(struct kvm_vcpu *vcpu);
256
257/* implemented in priv.c */
258int is_valid_psw(psw_t *psw);
259int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
260int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
261int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
262int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
263int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
264int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
265int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
266int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
267int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
268int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
269int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
270
271/* implemented in vsie.c */
272int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
273void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
274void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
275 unsigned long end);
276void kvm_s390_vsie_init(struct kvm *kvm);
277void kvm_s390_vsie_destroy(struct kvm *kvm);
278
279/* implemented in sigp.c */
280int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
281int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
282
283/* implemented in kvm-s390.c */
284void kvm_s390_set_tod_clock(struct kvm *kvm,
285 const struct kvm_s390_vm_tod_clock *gtod);
286long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
287int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
288int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
289void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
290void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
291void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
292void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
293bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
294void exit_sie(struct kvm_vcpu *vcpu);
295void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
296int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
297void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
298void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
299__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
300
301/* implemented in diag.c */
302int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
303
304static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
305{
306 int i;
307 struct kvm_vcpu *vcpu;
308
309 WARN_ON(!mutex_is_locked(&kvm->lock));
310 kvm_for_each_vcpu(i, vcpu, kvm)
311 kvm_s390_vcpu_block(vcpu);
312}
313
314static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
315{
316 int i;
317 struct kvm_vcpu *vcpu;
318
319 kvm_for_each_vcpu(i, vcpu, kvm)
320 kvm_s390_vcpu_unblock(vcpu);
321}
322
323static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
324{
325 u64 rc;
326
327 preempt_disable();
328 rc = get_tod_clock_fast() + kvm->arch.epoch;
329 preempt_enable();
330 return rc;
331}
332
333/**
334 * kvm_s390_inject_prog_cond - conditionally inject a program check
335 * @vcpu: virtual cpu
336 * @rc: original return/error code
337 *
338 * This function is supposed to be used after regular guest access functions
339 * failed, to conditionally inject a program check to a vcpu. The typical
340 * pattern would look like
341 *
342 * rc = write_guest(vcpu, addr, data, len);
343 * if (rc)
344 * return kvm_s390_inject_prog_cond(vcpu, rc);
345 *
346 * A negative return code from guest access functions implies an internal error
347 * like e.g. out of memory. In these cases no program check should be injected
348 * to the guest.
349 * A positive value implies that an exception happened while accessing a guest's
350 * memory. In this case all data belonging to the corresponding program check
351 * has been stored in vcpu->arch.pgm and can be injected with
352 * kvm_s390_inject_prog_irq().
353 *
354 * Returns: - the original @rc value if @rc was negative (internal error)
355 * - zero if @rc was already zero
356 * - zero or error code from injecting if @rc was positive
357 * (program check injected to @vcpu)
358 */
359static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
360{
361 if (rc <= 0)
362 return rc;
363 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
364}
365
366int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
367 struct kvm_s390_irq *s390irq);
368
369/* implemented in interrupt.c */
370int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
371int psw_extint_disabled(struct kvm_vcpu *vcpu);
372void kvm_s390_destroy_adapters(struct kvm *kvm);
373int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
374extern struct kvm_device_ops kvm_flic_ops;
375int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
376void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
377int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
378 void __user *buf, int len);
379int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
380 __u8 __user *buf, int len);
381void kvm_s390_gisa_init(struct kvm *kvm);
382void kvm_s390_gisa_clear(struct kvm *kvm);
383void kvm_s390_gisa_destroy(struct kvm *kvm);
384int kvm_s390_gib_init(u8 nisc);
385void kvm_s390_gib_destroy(void);
386
387/* implemented in guestdbg.c */
388void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
389void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
390void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
391int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
392 struct kvm_guest_debug *dbg);
393void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
394void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
395int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
396int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
397
398/* support for Basic/Extended SCA handling */
399static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
400{
401 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
402
403 return &sca->ipte_control;
404}
405static inline int kvm_s390_use_sca_entries(void)
406{
407 /*
408 * Without SIGP interpretation, only SRS interpretation (if available)
409 * might use the entries. By not setting the entries and keeping them
410 * invalid, hardware will not access them but intercept.
411 */
412 return sclp.has_sigpif;
413}
414void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
415 struct mcck_volatile_info *mcck_info);
416
417/**
418 * kvm_s390_vcpu_crypto_reset_all
419 *
420 * Reset the crypto attributes for each vcpu. This can be done while the vcpus
421 * are running as each vcpu will be removed from SIE before resetting the crypt
422 * attributes and restored to SIE afterward.
423 *
424 * Note: The kvm->lock must be held while calling this function
425 *
426 * @kvm: the KVM guest
427 */
428void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
429#endif