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Merge tag 'fuse-update-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mszered...
[linux-2.6-block.git] / arch / s390 / kvm / kvm-s390.h
CommitLineData
d809aa23 1/* SPDX-License-Identifier: GPL-2.0 */
b0c632db 2/*
a53c8fab 3 * definition for kvm on s390
b0c632db 4 *
a53c8fab 5 * Copyright IBM Corp. 2008, 2009
b0c632db 6 *
b0c632db
HC		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
628eb9b8 9 * Christian Ehrhardt <ehrhardt@de.ibm.com>
b0c632db
HC		 10 */
11
12#ifndef ARCH_S390_KVM_S390_H
13#define ARCH_S390_KVM_S390_H
8f2abe6a 14
ca872302 15#include <linux/hrtimer.h>
ba5c1e9b 16#include <linux/kvm.h>
8f2abe6a 17#include <linux/kvm_host.h>
9d8d5786 18#include <asm/facility.h>
0e8bc06a 19#include <asm/processor.h>
a6940674 20#include <asm/sclp.h>
8f2abe6a 21
7feb6bb8 22/* Transactional Memory Execution related macros */
0c9d8683 23#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
7feb6bb8
MM		 24#define TDB_FORMAT1 1
25#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
26
78f26131
CB		 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
b0c632db
HC		 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)
ba5c1e9b 47
2018224d
DH		 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
9daecfc6
DH		 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
8d5fb0dc
DH		 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
7a42fdc2 63static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 64{
8d5fb0dc 65 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
ba5c1e9b
CO		 66}
67
5ebda316
DH		 68static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
69{
a9f6c9a9 70 return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
5ebda316
DH		 71}
72
e08b9637
CO		 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}
8d26cf7b 83
fda902cb
MM		 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
8d26cf7b
CB		 90static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
91{
71db35d2
CB		 92 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
93 prefix);
fda902cb 94 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 95 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 96 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 97}
98
27f67f87 99static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 100{
0c29b229
CB		 101 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
102 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 103
8ae04b8f
AY		 104 if (ar)
105 *ar = base2;
106
b1c571a5
CH		 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,
8ae04b8f 111 u64 *address1, u64 *address2,
27f67f87 112 u8 *ar_b1, u8 *ar_b2)
b1c571a5 113{
0c29b229
CB		 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;
b1c571a5
CH		 118
119 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
120 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
8ae04b8f
AY		 121
122 if (ar_b1)
123 *ar_b1 = base1;
124 if (ar_b2)
125 *ar_b2 = base2;
b1c571a5
CH		 126}
127
69d0d3a3
CB		 128static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
129{
ff7158b2
TH		 130 if (r1)
131 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
132 if (r2)
133 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 134}
135
27f67f87 136static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 137{
0c29b229
CB		 138 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
139 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 140 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 141 /* The displacement is a 20bit _SIGNED_ value */
142 if (disp2 & 0x80000)
143 disp2+=0xfff00000;
b1c571a5 144
8ae04b8f
AY		 145 if (ar)
146 *ar = base2;
147
0c29b229 148 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 149}
150
27f67f87 151static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 152{
0c29b229
CB		 153 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
154 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 155
8ae04b8f
AY		 156 if (ar)
157 *ar = base2;
158
b1c571a5
CH		 159 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
160}
161
ea828ebf
TH		 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
1e8d2424 169/* test availability of facility in a kvm instance */
9d8d5786
MM		 170static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
171{
c54f0d6a
DH		 172 return __test_facility(nr, kvm->arch.model.fac_mask) &&
173 __test_facility(nr, kvm->arch.model.fac_list);
9d8d5786
MM		 174}
175
18280d8b
MM		 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
15c9705f
DH		 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
6352e4d2
DH		 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
66933b78 199/* implemented in interrupt.c */
ba5c1e9b 200int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 201void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 202enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 203int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 204void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 205void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 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,
383d0b05 209 struct kvm_s390_irq *irq);
66933b78
DH		 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}
fa6b7fe9 229struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241 230 u64 isc_mask, u32 schid);
15462e37
DH		 231int kvm_s390_reinject_io_int(struct kvm *kvm,
232 struct kvm_s390_interrupt_info *inti);
841b91c5 233int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 234
04b41acd 235/* implemented in intercept.c */
0e8bc06a 236u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
04b41acd 237int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
0e8bc06a
DH		 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{
5ffe466c
DH		 250 /* don't inject PER events if we re-execute the instruction */
251 vcpu->arch.sie_block->icptstatus &= ~0x02;
0e8bc06a
DH		 252 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
253}
04b41acd 254
b7c92f1a
QH		 255int handle_sthyi(struct kvm_vcpu *vcpu);
256
453423dc 257/* implemented in priv.c */
a3fb577e 258int is_valid_psw(psw_t *psw);
80cd8763 259int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
70455a36 260int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
4e0b1ab7 261int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
bb25b9ba 262int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
8c3f61e2 263int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
48a3e950
CH		 264int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
265int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
aba07508 266int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
953ed88d
TH		 267int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
268int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
730cd632 269int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
5288fbf0 270
a3508fbe
DH		 271/* implemented in vsie.c */
272int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
adbf1698 273void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
a3508fbe
DH		 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
5288fbf0
CB		 279/* implemented in sigp.c */
280int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
4953919f 281int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
5288fbf0
CB		 282
283/* implemented in kvm-s390.c */
0e7def5f
DH		 284void kvm_s390_set_tod_clock(struct kvm *kvm,
285 const struct kvm_s390_vm_tod_clock *gtod);
fa576c58 286long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
e879892c
TH		 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);
6852d7b6
DH		 289void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
290void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
27406cd5
CB		 291void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
292void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
49b99e1e 293void exit_sie(struct kvm_vcpu *vcpu);
8e236546 294void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
b31605c1
DD		 295int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
296void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
4287f247
DH		 297void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
298__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
b31605c1 299
e28acfea
CB		 300/* implemented in diag.c */
301int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
302
27406cd5
CB		 303static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
304{
305 int i;
306 struct kvm_vcpu *vcpu;
307
308 WARN_ON(!mutex_is_locked(&kvm->lock));
309 kvm_for_each_vcpu(i, vcpu, kvm)
310 kvm_s390_vcpu_block(vcpu);
311}
312
313static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
314{
315 int i;
316 struct kvm_vcpu *vcpu;
317
318 kvm_for_each_vcpu(i, vcpu, kvm)
319 kvm_s390_vcpu_unblock(vcpu);
320}
321
60417fcc
DH		 322static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
323{
324 u64 rc;
325
326 preempt_disable();
327 rc = get_tod_clock_fast() + kvm->arch.epoch;
328 preempt_enable();
329 return rc;
330}
331
1b0462e5
HC		 332/**
333 * kvm_s390_inject_prog_cond - conditionally inject a program check
334 * @vcpu: virtual cpu
335 * @rc: original return/error code
336 *
337 * This function is supposed to be used after regular guest access functions
338 * failed, to conditionally inject a program check to a vcpu. The typical
339 * pattern would look like
340 *
341 * rc = write_guest(vcpu, addr, data, len);
342 * if (rc)
343 * return kvm_s390_inject_prog_cond(vcpu, rc);
344 *
345 * A negative return code from guest access functions implies an internal error
346 * like e.g. out of memory. In these cases no program check should be injected
347 * to the guest.
348 * A positive value implies that an exception happened while accessing a guest's
349 * memory. In this case all data belonging to the corresponding program check
350 * has been stored in vcpu->arch.pgm and can be injected with
351 * kvm_s390_inject_prog_irq().
352 *
353 * Returns: - the original @rc value if @rc was negative (internal error)
354 * - zero if @rc was already zero
355 * - zero or error code from injecting if @rc was positive
356 * (program check injected to @vcpu)
357 */
358static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
359{
360 if (rc <= 0)
361 return rc;
362 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
363}
364
383d0b05
JF		 365int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
366 struct kvm_s390_irq *s390irq);
367
3c038e6b 368/* implemented in interrupt.c */
9a022067 369int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
3c038e6b 370int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 371void kvm_s390_destroy_adapters(struct kvm *kvm);
ea5f4969 372int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
84877d93 373extern struct kvm_device_ops kvm_flic_ops;
6cddd432
DH		 374int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
375void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
816c7667
JF		 376int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
377 void __user *buf, int len);
378int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
379 __u8 __user *buf, int len);
d7c5cb01
MM		 380void kvm_s390_gisa_init(struct kvm *kvm);
381void kvm_s390_gisa_clear(struct kvm *kvm);
382void kvm_s390_gisa_destroy(struct kvm *kvm);
3c038e6b 383
27291e21
DH		 384/* implemented in guestdbg.c */
385void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
386void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
387void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
388int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
389 struct kvm_guest_debug *dbg);
390void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
391void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
5ffe466c 392int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
a69cbe81 393int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
27291e21 394
60514510
ED		 395/* support for Basic/Extended SCA handling */
396static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
397{
bc784cce
ED		 398 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
399
400 return &sca->ipte_control;
60514510 401}
a6940674
DH		 402static inline int kvm_s390_use_sca_entries(void)
403{
404 /*
405 * Without SIGP interpretation, only SRS interpretation (if available)
406 * might use the entries. By not setting the entries and keeping them
407 * invalid, hardware will not access them but intercept.
408 */
409 return sclp.has_sigpif;
410}
4d62fcc0
QH		 411void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
412 struct mcck_volatile_info *mcck_info);
b0c632db 413#endif
Linux 6.x block layer and io_uring tree(s)