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[mirror_ubuntu-focal-kernel.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
CB		 21
22typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
23
7feb6bb8 24/* Transactional Memory Execution related macros */
0c9d8683 25#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
7feb6bb8
MM		 26#define TDB_FORMAT1 1
27#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
28
78f26131
CB		 29extern debug_info_t *kvm_s390_dbf;
30#define KVM_EVENT(d_loglevel, d_string, d_args...)\
31do { \
32 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
33 d_args); \
34} while (0)
35
b0c632db
HC		 36#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
37do { \
38 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
39 d_args); \
40} while (0)
41
42#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
43do { \
44 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
45 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
46 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
47 d_args); \
48} while (0)
ba5c1e9b 49
7a42fdc2 50static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 51{
7a42fdc2 52 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
ba5c1e9b
CO		 53}
54
5ebda316
DH		 55static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
56{
94a15de8 57 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
5ebda316
DH		 58}
59
e08b9637
CO		 60static inline int kvm_is_ucontrol(struct kvm *kvm)
61{
62#ifdef CONFIG_KVM_S390_UCONTROL
63 if (kvm->arch.gmap)
64 return 0;
65 return 1;
66#else
67 return 0;
68#endif
69}
8d26cf7b 70
fda902cb
MM		 71#define GUEST_PREFIX_SHIFT 13
72static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
73{
74 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
75}
76
8d26cf7b
CB		 77static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
78{
71db35d2
CB		 79 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
80 prefix);
fda902cb 81 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 82 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 83 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 84}
85
27f67f87 86static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 87{
0c29b229
CB		 88 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
89 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 90
8ae04b8f
AY		 91 if (ar)
92 *ar = base2;
93
b1c571a5
CH		 94 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
95}
96
97static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
8ae04b8f 98 u64 *address1, u64 *address2,
27f67f87 99 u8 *ar_b1, u8 *ar_b2)
b1c571a5 100{
0c29b229
CB		 101 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
102 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
103 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
104 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
b1c571a5
CH		 105
106 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
107 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
8ae04b8f
AY		 108
109 if (ar_b1)
110 *ar_b1 = base1;
111 if (ar_b2)
112 *ar_b2 = base2;
b1c571a5
CH		 113}
114
69d0d3a3
CB		 115static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
116{
ff7158b2
TH		 117 if (r1)
118 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
119 if (r2)
120 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 121}
122
27f67f87 123static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 124{
0c29b229
CB		 125 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
126 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 127 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 128 /* The displacement is a 20bit _SIGNED_ value */
129 if (disp2 & 0x80000)
130 disp2+=0xfff00000;
b1c571a5 131
8ae04b8f
AY		 132 if (ar)
133 *ar = base2;
134
0c29b229 135 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 136}
137
27f67f87 138static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 139{
0c29b229
CB		 140 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
141 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 142
8ae04b8f
AY		 143 if (ar)
144 *ar = base2;
145
b1c571a5
CH		 146 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
147}
148
ea828ebf
TH		 149/* Set the condition code in the guest program status word */
150static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
151{
152 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
153 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
154}
155
1e8d2424 156/* test availability of facility in a kvm instance */
9d8d5786
MM		 157static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
158{
c54f0d6a
DH		 159 return __test_facility(nr, kvm->arch.model.fac_mask) &&
160 __test_facility(nr, kvm->arch.model.fac_list);
9d8d5786
MM		 161}
162
18280d8b
MM		 163static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
164{
165 unsigned char *ptr;
166
167 if (nr >= MAX_FACILITY_BIT)
168 return -EINVAL;
169 ptr = (unsigned char *) fac_list + (nr >> 3);
170 *ptr |= (0x80UL >> (nr & 7));
171 return 0;
172}
173
15c9705f
DH		 174static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
175{
176 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
177 return test_bit_inv(nr, kvm->arch.cpu_feat);
178}
179
6352e4d2
DH		 180/* are cpu states controlled by user space */
181static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
182{
183 return kvm->arch.user_cpu_state_ctrl != 0;
184}
185
66933b78 186/* implemented in interrupt.c */
ba5c1e9b 187int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 188void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 189enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 190int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 191void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 192void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 193int __must_check kvm_s390_inject_vm(struct kvm *kvm,
194 struct kvm_s390_interrupt *s390int);
195int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
383d0b05 196 struct kvm_s390_irq *irq);
66933b78
DH		 197static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
198 struct kvm_s390_pgm_info *pgm_info)
199{
200 struct kvm_s390_irq irq = {
201 .type = KVM_S390_PROGRAM_INT,
202 .u.pgm = *pgm_info,
203 };
204
205 return kvm_s390_inject_vcpu(vcpu, &irq);
206}
207static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
208{
209 struct kvm_s390_irq irq = {
210 .type = KVM_S390_PROGRAM_INT,
211 .u.pgm.code = code,
212 };
213
214 return kvm_s390_inject_vcpu(vcpu, &irq);
215}
fa6b7fe9 216struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241 217 u64 isc_mask, u32 schid);
15462e37
DH		 218int kvm_s390_reinject_io_int(struct kvm *kvm,
219 struct kvm_s390_interrupt_info *inti);
841b91c5 220int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 221
04b41acd 222/* implemented in intercept.c */
0e8bc06a 223u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
04b41acd 224int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
0e8bc06a
DH		 225static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
226{
227 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
228
229 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
230}
231static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
232{
233 kvm_s390_rewind_psw(vcpu, -ilen);
234}
235static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
236{
5ffe466c
DH		 237 /* don't inject PER events if we re-execute the instruction */
238 vcpu->arch.sie_block->icptstatus &= ~0x02;
0e8bc06a
DH		 239 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
240}
04b41acd 241
b7c92f1a
QH		 242int handle_sthyi(struct kvm_vcpu *vcpu);
243
453423dc 244/* implemented in priv.c */
a3fb577e 245int is_valid_psw(psw_t *psw);
80cd8763 246int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
70455a36 247int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
4e0b1ab7 248int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
bb25b9ba 249int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
8c3f61e2 250int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
48a3e950
CH		 251int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
252int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
aba07508 253int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
953ed88d
TH		 254int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
255int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
730cd632 256int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
5288fbf0 257
a3508fbe
DH		 258/* implemented in vsie.c */
259int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
adbf1698 260void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
a3508fbe
DH		 261void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
262 unsigned long end);
263void kvm_s390_vsie_init(struct kvm *kvm);
264void kvm_s390_vsie_destroy(struct kvm *kvm);
265
5288fbf0
CB		 266/* implemented in sigp.c */
267int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
4953919f 268int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
5288fbf0
CB		 269
270/* implemented in kvm-s390.c */
8fa1696e
CW		 271void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
272 const struct kvm_s390_vm_tod_clock *gtod);
25ed1675 273void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
fa576c58 274long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
e879892c
TH		 275int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
276int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
6852d7b6
DH		 277void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
278void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
27406cd5
CB		 279void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
280void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
49b99e1e 281void exit_sie(struct kvm_vcpu *vcpu);
8e236546 282void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
b31605c1
DD		 283int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
284void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
9d8d5786
MM		 285unsigned long kvm_s390_fac_list_mask_size(void);
286extern unsigned long kvm_s390_fac_list_mask[];
4287f247
DH		 287void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
288__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
b31605c1 289
e28acfea
CB		 290/* implemented in diag.c */
291int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
292
27406cd5
CB		 293static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
294{
295 int i;
296 struct kvm_vcpu *vcpu;
297
298 WARN_ON(!mutex_is_locked(&kvm->lock));
299 kvm_for_each_vcpu(i, vcpu, kvm)
300 kvm_s390_vcpu_block(vcpu);
301}
302
303static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
304{
305 int i;
306 struct kvm_vcpu *vcpu;
307
308 kvm_for_each_vcpu(i, vcpu, kvm)
309 kvm_s390_vcpu_unblock(vcpu);
310}
311
60417fcc
DH		 312static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
313{
314 u64 rc;
315
316 preempt_disable();
317 rc = get_tod_clock_fast() + kvm->arch.epoch;
318 preempt_enable();
319 return rc;
320}
321
1b0462e5
HC		 322/**
323 * kvm_s390_inject_prog_cond - conditionally inject a program check
324 * @vcpu: virtual cpu
325 * @rc: original return/error code
326 *
327 * This function is supposed to be used after regular guest access functions
328 * failed, to conditionally inject a program check to a vcpu. The typical
329 * pattern would look like
330 *
331 * rc = write_guest(vcpu, addr, data, len);
332 * if (rc)
333 * return kvm_s390_inject_prog_cond(vcpu, rc);
334 *
335 * A negative return code from guest access functions implies an internal error
336 * like e.g. out of memory. In these cases no program check should be injected
337 * to the guest.
338 * A positive value implies that an exception happened while accessing a guest's
339 * memory. In this case all data belonging to the corresponding program check
340 * has been stored in vcpu->arch.pgm and can be injected with
341 * kvm_s390_inject_prog_irq().
342 *
343 * Returns: - the original @rc value if @rc was negative (internal error)
344 * - zero if @rc was already zero
345 * - zero or error code from injecting if @rc was positive
346 * (program check injected to @vcpu)
347 */
348static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
349{
350 if (rc <= 0)
351 return rc;
352 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
353}
354
383d0b05
JF		 355int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
356 struct kvm_s390_irq *s390irq);
357
3c038e6b 358/* implemented in interrupt.c */
9a022067 359int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
3c038e6b 360int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 361void kvm_s390_destroy_adapters(struct kvm *kvm);
ea5f4969 362int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
84877d93 363extern struct kvm_device_ops kvm_flic_ops;
6cddd432
DH		 364int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
365void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
816c7667
JF		 366int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
367 void __user *buf, int len);
368int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
369 __u8 __user *buf, int len);
3c038e6b 370
27291e21
DH		 371/* implemented in guestdbg.c */
372void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
373void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
374void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
375int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
376 struct kvm_guest_debug *dbg);
377void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
378void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
5ffe466c 379int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
a69cbe81 380int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
27291e21 381
60514510
ED		 382/* support for Basic/Extended SCA handling */
383static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
384{
bc784cce
ED		 385 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
386
387 return &sca->ipte_control;
60514510 388}
a6940674
DH		 389static inline int kvm_s390_use_sca_entries(void)
390{
391 /*
392 * Without SIGP interpretation, only SRS interpretation (if available)
393 * might use the entries. By not setting the entries and keeping them
394 * invalid, hardware will not access them but intercept.
395 */
396 return sclp.has_sigpif;
397}
4d62fcc0
QH		 398void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
399 struct mcck_volatile_info *mcck_info);
b0c632db 400#endif
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