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1/*
2 * definition for kvm on s390
3 *
4 * Copyright IBM Corp. 2008, 2009
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
13 */
14
15#ifndef ARCH_S390_KVM_S390_H
16#define ARCH_S390_KVM_S390_H
17
18#include <linux/hrtimer.h>
19#include <linux/kvm.h>
20#include <linux/kvm_host.h>
21#include <asm/facility.h>
22#include <asm/processor.h>
23
24typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
25
26/* Transactional Memory Execution related macros */
27#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
28#define TDB_FORMAT1 1
29#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
30
31extern debug_info_t *kvm_s390_dbf;
32#define KVM_EVENT(d_loglevel, d_string, d_args...)\
33do { \
34 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
35 d_args); \
36} while (0)
37
38#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
39do { \
40 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
41 d_args); \
42} while (0)
43
44#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
45do { \
46 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
47 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
48 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
49 d_args); \
50} while (0)
51
52static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
53{
54 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
55}
56
57static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
58{
59 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_WAIT;
60}
61
62static inline int kvm_is_ucontrol(struct kvm *kvm)
63{
64#ifdef CONFIG_KVM_S390_UCONTROL
65 if (kvm->arch.gmap)
66 return 0;
67 return 1;
68#else
69 return 0;
70#endif
71}
72
73#define GUEST_PREFIX_SHIFT 13
74static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
75{
76 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
77}
78
79static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
80{
81 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
82 prefix);
83 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
84 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
85 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
86}
87
88typedef u8 __bitwise ar_t;
89
90static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
91{
92 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
93 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
94
95 if (ar)
96 *ar = base2;
97
98 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
99}
100
101static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
102 u64 *address1, u64 *address2,
103 ar_t *ar_b1, ar_t *ar_b2)
104{
105 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
106 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
107 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
108 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
109
110 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
111 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
112
113 if (ar_b1)
114 *ar_b1 = base1;
115 if (ar_b2)
116 *ar_b2 = base2;
117}
118
119static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
120{
121 if (r1)
122 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
123 if (r2)
124 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
125}
126
127static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
128{
129 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
130 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
131 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
132 /* The displacement is a 20bit _SIGNED_ value */
133 if (disp2 & 0x80000)
134 disp2+=0xfff00000;
135
136 if (ar)
137 *ar = base2;
138
139 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
140}
141
142static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
143{
144 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
145 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
146
147 if (ar)
148 *ar = base2;
149
150 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
151}
152
153/* Set the condition code in the guest program status word */
154static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
155{
156 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
157 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
158}
159
160/* test availability of facility in a kvm instance */
161static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
162{
163 return __test_facility(nr, kvm->arch.model.fac_mask) &&
164 __test_facility(nr, kvm->arch.model.fac_list);
165}
166
167static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
168{
169 unsigned char *ptr;
170
171 if (nr >= MAX_FACILITY_BIT)
172 return -EINVAL;
173 ptr = (unsigned char *) fac_list + (nr >> 3);
174 *ptr |= (0x80UL >> (nr & 7));
175 return 0;
176}
177
178/* are cpu states controlled by user space */
179static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
180{
181 return kvm->arch.user_cpu_state_ctrl != 0;
182}
183
184/* implemented in interrupt.c */
185int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
186void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
187enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
188int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
189void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
190void kvm_s390_clear_float_irqs(struct kvm *kvm);
191int __must_check kvm_s390_inject_vm(struct kvm *kvm,
192 struct kvm_s390_interrupt *s390int);
193int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
194 struct kvm_s390_irq *irq);
195static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
196 struct kvm_s390_pgm_info *pgm_info)
197{
198 struct kvm_s390_irq irq = {
199 .type = KVM_S390_PROGRAM_INT,
200 .u.pgm = *pgm_info,
201 };
202
203 return kvm_s390_inject_vcpu(vcpu, &irq);
204}
205static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
206{
207 struct kvm_s390_irq irq = {
208 .type = KVM_S390_PROGRAM_INT,
209 .u.pgm.code = code,
210 };
211
212 return kvm_s390_inject_vcpu(vcpu, &irq);
213}
214struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
215 u64 isc_mask, u32 schid);
216int kvm_s390_reinject_io_int(struct kvm *kvm,
217 struct kvm_s390_interrupt_info *inti);
218int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
219
220/* implemented in intercept.c */
221u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
222int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
223static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
224{
225 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
226
227 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
228}
229static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
230{
231 kvm_s390_rewind_psw(vcpu, -ilen);
232}
233static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
234{
235 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
236}
237
238/* implemented in priv.c */
239int is_valid_psw(psw_t *psw);
240int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
241int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
242int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
243int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
244int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
245int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
246int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
247int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
248
249/* implemented in sigp.c */
250int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
251int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
252
253/* implemented in kvm-s390.c */
254void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
255long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
256int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
257int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
258 unsigned long addr);
259int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
260int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
261void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
262void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
263void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
264void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
265void exit_sie(struct kvm_vcpu *vcpu);
266void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
267int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
268void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
269unsigned long kvm_s390_fac_list_mask_size(void);
270extern unsigned long kvm_s390_fac_list_mask[];
271void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
272__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
273
274/* implemented in diag.c */
275int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
276
277static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
278{
279 int i;
280 struct kvm_vcpu *vcpu;
281
282 WARN_ON(!mutex_is_locked(&kvm->lock));
283 kvm_for_each_vcpu(i, vcpu, kvm)
284 kvm_s390_vcpu_block(vcpu);
285}
286
287static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
288{
289 int i;
290 struct kvm_vcpu *vcpu;
291
292 kvm_for_each_vcpu(i, vcpu, kvm)
293 kvm_s390_vcpu_unblock(vcpu);
294}
295
296static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
297{
298 u64 rc;
299
300 preempt_disable();
301 rc = get_tod_clock_fast() + kvm->arch.epoch;
302 preempt_enable();
303 return rc;
304}
305
306/**
307 * kvm_s390_inject_prog_cond - conditionally inject a program check
308 * @vcpu: virtual cpu
309 * @rc: original return/error code
310 *
311 * This function is supposed to be used after regular guest access functions
312 * failed, to conditionally inject a program check to a vcpu. The typical
313 * pattern would look like
314 *
315 * rc = write_guest(vcpu, addr, data, len);
316 * if (rc)
317 * return kvm_s390_inject_prog_cond(vcpu, rc);
318 *
319 * A negative return code from guest access functions implies an internal error
320 * like e.g. out of memory. In these cases no program check should be injected
321 * to the guest.
322 * A positive value implies that an exception happened while accessing a guest's
323 * memory. In this case all data belonging to the corresponding program check
324 * has been stored in vcpu->arch.pgm and can be injected with
325 * kvm_s390_inject_prog_irq().
326 *
327 * Returns: - the original @rc value if @rc was negative (internal error)
328 * - zero if @rc was already zero
329 * - zero or error code from injecting if @rc was positive
330 * (program check injected to @vcpu)
331 */
332static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
333{
334 if (rc <= 0)
335 return rc;
336 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
337}
338
339int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
340 struct kvm_s390_irq *s390irq);
341
342/* implemented in interrupt.c */
343int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
344int psw_extint_disabled(struct kvm_vcpu *vcpu);
345void kvm_s390_destroy_adapters(struct kvm *kvm);
346int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
347extern struct kvm_device_ops kvm_flic_ops;
348int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
349void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
350int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
351 void __user *buf, int len);
352int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
353 __u8 __user *buf, int len);
354
355/* implemented in guestdbg.c */
356void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
357void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
358void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
359int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
360 struct kvm_guest_debug *dbg);
361void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
362void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
363void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
364
365/* support for Basic/Extended SCA handling */
366static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
367{
368 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
369
370 return &sca->ipte_control;
371}
372#endif
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
28extern debug_info_t *kvm_s390_dbf;
29extern debug_info_t *kvm_s390_dbf_uv;
30
31#define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
32do { \
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...)\
41do { \
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...)\
47do { \
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...)\
53do { \
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
60static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
61{
62 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
63}
64
65static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
66{
67 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
68}
69
70static 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
75static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
76{
77 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
78}
79
80static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
81{
82 return test_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.idle_mask);
83}
84
85static 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
97static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
98{
99 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
100}
101
102static 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_MMU_RELOAD, vcpu);
109}
110
111static 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
122static 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
140static 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
148static 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
163static 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 */
175static 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 */
182static 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
188static 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
199static 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 */
206static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
207{
208 return kvm->arch.user_cpu_state_ctrl != 0;
209}
210
211/* implemented in pv.c */
212int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
213int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
214int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
215int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
216int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
217 u16 *rrc);
218int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
219 unsigned long tweak, u16 *rc, u16 *rrc);
220int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
221
222static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
223{
224 return kvm->arch.pv.handle;
225}
226
227static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
228{
229 return vcpu->arch.pv.handle;
230}
231
232static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
233{
234 lockdep_assert_held(&kvm->lock);
235 return !!kvm_s390_pv_get_handle(kvm);
236}
237
238static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
239{
240 lockdep_assert_held(&vcpu->mutex);
241 return !!kvm_s390_pv_cpu_get_handle(vcpu);
242}
243
244/* implemented in interrupt.c */
245int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
246void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
247enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
248int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
249void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
250void kvm_s390_clear_float_irqs(struct kvm *kvm);
251int __must_check kvm_s390_inject_vm(struct kvm *kvm,
252 struct kvm_s390_interrupt *s390int);
253int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
254 struct kvm_s390_irq *irq);
255static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
256 struct kvm_s390_pgm_info *pgm_info)
257{
258 struct kvm_s390_irq irq = {
259 .type = KVM_S390_PROGRAM_INT,
260 .u.pgm = *pgm_info,
261 };
262
263 return kvm_s390_inject_vcpu(vcpu, &irq);
264}
265static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
266{
267 struct kvm_s390_irq irq = {
268 .type = KVM_S390_PROGRAM_INT,
269 .u.pgm.code = code,
270 };
271
272 return kvm_s390_inject_vcpu(vcpu, &irq);
273}
274struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
275 u64 isc_mask, u32 schid);
276int kvm_s390_reinject_io_int(struct kvm *kvm,
277 struct kvm_s390_interrupt_info *inti);
278int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
279
280/* implemented in intercept.c */
281u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
282int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
283static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
284{
285 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
286
287 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
288}
289static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
290{
291 kvm_s390_rewind_psw(vcpu, -ilen);
292}
293static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
294{
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));
298}
299
300int handle_sthyi(struct kvm_vcpu *vcpu);
301
302/* implemented in priv.c */
303int is_valid_psw(psw_t *psw);
304int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
305int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
306int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
307int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
308int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
309int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
310int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
311int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
312int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
313int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
314int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
315
316/* implemented in vsie.c */
317int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
318void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
319void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
320 unsigned long end);
321void kvm_s390_vsie_init(struct kvm *kvm);
322void kvm_s390_vsie_destroy(struct kvm *kvm);
323
324/* implemented in sigp.c */
325int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
326int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
327
328/* implemented in kvm-s390.c */
329void kvm_s390_set_tod_clock(struct kvm *kvm,
330 const struct kvm_s390_vm_tod_clock *gtod);
331long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
332int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
333int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
334int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
335int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
336void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
337void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
338bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
339void exit_sie(struct kvm_vcpu *vcpu);
340void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
341int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
342void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
343void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
344__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
345
346/* implemented in diag.c */
347int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
348
349static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
350{
351 int i;
352 struct kvm_vcpu *vcpu;
353
354 WARN_ON(!mutex_is_locked(&kvm->lock));
355 kvm_for_each_vcpu(i, vcpu, kvm)
356 kvm_s390_vcpu_block(vcpu);
357}
358
359static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
360{
361 int i;
362 struct kvm_vcpu *vcpu;
363
364 kvm_for_each_vcpu(i, vcpu, kvm)
365 kvm_s390_vcpu_unblock(vcpu);
366}
367
368static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
369{
370 u64 rc;
371
372 preempt_disable();
373 rc = get_tod_clock_fast() + kvm->arch.epoch;
374 preempt_enable();
375 return rc;
376}
377
378/**
379 * kvm_s390_inject_prog_cond - conditionally inject a program check
380 * @vcpu: virtual cpu
381 * @rc: original return/error code
382 *
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
386 *
387 * rc = write_guest(vcpu, addr, data, len);
388 * if (rc)
389 * return kvm_s390_inject_prog_cond(vcpu, rc);
390 *
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
393 * to the guest.
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().
398 *
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)
403 */
404static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
405{
406 if (rc <= 0)
407 return rc;
408 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
409}
410
411int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
412 struct kvm_s390_irq *s390irq);
413
414/* implemented in interrupt.c */
415int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
416int psw_extint_disabled(struct kvm_vcpu *vcpu);
417void kvm_s390_destroy_adapters(struct kvm *kvm);
418int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
419extern struct kvm_device_ops kvm_flic_ops;
420int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
421void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
422int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
423 void __user *buf, int len);
424int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
425 __u8 __user *buf, int len);
426void kvm_s390_gisa_init(struct kvm *kvm);
427void kvm_s390_gisa_clear(struct kvm *kvm);
428void kvm_s390_gisa_destroy(struct kvm *kvm);
429int kvm_s390_gib_init(u8 nisc);
430void kvm_s390_gib_destroy(void);
431
432/* implemented in guestdbg.c */
433void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
434void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
435void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
436int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
437 struct kvm_guest_debug *dbg);
438void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
439void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
440int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
441int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
442
443/* support for Basic/Extended SCA handling */
444static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
445{
446 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
447
448 return &sca->ipte_control;
449}
450static inline int kvm_s390_use_sca_entries(void)
451{
452 /*
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.
456 */
457 return sclp.has_sigpif;
458}
459void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
460 struct mcck_volatile_info *mcck_info);
461
462/**
463 * kvm_s390_vcpu_crypto_reset_all
464 *
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.
468 *
469 * Note: The kvm->lock must be held while calling this function
470 *
471 * @kvm: the KVM guest
472 */
473void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
474
475/**
476 * diag9c_forwarding_hz
477 *
478 * Set the maximum number of diag9c forwarding per second
479 */
480extern unsigned int diag9c_forwarding_hz;
481
482#endif