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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) \
27 ((*(char *)phys_to_virt((vcpu)->arch.sie_block->itdba) == TDB_FORMAT1))
28
29extern debug_info_t *kvm_s390_dbf;
30extern debug_info_t *kvm_s390_dbf_uv;
31
32#define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
33do { \
34 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
35 d_args); \
36 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
37 "%d: " d_string "\n", (d_kvm)->userspace_pid, \
38 d_args); \
39} while (0)
40
41#define KVM_EVENT(d_loglevel, d_string, d_args...)\
42do { \
43 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
44 d_args); \
45} while (0)
46
47#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
48do { \
49 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
50 d_args); \
51} while (0)
52
53#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
54do { \
55 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
56 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
57 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
58 d_args); \
59} while (0)
60
61static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
62{
63 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
64}
65
66static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
67{
68 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
69}
70
71static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
72{
73 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
74}
75
76static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
77{
78 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
79}
80
81static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
82{
83 return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
84}
85
86static inline int kvm_is_ucontrol(struct kvm *kvm)
87{
88#ifdef CONFIG_KVM_S390_UCONTROL
89 if (kvm->arch.gmap)
90 return 0;
91 return 1;
92#else
93 return 0;
94#endif
95}
96
97#define GUEST_PREFIX_SHIFT 13
98static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
99{
100 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
101}
102
103static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
104{
105 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
106 prefix);
107 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
108 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
109 kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu);
110}
111
112static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
113{
114 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
115 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
116
117 if (ar)
118 *ar = base2;
119
120 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
121}
122
123static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
124 u64 *address1, u64 *address2,
125 u8 *ar_b1, u8 *ar_b2)
126{
127 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
128 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
129 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
130 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
131
132 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
133 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
134
135 if (ar_b1)
136 *ar_b1 = base1;
137 if (ar_b2)
138 *ar_b2 = base2;
139}
140
141static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
142{
143 if (r1)
144 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
145 if (r2)
146 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
147}
148
149static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
150{
151 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
152 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
153 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
154 /* The displacement is a 20bit _SIGNED_ value */
155 if (disp2 & 0x80000)
156 disp2+=0xfff00000;
157
158 if (ar)
159 *ar = base2;
160
161 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
162}
163
164static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
165{
166 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
167 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
168
169 if (ar)
170 *ar = base2;
171
172 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
173}
174
175/* Set the condition code in the guest program status word */
176static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
177{
178 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
179 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
180}
181
182/* test availability of facility in a kvm instance */
183static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
184{
185 return __test_facility(nr, kvm->arch.model.fac_mask) &&
186 __test_facility(nr, kvm->arch.model.fac_list);
187}
188
189static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
190{
191 unsigned char *ptr;
192
193 if (nr >= MAX_FACILITY_BIT)
194 return -EINVAL;
195 ptr = (unsigned char *) fac_list + (nr >> 3);
196 *ptr |= (0x80UL >> (nr & 7));
197 return 0;
198}
199
200static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
201{
202 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
203 return test_bit_inv(nr, kvm->arch.cpu_feat);
204}
205
206/* are cpu states controlled by user space */
207static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
208{
209 return kvm->arch.user_cpu_state_ctrl != 0;
210}
211
212static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
213{
214 if (kvm->arch.user_cpu_state_ctrl)
215 return;
216
217 VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
218 kvm->arch.user_cpu_state_ctrl = 1;
219}
220
221/* get the end gfn of the last (highest gfn) memslot */
222static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots)
223{
224 struct rb_node *node;
225 struct kvm_memory_slot *ms;
226
227 if (WARN_ON(kvm_memslots_empty(slots)))
228 return 0;
229
230 node = rb_last(&slots->gfn_tree);
231 ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]);
232 return ms->base_gfn + ms->npages;
233}
234
235static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm)
236{
237 u32 gd = virt_to_phys(kvm->arch.gisa_int.origin);
238
239 if (gd && sclp.has_gisaf)
240 gd |= GISA_FORMAT1;
241 return gd;
242}
243
244/* implemented in pv.c */
245int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
246int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
247int kvm_s390_pv_set_aside(struct kvm *kvm, u16 *rc, u16 *rrc);
248int kvm_s390_pv_deinit_aside_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
249int kvm_s390_pv_deinit_cleanup_all(struct kvm *kvm, u16 *rc, u16 *rrc);
250int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
251int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
252int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
253 u16 *rrc);
254int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
255 unsigned long tweak, u16 *rc, u16 *rrc);
256int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
257int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc);
258int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user,
259 u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc);
260int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user,
261 u16 *rc, u16 *rrc);
262
263static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
264{
265 return kvm->arch.pv.handle;
266}
267
268static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
269{
270 return vcpu->arch.pv.handle;
271}
272
273static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
274{
275 lockdep_assert_held(&kvm->lock);
276 return !!kvm_s390_pv_get_handle(kvm);
277}
278
279static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
280{
281 lockdep_assert_held(&vcpu->mutex);
282 return !!kvm_s390_pv_cpu_get_handle(vcpu);
283}
284
285/* implemented in interrupt.c */
286int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
287void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
288enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
289int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
290void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
291void kvm_s390_clear_float_irqs(struct kvm *kvm);
292int __must_check kvm_s390_inject_vm(struct kvm *kvm,
293 struct kvm_s390_interrupt *s390int);
294int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
295 struct kvm_s390_irq *irq);
296static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
297 struct kvm_s390_pgm_info *pgm_info)
298{
299 struct kvm_s390_irq irq = {
300 .type = KVM_S390_PROGRAM_INT,
301 .u.pgm = *pgm_info,
302 };
303
304 return kvm_s390_inject_vcpu(vcpu, &irq);
305}
306static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
307{
308 struct kvm_s390_irq irq = {
309 .type = KVM_S390_PROGRAM_INT,
310 .u.pgm.code = code,
311 };
312
313 return kvm_s390_inject_vcpu(vcpu, &irq);
314}
315struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
316 u64 isc_mask, u32 schid);
317int kvm_s390_reinject_io_int(struct kvm *kvm,
318 struct kvm_s390_interrupt_info *inti);
319int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
320
321/* implemented in intercept.c */
322u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
323int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
324static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
325{
326 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
327
328 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
329}
330static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
331{
332 kvm_s390_rewind_psw(vcpu, -ilen);
333}
334static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
335{
336 /* don't inject PER events if we re-execute the instruction */
337 vcpu->arch.sie_block->icptstatus &= ~0x02;
338 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
339}
340
341int handle_sthyi(struct kvm_vcpu *vcpu);
342
343/* implemented in priv.c */
344int is_valid_psw(psw_t *psw);
345int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
346int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
347int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
348int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
349int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
350int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
351int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
352int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
353int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
354int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
355int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
356
357/* implemented in vsie.c */
358int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
359void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
360void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
361 unsigned long end);
362void kvm_s390_vsie_init(struct kvm *kvm);
363void kvm_s390_vsie_destroy(struct kvm *kvm);
364
365/* implemented in sigp.c */
366int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
367int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
368
369/* implemented in kvm-s390.c */
370int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
371long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
372int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
373int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
374int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
375int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
376void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
377void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
378bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
379void exit_sie(struct kvm_vcpu *vcpu);
380void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
381int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
382void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
383void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
384__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
385int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc);
386
387/* implemented in diag.c */
388int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
389
390static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
391{
392 unsigned long i;
393 struct kvm_vcpu *vcpu;
394
395 WARN_ON(!mutex_is_locked(&kvm->lock));
396 kvm_for_each_vcpu(i, vcpu, kvm)
397 kvm_s390_vcpu_block(vcpu);
398}
399
400static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
401{
402 unsigned long i;
403 struct kvm_vcpu *vcpu;
404
405 kvm_for_each_vcpu(i, vcpu, kvm)
406 kvm_s390_vcpu_unblock(vcpu);
407}
408
409static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
410{
411 u64 rc;
412
413 preempt_disable();
414 rc = get_tod_clock_fast() + kvm->arch.epoch;
415 preempt_enable();
416 return rc;
417}
418
419/**
420 * kvm_s390_inject_prog_cond - conditionally inject a program check
421 * @vcpu: virtual cpu
422 * @rc: original return/error code
423 *
424 * This function is supposed to be used after regular guest access functions
425 * failed, to conditionally inject a program check to a vcpu. The typical
426 * pattern would look like
427 *
428 * rc = write_guest(vcpu, addr, data, len);
429 * if (rc)
430 * return kvm_s390_inject_prog_cond(vcpu, rc);
431 *
432 * A negative return code from guest access functions implies an internal error
433 * like e.g. out of memory. In these cases no program check should be injected
434 * to the guest.
435 * A positive value implies that an exception happened while accessing a guest's
436 * memory. In this case all data belonging to the corresponding program check
437 * has been stored in vcpu->arch.pgm and can be injected with
438 * kvm_s390_inject_prog_irq().
439 *
440 * Returns: - the original @rc value if @rc was negative (internal error)
441 * - zero if @rc was already zero
442 * - zero or error code from injecting if @rc was positive
443 * (program check injected to @vcpu)
444 */
445static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
446{
447 if (rc <= 0)
448 return rc;
449 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
450}
451
452int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
453 struct kvm_s390_irq *s390irq);
454
455/* implemented in interrupt.c */
456int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
457int psw_extint_disabled(struct kvm_vcpu *vcpu);
458void kvm_s390_destroy_adapters(struct kvm *kvm);
459int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
460extern struct kvm_device_ops kvm_flic_ops;
461int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
462int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu);
463void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
464int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
465 void __user *buf, int len);
466int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
467 __u8 __user *buf, int len);
468void kvm_s390_gisa_init(struct kvm *kvm);
469void kvm_s390_gisa_clear(struct kvm *kvm);
470void kvm_s390_gisa_destroy(struct kvm *kvm);
471void kvm_s390_gisa_disable(struct kvm *kvm);
472void kvm_s390_gisa_enable(struct kvm *kvm);
473int kvm_s390_gib_init(u8 nisc);
474void kvm_s390_gib_destroy(void);
475
476/* implemented in guestdbg.c */
477void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
478void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
479void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
480int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
481 struct kvm_guest_debug *dbg);
482void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
483void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
484int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
485int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
486
487/* support for Basic/Extended SCA handling */
488static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
489{
490 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
491
492 return &sca->ipte_control;
493}
494static inline int kvm_s390_use_sca_entries(void)
495{
496 /*
497 * Without SIGP interpretation, only SRS interpretation (if available)
498 * might use the entries. By not setting the entries and keeping them
499 * invalid, hardware will not access them but intercept.
500 */
501 return sclp.has_sigpif;
502}
503void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
504 struct mcck_volatile_info *mcck_info);
505
506/**
507 * kvm_s390_vcpu_crypto_reset_all
508 *
509 * Reset the crypto attributes for each vcpu. This can be done while the vcpus
510 * are running as each vcpu will be removed from SIE before resetting the crypt
511 * attributes and restored to SIE afterward.
512 *
513 * Note: The kvm->lock must be held while calling this function
514 *
515 * @kvm: the KVM guest
516 */
517void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
518
519/**
520 * kvm_s390_vcpu_pci_enable_interp
521 *
522 * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store
523 * interpretation as well as adapter interruption forwarding.
524 *
525 * @kvm: the KVM guest
526 */
527void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm);
528
529/**
530 * diag9c_forwarding_hz
531 *
532 * Set the maximum number of diag9c forwarding per second
533 */
534extern unsigned int diag9c_forwarding_hz;
535
536#endif