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Merge tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux
[deliverable/linux.git] / arch / s390 / kvm / kvm-s390.h
CommitLineData
b0c632db 1/*
a53c8fab 2 * definition for kvm on s390
b0c632db 3 *
a53c8fab 4 * Copyright IBM Corp. 2008, 2009
b0c632db
HC		 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>
628eb9b8 12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
b0c632db
HC		 13 */
14
15#ifndef ARCH_S390_KVM_S390_H
16#define ARCH_S390_KVM_S390_H
8f2abe6a 17
ca872302 18#include <linux/hrtimer.h>
ba5c1e9b 19#include <linux/kvm.h>
8f2abe6a 20#include <linux/kvm_host.h>
9d8d5786 21#include <asm/facility.h>
0e8bc06a 22#include <asm/processor.h>
8f2abe6a
CB		 23
24typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
25
7feb6bb8
MM		 26/* Transactional Memory Execution related macros */
27#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
7feb6bb8
MM		 28#define TDB_FORMAT1 1
29#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
30
78f26131
CB		 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
b0c632db
HC		 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)
ba5c1e9b 51
7a42fdc2 52static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 53{
7a42fdc2 54 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
ba5c1e9b
CO		 55}
56
5ebda316
DH		 57static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
58{
94a15de8 59 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
5ebda316
DH		 60}
61
e08b9637
CO		 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}
8d26cf7b 72
fda902cb
MM		 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
8d26cf7b
CB		 79static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
80{
71db35d2
CB		 81 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
82 prefix);
fda902cb 83 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 84 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 85 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 86}
87
8ae04b8f
AY		 88typedef u8 __bitwise ar_t;
89
90static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
b1c571a5 91{
0c29b229
CB		 92 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
93 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 94
8ae04b8f
AY		 95 if (ar)
96 *ar = base2;
97
b1c571a5
CH		 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,
8ae04b8f
AY		 102 u64 *address1, u64 *address2,
103 ar_t *ar_b1, ar_t *ar_b2)
b1c571a5 104{
0c29b229
CB		 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;
b1c571a5
CH		 109
110 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
111 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
8ae04b8f
AY		 112
113 if (ar_b1)
114 *ar_b1 = base1;
115 if (ar_b2)
116 *ar_b2 = base2;
b1c571a5
CH		 117}
118
69d0d3a3
CB		 119static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
120{
ff7158b2
TH		 121 if (r1)
122 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
123 if (r2)
124 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 125}
126
8ae04b8f 127static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
b1c571a5 128{
0c29b229
CB		 129 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
130 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 131 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 132 /* The displacement is a 20bit _SIGNED_ value */
133 if (disp2 & 0x80000)
134 disp2+=0xfff00000;
b1c571a5 135
8ae04b8f
AY		 136 if (ar)
137 *ar = base2;
138
0c29b229 139 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 140}
141
8ae04b8f 142static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
b1c571a5 143{
0c29b229
CB		 144 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
145 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 146
8ae04b8f
AY		 147 if (ar)
148 *ar = base2;
149
b1c571a5
CH		 150 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
151}
152
ea828ebf
TH		 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
1e8d2424 160/* test availability of facility in a kvm instance */
9d8d5786
MM		 161static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
162{
c54f0d6a
DH		 163 return __test_facility(nr, kvm->arch.model.fac_mask) &&
164 __test_facility(nr, kvm->arch.model.fac_list);
9d8d5786
MM		 165}
166
18280d8b
MM		 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
15c9705f
DH		 178static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
179{
180 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
181 return test_bit_inv(nr, kvm->arch.cpu_feat);
182}
183
6352e4d2
DH		 184/* are cpu states controlled by user space */
185static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
186{
187 return kvm->arch.user_cpu_state_ctrl != 0;
188}
189
66933b78 190/* implemented in interrupt.c */
ba5c1e9b 191int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 192void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 193enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 194int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 195void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 196void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 197int __must_check kvm_s390_inject_vm(struct kvm *kvm,
198 struct kvm_s390_interrupt *s390int);
199int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
383d0b05 200 struct kvm_s390_irq *irq);
66933b78
DH		 201static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
202 struct kvm_s390_pgm_info *pgm_info)
203{
204 struct kvm_s390_irq irq = {
205 .type = KVM_S390_PROGRAM_INT,
206 .u.pgm = *pgm_info,
207 };
208
209 return kvm_s390_inject_vcpu(vcpu, &irq);
210}
211static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
212{
213 struct kvm_s390_irq irq = {
214 .type = KVM_S390_PROGRAM_INT,
215 .u.pgm.code = code,
216 };
217
218 return kvm_s390_inject_vcpu(vcpu, &irq);
219}
fa6b7fe9 220struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241 221 u64 isc_mask, u32 schid);
15462e37
DH		 222int kvm_s390_reinject_io_int(struct kvm *kvm,
223 struct kvm_s390_interrupt_info *inti);
841b91c5 224int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 225
04b41acd 226/* implemented in intercept.c */
0e8bc06a 227u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
04b41acd 228int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
0e8bc06a
DH		 229static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
230{
231 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
232
233 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
234}
235static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
236{
237 kvm_s390_rewind_psw(vcpu, -ilen);
238}
239static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
240{
5ffe466c
DH		 241 /* don't inject PER events if we re-execute the instruction */
242 vcpu->arch.sie_block->icptstatus &= ~0x02;
0e8bc06a
DH		 243 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
244}
04b41acd 245
453423dc 246/* implemented in priv.c */
a3fb577e 247int is_valid_psw(psw_t *psw);
70455a36 248int kvm_s390_handle_b2(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);
5288fbf0 256
a3508fbe
DH		 257/* implemented in vsie.c */
258int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
adbf1698 259void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
a3508fbe
DH		 260void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
261 unsigned long end);
262void kvm_s390_vsie_init(struct kvm *kvm);
263void kvm_s390_vsie_destroy(struct kvm *kvm);
264
5288fbf0
CB		 265/* implemented in sigp.c */
266int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
4953919f 267int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
5288fbf0 268
95ca2cb5
JF		 269/* implemented in sthyi.c */
270int handle_sthyi(struct kvm_vcpu *vcpu);
271
5288fbf0 272/* implemented in kvm-s390.c */
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 275int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
bc17de7c
EF		 276int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
277 unsigned long addr);
e879892c 278int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
bc17de7c 279int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
6852d7b6
DH		 280void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
281void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
27406cd5
CB		 282void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
283void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
49b99e1e 284void exit_sie(struct kvm_vcpu *vcpu);
8e236546 285void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
b31605c1
DD		 286int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
287void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
9d8d5786
MM		 288unsigned long kvm_s390_fac_list_mask_size(void);
289extern unsigned long kvm_s390_fac_list_mask[];
4287f247
DH		 290void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
291__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
b31605c1 292
e28acfea
CB		 293/* implemented in diag.c */
294int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
295
27406cd5
CB		 296static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
297{
298 int i;
299 struct kvm_vcpu *vcpu;
300
301 WARN_ON(!mutex_is_locked(&kvm->lock));
302 kvm_for_each_vcpu(i, vcpu, kvm)
303 kvm_s390_vcpu_block(vcpu);
304}
305
306static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
307{
308 int i;
309 struct kvm_vcpu *vcpu;
310
311 kvm_for_each_vcpu(i, vcpu, kvm)
312 kvm_s390_vcpu_unblock(vcpu);
313}
314
60417fcc
DH		 315static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
316{
317 u64 rc;
318
319 preempt_disable();
320 rc = get_tod_clock_fast() + kvm->arch.epoch;
321 preempt_enable();
322 return rc;
323}
324
1b0462e5
HC		 325/**
326 * kvm_s390_inject_prog_cond - conditionally inject a program check
327 * @vcpu: virtual cpu
328 * @rc: original return/error code
329 *
330 * This function is supposed to be used after regular guest access functions
331 * failed, to conditionally inject a program check to a vcpu. The typical
332 * pattern would look like
333 *
334 * rc = write_guest(vcpu, addr, data, len);
335 * if (rc)
336 * return kvm_s390_inject_prog_cond(vcpu, rc);
337 *
338 * A negative return code from guest access functions implies an internal error
339 * like e.g. out of memory. In these cases no program check should be injected
340 * to the guest.
341 * A positive value implies that an exception happened while accessing a guest's
342 * memory. In this case all data belonging to the corresponding program check
343 * has been stored in vcpu->arch.pgm and can be injected with
344 * kvm_s390_inject_prog_irq().
345 *
346 * Returns: - the original @rc value if @rc was negative (internal error)
347 * - zero if @rc was already zero
348 * - zero or error code from injecting if @rc was positive
349 * (program check injected to @vcpu)
350 */
351static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
352{
353 if (rc <= 0)
354 return rc;
355 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
356}
357
383d0b05
JF		 358int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
359 struct kvm_s390_irq *s390irq);
360
3c038e6b 361/* implemented in interrupt.c */
9a022067 362int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
3c038e6b 363int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 364void kvm_s390_destroy_adapters(struct kvm *kvm);
ea5f4969 365int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
84877d93 366extern struct kvm_device_ops kvm_flic_ops;
6cddd432
DH		 367int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
368void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
816c7667
JF		 369int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
370 void __user *buf, int len);
371int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
372 __u8 __user *buf, int len);
3c038e6b 373
27291e21
DH		 374/* implemented in guestdbg.c */
375void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
376void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
377void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
378int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
379 struct kvm_guest_debug *dbg);
380void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
381void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
5ffe466c 382int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
27291e21
DH		 383void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
384
60514510
ED		 385/* support for Basic/Extended SCA handling */
386static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
387{
bc784cce
ED		 388 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
389
390 return &sca->ipte_control;
60514510 391}
b0c632db 392#endif
Linux kernel - Deliverables
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