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Merge tag 'juno-fixes-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...
[mirror_ubuntu-artful-kernel.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>
a6940674 23#include <asm/sclp.h>
8f2abe6a
CB		 24
25typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
26
7feb6bb8
MM		 27/* Transactional Memory Execution related macros */
28#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
7feb6bb8
MM		 29#define TDB_FORMAT1 1
30#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
31
78f26131
CB		 32extern debug_info_t *kvm_s390_dbf;
33#define KVM_EVENT(d_loglevel, d_string, d_args...)\
34do { \
35 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
36 d_args); \
37} while (0)
38
b0c632db
HC		 39#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
40do { \
41 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
42 d_args); \
43} while (0)
44
45#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
46do { \
47 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
48 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
49 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
50 d_args); \
51} while (0)
ba5c1e9b 52
7a42fdc2 53static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 54{
7a42fdc2 55 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
ba5c1e9b
CO		 56}
57
5ebda316
DH		 58static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
59{
94a15de8 60 return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
5ebda316
DH		 61}
62
e08b9637
CO		 63static inline int kvm_is_ucontrol(struct kvm *kvm)
64{
65#ifdef CONFIG_KVM_S390_UCONTROL
66 if (kvm->arch.gmap)
67 return 0;
68 return 1;
69#else
70 return 0;
71#endif
72}
8d26cf7b 73
fda902cb
MM		 74#define GUEST_PREFIX_SHIFT 13
75static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
76{
77 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
78}
79
8d26cf7b
CB		 80static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
81{
71db35d2
CB		 82 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
83 prefix);
fda902cb 84 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 85 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 86 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 87}
88
27f67f87 89static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 90{
0c29b229
CB		 91 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
92 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 93
8ae04b8f
AY		 94 if (ar)
95 *ar = base2;
96
b1c571a5
CH		 97 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
98}
99
100static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
8ae04b8f 101 u64 *address1, u64 *address2,
27f67f87 102 u8 *ar_b1, u8 *ar_b2)
b1c571a5 103{
0c29b229
CB		 104 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
105 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
106 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
107 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
b1c571a5
CH		 108
109 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
110 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
8ae04b8f
AY		 111
112 if (ar_b1)
113 *ar_b1 = base1;
114 if (ar_b2)
115 *ar_b2 = base2;
b1c571a5
CH		 116}
117
69d0d3a3
CB		 118static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
119{
ff7158b2
TH		 120 if (r1)
121 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
122 if (r2)
123 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 124}
125
27f67f87 126static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 127{
0c29b229
CB		 128 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
129 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 130 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 131 /* The displacement is a 20bit _SIGNED_ value */
132 if (disp2 & 0x80000)
133 disp2+=0xfff00000;
b1c571a5 134
8ae04b8f
AY		 135 if (ar)
136 *ar = base2;
137
0c29b229 138 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 139}
140
27f67f87 141static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
b1c571a5 142{
0c29b229
CB		 143 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
144 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5 145
8ae04b8f
AY		 146 if (ar)
147 *ar = base2;
148
b1c571a5
CH		 149 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
150}
151
ea828ebf
TH		 152/* Set the condition code in the guest program status word */
153static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
154{
155 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
156 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
157}
158
1e8d2424 159/* test availability of facility in a kvm instance */
9d8d5786
MM		 160static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
161{
c54f0d6a
DH		 162 return __test_facility(nr, kvm->arch.model.fac_mask) &&
163 __test_facility(nr, kvm->arch.model.fac_list);
9d8d5786
MM		 164}
165
18280d8b
MM		 166static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
167{
168 unsigned char *ptr;
169
170 if (nr >= MAX_FACILITY_BIT)
171 return -EINVAL;
172 ptr = (unsigned char *) fac_list + (nr >> 3);
173 *ptr |= (0x80UL >> (nr & 7));
174 return 0;
175}
176
15c9705f
DH		 177static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
178{
179 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
180 return test_bit_inv(nr, kvm->arch.cpu_feat);
181}
182
6352e4d2
DH		 183/* are cpu states controlled by user space */
184static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
185{
186 return kvm->arch.user_cpu_state_ctrl != 0;
187}
188
66933b78 189/* implemented in interrupt.c */
ba5c1e9b 190int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 191void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 192enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 193int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 194void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 195void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 196int __must_check kvm_s390_inject_vm(struct kvm *kvm,
197 struct kvm_s390_interrupt *s390int);
198int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
383d0b05 199 struct kvm_s390_irq *irq);
66933b78
DH		 200static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
201 struct kvm_s390_pgm_info *pgm_info)
202{
203 struct kvm_s390_irq irq = {
204 .type = KVM_S390_PROGRAM_INT,
205 .u.pgm = *pgm_info,
206 };
207
208 return kvm_s390_inject_vcpu(vcpu, &irq);
209}
210static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
211{
212 struct kvm_s390_irq irq = {
213 .type = KVM_S390_PROGRAM_INT,
214 .u.pgm.code = code,
215 };
216
217 return kvm_s390_inject_vcpu(vcpu, &irq);
218}
fa6b7fe9 219struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241 220 u64 isc_mask, u32 schid);
15462e37
DH		 221int kvm_s390_reinject_io_int(struct kvm *kvm,
222 struct kvm_s390_interrupt_info *inti);
841b91c5 223int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 224
04b41acd 225/* implemented in intercept.c */
0e8bc06a 226u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
04b41acd 227int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
0e8bc06a
DH		 228static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
229{
230 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
231
232 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
233}
234static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
235{
236 kvm_s390_rewind_psw(vcpu, -ilen);
237}
238static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
239{
5ffe466c
DH		 240 /* don't inject PER events if we re-execute the instruction */
241 vcpu->arch.sie_block->icptstatus &= ~0x02;
0e8bc06a
DH		 242 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
243}
04b41acd 244
453423dc 245/* implemented in priv.c */
a3fb577e 246int is_valid_psw(psw_t *psw);
80cd8763 247int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
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
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}
b0c632db 398#endif
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