aboutsummaryrefslogtreecommitdiff
path: root/target-s390x/misc_helper.c
blob: 0b625826efcdbd06380ed472a076fef63db4e717 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
/*
 *  S/390 misc helper routines
 *
 *  Copyright (c) 2009 Ulrich Hecht
 *  Copyright (c) 2009 Alexander Graf
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "cpu.h"
#include "exec/memory.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
#include <string.h>
#include "sysemu/kvm.h"
#include "qemu/timer.h"
#ifdef CONFIG_KVM
#include <linux/kvm.h>
#endif
#include "exec/cpu_ldst.h"

#if !defined(CONFIG_USER_ONLY)
#include "sysemu/cpus.h"
#include "sysemu/sysemu.h"
#include "hw/s390x/ebcdic.h"
#endif

/* #define DEBUG_HELPER */
#ifdef DEBUG_HELPER
#define HELPER_LOG(x...) qemu_log(x)
#else
#define HELPER_LOG(x...)
#endif

/* Raise an exception dynamically from a helper function.  */
void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp,
                                     uintptr_t retaddr)
{
    CPUState *cs = CPU(s390_env_get_cpu(env));
    int t;

    cs->exception_index = EXCP_PGM;
    env->int_pgm_code = excp;

    /* Use the (ultimate) callers address to find the insn that trapped.  */
    cpu_restore_state(cs, retaddr);

    /* Advance past the insn.  */
    t = cpu_ldub_code(env, env->psw.addr);
    env->int_pgm_ilen = t = get_ilen(t);
    env->psw.addr += 2 * t;

    cpu_loop_exit(cs);
}

/* Raise an exception statically from a TB.  */
void HELPER(exception)(CPUS390XState *env, uint32_t excp)
{
    CPUState *cs = CPU(s390_env_get_cpu(env));

    HELPER_LOG("%s: exception %d\n", __func__, excp);
    cs->exception_index = excp;
    cpu_loop_exit(cs);
}

#ifndef CONFIG_USER_ONLY

void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
{
    S390CPU *cpu = s390_env_get_cpu(env);

    qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
                  env->psw.addr);

    if (kvm_enabled()) {
#ifdef CONFIG_KVM
        struct kvm_s390_irq irq = {
            .type = KVM_S390_PROGRAM_INT,
            .u.pgm.code = code,
        };

        kvm_s390_vcpu_interrupt(cpu, &irq);
#endif
    } else {
        CPUState *cs = CPU(cpu);

        env->int_pgm_code = code;
        env->int_pgm_ilen = ilen;
        cs->exception_index = EXCP_PGM;
        cpu_loop_exit(cs);
    }
}

/* SCLP service call */
uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
{
    int r = sclp_service_call(env, r1, r2);
    if (r < 0) {
        program_interrupt(env, -r, 4);
        return 0;
    }
    return r;
}

#ifndef CONFIG_USER_ONLY
static void cpu_reset_all(void)
{
    CPUState *cs;
    S390CPUClass *scc;

    CPU_FOREACH(cs) {
        scc = S390_CPU_GET_CLASS(cs);
        scc->cpu_reset(cs);
    }
}

static void cpu_full_reset_all(void)
{
    CPUState *cpu;

    CPU_FOREACH(cpu) {
        cpu_reset(cpu);
    }
}

static int modified_clear_reset(S390CPU *cpu)
{
    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);

    pause_all_vcpus();
    cpu_synchronize_all_states();
    cpu_full_reset_all();
    cmma_reset(cpu);
    io_subsystem_reset();
    scc->load_normal(CPU(cpu));
    cpu_synchronize_all_post_reset();
    resume_all_vcpus();
    return 0;
}

static int load_normal_reset(S390CPU *cpu)
{
    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);

    pause_all_vcpus();
    cpu_synchronize_all_states();
    cpu_reset_all();
    cmma_reset(cpu);
    io_subsystem_reset();
    scc->initial_cpu_reset(CPU(cpu));
    scc->load_normal(CPU(cpu));
    cpu_synchronize_all_post_reset();
    resume_all_vcpus();
    return 0;
}

#define DIAG_308_RC_NO_CONF         0x0102
#define DIAG_308_RC_INVALID         0x0402
void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
{
    uint64_t addr =  env->regs[r1];
    uint64_t subcode = env->regs[r3];

    if (env->psw.mask & PSW_MASK_PSTATE) {
        program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC);
        return;
    }

    if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
        program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
        return;
    }

    switch (subcode) {
    case 0:
        modified_clear_reset(s390_env_get_cpu(env));
        break;
    case 1:
        load_normal_reset(s390_env_get_cpu(env));
        break;
    case 5:
        if ((r1 & 1) || (addr & 0x0fffULL)) {
            program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
            return;
        }
        env->regs[r1+1] = DIAG_308_RC_INVALID;
        return;
    case 6:
        if ((r1 & 1) || (addr & 0x0fffULL)) {
            program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
            return;
        }
        env->regs[r1+1] = DIAG_308_RC_NO_CONF;
        return;
    default:
        hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
        break;
    }
}
#endif

/* DIAG */
uint64_t HELPER(diag)(CPUS390XState *env, uint32_t num, uint64_t mem,
                      uint64_t code)
{
    uint64_t r;

    switch (num) {
    case 0x500:
        /* KVM hypercall */
        r = s390_virtio_hypercall(env);
        break;
    case 0x44:
        /* yield */
        r = 0;
        break;
    case 0x308:
        /* ipl */
        r = 0;
        break;
    default:
        r = -1;
        break;
    }

    if (r) {
        program_interrupt(env, PGM_OPERATION, ILEN_LATER_INC);
    }

    return r;
}

/* Set Prefix */
void HELPER(spx)(CPUS390XState *env, uint64_t a1)
{
    CPUState *cs = CPU(s390_env_get_cpu(env));
    uint32_t prefix = a1 & 0x7fffe000;

    env->psa = prefix;
    qemu_log("prefix: %#x\n", prefix);
    tlb_flush_page(cs, 0);
    tlb_flush_page(cs, TARGET_PAGE_SIZE);
}

static inline uint64_t clock_value(CPUS390XState *env)
{
    uint64_t time;

    time = env->tod_offset +
        time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime);

    return time;
}

/* Store Clock */
uint64_t HELPER(stck)(CPUS390XState *env)
{
    return clock_value(env);
}

/* Set Clock Comparator */
void HELPER(sckc)(CPUS390XState *env, uint64_t time)
{
    if (time == -1ULL) {
        return;
    }

    /* difference between now and then */
    time -= clock_value(env);
    /* nanoseconds */
    time = (time * 125) >> 9;

    timer_mod(env->tod_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
}

/* Store Clock Comparator */
uint64_t HELPER(stckc)(CPUS390XState *env)
{
    /* XXX implement */
    return 0;
}

/* Set CPU Timer */
void HELPER(spt)(CPUS390XState *env, uint64_t time)
{
    if (time == -1ULL) {
        return;
    }

    /* nanoseconds */
    time = (time * 125) >> 9;

    timer_mod(env->cpu_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
}

/* Store CPU Timer */
uint64_t HELPER(stpt)(CPUS390XState *env)
{
    /* XXX implement */
    return 0;
}

/* Store System Information */
uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0,
                      uint64_t r0, uint64_t r1)
{
    int cc = 0;
    int sel1, sel2;

    if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 &&
        ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) {
        /* valid function code, invalid reserved bits */
        program_interrupt(env, PGM_SPECIFICATION, 2);
    }

    sel1 = r0 & STSI_R0_SEL1_MASK;
    sel2 = r1 & STSI_R1_SEL2_MASK;

    /* XXX: spec exception if sysib is not 4k-aligned */

    switch (r0 & STSI_LEVEL_MASK) {
    case STSI_LEVEL_1:
        if ((sel1 == 1) && (sel2 == 1)) {
            /* Basic Machine Configuration */
            struct sysib_111 sysib;

            memset(&sysib, 0, sizeof(sysib));
            ebcdic_put(sysib.manuf, "QEMU            ", 16);
            /* same as machine type number in STORE CPU ID */
            ebcdic_put(sysib.type, "QEMU", 4);
            /* same as model number in STORE CPU ID */
            ebcdic_put(sysib.model, "QEMU            ", 16);
            ebcdic_put(sysib.sequence, "QEMU            ", 16);
            ebcdic_put(sysib.plant, "QEMU", 4);
            cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
        } else if ((sel1 == 2) && (sel2 == 1)) {
            /* Basic Machine CPU */
            struct sysib_121 sysib;

            memset(&sysib, 0, sizeof(sysib));
            /* XXX make different for different CPUs? */
            ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
            ebcdic_put(sysib.plant, "QEMU", 4);
            stw_p(&sysib.cpu_addr, env->cpu_num);
            cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
        } else if ((sel1 == 2) && (sel2 == 2)) {
            /* Basic Machine CPUs */
            struct sysib_122 sysib;

            memset(&sysib, 0, sizeof(sysib));
            stl_p(&sysib.capability, 0x443afc29);
            /* XXX change when SMP comes */
            stw_p(&sysib.total_cpus, 1);
            stw_p(&sysib.active_cpus, 1);
            stw_p(&sysib.standby_cpus, 0);
            stw_p(&sysib.reserved_cpus, 0);
            cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
        } else {
            cc = 3;
        }
        break;
    case STSI_LEVEL_2:
        {
            if ((sel1 == 2) && (sel2 == 1)) {
                /* LPAR CPU */
                struct sysib_221 sysib;

                memset(&sysib, 0, sizeof(sysib));
                /* XXX make different for different CPUs? */
                ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
                ebcdic_put(sysib.plant, "QEMU", 4);
                stw_p(&sysib.cpu_addr, env->cpu_num);
                stw_p(&sysib.cpu_id, 0);
                cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
            } else if ((sel1 == 2) && (sel2 == 2)) {
                /* LPAR CPUs */
                struct sysib_222 sysib;

                memset(&sysib, 0, sizeof(sysib));
                stw_p(&sysib.lpar_num, 0);
                sysib.lcpuc = 0;
                /* XXX change when SMP comes */
                stw_p(&sysib.total_cpus, 1);
                stw_p(&sysib.conf_cpus, 1);
                stw_p(&sysib.standby_cpus, 0);
                stw_p(&sysib.reserved_cpus, 0);
                ebcdic_put(sysib.name, "QEMU    ", 8);
                stl_p(&sysib.caf, 1000);
                stw_p(&sysib.dedicated_cpus, 0);
                stw_p(&sysib.shared_cpus, 0);
                cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
            } else {
                cc = 3;
            }
            break;
        }
    case STSI_LEVEL_3:
        {
            if ((sel1 == 2) && (sel2 == 2)) {
                /* VM CPUs */
                struct sysib_322 sysib;

                memset(&sysib, 0, sizeof(sysib));
                sysib.count = 1;
                /* XXX change when SMP comes */
                stw_p(&sysib.vm[0].total_cpus, 1);
                stw_p(&sysib.vm[0].conf_cpus, 1);
                stw_p(&sysib.vm[0].standby_cpus, 0);
                stw_p(&sysib.vm[0].reserved_cpus, 0);
                ebcdic_put(sysib.vm[0].name, "KVMguest", 8);
                stl_p(&sysib.vm[0].caf, 1000);
                ebcdic_put(sysib.vm[0].cpi, "KVM/Linux       ", 16);
                cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
            } else {
                cc = 3;
            }
            break;
        }
    case STSI_LEVEL_CURRENT:
        env->regs[0] = STSI_LEVEL_3;
        break;
    default:
        cc = 3;
        break;
    }

    return cc;
}

uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
                      uint64_t cpu_addr)
{
    int cc = 0;

    HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n",
               __func__, order_code, r1, cpu_addr);

    /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
       as parameter (input). Status (output) is always R1. */

    switch (order_code) {
    case SIGP_SET_ARCH:
        /* switch arch */
        break;
    case SIGP_SENSE:
        /* enumerate CPU status */
        if (cpu_addr) {
            /* XXX implement when SMP comes */
            return 3;
        }
        env->regs[r1] &= 0xffffffff00000000ULL;
        cc = 1;
        break;
#if !defined(CONFIG_USER_ONLY)
    case SIGP_RESTART:
        qemu_system_reset_request();
        cpu_loop_exit(CPU(s390_env_get_cpu(env)));
        break;
    case SIGP_STOP:
        qemu_system_shutdown_request();
        cpu_loop_exit(CPU(s390_env_get_cpu(env)));
        break;
#endif
    default:
        /* unknown sigp */
        fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);
        cc = 3;
    }

    return cc;
}
#endif