Update version for v6.2.0-rc4 release
[qemu.git] / target / s390x / helper.c
1 /*
2 * S/390 helpers
3 *
4 * Copyright (c) 2009 Ulrich Hecht
5 * Copyright (c) 2011 Alexander Graf
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "qemu/osdep.h"
22 #include "cpu.h"
23 #include "internal.h"
24 #include "exec/gdbstub.h"
25 #include "qemu/timer.h"
26 #include "qemu/qemu-print.h"
27 #include "hw/s390x/ioinst.h"
28 #include "hw/s390x/pv.h"
29 #include "sysemu/hw_accel.h"
30 #include "sysemu/runstate.h"
31 #ifndef CONFIG_USER_ONLY
32 #include "sysemu/tcg.h"
33 #endif
34
35 #ifndef CONFIG_USER_ONLY
36 void s390x_tod_timer(void *opaque)
37 {
38 cpu_inject_clock_comparator((S390CPU *) opaque);
39 }
40
41 void s390x_cpu_timer(void *opaque)
42 {
43 cpu_inject_cpu_timer((S390CPU *) opaque);
44 }
45
46 hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr)
47 {
48 S390CPU *cpu = S390_CPU(cs);
49 CPUS390XState *env = &cpu->env;
50 target_ulong raddr;
51 int prot;
52 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
53 uint64_t tec;
54
55 /* 31-Bit mode */
56 if (!(env->psw.mask & PSW_MASK_64)) {
57 vaddr &= 0x7fffffff;
58 }
59
60 /* We want to read the code (e.g., see what we are single-stepping).*/
61 if (asc != PSW_ASC_HOME) {
62 asc = PSW_ASC_PRIMARY;
63 }
64
65 /*
66 * We want to read code even if IEP is active. Use MMU_DATA_LOAD instead
67 * of MMU_INST_FETCH.
68 */
69 if (mmu_translate(env, vaddr, MMU_DATA_LOAD, asc, &raddr, &prot, &tec)) {
70 return -1;
71 }
72 return raddr;
73 }
74
75 hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr)
76 {
77 hwaddr phys_addr;
78 target_ulong page;
79
80 page = vaddr & TARGET_PAGE_MASK;
81 phys_addr = cpu_get_phys_page_debug(cs, page);
82 phys_addr += (vaddr & ~TARGET_PAGE_MASK);
83
84 return phys_addr;
85 }
86
87 static inline bool is_special_wait_psw(uint64_t psw_addr)
88 {
89 /* signal quiesce */
90 return (psw_addr & 0xfffUL) == 0xfffUL;
91 }
92
93 void s390_handle_wait(S390CPU *cpu)
94 {
95 CPUState *cs = CPU(cpu);
96
97 if (s390_cpu_halt(cpu) == 0) {
98 if (is_special_wait_psw(cpu->env.psw.addr)) {
99 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
100 } else {
101 cpu->env.crash_reason = S390_CRASH_REASON_DISABLED_WAIT;
102 qemu_system_guest_panicked(cpu_get_crash_info(cs));
103 }
104 }
105 }
106
107 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
108 {
109 uint64_t old_mask = env->psw.mask;
110
111 env->psw.addr = addr;
112 env->psw.mask = mask;
113
114 /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
115 if (!tcg_enabled()) {
116 return;
117 }
118 env->cc_op = (mask >> 44) & 3;
119
120 if ((old_mask ^ mask) & PSW_MASK_PER) {
121 s390_cpu_recompute_watchpoints(env_cpu(env));
122 }
123
124 if (mask & PSW_MASK_WAIT) {
125 s390_handle_wait(env_archcpu(env));
126 }
127 }
128
129 uint64_t get_psw_mask(CPUS390XState *env)
130 {
131 uint64_t r = env->psw.mask;
132
133 if (tcg_enabled()) {
134 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
135 env->cc_vr);
136
137 r &= ~PSW_MASK_CC;
138 assert(!(env->cc_op & ~3));
139 r |= (uint64_t)env->cc_op << 44;
140 }
141
142 return r;
143 }
144
145 LowCore *cpu_map_lowcore(CPUS390XState *env)
146 {
147 LowCore *lowcore;
148 hwaddr len = sizeof(LowCore);
149
150 lowcore = cpu_physical_memory_map(env->psa, &len, true);
151
152 if (len < sizeof(LowCore)) {
153 cpu_abort(env_cpu(env), "Could not map lowcore\n");
154 }
155
156 return lowcore;
157 }
158
159 void cpu_unmap_lowcore(LowCore *lowcore)
160 {
161 cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore));
162 }
163
164 void do_restart_interrupt(CPUS390XState *env)
165 {
166 uint64_t mask, addr;
167 LowCore *lowcore;
168
169 lowcore = cpu_map_lowcore(env);
170
171 lowcore->restart_old_psw.mask = cpu_to_be64(get_psw_mask(env));
172 lowcore->restart_old_psw.addr = cpu_to_be64(env->psw.addr);
173 mask = be64_to_cpu(lowcore->restart_new_psw.mask);
174 addr = be64_to_cpu(lowcore->restart_new_psw.addr);
175
176 cpu_unmap_lowcore(lowcore);
177 env->pending_int &= ~INTERRUPT_RESTART;
178
179 load_psw(env, mask, addr);
180 }
181
182 void s390_cpu_recompute_watchpoints(CPUState *cs)
183 {
184 const int wp_flags = BP_CPU | BP_MEM_WRITE | BP_STOP_BEFORE_ACCESS;
185 S390CPU *cpu = S390_CPU(cs);
186 CPUS390XState *env = &cpu->env;
187
188 /* We are called when the watchpoints have changed. First
189 remove them all. */
190 cpu_watchpoint_remove_all(cs, BP_CPU);
191
192 /* Return if PER is not enabled */
193 if (!(env->psw.mask & PSW_MASK_PER)) {
194 return;
195 }
196
197 /* Return if storage-alteration event is not enabled. */
198 if (!(env->cregs[9] & PER_CR9_EVENT_STORE)) {
199 return;
200 }
201
202 if (env->cregs[10] == 0 && env->cregs[11] == -1LL) {
203 /* We can't create a watchoint spanning the whole memory range, so
204 split it in two parts. */
205 cpu_watchpoint_insert(cs, 0, 1ULL << 63, wp_flags, NULL);
206 cpu_watchpoint_insert(cs, 1ULL << 63, 1ULL << 63, wp_flags, NULL);
207 } else if (env->cregs[10] > env->cregs[11]) {
208 /* The address range loops, create two watchpoints. */
209 cpu_watchpoint_insert(cs, env->cregs[10], -env->cregs[10],
210 wp_flags, NULL);
211 cpu_watchpoint_insert(cs, 0, env->cregs[11] + 1, wp_flags, NULL);
212
213 } else {
214 /* Default case, create a single watchpoint. */
215 cpu_watchpoint_insert(cs, env->cregs[10],
216 env->cregs[11] - env->cregs[10] + 1,
217 wp_flags, NULL);
218 }
219 }
220
221 typedef struct SigpSaveArea {
222 uint64_t fprs[16]; /* 0x0000 */
223 uint64_t grs[16]; /* 0x0080 */
224 PSW psw; /* 0x0100 */
225 uint8_t pad_0x0110[0x0118 - 0x0110]; /* 0x0110 */
226 uint32_t prefix; /* 0x0118 */
227 uint32_t fpc; /* 0x011c */
228 uint8_t pad_0x0120[0x0124 - 0x0120]; /* 0x0120 */
229 uint32_t todpr; /* 0x0124 */
230 uint64_t cputm; /* 0x0128 */
231 uint64_t ckc; /* 0x0130 */
232 uint8_t pad_0x0138[0x0140 - 0x0138]; /* 0x0138 */
233 uint32_t ars[16]; /* 0x0140 */
234 uint64_t crs[16]; /* 0x0384 */
235 } SigpSaveArea;
236 QEMU_BUILD_BUG_ON(sizeof(SigpSaveArea) != 512);
237
238 int s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
239 {
240 static const uint8_t ar_id = 1;
241 SigpSaveArea *sa;
242 hwaddr len = sizeof(*sa);
243 int i;
244
245 /* For PVMs storing will occur when this cpu enters SIE again */
246 if (s390_is_pv()) {
247 return 0;
248 }
249
250 sa = cpu_physical_memory_map(addr, &len, true);
251 if (!sa) {
252 return -EFAULT;
253 }
254 if (len != sizeof(*sa)) {
255 cpu_physical_memory_unmap(sa, len, 1, 0);
256 return -EFAULT;
257 }
258
259 if (store_arch) {
260 cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1);
261 }
262 for (i = 0; i < 16; ++i) {
263 sa->fprs[i] = cpu_to_be64(*get_freg(&cpu->env, i));
264 }
265 for (i = 0; i < 16; ++i) {
266 sa->grs[i] = cpu_to_be64(cpu->env.regs[i]);
267 }
268 sa->psw.addr = cpu_to_be64(cpu->env.psw.addr);
269 sa->psw.mask = cpu_to_be64(get_psw_mask(&cpu->env));
270 sa->prefix = cpu_to_be32(cpu->env.psa);
271 sa->fpc = cpu_to_be32(cpu->env.fpc);
272 sa->todpr = cpu_to_be32(cpu->env.todpr);
273 sa->cputm = cpu_to_be64(cpu->env.cputm);
274 sa->ckc = cpu_to_be64(cpu->env.ckc >> 8);
275 for (i = 0; i < 16; ++i) {
276 sa->ars[i] = cpu_to_be32(cpu->env.aregs[i]);
277 }
278 for (i = 0; i < 16; ++i) {
279 sa->crs[i] = cpu_to_be64(cpu->env.cregs[i]);
280 }
281
282 cpu_physical_memory_unmap(sa, len, 1, len);
283
284 return 0;
285 }
286
287 typedef struct SigpAdtlSaveArea {
288 uint64_t vregs[32][2]; /* 0x0000 */
289 uint8_t pad_0x0200[0x0400 - 0x0200]; /* 0x0200 */
290 uint64_t gscb[4]; /* 0x0400 */
291 uint8_t pad_0x0420[0x1000 - 0x0420]; /* 0x0420 */
292 } SigpAdtlSaveArea;
293 QEMU_BUILD_BUG_ON(sizeof(SigpAdtlSaveArea) != 4096);
294
295 #define ADTL_GS_MIN_SIZE 2048 /* minimal size of adtl save area for GS */
296 int s390_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len)
297 {
298 SigpAdtlSaveArea *sa;
299 hwaddr save = len;
300 int i;
301
302 sa = cpu_physical_memory_map(addr, &save, true);
303 if (!sa) {
304 return -EFAULT;
305 }
306 if (save != len) {
307 cpu_physical_memory_unmap(sa, len, 1, 0);
308 return -EFAULT;
309 }
310
311 if (s390_has_feat(S390_FEAT_VECTOR)) {
312 for (i = 0; i < 32; i++) {
313 sa->vregs[i][0] = cpu_to_be64(cpu->env.vregs[i][0]);
314 sa->vregs[i][1] = cpu_to_be64(cpu->env.vregs[i][1]);
315 }
316 }
317 if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) && len >= ADTL_GS_MIN_SIZE) {
318 for (i = 0; i < 4; i++) {
319 sa->gscb[i] = cpu_to_be64(cpu->env.gscb[i]);
320 }
321 }
322
323 cpu_physical_memory_unmap(sa, len, 1, len);
324 return 0;
325 }
326 #endif /* CONFIG_USER_ONLY */
327
328 void s390_cpu_dump_state(CPUState *cs, FILE *f, int flags)
329 {
330 S390CPU *cpu = S390_CPU(cs);
331 CPUS390XState *env = &cpu->env;
332 int i;
333
334 if (env->cc_op > 3) {
335 qemu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %15s\n",
336 env->psw.mask, env->psw.addr, cc_name(env->cc_op));
337 } else {
338 qemu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %02x\n",
339 env->psw.mask, env->psw.addr, env->cc_op);
340 }
341
342 for (i = 0; i < 16; i++) {
343 qemu_fprintf(f, "R%02d=%016" PRIx64, i, env->regs[i]);
344 if ((i % 4) == 3) {
345 qemu_fprintf(f, "\n");
346 } else {
347 qemu_fprintf(f, " ");
348 }
349 }
350
351 if (flags & CPU_DUMP_FPU) {
352 if (s390_has_feat(S390_FEAT_VECTOR)) {
353 for (i = 0; i < 32; i++) {
354 qemu_fprintf(f, "V%02d=%016" PRIx64 "%016" PRIx64 "%c",
355 i, env->vregs[i][0], env->vregs[i][1],
356 i % 2 ? '\n' : ' ');
357 }
358 } else {
359 for (i = 0; i < 16; i++) {
360 qemu_fprintf(f, "F%02d=%016" PRIx64 "%c",
361 i, *get_freg(env, i),
362 (i % 4) == 3 ? '\n' : ' ');
363 }
364 }
365 }
366
367 #ifndef CONFIG_USER_ONLY
368 for (i = 0; i < 16; i++) {
369 qemu_fprintf(f, "C%02d=%016" PRIx64, i, env->cregs[i]);
370 if ((i % 4) == 3) {
371 qemu_fprintf(f, "\n");
372 } else {
373 qemu_fprintf(f, " ");
374 }
375 }
376 #endif
377
378 #ifdef DEBUG_INLINE_BRANCHES
379 for (i = 0; i < CC_OP_MAX; i++) {
380 qemu_fprintf(f, " %15s = %10ld\t%10ld\n", cc_name(i),
381 inline_branch_miss[i], inline_branch_hit[i]);
382 }
383 #endif
384
385 qemu_fprintf(f, "\n");
386 }
387
388 const char *cc_name(enum cc_op cc_op)
389 {
390 static const char * const cc_names[] = {
391 [CC_OP_CONST0] = "CC_OP_CONST0",
392 [CC_OP_CONST1] = "CC_OP_CONST1",
393 [CC_OP_CONST2] = "CC_OP_CONST2",
394 [CC_OP_CONST3] = "CC_OP_CONST3",
395 [CC_OP_DYNAMIC] = "CC_OP_DYNAMIC",
396 [CC_OP_STATIC] = "CC_OP_STATIC",
397 [CC_OP_NZ] = "CC_OP_NZ",
398 [CC_OP_ADDU] = "CC_OP_ADDU",
399 [CC_OP_SUBU] = "CC_OP_SUBU",
400 [CC_OP_LTGT_32] = "CC_OP_LTGT_32",
401 [CC_OP_LTGT_64] = "CC_OP_LTGT_64",
402 [CC_OP_LTUGTU_32] = "CC_OP_LTUGTU_32",
403 [CC_OP_LTUGTU_64] = "CC_OP_LTUGTU_64",
404 [CC_OP_LTGT0_32] = "CC_OP_LTGT0_32",
405 [CC_OP_LTGT0_64] = "CC_OP_LTGT0_64",
406 [CC_OP_ADD_64] = "CC_OP_ADD_64",
407 [CC_OP_SUB_64] = "CC_OP_SUB_64",
408 [CC_OP_ABS_64] = "CC_OP_ABS_64",
409 [CC_OP_NABS_64] = "CC_OP_NABS_64",
410 [CC_OP_ADD_32] = "CC_OP_ADD_32",
411 [CC_OP_SUB_32] = "CC_OP_SUB_32",
412 [CC_OP_ABS_32] = "CC_OP_ABS_32",
413 [CC_OP_NABS_32] = "CC_OP_NABS_32",
414 [CC_OP_COMP_32] = "CC_OP_COMP_32",
415 [CC_OP_COMP_64] = "CC_OP_COMP_64",
416 [CC_OP_TM_32] = "CC_OP_TM_32",
417 [CC_OP_TM_64] = "CC_OP_TM_64",
418 [CC_OP_NZ_F32] = "CC_OP_NZ_F32",
419 [CC_OP_NZ_F64] = "CC_OP_NZ_F64",
420 [CC_OP_NZ_F128] = "CC_OP_NZ_F128",
421 [CC_OP_ICM] = "CC_OP_ICM",
422 [CC_OP_SLA_32] = "CC_OP_SLA_32",
423 [CC_OP_SLA_64] = "CC_OP_SLA_64",
424 [CC_OP_FLOGR] = "CC_OP_FLOGR",
425 [CC_OP_LCBB] = "CC_OP_LCBB",
426 [CC_OP_VC] = "CC_OP_VC",
427 [CC_OP_MULS_32] = "CC_OP_MULS_32",
428 [CC_OP_MULS_64] = "CC_OP_MULS_64",
429 };
430
431 return cc_names[cc_op];
432 }