1 | /* |
2 | * QEMU PowerPC pSeries Logical Partition capabilities handling |
3 | * |
4 | * Copyright (c) 2017 David Gibson, Red Hat Inc. |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #include "qemu/osdep.h" |
26 | #include "qemu/error-report.h" |
27 | #include "qapi/error.h" |
28 | #include "qapi/visitor.h" |
29 | #include "sysemu/hw_accel.h" |
30 | #include "exec/ram_addr.h" |
31 | #include "target/ppc/cpu.h" |
32 | #include "target/ppc/mmu-hash64.h" |
33 | #include "cpu-models.h" |
34 | #include "kvm_ppc.h" |
35 | #include "migration/vmstate.h" |
36 | #include "sysemu/qtest.h" |
37 | #include "sysemu/tcg.h" |
38 | |
39 | #include "hw/ppc/spapr.h" |
40 | |
41 | typedef struct SpaprCapPossible { |
42 | int num; /* size of vals array below */ |
43 | const char *help; /* help text for vals */ |
44 | /* |
45 | * Note: |
46 | * - because of the way compatibility is determined vals MUST be ordered |
47 | * such that later options are a superset of all preceding options. |
48 | * - the order of vals must be preserved, that is their index is important, |
49 | * however vals may be added to the end of the list so long as the above |
50 | * point is observed |
51 | */ |
52 | const char *vals[]; |
53 | } SpaprCapPossible; |
54 | |
55 | typedef struct SpaprCapabilityInfo { |
56 | const char *name; |
57 | const char *description; |
58 | int index; |
59 | |
60 | /* Getter and Setter Function Pointers */ |
61 | ObjectPropertyAccessor *get; |
62 | ObjectPropertyAccessor *set; |
63 | const char *type; |
64 | /* Possible values if this is a custom string type */ |
65 | SpaprCapPossible *possible; |
66 | /* Make sure the virtual hardware can support this capability */ |
67 | void (*apply)(SpaprMachineState *spapr, uint8_t val, Error **errp); |
68 | void (*cpu_apply)(SpaprMachineState *spapr, PowerPCCPU *cpu, |
69 | uint8_t val, Error **errp); |
70 | bool (*migrate_needed)(void *opaque); |
71 | } SpaprCapabilityInfo; |
72 | |
73 | static void spapr_cap_get_bool(Object *obj, Visitor *v, const char *name, |
74 | void *opaque, Error **errp) |
75 | { |
76 | SpaprCapabilityInfo *cap = opaque; |
77 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
78 | bool value = spapr_get_cap(spapr, cap->index) == SPAPR_CAP_ON; |
79 | |
80 | visit_type_bool(v, name, &value, errp); |
81 | } |
82 | |
83 | static void spapr_cap_set_bool(Object *obj, Visitor *v, const char *name, |
84 | void *opaque, Error **errp) |
85 | { |
86 | SpaprCapabilityInfo *cap = opaque; |
87 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
88 | bool value; |
89 | Error *local_err = NULL; |
90 | |
91 | visit_type_bool(v, name, &value, &local_err); |
92 | if (local_err) { |
93 | error_propagate(errp, local_err); |
94 | return; |
95 | } |
96 | |
97 | spapr->cmd_line_caps[cap->index] = true; |
98 | spapr->eff.caps[cap->index] = value ? SPAPR_CAP_ON : SPAPR_CAP_OFF; |
99 | } |
100 | |
101 | |
102 | static void spapr_cap_get_string(Object *obj, Visitor *v, const char *name, |
103 | void *opaque, Error **errp) |
104 | { |
105 | SpaprCapabilityInfo *cap = opaque; |
106 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
107 | char *val = NULL; |
108 | uint8_t value = spapr_get_cap(spapr, cap->index); |
109 | |
110 | if (value >= cap->possible->num) { |
111 | error_setg(errp, "Invalid value (%d) for cap-%s" , value, cap->name); |
112 | return; |
113 | } |
114 | |
115 | val = g_strdup(cap->possible->vals[value]); |
116 | |
117 | visit_type_str(v, name, &val, errp); |
118 | g_free(val); |
119 | } |
120 | |
121 | static void spapr_cap_set_string(Object *obj, Visitor *v, const char *name, |
122 | void *opaque, Error **errp) |
123 | { |
124 | SpaprCapabilityInfo *cap = opaque; |
125 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
126 | Error *local_err = NULL; |
127 | uint8_t i; |
128 | char *val; |
129 | |
130 | visit_type_str(v, name, &val, &local_err); |
131 | if (local_err) { |
132 | error_propagate(errp, local_err); |
133 | return; |
134 | } |
135 | |
136 | if (!strcmp(val, "?" )) { |
137 | error_setg(errp, "%s" , cap->possible->help); |
138 | goto out; |
139 | } |
140 | for (i = 0; i < cap->possible->num; i++) { |
141 | if (!strcasecmp(val, cap->possible->vals[i])) { |
142 | spapr->cmd_line_caps[cap->index] = true; |
143 | spapr->eff.caps[cap->index] = i; |
144 | goto out; |
145 | } |
146 | } |
147 | |
148 | error_setg(errp, "Invalid capability mode \"%s\" for cap-%s" , val, |
149 | cap->name); |
150 | out: |
151 | g_free(val); |
152 | } |
153 | |
154 | static void spapr_cap_get_pagesize(Object *obj, Visitor *v, const char *name, |
155 | void *opaque, Error **errp) |
156 | { |
157 | SpaprCapabilityInfo *cap = opaque; |
158 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
159 | uint8_t val = spapr_get_cap(spapr, cap->index); |
160 | uint64_t pagesize = (1ULL << val); |
161 | |
162 | visit_type_size(v, name, &pagesize, errp); |
163 | } |
164 | |
165 | static void spapr_cap_set_pagesize(Object *obj, Visitor *v, const char *name, |
166 | void *opaque, Error **errp) |
167 | { |
168 | SpaprCapabilityInfo *cap = opaque; |
169 | SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
170 | uint64_t pagesize; |
171 | uint8_t val; |
172 | Error *local_err = NULL; |
173 | |
174 | visit_type_size(v, name, &pagesize, &local_err); |
175 | if (local_err) { |
176 | error_propagate(errp, local_err); |
177 | return; |
178 | } |
179 | |
180 | if (!is_power_of_2(pagesize)) { |
181 | error_setg(errp, "cap-%s must be a power of 2" , cap->name); |
182 | return; |
183 | } |
184 | |
185 | val = ctz64(pagesize); |
186 | spapr->cmd_line_caps[cap->index] = true; |
187 | spapr->eff.caps[cap->index] = val; |
188 | } |
189 | |
190 | static void cap_htm_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
191 | { |
192 | if (!val) { |
193 | /* TODO: We don't support disabling htm yet */ |
194 | return; |
195 | } |
196 | if (tcg_enabled()) { |
197 | error_setg(errp, |
198 | "No Transactional Memory support in TCG," |
199 | " try appending -machine cap-htm=off" ); |
200 | } else if (kvm_enabled() && !kvmppc_has_cap_htm()) { |
201 | error_setg(errp, |
202 | "KVM implementation does not support Transactional Memory," |
203 | " try appending -machine cap-htm=off" |
204 | ); |
205 | } |
206 | } |
207 | |
208 | static void cap_vsx_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
209 | { |
210 | PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
211 | CPUPPCState *env = &cpu->env; |
212 | |
213 | if (!val) { |
214 | /* TODO: We don't support disabling vsx yet */ |
215 | return; |
216 | } |
217 | /* Allowable CPUs in spapr_cpu_core.c should already have gotten |
218 | * rid of anything that doesn't do VMX */ |
219 | g_assert(env->insns_flags & PPC_ALTIVEC); |
220 | if (!(env->insns_flags2 & PPC2_VSX)) { |
221 | error_setg(errp, "VSX support not available," |
222 | " try appending -machine cap-vsx=off" ); |
223 | } |
224 | } |
225 | |
226 | static void cap_dfp_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
227 | { |
228 | PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
229 | CPUPPCState *env = &cpu->env; |
230 | |
231 | if (!val) { |
232 | /* TODO: We don't support disabling dfp yet */ |
233 | return; |
234 | } |
235 | if (!(env->insns_flags2 & PPC2_DFP)) { |
236 | error_setg(errp, "DFP support not available," |
237 | " try appending -machine cap-dfp=off" ); |
238 | } |
239 | } |
240 | |
241 | SpaprCapPossible cap_cfpc_possible = { |
242 | .num = 3, |
243 | .vals = {"broken" , "workaround" , "fixed" }, |
244 | .help = "broken - no protection, workaround - workaround available," |
245 | " fixed - fixed in hardware" , |
246 | }; |
247 | |
248 | static void cap_safe_cache_apply(SpaprMachineState *spapr, uint8_t val, |
249 | Error **errp) |
250 | { |
251 | Error *local_err = NULL; |
252 | uint8_t kvm_val = kvmppc_get_cap_safe_cache(); |
253 | |
254 | if (tcg_enabled() && val) { |
255 | /* TCG only supports broken, allow other values and print a warning */ |
256 | error_setg(&local_err, |
257 | "TCG doesn't support requested feature, cap-cfpc=%s" , |
258 | cap_cfpc_possible.vals[val]); |
259 | } else if (kvm_enabled() && (val > kvm_val)) { |
260 | error_setg(errp, |
261 | "Requested safe cache capability level not supported by kvm," |
262 | " try appending -machine cap-cfpc=%s" , |
263 | cap_cfpc_possible.vals[kvm_val]); |
264 | } |
265 | |
266 | if (local_err != NULL) |
267 | warn_report_err(local_err); |
268 | } |
269 | |
270 | SpaprCapPossible cap_sbbc_possible = { |
271 | .num = 3, |
272 | .vals = {"broken" , "workaround" , "fixed" }, |
273 | .help = "broken - no protection, workaround - workaround available," |
274 | " fixed - fixed in hardware" , |
275 | }; |
276 | |
277 | static void cap_safe_bounds_check_apply(SpaprMachineState *spapr, uint8_t val, |
278 | Error **errp) |
279 | { |
280 | Error *local_err = NULL; |
281 | uint8_t kvm_val = kvmppc_get_cap_safe_bounds_check(); |
282 | |
283 | if (tcg_enabled() && val) { |
284 | /* TCG only supports broken, allow other values and print a warning */ |
285 | error_setg(&local_err, |
286 | "TCG doesn't support requested feature, cap-sbbc=%s" , |
287 | cap_sbbc_possible.vals[val]); |
288 | } else if (kvm_enabled() && (val > kvm_val)) { |
289 | error_setg(errp, |
290 | "Requested safe bounds check capability level not supported by kvm," |
291 | " try appending -machine cap-sbbc=%s" , |
292 | cap_sbbc_possible.vals[kvm_val]); |
293 | } |
294 | |
295 | if (local_err != NULL) |
296 | warn_report_err(local_err); |
297 | } |
298 | |
299 | SpaprCapPossible cap_ibs_possible = { |
300 | .num = 5, |
301 | /* Note workaround only maintained for compatibility */ |
302 | .vals = {"broken" , "workaround" , "fixed-ibs" , "fixed-ccd" , "fixed-na" }, |
303 | .help = "broken - no protection, workaround - count cache flush" |
304 | ", fixed-ibs - indirect branch serialisation," |
305 | " fixed-ccd - cache count disabled," |
306 | " fixed-na - fixed in hardware (no longer applicable)" , |
307 | }; |
308 | |
309 | static void cap_safe_indirect_branch_apply(SpaprMachineState *spapr, |
310 | uint8_t val, Error **errp) |
311 | { |
312 | Error *local_err = NULL; |
313 | uint8_t kvm_val = kvmppc_get_cap_safe_indirect_branch(); |
314 | |
315 | if (tcg_enabled() && val) { |
316 | /* TCG only supports broken, allow other values and print a warning */ |
317 | error_setg(&local_err, |
318 | "TCG doesn't support requested feature, cap-ibs=%s" , |
319 | cap_ibs_possible.vals[val]); |
320 | } else if (kvm_enabled() && (val > kvm_val)) { |
321 | error_setg(errp, |
322 | "Requested safe indirect branch capability level not supported by kvm," |
323 | " try appending -machine cap-ibs=%s" , |
324 | cap_ibs_possible.vals[kvm_val]); |
325 | } |
326 | |
327 | if (local_err != NULL) { |
328 | warn_report_err(local_err); |
329 | } |
330 | } |
331 | |
332 | #define VALUE_DESC_TRISTATE " (broken, workaround, fixed)" |
333 | |
334 | void spapr_check_pagesize(SpaprMachineState *spapr, hwaddr pagesize, |
335 | Error **errp) |
336 | { |
337 | hwaddr maxpagesize = (1ULL << spapr->eff.caps[SPAPR_CAP_HPT_MAXPAGESIZE]); |
338 | |
339 | if (!kvmppc_hpt_needs_host_contiguous_pages()) { |
340 | return; |
341 | } |
342 | |
343 | if (maxpagesize > pagesize) { |
344 | error_setg(errp, |
345 | "Can't support %" HWADDR_PRIu" kiB guest pages with %" |
346 | HWADDR_PRIu" kiB host pages with this KVM implementation" , |
347 | maxpagesize >> 10, pagesize >> 10); |
348 | } |
349 | } |
350 | |
351 | static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr, |
352 | uint8_t val, Error **errp) |
353 | { |
354 | if (val < 12) { |
355 | error_setg(errp, "Require at least 4kiB hpt-max-page-size" ); |
356 | return; |
357 | } else if (val < 16) { |
358 | warn_report("Many guests require at least 64kiB hpt-max-page-size" ); |
359 | } |
360 | |
361 | spapr_check_pagesize(spapr, qemu_minrampagesize(), errp); |
362 | } |
363 | |
364 | static bool cap_hpt_maxpagesize_migrate_needed(void *opaque) |
365 | { |
366 | return !SPAPR_MACHINE_GET_CLASS(opaque)->pre_4_1_migration; |
367 | } |
368 | |
369 | static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift, |
370 | uint32_t pshift) |
371 | { |
372 | unsigned maxshift = *((unsigned *)opaque); |
373 | |
374 | assert(pshift >= seg_pshift); |
375 | |
376 | /* Don't allow the guest to use pages bigger than the configured |
377 | * maximum size */ |
378 | if (pshift > maxshift) { |
379 | return false; |
380 | } |
381 | |
382 | /* For whatever reason, KVM doesn't allow multiple pagesizes |
383 | * within a segment, *except* for the case of 16M pages in a 4k or |
384 | * 64k segment. Always exclude other cases, so that TCG and KVM |
385 | * guests see a consistent environment */ |
386 | if ((pshift != seg_pshift) && (pshift != 24)) { |
387 | return false; |
388 | } |
389 | |
390 | return true; |
391 | } |
392 | |
393 | static void cap_hpt_maxpagesize_cpu_apply(SpaprMachineState *spapr, |
394 | PowerPCCPU *cpu, |
395 | uint8_t val, Error **errp) |
396 | { |
397 | unsigned maxshift = val; |
398 | |
399 | ppc_hash64_filter_pagesizes(cpu, spapr_pagesize_cb, &maxshift); |
400 | } |
401 | |
402 | static void cap_nested_kvm_hv_apply(SpaprMachineState *spapr, |
403 | uint8_t val, Error **errp) |
404 | { |
405 | if (!val) { |
406 | /* capability disabled by default */ |
407 | return; |
408 | } |
409 | |
410 | if (tcg_enabled()) { |
411 | error_setg(errp, |
412 | "No Nested KVM-HV support in tcg," |
413 | " try appending -machine cap-nested-hv=off" ); |
414 | } else if (kvm_enabled()) { |
415 | if (!kvmppc_has_cap_nested_kvm_hv()) { |
416 | error_setg(errp, |
417 | "KVM implementation does not support Nested KVM-HV," |
418 | " try appending -machine cap-nested-hv=off" ); |
419 | } else if (kvmppc_set_cap_nested_kvm_hv(val) < 0) { |
420 | error_setg(errp, |
421 | "Error enabling cap-nested-hv with KVM, try cap-nested-hv=off" ); |
422 | } |
423 | } |
424 | } |
425 | |
426 | static void cap_large_decr_apply(SpaprMachineState *spapr, |
427 | uint8_t val, Error **errp) |
428 | { |
429 | PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
430 | PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); |
431 | |
432 | if (!val) { |
433 | return; /* Disabled by default */ |
434 | } |
435 | |
436 | if (tcg_enabled()) { |
437 | if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, |
438 | spapr->max_compat_pvr)) { |
439 | error_setg(errp, |
440 | "Large decrementer only supported on POWER9, try -cpu POWER9" ); |
441 | return; |
442 | } |
443 | } else if (kvm_enabled()) { |
444 | int kvm_nr_bits = kvmppc_get_cap_large_decr(); |
445 | |
446 | if (!kvm_nr_bits) { |
447 | error_setg(errp, |
448 | "No large decrementer support," |
449 | " try appending -machine cap-large-decr=off" ); |
450 | } else if (pcc->lrg_decr_bits != kvm_nr_bits) { |
451 | error_setg(errp, |
452 | "KVM large decrementer size (%d) differs to model (%d)," |
453 | " try appending -machine cap-large-decr=off" , |
454 | kvm_nr_bits, pcc->lrg_decr_bits); |
455 | } |
456 | } |
457 | } |
458 | |
459 | static void cap_large_decr_cpu_apply(SpaprMachineState *spapr, |
460 | PowerPCCPU *cpu, |
461 | uint8_t val, Error **errp) |
462 | { |
463 | CPUPPCState *env = &cpu->env; |
464 | target_ulong lpcr = env->spr[SPR_LPCR]; |
465 | |
466 | if (kvm_enabled()) { |
467 | if (kvmppc_enable_cap_large_decr(cpu, val)) { |
468 | error_setg(errp, |
469 | "No large decrementer support," |
470 | " try appending -machine cap-large-decr=off" ); |
471 | } |
472 | } |
473 | |
474 | if (val) { |
475 | lpcr |= LPCR_LD; |
476 | } else { |
477 | lpcr &= ~LPCR_LD; |
478 | } |
479 | ppc_store_lpcr(cpu, lpcr); |
480 | } |
481 | |
482 | static void cap_ccf_assist_apply(SpaprMachineState *spapr, uint8_t val, |
483 | Error **errp) |
484 | { |
485 | uint8_t kvm_val = kvmppc_get_cap_count_cache_flush_assist(); |
486 | |
487 | if (tcg_enabled() && val) { |
488 | /* TODO - for now only allow broken for TCG */ |
489 | error_setg(errp, |
490 | "Requested count cache flush assist capability level not supported by tcg," |
491 | " try appending -machine cap-ccf-assist=off" ); |
492 | } else if (kvm_enabled() && (val > kvm_val)) { |
493 | error_setg(errp, |
494 | "Requested count cache flush assist capability level not supported by kvm," |
495 | " try appending -machine cap-ccf-assist=off" ); |
496 | } |
497 | } |
498 | |
499 | SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = { |
500 | [SPAPR_CAP_HTM] = { |
501 | .name = "htm" , |
502 | .description = "Allow Hardware Transactional Memory (HTM)" , |
503 | .index = SPAPR_CAP_HTM, |
504 | .get = spapr_cap_get_bool, |
505 | .set = spapr_cap_set_bool, |
506 | .type = "bool" , |
507 | .apply = cap_htm_apply, |
508 | }, |
509 | [SPAPR_CAP_VSX] = { |
510 | .name = "vsx" , |
511 | .description = "Allow Vector Scalar Extensions (VSX)" , |
512 | .index = SPAPR_CAP_VSX, |
513 | .get = spapr_cap_get_bool, |
514 | .set = spapr_cap_set_bool, |
515 | .type = "bool" , |
516 | .apply = cap_vsx_apply, |
517 | }, |
518 | [SPAPR_CAP_DFP] = { |
519 | .name = "dfp" , |
520 | .description = "Allow Decimal Floating Point (DFP)" , |
521 | .index = SPAPR_CAP_DFP, |
522 | .get = spapr_cap_get_bool, |
523 | .set = spapr_cap_set_bool, |
524 | .type = "bool" , |
525 | .apply = cap_dfp_apply, |
526 | }, |
527 | [SPAPR_CAP_CFPC] = { |
528 | .name = "cfpc" , |
529 | .description = "Cache Flush on Privilege Change" VALUE_DESC_TRISTATE, |
530 | .index = SPAPR_CAP_CFPC, |
531 | .get = spapr_cap_get_string, |
532 | .set = spapr_cap_set_string, |
533 | .type = "string" , |
534 | .possible = &cap_cfpc_possible, |
535 | .apply = cap_safe_cache_apply, |
536 | }, |
537 | [SPAPR_CAP_SBBC] = { |
538 | .name = "sbbc" , |
539 | .description = "Speculation Barrier Bounds Checking" VALUE_DESC_TRISTATE, |
540 | .index = SPAPR_CAP_SBBC, |
541 | .get = spapr_cap_get_string, |
542 | .set = spapr_cap_set_string, |
543 | .type = "string" , |
544 | .possible = &cap_sbbc_possible, |
545 | .apply = cap_safe_bounds_check_apply, |
546 | }, |
547 | [SPAPR_CAP_IBS] = { |
548 | .name = "ibs" , |
549 | .description = |
550 | "Indirect Branch Speculation (broken, workaround, fixed-ibs," |
551 | "fixed-ccd, fixed-na)" , |
552 | .index = SPAPR_CAP_IBS, |
553 | .get = spapr_cap_get_string, |
554 | .set = spapr_cap_set_string, |
555 | .type = "string" , |
556 | .possible = &cap_ibs_possible, |
557 | .apply = cap_safe_indirect_branch_apply, |
558 | }, |
559 | [SPAPR_CAP_HPT_MAXPAGESIZE] = { |
560 | .name = "hpt-max-page-size" , |
561 | .description = "Maximum page size for Hash Page Table guests" , |
562 | .index = SPAPR_CAP_HPT_MAXPAGESIZE, |
563 | .get = spapr_cap_get_pagesize, |
564 | .set = spapr_cap_set_pagesize, |
565 | .type = "int" , |
566 | .apply = cap_hpt_maxpagesize_apply, |
567 | .cpu_apply = cap_hpt_maxpagesize_cpu_apply, |
568 | .migrate_needed = cap_hpt_maxpagesize_migrate_needed, |
569 | }, |
570 | [SPAPR_CAP_NESTED_KVM_HV] = { |
571 | .name = "nested-hv" , |
572 | .description = "Allow Nested KVM-HV" , |
573 | .index = SPAPR_CAP_NESTED_KVM_HV, |
574 | .get = spapr_cap_get_bool, |
575 | .set = spapr_cap_set_bool, |
576 | .type = "bool" , |
577 | .apply = cap_nested_kvm_hv_apply, |
578 | }, |
579 | [SPAPR_CAP_LARGE_DECREMENTER] = { |
580 | .name = "large-decr" , |
581 | .description = "Allow Large Decrementer" , |
582 | .index = SPAPR_CAP_LARGE_DECREMENTER, |
583 | .get = spapr_cap_get_bool, |
584 | .set = spapr_cap_set_bool, |
585 | .type = "bool" , |
586 | .apply = cap_large_decr_apply, |
587 | .cpu_apply = cap_large_decr_cpu_apply, |
588 | }, |
589 | [SPAPR_CAP_CCF_ASSIST] = { |
590 | .name = "ccf-assist" , |
591 | .description = "Count Cache Flush Assist via HW Instruction" , |
592 | .index = SPAPR_CAP_CCF_ASSIST, |
593 | .get = spapr_cap_get_bool, |
594 | .set = spapr_cap_set_bool, |
595 | .type = "bool" , |
596 | .apply = cap_ccf_assist_apply, |
597 | }, |
598 | }; |
599 | |
600 | static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr, |
601 | const char *cputype) |
602 | { |
603 | SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); |
604 | SpaprCapabilities caps; |
605 | |
606 | caps = smc->default_caps; |
607 | |
608 | if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00, |
609 | 0, spapr->max_compat_pvr)) { |
610 | caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; |
611 | } |
612 | |
613 | if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, |
614 | 0, spapr->max_compat_pvr)) { |
615 | caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; |
616 | caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; |
617 | } |
618 | |
619 | if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, |
620 | 0, spapr->max_compat_pvr)) { |
621 | caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; |
622 | } |
623 | |
624 | if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, |
625 | 0, spapr->max_compat_pvr)) { |
626 | caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; |
627 | caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; |
628 | caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; |
629 | } |
630 | |
631 | /* This is for pseries-2.12 and older */ |
632 | if (smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] == 0) { |
633 | uint8_t mps; |
634 | |
635 | if (kvmppc_hpt_needs_host_contiguous_pages()) { |
636 | mps = ctz64(qemu_minrampagesize()); |
637 | } else { |
638 | mps = 34; /* allow everything up to 16GiB, i.e. everything */ |
639 | } |
640 | |
641 | caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = mps; |
642 | } |
643 | |
644 | return caps; |
645 | } |
646 | |
647 | int spapr_caps_pre_load(void *opaque) |
648 | { |
649 | SpaprMachineState *spapr = opaque; |
650 | |
651 | /* Set to default so we can tell if this came in with the migration */ |
652 | spapr->mig = spapr->def; |
653 | return 0; |
654 | } |
655 | |
656 | int spapr_caps_pre_save(void *opaque) |
657 | { |
658 | SpaprMachineState *spapr = opaque; |
659 | |
660 | spapr->mig = spapr->eff; |
661 | return 0; |
662 | } |
663 | |
664 | /* This has to be called from the top-level spapr post_load, not the |
665 | * caps specific one. Otherwise it wouldn't be called when the source |
666 | * caps are all defaults, which could still conflict with overridden |
667 | * caps on the destination */ |
668 | int spapr_caps_post_migration(SpaprMachineState *spapr) |
669 | { |
670 | int i; |
671 | bool ok = true; |
672 | SpaprCapabilities dstcaps = spapr->eff; |
673 | SpaprCapabilities srccaps; |
674 | |
675 | srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); |
676 | for (i = 0; i < SPAPR_CAP_NUM; i++) { |
677 | /* If not default value then assume came in with the migration */ |
678 | if (spapr->mig.caps[i] != spapr->def.caps[i]) { |
679 | srccaps.caps[i] = spapr->mig.caps[i]; |
680 | } |
681 | } |
682 | |
683 | for (i = 0; i < SPAPR_CAP_NUM; i++) { |
684 | SpaprCapabilityInfo *info = &capability_table[i]; |
685 | |
686 | if (srccaps.caps[i] > dstcaps.caps[i]) { |
687 | error_report("cap-%s higher level (%d) in incoming stream than on destination (%d)" , |
688 | info->name, srccaps.caps[i], dstcaps.caps[i]); |
689 | ok = false; |
690 | } |
691 | |
692 | if (srccaps.caps[i] < dstcaps.caps[i]) { |
693 | warn_report("cap-%s lower level (%d) in incoming stream than on destination (%d)" , |
694 | info->name, srccaps.caps[i], dstcaps.caps[i]); |
695 | } |
696 | } |
697 | |
698 | return ok ? 0 : -EINVAL; |
699 | } |
700 | |
701 | /* Used to generate the migration field and needed function for a spapr cap */ |
702 | #define SPAPR_CAP_MIG_STATE(sname, cap) \ |
703 | static bool spapr_cap_##sname##_needed(void *opaque) \ |
704 | { \ |
705 | SpaprMachineState *spapr = opaque; \ |
706 | bool (*needed)(void *opaque) = \ |
707 | capability_table[cap].migrate_needed; \ |
708 | \ |
709 | return needed ? needed(opaque) : true && \ |
710 | spapr->cmd_line_caps[cap] && \ |
711 | (spapr->eff.caps[cap] != \ |
712 | spapr->def.caps[cap]); \ |
713 | } \ |
714 | \ |
715 | const VMStateDescription vmstate_spapr_cap_##sname = { \ |
716 | .name = "spapr/cap/" #sname, \ |
717 | .version_id = 1, \ |
718 | .minimum_version_id = 1, \ |
719 | .needed = spapr_cap_##sname##_needed, \ |
720 | .fields = (VMStateField[]) { \ |
721 | VMSTATE_UINT8(mig.caps[cap], \ |
722 | SpaprMachineState), \ |
723 | VMSTATE_END_OF_LIST() \ |
724 | }, \ |
725 | } |
726 | |
727 | SPAPR_CAP_MIG_STATE(htm, SPAPR_CAP_HTM); |
728 | SPAPR_CAP_MIG_STATE(vsx, SPAPR_CAP_VSX); |
729 | SPAPR_CAP_MIG_STATE(dfp, SPAPR_CAP_DFP); |
730 | SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC); |
731 | SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); |
732 | SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); |
733 | SPAPR_CAP_MIG_STATE(hpt_maxpagesize, SPAPR_CAP_HPT_MAXPAGESIZE); |
734 | SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); |
735 | SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER); |
736 | SPAPR_CAP_MIG_STATE(ccf_assist, SPAPR_CAP_CCF_ASSIST); |
737 | |
738 | void spapr_caps_init(SpaprMachineState *spapr) |
739 | { |
740 | SpaprCapabilities default_caps; |
741 | int i; |
742 | |
743 | /* Compute the actual set of caps we should run with */ |
744 | default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); |
745 | |
746 | for (i = 0; i < SPAPR_CAP_NUM; i++) { |
747 | /* Store the defaults */ |
748 | spapr->def.caps[i] = default_caps.caps[i]; |
749 | /* If not set on the command line then apply the default value */ |
750 | if (!spapr->cmd_line_caps[i]) { |
751 | spapr->eff.caps[i] = default_caps.caps[i]; |
752 | } |
753 | } |
754 | } |
755 | |
756 | void spapr_caps_apply(SpaprMachineState *spapr) |
757 | { |
758 | int i; |
759 | |
760 | for (i = 0; i < SPAPR_CAP_NUM; i++) { |
761 | SpaprCapabilityInfo *info = &capability_table[i]; |
762 | |
763 | /* |
764 | * If the apply function can't set the desired level and thinks it's |
765 | * fatal, it should cause that. |
766 | */ |
767 | info->apply(spapr, spapr->eff.caps[i], &error_fatal); |
768 | } |
769 | } |
770 | |
771 | void spapr_caps_cpu_apply(SpaprMachineState *spapr, PowerPCCPU *cpu) |
772 | { |
773 | int i; |
774 | |
775 | for (i = 0; i < SPAPR_CAP_NUM; i++) { |
776 | SpaprCapabilityInfo *info = &capability_table[i]; |
777 | |
778 | /* |
779 | * If the apply function can't set the desired level and thinks it's |
780 | * fatal, it should cause that. |
781 | */ |
782 | if (info->cpu_apply) { |
783 | info->cpu_apply(spapr, cpu, spapr->eff.caps[i], &error_fatal); |
784 | } |
785 | } |
786 | } |
787 | |
788 | void spapr_caps_add_properties(SpaprMachineClass *smc, Error **errp) |
789 | { |
790 | Error *local_err = NULL; |
791 | ObjectClass *klass = OBJECT_CLASS(smc); |
792 | int i; |
793 | |
794 | for (i = 0; i < ARRAY_SIZE(capability_table); i++) { |
795 | SpaprCapabilityInfo *cap = &capability_table[i]; |
796 | char *name = g_strdup_printf("cap-%s" , cap->name); |
797 | char *desc; |
798 | |
799 | object_class_property_add(klass, name, cap->type, |
800 | cap->get, cap->set, |
801 | NULL, cap, &local_err); |
802 | if (local_err) { |
803 | error_propagate(errp, local_err); |
804 | g_free(name); |
805 | return; |
806 | } |
807 | |
808 | desc = g_strdup_printf("%s" , cap->description); |
809 | object_class_property_set_description(klass, name, desc, &local_err); |
810 | g_free(name); |
811 | g_free(desc); |
812 | if (local_err) { |
813 | error_propagate(errp, local_err); |
814 | return; |
815 | } |
816 | } |
817 | } |
818 | |