lpar.c revision b0d436c739b0d4afcdfe2e97d4d1ee41ea2db62e
1/* 2 * pSeries_lpar.c 3 * Copyright (C) 2001 Todd Inglett, IBM Corporation 4 * 5 * pSeries LPAR support. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program 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 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22/* Enables debugging of low-level hash table routines - careful! */ 23#undef DEBUG 24 25#include <linux/kernel.h> 26#include <linux/dma-mapping.h> 27#include <linux/console.h> 28#include <linux/export.h> 29#include <asm/processor.h> 30#include <asm/mmu.h> 31#include <asm/page.h> 32#include <asm/pgtable.h> 33#include <asm/machdep.h> 34#include <asm/mmu_context.h> 35#include <asm/iommu.h> 36#include <asm/tlbflush.h> 37#include <asm/tlb.h> 38#include <asm/prom.h> 39#include <asm/cputable.h> 40#include <asm/udbg.h> 41#include <asm/smp.h> 42#include <asm/trace.h> 43#include <asm/firmware.h> 44 45#include "plpar_wrappers.h" 46#include "pseries.h" 47 48/* Flag bits for H_BULK_REMOVE */ 49#define HBR_REQUEST 0x4000000000000000UL 50#define HBR_RESPONSE 0x8000000000000000UL 51#define HBR_END 0xc000000000000000UL 52#define HBR_AVPN 0x0200000000000000UL 53#define HBR_ANDCOND 0x0100000000000000UL 54 55 56/* in hvCall.S */ 57EXPORT_SYMBOL(plpar_hcall); 58EXPORT_SYMBOL(plpar_hcall9); 59EXPORT_SYMBOL(plpar_hcall_norets); 60 61extern void pSeries_find_serial_port(void); 62 63void vpa_init(int cpu) 64{ 65 int hwcpu = get_hard_smp_processor_id(cpu); 66 unsigned long addr; 67 long ret; 68 struct paca_struct *pp; 69 struct dtl_entry *dtl; 70 71 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 72 lppaca_of(cpu).vmxregs_in_use = 1; 73 74 if (cpu_has_feature(CPU_FTR_ARCH_207S)) 75 lppaca_of(cpu).ebb_regs_in_use = 1; 76 77 addr = __pa(&lppaca_of(cpu)); 78 ret = register_vpa(hwcpu, addr); 79 80 if (ret) { 81 pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " 82 "%lx failed with %ld\n", cpu, hwcpu, addr, ret); 83 return; 84 } 85 /* 86 * PAPR says this feature is SLB-Buffer but firmware never 87 * reports that. All SPLPAR support SLB shadow buffer. 88 */ 89 addr = __pa(&slb_shadow[cpu]); 90 if (firmware_has_feature(FW_FEATURE_SPLPAR)) { 91 ret = register_slb_shadow(hwcpu, addr); 92 if (ret) 93 pr_err("WARNING: SLB shadow buffer registration for " 94 "cpu %d (hw %d) of area %lx failed with %ld\n", 95 cpu, hwcpu, addr, ret); 96 } 97 98 /* 99 * Register dispatch trace log, if one has been allocated. 100 */ 101 pp = &paca[cpu]; 102 dtl = pp->dispatch_log; 103 if (dtl) { 104 pp->dtl_ridx = 0; 105 pp->dtl_curr = dtl; 106 lppaca_of(cpu).dtl_idx = 0; 107 108 /* hypervisor reads buffer length from this field */ 109 dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES; 110 ret = register_dtl(hwcpu, __pa(dtl)); 111 if (ret) 112 pr_err("WARNING: DTL registration of cpu %d (hw %d) " 113 "failed with %ld\n", smp_processor_id(), 114 hwcpu, ret); 115 lppaca_of(cpu).dtl_enable_mask = 2; 116 } 117} 118 119static long pSeries_lpar_hpte_insert(unsigned long hpte_group, 120 unsigned long vpn, unsigned long pa, 121 unsigned long rflags, unsigned long vflags, 122 int psize, int apsize, int ssize) 123{ 124 unsigned long lpar_rc; 125 unsigned long flags; 126 unsigned long slot; 127 unsigned long hpte_v, hpte_r; 128 129 if (!(vflags & HPTE_V_BOLTED)) 130 pr_devel("hpte_insert(group=%lx, vpn=%016lx, " 131 "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", 132 hpte_group, vpn, pa, rflags, vflags, psize); 133 134 hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; 135 hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; 136 137 if (!(vflags & HPTE_V_BOLTED)) 138 pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); 139 140 /* Now fill in the actual HPTE */ 141 /* Set CEC cookie to 0 */ 142 /* Zero page = 0 */ 143 /* I-cache Invalidate = 0 */ 144 /* I-cache synchronize = 0 */ 145 /* Exact = 0 */ 146 flags = 0; 147 148 /* Make pHyp happy */ 149 if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU)) 150 hpte_r &= ~_PAGE_COHERENT; 151 if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) 152 flags |= H_COALESCE_CAND; 153 154 lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); 155 if (unlikely(lpar_rc == H_PTEG_FULL)) { 156 if (!(vflags & HPTE_V_BOLTED)) 157 pr_devel(" full\n"); 158 return -1; 159 } 160 161 /* 162 * Since we try and ioremap PHBs we don't own, the pte insert 163 * will fail. However we must catch the failure in hash_page 164 * or we will loop forever, so return -2 in this case. 165 */ 166 if (unlikely(lpar_rc != H_SUCCESS)) { 167 if (!(vflags & HPTE_V_BOLTED)) 168 pr_devel(" lpar err %ld\n", lpar_rc); 169 return -2; 170 } 171 if (!(vflags & HPTE_V_BOLTED)) 172 pr_devel(" -> slot: %lu\n", slot & 7); 173 174 /* Because of iSeries, we have to pass down the secondary 175 * bucket bit here as well 176 */ 177 return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); 178} 179 180static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); 181 182static long pSeries_lpar_hpte_remove(unsigned long hpte_group) 183{ 184 unsigned long slot_offset; 185 unsigned long lpar_rc; 186 int i; 187 unsigned long dummy1, dummy2; 188 189 /* pick a random slot to start at */ 190 slot_offset = mftb() & 0x7; 191 192 for (i = 0; i < HPTES_PER_GROUP; i++) { 193 194 /* don't remove a bolted entry */ 195 lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, 196 (0x1UL << 4), &dummy1, &dummy2); 197 if (lpar_rc == H_SUCCESS) 198 return i; 199 200 /* 201 * The test for adjunct partition is performed before the 202 * ANDCOND test. H_RESOURCE may be returned, so we need to 203 * check for that as well. 204 */ 205 BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); 206 207 slot_offset++; 208 slot_offset &= 0x7; 209 } 210 211 return -1; 212} 213 214static void pSeries_lpar_hptab_clear(void) 215{ 216 unsigned long size_bytes = 1UL << ppc64_pft_size; 217 unsigned long hpte_count = size_bytes >> 4; 218 struct { 219 unsigned long pteh; 220 unsigned long ptel; 221 } ptes[4]; 222 long lpar_rc; 223 unsigned long i, j; 224 225 /* Read in batches of 4, 226 * invalidate only valid entries not in the VRMA 227 * hpte_count will be a multiple of 4 228 */ 229 for (i = 0; i < hpte_count; i += 4) { 230 lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); 231 if (lpar_rc != H_SUCCESS) 232 continue; 233 for (j = 0; j < 4; j++){ 234 if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == 235 HPTE_V_VRMA_MASK) 236 continue; 237 if (ptes[j].pteh & HPTE_V_VALID) 238 plpar_pte_remove_raw(0, i + j, 0, 239 &(ptes[j].pteh), &(ptes[j].ptel)); 240 } 241 } 242} 243 244/* 245 * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and 246 * the low 3 bits of flags happen to line up. So no transform is needed. 247 * We can probably optimize here and assume the high bits of newpp are 248 * already zero. For now I am paranoid. 249 */ 250static long pSeries_lpar_hpte_updatepp(unsigned long slot, 251 unsigned long newpp, 252 unsigned long vpn, 253 int psize, int apsize, 254 int ssize, int local) 255{ 256 unsigned long lpar_rc; 257 unsigned long flags = (newpp & 7) | H_AVPN; 258 unsigned long want_v; 259 260 want_v = hpte_encode_avpn(vpn, psize, ssize); 261 262 pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", 263 want_v, slot, flags, psize); 264 265 lpar_rc = plpar_pte_protect(flags, slot, want_v); 266 267 if (lpar_rc == H_NOT_FOUND) { 268 pr_devel("not found !\n"); 269 return -1; 270 } 271 272 pr_devel("ok\n"); 273 274 BUG_ON(lpar_rc != H_SUCCESS); 275 276 return 0; 277} 278 279static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) 280{ 281 unsigned long dword0; 282 unsigned long lpar_rc; 283 unsigned long dummy_word1; 284 unsigned long flags; 285 286 /* Read 1 pte at a time */ 287 /* Do not need RPN to logical page translation */ 288 /* No cross CEC PFT access */ 289 flags = 0; 290 291 lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); 292 293 BUG_ON(lpar_rc != H_SUCCESS); 294 295 return dword0; 296} 297 298static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) 299{ 300 unsigned long hash; 301 unsigned long i; 302 long slot; 303 unsigned long want_v, hpte_v; 304 305 hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); 306 want_v = hpte_encode_avpn(vpn, psize, ssize); 307 308 /* Bolted entries are always in the primary group */ 309 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; 310 for (i = 0; i < HPTES_PER_GROUP; i++) { 311 hpte_v = pSeries_lpar_hpte_getword0(slot); 312 313 if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) 314 /* HPTE matches */ 315 return slot; 316 ++slot; 317 } 318 319 return -1; 320} 321 322static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, 323 unsigned long ea, 324 int psize, int ssize) 325{ 326 unsigned long vpn; 327 unsigned long lpar_rc, slot, vsid, flags; 328 329 vsid = get_kernel_vsid(ea, ssize); 330 vpn = hpt_vpn(ea, vsid, ssize); 331 332 slot = pSeries_lpar_hpte_find(vpn, psize, ssize); 333 BUG_ON(slot == -1); 334 335 flags = newpp & 7; 336 lpar_rc = plpar_pte_protect(flags, slot, 0); 337 338 BUG_ON(lpar_rc != H_SUCCESS); 339} 340 341static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, 342 int psize, int apsize, 343 int ssize, int local) 344{ 345 unsigned long want_v; 346 unsigned long lpar_rc; 347 unsigned long dummy1, dummy2; 348 349 pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", 350 slot, vpn, psize, local); 351 352 want_v = hpte_encode_avpn(vpn, psize, ssize); 353 lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); 354 if (lpar_rc == H_NOT_FOUND) 355 return; 356 357 BUG_ON(lpar_rc != H_SUCCESS); 358} 359 360/* 361 * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need 362 * to make sure that we avoid bouncing the hypervisor tlbie lock. 363 */ 364#define PPC64_HUGE_HPTE_BATCH 12 365 366static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, 367 unsigned long *vpn, int count, 368 int psize, int ssize) 369{ 370 unsigned long param[8]; 371 int i = 0, pix = 0, rc; 372 unsigned long flags = 0; 373 int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); 374 375 if (lock_tlbie) 376 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); 377 378 for (i = 0; i < count; i++) { 379 380 if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { 381 pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, 382 ssize, 0); 383 } else { 384 param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; 385 param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); 386 pix += 2; 387 if (pix == 8) { 388 rc = plpar_hcall9(H_BULK_REMOVE, param, 389 param[0], param[1], param[2], 390 param[3], param[4], param[5], 391 param[6], param[7]); 392 BUG_ON(rc != H_SUCCESS); 393 pix = 0; 394 } 395 } 396 } 397 if (pix) { 398 param[pix] = HBR_END; 399 rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], 400 param[2], param[3], param[4], param[5], 401 param[6], param[7]); 402 BUG_ON(rc != H_SUCCESS); 403 } 404 405 if (lock_tlbie) 406 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); 407} 408 409static void pSeries_lpar_hugepage_invalidate(struct mm_struct *mm, 410 unsigned char *hpte_slot_array, 411 unsigned long addr, int psize) 412{ 413 int ssize = 0, i, index = 0; 414 unsigned long s_addr = addr; 415 unsigned int max_hpte_count, valid; 416 unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; 417 unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; 418 unsigned long shift, hidx, vpn = 0, vsid, hash, slot; 419 420 shift = mmu_psize_defs[psize].shift; 421 max_hpte_count = 1U << (PMD_SHIFT - shift); 422 423 for (i = 0; i < max_hpte_count; i++) { 424 valid = hpte_valid(hpte_slot_array, i); 425 if (!valid) 426 continue; 427 hidx = hpte_hash_index(hpte_slot_array, i); 428 429 /* get the vpn */ 430 addr = s_addr + (i * (1ul << shift)); 431 if (!is_kernel_addr(addr)) { 432 ssize = user_segment_size(addr); 433 vsid = get_vsid(mm->context.id, addr, ssize); 434 WARN_ON(vsid == 0); 435 } else { 436 vsid = get_kernel_vsid(addr, mmu_kernel_ssize); 437 ssize = mmu_kernel_ssize; 438 } 439 440 vpn = hpt_vpn(addr, vsid, ssize); 441 hash = hpt_hash(vpn, shift, ssize); 442 if (hidx & _PTEIDX_SECONDARY) 443 hash = ~hash; 444 445 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; 446 slot += hidx & _PTEIDX_GROUP_IX; 447 448 slot_array[index] = slot; 449 vpn_array[index] = vpn; 450 if (index == PPC64_HUGE_HPTE_BATCH - 1) { 451 /* 452 * Now do a bluk invalidate 453 */ 454 __pSeries_lpar_hugepage_invalidate(slot_array, 455 vpn_array, 456 PPC64_HUGE_HPTE_BATCH, 457 psize, ssize); 458 index = 0; 459 } else 460 index++; 461 } 462 if (index) 463 __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, 464 index, psize, ssize); 465} 466 467static void pSeries_lpar_hpte_removebolted(unsigned long ea, 468 int psize, int ssize) 469{ 470 unsigned long vpn; 471 unsigned long slot, vsid; 472 473 vsid = get_kernel_vsid(ea, ssize); 474 vpn = hpt_vpn(ea, vsid, ssize); 475 476 slot = pSeries_lpar_hpte_find(vpn, psize, ssize); 477 BUG_ON(slot == -1); 478 /* 479 * lpar doesn't use the passed actual page size 480 */ 481 pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); 482} 483 484/* 485 * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie 486 * lock. 487 */ 488static void pSeries_lpar_flush_hash_range(unsigned long number, int local) 489{ 490 unsigned long vpn; 491 unsigned long i, pix, rc; 492 unsigned long flags = 0; 493 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); 494 int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); 495 unsigned long param[9]; 496 unsigned long hash, index, shift, hidx, slot; 497 real_pte_t pte; 498 int psize, ssize; 499 500 if (lock_tlbie) 501 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); 502 503 psize = batch->psize; 504 ssize = batch->ssize; 505 pix = 0; 506 for (i = 0; i < number; i++) { 507 vpn = batch->vpn[i]; 508 pte = batch->pte[i]; 509 pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { 510 hash = hpt_hash(vpn, shift, ssize); 511 hidx = __rpte_to_hidx(pte, index); 512 if (hidx & _PTEIDX_SECONDARY) 513 hash = ~hash; 514 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; 515 slot += hidx & _PTEIDX_GROUP_IX; 516 if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { 517 /* 518 * lpar doesn't use the passed actual page size 519 */ 520 pSeries_lpar_hpte_invalidate(slot, vpn, psize, 521 0, ssize, local); 522 } else { 523 param[pix] = HBR_REQUEST | HBR_AVPN | slot; 524 param[pix+1] = hpte_encode_avpn(vpn, psize, 525 ssize); 526 pix += 2; 527 if (pix == 8) { 528 rc = plpar_hcall9(H_BULK_REMOVE, param, 529 param[0], param[1], param[2], 530 param[3], param[4], param[5], 531 param[6], param[7]); 532 BUG_ON(rc != H_SUCCESS); 533 pix = 0; 534 } 535 } 536 } pte_iterate_hashed_end(); 537 } 538 if (pix) { 539 param[pix] = HBR_END; 540 rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], 541 param[2], param[3], param[4], param[5], 542 param[6], param[7]); 543 BUG_ON(rc != H_SUCCESS); 544 } 545 546 if (lock_tlbie) 547 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); 548} 549 550static int __init disable_bulk_remove(char *str) 551{ 552 if (strcmp(str, "off") == 0 && 553 firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { 554 printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); 555 powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; 556 } 557 return 1; 558} 559 560__setup("bulk_remove=", disable_bulk_remove); 561 562void __init hpte_init_lpar(void) 563{ 564 ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; 565 ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; 566 ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; 567 ppc_md.hpte_insert = pSeries_lpar_hpte_insert; 568 ppc_md.hpte_remove = pSeries_lpar_hpte_remove; 569 ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; 570 ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; 571 ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; 572 ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; 573} 574 575#ifdef CONFIG_PPC_SMLPAR 576#define CMO_FREE_HINT_DEFAULT 1 577static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; 578 579static int __init cmo_free_hint(char *str) 580{ 581 char *parm; 582 parm = strstrip(str); 583 584 if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { 585 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); 586 cmo_free_hint_flag = 0; 587 return 1; 588 } 589 590 cmo_free_hint_flag = 1; 591 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); 592 593 if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) 594 return 1; 595 596 return 0; 597} 598 599__setup("cmo_free_hint=", cmo_free_hint); 600 601static void pSeries_set_page_state(struct page *page, int order, 602 unsigned long state) 603{ 604 int i, j; 605 unsigned long cmo_page_sz, addr; 606 607 cmo_page_sz = cmo_get_page_size(); 608 addr = __pa((unsigned long)page_address(page)); 609 610 for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { 611 for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) 612 plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); 613 } 614} 615 616void arch_free_page(struct page *page, int order) 617{ 618 if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) 619 return; 620 621 pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); 622} 623EXPORT_SYMBOL(arch_free_page); 624 625#endif 626 627#ifdef CONFIG_TRACEPOINTS 628/* 629 * We optimise our hcall path by placing hcall_tracepoint_refcount 630 * directly in the TOC so we can check if the hcall tracepoints are 631 * enabled via a single load. 632 */ 633 634/* NB: reg/unreg are called while guarded with the tracepoints_mutex */ 635extern long hcall_tracepoint_refcount; 636 637/* 638 * Since the tracing code might execute hcalls we need to guard against 639 * recursion. One example of this are spinlocks calling H_YIELD on 640 * shared processor partitions. 641 */ 642static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); 643 644void hcall_tracepoint_regfunc(void) 645{ 646 hcall_tracepoint_refcount++; 647} 648 649void hcall_tracepoint_unregfunc(void) 650{ 651 hcall_tracepoint_refcount--; 652} 653 654void __trace_hcall_entry(unsigned long opcode, unsigned long *args) 655{ 656 unsigned long flags; 657 unsigned int *depth; 658 659 /* 660 * We cannot call tracepoints inside RCU idle regions which 661 * means we must not trace H_CEDE. 662 */ 663 if (opcode == H_CEDE) 664 return; 665 666 local_irq_save(flags); 667 668 depth = &__get_cpu_var(hcall_trace_depth); 669 670 if (*depth) 671 goto out; 672 673 (*depth)++; 674 preempt_disable(); 675 trace_hcall_entry(opcode, args); 676 (*depth)--; 677 678out: 679 local_irq_restore(flags); 680} 681 682void __trace_hcall_exit(long opcode, unsigned long retval, 683 unsigned long *retbuf) 684{ 685 unsigned long flags; 686 unsigned int *depth; 687 688 if (opcode == H_CEDE) 689 return; 690 691 local_irq_save(flags); 692 693 depth = &__get_cpu_var(hcall_trace_depth); 694 695 if (*depth) 696 goto out; 697 698 (*depth)++; 699 trace_hcall_exit(opcode, retval, retbuf); 700 preempt_enable(); 701 (*depth)--; 702 703out: 704 local_irq_restore(flags); 705} 706#endif 707 708/** 709 * h_get_mpp 710 * H_GET_MPP hcall returns info in 7 parms 711 */ 712int h_get_mpp(struct hvcall_mpp_data *mpp_data) 713{ 714 int rc; 715 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; 716 717 rc = plpar_hcall9(H_GET_MPP, retbuf); 718 719 mpp_data->entitled_mem = retbuf[0]; 720 mpp_data->mapped_mem = retbuf[1]; 721 722 mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; 723 mpp_data->pool_num = retbuf[2] & 0xffff; 724 725 mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; 726 mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; 727 mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL; 728 729 mpp_data->pool_size = retbuf[4]; 730 mpp_data->loan_request = retbuf[5]; 731 mpp_data->backing_mem = retbuf[6]; 732 733 return rc; 734} 735EXPORT_SYMBOL(h_get_mpp); 736 737int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) 738{ 739 int rc; 740 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; 741 742 rc = plpar_hcall9(H_GET_MPP_X, retbuf); 743 744 mpp_x_data->coalesced_bytes = retbuf[0]; 745 mpp_x_data->pool_coalesced_bytes = retbuf[1]; 746 mpp_x_data->pool_purr_cycles = retbuf[2]; 747 mpp_x_data->pool_spurr_cycles = retbuf[3]; 748 749 return rc; 750} 751