linux/arch/powerpc/platforms/pseries/lpar.c
<<
>>
Prefs
   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/abs_addr.h>
  35#include <asm/mmu_context.h>
  36#include <asm/iommu.h>
  37#include <asm/tlbflush.h>
  38#include <asm/tlb.h>
  39#include <asm/prom.h>
  40#include <asm/cputable.h>
  41#include <asm/udbg.h>
  42#include <asm/smp.h>
  43#include <asm/trace.h>
  44
  45#include "plpar_wrappers.h"
  46#include "pseries.h"
  47
  48
  49/* in hvCall.S */
  50EXPORT_SYMBOL(plpar_hcall);
  51EXPORT_SYMBOL(plpar_hcall9);
  52EXPORT_SYMBOL(plpar_hcall_norets);
  53
  54extern void pSeries_find_serial_port(void);
  55
  56void vpa_init(int cpu)
  57{
  58        int hwcpu = get_hard_smp_processor_id(cpu);
  59        unsigned long addr;
  60        long ret;
  61        struct paca_struct *pp;
  62        struct dtl_entry *dtl;
  63
  64        if (cpu_has_feature(CPU_FTR_ALTIVEC))
  65                lppaca_of(cpu).vmxregs_in_use = 1;
  66
  67        addr = __pa(&lppaca_of(cpu));
  68        ret = register_vpa(hwcpu, addr);
  69
  70        if (ret) {
  71                pr_err("WARNING: VPA registration for cpu %d (hw %d) of area "
  72                       "%lx failed with %ld\n", cpu, hwcpu, addr, ret);
  73                return;
  74        }
  75        /*
  76         * PAPR says this feature is SLB-Buffer but firmware never
  77         * reports that.  All SPLPAR support SLB shadow buffer.
  78         */
  79        addr = __pa(&slb_shadow[cpu]);
  80        if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
  81                ret = register_slb_shadow(hwcpu, addr);
  82                if (ret)
  83                        pr_err("WARNING: SLB shadow buffer registration for "
  84                               "cpu %d (hw %d) of area %lx failed with %ld\n",
  85                               cpu, hwcpu, addr, ret);
  86        }
  87
  88        /*
  89         * Register dispatch trace log, if one has been allocated.
  90         */
  91        pp = &paca[cpu];
  92        dtl = pp->dispatch_log;
  93        if (dtl) {
  94                pp->dtl_ridx = 0;
  95                pp->dtl_curr = dtl;
  96                lppaca_of(cpu).dtl_idx = 0;
  97
  98                /* hypervisor reads buffer length from this field */
  99                dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
 100                ret = register_dtl(hwcpu, __pa(dtl));
 101                if (ret)
 102                        pr_err("WARNING: DTL registration of cpu %d (hw %d) "
 103                               "failed with %ld\n", smp_processor_id(),
 104                               hwcpu, ret);
 105                lppaca_of(cpu).dtl_enable_mask = 2;
 106        }
 107}
 108
 109static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
 110                              unsigned long va, unsigned long pa,
 111                              unsigned long rflags, unsigned long vflags,
 112                              int psize, int ssize)
 113{
 114        unsigned long lpar_rc;
 115        unsigned long flags;
 116        unsigned long slot;
 117        unsigned long hpte_v, hpte_r;
 118
 119        if (!(vflags & HPTE_V_BOLTED))
 120                pr_devel("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
 121                         "rflags=%lx, vflags=%lx, psize=%d)\n",
 122                         hpte_group, va, pa, rflags, vflags, psize);
 123
 124        hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID;
 125        hpte_r = hpte_encode_r(pa, psize) | rflags;
 126
 127        if (!(vflags & HPTE_V_BOLTED))
 128                pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
 129
 130        /* Now fill in the actual HPTE */
 131        /* Set CEC cookie to 0         */
 132        /* Zero page = 0               */
 133        /* I-cache Invalidate = 0      */
 134        /* I-cache synchronize = 0     */
 135        /* Exact = 0                   */
 136        flags = 0;
 137
 138        /* Make pHyp happy */
 139        if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU))
 140                hpte_r &= ~_PAGE_COHERENT;
 141        if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N))
 142                flags |= H_COALESCE_CAND;
 143
 144        lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
 145        if (unlikely(lpar_rc == H_PTEG_FULL)) {
 146                if (!(vflags & HPTE_V_BOLTED))
 147                        pr_devel(" full\n");
 148                return -1;
 149        }
 150
 151        /*
 152         * Since we try and ioremap PHBs we don't own, the pte insert
 153         * will fail. However we must catch the failure in hash_page
 154         * or we will loop forever, so return -2 in this case.
 155         */
 156        if (unlikely(lpar_rc != H_SUCCESS)) {
 157                if (!(vflags & HPTE_V_BOLTED))
 158                        pr_devel(" lpar err %lu\n", lpar_rc);
 159                return -2;
 160        }
 161        if (!(vflags & HPTE_V_BOLTED))
 162                pr_devel(" -> slot: %lu\n", slot & 7);
 163
 164        /* Because of iSeries, we have to pass down the secondary
 165         * bucket bit here as well
 166         */
 167        return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
 168}
 169
 170static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
 171
 172static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
 173{
 174        unsigned long slot_offset;
 175        unsigned long lpar_rc;
 176        int i;
 177        unsigned long dummy1, dummy2;
 178
 179        /* pick a random slot to start at */
 180        slot_offset = mftb() & 0x7;
 181
 182        for (i = 0; i < HPTES_PER_GROUP; i++) {
 183
 184                /* don't remove a bolted entry */
 185                lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
 186                                           (0x1UL << 4), &dummy1, &dummy2);
 187                if (lpar_rc == H_SUCCESS)
 188                        return i;
 189                BUG_ON(lpar_rc != H_NOT_FOUND);
 190
 191                slot_offset++;
 192                slot_offset &= 0x7;
 193        }
 194
 195        return -1;
 196}
 197
 198static void pSeries_lpar_hptab_clear(void)
 199{
 200        unsigned long size_bytes = 1UL << ppc64_pft_size;
 201        unsigned long hpte_count = size_bytes >> 4;
 202        struct {
 203                unsigned long pteh;
 204                unsigned long ptel;
 205        } ptes[4];
 206        long lpar_rc;
 207        unsigned long i, j;
 208
 209        /* Read in batches of 4,
 210         * invalidate only valid entries not in the VRMA
 211         * hpte_count will be a multiple of 4
 212         */
 213        for (i = 0; i < hpte_count; i += 4) {
 214                lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
 215                if (lpar_rc != H_SUCCESS)
 216                        continue;
 217                for (j = 0; j < 4; j++){
 218                        if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
 219                                HPTE_V_VRMA_MASK)
 220                                continue;
 221                        if (ptes[j].pteh & HPTE_V_VALID)
 222                                plpar_pte_remove_raw(0, i + j, 0,
 223                                        &(ptes[j].pteh), &(ptes[j].ptel));
 224                }
 225        }
 226}
 227
 228/*
 229 * This computes the AVPN and B fields of the first dword of a HPTE,
 230 * for use when we want to match an existing PTE.  The bottom 7 bits
 231 * of the returned value are zero.
 232 */
 233static inline unsigned long hpte_encode_avpn(unsigned long va, int psize,
 234                                             int ssize)
 235{
 236        unsigned long v;
 237
 238        v = (va >> 23) & ~(mmu_psize_defs[psize].avpnm);
 239        v <<= HPTE_V_AVPN_SHIFT;
 240        v |= ((unsigned long) ssize) << HPTE_V_SSIZE_SHIFT;
 241        return v;
 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 va,
 253                                       int psize, int ssize, int local)
 254{
 255        unsigned long lpar_rc;
 256        unsigned long flags = (newpp & 7) | H_AVPN;
 257        unsigned long want_v;
 258
 259        want_v = hpte_encode_avpn(va, psize, ssize);
 260
 261        pr_devel("    update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
 262                 want_v, slot, flags, psize);
 263
 264        lpar_rc = plpar_pte_protect(flags, slot, want_v);
 265
 266        if (lpar_rc == H_NOT_FOUND) {
 267                pr_devel("not found !\n");
 268                return -1;
 269        }
 270
 271        pr_devel("ok\n");
 272
 273        BUG_ON(lpar_rc != H_SUCCESS);
 274
 275        return 0;
 276}
 277
 278static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
 279{
 280        unsigned long dword0;
 281        unsigned long lpar_rc;
 282        unsigned long dummy_word1;
 283        unsigned long flags;
 284
 285        /* Read 1 pte at a time                        */
 286        /* Do not need RPN to logical page translation */
 287        /* No cross CEC PFT access                     */
 288        flags = 0;
 289
 290        lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
 291
 292        BUG_ON(lpar_rc != H_SUCCESS);
 293
 294        return dword0;
 295}
 296
 297static long pSeries_lpar_hpte_find(unsigned long va, int psize, int ssize)
 298{
 299        unsigned long hash;
 300        unsigned long i;
 301        long slot;
 302        unsigned long want_v, hpte_v;
 303
 304        hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize);
 305        want_v = hpte_encode_avpn(va, psize, ssize);
 306
 307        /* Bolted entries are always in the primary group */
 308        slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
 309        for (i = 0; i < HPTES_PER_GROUP; i++) {
 310                hpte_v = pSeries_lpar_hpte_getword0(slot);
 311
 312                if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID))
 313                        /* HPTE matches */
 314                        return slot;
 315                ++slot;
 316        }
 317
 318        return -1;
 319} 
 320
 321static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
 322                                             unsigned long ea,
 323                                             int psize, int ssize)
 324{
 325        unsigned long lpar_rc, slot, vsid, va, flags;
 326
 327        vsid = get_kernel_vsid(ea, ssize);
 328        va = hpt_va(ea, vsid, ssize);
 329
 330        slot = pSeries_lpar_hpte_find(va, psize, ssize);
 331        BUG_ON(slot == -1);
 332
 333        flags = newpp & 7;
 334        lpar_rc = plpar_pte_protect(flags, slot, 0);
 335
 336        BUG_ON(lpar_rc != H_SUCCESS);
 337}
 338
 339static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
 340                                         int psize, int ssize, int local)
 341{
 342        unsigned long want_v;
 343        unsigned long lpar_rc;
 344        unsigned long dummy1, dummy2;
 345
 346        pr_devel("    inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
 347                 slot, va, psize, local);
 348
 349        want_v = hpte_encode_avpn(va, psize, ssize);
 350        lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
 351        if (lpar_rc == H_NOT_FOUND)
 352                return;
 353
 354        BUG_ON(lpar_rc != H_SUCCESS);
 355}
 356
 357static void pSeries_lpar_hpte_removebolted(unsigned long ea,
 358                                           int psize, int ssize)
 359{
 360        unsigned long slot, vsid, va;
 361
 362        vsid = get_kernel_vsid(ea, ssize);
 363        va = hpt_va(ea, vsid, ssize);
 364
 365        slot = pSeries_lpar_hpte_find(va, psize, ssize);
 366        BUG_ON(slot == -1);
 367
 368        pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0);
 369}
 370
 371/* Flag bits for H_BULK_REMOVE */
 372#define HBR_REQUEST     0x4000000000000000UL
 373#define HBR_RESPONSE    0x8000000000000000UL
 374#define HBR_END         0xc000000000000000UL
 375#define HBR_AVPN        0x0200000000000000UL
 376#define HBR_ANDCOND     0x0100000000000000UL
 377
 378/*
 379 * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
 380 * lock.
 381 */
 382static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
 383{
 384        unsigned long i, pix, rc;
 385        unsigned long flags = 0;
 386        struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
 387        int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
 388        unsigned long param[9];
 389        unsigned long va;
 390        unsigned long hash, index, shift, hidx, slot;
 391        real_pte_t pte;
 392        int psize, ssize;
 393
 394        if (lock_tlbie)
 395                spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
 396
 397        psize = batch->psize;
 398        ssize = batch->ssize;
 399        pix = 0;
 400        for (i = 0; i < number; i++) {
 401                va = batch->vaddr[i];
 402                pte = batch->pte[i];
 403                pte_iterate_hashed_subpages(pte, psize, va, index, shift) {
 404                        hash = hpt_hash(va, shift, ssize);
 405                        hidx = __rpte_to_hidx(pte, index);
 406                        if (hidx & _PTEIDX_SECONDARY)
 407                                hash = ~hash;
 408                        slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
 409                        slot += hidx & _PTEIDX_GROUP_IX;
 410                        if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
 411                                pSeries_lpar_hpte_invalidate(slot, va, psize,
 412                                                             ssize, local);
 413                        } else {
 414                                param[pix] = HBR_REQUEST | HBR_AVPN | slot;
 415                                param[pix+1] = hpte_encode_avpn(va, psize,
 416                                                                ssize);
 417                                pix += 2;
 418                                if (pix == 8) {
 419                                        rc = plpar_hcall9(H_BULK_REMOVE, param,
 420                                                param[0], param[1], param[2],
 421                                                param[3], param[4], param[5],
 422                                                param[6], param[7]);
 423                                        BUG_ON(rc != H_SUCCESS);
 424                                        pix = 0;
 425                                }
 426                        }
 427                } pte_iterate_hashed_end();
 428        }
 429        if (pix) {
 430                param[pix] = HBR_END;
 431                rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
 432                                  param[2], param[3], param[4], param[5],
 433                                  param[6], param[7]);
 434                BUG_ON(rc != H_SUCCESS);
 435        }
 436
 437        if (lock_tlbie)
 438                spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
 439}
 440
 441static int __init disable_bulk_remove(char *str)
 442{
 443        if (strcmp(str, "off") == 0 &&
 444            firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
 445                        printk(KERN_INFO "Disabling BULK_REMOVE firmware feature");
 446                        powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
 447        }
 448        return 1;
 449}
 450
 451__setup("bulk_remove=", disable_bulk_remove);
 452
 453void __init hpte_init_lpar(void)
 454{
 455        ppc_md.hpte_invalidate  = pSeries_lpar_hpte_invalidate;
 456        ppc_md.hpte_updatepp    = pSeries_lpar_hpte_updatepp;
 457        ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
 458        ppc_md.hpte_insert      = pSeries_lpar_hpte_insert;
 459        ppc_md.hpte_remove      = pSeries_lpar_hpte_remove;
 460        ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted;
 461        ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
 462        ppc_md.hpte_clear_all   = pSeries_lpar_hptab_clear;
 463}
 464
 465#ifdef CONFIG_PPC_SMLPAR
 466#define CMO_FREE_HINT_DEFAULT 1
 467static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT;
 468
 469static int __init cmo_free_hint(char *str)
 470{
 471        char *parm;
 472        parm = strstrip(str);
 473
 474        if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
 475                printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n");
 476                cmo_free_hint_flag = 0;
 477                return 1;
 478        }
 479
 480        cmo_free_hint_flag = 1;
 481        printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
 482
 483        if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
 484                return 1;
 485
 486        return 0;
 487}
 488
 489__setup("cmo_free_hint=", cmo_free_hint);
 490
 491static void pSeries_set_page_state(struct page *page, int order,
 492                                   unsigned long state)
 493{
 494        int i, j;
 495        unsigned long cmo_page_sz, addr;
 496
 497        cmo_page_sz = cmo_get_page_size();
 498        addr = __pa((unsigned long)page_address(page));
 499
 500        for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) {
 501                for (j = 0; j < PAGE_SIZE; j += cmo_page_sz)
 502                        plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0);
 503        }
 504}
 505
 506void arch_free_page(struct page *page, int order)
 507{
 508        if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO))
 509                return;
 510
 511        pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED);
 512}
 513EXPORT_SYMBOL(arch_free_page);
 514
 515#endif
 516
 517#ifdef CONFIG_TRACEPOINTS
 518/*
 519 * We optimise our hcall path by placing hcall_tracepoint_refcount
 520 * directly in the TOC so we can check if the hcall tracepoints are
 521 * enabled via a single load.
 522 */
 523
 524/* NB: reg/unreg are called while guarded with the tracepoints_mutex */
 525extern long hcall_tracepoint_refcount;
 526
 527/* 
 528 * Since the tracing code might execute hcalls we need to guard against
 529 * recursion. One example of this are spinlocks calling H_YIELD on
 530 * shared processor partitions.
 531 */
 532static DEFINE_PER_CPU(unsigned int, hcall_trace_depth);
 533
 534void hcall_tracepoint_regfunc(void)
 535{
 536        hcall_tracepoint_refcount++;
 537}
 538
 539void hcall_tracepoint_unregfunc(void)
 540{
 541        hcall_tracepoint_refcount--;
 542}
 543
 544void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
 545{
 546        unsigned long flags;
 547        unsigned int *depth;
 548
 549        /*
 550         * We cannot call tracepoints inside RCU idle regions which
 551         * means we must not trace H_CEDE.
 552         */
 553        if (opcode == H_CEDE)
 554                return;
 555
 556        local_irq_save(flags);
 557
 558        depth = &__get_cpu_var(hcall_trace_depth);
 559
 560        if (*depth)
 561                goto out;
 562
 563        (*depth)++;
 564        preempt_disable();
 565        trace_hcall_entry(opcode, args);
 566        (*depth)--;
 567
 568out:
 569        local_irq_restore(flags);
 570}
 571
 572void __trace_hcall_exit(long opcode, unsigned long retval,
 573                        unsigned long *retbuf)
 574{
 575        unsigned long flags;
 576        unsigned int *depth;
 577
 578        if (opcode == H_CEDE)
 579                return;
 580
 581        local_irq_save(flags);
 582
 583        depth = &__get_cpu_var(hcall_trace_depth);
 584
 585        if (*depth)
 586                goto out;
 587
 588        (*depth)++;
 589        trace_hcall_exit(opcode, retval, retbuf);
 590        preempt_enable();
 591        (*depth)--;
 592
 593out:
 594        local_irq_restore(flags);
 595}
 596#endif
 597
 598/**
 599 * h_get_mpp
 600 * H_GET_MPP hcall returns info in 7 parms
 601 */
 602int h_get_mpp(struct hvcall_mpp_data *mpp_data)
 603{
 604        int rc;
 605        unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 606
 607        rc = plpar_hcall9(H_GET_MPP, retbuf);
 608
 609        mpp_data->entitled_mem = retbuf[0];
 610        mpp_data->mapped_mem = retbuf[1];
 611
 612        mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
 613        mpp_data->pool_num = retbuf[2] & 0xffff;
 614
 615        mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
 616        mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
 617        mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff;
 618
 619        mpp_data->pool_size = retbuf[4];
 620        mpp_data->loan_request = retbuf[5];
 621        mpp_data->backing_mem = retbuf[6];
 622
 623        return rc;
 624}
 625EXPORT_SYMBOL(h_get_mpp);
 626
 627int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data)
 628{
 629        int rc;
 630        unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 };
 631
 632        rc = plpar_hcall9(H_GET_MPP_X, retbuf);
 633
 634        mpp_x_data->coalesced_bytes = retbuf[0];
 635        mpp_x_data->pool_coalesced_bytes = retbuf[1];
 636        mpp_x_data->pool_purr_cycles = retbuf[2];
 637        mpp_x_data->pool_spurr_cycles = retbuf[3];
 638
 639        return rc;
 640}
 641