Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / arch / powerpc / platforms / pseries / lpar.c
blobb02af9ef3ff61ab45fb2ae86f2b49cdc6b5cc7ff
1 /*
2 * pSeries_lpar.c
3 * Copyright (C) 2001 Todd Inglett, IBM Corporation
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.
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.
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
22 /* Enables debugging of low-level hash table routines - careful! */
23 #undef DEBUG
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 #include <asm/plpar_wrappers.h>
46 #include "pseries.h"
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
56 /* in hvCall.S */
57 EXPORT_SYMBOL(plpar_hcall);
58 EXPORT_SYMBOL(plpar_hcall9);
59 EXPORT_SYMBOL(plpar_hcall_norets);
61 extern void pSeries_find_serial_port(void);
63 void vpa_init(int cpu)
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;
72 * The spec says it "may be problematic" if CPU x registers the VPA of
73 * CPU y. We should never do that, but wail if we ever do.
75 WARN_ON(cpu != smp_processor_id());
77 if (cpu_has_feature(CPU_FTR_ALTIVEC))
78 lppaca_of(cpu).vmxregs_in_use = 1;
80 if (cpu_has_feature(CPU_FTR_ARCH_207S))
81 lppaca_of(cpu).ebb_regs_in_use = 1;
83 addr = __pa(&lppaca_of(cpu));
84 ret = register_vpa(hwcpu, addr);
86 if (ret) {
87 pr_err("WARNING: VPA registration for cpu %d (hw %d) of area "
88 "%lx failed with %ld\n", cpu, hwcpu, addr, ret);
89 return;
92 * PAPR says this feature is SLB-Buffer but firmware never
93 * reports that. All SPLPAR support SLB shadow buffer.
95 addr = __pa(paca[cpu].slb_shadow_ptr);
96 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
97 ret = register_slb_shadow(hwcpu, addr);
98 if (ret)
99 pr_err("WARNING: SLB shadow buffer registration for "
100 "cpu %d (hw %d) of area %lx failed with %ld\n",
101 cpu, hwcpu, addr, ret);
105 * Register dispatch trace log, if one has been allocated.
107 pp = &paca[cpu];
108 dtl = pp->dispatch_log;
109 if (dtl) {
110 pp->dtl_ridx = 0;
111 pp->dtl_curr = dtl;
112 lppaca_of(cpu).dtl_idx = 0;
114 /* hypervisor reads buffer length from this field */
115 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
116 ret = register_dtl(hwcpu, __pa(dtl));
117 if (ret)
118 pr_err("WARNING: DTL registration of cpu %d (hw %d) "
119 "failed with %ld\n", smp_processor_id(),
120 hwcpu, ret);
121 lppaca_of(cpu).dtl_enable_mask = 2;
125 static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
126 unsigned long vpn, unsigned long pa,
127 unsigned long rflags, unsigned long vflags,
128 int psize, int apsize, int ssize)
130 unsigned long lpar_rc;
131 unsigned long flags;
132 unsigned long slot;
133 unsigned long hpte_v, hpte_r;
135 if (!(vflags & HPTE_V_BOLTED))
136 pr_devel("hpte_insert(group=%lx, vpn=%016lx, "
137 "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n",
138 hpte_group, vpn, pa, rflags, vflags, psize);
140 hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID;
141 hpte_r = hpte_encode_r(pa, psize, apsize) | rflags;
143 if (!(vflags & HPTE_V_BOLTED))
144 pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
146 /* Now fill in the actual HPTE */
147 /* Set CEC cookie to 0 */
148 /* Zero page = 0 */
149 /* I-cache Invalidate = 0 */
150 /* I-cache synchronize = 0 */
151 /* Exact = 0 */
152 flags = 0;
154 /* Make pHyp happy */
155 if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU))
156 hpte_r &= ~HPTE_R_M;
158 if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N))
159 flags |= H_COALESCE_CAND;
161 lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
162 if (unlikely(lpar_rc == H_PTEG_FULL)) {
163 if (!(vflags & HPTE_V_BOLTED))
164 pr_devel(" full\n");
165 return -1;
169 * Since we try and ioremap PHBs we don't own, the pte insert
170 * will fail. However we must catch the failure in hash_page
171 * or we will loop forever, so return -2 in this case.
173 if (unlikely(lpar_rc != H_SUCCESS)) {
174 if (!(vflags & HPTE_V_BOLTED))
175 pr_devel(" lpar err %ld\n", lpar_rc);
176 return -2;
178 if (!(vflags & HPTE_V_BOLTED))
179 pr_devel(" -> slot: %lu\n", slot & 7);
181 /* Because of iSeries, we have to pass down the secondary
182 * bucket bit here as well
184 return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
187 static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
189 static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
191 unsigned long slot_offset;
192 unsigned long lpar_rc;
193 int i;
194 unsigned long dummy1, dummy2;
196 /* pick a random slot to start at */
197 slot_offset = mftb() & 0x7;
199 for (i = 0; i < HPTES_PER_GROUP; i++) {
201 /* don't remove a bolted entry */
202 lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
203 (0x1UL << 4), &dummy1, &dummy2);
204 if (lpar_rc == H_SUCCESS)
205 return i;
208 * The test for adjunct partition is performed before the
209 * ANDCOND test. H_RESOURCE may be returned, so we need to
210 * check for that as well.
212 BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
214 slot_offset++;
215 slot_offset &= 0x7;
218 return -1;
221 static void pSeries_lpar_hptab_clear(void)
223 unsigned long size_bytes = 1UL << ppc64_pft_size;
224 unsigned long hpte_count = size_bytes >> 4;
225 struct {
226 unsigned long pteh;
227 unsigned long ptel;
228 } ptes[4];
229 long lpar_rc;
230 unsigned long i, j;
232 /* Read in batches of 4,
233 * invalidate only valid entries not in the VRMA
234 * hpte_count will be a multiple of 4
236 for (i = 0; i < hpte_count; i += 4) {
237 lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
238 if (lpar_rc != H_SUCCESS)
239 continue;
240 for (j = 0; j < 4; j++){
241 if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
242 HPTE_V_VRMA_MASK)
243 continue;
244 if (ptes[j].pteh & HPTE_V_VALID)
245 plpar_pte_remove_raw(0, i + j, 0,
246 &(ptes[j].pteh), &(ptes[j].ptel));
250 #ifdef __LITTLE_ENDIAN__
251 /* Reset exceptions to big endian */
252 if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
253 long rc;
255 rc = pseries_big_endian_exceptions();
257 * At this point it is unlikely panic() will get anything
258 * out to the user, but at least this will stop us from
259 * continuing on further and creating an even more
260 * difficult to debug situation.
262 if (rc)
263 panic("Could not enable big endian exceptions");
265 #endif
269 * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
270 * the low 3 bits of flags happen to line up. So no transform is needed.
271 * We can probably optimize here and assume the high bits of newpp are
272 * already zero. For now I am paranoid.
274 static long pSeries_lpar_hpte_updatepp(unsigned long slot,
275 unsigned long newpp,
276 unsigned long vpn,
277 int psize, int apsize,
278 int ssize, int local)
280 unsigned long lpar_rc;
281 unsigned long flags = (newpp & 7) | H_AVPN;
282 unsigned long want_v;
284 want_v = hpte_encode_avpn(vpn, psize, ssize);
286 pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
287 want_v, slot, flags, psize);
289 lpar_rc = plpar_pte_protect(flags, slot, want_v);
291 if (lpar_rc == H_NOT_FOUND) {
292 pr_devel("not found !\n");
293 return -1;
296 pr_devel("ok\n");
298 BUG_ON(lpar_rc != H_SUCCESS);
300 return 0;
303 static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
305 unsigned long dword0;
306 unsigned long lpar_rc;
307 unsigned long dummy_word1;
308 unsigned long flags;
310 /* Read 1 pte at a time */
311 /* Do not need RPN to logical page translation */
312 /* No cross CEC PFT access */
313 flags = 0;
315 lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
317 BUG_ON(lpar_rc != H_SUCCESS);
319 return dword0;
322 static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
324 unsigned long hash;
325 unsigned long i;
326 long slot;
327 unsigned long want_v, hpte_v;
329 hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
330 want_v = hpte_encode_avpn(vpn, psize, ssize);
332 /* Bolted entries are always in the primary group */
333 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
334 for (i = 0; i < HPTES_PER_GROUP; i++) {
335 hpte_v = pSeries_lpar_hpte_getword0(slot);
337 if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID))
338 /* HPTE matches */
339 return slot;
340 ++slot;
343 return -1;
346 static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
347 unsigned long ea,
348 int psize, int ssize)
350 unsigned long vpn;
351 unsigned long lpar_rc, slot, vsid, flags;
353 vsid = get_kernel_vsid(ea, ssize);
354 vpn = hpt_vpn(ea, vsid, ssize);
356 slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
357 BUG_ON(slot == -1);
359 flags = newpp & 7;
360 lpar_rc = plpar_pte_protect(flags, slot, 0);
362 BUG_ON(lpar_rc != H_SUCCESS);
365 static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
366 int psize, int apsize,
367 int ssize, int local)
369 unsigned long want_v;
370 unsigned long lpar_rc;
371 unsigned long dummy1, dummy2;
373 pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
374 slot, vpn, psize, local);
376 want_v = hpte_encode_avpn(vpn, psize, ssize);
377 lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
378 if (lpar_rc == H_NOT_FOUND)
379 return;
381 BUG_ON(lpar_rc != H_SUCCESS);
385 * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need
386 * to make sure that we avoid bouncing the hypervisor tlbie lock.
388 #define PPC64_HUGE_HPTE_BATCH 12
390 static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot,
391 unsigned long *vpn, int count,
392 int psize, int ssize)
394 unsigned long param[8];
395 int i = 0, pix = 0, rc;
396 unsigned long flags = 0;
397 int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
399 if (lock_tlbie)
400 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
402 for (i = 0; i < count; i++) {
404 if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
405 pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0,
406 ssize, 0);
407 } else {
408 param[pix] = HBR_REQUEST | HBR_AVPN | slot[i];
409 param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize);
410 pix += 2;
411 if (pix == 8) {
412 rc = plpar_hcall9(H_BULK_REMOVE, param,
413 param[0], param[1], param[2],
414 param[3], param[4], param[5],
415 param[6], param[7]);
416 BUG_ON(rc != H_SUCCESS);
417 pix = 0;
421 if (pix) {
422 param[pix] = HBR_END;
423 rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
424 param[2], param[3], param[4], param[5],
425 param[6], param[7]);
426 BUG_ON(rc != H_SUCCESS);
429 if (lock_tlbie)
430 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
433 static void pSeries_lpar_hugepage_invalidate(struct mm_struct *mm,
434 unsigned char *hpte_slot_array,
435 unsigned long addr, int psize)
437 int ssize = 0, i, index = 0;
438 unsigned long s_addr = addr;
439 unsigned int max_hpte_count, valid;
440 unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH];
441 unsigned long slot_array[PPC64_HUGE_HPTE_BATCH];
442 unsigned long shift, hidx, vpn = 0, vsid, hash, slot;
444 shift = mmu_psize_defs[psize].shift;
445 max_hpte_count = 1U << (PMD_SHIFT - shift);
447 for (i = 0; i < max_hpte_count; i++) {
448 valid = hpte_valid(hpte_slot_array, i);
449 if (!valid)
450 continue;
451 hidx = hpte_hash_index(hpte_slot_array, i);
453 /* get the vpn */
454 addr = s_addr + (i * (1ul << shift));
455 if (!is_kernel_addr(addr)) {
456 ssize = user_segment_size(addr);
457 vsid = get_vsid(mm->context.id, addr, ssize);
458 WARN_ON(vsid == 0);
459 } else {
460 vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
461 ssize = mmu_kernel_ssize;
464 vpn = hpt_vpn(addr, vsid, ssize);
465 hash = hpt_hash(vpn, shift, ssize);
466 if (hidx & _PTEIDX_SECONDARY)
467 hash = ~hash;
469 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
470 slot += hidx & _PTEIDX_GROUP_IX;
472 slot_array[index] = slot;
473 vpn_array[index] = vpn;
474 if (index == PPC64_HUGE_HPTE_BATCH - 1) {
476 * Now do a bluk invalidate
478 __pSeries_lpar_hugepage_invalidate(slot_array,
479 vpn_array,
480 PPC64_HUGE_HPTE_BATCH,
481 psize, ssize);
482 index = 0;
483 } else
484 index++;
486 if (index)
487 __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array,
488 index, psize, ssize);
491 static void pSeries_lpar_hpte_removebolted(unsigned long ea,
492 int psize, int ssize)
494 unsigned long vpn;
495 unsigned long slot, vsid;
497 vsid = get_kernel_vsid(ea, ssize);
498 vpn = hpt_vpn(ea, vsid, ssize);
500 slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
501 BUG_ON(slot == -1);
503 * lpar doesn't use the passed actual page size
505 pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0);
509 * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
510 * lock.
512 static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
514 unsigned long vpn;
515 unsigned long i, pix, rc;
516 unsigned long flags = 0;
517 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
518 int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
519 unsigned long param[9];
520 unsigned long hash, index, shift, hidx, slot;
521 real_pte_t pte;
522 int psize, ssize;
524 if (lock_tlbie)
525 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
527 psize = batch->psize;
528 ssize = batch->ssize;
529 pix = 0;
530 for (i = 0; i < number; i++) {
531 vpn = batch->vpn[i];
532 pte = batch->pte[i];
533 pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
534 hash = hpt_hash(vpn, shift, ssize);
535 hidx = __rpte_to_hidx(pte, index);
536 if (hidx & _PTEIDX_SECONDARY)
537 hash = ~hash;
538 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
539 slot += hidx & _PTEIDX_GROUP_IX;
540 if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
542 * lpar doesn't use the passed actual page size
544 pSeries_lpar_hpte_invalidate(slot, vpn, psize,
545 0, ssize, local);
546 } else {
547 param[pix] = HBR_REQUEST | HBR_AVPN | slot;
548 param[pix+1] = hpte_encode_avpn(vpn, psize,
549 ssize);
550 pix += 2;
551 if (pix == 8) {
552 rc = plpar_hcall9(H_BULK_REMOVE, param,
553 param[0], param[1], param[2],
554 param[3], param[4], param[5],
555 param[6], param[7]);
556 BUG_ON(rc != H_SUCCESS);
557 pix = 0;
560 } pte_iterate_hashed_end();
562 if (pix) {
563 param[pix] = HBR_END;
564 rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
565 param[2], param[3], param[4], param[5],
566 param[6], param[7]);
567 BUG_ON(rc != H_SUCCESS);
570 if (lock_tlbie)
571 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
574 static int __init disable_bulk_remove(char *str)
576 if (strcmp(str, "off") == 0 &&
577 firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
578 printk(KERN_INFO "Disabling BULK_REMOVE firmware feature");
579 powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
581 return 1;
584 __setup("bulk_remove=", disable_bulk_remove);
586 void __init hpte_init_lpar(void)
588 ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate;
589 ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp;
590 ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
591 ppc_md.hpte_insert = pSeries_lpar_hpte_insert;
592 ppc_md.hpte_remove = pSeries_lpar_hpte_remove;
593 ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted;
594 ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
595 ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear;
596 ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate;
599 #ifdef CONFIG_PPC_SMLPAR
600 #define CMO_FREE_HINT_DEFAULT 1
601 static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT;
603 static int __init cmo_free_hint(char *str)
605 char *parm;
606 parm = strstrip(str);
608 if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
609 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n");
610 cmo_free_hint_flag = 0;
611 return 1;
614 cmo_free_hint_flag = 1;
615 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
617 if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
618 return 1;
620 return 0;
623 __setup("cmo_free_hint=", cmo_free_hint);
625 static void pSeries_set_page_state(struct page *page, int order,
626 unsigned long state)
628 int i, j;
629 unsigned long cmo_page_sz, addr;
631 cmo_page_sz = cmo_get_page_size();
632 addr = __pa((unsigned long)page_address(page));
634 for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) {
635 for (j = 0; j < PAGE_SIZE; j += cmo_page_sz)
636 plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0);
640 void arch_free_page(struct page *page, int order)
642 if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO))
643 return;
645 pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED);
647 EXPORT_SYMBOL(arch_free_page);
649 #endif
651 #ifdef CONFIG_TRACEPOINTS
653 * We optimise our hcall path by placing hcall_tracepoint_refcount
654 * directly in the TOC so we can check if the hcall tracepoints are
655 * enabled via a single load.
658 /* NB: reg/unreg are called while guarded with the tracepoints_mutex */
659 extern long hcall_tracepoint_refcount;
662 * Since the tracing code might execute hcalls we need to guard against
663 * recursion. One example of this are spinlocks calling H_YIELD on
664 * shared processor partitions.
666 static DEFINE_PER_CPU(unsigned int, hcall_trace_depth);
668 void hcall_tracepoint_regfunc(void)
670 hcall_tracepoint_refcount++;
673 void hcall_tracepoint_unregfunc(void)
675 hcall_tracepoint_refcount--;
678 void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
680 unsigned long flags;
681 unsigned int *depth;
684 * We cannot call tracepoints inside RCU idle regions which
685 * means we must not trace H_CEDE.
687 if (opcode == H_CEDE)
688 return;
690 local_irq_save(flags);
692 depth = &__get_cpu_var(hcall_trace_depth);
694 if (*depth)
695 goto out;
697 (*depth)++;
698 preempt_disable();
699 trace_hcall_entry(opcode, args);
700 (*depth)--;
702 out:
703 local_irq_restore(flags);
706 void __trace_hcall_exit(long opcode, unsigned long retval,
707 unsigned long *retbuf)
709 unsigned long flags;
710 unsigned int *depth;
712 if (opcode == H_CEDE)
713 return;
715 local_irq_save(flags);
717 depth = &__get_cpu_var(hcall_trace_depth);
719 if (*depth)
720 goto out;
722 (*depth)++;
723 trace_hcall_exit(opcode, retval, retbuf);
724 preempt_enable();
725 (*depth)--;
727 out:
728 local_irq_restore(flags);
730 #endif
733 * h_get_mpp
734 * H_GET_MPP hcall returns info in 7 parms
736 int h_get_mpp(struct hvcall_mpp_data *mpp_data)
738 int rc;
739 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
741 rc = plpar_hcall9(H_GET_MPP, retbuf);
743 mpp_data->entitled_mem = retbuf[0];
744 mpp_data->mapped_mem = retbuf[1];
746 mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
747 mpp_data->pool_num = retbuf[2] & 0xffff;
749 mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
750 mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
751 mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL;
753 mpp_data->pool_size = retbuf[4];
754 mpp_data->loan_request = retbuf[5];
755 mpp_data->backing_mem = retbuf[6];
757 return rc;
759 EXPORT_SYMBOL(h_get_mpp);
761 int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data)
763 int rc;
764 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 };
766 rc = plpar_hcall9(H_GET_MPP_X, retbuf);
768 mpp_x_data->coalesced_bytes = retbuf[0];
769 mpp_x_data->pool_coalesced_bytes = retbuf[1];
770 mpp_x_data->pool_purr_cycles = retbuf[2];
771 mpp_x_data->pool_spurr_cycles = retbuf[3];
773 return rc;