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CommitLineData
1da177e4
LT
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
f7ebf352
ME
22/* Enables debugging of low-level hash table routines - careful! */
23#undef DEBUG
1da177e4 24
1da177e4
LT
25#include <linux/kernel.h>
26#include <linux/dma-mapping.h>
463ce0e1 27#include <linux/console.h>
1da177e4
LT
28#include <asm/processor.h>
29#include <asm/mmu.h>
30#include <asm/page.h>
31#include <asm/pgtable.h>
32#include <asm/machdep.h>
33#include <asm/abs_addr.h>
34#include <asm/mmu_context.h>
1da177e4
LT
35#include <asm/iommu.h>
36#include <asm/tlbflush.h>
37#include <asm/tlb.h>
38#include <asm/prom.h>
1da177e4 39#include <asm/cputable.h>
dcad47fc 40#include <asm/udbg.h>
2249ca9d 41#include <asm/smp.h>
c8cd093a 42#include <asm/trace.h>
a1218720
ME
43
44#include "plpar_wrappers.h"
21cf9133 45#include "pseries.h"
1da177e4 46
1da177e4 47
b9377ffc 48/* in hvCall.S */
1da177e4 49EXPORT_SYMBOL(plpar_hcall);
b9377ffc 50EXPORT_SYMBOL(plpar_hcall9);
1da177e4 51EXPORT_SYMBOL(plpar_hcall_norets);
b9377ffc 52
1da177e4
LT
53extern void pSeries_find_serial_port(void);
54
55
541b2755 56static int vtermno; /* virtual terminal# for udbg */
1da177e4
LT
57
58#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
51d3082f 59static void udbg_hvsi_putc(char c)
1da177e4
LT
60{
61 /* packet's seqno isn't used anyways */
62 uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c };
63 int rc;
64
65 if (c == '\n')
66 udbg_hvsi_putc('\r');
67
68 do {
69 rc = plpar_put_term_char(vtermno, sizeof(packet), packet);
706c8c93 70 } while (rc == H_BUSY);
1da177e4
LT
71}
72
73static long hvsi_udbg_buf_len;
74static uint8_t hvsi_udbg_buf[256];
75
76static int udbg_hvsi_getc_poll(void)
77{
78 unsigned char ch;
79 int rc, i;
80
81 if (hvsi_udbg_buf_len == 0) {
82 rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf);
706c8c93 83 if (rc != H_SUCCESS || hvsi_udbg_buf[0] != 0xff) {
1da177e4
LT
84 /* bad read or non-data packet */
85 hvsi_udbg_buf_len = 0;
86 } else {
87 /* remove the packet header */
88 for (i = 4; i < hvsi_udbg_buf_len; i++)
89 hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i];
90 hvsi_udbg_buf_len -= 4;
91 }
92 }
93
94 if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) {
95 /* no data ready */
96 hvsi_udbg_buf_len = 0;
97 return -1;
98 }
99
100 ch = hvsi_udbg_buf[0];
101 /* shift remaining data down */
102 for (i = 1; i < hvsi_udbg_buf_len; i++) {
103 hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i];
104 }
105 hvsi_udbg_buf_len--;
106
107 return ch;
108}
109
bb6b9b28 110static int udbg_hvsi_getc(void)
1da177e4
LT
111{
112 int ch;
113 for (;;) {
114 ch = udbg_hvsi_getc_poll();
115 if (ch == -1) {
116 /* This shouldn't be needed...but... */
117 volatile unsigned long delay;
118 for (delay=0; delay < 2000000; delay++)
119 ;
120 } else {
121 return ch;
122 }
123 }
124}
125
51d3082f 126static void udbg_putcLP(char c)
1da177e4
LT
127{
128 char buf[16];
129 unsigned long rc;
130
131 if (c == '\n')
132 udbg_putcLP('\r');
133
134 buf[0] = c;
135 do {
136 rc = plpar_put_term_char(vtermno, 1, buf);
706c8c93 137 } while(rc == H_BUSY);
1da177e4
LT
138}
139
140/* Buffered chars getc */
141static long inbuflen;
142static long inbuf[2]; /* must be 2 longs */
143
144static int udbg_getc_pollLP(void)
145{
146 /* The interface is tricky because it may return up to 16 chars.
147 * We save them statically for future calls to udbg_getc().
148 */
149 char ch, *buf = (char *)inbuf;
150 int i;
151 long rc;
152 if (inbuflen == 0) {
153 /* get some more chars. */
154 inbuflen = 0;
155 rc = plpar_get_term_char(vtermno, &inbuflen, buf);
706c8c93 156 if (rc != H_SUCCESS)
1da177e4
LT
157 inbuflen = 0; /* otherwise inbuflen is garbage */
158 }
159 if (inbuflen <= 0 || inbuflen > 16) {
160 /* Catch error case as well as other oddities (corruption) */
161 inbuflen = 0;
162 return -1;
163 }
164 ch = buf[0];
165 for (i = 1; i < inbuflen; i++) /* shuffle them down. */
166 buf[i-1] = buf[i];
167 inbuflen--;
168 return ch;
169}
170
bb6b9b28 171static int udbg_getcLP(void)
1da177e4
LT
172{
173 int ch;
174 for (;;) {
175 ch = udbg_getc_pollLP();
176 if (ch == -1) {
177 /* This shouldn't be needed...but... */
178 volatile unsigned long delay;
179 for (delay=0; delay < 2000000; delay++)
180 ;
181 } else {
182 return ch;
183 }
184 }
185}
186
187/* call this from early_init() for a working debug console on
188 * vterm capable LPAR machines
189 */
463ce0e1 190void __init udbg_init_debug_lpar(void)
1da177e4
LT
191{
192 vtermno = 0;
c8f1c8be
MM
193 udbg_putc = udbg_putcLP;
194 udbg_getc = udbg_getcLP;
195 udbg_getc_poll = udbg_getc_pollLP;
cb1e2ab4
ME
196
197 register_early_udbg_console();
1da177e4
LT
198}
199
200/* returns 0 if couldn't find or use /chosen/stdout as console */
463ce0e1 201void __init find_udbg_vterm(void)
1da177e4
LT
202{
203 struct device_node *stdout_node;
954a46e2
JK
204 const u32 *termno;
205 const char *name;
1da177e4
LT
206
207 /* find the boot console from /chosen/stdout */
208 if (!of_chosen)
463ce0e1 209 return;
e2eb6392 210 name = of_get_property(of_chosen, "linux,stdout-path", NULL);
1da177e4 211 if (name == NULL)
463ce0e1 212 return;
1da177e4
LT
213 stdout_node = of_find_node_by_path(name);
214 if (!stdout_node)
463ce0e1 215 return;
e2eb6392 216 name = of_get_property(stdout_node, "name", NULL);
1da177e4
LT
217 if (!name) {
218 printk(KERN_WARNING "stdout node missing 'name' property!\n");
219 goto out;
220 }
221
463ce0e1
BH
222 /* Check if it's a virtual terminal */
223 if (strncmp(name, "vty", 3) != 0)
224 goto out;
e2eb6392 225 termno = of_get_property(stdout_node, "reg", NULL);
463ce0e1
BH
226 if (termno == NULL)
227 goto out;
228 vtermno = termno[0];
229
55b61fec 230 if (of_device_is_compatible(stdout_node, "hvterm1")) {
463ce0e1
BH
231 udbg_putc = udbg_putcLP;
232 udbg_getc = udbg_getcLP;
233 udbg_getc_poll = udbg_getc_pollLP;
5faae2e5 234 add_preferred_console("hvc", termno[0] & 0xff, NULL);
55b61fec 235 } else if (of_device_is_compatible(stdout_node, "hvterm-protocol")) {
463ce0e1
BH
236 vtermno = termno[0];
237 udbg_putc = udbg_hvsi_putc;
238 udbg_getc = udbg_hvsi_getc;
239 udbg_getc_poll = udbg_hvsi_getc_poll;
5faae2e5 240 add_preferred_console("hvsi", termno[0] & 0xff, NULL);
1da177e4 241 }
1da177e4
LT
242out:
243 of_node_put(stdout_node);
1da177e4
LT
244}
245
246void vpa_init(int cpu)
247{
248 int hwcpu = get_hard_smp_processor_id(cpu);
2f6093c8 249 unsigned long addr;
1da177e4 250 long ret;
233ccd0d
OJ
251
252 if (cpu_has_feature(CPU_FTR_ALTIVEC))
3356bb9f 253 lppaca[cpu].vmxregs_in_use = 1;
233ccd0d 254
2f6093c8
MN
255 addr = __pa(&lppaca[cpu]);
256 ret = register_vpa(hwcpu, addr);
1da177e4 257
2f6093c8 258 if (ret) {
1da177e4
LT
259 printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
260 "cpu %d (hw %d) of area %lx returns %ld\n",
2f6093c8
MN
261 cpu, hwcpu, addr, ret);
262 return;
263 }
264 /*
265 * PAPR says this feature is SLB-Buffer but firmware never
266 * reports that. All SPLPAR support SLB shadow buffer.
267 */
268 addr = __pa(&slb_shadow[cpu]);
269 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
270 ret = register_slb_shadow(hwcpu, addr);
271 if (ret)
272 printk(KERN_ERR
273 "WARNING: vpa_init: SLB shadow buffer "
274 "registration for cpu %d (hw %d) of area %lx "
275 "returns %ld\n", cpu, hwcpu, addr, ret);
276 }
1da177e4
LT
277}
278
035223fb 279static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
3c726f8d
BH
280 unsigned long va, unsigned long pa,
281 unsigned long rflags, unsigned long vflags,
1189be65 282 int psize, int ssize)
1da177e4 283{
1da177e4
LT
284 unsigned long lpar_rc;
285 unsigned long flags;
286 unsigned long slot;
96e28449 287 unsigned long hpte_v, hpte_r;
1da177e4 288
3c726f8d 289 if (!(vflags & HPTE_V_BOLTED))
551a232c 290 pr_devel("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
f7ebf352
ME
291 "rflags=%lx, vflags=%lx, psize=%d)\n",
292 hpte_group, va, pa, rflags, vflags, psize);
3c726f8d 293
1189be65 294 hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID;
3c726f8d
BH
295 hpte_r = hpte_encode_r(pa, psize) | rflags;
296
297 if (!(vflags & HPTE_V_BOLTED))
551a232c 298 pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
3c726f8d 299
1da177e4
LT
300 /* Now fill in the actual HPTE */
301 /* Set CEC cookie to 0 */
302 /* Zero page = 0 */
303 /* I-cache Invalidate = 0 */
304 /* I-cache synchronize = 0 */
305 /* Exact = 0 */
306 flags = 0;
307
3c726f8d 308 /* Make pHyp happy */
443dcac4 309 if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU))
96e28449 310 hpte_r &= ~_PAGE_COHERENT;
1da177e4 311
b9377ffc 312 lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
706c8c93 313 if (unlikely(lpar_rc == H_PTEG_FULL)) {
3c726f8d 314 if (!(vflags & HPTE_V_BOLTED))
551a232c 315 pr_devel(" full\n");
1da177e4 316 return -1;
3c726f8d 317 }
1da177e4
LT
318
319 /*
320 * Since we try and ioremap PHBs we don't own, the pte insert
321 * will fail. However we must catch the failure in hash_page
322 * or we will loop forever, so return -2 in this case.
323 */
706c8c93 324 if (unlikely(lpar_rc != H_SUCCESS)) {
3c726f8d 325 if (!(vflags & HPTE_V_BOLTED))
551a232c 326 pr_devel(" lpar err %lu\n", lpar_rc);
1da177e4 327 return -2;
3c726f8d
BH
328 }
329 if (!(vflags & HPTE_V_BOLTED))
551a232c 330 pr_devel(" -> slot: %lu\n", slot & 7);
1da177e4
LT
331
332 /* Because of iSeries, we have to pass down the secondary
333 * bucket bit here as well
334 */
96e28449 335 return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
1da177e4
LT
336}
337
338static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
339
340static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
341{
342 unsigned long slot_offset;
343 unsigned long lpar_rc;
344 int i;
345 unsigned long dummy1, dummy2;
346
347 /* pick a random slot to start at */
348 slot_offset = mftb() & 0x7;
349
350 for (i = 0; i < HPTES_PER_GROUP; i++) {
351
352 /* don't remove a bolted entry */
353 lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
354 (0x1UL << 4), &dummy1, &dummy2);
706c8c93 355 if (lpar_rc == H_SUCCESS)
1da177e4 356 return i;
706c8c93 357 BUG_ON(lpar_rc != H_NOT_FOUND);
1da177e4
LT
358
359 slot_offset++;
360 slot_offset &= 0x7;
361 }
362
363 return -1;
364}
365
366static void pSeries_lpar_hptab_clear(void)
367{
368 unsigned long size_bytes = 1UL << ppc64_pft_size;
369 unsigned long hpte_count = size_bytes >> 4;
b7abc5c5
SS
370 unsigned long dummy1, dummy2, dword0;
371 long lpar_rc;
1da177e4
LT
372 int i;
373
374 /* TODO: Use bulk call */
b7abc5c5
SS
375 for (i = 0; i < hpte_count; i++) {
376 /* dont remove HPTEs with VRMA mappings */
377 lpar_rc = plpar_pte_remove_raw(H_ANDCOND, i, HPTE_V_1TB_SEG,
378 &dummy1, &dummy2);
379 if (lpar_rc == H_NOT_FOUND) {
380 lpar_rc = plpar_pte_read_raw(0, i, &dword0, &dummy1);
381 if (!lpar_rc && ((dword0 & HPTE_V_VRMA_MASK)
382 != HPTE_V_VRMA_MASK))
383 /* Can be hpte for 1TB Seg. So remove it */
384 plpar_pte_remove_raw(0, i, 0, &dummy1, &dummy2);
385 }
386 }
1da177e4
LT
387}
388
1189be65
PM
389/*
390 * This computes the AVPN and B fields of the first dword of a HPTE,
391 * for use when we want to match an existing PTE. The bottom 7 bits
392 * of the returned value are zero.
393 */
394static inline unsigned long hpte_encode_avpn(unsigned long va, int psize,
395 int ssize)
396{
397 unsigned long v;
398
399 v = (va >> 23) & ~(mmu_psize_defs[psize].avpnm);
400 v <<= HPTE_V_AVPN_SHIFT;
401 v |= ((unsigned long) ssize) << HPTE_V_SSIZE_SHIFT;
402 return v;
403}
404
1da177e4
LT
405/*
406 * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
407 * the low 3 bits of flags happen to line up. So no transform is needed.
408 * We can probably optimize here and assume the high bits of newpp are
409 * already zero. For now I am paranoid.
410 */
3c726f8d
BH
411static long pSeries_lpar_hpte_updatepp(unsigned long slot,
412 unsigned long newpp,
413 unsigned long va,
1189be65 414 int psize, int ssize, int local)
1da177e4
LT
415{
416 unsigned long lpar_rc;
417 unsigned long flags = (newpp & 7) | H_AVPN;
3c726f8d 418 unsigned long want_v;
1da177e4 419
1189be65 420 want_v = hpte_encode_avpn(va, psize, ssize);
1da177e4 421
551a232c 422 pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
f7ebf352 423 want_v, slot, flags, psize);
1da177e4 424
1189be65 425 lpar_rc = plpar_pte_protect(flags, slot, want_v);
3c726f8d 426
706c8c93 427 if (lpar_rc == H_NOT_FOUND) {
551a232c 428 pr_devel("not found !\n");
1da177e4 429 return -1;
3c726f8d
BH
430 }
431
551a232c 432 pr_devel("ok\n");
1da177e4 433
706c8c93 434 BUG_ON(lpar_rc != H_SUCCESS);
1da177e4
LT
435
436 return 0;
437}
438
439static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
440{
441 unsigned long dword0;
442 unsigned long lpar_rc;
443 unsigned long dummy_word1;
444 unsigned long flags;
445
446 /* Read 1 pte at a time */
447 /* Do not need RPN to logical page translation */
448 /* No cross CEC PFT access */
449 flags = 0;
450
451 lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
452
706c8c93 453 BUG_ON(lpar_rc != H_SUCCESS);
1da177e4
LT
454
455 return dword0;
456}
457
1189be65 458static long pSeries_lpar_hpte_find(unsigned long va, int psize, int ssize)
1da177e4
LT
459{
460 unsigned long hash;
1189be65 461 unsigned long i;
1da177e4 462 long slot;
3c726f8d 463 unsigned long want_v, hpte_v;
1da177e4 464
1189be65
PM
465 hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize);
466 want_v = hpte_encode_avpn(va, psize, ssize);
467
468 /* Bolted entries are always in the primary group */
469 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
470 for (i = 0; i < HPTES_PER_GROUP; i++) {
471 hpte_v = pSeries_lpar_hpte_getword0(slot);
472
473 if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID))
474 /* HPTE matches */
475 return slot;
476 ++slot;
1da177e4
LT
477 }
478
479 return -1;
480}
481
482static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
3c726f8d 483 unsigned long ea,
1189be65 484 int psize, int ssize)
1da177e4 485{
3c726f8d 486 unsigned long lpar_rc, slot, vsid, va, flags;
1da177e4 487
1189be65
PM
488 vsid = get_kernel_vsid(ea, ssize);
489 va = hpt_va(ea, vsid, ssize);
1da177e4 490
1189be65 491 slot = pSeries_lpar_hpte_find(va, psize, ssize);
1da177e4
LT
492 BUG_ON(slot == -1);
493
494 flags = newpp & 7;
495 lpar_rc = plpar_pte_protect(flags, slot, 0);
496
706c8c93 497 BUG_ON(lpar_rc != H_SUCCESS);
1da177e4
LT
498}
499
500static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
1189be65 501 int psize, int ssize, int local)
1da177e4 502{
3c726f8d 503 unsigned long want_v;
1da177e4
LT
504 unsigned long lpar_rc;
505 unsigned long dummy1, dummy2;
506
551a232c 507 pr_devel(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
f7ebf352 508 slot, va, psize, local);
1da177e4 509
1189be65
PM
510 want_v = hpte_encode_avpn(va, psize, ssize);
511 lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
706c8c93 512 if (lpar_rc == H_NOT_FOUND)
1da177e4
LT
513 return;
514
706c8c93 515 BUG_ON(lpar_rc != H_SUCCESS);
1da177e4
LT
516}
517
f8c8803b
BP
518static void pSeries_lpar_hpte_removebolted(unsigned long ea,
519 int psize, int ssize)
520{
521 unsigned long slot, vsid, va;
522
523 vsid = get_kernel_vsid(ea, ssize);
524 va = hpt_va(ea, vsid, ssize);
525
526 slot = pSeries_lpar_hpte_find(va, psize, ssize);
527 BUG_ON(slot == -1);
528
529 pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0);
530}
531
f03e64f2
PM
532/* Flag bits for H_BULK_REMOVE */
533#define HBR_REQUEST 0x4000000000000000UL
534#define HBR_RESPONSE 0x8000000000000000UL
535#define HBR_END 0xc000000000000000UL
536#define HBR_AVPN 0x0200000000000000UL
537#define HBR_ANDCOND 0x0100000000000000UL
538
1da177e4
LT
539/*
540 * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
541 * lock.
542 */
035223fb 543static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
1da177e4 544{
f03e64f2 545 unsigned long i, pix, rc;
12e86f92 546 unsigned long flags = 0;
1da177e4
LT
547 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
548 int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
f03e64f2
PM
549 unsigned long param[9];
550 unsigned long va;
551 unsigned long hash, index, shift, hidx, slot;
552 real_pte_t pte;
1189be65 553 int psize, ssize;
1da177e4
LT
554
555 if (lock_tlbie)
556 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
557
f03e64f2 558 psize = batch->psize;
1189be65 559 ssize = batch->ssize;
f03e64f2
PM
560 pix = 0;
561 for (i = 0; i < number; i++) {
562 va = batch->vaddr[i];
563 pte = batch->pte[i];
564 pte_iterate_hashed_subpages(pte, psize, va, index, shift) {
1189be65 565 hash = hpt_hash(va, shift, ssize);
f03e64f2
PM
566 hidx = __rpte_to_hidx(pte, index);
567 if (hidx & _PTEIDX_SECONDARY)
568 hash = ~hash;
569 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
570 slot += hidx & _PTEIDX_GROUP_IX;
12e86f92
PM
571 if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
572 pSeries_lpar_hpte_invalidate(slot, va, psize,
1189be65 573 ssize, local);
12e86f92
PM
574 } else {
575 param[pix] = HBR_REQUEST | HBR_AVPN | slot;
1189be65
PM
576 param[pix+1] = hpte_encode_avpn(va, psize,
577 ssize);
12e86f92
PM
578 pix += 2;
579 if (pix == 8) {
580 rc = plpar_hcall9(H_BULK_REMOVE, param,
f03e64f2
PM
581 param[0], param[1], param[2],
582 param[3], param[4], param[5],
583 param[6], param[7]);
12e86f92
PM
584 BUG_ON(rc != H_SUCCESS);
585 pix = 0;
586 }
f03e64f2
PM
587 }
588 } pte_iterate_hashed_end();
589 }
590 if (pix) {
591 param[pix] = HBR_END;
592 rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
593 param[2], param[3], param[4], param[5],
594 param[6], param[7]);
595 BUG_ON(rc != H_SUCCESS);
596 }
1da177e4
LT
597
598 if (lock_tlbie)
599 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
600}
601
7d0daae4 602void __init hpte_init_lpar(void)
1da177e4
LT
603{
604 ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate;
605 ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp;
606 ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
607 ppc_md.hpte_insert = pSeries_lpar_hpte_insert;
608 ppc_md.hpte_remove = pSeries_lpar_hpte_remove;
f8c8803b 609 ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted;
1da177e4
LT
610 ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
611 ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear;
1da177e4 612}
14f966e7
RJ
613
614#ifdef CONFIG_PPC_SMLPAR
615#define CMO_FREE_HINT_DEFAULT 1
616static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT;
617
618static int __init cmo_free_hint(char *str)
619{
620 char *parm;
621 parm = strstrip(str);
622
623 if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
624 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n");
625 cmo_free_hint_flag = 0;
626 return 1;
627 }
628
629 cmo_free_hint_flag = 1;
630 printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
631
632 if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
633 return 1;
634
635 return 0;
636}
637
638__setup("cmo_free_hint=", cmo_free_hint);
639
640static void pSeries_set_page_state(struct page *page, int order,
641 unsigned long state)
642{
643 int i, j;
644 unsigned long cmo_page_sz, addr;
645
646 cmo_page_sz = cmo_get_page_size();
647 addr = __pa((unsigned long)page_address(page));
648
649 for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) {
650 for (j = 0; j < PAGE_SIZE; j += cmo_page_sz)
651 plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0);
652 }
653}
654
655void arch_free_page(struct page *page, int order)
656{
657 if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO))
658 return;
659
660 pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED);
661}
662EXPORT_SYMBOL(arch_free_page);
663
664#endif
c8cd093a
AB
665
666#ifdef CONFIG_TRACEPOINTS
667/*
668 * We optimise our hcall path by placing hcall_tracepoint_refcount
669 * directly in the TOC so we can check if the hcall tracepoints are
670 * enabled via a single load.
671 */
672
673/* NB: reg/unreg are called while guarded with the tracepoints_mutex */
674extern long hcall_tracepoint_refcount;
675
676void hcall_tracepoint_regfunc(void)
677{
678 hcall_tracepoint_refcount++;
679}
680
681void hcall_tracepoint_unregfunc(void)
682{
683 hcall_tracepoint_refcount--;
684}
685
686void __trace_hcall_entry(unsigned long opcode)
687{
688 trace_hcall_entry(opcode);
689}
690
691void __trace_hcall_exit(long opcode, unsigned long retval)
692{
693 trace_hcall_exit(opcode, retval);
694}
695#endif