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