Commit | Line | Data |
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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> |
66b15db6 | 28 | #include <linux/export.h> |
1da177e4 LT |
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> | |
1da177e4 | 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> |
f5339277 | 43 | #include <asm/firmware.h> |
a1218720 ME |
44 | |
45 | #include "plpar_wrappers.h" | |
21cf9133 | 46 | #include "pseries.h" |
1da177e4 | 47 | |
1a527286 AK |
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 | ||
1da177e4 | 55 | |
b9377ffc | 56 | /* in hvCall.S */ |
1da177e4 | 57 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 58 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 59 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 60 | |
1da177e4 LT |
61 | extern void pSeries_find_serial_port(void); |
62 | ||
1da177e4 LT |
63 | void vpa_init(int cpu) |
64 | { | |
65 | int hwcpu = get_hard_smp_processor_id(cpu); | |
2f6093c8 | 66 | unsigned long addr; |
1da177e4 | 67 | long ret; |
cf9efce0 PM |
68 | struct paca_struct *pp; |
69 | struct dtl_entry *dtl; | |
233ccd0d OJ |
70 | |
71 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
8154c5d2 | 72 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 73 | |
6e0b8bc9 ME |
74 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
75 | lppaca_of(cpu).ebb_regs_in_use = 1; | |
76 | ||
8154c5d2 | 77 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 78 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 79 | |
2f6093c8 | 80 | if (ret) { |
711ef84e AB |
81 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
82 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
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) | |
711ef84e AB |
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); | |
2f6093c8 | 96 | } |
cf9efce0 PM |
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) | |
711ef84e AB |
112 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
113 | "failed with %ld\n", smp_processor_id(), | |
114 | hwcpu, ret); | |
cf9efce0 PM |
115 | lppaca_of(cpu).dtl_enable_mask = 2; |
116 | } | |
1da177e4 LT |
117 | } |
118 | ||
035223fb | 119 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
120 | unsigned long vpn, unsigned long pa, |
121 | unsigned long rflags, unsigned long vflags, | |
b1022fbd | 122 | int psize, int apsize, int ssize) |
1da177e4 | 123 | { |
1da177e4 LT |
124 | unsigned long lpar_rc; |
125 | unsigned long flags; | |
126 | unsigned long slot; | |
96e28449 | 127 | unsigned long hpte_v, hpte_r; |
1da177e4 | 128 | |
3c726f8d | 129 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
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); | |
3c726f8d | 133 | |
b1022fbd AK |
134 | hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; |
135 | hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; | |
3c726f8d BH |
136 | |
137 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 138 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 139 | |
1da177e4 LT |
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 | ||
3c726f8d | 148 | /* Make pHyp happy */ |
443dcac4 | 149 | if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)) |
96e28449 | 150 | hpte_r &= ~_PAGE_COHERENT; |
9ee820fa BK |
151 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
152 | flags |= H_COALESCE_CAND; | |
1da177e4 | 153 | |
b9377ffc | 154 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 155 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 156 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 157 | pr_devel(" full\n"); |
1da177e4 | 158 | return -1; |
3c726f8d | 159 | } |
1da177e4 LT |
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 | */ | |
706c8c93 | 166 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 167 | if (!(vflags & HPTE_V_BOLTED)) |
4b8f63d9 | 168 | pr_devel(" lpar err %ld\n", lpar_rc); |
1da177e4 | 169 | return -2; |
3c726f8d BH |
170 | } |
171 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 172 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
173 | |
174 | /* Because of iSeries, we have to pass down the secondary | |
175 | * bucket bit here as well | |
176 | */ | |
96e28449 | 177 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
178 | } |
179 | ||
180 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
181 | ||
182 | static 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); | |
706c8c93 | 197 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 198 | return i; |
9fb26401 MW |
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); | |
1da177e4 LT |
206 | |
207 | slot_offset++; | |
208 | slot_offset &= 0x7; | |
209 | } | |
210 | ||
211 | return -1; | |
212 | } | |
213 | ||
214 | static void pSeries_lpar_hptab_clear(void) | |
215 | { | |
216 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
217 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
218 | struct { |
219 | unsigned long pteh; | |
220 | unsigned long ptel; | |
221 | } ptes[4]; | |
b7abc5c5 | 222 | long lpar_rc; |
bed9a315 | 223 | unsigned long i, j; |
d504bed6 MN |
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)); | |
b7abc5c5 SS |
240 | } |
241 | } | |
1da177e4 LT |
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 | */ | |
3c726f8d BH |
250 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
251 | unsigned long newpp, | |
5524a27d | 252 | unsigned long vpn, |
db3d8534 AK |
253 | int psize, int apsize, |
254 | int ssize, int local) | |
1da177e4 LT |
255 | { |
256 | unsigned long lpar_rc; | |
257 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 258 | unsigned long want_v; |
1da177e4 | 259 | |
5524a27d | 260 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 261 | |
551a232c | 262 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 263 | want_v, slot, flags, psize); |
1da177e4 | 264 | |
1189be65 | 265 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 266 | |
706c8c93 | 267 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 268 | pr_devel("not found !\n"); |
1da177e4 | 269 | return -1; |
3c726f8d BH |
270 | } |
271 | ||
551a232c | 272 | pr_devel("ok\n"); |
1da177e4 | 273 | |
706c8c93 | 274 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
275 | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static 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 | ||
706c8c93 | 293 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
294 | |
295 | return dword0; | |
296 | } | |
297 | ||
5524a27d | 298 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 LT |
299 | { |
300 | unsigned long hash; | |
1189be65 | 301 | unsigned long i; |
1da177e4 | 302 | long slot; |
3c726f8d | 303 | unsigned long want_v, hpte_v; |
1da177e4 | 304 | |
5524a27d AK |
305 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
306 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
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; | |
1da177e4 LT |
317 | } |
318 | ||
319 | return -1; | |
320 | } | |
321 | ||
322 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 323 | unsigned long ea, |
1189be65 | 324 | int psize, int ssize) |
1da177e4 | 325 | { |
5524a27d AK |
326 | unsigned long vpn; |
327 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 328 | |
1189be65 | 329 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 330 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 331 | |
5524a27d | 332 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
333 | BUG_ON(slot == -1); |
334 | ||
335 | flags = newpp & 7; | |
336 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
337 | ||
706c8c93 | 338 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
339 | } |
340 | ||
5524a27d | 341 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
db3d8534 AK |
342 | int psize, int apsize, |
343 | int ssize, int local) | |
1da177e4 | 344 | { |
3c726f8d | 345 | unsigned long want_v; |
1da177e4 LT |
346 | unsigned long lpar_rc; |
347 | unsigned long dummy1, dummy2; | |
348 | ||
5524a27d AK |
349 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
350 | slot, vpn, psize, local); | |
1da177e4 | 351 | |
5524a27d | 352 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 353 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 354 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
355 | return; |
356 | ||
706c8c93 | 357 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
358 | } |
359 | ||
1a527286 AK |
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 | ||
366 | static 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 | ||
409 | static 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 | ||
f8c8803b BP |
467 | static void pSeries_lpar_hpte_removebolted(unsigned long ea, |
468 | int psize, int ssize) | |
469 | { | |
5524a27d AK |
470 | unsigned long vpn; |
471 | unsigned long slot, vsid; | |
f8c8803b BP |
472 | |
473 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 474 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 475 | |
5524a27d | 476 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
f8c8803b | 477 | BUG_ON(slot == -1); |
db3d8534 AK |
478 | /* |
479 | * lpar doesn't use the passed actual page size | |
480 | */ | |
481 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); | |
f8c8803b BP |
482 | } |
483 | ||
1da177e4 LT |
484 | /* |
485 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
486 | * lock. | |
487 | */ | |
035223fb | 488 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 489 | { |
5524a27d | 490 | unsigned long vpn; |
f03e64f2 | 491 | unsigned long i, pix, rc; |
12e86f92 | 492 | unsigned long flags = 0; |
1da177e4 | 493 | struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); |
44ae3ab3 | 494 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
f03e64f2 | 495 | unsigned long param[9]; |
f03e64f2 PM |
496 | unsigned long hash, index, shift, hidx, slot; |
497 | real_pte_t pte; | |
1189be65 | 498 | int psize, ssize; |
1da177e4 LT |
499 | |
500 | if (lock_tlbie) | |
501 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
502 | ||
f03e64f2 | 503 | psize = batch->psize; |
1189be65 | 504 | ssize = batch->ssize; |
f03e64f2 PM |
505 | pix = 0; |
506 | for (i = 0; i < number; i++) { | |
5524a27d | 507 | vpn = batch->vpn[i]; |
f03e64f2 | 508 | pte = batch->pte[i]; |
5524a27d AK |
509 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
510 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
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; | |
12e86f92 | 516 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
db3d8534 AK |
517 | /* |
518 | * lpar doesn't use the passed actual page size | |
519 | */ | |
5524a27d | 520 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
db3d8534 | 521 | 0, ssize, local); |
12e86f92 PM |
522 | } else { |
523 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 524 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 525 | ssize); |
12e86f92 PM |
526 | pix += 2; |
527 | if (pix == 8) { | |
528 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
529 | param[0], param[1], param[2], |
530 | param[3], param[4], param[5], | |
531 | param[6], param[7]); | |
12e86f92 PM |
532 | BUG_ON(rc != H_SUCCESS); |
533 | pix = 0; | |
534 | } | |
f03e64f2 PM |
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 | } | |
1da177e4 LT |
545 | |
546 | if (lock_tlbie) | |
547 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
548 | } | |
549 | ||
4e89a2d8 WS |
550 | static 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 | ||
7d0daae4 | 562 | void __init hpte_init_lpar(void) |
1da177e4 LT |
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; | |
f8c8803b | 569 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
1da177e4 LT |
570 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
571 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; | |
1a527286 | 572 | ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; |
1da177e4 | 573 | } |
14f966e7 RJ |
574 | |
575 | #ifdef CONFIG_PPC_SMLPAR | |
576 | #define CMO_FREE_HINT_DEFAULT 1 | |
577 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
578 | ||
579 | static 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 | ||
601 | static 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 | ||
616 | void 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 | } | |
623 | EXPORT_SYMBOL(arch_free_page); | |
624 | ||
625 | #endif | |
c8cd093a AB |
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 */ | |
635 | extern long hcall_tracepoint_refcount; | |
636 | ||
57cdfdf8 AB |
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 | */ | |
642 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
643 | ||
c8cd093a AB |
644 | void hcall_tracepoint_regfunc(void) |
645 | { | |
646 | hcall_tracepoint_refcount++; | |
647 | } | |
648 | ||
649 | void hcall_tracepoint_unregfunc(void) | |
650 | { | |
651 | hcall_tracepoint_refcount--; | |
652 | } | |
653 | ||
6f26353c | 654 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 655 | { |
57cdfdf8 AB |
656 | unsigned long flags; |
657 | unsigned int *depth; | |
658 | ||
a5ccfee0 AB |
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 | ||
57cdfdf8 AB |
666 | local_irq_save(flags); |
667 | ||
668 | depth = &__get_cpu_var(hcall_trace_depth); | |
669 | ||
670 | if (*depth) | |
671 | goto out; | |
672 | ||
673 | (*depth)++; | |
e4f387d8 | 674 | preempt_disable(); |
6f26353c | 675 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
676 | (*depth)--; |
677 | ||
678 | out: | |
679 | local_irq_restore(flags); | |
c8cd093a AB |
680 | } |
681 | ||
6f26353c AB |
682 | void __trace_hcall_exit(long opcode, unsigned long retval, |
683 | unsigned long *retbuf) | |
c8cd093a | 684 | { |
57cdfdf8 AB |
685 | unsigned long flags; |
686 | unsigned int *depth; | |
687 | ||
a5ccfee0 AB |
688 | if (opcode == H_CEDE) |
689 | return; | |
690 | ||
57cdfdf8 AB |
691 | local_irq_save(flags); |
692 | ||
693 | depth = &__get_cpu_var(hcall_trace_depth); | |
694 | ||
695 | if (*depth) | |
696 | goto out; | |
697 | ||
698 | (*depth)++; | |
6f26353c | 699 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 700 | preempt_enable(); |
57cdfdf8 AB |
701 | (*depth)--; |
702 | ||
703 | out: | |
704 | local_irq_restore(flags); | |
c8cd093a AB |
705 | } |
706 | #endif | |
9ee820fa BK |
707 | |
708 | /** | |
709 | * h_get_mpp | |
710 | * H_GET_MPP hcall returns info in 7 parms | |
711 | */ | |
712 | int 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] & 0xffffffffffff; | |
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 | } | |
735 | EXPORT_SYMBOL(h_get_mpp); | |
736 | ||
737 | int 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 | } |