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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> |
cc1adb5f | 29 | #include <linux/static_key.h> |
1da177e4 LT |
30 | #include <asm/processor.h> |
31 | #include <asm/mmu.h> | |
32 | #include <asm/page.h> | |
33 | #include <asm/pgtable.h> | |
34 | #include <asm/machdep.h> | |
1da177e4 | 35 | #include <asm/mmu_context.h> |
1da177e4 LT |
36 | #include <asm/iommu.h> |
37 | #include <asm/tlbflush.h> | |
38 | #include <asm/tlb.h> | |
39 | #include <asm/prom.h> | |
1da177e4 | 40 | #include <asm/cputable.h> |
dcad47fc | 41 | #include <asm/udbg.h> |
2249ca9d | 42 | #include <asm/smp.h> |
c8cd093a | 43 | #include <asm/trace.h> |
f5339277 | 44 | #include <asm/firmware.h> |
212bebb4 | 45 | #include <asm/plpar_wrappers.h> |
408cddd9 | 46 | #include <asm/fadump.h> |
a1218720 | 47 | |
21cf9133 | 48 | #include "pseries.h" |
1da177e4 | 49 | |
1a527286 AK |
50 | /* Flag bits for H_BULK_REMOVE */ |
51 | #define HBR_REQUEST 0x4000000000000000UL | |
52 | #define HBR_RESPONSE 0x8000000000000000UL | |
53 | #define HBR_END 0xc000000000000000UL | |
54 | #define HBR_AVPN 0x0200000000000000UL | |
55 | #define HBR_ANDCOND 0x0100000000000000UL | |
56 | ||
1da177e4 | 57 | |
b9377ffc | 58 | /* in hvCall.S */ |
1da177e4 | 59 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 60 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 61 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 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 | 70 | |
b89bdfb8 ME |
71 | /* |
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. | |
74 | */ | |
75 | WARN_ON(cpu != smp_processor_id()); | |
76 | ||
233ccd0d | 77 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
8154c5d2 | 78 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 79 | |
6e0b8bc9 ME |
80 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
81 | lppaca_of(cpu).ebb_regs_in_use = 1; | |
82 | ||
8154c5d2 | 83 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 84 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 85 | |
2f6093c8 | 86 | if (ret) { |
711ef84e AB |
87 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
88 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
89 | return; |
90 | } | |
91 | /* | |
92 | * PAPR says this feature is SLB-Buffer but firmware never | |
93 | * reports that. All SPLPAR support SLB shadow buffer. | |
94 | */ | |
1a8f6f97 | 95 | addr = __pa(paca[cpu].slb_shadow_ptr); |
2f6093c8 MN |
96 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
97 | ret = register_slb_shadow(hwcpu, addr); | |
98 | if (ret) | |
711ef84e AB |
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); | |
2f6093c8 | 102 | } |
cf9efce0 PM |
103 | |
104 | /* | |
105 | * Register dispatch trace log, if one has been allocated. | |
106 | */ | |
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; | |
113 | ||
114 | /* hypervisor reads buffer length from this field */ | |
7ffcf8ec | 115 | dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); |
cf9efce0 PM |
116 | ret = register_dtl(hwcpu, __pa(dtl)); |
117 | if (ret) | |
711ef84e AB |
118 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
119 | "failed with %ld\n", smp_processor_id(), | |
120 | hwcpu, ret); | |
cf9efce0 PM |
121 | lppaca_of(cpu).dtl_enable_mask = 2; |
122 | } | |
1da177e4 LT |
123 | } |
124 | ||
035223fb | 125 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
126 | unsigned long vpn, unsigned long pa, |
127 | unsigned long rflags, unsigned long vflags, | |
b1022fbd | 128 | int psize, int apsize, int ssize) |
1da177e4 | 129 | { |
1da177e4 LT |
130 | unsigned long lpar_rc; |
131 | unsigned long flags; | |
132 | unsigned long slot; | |
96e28449 | 133 | unsigned long hpte_v, hpte_r; |
1da177e4 | 134 | |
3c726f8d | 135 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
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); | |
3c726f8d | 139 | |
b1022fbd AK |
140 | hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; |
141 | hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; | |
3c726f8d BH |
142 | |
143 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 144 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 145 | |
1da177e4 LT |
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; | |
153 | ||
3c726f8d | 154 | /* Make pHyp happy */ |
ad92c615 | 155 | if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU)) |
92c08a0d AK |
156 | hpte_r &= ~HPTE_R_M; |
157 | ||
9ee820fa BK |
158 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
159 | flags |= H_COALESCE_CAND; | |
1da177e4 | 160 | |
b9377ffc | 161 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 162 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 163 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 164 | pr_devel(" full\n"); |
1da177e4 | 165 | return -1; |
3c726f8d | 166 | } |
1da177e4 LT |
167 | |
168 | /* | |
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. | |
172 | */ | |
706c8c93 | 173 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 174 | if (!(vflags & HPTE_V_BOLTED)) |
4b8f63d9 | 175 | pr_devel(" lpar err %ld\n", lpar_rc); |
1da177e4 | 176 | return -2; |
3c726f8d BH |
177 | } |
178 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 179 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
180 | |
181 | /* Because of iSeries, we have to pass down the secondary | |
182 | * bucket bit here as well | |
183 | */ | |
96e28449 | 184 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
185 | } |
186 | ||
187 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
188 | ||
189 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) | |
190 | { | |
191 | unsigned long slot_offset; | |
192 | unsigned long lpar_rc; | |
193 | int i; | |
194 | unsigned long dummy1, dummy2; | |
195 | ||
196 | /* pick a random slot to start at */ | |
197 | slot_offset = mftb() & 0x7; | |
198 | ||
199 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
200 | ||
201 | /* don't remove a bolted entry */ | |
202 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, | |
203 | (0x1UL << 4), &dummy1, &dummy2); | |
706c8c93 | 204 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 205 | return i; |
9fb26401 MW |
206 | |
207 | /* | |
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. | |
211 | */ | |
212 | BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); | |
1da177e4 LT |
213 | |
214 | slot_offset++; | |
215 | slot_offset &= 0x7; | |
216 | } | |
217 | ||
218 | return -1; | |
219 | } | |
220 | ||
221 | static void pSeries_lpar_hptab_clear(void) | |
222 | { | |
223 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
224 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
225 | struct { |
226 | unsigned long pteh; | |
227 | unsigned long ptel; | |
228 | } ptes[4]; | |
b7abc5c5 | 229 | long lpar_rc; |
bed9a315 | 230 | unsigned long i, j; |
d504bed6 MN |
231 | |
232 | /* Read in batches of 4, | |
233 | * invalidate only valid entries not in the VRMA | |
234 | * hpte_count will be a multiple of 4 | |
235 | */ | |
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)); | |
b7abc5c5 SS |
247 | } |
248 | } | |
e844b1ee AB |
249 | |
250 | #ifdef __LITTLE_ENDIAN__ | |
408cddd9 HB |
251 | /* |
252 | * Reset exceptions to big endian. | |
253 | * | |
254 | * FIXME this is a hack for kexec, we need to reset the exception | |
255 | * endian before starting the new kernel and this is a convenient place | |
256 | * to do it. | |
257 | * | |
258 | * This is also called on boot when a fadump happens. In that case we | |
259 | * must not change the exception endian mode. | |
260 | */ | |
261 | if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active()) { | |
e844b1ee AB |
262 | long rc; |
263 | ||
264 | rc = pseries_big_endian_exceptions(); | |
265 | /* | |
266 | * At this point it is unlikely panic() will get anything | |
267 | * out to the user, but at least this will stop us from | |
268 | * continuing on further and creating an even more | |
269 | * difficult to debug situation. | |
270 | */ | |
271 | if (rc) | |
272 | panic("Could not enable big endian exceptions"); | |
273 | } | |
274 | #endif | |
1da177e4 LT |
275 | } |
276 | ||
277 | /* | |
278 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and | |
279 | * the low 3 bits of flags happen to line up. So no transform is needed. | |
280 | * We can probably optimize here and assume the high bits of newpp are | |
281 | * already zero. For now I am paranoid. | |
282 | */ | |
3c726f8d BH |
283 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
284 | unsigned long newpp, | |
5524a27d | 285 | unsigned long vpn, |
db3d8534 | 286 | int psize, int apsize, |
aefa5688 | 287 | int ssize, unsigned long inv_flags) |
1da177e4 LT |
288 | { |
289 | unsigned long lpar_rc; | |
290 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 291 | unsigned long want_v; |
1da177e4 | 292 | |
5524a27d | 293 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 294 | |
551a232c | 295 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 296 | want_v, slot, flags, psize); |
1da177e4 | 297 | |
1189be65 | 298 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 299 | |
706c8c93 | 300 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 301 | pr_devel("not found !\n"); |
1da177e4 | 302 | return -1; |
3c726f8d BH |
303 | } |
304 | ||
551a232c | 305 | pr_devel("ok\n"); |
1da177e4 | 306 | |
706c8c93 | 307 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) | |
313 | { | |
314 | unsigned long dword0; | |
315 | unsigned long lpar_rc; | |
316 | unsigned long dummy_word1; | |
317 | unsigned long flags; | |
318 | ||
319 | /* Read 1 pte at a time */ | |
320 | /* Do not need RPN to logical page translation */ | |
321 | /* No cross CEC PFT access */ | |
322 | flags = 0; | |
323 | ||
324 | lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); | |
325 | ||
706c8c93 | 326 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
327 | |
328 | return dword0; | |
329 | } | |
330 | ||
5524a27d | 331 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 LT |
332 | { |
333 | unsigned long hash; | |
1189be65 | 334 | unsigned long i; |
1da177e4 | 335 | long slot; |
3c726f8d | 336 | unsigned long want_v, hpte_v; |
1da177e4 | 337 | |
5524a27d AK |
338 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
339 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
340 | |
341 | /* Bolted entries are always in the primary group */ | |
342 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
343 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
344 | hpte_v = pSeries_lpar_hpte_getword0(slot); | |
345 | ||
346 | if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) | |
347 | /* HPTE matches */ | |
348 | return slot; | |
349 | ++slot; | |
1da177e4 LT |
350 | } |
351 | ||
352 | return -1; | |
353 | } | |
354 | ||
355 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 356 | unsigned long ea, |
1189be65 | 357 | int psize, int ssize) |
1da177e4 | 358 | { |
5524a27d AK |
359 | unsigned long vpn; |
360 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 361 | |
1189be65 | 362 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 363 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 364 | |
5524a27d | 365 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
366 | BUG_ON(slot == -1); |
367 | ||
368 | flags = newpp & 7; | |
369 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
370 | ||
706c8c93 | 371 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
372 | } |
373 | ||
5524a27d | 374 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
db3d8534 AK |
375 | int psize, int apsize, |
376 | int ssize, int local) | |
1da177e4 | 377 | { |
3c726f8d | 378 | unsigned long want_v; |
1da177e4 LT |
379 | unsigned long lpar_rc; |
380 | unsigned long dummy1, dummy2; | |
381 | ||
5524a27d AK |
382 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
383 | slot, vpn, psize, local); | |
1da177e4 | 384 | |
5524a27d | 385 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 386 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 387 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
388 | return; |
389 | ||
706c8c93 | 390 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
391 | } |
392 | ||
1a527286 AK |
393 | /* |
394 | * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need | |
395 | * to make sure that we avoid bouncing the hypervisor tlbie lock. | |
396 | */ | |
397 | #define PPC64_HUGE_HPTE_BATCH 12 | |
398 | ||
399 | static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, | |
400 | unsigned long *vpn, int count, | |
401 | int psize, int ssize) | |
402 | { | |
403 | unsigned long param[8]; | |
404 | int i = 0, pix = 0, rc; | |
405 | unsigned long flags = 0; | |
406 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); | |
407 | ||
408 | if (lock_tlbie) | |
409 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
410 | ||
411 | for (i = 0; i < count; i++) { | |
412 | ||
413 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
414 | pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, | |
415 | ssize, 0); | |
416 | } else { | |
417 | param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; | |
418 | param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); | |
419 | pix += 2; | |
420 | if (pix == 8) { | |
421 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
422 | param[0], param[1], param[2], | |
423 | param[3], param[4], param[5], | |
424 | param[6], param[7]); | |
425 | BUG_ON(rc != H_SUCCESS); | |
426 | pix = 0; | |
427 | } | |
428 | } | |
429 | } | |
430 | if (pix) { | |
431 | param[pix] = HBR_END; | |
432 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
433 | param[2], param[3], param[4], param[5], | |
434 | param[6], param[7]); | |
435 | BUG_ON(rc != H_SUCCESS); | |
436 | } | |
437 | ||
438 | if (lock_tlbie) | |
439 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
440 | } | |
441 | ||
fa1f8ae8 AK |
442 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, |
443 | unsigned long addr, | |
444 | unsigned char *hpte_slot_array, | |
d557b098 | 445 | int psize, int ssize, int local) |
1a527286 | 446 | { |
fa1f8ae8 | 447 | int i, index = 0; |
1a527286 AK |
448 | unsigned long s_addr = addr; |
449 | unsigned int max_hpte_count, valid; | |
450 | unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; | |
451 | unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; | |
fa1f8ae8 | 452 | unsigned long shift, hidx, vpn = 0, hash, slot; |
1a527286 AK |
453 | |
454 | shift = mmu_psize_defs[psize].shift; | |
455 | max_hpte_count = 1U << (PMD_SHIFT - shift); | |
456 | ||
457 | for (i = 0; i < max_hpte_count; i++) { | |
458 | valid = hpte_valid(hpte_slot_array, i); | |
459 | if (!valid) | |
460 | continue; | |
461 | hidx = hpte_hash_index(hpte_slot_array, i); | |
462 | ||
463 | /* get the vpn */ | |
464 | addr = s_addr + (i * (1ul << shift)); | |
1a527286 AK |
465 | vpn = hpt_vpn(addr, vsid, ssize); |
466 | hash = hpt_hash(vpn, shift, ssize); | |
467 | if (hidx & _PTEIDX_SECONDARY) | |
468 | hash = ~hash; | |
469 | ||
470 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
471 | slot += hidx & _PTEIDX_GROUP_IX; | |
472 | ||
473 | slot_array[index] = slot; | |
474 | vpn_array[index] = vpn; | |
475 | if (index == PPC64_HUGE_HPTE_BATCH - 1) { | |
476 | /* | |
477 | * Now do a bluk invalidate | |
478 | */ | |
479 | __pSeries_lpar_hugepage_invalidate(slot_array, | |
480 | vpn_array, | |
481 | PPC64_HUGE_HPTE_BATCH, | |
482 | psize, ssize); | |
483 | index = 0; | |
484 | } else | |
485 | index++; | |
486 | } | |
487 | if (index) | |
488 | __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, | |
489 | index, psize, ssize); | |
490 | } | |
491 | ||
f8c8803b BP |
492 | static void pSeries_lpar_hpte_removebolted(unsigned long ea, |
493 | int psize, int ssize) | |
494 | { | |
5524a27d AK |
495 | unsigned long vpn; |
496 | unsigned long slot, vsid; | |
f8c8803b BP |
497 | |
498 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 499 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 500 | |
5524a27d | 501 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
f8c8803b | 502 | BUG_ON(slot == -1); |
db3d8534 AK |
503 | /* |
504 | * lpar doesn't use the passed actual page size | |
505 | */ | |
506 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); | |
f8c8803b BP |
507 | } |
508 | ||
1da177e4 LT |
509 | /* |
510 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
511 | * lock. | |
512 | */ | |
035223fb | 513 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 514 | { |
5524a27d | 515 | unsigned long vpn; |
f03e64f2 | 516 | unsigned long i, pix, rc; |
12e86f92 | 517 | unsigned long flags = 0; |
69111bac | 518 | struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch); |
44ae3ab3 | 519 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
f03e64f2 | 520 | unsigned long param[9]; |
f03e64f2 PM |
521 | unsigned long hash, index, shift, hidx, slot; |
522 | real_pte_t pte; | |
1189be65 | 523 | int psize, ssize; |
1da177e4 LT |
524 | |
525 | if (lock_tlbie) | |
526 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
527 | ||
f03e64f2 | 528 | psize = batch->psize; |
1189be65 | 529 | ssize = batch->ssize; |
f03e64f2 PM |
530 | pix = 0; |
531 | for (i = 0; i < number; i++) { | |
5524a27d | 532 | vpn = batch->vpn[i]; |
f03e64f2 | 533 | pte = batch->pte[i]; |
5524a27d AK |
534 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
535 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
536 | hidx = __rpte_to_hidx(pte, index); |
537 | if (hidx & _PTEIDX_SECONDARY) | |
538 | hash = ~hash; | |
539 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
540 | slot += hidx & _PTEIDX_GROUP_IX; | |
12e86f92 | 541 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
db3d8534 AK |
542 | /* |
543 | * lpar doesn't use the passed actual page size | |
544 | */ | |
5524a27d | 545 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
db3d8534 | 546 | 0, ssize, local); |
12e86f92 PM |
547 | } else { |
548 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 549 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 550 | ssize); |
12e86f92 PM |
551 | pix += 2; |
552 | if (pix == 8) { | |
553 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
554 | param[0], param[1], param[2], |
555 | param[3], param[4], param[5], | |
556 | param[6], param[7]); | |
12e86f92 PM |
557 | BUG_ON(rc != H_SUCCESS); |
558 | pix = 0; | |
559 | } | |
f03e64f2 PM |
560 | } |
561 | } pte_iterate_hashed_end(); | |
562 | } | |
563 | if (pix) { | |
564 | param[pix] = HBR_END; | |
565 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
566 | param[2], param[3], param[4], param[5], | |
567 | param[6], param[7]); | |
568 | BUG_ON(rc != H_SUCCESS); | |
569 | } | |
1da177e4 LT |
570 | |
571 | if (lock_tlbie) | |
572 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
573 | } | |
574 | ||
4e89a2d8 WS |
575 | static int __init disable_bulk_remove(char *str) |
576 | { | |
577 | if (strcmp(str, "off") == 0 && | |
578 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
579 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); | |
580 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; | |
581 | } | |
582 | return 1; | |
583 | } | |
584 | ||
585 | __setup("bulk_remove=", disable_bulk_remove); | |
586 | ||
7d0daae4 | 587 | void __init hpte_init_lpar(void) |
1da177e4 LT |
588 | { |
589 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; | |
590 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; | |
591 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; | |
592 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; | |
593 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; | |
f8c8803b | 594 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
1da177e4 LT |
595 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
596 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; | |
1a527286 | 597 | ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; |
1da177e4 | 598 | } |
14f966e7 RJ |
599 | |
600 | #ifdef CONFIG_PPC_SMLPAR | |
601 | #define CMO_FREE_HINT_DEFAULT 1 | |
602 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
603 | ||
604 | static int __init cmo_free_hint(char *str) | |
605 | { | |
606 | char *parm; | |
607 | parm = strstrip(str); | |
608 | ||
609 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { | |
610 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); | |
611 | cmo_free_hint_flag = 0; | |
612 | return 1; | |
613 | } | |
614 | ||
615 | cmo_free_hint_flag = 1; | |
616 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); | |
617 | ||
618 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) | |
619 | return 1; | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | __setup("cmo_free_hint=", cmo_free_hint); | |
625 | ||
626 | static void pSeries_set_page_state(struct page *page, int order, | |
627 | unsigned long state) | |
628 | { | |
629 | int i, j; | |
630 | unsigned long cmo_page_sz, addr; | |
631 | ||
632 | cmo_page_sz = cmo_get_page_size(); | |
633 | addr = __pa((unsigned long)page_address(page)); | |
634 | ||
635 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { | |
636 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) | |
637 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); | |
638 | } | |
639 | } | |
640 | ||
641 | void arch_free_page(struct page *page, int order) | |
642 | { | |
643 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) | |
644 | return; | |
645 | ||
646 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); | |
647 | } | |
648 | EXPORT_SYMBOL(arch_free_page); | |
649 | ||
650 | #endif | |
c8cd093a AB |
651 | |
652 | #ifdef CONFIG_TRACEPOINTS | |
d4fe0965 | 653 | #ifdef HAVE_JUMP_LABEL |
cc1adb5f AB |
654 | struct static_key hcall_tracepoint_key = STATIC_KEY_INIT; |
655 | ||
656 | void hcall_tracepoint_regfunc(void) | |
657 | { | |
658 | static_key_slow_inc(&hcall_tracepoint_key); | |
659 | } | |
660 | ||
661 | void hcall_tracepoint_unregfunc(void) | |
662 | { | |
663 | static_key_slow_dec(&hcall_tracepoint_key); | |
664 | } | |
665 | #else | |
c8cd093a AB |
666 | /* |
667 | * We optimise our hcall path by placing hcall_tracepoint_refcount | |
668 | * directly in the TOC so we can check if the hcall tracepoints are | |
669 | * enabled via a single load. | |
670 | */ | |
671 | ||
672 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ | |
673 | extern long hcall_tracepoint_refcount; | |
674 | ||
675 | void hcall_tracepoint_regfunc(void) | |
676 | { | |
677 | hcall_tracepoint_refcount++; | |
678 | } | |
679 | ||
680 | void hcall_tracepoint_unregfunc(void) | |
681 | { | |
682 | hcall_tracepoint_refcount--; | |
683 | } | |
cc1adb5f AB |
684 | #endif |
685 | ||
686 | /* | |
687 | * Since the tracing code might execute hcalls we need to guard against | |
688 | * recursion. One example of this are spinlocks calling H_YIELD on | |
689 | * shared processor partitions. | |
690 | */ | |
691 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
692 | ||
c8cd093a | 693 | |
6f26353c | 694 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 695 | { |
57cdfdf8 AB |
696 | unsigned long flags; |
697 | unsigned int *depth; | |
698 | ||
a5ccfee0 AB |
699 | /* |
700 | * We cannot call tracepoints inside RCU idle regions which | |
701 | * means we must not trace H_CEDE. | |
702 | */ | |
703 | if (opcode == H_CEDE) | |
704 | return; | |
705 | ||
57cdfdf8 AB |
706 | local_irq_save(flags); |
707 | ||
69111bac | 708 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
709 | |
710 | if (*depth) | |
711 | goto out; | |
712 | ||
713 | (*depth)++; | |
e4f387d8 | 714 | preempt_disable(); |
6f26353c | 715 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
716 | (*depth)--; |
717 | ||
718 | out: | |
719 | local_irq_restore(flags); | |
c8cd093a AB |
720 | } |
721 | ||
6f26353c AB |
722 | void __trace_hcall_exit(long opcode, unsigned long retval, |
723 | unsigned long *retbuf) | |
c8cd093a | 724 | { |
57cdfdf8 AB |
725 | unsigned long flags; |
726 | unsigned int *depth; | |
727 | ||
a5ccfee0 AB |
728 | if (opcode == H_CEDE) |
729 | return; | |
730 | ||
57cdfdf8 AB |
731 | local_irq_save(flags); |
732 | ||
69111bac | 733 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
734 | |
735 | if (*depth) | |
736 | goto out; | |
737 | ||
738 | (*depth)++; | |
6f26353c | 739 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 740 | preempt_enable(); |
57cdfdf8 AB |
741 | (*depth)--; |
742 | ||
743 | out: | |
744 | local_irq_restore(flags); | |
c8cd093a AB |
745 | } |
746 | #endif | |
9ee820fa BK |
747 | |
748 | /** | |
749 | * h_get_mpp | |
750 | * H_GET_MPP hcall returns info in 7 parms | |
751 | */ | |
752 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
753 | { | |
754 | int rc; | |
755 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
756 | ||
757 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
758 | ||
759 | mpp_data->entitled_mem = retbuf[0]; | |
760 | mpp_data->mapped_mem = retbuf[1]; | |
761 | ||
762 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
763 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
764 | ||
765 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
766 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
b0d436c7 | 767 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL; |
9ee820fa BK |
768 | |
769 | mpp_data->pool_size = retbuf[4]; | |
770 | mpp_data->loan_request = retbuf[5]; | |
771 | mpp_data->backing_mem = retbuf[6]; | |
772 | ||
773 | return rc; | |
774 | } | |
775 | EXPORT_SYMBOL(h_get_mpp); | |
776 | ||
777 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) | |
778 | { | |
779 | int rc; | |
780 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; | |
781 | ||
782 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); | |
783 | ||
784 | mpp_x_data->coalesced_bytes = retbuf[0]; | |
785 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; | |
786 | mpp_x_data->pool_purr_cycles = retbuf[2]; | |
787 | mpp_x_data->pool_spurr_cycles = retbuf[3]; | |
788 | ||
789 | return rc; | |
790 | } |