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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> |
58995a9a | 29 | #include <linux/jump_label.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> |
c1caae3d | 46 | #include <asm/kexec.h> |
408cddd9 | 47 | #include <asm/fadump.h> |
a1218720 | 48 | |
21cf9133 | 49 | #include "pseries.h" |
1da177e4 | 50 | |
1a527286 AK |
51 | /* Flag bits for H_BULK_REMOVE */ |
52 | #define HBR_REQUEST 0x4000000000000000UL | |
53 | #define HBR_RESPONSE 0x8000000000000000UL | |
54 | #define HBR_END 0xc000000000000000UL | |
55 | #define HBR_AVPN 0x0200000000000000UL | |
56 | #define HBR_ANDCOND 0x0100000000000000UL | |
57 | ||
1da177e4 | 58 | |
b9377ffc | 59 | /* in hvCall.S */ |
1da177e4 | 60 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 61 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 62 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 63 | |
1da177e4 LT |
64 | void vpa_init(int cpu) |
65 | { | |
66 | int hwcpu = get_hard_smp_processor_id(cpu); | |
2f6093c8 | 67 | unsigned long addr; |
1da177e4 | 68 | long ret; |
cf9efce0 PM |
69 | struct paca_struct *pp; |
70 | struct dtl_entry *dtl; | |
233ccd0d | 71 | |
b89bdfb8 ME |
72 | /* |
73 | * The spec says it "may be problematic" if CPU x registers the VPA of | |
74 | * CPU y. We should never do that, but wail if we ever do. | |
75 | */ | |
76 | WARN_ON(cpu != smp_processor_id()); | |
77 | ||
233ccd0d | 78 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
8154c5d2 | 79 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 80 | |
6e0b8bc9 ME |
81 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
82 | lppaca_of(cpu).ebb_regs_in_use = 1; | |
83 | ||
8154c5d2 | 84 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 85 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 86 | |
2f6093c8 | 87 | if (ret) { |
711ef84e AB |
88 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
89 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
90 | return; |
91 | } | |
92 | /* | |
93 | * PAPR says this feature is SLB-Buffer but firmware never | |
94 | * reports that. All SPLPAR support SLB shadow buffer. | |
95 | */ | |
1a8f6f97 | 96 | addr = __pa(paca[cpu].slb_shadow_ptr); |
2f6093c8 MN |
97 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
98 | ret = register_slb_shadow(hwcpu, addr); | |
99 | if (ret) | |
711ef84e AB |
100 | pr_err("WARNING: SLB shadow buffer registration for " |
101 | "cpu %d (hw %d) of area %lx failed with %ld\n", | |
102 | cpu, hwcpu, addr, ret); | |
2f6093c8 | 103 | } |
cf9efce0 PM |
104 | |
105 | /* | |
106 | * Register dispatch trace log, if one has been allocated. | |
107 | */ | |
108 | pp = &paca[cpu]; | |
109 | dtl = pp->dispatch_log; | |
110 | if (dtl) { | |
111 | pp->dtl_ridx = 0; | |
112 | pp->dtl_curr = dtl; | |
113 | lppaca_of(cpu).dtl_idx = 0; | |
114 | ||
115 | /* hypervisor reads buffer length from this field */ | |
7ffcf8ec | 116 | dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); |
cf9efce0 PM |
117 | ret = register_dtl(hwcpu, __pa(dtl)); |
118 | if (ret) | |
711ef84e AB |
119 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
120 | "failed with %ld\n", smp_processor_id(), | |
121 | hwcpu, ret); | |
cf9efce0 PM |
122 | lppaca_of(cpu).dtl_enable_mask = 2; |
123 | } | |
1da177e4 LT |
124 | } |
125 | ||
035223fb | 126 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
127 | unsigned long vpn, unsigned long pa, |
128 | unsigned long rflags, unsigned long vflags, | |
b1022fbd | 129 | int psize, int apsize, int ssize) |
1da177e4 | 130 | { |
1da177e4 LT |
131 | unsigned long lpar_rc; |
132 | unsigned long flags; | |
133 | unsigned long slot; | |
96e28449 | 134 | unsigned long hpte_v, hpte_r; |
1da177e4 | 135 | |
3c726f8d | 136 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
137 | pr_devel("hpte_insert(group=%lx, vpn=%016lx, " |
138 | "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", | |
139 | hpte_group, vpn, pa, rflags, vflags, psize); | |
3c726f8d | 140 | |
b1022fbd AK |
141 | hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; |
142 | hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; | |
3c726f8d BH |
143 | |
144 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 145 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 146 | |
1da177e4 LT |
147 | /* Now fill in the actual HPTE */ |
148 | /* Set CEC cookie to 0 */ | |
149 | /* Zero page = 0 */ | |
150 | /* I-cache Invalidate = 0 */ | |
151 | /* I-cache synchronize = 0 */ | |
152 | /* Exact = 0 */ | |
153 | flags = 0; | |
154 | ||
3c726f8d | 155 | /* Make pHyp happy */ |
ad92c615 | 156 | if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU)) |
92c08a0d AK |
157 | hpte_r &= ~HPTE_R_M; |
158 | ||
9ee820fa BK |
159 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
160 | flags |= H_COALESCE_CAND; | |
1da177e4 | 161 | |
b9377ffc | 162 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 163 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 164 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 165 | pr_devel(" full\n"); |
1da177e4 | 166 | return -1; |
3c726f8d | 167 | } |
1da177e4 LT |
168 | |
169 | /* | |
170 | * Since we try and ioremap PHBs we don't own, the pte insert | |
171 | * will fail. However we must catch the failure in hash_page | |
172 | * or we will loop forever, so return -2 in this case. | |
173 | */ | |
706c8c93 | 174 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 175 | if (!(vflags & HPTE_V_BOLTED)) |
4b8f63d9 | 176 | pr_devel(" lpar err %ld\n", lpar_rc); |
1da177e4 | 177 | return -2; |
3c726f8d BH |
178 | } |
179 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 180 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
181 | |
182 | /* Because of iSeries, we have to pass down the secondary | |
183 | * bucket bit here as well | |
184 | */ | |
96e28449 | 185 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
186 | } |
187 | ||
188 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
189 | ||
190 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) | |
191 | { | |
192 | unsigned long slot_offset; | |
193 | unsigned long lpar_rc; | |
194 | int i; | |
195 | unsigned long dummy1, dummy2; | |
196 | ||
197 | /* pick a random slot to start at */ | |
198 | slot_offset = mftb() & 0x7; | |
199 | ||
200 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
201 | ||
202 | /* don't remove a bolted entry */ | |
203 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, | |
204 | (0x1UL << 4), &dummy1, &dummy2); | |
706c8c93 | 205 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 206 | return i; |
9fb26401 MW |
207 | |
208 | /* | |
209 | * The test for adjunct partition is performed before the | |
210 | * ANDCOND test. H_RESOURCE may be returned, so we need to | |
211 | * check for that as well. | |
212 | */ | |
213 | BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); | |
1da177e4 LT |
214 | |
215 | slot_offset++; | |
216 | slot_offset &= 0x7; | |
217 | } | |
218 | ||
219 | return -1; | |
220 | } | |
221 | ||
222 | static void pSeries_lpar_hptab_clear(void) | |
223 | { | |
224 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
225 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
226 | struct { |
227 | unsigned long pteh; | |
228 | unsigned long ptel; | |
229 | } ptes[4]; | |
b7abc5c5 | 230 | long lpar_rc; |
bed9a315 | 231 | unsigned long i, j; |
d504bed6 MN |
232 | |
233 | /* Read in batches of 4, | |
234 | * invalidate only valid entries not in the VRMA | |
235 | * hpte_count will be a multiple of 4 | |
236 | */ | |
237 | for (i = 0; i < hpte_count; i += 4) { | |
238 | lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); | |
239 | if (lpar_rc != H_SUCCESS) | |
240 | continue; | |
241 | for (j = 0; j < 4; j++){ | |
242 | if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == | |
243 | HPTE_V_VRMA_MASK) | |
244 | continue; | |
245 | if (ptes[j].pteh & HPTE_V_VALID) | |
246 | plpar_pte_remove_raw(0, i + j, 0, | |
247 | &(ptes[j].pteh), &(ptes[j].ptel)); | |
b7abc5c5 SS |
248 | } |
249 | } | |
e844b1ee AB |
250 | |
251 | #ifdef __LITTLE_ENDIAN__ | |
408cddd9 HB |
252 | /* |
253 | * Reset exceptions to big endian. | |
254 | * | |
255 | * FIXME this is a hack for kexec, we need to reset the exception | |
256 | * endian before starting the new kernel and this is a convenient place | |
257 | * to do it. | |
258 | * | |
259 | * This is also called on boot when a fadump happens. In that case we | |
260 | * must not change the exception endian mode. | |
261 | */ | |
262 | if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active()) { | |
e844b1ee AB |
263 | long rc; |
264 | ||
265 | rc = pseries_big_endian_exceptions(); | |
266 | /* | |
267 | * At this point it is unlikely panic() will get anything | |
268 | * out to the user, but at least this will stop us from | |
269 | * continuing on further and creating an even more | |
270 | * difficult to debug situation. | |
c1caae3d HB |
271 | * |
272 | * There is a known problem when kdump'ing, if cpus are offline | |
273 | * the above call will fail. Rather than panicking again, keep | |
274 | * going and hope the kdump kernel is also little endian, which | |
275 | * it usually is. | |
e844b1ee | 276 | */ |
c1caae3d | 277 | if (rc && !kdump_in_progress()) |
e844b1ee AB |
278 | panic("Could not enable big endian exceptions"); |
279 | } | |
280 | #endif | |
1da177e4 LT |
281 | } |
282 | ||
283 | /* | |
284 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and | |
285 | * the low 3 bits of flags happen to line up. So no transform is needed. | |
286 | * We can probably optimize here and assume the high bits of newpp are | |
287 | * already zero. For now I am paranoid. | |
288 | */ | |
3c726f8d BH |
289 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
290 | unsigned long newpp, | |
5524a27d | 291 | unsigned long vpn, |
db3d8534 | 292 | int psize, int apsize, |
aefa5688 | 293 | int ssize, unsigned long inv_flags) |
1da177e4 LT |
294 | { |
295 | unsigned long lpar_rc; | |
296 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 297 | unsigned long want_v; |
1da177e4 | 298 | |
5524a27d | 299 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 300 | |
551a232c | 301 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 302 | want_v, slot, flags, psize); |
1da177e4 | 303 | |
1189be65 | 304 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 305 | |
706c8c93 | 306 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 307 | pr_devel("not found !\n"); |
1da177e4 | 308 | return -1; |
3c726f8d BH |
309 | } |
310 | ||
551a232c | 311 | pr_devel("ok\n"); |
1da177e4 | 312 | |
706c8c93 | 313 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) | |
319 | { | |
320 | unsigned long dword0; | |
321 | unsigned long lpar_rc; | |
322 | unsigned long dummy_word1; | |
323 | unsigned long flags; | |
324 | ||
325 | /* Read 1 pte at a time */ | |
326 | /* Do not need RPN to logical page translation */ | |
327 | /* No cross CEC PFT access */ | |
328 | flags = 0; | |
329 | ||
330 | lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); | |
331 | ||
706c8c93 | 332 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
333 | |
334 | return dword0; | |
335 | } | |
336 | ||
5524a27d | 337 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 LT |
338 | { |
339 | unsigned long hash; | |
1189be65 | 340 | unsigned long i; |
1da177e4 | 341 | long slot; |
3c726f8d | 342 | unsigned long want_v, hpte_v; |
1da177e4 | 343 | |
5524a27d AK |
344 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
345 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
346 | |
347 | /* Bolted entries are always in the primary group */ | |
348 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
349 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
350 | hpte_v = pSeries_lpar_hpte_getword0(slot); | |
351 | ||
352 | if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) | |
353 | /* HPTE matches */ | |
354 | return slot; | |
355 | ++slot; | |
1da177e4 LT |
356 | } |
357 | ||
358 | return -1; | |
359 | } | |
360 | ||
361 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 362 | unsigned long ea, |
1189be65 | 363 | int psize, int ssize) |
1da177e4 | 364 | { |
5524a27d AK |
365 | unsigned long vpn; |
366 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 367 | |
1189be65 | 368 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 369 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 370 | |
5524a27d | 371 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
372 | BUG_ON(slot == -1); |
373 | ||
374 | flags = newpp & 7; | |
375 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
376 | ||
706c8c93 | 377 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
378 | } |
379 | ||
5524a27d | 380 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
db3d8534 AK |
381 | int psize, int apsize, |
382 | int ssize, int local) | |
1da177e4 | 383 | { |
3c726f8d | 384 | unsigned long want_v; |
1da177e4 LT |
385 | unsigned long lpar_rc; |
386 | unsigned long dummy1, dummy2; | |
387 | ||
5524a27d AK |
388 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
389 | slot, vpn, psize, local); | |
1da177e4 | 390 | |
5524a27d | 391 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 392 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 393 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
394 | return; |
395 | ||
706c8c93 | 396 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
397 | } |
398 | ||
e34aa03c | 399 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
1a527286 AK |
400 | /* |
401 | * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need | |
402 | * to make sure that we avoid bouncing the hypervisor tlbie lock. | |
403 | */ | |
404 | #define PPC64_HUGE_HPTE_BATCH 12 | |
405 | ||
406 | static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, | |
407 | unsigned long *vpn, int count, | |
408 | int psize, int ssize) | |
409 | { | |
410 | unsigned long param[8]; | |
411 | int i = 0, pix = 0, rc; | |
412 | unsigned long flags = 0; | |
413 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); | |
414 | ||
415 | if (lock_tlbie) | |
416 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
417 | ||
418 | for (i = 0; i < count; i++) { | |
419 | ||
420 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
421 | pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, | |
422 | ssize, 0); | |
423 | } else { | |
424 | param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; | |
425 | param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); | |
426 | pix += 2; | |
427 | if (pix == 8) { | |
428 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
429 | param[0], param[1], param[2], | |
430 | param[3], param[4], param[5], | |
431 | param[6], param[7]); | |
432 | BUG_ON(rc != H_SUCCESS); | |
433 | pix = 0; | |
434 | } | |
435 | } | |
436 | } | |
437 | if (pix) { | |
438 | param[pix] = HBR_END; | |
439 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
440 | param[2], param[3], param[4], param[5], | |
441 | param[6], param[7]); | |
442 | BUG_ON(rc != H_SUCCESS); | |
443 | } | |
444 | ||
445 | if (lock_tlbie) | |
446 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
447 | } | |
448 | ||
fa1f8ae8 AK |
449 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, |
450 | unsigned long addr, | |
451 | unsigned char *hpte_slot_array, | |
d557b098 | 452 | int psize, int ssize, int local) |
1a527286 | 453 | { |
fa1f8ae8 | 454 | int i, index = 0; |
1a527286 AK |
455 | unsigned long s_addr = addr; |
456 | unsigned int max_hpte_count, valid; | |
457 | unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; | |
458 | unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; | |
fa1f8ae8 | 459 | unsigned long shift, hidx, vpn = 0, hash, slot; |
1a527286 AK |
460 | |
461 | shift = mmu_psize_defs[psize].shift; | |
462 | max_hpte_count = 1U << (PMD_SHIFT - shift); | |
463 | ||
464 | for (i = 0; i < max_hpte_count; i++) { | |
465 | valid = hpte_valid(hpte_slot_array, i); | |
466 | if (!valid) | |
467 | continue; | |
468 | hidx = hpte_hash_index(hpte_slot_array, i); | |
469 | ||
470 | /* get the vpn */ | |
471 | addr = s_addr + (i * (1ul << shift)); | |
1a527286 AK |
472 | vpn = hpt_vpn(addr, vsid, ssize); |
473 | hash = hpt_hash(vpn, shift, ssize); | |
474 | if (hidx & _PTEIDX_SECONDARY) | |
475 | hash = ~hash; | |
476 | ||
477 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
478 | slot += hidx & _PTEIDX_GROUP_IX; | |
479 | ||
480 | slot_array[index] = slot; | |
481 | vpn_array[index] = vpn; | |
482 | if (index == PPC64_HUGE_HPTE_BATCH - 1) { | |
483 | /* | |
484 | * Now do a bluk invalidate | |
485 | */ | |
486 | __pSeries_lpar_hugepage_invalidate(slot_array, | |
487 | vpn_array, | |
488 | PPC64_HUGE_HPTE_BATCH, | |
489 | psize, ssize); | |
490 | index = 0; | |
491 | } else | |
492 | index++; | |
493 | } | |
494 | if (index) | |
495 | __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, | |
496 | index, psize, ssize); | |
497 | } | |
e34aa03c AK |
498 | #else |
499 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, | |
500 | unsigned long addr, | |
501 | unsigned char *hpte_slot_array, | |
502 | int psize, int ssize, int local) | |
503 | { | |
504 | WARN(1, "%s called without THP support\n", __func__); | |
505 | } | |
506 | #endif | |
1a527286 | 507 | |
f8c8803b BP |
508 | static void pSeries_lpar_hpte_removebolted(unsigned long ea, |
509 | int psize, int ssize) | |
510 | { | |
5524a27d AK |
511 | unsigned long vpn; |
512 | unsigned long slot, vsid; | |
f8c8803b BP |
513 | |
514 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 515 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 516 | |
5524a27d | 517 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
f8c8803b | 518 | BUG_ON(slot == -1); |
db3d8534 AK |
519 | /* |
520 | * lpar doesn't use the passed actual page size | |
521 | */ | |
522 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); | |
f8c8803b BP |
523 | } |
524 | ||
1da177e4 LT |
525 | /* |
526 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
527 | * lock. | |
528 | */ | |
035223fb | 529 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 530 | { |
5524a27d | 531 | unsigned long vpn; |
f03e64f2 | 532 | unsigned long i, pix, rc; |
12e86f92 | 533 | unsigned long flags = 0; |
69111bac | 534 | struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch); |
44ae3ab3 | 535 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
f03e64f2 | 536 | unsigned long param[9]; |
f03e64f2 PM |
537 | unsigned long hash, index, shift, hidx, slot; |
538 | real_pte_t pte; | |
1189be65 | 539 | int psize, ssize; |
1da177e4 LT |
540 | |
541 | if (lock_tlbie) | |
542 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
543 | ||
f03e64f2 | 544 | psize = batch->psize; |
1189be65 | 545 | ssize = batch->ssize; |
f03e64f2 PM |
546 | pix = 0; |
547 | for (i = 0; i < number; i++) { | |
5524a27d | 548 | vpn = batch->vpn[i]; |
f03e64f2 | 549 | pte = batch->pte[i]; |
5524a27d AK |
550 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
551 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
552 | hidx = __rpte_to_hidx(pte, index); |
553 | if (hidx & _PTEIDX_SECONDARY) | |
554 | hash = ~hash; | |
555 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
556 | slot += hidx & _PTEIDX_GROUP_IX; | |
12e86f92 | 557 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
db3d8534 AK |
558 | /* |
559 | * lpar doesn't use the passed actual page size | |
560 | */ | |
5524a27d | 561 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
db3d8534 | 562 | 0, ssize, local); |
12e86f92 PM |
563 | } else { |
564 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 565 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 566 | ssize); |
12e86f92 PM |
567 | pix += 2; |
568 | if (pix == 8) { | |
569 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
570 | param[0], param[1], param[2], |
571 | param[3], param[4], param[5], | |
572 | param[6], param[7]); | |
12e86f92 PM |
573 | BUG_ON(rc != H_SUCCESS); |
574 | pix = 0; | |
575 | } | |
f03e64f2 PM |
576 | } |
577 | } pte_iterate_hashed_end(); | |
578 | } | |
579 | if (pix) { | |
580 | param[pix] = HBR_END; | |
581 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
582 | param[2], param[3], param[4], param[5], | |
583 | param[6], param[7]); | |
584 | BUG_ON(rc != H_SUCCESS); | |
585 | } | |
1da177e4 LT |
586 | |
587 | if (lock_tlbie) | |
588 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
589 | } | |
590 | ||
4e89a2d8 WS |
591 | static int __init disable_bulk_remove(char *str) |
592 | { | |
593 | if (strcmp(str, "off") == 0 && | |
594 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
595 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); | |
596 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; | |
597 | } | |
598 | return 1; | |
599 | } | |
600 | ||
601 | __setup("bulk_remove=", disable_bulk_remove); | |
602 | ||
7d0daae4 | 603 | void __init hpte_init_lpar(void) |
1da177e4 LT |
604 | { |
605 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; | |
606 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; | |
607 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; | |
608 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; | |
609 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; | |
f8c8803b | 610 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
1da177e4 LT |
611 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
612 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; | |
1a527286 | 613 | ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; |
1da177e4 | 614 | } |
14f966e7 RJ |
615 | |
616 | #ifdef CONFIG_PPC_SMLPAR | |
617 | #define CMO_FREE_HINT_DEFAULT 1 | |
618 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
619 | ||
620 | static int __init cmo_free_hint(char *str) | |
621 | { | |
622 | char *parm; | |
623 | parm = strstrip(str); | |
624 | ||
625 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { | |
626 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); | |
627 | cmo_free_hint_flag = 0; | |
628 | return 1; | |
629 | } | |
630 | ||
631 | cmo_free_hint_flag = 1; | |
632 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); | |
633 | ||
634 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) | |
635 | return 1; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | __setup("cmo_free_hint=", cmo_free_hint); | |
641 | ||
642 | static void pSeries_set_page_state(struct page *page, int order, | |
643 | unsigned long state) | |
644 | { | |
645 | int i, j; | |
646 | unsigned long cmo_page_sz, addr; | |
647 | ||
648 | cmo_page_sz = cmo_get_page_size(); | |
649 | addr = __pa((unsigned long)page_address(page)); | |
650 | ||
651 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { | |
652 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) | |
653 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); | |
654 | } | |
655 | } | |
656 | ||
657 | void arch_free_page(struct page *page, int order) | |
658 | { | |
659 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) | |
660 | return; | |
661 | ||
662 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); | |
663 | } | |
664 | EXPORT_SYMBOL(arch_free_page); | |
665 | ||
666 | #endif | |
c8cd093a AB |
667 | |
668 | #ifdef CONFIG_TRACEPOINTS | |
d4fe0965 | 669 | #ifdef HAVE_JUMP_LABEL |
cc1adb5f AB |
670 | struct static_key hcall_tracepoint_key = STATIC_KEY_INIT; |
671 | ||
672 | void hcall_tracepoint_regfunc(void) | |
673 | { | |
674 | static_key_slow_inc(&hcall_tracepoint_key); | |
675 | } | |
676 | ||
677 | void hcall_tracepoint_unregfunc(void) | |
678 | { | |
679 | static_key_slow_dec(&hcall_tracepoint_key); | |
680 | } | |
681 | #else | |
c8cd093a AB |
682 | /* |
683 | * We optimise our hcall path by placing hcall_tracepoint_refcount | |
684 | * directly in the TOC so we can check if the hcall tracepoints are | |
685 | * enabled via a single load. | |
686 | */ | |
687 | ||
688 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ | |
689 | extern long hcall_tracepoint_refcount; | |
690 | ||
691 | void hcall_tracepoint_regfunc(void) | |
692 | { | |
693 | hcall_tracepoint_refcount++; | |
694 | } | |
695 | ||
696 | void hcall_tracepoint_unregfunc(void) | |
697 | { | |
698 | hcall_tracepoint_refcount--; | |
699 | } | |
cc1adb5f AB |
700 | #endif |
701 | ||
702 | /* | |
703 | * Since the tracing code might execute hcalls we need to guard against | |
704 | * recursion. One example of this are spinlocks calling H_YIELD on | |
705 | * shared processor partitions. | |
706 | */ | |
707 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
708 | ||
c8cd093a | 709 | |
6f26353c | 710 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 711 | { |
57cdfdf8 AB |
712 | unsigned long flags; |
713 | unsigned int *depth; | |
714 | ||
a5ccfee0 AB |
715 | /* |
716 | * We cannot call tracepoints inside RCU idle regions which | |
717 | * means we must not trace H_CEDE. | |
718 | */ | |
719 | if (opcode == H_CEDE) | |
720 | return; | |
721 | ||
57cdfdf8 AB |
722 | local_irq_save(flags); |
723 | ||
69111bac | 724 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
725 | |
726 | if (*depth) | |
727 | goto out; | |
728 | ||
729 | (*depth)++; | |
e4f387d8 | 730 | preempt_disable(); |
6f26353c | 731 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
732 | (*depth)--; |
733 | ||
734 | out: | |
735 | local_irq_restore(flags); | |
c8cd093a AB |
736 | } |
737 | ||
6f26353c AB |
738 | void __trace_hcall_exit(long opcode, unsigned long retval, |
739 | unsigned long *retbuf) | |
c8cd093a | 740 | { |
57cdfdf8 AB |
741 | unsigned long flags; |
742 | unsigned int *depth; | |
743 | ||
a5ccfee0 AB |
744 | if (opcode == H_CEDE) |
745 | return; | |
746 | ||
57cdfdf8 AB |
747 | local_irq_save(flags); |
748 | ||
69111bac | 749 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
750 | |
751 | if (*depth) | |
752 | goto out; | |
753 | ||
754 | (*depth)++; | |
6f26353c | 755 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 756 | preempt_enable(); |
57cdfdf8 AB |
757 | (*depth)--; |
758 | ||
759 | out: | |
760 | local_irq_restore(flags); | |
c8cd093a AB |
761 | } |
762 | #endif | |
9ee820fa BK |
763 | |
764 | /** | |
765 | * h_get_mpp | |
766 | * H_GET_MPP hcall returns info in 7 parms | |
767 | */ | |
768 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
769 | { | |
770 | int rc; | |
771 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
772 | ||
773 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
774 | ||
775 | mpp_data->entitled_mem = retbuf[0]; | |
776 | mpp_data->mapped_mem = retbuf[1]; | |
777 | ||
778 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
779 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
780 | ||
781 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
782 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
b0d436c7 | 783 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL; |
9ee820fa BK |
784 | |
785 | mpp_data->pool_size = retbuf[4]; | |
786 | mpp_data->loan_request = retbuf[5]; | |
787 | mpp_data->backing_mem = retbuf[6]; | |
788 | ||
789 | return rc; | |
790 | } | |
791 | EXPORT_SYMBOL(h_get_mpp); | |
792 | ||
793 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) | |
794 | { | |
795 | int rc; | |
796 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; | |
797 | ||
798 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); | |
799 | ||
800 | mpp_x_data->coalesced_bytes = retbuf[0]; | |
801 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; | |
802 | mpp_x_data->pool_purr_cycles = retbuf[2]; | |
803 | mpp_x_data->pool_spurr_cycles = retbuf[3]; | |
804 | ||
805 | return rc; | |
806 | } |