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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> |
42f5b4ca | 48 | #include <asm/asm-prototypes.h> |
a1218720 | 49 | |
21cf9133 | 50 | #include "pseries.h" |
1da177e4 | 51 | |
1a527286 AK |
52 | /* Flag bits for H_BULK_REMOVE */ |
53 | #define HBR_REQUEST 0x4000000000000000UL | |
54 | #define HBR_RESPONSE 0x8000000000000000UL | |
55 | #define HBR_END 0xc000000000000000UL | |
56 | #define HBR_AVPN 0x0200000000000000UL | |
57 | #define HBR_ANDCOND 0x0100000000000000UL | |
58 | ||
1da177e4 | 59 | |
b9377ffc | 60 | /* in hvCall.S */ |
1da177e4 | 61 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 62 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 63 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 64 | |
1da177e4 LT |
65 | void vpa_init(int cpu) |
66 | { | |
67 | int hwcpu = get_hard_smp_processor_id(cpu); | |
2f6093c8 | 68 | unsigned long addr; |
1da177e4 | 69 | long ret; |
cf9efce0 PM |
70 | struct paca_struct *pp; |
71 | struct dtl_entry *dtl; | |
233ccd0d | 72 | |
b89bdfb8 ME |
73 | /* |
74 | * The spec says it "may be problematic" if CPU x registers the VPA of | |
75 | * CPU y. We should never do that, but wail if we ever do. | |
76 | */ | |
77 | WARN_ON(cpu != smp_processor_id()); | |
78 | ||
233ccd0d | 79 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
8154c5d2 | 80 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 81 | |
6e0b8bc9 ME |
82 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
83 | lppaca_of(cpu).ebb_regs_in_use = 1; | |
84 | ||
8154c5d2 | 85 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 86 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 87 | |
2f6093c8 | 88 | if (ret) { |
711ef84e AB |
89 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
90 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
91 | return; |
92 | } | |
d8c476ee AK |
93 | |
94 | #ifdef CONFIG_PPC_STD_MMU_64 | |
2f6093c8 MN |
95 | /* |
96 | * PAPR says this feature is SLB-Buffer but firmware never | |
97 | * reports that. All SPLPAR support SLB shadow buffer. | |
98 | */ | |
d8c476ee AK |
99 | if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) { |
100 | addr = __pa(paca[cpu].slb_shadow_ptr); | |
2f6093c8 MN |
101 | ret = register_slb_shadow(hwcpu, addr); |
102 | if (ret) | |
711ef84e AB |
103 | pr_err("WARNING: SLB shadow buffer registration for " |
104 | "cpu %d (hw %d) of area %lx failed with %ld\n", | |
105 | cpu, hwcpu, addr, ret); | |
2f6093c8 | 106 | } |
d8c476ee | 107 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
cf9efce0 PM |
108 | |
109 | /* | |
110 | * Register dispatch trace log, if one has been allocated. | |
111 | */ | |
112 | pp = &paca[cpu]; | |
113 | dtl = pp->dispatch_log; | |
114 | if (dtl) { | |
115 | pp->dtl_ridx = 0; | |
116 | pp->dtl_curr = dtl; | |
117 | lppaca_of(cpu).dtl_idx = 0; | |
118 | ||
119 | /* hypervisor reads buffer length from this field */ | |
7ffcf8ec | 120 | dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); |
cf9efce0 PM |
121 | ret = register_dtl(hwcpu, __pa(dtl)); |
122 | if (ret) | |
711ef84e AB |
123 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
124 | "failed with %ld\n", smp_processor_id(), | |
125 | hwcpu, ret); | |
cf9efce0 PM |
126 | lppaca_of(cpu).dtl_enable_mask = 2; |
127 | } | |
1da177e4 LT |
128 | } |
129 | ||
d8c476ee AK |
130 | #ifdef CONFIG_PPC_STD_MMU_64 |
131 | ||
035223fb | 132 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
133 | unsigned long vpn, unsigned long pa, |
134 | unsigned long rflags, unsigned long vflags, | |
b1022fbd | 135 | int psize, int apsize, int ssize) |
1da177e4 | 136 | { |
1da177e4 LT |
137 | unsigned long lpar_rc; |
138 | unsigned long flags; | |
139 | unsigned long slot; | |
96e28449 | 140 | unsigned long hpte_v, hpte_r; |
1da177e4 | 141 | |
3c726f8d | 142 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
143 | pr_devel("hpte_insert(group=%lx, vpn=%016lx, " |
144 | "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", | |
145 | hpte_group, vpn, pa, rflags, vflags, psize); | |
3c726f8d | 146 | |
b1022fbd | 147 | hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; |
6b243fcf | 148 | hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; |
3c726f8d BH |
149 | |
150 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 151 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 152 | |
1da177e4 LT |
153 | /* Now fill in the actual HPTE */ |
154 | /* Set CEC cookie to 0 */ | |
155 | /* Zero page = 0 */ | |
156 | /* I-cache Invalidate = 0 */ | |
157 | /* I-cache synchronize = 0 */ | |
158 | /* Exact = 0 */ | |
159 | flags = 0; | |
160 | ||
9ee820fa BK |
161 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
162 | flags |= H_COALESCE_CAND; | |
1da177e4 | 163 | |
b9377ffc | 164 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 165 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 166 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 167 | pr_devel(" full\n"); |
1da177e4 | 168 | return -1; |
3c726f8d | 169 | } |
1da177e4 LT |
170 | |
171 | /* | |
172 | * Since we try and ioremap PHBs we don't own, the pte insert | |
173 | * will fail. However we must catch the failure in hash_page | |
174 | * or we will loop forever, so return -2 in this case. | |
175 | */ | |
706c8c93 | 176 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 177 | if (!(vflags & HPTE_V_BOLTED)) |
4b8f63d9 | 178 | pr_devel(" lpar err %ld\n", lpar_rc); |
1da177e4 | 179 | return -2; |
3c726f8d BH |
180 | } |
181 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 182 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
183 | |
184 | /* Because of iSeries, we have to pass down the secondary | |
185 | * bucket bit here as well | |
186 | */ | |
96e28449 | 187 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
188 | } |
189 | ||
190 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
191 | ||
192 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) | |
193 | { | |
194 | unsigned long slot_offset; | |
195 | unsigned long lpar_rc; | |
196 | int i; | |
197 | unsigned long dummy1, dummy2; | |
198 | ||
199 | /* pick a random slot to start at */ | |
200 | slot_offset = mftb() & 0x7; | |
201 | ||
202 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
203 | ||
204 | /* don't remove a bolted entry */ | |
205 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, | |
206 | (0x1UL << 4), &dummy1, &dummy2); | |
706c8c93 | 207 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 208 | return i; |
9fb26401 MW |
209 | |
210 | /* | |
211 | * The test for adjunct partition is performed before the | |
212 | * ANDCOND test. H_RESOURCE may be returned, so we need to | |
213 | * check for that as well. | |
214 | */ | |
215 | BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); | |
1da177e4 LT |
216 | |
217 | slot_offset++; | |
218 | slot_offset &= 0x7; | |
219 | } | |
220 | ||
221 | return -1; | |
222 | } | |
223 | ||
5246adec | 224 | static void manual_hpte_clear_all(void) |
1da177e4 LT |
225 | { |
226 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
227 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
228 | struct { |
229 | unsigned long pteh; | |
230 | unsigned long ptel; | |
231 | } ptes[4]; | |
b7abc5c5 | 232 | long lpar_rc; |
bed9a315 | 233 | unsigned long i, j; |
d504bed6 MN |
234 | |
235 | /* Read in batches of 4, | |
236 | * invalidate only valid entries not in the VRMA | |
237 | * hpte_count will be a multiple of 4 | |
238 | */ | |
239 | for (i = 0; i < hpte_count; i += 4) { | |
240 | lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); | |
241 | if (lpar_rc != H_SUCCESS) | |
242 | continue; | |
243 | for (j = 0; j < 4; j++){ | |
244 | if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == | |
245 | HPTE_V_VRMA_MASK) | |
246 | continue; | |
247 | if (ptes[j].pteh & HPTE_V_VALID) | |
248 | plpar_pte_remove_raw(0, i + j, 0, | |
249 | &(ptes[j].pteh), &(ptes[j].ptel)); | |
b7abc5c5 SS |
250 | } |
251 | } | |
5246adec AB |
252 | } |
253 | ||
254 | static int hcall_hpte_clear_all(void) | |
255 | { | |
256 | int rc; | |
257 | ||
258 | do { | |
259 | rc = plpar_hcall_norets(H_CLEAR_HPT); | |
260 | } while (rc == H_CONTINUE); | |
261 | ||
262 | return rc; | |
263 | } | |
264 | ||
265 | static void pseries_hpte_clear_all(void) | |
266 | { | |
267 | int rc; | |
268 | ||
269 | rc = hcall_hpte_clear_all(); | |
270 | if (rc != H_SUCCESS) | |
271 | manual_hpte_clear_all(); | |
e844b1ee AB |
272 | |
273 | #ifdef __LITTLE_ENDIAN__ | |
408cddd9 HB |
274 | /* |
275 | * Reset exceptions to big endian. | |
276 | * | |
277 | * FIXME this is a hack for kexec, we need to reset the exception | |
278 | * endian before starting the new kernel and this is a convenient place | |
279 | * to do it. | |
280 | * | |
281 | * This is also called on boot when a fadump happens. In that case we | |
282 | * must not change the exception endian mode. | |
283 | */ | |
d3cbff1b BH |
284 | if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active()) |
285 | pseries_big_endian_exceptions(); | |
e844b1ee | 286 | #endif |
1da177e4 LT |
287 | } |
288 | ||
289 | /* | |
290 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and | |
291 | * the low 3 bits of flags happen to line up. So no transform is needed. | |
292 | * We can probably optimize here and assume the high bits of newpp are | |
293 | * already zero. For now I am paranoid. | |
294 | */ | |
3c726f8d BH |
295 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
296 | unsigned long newpp, | |
5524a27d | 297 | unsigned long vpn, |
db3d8534 | 298 | int psize, int apsize, |
aefa5688 | 299 | int ssize, unsigned long inv_flags) |
1da177e4 LT |
300 | { |
301 | unsigned long lpar_rc; | |
302 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 303 | unsigned long want_v; |
1da177e4 | 304 | |
5524a27d | 305 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 306 | |
551a232c | 307 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 308 | want_v, slot, flags, psize); |
1da177e4 | 309 | |
1189be65 | 310 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 311 | |
706c8c93 | 312 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 313 | pr_devel("not found !\n"); |
1da177e4 | 314 | return -1; |
3c726f8d BH |
315 | } |
316 | ||
551a232c | 317 | pr_devel("ok\n"); |
1da177e4 | 318 | |
706c8c93 | 319 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
320 | |
321 | return 0; | |
322 | } | |
323 | ||
4ad90c86 | 324 | static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group) |
1da177e4 | 325 | { |
4ad90c86 AK |
326 | long lpar_rc; |
327 | unsigned long i, j; | |
328 | struct { | |
329 | unsigned long pteh; | |
330 | unsigned long ptel; | |
331 | } ptes[4]; | |
1da177e4 | 332 | |
4ad90c86 | 333 | for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) { |
1da177e4 | 334 | |
4ad90c86 AK |
335 | lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes); |
336 | if (lpar_rc != H_SUCCESS) | |
337 | continue; | |
1da177e4 | 338 | |
4ad90c86 AK |
339 | for (j = 0; j < 4; j++) { |
340 | if (HPTE_V_COMPARE(ptes[j].pteh, want_v) && | |
341 | (ptes[j].pteh & HPTE_V_VALID)) | |
342 | return i + j; | |
343 | } | |
344 | } | |
1da177e4 | 345 | |
4ad90c86 | 346 | return -1; |
1da177e4 LT |
347 | } |
348 | ||
5524a27d | 349 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 | 350 | { |
1da177e4 | 351 | long slot; |
4ad90c86 AK |
352 | unsigned long hash; |
353 | unsigned long want_v; | |
354 | unsigned long hpte_group; | |
1da177e4 | 355 | |
5524a27d AK |
356 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
357 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
358 | |
359 | /* Bolted entries are always in the primary group */ | |
4ad90c86 AK |
360 | hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
361 | slot = __pSeries_lpar_hpte_find(want_v, hpte_group); | |
362 | if (slot < 0) | |
363 | return -1; | |
364 | return hpte_group + slot; | |
365 | } | |
1da177e4 LT |
366 | |
367 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 368 | unsigned long ea, |
1189be65 | 369 | int psize, int ssize) |
1da177e4 | 370 | { |
5524a27d AK |
371 | unsigned long vpn; |
372 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 373 | |
1189be65 | 374 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 375 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 376 | |
5524a27d | 377 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
378 | BUG_ON(slot == -1); |
379 | ||
380 | flags = newpp & 7; | |
381 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
382 | ||
706c8c93 | 383 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
384 | } |
385 | ||
5524a27d | 386 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
db3d8534 AK |
387 | int psize, int apsize, |
388 | int ssize, int local) | |
1da177e4 | 389 | { |
3c726f8d | 390 | unsigned long want_v; |
1da177e4 LT |
391 | unsigned long lpar_rc; |
392 | unsigned long dummy1, dummy2; | |
393 | ||
5524a27d AK |
394 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
395 | slot, vpn, psize, local); | |
1da177e4 | 396 | |
5524a27d | 397 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 398 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 399 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
400 | return; |
401 | ||
706c8c93 | 402 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
403 | } |
404 | ||
e34aa03c | 405 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
1a527286 AK |
406 | /* |
407 | * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need | |
408 | * to make sure that we avoid bouncing the hypervisor tlbie lock. | |
409 | */ | |
410 | #define PPC64_HUGE_HPTE_BATCH 12 | |
411 | ||
412 | static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, | |
413 | unsigned long *vpn, int count, | |
414 | int psize, int ssize) | |
415 | { | |
05af40e8 | 416 | unsigned long param[PLPAR_HCALL9_BUFSIZE]; |
1a527286 AK |
417 | int i = 0, pix = 0, rc; |
418 | unsigned long flags = 0; | |
419 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); | |
420 | ||
421 | if (lock_tlbie) | |
422 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
423 | ||
424 | for (i = 0; i < count; i++) { | |
425 | ||
426 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
427 | pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, | |
428 | ssize, 0); | |
429 | } else { | |
430 | param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; | |
431 | param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); | |
432 | pix += 2; | |
433 | if (pix == 8) { | |
434 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
435 | param[0], param[1], param[2], | |
436 | param[3], param[4], param[5], | |
437 | param[6], param[7]); | |
438 | BUG_ON(rc != H_SUCCESS); | |
439 | pix = 0; | |
440 | } | |
441 | } | |
442 | } | |
443 | if (pix) { | |
444 | param[pix] = HBR_END; | |
445 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
446 | param[2], param[3], param[4], param[5], | |
447 | param[6], param[7]); | |
448 | BUG_ON(rc != H_SUCCESS); | |
449 | } | |
450 | ||
451 | if (lock_tlbie) | |
452 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
453 | } | |
454 | ||
fa1f8ae8 AK |
455 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, |
456 | unsigned long addr, | |
457 | unsigned char *hpte_slot_array, | |
d557b098 | 458 | int psize, int ssize, int local) |
1a527286 | 459 | { |
fa1f8ae8 | 460 | int i, index = 0; |
1a527286 AK |
461 | unsigned long s_addr = addr; |
462 | unsigned int max_hpte_count, valid; | |
463 | unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; | |
464 | unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; | |
fa1f8ae8 | 465 | unsigned long shift, hidx, vpn = 0, hash, slot; |
1a527286 AK |
466 | |
467 | shift = mmu_psize_defs[psize].shift; | |
468 | max_hpte_count = 1U << (PMD_SHIFT - shift); | |
469 | ||
470 | for (i = 0; i < max_hpte_count; i++) { | |
471 | valid = hpte_valid(hpte_slot_array, i); | |
472 | if (!valid) | |
473 | continue; | |
474 | hidx = hpte_hash_index(hpte_slot_array, i); | |
475 | ||
476 | /* get the vpn */ | |
477 | addr = s_addr + (i * (1ul << shift)); | |
1a527286 AK |
478 | vpn = hpt_vpn(addr, vsid, ssize); |
479 | hash = hpt_hash(vpn, shift, ssize); | |
480 | if (hidx & _PTEIDX_SECONDARY) | |
481 | hash = ~hash; | |
482 | ||
483 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
484 | slot += hidx & _PTEIDX_GROUP_IX; | |
485 | ||
486 | slot_array[index] = slot; | |
487 | vpn_array[index] = vpn; | |
488 | if (index == PPC64_HUGE_HPTE_BATCH - 1) { | |
489 | /* | |
490 | * Now do a bluk invalidate | |
491 | */ | |
492 | __pSeries_lpar_hugepage_invalidate(slot_array, | |
493 | vpn_array, | |
494 | PPC64_HUGE_HPTE_BATCH, | |
495 | psize, ssize); | |
496 | index = 0; | |
497 | } else | |
498 | index++; | |
499 | } | |
500 | if (index) | |
501 | __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, | |
502 | index, psize, ssize); | |
503 | } | |
e34aa03c AK |
504 | #else |
505 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, | |
506 | unsigned long addr, | |
507 | unsigned char *hpte_slot_array, | |
508 | int psize, int ssize, int local) | |
509 | { | |
510 | WARN(1, "%s called without THP support\n", __func__); | |
511 | } | |
512 | #endif | |
1a527286 | 513 | |
27828f98 DG |
514 | static int pSeries_lpar_hpte_removebolted(unsigned long ea, |
515 | int psize, int ssize) | |
f8c8803b | 516 | { |
5524a27d AK |
517 | unsigned long vpn; |
518 | unsigned long slot, vsid; | |
f8c8803b BP |
519 | |
520 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 521 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 522 | |
5524a27d | 523 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
27828f98 DG |
524 | if (slot == -1) |
525 | return -ENOENT; | |
526 | ||
db3d8534 AK |
527 | /* |
528 | * lpar doesn't use the passed actual page size | |
529 | */ | |
530 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); | |
27828f98 | 531 | return 0; |
f8c8803b BP |
532 | } |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
536 | * lock. | |
537 | */ | |
035223fb | 538 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 539 | { |
5524a27d | 540 | unsigned long vpn; |
f03e64f2 | 541 | unsigned long i, pix, rc; |
12e86f92 | 542 | unsigned long flags = 0; |
69111bac | 543 | struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch); |
44ae3ab3 | 544 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
05af40e8 | 545 | unsigned long param[PLPAR_HCALL9_BUFSIZE]; |
f03e64f2 PM |
546 | unsigned long hash, index, shift, hidx, slot; |
547 | real_pte_t pte; | |
1189be65 | 548 | int psize, ssize; |
1da177e4 LT |
549 | |
550 | if (lock_tlbie) | |
551 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
552 | ||
f03e64f2 | 553 | psize = batch->psize; |
1189be65 | 554 | ssize = batch->ssize; |
f03e64f2 PM |
555 | pix = 0; |
556 | for (i = 0; i < number; i++) { | |
5524a27d | 557 | vpn = batch->vpn[i]; |
f03e64f2 | 558 | pte = batch->pte[i]; |
5524a27d AK |
559 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
560 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
561 | hidx = __rpte_to_hidx(pte, index); |
562 | if (hidx & _PTEIDX_SECONDARY) | |
563 | hash = ~hash; | |
564 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
565 | slot += hidx & _PTEIDX_GROUP_IX; | |
12e86f92 | 566 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
db3d8534 AK |
567 | /* |
568 | * lpar doesn't use the passed actual page size | |
569 | */ | |
5524a27d | 570 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
db3d8534 | 571 | 0, ssize, local); |
12e86f92 PM |
572 | } else { |
573 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 574 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 575 | ssize); |
12e86f92 PM |
576 | pix += 2; |
577 | if (pix == 8) { | |
578 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
579 | param[0], param[1], param[2], |
580 | param[3], param[4], param[5], | |
581 | param[6], param[7]); | |
12e86f92 PM |
582 | BUG_ON(rc != H_SUCCESS); |
583 | pix = 0; | |
584 | } | |
f03e64f2 PM |
585 | } |
586 | } pte_iterate_hashed_end(); | |
587 | } | |
588 | if (pix) { | |
589 | param[pix] = HBR_END; | |
590 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
591 | param[2], param[3], param[4], param[5], | |
592 | param[6], param[7]); | |
593 | BUG_ON(rc != H_SUCCESS); | |
594 | } | |
1da177e4 LT |
595 | |
596 | if (lock_tlbie) | |
597 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
598 | } | |
599 | ||
4e89a2d8 WS |
600 | static int __init disable_bulk_remove(char *str) |
601 | { | |
602 | if (strcmp(str, "off") == 0 && | |
603 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
604 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); | |
605 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; | |
606 | } | |
607 | return 1; | |
608 | } | |
609 | ||
610 | __setup("bulk_remove=", disable_bulk_remove); | |
611 | ||
612b7949 PM |
612 | /* Actually only used for radix, so far */ |
613 | static int pseries_lpar_register_process_table(unsigned long base, | |
614 | unsigned long page_size, unsigned long table_size) | |
615 | { | |
616 | long rc; | |
617 | unsigned long flags = PROC_TABLE_NEW; | |
618 | ||
619 | if (radix_enabled()) | |
620 | flags |= PROC_TABLE_RADIX | PROC_TABLE_GTSE; | |
621 | for (;;) { | |
622 | rc = plpar_hcall_norets(H_REGISTER_PROC_TBL, flags, base, | |
623 | page_size, table_size); | |
624 | if (!H_IS_LONG_BUSY(rc)) | |
625 | break; | |
626 | mdelay(get_longbusy_msecs(rc)); | |
627 | } | |
628 | if (rc != H_SUCCESS) { | |
629 | pr_err("Failed to register process table (rc=%ld)\n", rc); | |
630 | BUG(); | |
631 | } | |
632 | return rc; | |
633 | } | |
634 | ||
6364e84e | 635 | void __init hpte_init_pseries(void) |
1da177e4 | 636 | { |
7025776e BH |
637 | mmu_hash_ops.hpte_invalidate = pSeries_lpar_hpte_invalidate; |
638 | mmu_hash_ops.hpte_updatepp = pSeries_lpar_hpte_updatepp; | |
639 | mmu_hash_ops.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; | |
640 | mmu_hash_ops.hpte_insert = pSeries_lpar_hpte_insert; | |
641 | mmu_hash_ops.hpte_remove = pSeries_lpar_hpte_remove; | |
642 | mmu_hash_ops.hpte_removebolted = pSeries_lpar_hpte_removebolted; | |
643 | mmu_hash_ops.flush_hash_range = pSeries_lpar_flush_hash_range; | |
5246adec | 644 | mmu_hash_ops.hpte_clear_all = pseries_hpte_clear_all; |
7025776e | 645 | mmu_hash_ops.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; |
1da177e4 | 646 | } |
14f966e7 | 647 | |
612b7949 PM |
648 | void radix_init_pseries(void) |
649 | { | |
650 | pr_info("Using radix MMU under hypervisor\n"); | |
651 | register_process_table = pseries_lpar_register_process_table; | |
652 | } | |
653 | ||
14f966e7 RJ |
654 | #ifdef CONFIG_PPC_SMLPAR |
655 | #define CMO_FREE_HINT_DEFAULT 1 | |
656 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
657 | ||
658 | static int __init cmo_free_hint(char *str) | |
659 | { | |
660 | char *parm; | |
661 | parm = strstrip(str); | |
662 | ||
663 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { | |
664 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); | |
665 | cmo_free_hint_flag = 0; | |
666 | return 1; | |
667 | } | |
668 | ||
669 | cmo_free_hint_flag = 1; | |
670 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); | |
671 | ||
672 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) | |
673 | return 1; | |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
678 | __setup("cmo_free_hint=", cmo_free_hint); | |
679 | ||
680 | static void pSeries_set_page_state(struct page *page, int order, | |
681 | unsigned long state) | |
682 | { | |
683 | int i, j; | |
684 | unsigned long cmo_page_sz, addr; | |
685 | ||
686 | cmo_page_sz = cmo_get_page_size(); | |
687 | addr = __pa((unsigned long)page_address(page)); | |
688 | ||
689 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { | |
690 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) | |
691 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); | |
692 | } | |
693 | } | |
694 | ||
695 | void arch_free_page(struct page *page, int order) | |
696 | { | |
d8c476ee AK |
697 | if (radix_enabled()) |
698 | return; | |
14f966e7 RJ |
699 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) |
700 | return; | |
701 | ||
702 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); | |
703 | } | |
704 | EXPORT_SYMBOL(arch_free_page); | |
705 | ||
d8c476ee AK |
706 | #endif /* CONFIG_PPC_SMLPAR */ |
707 | #endif /* CONFIG_PPC_STD_MMU_64 */ | |
c8cd093a AB |
708 | |
709 | #ifdef CONFIG_TRACEPOINTS | |
d4fe0965 | 710 | #ifdef HAVE_JUMP_LABEL |
cc1adb5f AB |
711 | struct static_key hcall_tracepoint_key = STATIC_KEY_INIT; |
712 | ||
8cf868af | 713 | int hcall_tracepoint_regfunc(void) |
cc1adb5f AB |
714 | { |
715 | static_key_slow_inc(&hcall_tracepoint_key); | |
8cf868af | 716 | return 0; |
cc1adb5f AB |
717 | } |
718 | ||
719 | void hcall_tracepoint_unregfunc(void) | |
720 | { | |
721 | static_key_slow_dec(&hcall_tracepoint_key); | |
722 | } | |
723 | #else | |
c8cd093a AB |
724 | /* |
725 | * We optimise our hcall path by placing hcall_tracepoint_refcount | |
726 | * directly in the TOC so we can check if the hcall tracepoints are | |
727 | * enabled via a single load. | |
728 | */ | |
729 | ||
730 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ | |
731 | extern long hcall_tracepoint_refcount; | |
732 | ||
8cf868af | 733 | int hcall_tracepoint_regfunc(void) |
c8cd093a AB |
734 | { |
735 | hcall_tracepoint_refcount++; | |
8cf868af | 736 | return 0; |
c8cd093a AB |
737 | } |
738 | ||
739 | void hcall_tracepoint_unregfunc(void) | |
740 | { | |
741 | hcall_tracepoint_refcount--; | |
742 | } | |
cc1adb5f AB |
743 | #endif |
744 | ||
745 | /* | |
746 | * Since the tracing code might execute hcalls we need to guard against | |
747 | * recursion. One example of this are spinlocks calling H_YIELD on | |
748 | * shared processor partitions. | |
749 | */ | |
750 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
751 | ||
c8cd093a | 752 | |
6f26353c | 753 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 754 | { |
57cdfdf8 AB |
755 | unsigned long flags; |
756 | unsigned int *depth; | |
757 | ||
a5ccfee0 AB |
758 | /* |
759 | * We cannot call tracepoints inside RCU idle regions which | |
760 | * means we must not trace H_CEDE. | |
761 | */ | |
762 | if (opcode == H_CEDE) | |
763 | return; | |
764 | ||
57cdfdf8 AB |
765 | local_irq_save(flags); |
766 | ||
69111bac | 767 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
768 | |
769 | if (*depth) | |
770 | goto out; | |
771 | ||
772 | (*depth)++; | |
e4f387d8 | 773 | preempt_disable(); |
6f26353c | 774 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
775 | (*depth)--; |
776 | ||
777 | out: | |
778 | local_irq_restore(flags); | |
c8cd093a AB |
779 | } |
780 | ||
6f26353c AB |
781 | void __trace_hcall_exit(long opcode, unsigned long retval, |
782 | unsigned long *retbuf) | |
c8cd093a | 783 | { |
57cdfdf8 AB |
784 | unsigned long flags; |
785 | unsigned int *depth; | |
786 | ||
a5ccfee0 AB |
787 | if (opcode == H_CEDE) |
788 | return; | |
789 | ||
57cdfdf8 AB |
790 | local_irq_save(flags); |
791 | ||
69111bac | 792 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
793 | |
794 | if (*depth) | |
795 | goto out; | |
796 | ||
797 | (*depth)++; | |
6f26353c | 798 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 799 | preempt_enable(); |
57cdfdf8 AB |
800 | (*depth)--; |
801 | ||
802 | out: | |
803 | local_irq_restore(flags); | |
c8cd093a AB |
804 | } |
805 | #endif | |
9ee820fa BK |
806 | |
807 | /** | |
808 | * h_get_mpp | |
809 | * H_GET_MPP hcall returns info in 7 parms | |
810 | */ | |
811 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
812 | { | |
813 | int rc; | |
814 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
815 | ||
816 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
817 | ||
818 | mpp_data->entitled_mem = retbuf[0]; | |
819 | mpp_data->mapped_mem = retbuf[1]; | |
820 | ||
821 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
822 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
823 | ||
824 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
825 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
b0d436c7 | 826 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL; |
9ee820fa BK |
827 | |
828 | mpp_data->pool_size = retbuf[4]; | |
829 | mpp_data->loan_request = retbuf[5]; | |
830 | mpp_data->backing_mem = retbuf[6]; | |
831 | ||
832 | return rc; | |
833 | } | |
834 | EXPORT_SYMBOL(h_get_mpp); | |
835 | ||
836 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) | |
837 | { | |
838 | int rc; | |
839 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; | |
840 | ||
841 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); | |
842 | ||
843 | mpp_x_data->coalesced_bytes = retbuf[0]; | |
844 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; | |
845 | mpp_x_data->pool_purr_cycles = retbuf[2]; | |
846 | mpp_x_data->pool_spurr_cycles = retbuf[3]; | |
847 | ||
848 | return rc; | |
849 | } |