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 | |
1da177e4 | 48 | |
b9377ffc | 49 | /* in hvCall.S */ |
1da177e4 | 50 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 51 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 52 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 53 | |
1da177e4 LT |
54 | extern void pSeries_find_serial_port(void); |
55 | ||
1da177e4 LT |
56 | void vpa_init(int cpu) |
57 | { | |
58 | int hwcpu = get_hard_smp_processor_id(cpu); | |
2f6093c8 | 59 | unsigned long addr; |
1da177e4 | 60 | long ret; |
cf9efce0 PM |
61 | struct paca_struct *pp; |
62 | struct dtl_entry *dtl; | |
233ccd0d OJ |
63 | |
64 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
8154c5d2 | 65 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 66 | |
8154c5d2 | 67 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 68 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 69 | |
2f6093c8 | 70 | if (ret) { |
711ef84e AB |
71 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
72 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
73 | return; |
74 | } | |
75 | /* | |
76 | * PAPR says this feature is SLB-Buffer but firmware never | |
77 | * reports that. All SPLPAR support SLB shadow buffer. | |
78 | */ | |
79 | addr = __pa(&slb_shadow[cpu]); | |
80 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { | |
81 | ret = register_slb_shadow(hwcpu, addr); | |
82 | if (ret) | |
711ef84e AB |
83 | pr_err("WARNING: SLB shadow buffer registration for " |
84 | "cpu %d (hw %d) of area %lx failed with %ld\n", | |
85 | cpu, hwcpu, addr, ret); | |
2f6093c8 | 86 | } |
cf9efce0 PM |
87 | |
88 | /* | |
89 | * Register dispatch trace log, if one has been allocated. | |
90 | */ | |
91 | pp = &paca[cpu]; | |
92 | dtl = pp->dispatch_log; | |
93 | if (dtl) { | |
94 | pp->dtl_ridx = 0; | |
95 | pp->dtl_curr = dtl; | |
96 | lppaca_of(cpu).dtl_idx = 0; | |
97 | ||
98 | /* hypervisor reads buffer length from this field */ | |
99 | dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES; | |
100 | ret = register_dtl(hwcpu, __pa(dtl)); | |
101 | if (ret) | |
711ef84e AB |
102 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
103 | "failed with %ld\n", smp_processor_id(), | |
104 | hwcpu, ret); | |
cf9efce0 PM |
105 | lppaca_of(cpu).dtl_enable_mask = 2; |
106 | } | |
1da177e4 LT |
107 | } |
108 | ||
035223fb | 109 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
110 | unsigned long vpn, unsigned long pa, |
111 | unsigned long rflags, unsigned long vflags, | |
112 | int psize, int ssize) | |
1da177e4 | 113 | { |
1da177e4 LT |
114 | unsigned long lpar_rc; |
115 | unsigned long flags; | |
116 | unsigned long slot; | |
96e28449 | 117 | unsigned long hpte_v, hpte_r; |
1da177e4 | 118 | |
3c726f8d | 119 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
120 | pr_devel("hpte_insert(group=%lx, vpn=%016lx, " |
121 | "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", | |
122 | hpte_group, vpn, pa, rflags, vflags, psize); | |
3c726f8d | 123 | |
5524a27d | 124 | hpte_v = hpte_encode_v(vpn, psize, ssize) | vflags | HPTE_V_VALID; |
3c726f8d BH |
125 | hpte_r = hpte_encode_r(pa, psize) | rflags; |
126 | ||
127 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 128 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 129 | |
1da177e4 LT |
130 | /* Now fill in the actual HPTE */ |
131 | /* Set CEC cookie to 0 */ | |
132 | /* Zero page = 0 */ | |
133 | /* I-cache Invalidate = 0 */ | |
134 | /* I-cache synchronize = 0 */ | |
135 | /* Exact = 0 */ | |
136 | flags = 0; | |
137 | ||
3c726f8d | 138 | /* Make pHyp happy */ |
443dcac4 | 139 | if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)) |
96e28449 | 140 | hpte_r &= ~_PAGE_COHERENT; |
9ee820fa BK |
141 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
142 | flags |= H_COALESCE_CAND; | |
1da177e4 | 143 | |
b9377ffc | 144 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 145 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 146 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 147 | pr_devel(" full\n"); |
1da177e4 | 148 | return -1; |
3c726f8d | 149 | } |
1da177e4 LT |
150 | |
151 | /* | |
152 | * Since we try and ioremap PHBs we don't own, the pte insert | |
153 | * will fail. However we must catch the failure in hash_page | |
154 | * or we will loop forever, so return -2 in this case. | |
155 | */ | |
706c8c93 | 156 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 157 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 158 | pr_devel(" lpar err %lu\n", lpar_rc); |
1da177e4 | 159 | return -2; |
3c726f8d BH |
160 | } |
161 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 162 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
163 | |
164 | /* Because of iSeries, we have to pass down the secondary | |
165 | * bucket bit here as well | |
166 | */ | |
96e28449 | 167 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
168 | } |
169 | ||
170 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
171 | ||
172 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) | |
173 | { | |
174 | unsigned long slot_offset; | |
175 | unsigned long lpar_rc; | |
176 | int i; | |
177 | unsigned long dummy1, dummy2; | |
178 | ||
179 | /* pick a random slot to start at */ | |
180 | slot_offset = mftb() & 0x7; | |
181 | ||
182 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
183 | ||
184 | /* don't remove a bolted entry */ | |
185 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, | |
186 | (0x1UL << 4), &dummy1, &dummy2); | |
706c8c93 | 187 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 188 | return i; |
706c8c93 | 189 | BUG_ON(lpar_rc != H_NOT_FOUND); |
1da177e4 LT |
190 | |
191 | slot_offset++; | |
192 | slot_offset &= 0x7; | |
193 | } | |
194 | ||
195 | return -1; | |
196 | } | |
197 | ||
198 | static void pSeries_lpar_hptab_clear(void) | |
199 | { | |
200 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
201 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
202 | struct { |
203 | unsigned long pteh; | |
204 | unsigned long ptel; | |
205 | } ptes[4]; | |
b7abc5c5 | 206 | long lpar_rc; |
bed9a315 | 207 | unsigned long i, j; |
d504bed6 MN |
208 | |
209 | /* Read in batches of 4, | |
210 | * invalidate only valid entries not in the VRMA | |
211 | * hpte_count will be a multiple of 4 | |
212 | */ | |
213 | for (i = 0; i < hpte_count; i += 4) { | |
214 | lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); | |
215 | if (lpar_rc != H_SUCCESS) | |
216 | continue; | |
217 | for (j = 0; j < 4; j++){ | |
218 | if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == | |
219 | HPTE_V_VRMA_MASK) | |
220 | continue; | |
221 | if (ptes[j].pteh & HPTE_V_VALID) | |
222 | plpar_pte_remove_raw(0, i + j, 0, | |
223 | &(ptes[j].pteh), &(ptes[j].ptel)); | |
b7abc5c5 SS |
224 | } |
225 | } | |
1da177e4 LT |
226 | } |
227 | ||
228 | /* | |
229 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and | |
230 | * the low 3 bits of flags happen to line up. So no transform is needed. | |
231 | * We can probably optimize here and assume the high bits of newpp are | |
232 | * already zero. For now I am paranoid. | |
233 | */ | |
3c726f8d BH |
234 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
235 | unsigned long newpp, | |
5524a27d | 236 | unsigned long vpn, |
1189be65 | 237 | int psize, int ssize, int local) |
1da177e4 LT |
238 | { |
239 | unsigned long lpar_rc; | |
240 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 241 | unsigned long want_v; |
1da177e4 | 242 | |
5524a27d | 243 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 244 | |
551a232c | 245 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 246 | want_v, slot, flags, psize); |
1da177e4 | 247 | |
1189be65 | 248 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 249 | |
706c8c93 | 250 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 251 | pr_devel("not found !\n"); |
1da177e4 | 252 | return -1; |
3c726f8d BH |
253 | } |
254 | ||
551a232c | 255 | pr_devel("ok\n"); |
1da177e4 | 256 | |
706c8c93 | 257 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
258 | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) | |
263 | { | |
264 | unsigned long dword0; | |
265 | unsigned long lpar_rc; | |
266 | unsigned long dummy_word1; | |
267 | unsigned long flags; | |
268 | ||
269 | /* Read 1 pte at a time */ | |
270 | /* Do not need RPN to logical page translation */ | |
271 | /* No cross CEC PFT access */ | |
272 | flags = 0; | |
273 | ||
274 | lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); | |
275 | ||
706c8c93 | 276 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
277 | |
278 | return dword0; | |
279 | } | |
280 | ||
5524a27d | 281 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 LT |
282 | { |
283 | unsigned long hash; | |
1189be65 | 284 | unsigned long i; |
1da177e4 | 285 | long slot; |
3c726f8d | 286 | unsigned long want_v, hpte_v; |
1da177e4 | 287 | |
5524a27d AK |
288 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
289 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
290 | |
291 | /* Bolted entries are always in the primary group */ | |
292 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
293 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
294 | hpte_v = pSeries_lpar_hpte_getword0(slot); | |
295 | ||
296 | if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) | |
297 | /* HPTE matches */ | |
298 | return slot; | |
299 | ++slot; | |
1da177e4 LT |
300 | } |
301 | ||
302 | return -1; | |
303 | } | |
304 | ||
305 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 306 | unsigned long ea, |
1189be65 | 307 | int psize, int ssize) |
1da177e4 | 308 | { |
5524a27d AK |
309 | unsigned long vpn; |
310 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 311 | |
1189be65 | 312 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 313 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 314 | |
5524a27d | 315 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
316 | BUG_ON(slot == -1); |
317 | ||
318 | flags = newpp & 7; | |
319 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
320 | ||
706c8c93 | 321 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
322 | } |
323 | ||
5524a27d | 324 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
1189be65 | 325 | int psize, int ssize, int local) |
1da177e4 | 326 | { |
3c726f8d | 327 | unsigned long want_v; |
1da177e4 LT |
328 | unsigned long lpar_rc; |
329 | unsigned long dummy1, dummy2; | |
330 | ||
5524a27d AK |
331 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
332 | slot, vpn, psize, local); | |
1da177e4 | 333 | |
5524a27d | 334 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 335 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 336 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
337 | return; |
338 | ||
706c8c93 | 339 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
340 | } |
341 | ||
f8c8803b BP |
342 | static void pSeries_lpar_hpte_removebolted(unsigned long ea, |
343 | int psize, int ssize) | |
344 | { | |
5524a27d AK |
345 | unsigned long vpn; |
346 | unsigned long slot, vsid; | |
f8c8803b BP |
347 | |
348 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 349 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 350 | |
5524a27d | 351 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
f8c8803b BP |
352 | BUG_ON(slot == -1); |
353 | ||
5524a27d | 354 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, ssize, 0); |
f8c8803b BP |
355 | } |
356 | ||
f03e64f2 PM |
357 | /* Flag bits for H_BULK_REMOVE */ |
358 | #define HBR_REQUEST 0x4000000000000000UL | |
359 | #define HBR_RESPONSE 0x8000000000000000UL | |
360 | #define HBR_END 0xc000000000000000UL | |
361 | #define HBR_AVPN 0x0200000000000000UL | |
362 | #define HBR_ANDCOND 0x0100000000000000UL | |
363 | ||
1da177e4 LT |
364 | /* |
365 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
366 | * lock. | |
367 | */ | |
035223fb | 368 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 369 | { |
5524a27d | 370 | unsigned long vpn; |
f03e64f2 | 371 | unsigned long i, pix, rc; |
12e86f92 | 372 | unsigned long flags = 0; |
1da177e4 | 373 | struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); |
44ae3ab3 | 374 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
f03e64f2 | 375 | unsigned long param[9]; |
f03e64f2 PM |
376 | unsigned long hash, index, shift, hidx, slot; |
377 | real_pte_t pte; | |
1189be65 | 378 | int psize, ssize; |
1da177e4 LT |
379 | |
380 | if (lock_tlbie) | |
381 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
382 | ||
f03e64f2 | 383 | psize = batch->psize; |
1189be65 | 384 | ssize = batch->ssize; |
f03e64f2 PM |
385 | pix = 0; |
386 | for (i = 0; i < number; i++) { | |
5524a27d | 387 | vpn = batch->vpn[i]; |
f03e64f2 | 388 | pte = batch->pte[i]; |
5524a27d AK |
389 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
390 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
391 | hidx = __rpte_to_hidx(pte, index); |
392 | if (hidx & _PTEIDX_SECONDARY) | |
393 | hash = ~hash; | |
394 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
395 | slot += hidx & _PTEIDX_GROUP_IX; | |
12e86f92 | 396 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
5524a27d | 397 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
1189be65 | 398 | ssize, local); |
12e86f92 PM |
399 | } else { |
400 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 401 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 402 | ssize); |
12e86f92 PM |
403 | pix += 2; |
404 | if (pix == 8) { | |
405 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
406 | param[0], param[1], param[2], |
407 | param[3], param[4], param[5], | |
408 | param[6], param[7]); | |
12e86f92 PM |
409 | BUG_ON(rc != H_SUCCESS); |
410 | pix = 0; | |
411 | } | |
f03e64f2 PM |
412 | } |
413 | } pte_iterate_hashed_end(); | |
414 | } | |
415 | if (pix) { | |
416 | param[pix] = HBR_END; | |
417 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
418 | param[2], param[3], param[4], param[5], | |
419 | param[6], param[7]); | |
420 | BUG_ON(rc != H_SUCCESS); | |
421 | } | |
1da177e4 LT |
422 | |
423 | if (lock_tlbie) | |
424 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
425 | } | |
426 | ||
4e89a2d8 WS |
427 | static int __init disable_bulk_remove(char *str) |
428 | { | |
429 | if (strcmp(str, "off") == 0 && | |
430 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
431 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); | |
432 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; | |
433 | } | |
434 | return 1; | |
435 | } | |
436 | ||
437 | __setup("bulk_remove=", disable_bulk_remove); | |
438 | ||
7d0daae4 | 439 | void __init hpte_init_lpar(void) |
1da177e4 LT |
440 | { |
441 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; | |
442 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; | |
443 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; | |
444 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; | |
445 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; | |
f8c8803b | 446 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
1da177e4 LT |
447 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
448 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; | |
1da177e4 | 449 | } |
14f966e7 RJ |
450 | |
451 | #ifdef CONFIG_PPC_SMLPAR | |
452 | #define CMO_FREE_HINT_DEFAULT 1 | |
453 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
454 | ||
455 | static int __init cmo_free_hint(char *str) | |
456 | { | |
457 | char *parm; | |
458 | parm = strstrip(str); | |
459 | ||
460 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { | |
461 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); | |
462 | cmo_free_hint_flag = 0; | |
463 | return 1; | |
464 | } | |
465 | ||
466 | cmo_free_hint_flag = 1; | |
467 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); | |
468 | ||
469 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) | |
470 | return 1; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | __setup("cmo_free_hint=", cmo_free_hint); | |
476 | ||
477 | static void pSeries_set_page_state(struct page *page, int order, | |
478 | unsigned long state) | |
479 | { | |
480 | int i, j; | |
481 | unsigned long cmo_page_sz, addr; | |
482 | ||
483 | cmo_page_sz = cmo_get_page_size(); | |
484 | addr = __pa((unsigned long)page_address(page)); | |
485 | ||
486 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { | |
487 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) | |
488 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); | |
489 | } | |
490 | } | |
491 | ||
492 | void arch_free_page(struct page *page, int order) | |
493 | { | |
494 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) | |
495 | return; | |
496 | ||
497 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); | |
498 | } | |
499 | EXPORT_SYMBOL(arch_free_page); | |
500 | ||
501 | #endif | |
c8cd093a AB |
502 | |
503 | #ifdef CONFIG_TRACEPOINTS | |
504 | /* | |
505 | * We optimise our hcall path by placing hcall_tracepoint_refcount | |
506 | * directly in the TOC so we can check if the hcall tracepoints are | |
507 | * enabled via a single load. | |
508 | */ | |
509 | ||
510 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ | |
511 | extern long hcall_tracepoint_refcount; | |
512 | ||
57cdfdf8 AB |
513 | /* |
514 | * Since the tracing code might execute hcalls we need to guard against | |
515 | * recursion. One example of this are spinlocks calling H_YIELD on | |
516 | * shared processor partitions. | |
517 | */ | |
518 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
519 | ||
c8cd093a AB |
520 | void hcall_tracepoint_regfunc(void) |
521 | { | |
522 | hcall_tracepoint_refcount++; | |
523 | } | |
524 | ||
525 | void hcall_tracepoint_unregfunc(void) | |
526 | { | |
527 | hcall_tracepoint_refcount--; | |
528 | } | |
529 | ||
6f26353c | 530 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 531 | { |
57cdfdf8 AB |
532 | unsigned long flags; |
533 | unsigned int *depth; | |
534 | ||
a5ccfee0 AB |
535 | /* |
536 | * We cannot call tracepoints inside RCU idle regions which | |
537 | * means we must not trace H_CEDE. | |
538 | */ | |
539 | if (opcode == H_CEDE) | |
540 | return; | |
541 | ||
57cdfdf8 AB |
542 | local_irq_save(flags); |
543 | ||
544 | depth = &__get_cpu_var(hcall_trace_depth); | |
545 | ||
546 | if (*depth) | |
547 | goto out; | |
548 | ||
549 | (*depth)++; | |
e4f387d8 | 550 | preempt_disable(); |
6f26353c | 551 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
552 | (*depth)--; |
553 | ||
554 | out: | |
555 | local_irq_restore(flags); | |
c8cd093a AB |
556 | } |
557 | ||
6f26353c AB |
558 | void __trace_hcall_exit(long opcode, unsigned long retval, |
559 | unsigned long *retbuf) | |
c8cd093a | 560 | { |
57cdfdf8 AB |
561 | unsigned long flags; |
562 | unsigned int *depth; | |
563 | ||
a5ccfee0 AB |
564 | if (opcode == H_CEDE) |
565 | return; | |
566 | ||
57cdfdf8 AB |
567 | local_irq_save(flags); |
568 | ||
569 | depth = &__get_cpu_var(hcall_trace_depth); | |
570 | ||
571 | if (*depth) | |
572 | goto out; | |
573 | ||
574 | (*depth)++; | |
6f26353c | 575 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 576 | preempt_enable(); |
57cdfdf8 AB |
577 | (*depth)--; |
578 | ||
579 | out: | |
580 | local_irq_restore(flags); | |
c8cd093a AB |
581 | } |
582 | #endif | |
9ee820fa BK |
583 | |
584 | /** | |
585 | * h_get_mpp | |
586 | * H_GET_MPP hcall returns info in 7 parms | |
587 | */ | |
588 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
589 | { | |
590 | int rc; | |
591 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
592 | ||
593 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
594 | ||
595 | mpp_data->entitled_mem = retbuf[0]; | |
596 | mpp_data->mapped_mem = retbuf[1]; | |
597 | ||
598 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
599 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
600 | ||
601 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
602 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
603 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff; | |
604 | ||
605 | mpp_data->pool_size = retbuf[4]; | |
606 | mpp_data->loan_request = retbuf[5]; | |
607 | mpp_data->backing_mem = retbuf[6]; | |
608 | ||
609 | return rc; | |
610 | } | |
611 | EXPORT_SYMBOL(h_get_mpp); | |
612 | ||
613 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) | |
614 | { | |
615 | int rc; | |
616 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; | |
617 | ||
618 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); | |
619 | ||
620 | mpp_x_data->coalesced_bytes = retbuf[0]; | |
621 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; | |
622 | mpp_x_data->pool_purr_cycles = retbuf[2]; | |
623 | mpp_x_data->pool_spurr_cycles = retbuf[3]; | |
624 | ||
625 | return rc; | |
626 | } |