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iwlwifi: don't include iwl-dev.h from iwl-devtrace.h
[deliverable/linux.git] / arch / powerpc / kvm / e500_tlb.c
CommitLineData
bc8080cb
HB		 1/*
2 * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
3 *
4 * Author: Yu Liu, yu.liu@freescale.com
5 *
6 * Description:
7 * This file is based on arch/powerpc/kvm/44x_tlb.c,
8 * by Hollis Blanchard <hollisb@us.ibm.com>.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License, version 2, as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/types.h>
16#include <linux/string.h>
17#include <linux/kvm.h>
18#include <linux/kvm_host.h>
19#include <linux/highmem.h>
20#include <asm/kvm_ppc.h>
21#include <asm/kvm_e500.h>
22
9aa4dd5e 23#include "../mm/mmu_decl.h"
bc8080cb 24#include "e500_tlb.h"
46f43c6e 25#include "trace.h"
bc8080cb
HB		 26
27#define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1)
28
29static unsigned int tlb1_entry_num;
30
31void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
32{
33 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
34 struct tlbe *tlbe;
35 int i, tlbsel;
36
37 printk("| %8s | %8s | %8s | %8s | %8s |\n",
38 "nr", "mas1", "mas2", "mas3", "mas7");
39
40 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
41 printk("Guest TLB%d:\n", tlbsel);
42 for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
43 tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
44 if (tlbe->mas1 & MAS1_VALID)
45 printk(" G[%d][%3d] | %08X | %08X | %08X | %08X |\n",
46 tlbsel, i, tlbe->mas1, tlbe->mas2,
47 tlbe->mas3, tlbe->mas7);
48 }
49 }
50
51 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
52 printk("Shadow TLB%d:\n", tlbsel);
53 for (i = 0; i < vcpu_e500->shadow_tlb_size[tlbsel]; i++) {
54 tlbe = &vcpu_e500->shadow_tlb[tlbsel][i];
55 if (tlbe->mas1 & MAS1_VALID)
56 printk(" S[%d][%3d] | %08X | %08X | %08X | %08X |\n",
57 tlbsel, i, tlbe->mas1, tlbe->mas2,
58 tlbe->mas3, tlbe->mas7);
59 }
60 }
61}
62
63static inline unsigned int tlb0_get_next_victim(
64 struct kvmppc_vcpu_e500 *vcpu_e500)
65{
66 unsigned int victim;
67
68 victim = vcpu_e500->guest_tlb_nv[0]++;
69 if (unlikely(vcpu_e500->guest_tlb_nv[0] >= KVM_E500_TLB0_WAY_NUM))
70 vcpu_e500->guest_tlb_nv[0] = 0;
71
72 return victim;
73}
74
75static inline unsigned int tlb1_max_shadow_size(void)
76{
77 return tlb1_entry_num - tlbcam_index;
78}
79
80static inline int tlbe_is_writable(struct tlbe *tlbe)
81{
82 return tlbe->mas3 & (MAS3_SW|MAS3_UW);
83}
84
85static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)
86{
87 /* Mask off reserved bits. */
88 mas3 &= MAS3_ATTRIB_MASK;
89
90 if (!usermode) {
91 /* Guest is in supervisor mode,
92 * so we need to translate guest
93 * supervisor permissions into user permissions. */
94 mas3 &= ~E500_TLB_USER_PERM_MASK;
95 mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;
96 }
97
98 return mas3 | E500_TLB_SUPER_PERM_MASK;
99}
100
101static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)
102{
046a48b3
LY		 103#ifdef CONFIG_SMP
104 return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;
105#else
bc8080cb 106 return mas2 & MAS2_ATTRIB_MASK;
046a48b3 107#endif
bc8080cb
HB		 108}
109
110/*
111 * writing shadow tlb entry to host TLB
112 */
113static inline void __write_host_tlbe(struct tlbe *stlbe)
114{
115 mtspr(SPRN_MAS1, stlbe->mas1);
116 mtspr(SPRN_MAS2, stlbe->mas2);
117 mtspr(SPRN_MAS3, stlbe->mas3);
118 mtspr(SPRN_MAS7, stlbe->mas7);
119 __asm__ __volatile__ ("tlbwe\n" : : );
120}
121
122static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
123 int tlbsel, int esel)
124{
125 struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
126
127 local_irq_disable();
128 if (tlbsel == 0) {
129 __write_host_tlbe(stlbe);
130 } else {
131 unsigned register mas0;
132
133 mas0 = mfspr(SPRN_MAS0);
134
135 mtspr(SPRN_MAS0, MAS0_TLBSEL(1) | MAS0_ESEL(to_htlb1_esel(esel)));
136 __write_host_tlbe(stlbe);
137
138 mtspr(SPRN_MAS0, mas0);
139 }
140 local_irq_enable();
141}
142
143void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu)
144{
145 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
146 int i;
147 unsigned register mas0;
148
149 /* Load all valid TLB1 entries to reduce guest tlb miss fault */
150 local_irq_disable();
151 mas0 = mfspr(SPRN_MAS0);
152 for (i = 0; i < tlb1_max_shadow_size(); i++) {
153 struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
154
155 if (get_tlb_v(stlbe)) {
156 mtspr(SPRN_MAS0, MAS0_TLBSEL(1)
157 | MAS0_ESEL(to_htlb1_esel(i)));
158 __write_host_tlbe(stlbe);
159 }
160 }
161 mtspr(SPRN_MAS0, mas0);
162 local_irq_enable();
163}
164
165void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu)
166{
9aa4dd5e 167 _tlbil_all();
bc8080cb
HB		 168}
169
170/* Search the guest TLB for a matching entry. */
171static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
172 gva_t eaddr, int tlbsel, unsigned int pid, int as)
173{
174 int i;
175
176 /* XXX Replace loop with fancy data structures. */
177 for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
178 struct tlbe *tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
179 unsigned int tid;
180
181 if (eaddr < get_tlb_eaddr(tlbe))
182 continue;
183
184 if (eaddr > get_tlb_end(tlbe))
185 continue;
186
187 tid = get_tlb_tid(tlbe);
188 if (tid && (tid != pid))
189 continue;
190
191 if (!get_tlb_v(tlbe))
192 continue;
193
194 if (get_tlb_ts(tlbe) != as && as != -1)
195 continue;
196
197 return i;
198 }
199
200 return -1;
201}
202
203static void kvmppc_e500_shadow_release(struct kvmppc_vcpu_e500 *vcpu_e500,
204 int tlbsel, int esel)
205{
206 struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
207 struct page *page = vcpu_e500->shadow_pages[tlbsel][esel];
208
209 if (page) {
210 vcpu_e500->shadow_pages[tlbsel][esel] = NULL;
211
212 if (get_tlb_v(stlbe)) {
213 if (tlbe_is_writable(stlbe))
214 kvm_release_page_dirty(page);
215 else
216 kvm_release_page_clean(page);
217 }
218 }
219}
220
221static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
222 int tlbsel, int esel)
223{
224 struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
225
226 kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
227 stlbe->mas1 = 0;
46f43c6e
MT		 228 trace_kvm_stlb_inval(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2,
229 stlbe->mas3, stlbe->mas7);
bc8080cb
HB		 230}
231
232static void kvmppc_e500_tlb1_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
233 gva_t eaddr, gva_t eend, u32 tid)
234{
235 unsigned int pid = tid & 0xff;
236 unsigned int i;
237
238 /* XXX Replace loop with fancy data structures. */
239 for (i = 0; i < vcpu_e500->guest_tlb_size[1]; i++) {
240 struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
241 unsigned int tid;
242
243 if (!get_tlb_v(stlbe))
244 continue;
245
246 if (eend < get_tlb_eaddr(stlbe))
247 continue;
248
249 if (eaddr > get_tlb_end(stlbe))
250 continue;
251
252 tid = get_tlb_tid(stlbe);
253 if (tid && (tid != pid))
254 continue;
255
256 kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
257 write_host_tlbe(vcpu_e500, 1, i);
258 }
259}
260
261static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
262 unsigned int eaddr, int as)
263{
264 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
265 unsigned int victim, pidsel, tsized;
266 int tlbsel;
267
fb2838d4 268 /* since we only have two TLBs, only lower bit is used. */
bc8080cb
HB		 269 tlbsel = (vcpu_e500->mas4 >> 28) & 0x1;
270 victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
271 pidsel = (vcpu_e500->mas4 >> 16) & 0xf;
0cfb50e5 272 tsized = (vcpu_e500->mas4 >> 7) & 0x1f;
bc8080cb
HB		 273
274 vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
275 | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
276 vcpu_e500->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
277 | MAS1_TID(vcpu_e500->pid[pidsel])
278 | MAS1_TSIZE(tsized);
279 vcpu_e500->mas2 = (eaddr & MAS2_EPN)
280 | (vcpu_e500->mas4 & MAS2_ATTRIB_MASK);
281 vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
282 vcpu_e500->mas6 = (vcpu_e500->mas6 & MAS6_SPID1)
283 | (get_cur_pid(vcpu) << 16)
284 | (as ? MAS6_SAS : 0);
285 vcpu_e500->mas7 = 0;
286}
287
288static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
289 u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe, int tlbsel, int esel)
290{
291 struct page *new_page;
292 struct tlbe *stlbe;
293 hpa_t hpaddr;
294
295 stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
296
297 /* Get reference to new page. */
298 new_page = gfn_to_page(vcpu_e500->vcpu.kvm, gfn);
299 if (is_error_page(new_page)) {
300 printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n", gfn);
301 kvm_release_page_clean(new_page);
302 return;
303 }
304 hpaddr = page_to_phys(new_page);
305
306 /* Drop reference to old page. */
307 kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
308
309 vcpu_e500->shadow_pages[tlbsel][esel] = new_page;
310
311 /* Force TS=1 IPROT=0 TSIZE=4KB for all guest mappings. */
0cfb50e5 312 stlbe->mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K)
bc8080cb
HB		 313 | MAS1_TID(get_tlb_tid(gtlbe)) | MAS1_TS | MAS1_VALID;
314 stlbe->mas2 = (gvaddr & MAS2_EPN)
315 | e500_shadow_mas2_attrib(gtlbe->mas2,
316 vcpu_e500->vcpu.arch.msr & MSR_PR);
317 stlbe->mas3 = (hpaddr & MAS3_RPN)
318 | e500_shadow_mas3_attrib(gtlbe->mas3,
319 vcpu_e500->vcpu.arch.msr & MSR_PR);
320 stlbe->mas7 = (hpaddr >> 32) & MAS7_RPN;
321
46f43c6e
MT		 322 trace_kvm_stlb_write(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2,
323 stlbe->mas3, stlbe->mas7);
bc8080cb
HB		 324}
325
326/* XXX only map the one-one case, for now use TLB0 */
327static int kvmppc_e500_stlbe_map(struct kvmppc_vcpu_e500 *vcpu_e500,
328 int tlbsel, int esel)
329{
330 struct tlbe *gtlbe;
331
332 gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
333
334 kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),
335 get_tlb_raddr(gtlbe) >> PAGE_SHIFT,
336 gtlbe, tlbsel, esel);
337
338 return esel;
339}
340
341/* Caller must ensure that the specified guest TLB entry is safe to insert into
342 * the shadow TLB. */
343/* XXX for both one-one and one-to-many , for now use TLB1 */
344static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
345 u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe)
346{
347 unsigned int victim;
348
349 victim = vcpu_e500->guest_tlb_nv[1]++;
350
351 if (unlikely(vcpu_e500->guest_tlb_nv[1] >= tlb1_max_shadow_size()))
352 vcpu_e500->guest_tlb_nv[1] = 0;
353
354 kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, victim);
355
356 return victim;
357}
358
359/* Invalidate all guest kernel mappings when enter usermode,
360 * so that when they fault back in they will get the
361 * proper permission bits. */
362void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
363{
364 if (usermode) {
365 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
366 int i;
367
368 /* XXX Replace loop with fancy data structures. */
bc8080cb
HB		 369 for (i = 0; i < tlb1_max_shadow_size(); i++)
370 kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
371
9aa4dd5e 372 _tlbil_all();
bc8080cb
HB		 373 }
374}
375
376static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
377 int tlbsel, int esel)
378{
379 struct tlbe *gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
380
381 if (unlikely(get_tlb_iprot(gtlbe)))
382 return -1;
383
384 if (tlbsel == 1) {
385 kvmppc_e500_tlb1_invalidate(vcpu_e500, get_tlb_eaddr(gtlbe),
386 get_tlb_end(gtlbe),
387 get_tlb_tid(gtlbe));
388 } else {
389 kvmppc_e500_stlbe_invalidate(vcpu_e500, tlbsel, esel);
390 }
391
392 gtlbe->mas1 = 0;
393
394 return 0;
395}
396
b0a1835d
LY		 397int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
398{
399 int esel;
400
401 if (value & MMUCSR0_TLB0FI)
402 for (esel = 0; esel < vcpu_e500->guest_tlb_size[0]; esel++)
403 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
404 if (value & MMUCSR0_TLB1FI)
405 for (esel = 0; esel < vcpu_e500->guest_tlb_size[1]; esel++)
406 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
407
408 _tlbil_all();
409
410 return EMULATE_DONE;
411}
412
bc8080cb
HB		 413int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
414{
415 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
416 unsigned int ia;
417 int esel, tlbsel;
418 gva_t ea;
419
8e5b26b5 420 ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb);
bc8080cb
HB		 421
422 ia = (ea >> 2) & 0x1;
423
fb2838d4 424 /* since we only have two TLBs, only lower bit is used. */
bc8080cb
HB		 425 tlbsel = (ea >> 3) & 0x1;
426
427 if (ia) {
428 /* invalidate all entries */
429 for (esel = 0; esel < vcpu_e500->guest_tlb_size[tlbsel]; esel++)
430 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
431 } else {
432 ea &= 0xfffff000;
433 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
434 get_cur_pid(vcpu), -1);
435 if (esel >= 0)
436 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
437 }
438
9aa4dd5e 439 _tlbil_all();
bc8080cb
HB		 440
441 return EMULATE_DONE;
442}
443
444int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
445{
446 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
447 int tlbsel, esel;
448 struct tlbe *gtlbe;
449
450 tlbsel = get_tlb_tlbsel(vcpu_e500);
451 esel = get_tlb_esel(vcpu_e500, tlbsel);
452
453 gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
bc35cbc8 454 vcpu_e500->mas0 &= ~MAS0_NV(~0);
bc8080cb
HB		 455 vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
456 vcpu_e500->mas1 = gtlbe->mas1;
457 vcpu_e500->mas2 = gtlbe->mas2;
458 vcpu_e500->mas3 = gtlbe->mas3;
459 vcpu_e500->mas7 = gtlbe->mas7;
460
461 return EMULATE_DONE;
462}
463
464int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
465{
466 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
467 int as = !!get_cur_sas(vcpu_e500);
468 unsigned int pid = get_cur_spid(vcpu_e500);
469 int esel, tlbsel;
470 struct tlbe *gtlbe = NULL;
471 gva_t ea;
472
8e5b26b5 473 ea = kvmppc_get_gpr(vcpu, rb);
bc8080cb
HB		 474
475 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
476 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
477 if (esel >= 0) {
478 gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
479 break;
480 }
481 }
482
483 if (gtlbe) {
484 vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
485 | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
486 vcpu_e500->mas1 = gtlbe->mas1;
487 vcpu_e500->mas2 = gtlbe->mas2;
488 vcpu_e500->mas3 = gtlbe->mas3;
489 vcpu_e500->mas7 = gtlbe->mas7;
490 } else {
491 int victim;
492
fb2838d4 493 /* since we only have two TLBs, only lower bit is used. */
bc8080cb
HB		 494 tlbsel = vcpu_e500->mas4 >> 28 & 0x1;
495 victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
496
497 vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
498 | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
499 vcpu_e500->mas1 = (vcpu_e500->mas6 & MAS6_SPID0)
500 | (vcpu_e500->mas6 & (MAS6_SAS ? MAS1_TS : 0))
501 | (vcpu_e500->mas4 & MAS4_TSIZED(~0));
502 vcpu_e500->mas2 &= MAS2_EPN;
503 vcpu_e500->mas2 |= vcpu_e500->mas4 & MAS2_ATTRIB_MASK;
504 vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
505 vcpu_e500->mas7 = 0;
506 }
507
508 return EMULATE_DONE;
509}
510
511int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
512{
513 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
514 u64 eaddr;
515 u64 raddr;
516 u32 tid;
517 struct tlbe *gtlbe;
518 int tlbsel, esel, stlbsel, sesel;
519
520 tlbsel = get_tlb_tlbsel(vcpu_e500);
521 esel = get_tlb_esel(vcpu_e500, tlbsel);
522
523 gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
524
525 if (get_tlb_v(gtlbe) && tlbsel == 1) {
526 eaddr = get_tlb_eaddr(gtlbe);
527 tid = get_tlb_tid(gtlbe);
528 kvmppc_e500_tlb1_invalidate(vcpu_e500, eaddr,
529 get_tlb_end(gtlbe), tid);
530 }
531
532 gtlbe->mas1 = vcpu_e500->mas1;
533 gtlbe->mas2 = vcpu_e500->mas2;
534 gtlbe->mas3 = vcpu_e500->mas3;
535 gtlbe->mas7 = vcpu_e500->mas7;
536
46f43c6e
MT		 537 trace_kvm_gtlb_write(vcpu_e500->mas0, gtlbe->mas1, gtlbe->mas2,
538 gtlbe->mas3, gtlbe->mas7);
bc8080cb
HB		 539
540 /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
541 if (tlbe_is_host_safe(vcpu, gtlbe)) {
542 switch (tlbsel) {
543 case 0:
544 /* TLB0 */
545 gtlbe->mas1 &= ~MAS1_TSIZE(~0);
0cfb50e5 546 gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
bc8080cb
HB		 547
548 stlbsel = 0;
549 sesel = kvmppc_e500_stlbe_map(vcpu_e500, 0, esel);
550
551 break;
552
553 case 1:
554 /* TLB1 */
555 eaddr = get_tlb_eaddr(gtlbe);
556 raddr = get_tlb_raddr(gtlbe);
557
558 /* Create a 4KB mapping on the host.
559 * If the guest wanted a large page,
560 * only the first 4KB is mapped here and the rest
561 * are mapped on the fly. */
562 stlbsel = 1;
563 sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
564 raddr >> PAGE_SHIFT, gtlbe);
565 break;
566
567 default:
568 BUG();
569 }
570 write_host_tlbe(vcpu_e500, stlbsel, sesel);
571 }
572
573 return EMULATE_DONE;
574}
575
576int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
577{
578 unsigned int as = !!(vcpu->arch.msr & MSR_IS);
579
580 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
581}
582
583int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
584{
585 unsigned int as = !!(vcpu->arch.msr & MSR_DS);
586
587 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
588}
589
590void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
591{
592 unsigned int as = !!(vcpu->arch.msr & MSR_IS);
593
594 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
595}
596
597void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
598{
599 unsigned int as = !!(vcpu->arch.msr & MSR_DS);
600
601 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
602}
603
604gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
605 gva_t eaddr)
606{
607 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
608 struct tlbe *gtlbe =
609 &vcpu_e500->guest_tlb[tlbsel_of(index)][esel_of(index)];
610 u64 pgmask = get_tlb_bytes(gtlbe) - 1;
611
612 return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
613}
614
615void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
616{
617 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
618 int tlbsel, i;
619
620 for (tlbsel = 0; tlbsel < 2; tlbsel++)
621 for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++)
622 kvmppc_e500_shadow_release(vcpu_e500, tlbsel, i);
623
624 /* discard all guest mapping */
9aa4dd5e 625 _tlbil_all();
bc8080cb
HB		 626}
627
628void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
629 unsigned int index)
630{
631 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
632 int tlbsel = tlbsel_of(index);
633 int esel = esel_of(index);
634 int stlbsel, sesel;
635
636 switch (tlbsel) {
637 case 0:
638 stlbsel = 0;
639 sesel = esel;
640 break;
641
642 case 1: {
643 gfn_t gfn = gpaddr >> PAGE_SHIFT;
644 struct tlbe *gtlbe
645 = &vcpu_e500->guest_tlb[tlbsel][esel];
646
647 stlbsel = 1;
648 sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, gtlbe);
649 break;
650 }
651
652 default:
653 BUG();
654 break;
655 }
656 write_host_tlbe(vcpu_e500, stlbsel, sesel);
657}
658
659int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
660 gva_t eaddr, unsigned int pid, int as)
661{
662 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
663 int esel, tlbsel;
664
665 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
666 esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
667 if (esel >= 0)
668 return index_of(tlbsel, esel);
669 }
670
671 return -1;
672}
673
674void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500)
675{
676 struct tlbe *tlbe;
677
678 /* Insert large initial mapping for guest. */
679 tlbe = &vcpu_e500->guest_tlb[1][0];
0cfb50e5 680 tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_256M);
bc8080cb
HB		 681 tlbe->mas2 = 0;
682 tlbe->mas3 = E500_TLB_SUPER_PERM_MASK;
683 tlbe->mas7 = 0;
684
685 /* 4K map for serial output. Used by kernel wrapper. */
686 tlbe = &vcpu_e500->guest_tlb[1][1];
0cfb50e5 687 tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_4K);
bc8080cb
HB		 688 tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G;
689 tlbe->mas3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK;
690 tlbe->mas7 = 0;
691}
692
693int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
694{
695 tlb1_entry_num = mfspr(SPRN_TLB1CFG) & 0xFFF;
696
697 vcpu_e500->guest_tlb_size[0] = KVM_E500_TLB0_SIZE;
698 vcpu_e500->guest_tlb[0] =
699 kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
700 if (vcpu_e500->guest_tlb[0] == NULL)
701 goto err_out;
702
703 vcpu_e500->shadow_tlb_size[0] = KVM_E500_TLB0_SIZE;
704 vcpu_e500->shadow_tlb[0] =
705 kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
706 if (vcpu_e500->shadow_tlb[0] == NULL)
707 goto err_out_guest0;
708
709 vcpu_e500->guest_tlb_size[1] = KVM_E500_TLB1_SIZE;
710 vcpu_e500->guest_tlb[1] =
711 kzalloc(sizeof(struct tlbe) * KVM_E500_TLB1_SIZE, GFP_KERNEL);
712 if (vcpu_e500->guest_tlb[1] == NULL)
713 goto err_out_shadow0;
714
715 vcpu_e500->shadow_tlb_size[1] = tlb1_entry_num;
716 vcpu_e500->shadow_tlb[1] =
717 kzalloc(sizeof(struct tlbe) * tlb1_entry_num, GFP_KERNEL);
718 if (vcpu_e500->shadow_tlb[1] == NULL)
719 goto err_out_guest1;
720
721 vcpu_e500->shadow_pages[0] = (struct page **)
722 kzalloc(sizeof(struct page *) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
723 if (vcpu_e500->shadow_pages[0] == NULL)
724 goto err_out_shadow1;
725
726 vcpu_e500->shadow_pages[1] = (struct page **)
727 kzalloc(sizeof(struct page *) * tlb1_entry_num, GFP_KERNEL);
728 if (vcpu_e500->shadow_pages[1] == NULL)
729 goto err_out_page0;
730
da15bf43
LY		 731 /* Init TLB configuration register */
732 vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL;
733 vcpu_e500->tlb0cfg |= vcpu_e500->guest_tlb_size[0];
734 vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL;
735 vcpu_e500->tlb1cfg |= vcpu_e500->guest_tlb_size[1];
736
bc8080cb
HB		 737 return 0;
738
739err_out_page0:
740 kfree(vcpu_e500->shadow_pages[0]);
741err_out_shadow1:
742 kfree(vcpu_e500->shadow_tlb[1]);
743err_out_guest1:
744 kfree(vcpu_e500->guest_tlb[1]);
745err_out_shadow0:
746 kfree(vcpu_e500->shadow_tlb[0]);
747err_out_guest0:
748 kfree(vcpu_e500->guest_tlb[0]);
749err_out:
750 return -1;
751}
752
753void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
754{
755 kfree(vcpu_e500->shadow_pages[1]);
756 kfree(vcpu_e500->shadow_pages[0]);
757 kfree(vcpu_e500->shadow_tlb[1]);
758 kfree(vcpu_e500->guest_tlb[1]);
759 kfree(vcpu_e500->shadow_tlb[0]);
760 kfree(vcpu_e500->guest_tlb[0]);
761}
Linux kernel - Deliverables
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