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KVM: PPC: BookE: Add some more trace points
[deliverable/linux.git] / arch / powerpc / kvm / e500_tlb.c
1 /*
2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
3 *
4 * Author: Yu Liu, yu.liu@freescale.com
5 * Scott Wood, scottwood@freescale.com
6 * Ashish Kalra, ashish.kalra@freescale.com
7 * Varun Sethi, varun.sethi@freescale.com
8 *
9 * Description:
10 * This file is based on arch/powerpc/kvm/44x_tlb.c,
11 * by Hollis Blanchard <hollisb@us.ibm.com>.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License, version 2, as
15 * published by the Free Software Foundation.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/string.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_host.h>
24 #include <linux/highmem.h>
25 #include <linux/log2.h>
26 #include <linux/uaccess.h>
27 #include <linux/sched.h>
28 #include <linux/rwsem.h>
29 #include <linux/vmalloc.h>
30 #include <linux/hugetlb.h>
31 #include <asm/kvm_ppc.h>
32
33 #include "e500.h"
34 #include "trace.h"
35 #include "timing.h"
36
37 #define to_htlb1_esel(esel) (host_tlb_params[1].entries - (esel) - 1)
38
39 static struct kvmppc_e500_tlb_params host_tlb_params[E500_TLB_NUM];
40
41 static inline unsigned int gtlb0_get_next_victim(
42 struct kvmppc_vcpu_e500 *vcpu_e500)
43 {
44 unsigned int victim;
45
46 victim = vcpu_e500->gtlb_nv[0]++;
47 if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways))
48 vcpu_e500->gtlb_nv[0] = 0;
49
50 return victim;
51 }
52
53 static inline unsigned int tlb1_max_shadow_size(void)
54 {
55 /* reserve one entry for magic page */
56 return host_tlb_params[1].entries - tlbcam_index - 1;
57 }
58
59 static inline int tlbe_is_writable(struct kvm_book3e_206_tlb_entry *tlbe)
60 {
61 return tlbe->mas7_3 & (MAS3_SW|MAS3_UW);
62 }
63
64 static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)
65 {
66 /* Mask off reserved bits. */
67 mas3 &= MAS3_ATTRIB_MASK;
68
69 #ifndef CONFIG_KVM_BOOKE_HV
70 if (!usermode) {
71 /* Guest is in supervisor mode,
72 * so we need to translate guest
73 * supervisor permissions into user permissions. */
74 mas3 &= ~E500_TLB_USER_PERM_MASK;
75 mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;
76 }
77 mas3 |= E500_TLB_SUPER_PERM_MASK;
78 #endif
79 return mas3;
80 }
81
82 static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)
83 {
84 #ifdef CONFIG_SMP
85 return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;
86 #else
87 return mas2 & MAS2_ATTRIB_MASK;
88 #endif
89 }
90
91 /*
92 * writing shadow tlb entry to host TLB
93 */
94 static inline void __write_host_tlbe(struct kvm_book3e_206_tlb_entry *stlbe,
95 uint32_t mas0)
96 {
97 unsigned long flags;
98
99 local_irq_save(flags);
100 mtspr(SPRN_MAS0, mas0);
101 mtspr(SPRN_MAS1, stlbe->mas1);
102 mtspr(SPRN_MAS2, (unsigned long)stlbe->mas2);
103 mtspr(SPRN_MAS3, (u32)stlbe->mas7_3);
104 mtspr(SPRN_MAS7, (u32)(stlbe->mas7_3 >> 32));
105 #ifdef CONFIG_KVM_BOOKE_HV
106 mtspr(SPRN_MAS8, stlbe->mas8);
107 #endif
108 asm volatile("isync; tlbwe" : : : "memory");
109
110 #ifdef CONFIG_KVM_BOOKE_HV
111 /* Must clear mas8 for other host tlbwe's */
112 mtspr(SPRN_MAS8, 0);
113 isync();
114 #endif
115 local_irq_restore(flags);
116
117 trace_kvm_booke206_stlb_write(mas0, stlbe->mas8, stlbe->mas1,
118 stlbe->mas2, stlbe->mas7_3);
119 }
120
121 /*
122 * Acquire a mas0 with victim hint, as if we just took a TLB miss.
123 *
124 * We don't care about the address we're searching for, other than that it's
125 * in the right set and is not present in the TLB. Using a zero PID and a
126 * userspace address means we don't have to set and then restore MAS5, or
127 * calculate a proper MAS6 value.
128 */
129 static u32 get_host_mas0(unsigned long eaddr)
130 {
131 unsigned long flags;
132 u32 mas0;
133
134 local_irq_save(flags);
135 mtspr(SPRN_MAS6, 0);
136 asm volatile("tlbsx 0, %0" : : "b" (eaddr & ~CONFIG_PAGE_OFFSET));
137 mas0 = mfspr(SPRN_MAS0);
138 local_irq_restore(flags);
139
140 return mas0;
141 }
142
143 /* sesel is for tlb1 only */
144 static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
145 int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe)
146 {
147 u32 mas0;
148
149 if (tlbsel == 0) {
150 mas0 = get_host_mas0(stlbe->mas2);
151 __write_host_tlbe(stlbe, mas0);
152 } else {
153 __write_host_tlbe(stlbe,
154 MAS0_TLBSEL(1) |
155 MAS0_ESEL(to_htlb1_esel(sesel)));
156 }
157 }
158
159 #ifdef CONFIG_KVM_E500V2
160 void kvmppc_map_magic(struct kvm_vcpu *vcpu)
161 {
162 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
163 struct kvm_book3e_206_tlb_entry magic;
164 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
165 unsigned int stid;
166 pfn_t pfn;
167
168 pfn = (pfn_t)virt_to_phys((void *)shared_page) >> PAGE_SHIFT;
169 get_page(pfn_to_page(pfn));
170
171 preempt_disable();
172 stid = kvmppc_e500_get_sid(vcpu_e500, 0, 0, 0, 0);
173
174 magic.mas1 = MAS1_VALID | MAS1_TS | MAS1_TID(stid) |
175 MAS1_TSIZE(BOOK3E_PAGESZ_4K);
176 magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M;
177 magic.mas7_3 = ((u64)pfn << PAGE_SHIFT) |
178 MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR;
179 magic.mas8 = 0;
180
181 __write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index));
182 preempt_enable();
183 }
184 #endif
185
186 static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,
187 int tlbsel, int esel)
188 {
189 struct kvm_book3e_206_tlb_entry *gtlbe =
190 get_entry(vcpu_e500, tlbsel, esel);
191
192 if (tlbsel == 1 &&
193 vcpu_e500->gtlb_priv[1][esel].ref.flags & E500_TLB_BITMAP) {
194 u64 tmp = vcpu_e500->g2h_tlb1_map[esel];
195 int hw_tlb_indx;
196 unsigned long flags;
197
198 local_irq_save(flags);
199 while (tmp) {
200 hw_tlb_indx = __ilog2_u64(tmp & -tmp);
201 mtspr(SPRN_MAS0,
202 MAS0_TLBSEL(1) |
203 MAS0_ESEL(to_htlb1_esel(hw_tlb_indx)));
204 mtspr(SPRN_MAS1, 0);
205 asm volatile("tlbwe");
206 vcpu_e500->h2g_tlb1_rmap[hw_tlb_indx] = 0;
207 tmp &= tmp - 1;
208 }
209 mb();
210 vcpu_e500->g2h_tlb1_map[esel] = 0;
211 vcpu_e500->gtlb_priv[1][esel].ref.flags &= ~E500_TLB_BITMAP;
212 local_irq_restore(flags);
213
214 return;
215 }
216
217 /* Guest tlbe is backed by at most one host tlbe per shadow pid. */
218 kvmppc_e500_tlbil_one(vcpu_e500, gtlbe);
219 }
220
221 static int tlb0_set_base(gva_t addr, int sets, int ways)
222 {
223 int set_base;
224
225 set_base = (addr >> PAGE_SHIFT) & (sets - 1);
226 set_base *= ways;
227
228 return set_base;
229 }
230
231 static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr)
232 {
233 return tlb0_set_base(addr, vcpu_e500->gtlb_params[0].sets,
234 vcpu_e500->gtlb_params[0].ways);
235 }
236
237 static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel)
238 {
239 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
240 int esel = get_tlb_esel_bit(vcpu);
241
242 if (tlbsel == 0) {
243 esel &= vcpu_e500->gtlb_params[0].ways - 1;
244 esel += gtlb0_set_base(vcpu_e500, vcpu->arch.shared->mas2);
245 } else {
246 esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1;
247 }
248
249 return esel;
250 }
251
252 /* Search the guest TLB for a matching entry. */
253 static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
254 gva_t eaddr, int tlbsel, unsigned int pid, int as)
255 {
256 int size = vcpu_e500->gtlb_params[tlbsel].entries;
257 unsigned int set_base, offset;
258 int i;
259
260 if (tlbsel == 0) {
261 set_base = gtlb0_set_base(vcpu_e500, eaddr);
262 size = vcpu_e500->gtlb_params[0].ways;
263 } else {
264 if (eaddr < vcpu_e500->tlb1_min_eaddr ||
265 eaddr > vcpu_e500->tlb1_max_eaddr)
266 return -1;
267 set_base = 0;
268 }
269
270 offset = vcpu_e500->gtlb_offset[tlbsel];
271
272 for (i = 0; i < size; i++) {
273 struct kvm_book3e_206_tlb_entry *tlbe =
274 &vcpu_e500->gtlb_arch[offset + set_base + i];
275 unsigned int tid;
276
277 if (eaddr < get_tlb_eaddr(tlbe))
278 continue;
279
280 if (eaddr > get_tlb_end(tlbe))
281 continue;
282
283 tid = get_tlb_tid(tlbe);
284 if (tid && (tid != pid))
285 continue;
286
287 if (!get_tlb_v(tlbe))
288 continue;
289
290 if (get_tlb_ts(tlbe) != as && as != -1)
291 continue;
292
293 return set_base + i;
294 }
295
296 return -1;
297 }
298
299 static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref,
300 struct kvm_book3e_206_tlb_entry *gtlbe,
301 pfn_t pfn)
302 {
303 ref->pfn = pfn;
304 ref->flags = E500_TLB_VALID;
305
306 if (tlbe_is_writable(gtlbe)) {
307 ref->flags |= E500_TLB_DIRTY;
308 kvm_set_pfn_dirty(pfn);
309 }
310 }
311
312 static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)
313 {
314 if (ref->flags & E500_TLB_VALID) {
315 trace_kvm_booke206_ref_release(ref->pfn, ref->flags);
316 ref->flags = 0;
317 }
318 }
319
320 static void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500)
321 {
322 if (vcpu_e500->g2h_tlb1_map)
323 memset(vcpu_e500->g2h_tlb1_map, 0,
324 sizeof(u64) * vcpu_e500->gtlb_params[1].entries);
325 if (vcpu_e500->h2g_tlb1_rmap)
326 memset(vcpu_e500->h2g_tlb1_rmap, 0,
327 sizeof(unsigned int) * host_tlb_params[1].entries);
328 }
329
330 static void clear_tlb_privs(struct kvmppc_vcpu_e500 *vcpu_e500)
331 {
332 int tlbsel = 0;
333 int i;
334
335 for (i = 0; i < vcpu_e500->gtlb_params[tlbsel].entries; i++) {
336 struct tlbe_ref *ref =
337 &vcpu_e500->gtlb_priv[tlbsel][i].ref;
338 kvmppc_e500_ref_release(ref);
339 }
340 }
341
342 static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500)
343 {
344 int stlbsel = 1;
345 int i;
346
347 kvmppc_e500_tlbil_all(vcpu_e500);
348
349 for (i = 0; i < host_tlb_params[stlbsel].entries; i++) {
350 struct tlbe_ref *ref =
351 &vcpu_e500->tlb_refs[stlbsel][i];
352 kvmppc_e500_ref_release(ref);
353 }
354
355 clear_tlb_privs(vcpu_e500);
356 }
357
358 void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu)
359 {
360 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
361 clear_tlb_refs(vcpu_e500);
362 clear_tlb1_bitmap(vcpu_e500);
363 }
364
365 static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
366 unsigned int eaddr, int as)
367 {
368 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
369 unsigned int victim, tsized;
370 int tlbsel;
371
372 /* since we only have two TLBs, only lower bit is used. */
373 tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1;
374 victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
375 tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f;
376
377 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
378 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
379 vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
380 | MAS1_TID(get_tlbmiss_tid(vcpu))
381 | MAS1_TSIZE(tsized);
382 vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN)
383 | (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK);
384 vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
385 vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1)
386 | (get_cur_pid(vcpu) << 16)
387 | (as ? MAS6_SAS : 0);
388 }
389
390 /* TID must be supplied by the caller */
391 static inline void kvmppc_e500_setup_stlbe(
392 struct kvm_vcpu *vcpu,
393 struct kvm_book3e_206_tlb_entry *gtlbe,
394 int tsize, struct tlbe_ref *ref, u64 gvaddr,
395 struct kvm_book3e_206_tlb_entry *stlbe)
396 {
397 pfn_t pfn = ref->pfn;
398 u32 pr = vcpu->arch.shared->msr & MSR_PR;
399
400 BUG_ON(!(ref->flags & E500_TLB_VALID));
401
402 /* Force IPROT=0 for all guest mappings. */
403 stlbe->mas1 = MAS1_TSIZE(tsize) | get_tlb_sts(gtlbe) | MAS1_VALID;
404 stlbe->mas2 = (gvaddr & MAS2_EPN) |
405 e500_shadow_mas2_attrib(gtlbe->mas2, pr);
406 stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT) |
407 e500_shadow_mas3_attrib(gtlbe->mas7_3, pr);
408
409 #ifdef CONFIG_KVM_BOOKE_HV
410 stlbe->mas8 = MAS8_TGS | vcpu->kvm->arch.lpid;
411 #endif
412 }
413
414 static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
415 u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,
416 int tlbsel, struct kvm_book3e_206_tlb_entry *stlbe,
417 struct tlbe_ref *ref)
418 {
419 struct kvm_memory_slot *slot;
420 unsigned long pfn, hva;
421 int pfnmap = 0;
422 int tsize = BOOK3E_PAGESZ_4K;
423
424 /*
425 * Translate guest physical to true physical, acquiring
426 * a page reference if it is normal, non-reserved memory.
427 *
428 * gfn_to_memslot() must succeed because otherwise we wouldn't
429 * have gotten this far. Eventually we should just pass the slot
430 * pointer through from the first lookup.
431 */
432 slot = gfn_to_memslot(vcpu_e500->vcpu.kvm, gfn);
433 hva = gfn_to_hva_memslot(slot, gfn);
434
435 if (tlbsel == 1) {
436 struct vm_area_struct *vma;
437 down_read(&current->mm->mmap_sem);
438
439 vma = find_vma(current->mm, hva);
440 if (vma && hva >= vma->vm_start &&
441 (vma->vm_flags & VM_PFNMAP)) {
442 /*
443 * This VMA is a physically contiguous region (e.g.
444 * /dev/mem) that bypasses normal Linux page
445 * management. Find the overlap between the
446 * vma and the memslot.
447 */
448
449 unsigned long start, end;
450 unsigned long slot_start, slot_end;
451
452 pfnmap = 1;
453
454 start = vma->vm_pgoff;
455 end = start +
456 ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
457
458 pfn = start + ((hva - vma->vm_start) >> PAGE_SHIFT);
459
460 slot_start = pfn - (gfn - slot->base_gfn);
461 slot_end = slot_start + slot->npages;
462
463 if (start < slot_start)
464 start = slot_start;
465 if (end > slot_end)
466 end = slot_end;
467
468 tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>
469 MAS1_TSIZE_SHIFT;
470
471 /*
472 * e500 doesn't implement the lowest tsize bit,
473 * or 1K pages.
474 */
475 tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);
476
477 /*
478 * Now find the largest tsize (up to what the guest
479 * requested) that will cover gfn, stay within the
480 * range, and for which gfn and pfn are mutually
481 * aligned.
482 */
483
484 for (; tsize > BOOK3E_PAGESZ_4K; tsize -= 2) {
485 unsigned long gfn_start, gfn_end, tsize_pages;
486 tsize_pages = 1 << (tsize - 2);
487
488 gfn_start = gfn & ~(tsize_pages - 1);
489 gfn_end = gfn_start + tsize_pages;
490
491 if (gfn_start + pfn - gfn < start)
492 continue;
493 if (gfn_end + pfn - gfn > end)
494 continue;
495 if ((gfn & (tsize_pages - 1)) !=
496 (pfn & (tsize_pages - 1)))
497 continue;
498
499 gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);
500 pfn &= ~(tsize_pages - 1);
501 break;
502 }
503 } else if (vma && hva >= vma->vm_start &&
504 (vma->vm_flags & VM_HUGETLB)) {
505 unsigned long psize = vma_kernel_pagesize(vma);
506
507 tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>
508 MAS1_TSIZE_SHIFT;
509
510 /*
511 * Take the largest page size that satisfies both host
512 * and guest mapping
513 */
514 tsize = min(__ilog2(psize) - 10, tsize);
515
516 /*
517 * e500 doesn't implement the lowest tsize bit,
518 * or 1K pages.
519 */
520 tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);
521 }
522
523 up_read(&current->mm->mmap_sem);
524 }
525
526 if (likely(!pfnmap)) {
527 unsigned long tsize_pages = 1 << (tsize + 10 - PAGE_SHIFT);
528 pfn = gfn_to_pfn_memslot(slot, gfn);
529 if (is_error_pfn(pfn)) {
530 printk(KERN_ERR "Couldn't get real page for gfn %lx!\n",
531 (long)gfn);
532 return;
533 }
534
535 /* Align guest and physical address to page map boundaries */
536 pfn &= ~(tsize_pages - 1);
537 gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);
538 }
539
540 /* Drop old ref and setup new one. */
541 kvmppc_e500_ref_release(ref);
542 kvmppc_e500_ref_setup(ref, gtlbe, pfn);
543
544 kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
545 ref, gvaddr, stlbe);
546
547 /* Clear i-cache for new pages */
548 kvmppc_mmu_flush_icache(pfn);
549
550 /* Drop refcount on page, so that mmu notifiers can clear it */
551 kvm_release_pfn_clean(pfn);
552 }
553
554 /* XXX only map the one-one case, for now use TLB0 */
555 static void kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500,
556 int esel,
557 struct kvm_book3e_206_tlb_entry *stlbe)
558 {
559 struct kvm_book3e_206_tlb_entry *gtlbe;
560 struct tlbe_ref *ref;
561
562 gtlbe = get_entry(vcpu_e500, 0, esel);
563 ref = &vcpu_e500->gtlb_priv[0][esel].ref;
564
565 kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),
566 get_tlb_raddr(gtlbe) >> PAGE_SHIFT,
567 gtlbe, 0, stlbe, ref);
568 }
569
570 /* Caller must ensure that the specified guest TLB entry is safe to insert into
571 * the shadow TLB. */
572 /* XXX for both one-one and one-to-many , for now use TLB1 */
573 static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
574 u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,
575 struct kvm_book3e_206_tlb_entry *stlbe, int esel)
576 {
577 struct tlbe_ref *ref;
578 unsigned int victim;
579
580 victim = vcpu_e500->host_tlb1_nv++;
581
582 if (unlikely(vcpu_e500->host_tlb1_nv >= tlb1_max_shadow_size()))
583 vcpu_e500->host_tlb1_nv = 0;
584
585 ref = &vcpu_e500->tlb_refs[1][victim];
586 kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, stlbe, ref);
587
588 vcpu_e500->g2h_tlb1_map[esel] |= (u64)1 << victim;
589 vcpu_e500->gtlb_priv[1][esel].ref.flags |= E500_TLB_BITMAP;
590 if (vcpu_e500->h2g_tlb1_rmap[victim]) {
591 unsigned int idx = vcpu_e500->h2g_tlb1_rmap[victim];
592 vcpu_e500->g2h_tlb1_map[idx] &= ~(1ULL << victim);
593 }
594 vcpu_e500->h2g_tlb1_rmap[victim] = esel;
595
596 return victim;
597 }
598
599 static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500)
600 {
601 int size = vcpu_e500->gtlb_params[1].entries;
602 unsigned int offset;
603 gva_t eaddr;
604 int i;
605
606 vcpu_e500->tlb1_min_eaddr = ~0UL;
607 vcpu_e500->tlb1_max_eaddr = 0;
608 offset = vcpu_e500->gtlb_offset[1];
609
610 for (i = 0; i < size; i++) {
611 struct kvm_book3e_206_tlb_entry *tlbe =
612 &vcpu_e500->gtlb_arch[offset + i];
613
614 if (!get_tlb_v(tlbe))
615 continue;
616
617 eaddr = get_tlb_eaddr(tlbe);
618 vcpu_e500->tlb1_min_eaddr =
619 min(vcpu_e500->tlb1_min_eaddr, eaddr);
620
621 eaddr = get_tlb_end(tlbe);
622 vcpu_e500->tlb1_max_eaddr =
623 max(vcpu_e500->tlb1_max_eaddr, eaddr);
624 }
625 }
626
627 static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500,
628 struct kvm_book3e_206_tlb_entry *gtlbe)
629 {
630 unsigned long start, end, size;
631
632 size = get_tlb_bytes(gtlbe);
633 start = get_tlb_eaddr(gtlbe) & ~(size - 1);
634 end = start + size - 1;
635
636 return vcpu_e500->tlb1_min_eaddr == start ||
637 vcpu_e500->tlb1_max_eaddr == end;
638 }
639
640 /* This function is supposed to be called for a adding a new valid tlb entry */
641 static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu,
642 struct kvm_book3e_206_tlb_entry *gtlbe)
643 {
644 unsigned long start, end, size;
645 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
646
647 if (!get_tlb_v(gtlbe))
648 return;
649
650 size = get_tlb_bytes(gtlbe);
651 start = get_tlb_eaddr(gtlbe) & ~(size - 1);
652 end = start + size - 1;
653
654 vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start);
655 vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end);
656 }
657
658 static inline int kvmppc_e500_gtlbe_invalidate(
659 struct kvmppc_vcpu_e500 *vcpu_e500,
660 int tlbsel, int esel)
661 {
662 struct kvm_book3e_206_tlb_entry *gtlbe =
663 get_entry(vcpu_e500, tlbsel, esel);
664
665 if (unlikely(get_tlb_iprot(gtlbe)))
666 return -1;
667
668 if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
669 kvmppc_recalc_tlb1map_range(vcpu_e500);
670
671 gtlbe->mas1 = 0;
672
673 return 0;
674 }
675
676 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
677 {
678 int esel;
679
680 if (value & MMUCSR0_TLB0FI)
681 for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++)
682 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
683 if (value & MMUCSR0_TLB1FI)
684 for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++)
685 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
686
687 /* Invalidate all vcpu id mappings */
688 kvmppc_e500_tlbil_all(vcpu_e500);
689
690 return EMULATE_DONE;
691 }
692
693 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
694 {
695 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
696 unsigned int ia;
697 int esel, tlbsel;
698 gva_t ea;
699
700 ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb);
701
702 ia = (ea >> 2) & 0x1;
703
704 /* since we only have two TLBs, only lower bit is used. */
705 tlbsel = (ea >> 3) & 0x1;
706
707 if (ia) {
708 /* invalidate all entries */
709 for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries;
710 esel++)
711 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
712 } else {
713 ea &= 0xfffff000;
714 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
715 get_cur_pid(vcpu), -1);
716 if (esel >= 0)
717 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
718 }
719
720 /* Invalidate all vcpu id mappings */
721 kvmppc_e500_tlbil_all(vcpu_e500);
722
723 return EMULATE_DONE;
724 }
725
726 static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel,
727 int pid, int rt)
728 {
729 struct kvm_book3e_206_tlb_entry *tlbe;
730 int tid, esel;
731
732 /* invalidate all entries */
733 for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) {
734 tlbe = get_entry(vcpu_e500, tlbsel, esel);
735 tid = get_tlb_tid(tlbe);
736 if (rt == 0 || tid == pid) {
737 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
738 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
739 }
740 }
741 }
742
743 static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid,
744 int ra, int rb)
745 {
746 int tlbsel, esel;
747 gva_t ea;
748
749 ea = kvmppc_get_gpr(&vcpu_e500->vcpu, rb);
750 if (ra)
751 ea += kvmppc_get_gpr(&vcpu_e500->vcpu, ra);
752
753 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
754 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1);
755 if (esel >= 0) {
756 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
757 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
758 break;
759 }
760 }
761 }
762
763 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb)
764 {
765 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
766 int pid = get_cur_spid(vcpu);
767
768 if (rt == 0 || rt == 1) {
769 tlbilx_all(vcpu_e500, 0, pid, rt);
770 tlbilx_all(vcpu_e500, 1, pid, rt);
771 } else if (rt == 3) {
772 tlbilx_one(vcpu_e500, pid, ra, rb);
773 }
774
775 return EMULATE_DONE;
776 }
777
778 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
779 {
780 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
781 int tlbsel, esel;
782 struct kvm_book3e_206_tlb_entry *gtlbe;
783
784 tlbsel = get_tlb_tlbsel(vcpu);
785 esel = get_tlb_esel(vcpu, tlbsel);
786
787 gtlbe = get_entry(vcpu_e500, tlbsel, esel);
788 vcpu->arch.shared->mas0 &= ~MAS0_NV(~0);
789 vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
790 vcpu->arch.shared->mas1 = gtlbe->mas1;
791 vcpu->arch.shared->mas2 = gtlbe->mas2;
792 vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
793
794 return EMULATE_DONE;
795 }
796
797 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
798 {
799 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
800 int as = !!get_cur_sas(vcpu);
801 unsigned int pid = get_cur_spid(vcpu);
802 int esel, tlbsel;
803 struct kvm_book3e_206_tlb_entry *gtlbe = NULL;
804 gva_t ea;
805
806 ea = kvmppc_get_gpr(vcpu, rb);
807
808 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
809 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
810 if (esel >= 0) {
811 gtlbe = get_entry(vcpu_e500, tlbsel, esel);
812 break;
813 }
814 }
815
816 if (gtlbe) {
817 esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1;
818
819 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
820 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
821 vcpu->arch.shared->mas1 = gtlbe->mas1;
822 vcpu->arch.shared->mas2 = gtlbe->mas2;
823 vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
824 } else {
825 int victim;
826
827 /* since we only have two TLBs, only lower bit is used. */
828 tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1;
829 victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
830
831 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel)
832 | MAS0_ESEL(victim)
833 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
834 vcpu->arch.shared->mas1 =
835 (vcpu->arch.shared->mas6 & MAS6_SPID0)
836 | (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0))
837 | (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0));
838 vcpu->arch.shared->mas2 &= MAS2_EPN;
839 vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 &
840 MAS2_ATTRIB_MASK;
841 vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 |
842 MAS3_U2 | MAS3_U3;
843 }
844
845 kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS);
846 return EMULATE_DONE;
847 }
848
849 /* sesel is for tlb1 only */
850 static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
851 struct kvm_book3e_206_tlb_entry *gtlbe,
852 struct kvm_book3e_206_tlb_entry *stlbe,
853 int stlbsel, int sesel)
854 {
855 int stid;
856
857 preempt_disable();
858 stid = kvmppc_e500_get_tlb_stid(&vcpu_e500->vcpu, gtlbe);
859
860 stlbe->mas1 |= MAS1_TID(stid);
861 write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe);
862 preempt_enable();
863 }
864
865 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
866 {
867 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
868 struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;
869 int tlbsel, esel, stlbsel, sesel;
870 int recal = 0;
871
872 tlbsel = get_tlb_tlbsel(vcpu);
873 esel = get_tlb_esel(vcpu, tlbsel);
874
875 gtlbe = get_entry(vcpu_e500, tlbsel, esel);
876
877 if (get_tlb_v(gtlbe)) {
878 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
879 if ((tlbsel == 1) &&
880 kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
881 recal = 1;
882 }
883
884 gtlbe->mas1 = vcpu->arch.shared->mas1;
885 gtlbe->mas2 = vcpu->arch.shared->mas2;
886 gtlbe->mas7_3 = vcpu->arch.shared->mas7_3;
887
888 trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1,
889 gtlbe->mas2, gtlbe->mas7_3);
890
891 if (tlbsel == 1) {
892 /*
893 * If a valid tlb1 entry is overwritten then recalculate the
894 * min/max TLB1 map address range otherwise no need to look
895 * in tlb1 array.
896 */
897 if (recal)
898 kvmppc_recalc_tlb1map_range(vcpu_e500);
899 else
900 kvmppc_set_tlb1map_range(vcpu, gtlbe);
901 }
902
903 /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
904 if (tlbe_is_host_safe(vcpu, gtlbe)) {
905 u64 eaddr;
906 u64 raddr;
907
908 switch (tlbsel) {
909 case 0:
910 /* TLB0 */
911 gtlbe->mas1 &= ~MAS1_TSIZE(~0);
912 gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
913
914 stlbsel = 0;
915 kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);
916 sesel = 0; /* unused */
917
918 break;
919
920 case 1:
921 /* TLB1 */
922 eaddr = get_tlb_eaddr(gtlbe);
923 raddr = get_tlb_raddr(gtlbe);
924
925 /* Create a 4KB mapping on the host.
926 * If the guest wanted a large page,
927 * only the first 4KB is mapped here and the rest
928 * are mapped on the fly. */
929 stlbsel = 1;
930 sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
931 raddr >> PAGE_SHIFT, gtlbe, &stlbe, esel);
932 break;
933
934 default:
935 BUG();
936 }
937
938 write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
939 }
940
941 kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS);
942 return EMULATE_DONE;
943 }
944
945 static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
946 gva_t eaddr, unsigned int pid, int as)
947 {
948 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
949 int esel, tlbsel;
950
951 for (tlbsel = 0; tlbsel < 2; tlbsel++) {
952 esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
953 if (esel >= 0)
954 return index_of(tlbsel, esel);
955 }
956
957 return -1;
958 }
959
960 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
961 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
962 struct kvm_translation *tr)
963 {
964 int index;
965 gva_t eaddr;
966 u8 pid;
967 u8 as;
968
969 eaddr = tr->linear_address;
970 pid = (tr->linear_address >> 32) & 0xff;
971 as = (tr->linear_address >> 40) & 0x1;
972
973 index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
974 if (index < 0) {
975 tr->valid = 0;
976 return 0;
977 }
978
979 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
980 /* XXX what does "writeable" and "usermode" even mean? */
981 tr->valid = 1;
982
983 return 0;
984 }
985
986
987 int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
988 {
989 unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
990
991 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
992 }
993
994 int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
995 {
996 unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
997
998 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
999 }
1000
1001 void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
1002 {
1003 unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
1004
1005 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
1006 }
1007
1008 void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
1009 {
1010 unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
1011
1012 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
1013 }
1014
1015 gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
1016 gva_t eaddr)
1017 {
1018 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
1019 struct kvm_book3e_206_tlb_entry *gtlbe;
1020 u64 pgmask;
1021
1022 gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index));
1023 pgmask = get_tlb_bytes(gtlbe) - 1;
1024
1025 return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
1026 }
1027
1028 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
1029 {
1030 }
1031
1032 void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
1033 unsigned int index)
1034 {
1035 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
1036 struct tlbe_priv *priv;
1037 struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;
1038 int tlbsel = tlbsel_of(index);
1039 int esel = esel_of(index);
1040 int stlbsel, sesel;
1041
1042 gtlbe = get_entry(vcpu_e500, tlbsel, esel);
1043
1044 switch (tlbsel) {
1045 case 0:
1046 stlbsel = 0;
1047 sesel = 0; /* unused */
1048 priv = &vcpu_e500->gtlb_priv[tlbsel][esel];
1049
1050 /* Only triggers after clear_tlb_refs */
1051 if (unlikely(!(priv->ref.flags & E500_TLB_VALID)))
1052 kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);
1053 else
1054 kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,
1055 &priv->ref, eaddr, &stlbe);
1056 break;
1057
1058 case 1: {
1059 gfn_t gfn = gpaddr >> PAGE_SHIFT;
1060
1061 stlbsel = 1;
1062 sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn,
1063 gtlbe, &stlbe, esel);
1064 break;
1065 }
1066
1067 default:
1068 BUG();
1069 break;
1070 }
1071
1072 write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
1073 }
1074
1075 /************* MMU Notifiers *************/
1076
1077 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
1078 {
1079 trace_kvm_unmap_hva(hva);
1080
1081 /*
1082 * Flush all shadow tlb entries everywhere. This is slow, but
1083 * we are 100% sure that we catch the to be unmapped page
1084 */
1085 kvm_flush_remote_tlbs(kvm);
1086
1087 return 0;
1088 }
1089
1090 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
1091 {
1092 /* kvm_unmap_hva flushes everything anyways */
1093 kvm_unmap_hva(kvm, start);
1094
1095 return 0;
1096 }
1097
1098 int kvm_age_hva(struct kvm *kvm, unsigned long hva)
1099 {
1100 /* XXX could be more clever ;) */
1101 return 0;
1102 }
1103
1104 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
1105 {
1106 /* XXX could be more clever ;) */
1107 return 0;
1108 }
1109
1110 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
1111 {
1112 /* The page will get remapped properly on its next fault */
1113 kvm_unmap_hva(kvm, hva);
1114 }
1115
1116 /*****************************************/
1117
1118 static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
1119 {
1120 int i;
1121
1122 clear_tlb1_bitmap(vcpu_e500);
1123 kfree(vcpu_e500->g2h_tlb1_map);
1124
1125 clear_tlb_refs(vcpu_e500);
1126 kfree(vcpu_e500->gtlb_priv[0]);
1127 kfree(vcpu_e500->gtlb_priv[1]);
1128
1129 if (vcpu_e500->shared_tlb_pages) {
1130 vfree((void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch,
1131 PAGE_SIZE)));
1132
1133 for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) {
1134 set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]);
1135 put_page(vcpu_e500->shared_tlb_pages[i]);
1136 }
1137
1138 vcpu_e500->num_shared_tlb_pages = 0;
1139 vcpu_e500->shared_tlb_pages = NULL;
1140 } else {
1141 kfree(vcpu_e500->gtlb_arch);
1142 }
1143
1144 vcpu_e500->gtlb_arch = NULL;
1145 }
1146
1147 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1148 {
1149 sregs->u.e.mas0 = vcpu->arch.shared->mas0;
1150 sregs->u.e.mas1 = vcpu->arch.shared->mas1;
1151 sregs->u.e.mas2 = vcpu->arch.shared->mas2;
1152 sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
1153 sregs->u.e.mas4 = vcpu->arch.shared->mas4;
1154 sregs->u.e.mas6 = vcpu->arch.shared->mas6;
1155
1156 sregs->u.e.mmucfg = vcpu->arch.mmucfg;
1157 sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0];
1158 sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1];
1159 sregs->u.e.tlbcfg[2] = 0;
1160 sregs->u.e.tlbcfg[3] = 0;
1161 }
1162
1163 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1164 {
1165 if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
1166 vcpu->arch.shared->mas0 = sregs->u.e.mas0;
1167 vcpu->arch.shared->mas1 = sregs->u.e.mas1;
1168 vcpu->arch.shared->mas2 = sregs->u.e.mas2;
1169 vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
1170 vcpu->arch.shared->mas4 = sregs->u.e.mas4;
1171 vcpu->arch.shared->mas6 = sregs->u.e.mas6;
1172 }
1173
1174 return 0;
1175 }
1176
1177 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
1178 struct kvm_config_tlb *cfg)
1179 {
1180 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
1181 struct kvm_book3e_206_tlb_params params;
1182 char *virt;
1183 struct page **pages;
1184 struct tlbe_priv *privs[2] = {};
1185 u64 *g2h_bitmap = NULL;
1186 size_t array_len;
1187 u32 sets;
1188 int num_pages, ret, i;
1189
1190 if (cfg->mmu_type != KVM_MMU_FSL_BOOKE_NOHV)
1191 return -EINVAL;
1192
1193 if (copy_from_user(&params, (void __user *)(uintptr_t)cfg->params,
1194 sizeof(params)))
1195 return -EFAULT;
1196
1197 if (params.tlb_sizes[1] > 64)
1198 return -EINVAL;
1199 if (params.tlb_ways[1] != params.tlb_sizes[1])
1200 return -EINVAL;
1201 if (params.tlb_sizes[2] != 0 || params.tlb_sizes[3] != 0)
1202 return -EINVAL;
1203 if (params.tlb_ways[2] != 0 || params.tlb_ways[3] != 0)
1204 return -EINVAL;
1205
1206 if (!is_power_of_2(params.tlb_ways[0]))
1207 return -EINVAL;
1208
1209 sets = params.tlb_sizes[0] >> ilog2(params.tlb_ways[0]);
1210 if (!is_power_of_2(sets))
1211 return -EINVAL;
1212
1213 array_len = params.tlb_sizes[0] + params.tlb_sizes[1];
1214 array_len *= sizeof(struct kvm_book3e_206_tlb_entry);
1215
1216 if (cfg->array_len < array_len)
1217 return -EINVAL;
1218
1219 num_pages = DIV_ROUND_UP(cfg->array + array_len - 1, PAGE_SIZE) -
1220 cfg->array / PAGE_SIZE;
1221 pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
1222 if (!pages)
1223 return -ENOMEM;
1224
1225 ret = get_user_pages_fast(cfg->array, num_pages, 1, pages);
1226 if (ret < 0)
1227 goto err_pages;
1228
1229 if (ret != num_pages) {
1230 num_pages = ret;
1231 ret = -EFAULT;
1232 goto err_put_page;
1233 }
1234
1235 virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL);
1236 if (!virt)
1237 goto err_put_page;
1238
1239 privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0],
1240 GFP_KERNEL);
1241 privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1],
1242 GFP_KERNEL);
1243
1244 if (!privs[0] || !privs[1])
1245 goto err_put_page;
1246
1247 g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1],
1248 GFP_KERNEL);
1249 if (!g2h_bitmap)
1250 goto err_put_page;
1251
1252 free_gtlb(vcpu_e500);
1253
1254 vcpu_e500->gtlb_priv[0] = privs[0];
1255 vcpu_e500->gtlb_priv[1] = privs[1];
1256 vcpu_e500->g2h_tlb1_map = g2h_bitmap;
1257
1258 vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *)
1259 (virt + (cfg->array & (PAGE_SIZE - 1)));
1260
1261 vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0];
1262 vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1];
1263
1264 vcpu_e500->gtlb_offset[0] = 0;
1265 vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];
1266
1267 vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
1268
1269 vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
1270 if (params.tlb_sizes[0] <= 2048)
1271 vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0];
1272 vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
1273
1274 vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
1275 vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1];
1276 vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
1277
1278 vcpu_e500->shared_tlb_pages = pages;
1279 vcpu_e500->num_shared_tlb_pages = num_pages;
1280
1281 vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0];
1282 vcpu_e500->gtlb_params[0].sets = sets;
1283
1284 vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1];
1285 vcpu_e500->gtlb_params[1].sets = 1;
1286
1287 kvmppc_recalc_tlb1map_range(vcpu_e500);
1288 return 0;
1289
1290 err_put_page:
1291 kfree(privs[0]);
1292 kfree(privs[1]);
1293
1294 for (i = 0; i < num_pages; i++)
1295 put_page(pages[i]);
1296
1297 err_pages:
1298 kfree(pages);
1299 return ret;
1300 }
1301
1302 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
1303 struct kvm_dirty_tlb *dirty)
1304 {
1305 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
1306 kvmppc_recalc_tlb1map_range(vcpu_e500);
1307 clear_tlb_refs(vcpu_e500);
1308 return 0;
1309 }
1310
1311 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
1312 {
1313 struct kvm_vcpu *vcpu = &vcpu_e500->vcpu;
1314 int entry_size = sizeof(struct kvm_book3e_206_tlb_entry);
1315 int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE;
1316
1317 host_tlb_params[0].entries = mfspr(SPRN_TLB0CFG) & TLBnCFG_N_ENTRY;
1318 host_tlb_params[1].entries = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
1319
1320 /*
1321 * This should never happen on real e500 hardware, but is
1322 * architecturally possible -- e.g. in some weird nested
1323 * virtualization case.
1324 */
1325 if (host_tlb_params[0].entries == 0 ||
1326 host_tlb_params[1].entries == 0) {
1327 pr_err("%s: need to know host tlb size\n", __func__);
1328 return -ENODEV;
1329 }
1330
1331 host_tlb_params[0].ways = (mfspr(SPRN_TLB0CFG) & TLBnCFG_ASSOC) >>
1332 TLBnCFG_ASSOC_SHIFT;
1333 host_tlb_params[1].ways = host_tlb_params[1].entries;
1334
1335 if (!is_power_of_2(host_tlb_params[0].entries) ||
1336 !is_power_of_2(host_tlb_params[0].ways) ||
1337 host_tlb_params[0].entries < host_tlb_params[0].ways ||
1338 host_tlb_params[0].ways == 0) {
1339 pr_err("%s: bad tlb0 host config: %u entries %u ways\n",
1340 __func__, host_tlb_params[0].entries,
1341 host_tlb_params[0].ways);
1342 return -ENODEV;
1343 }
1344
1345 host_tlb_params[0].sets =
1346 host_tlb_params[0].entries / host_tlb_params[0].ways;
1347 host_tlb_params[1].sets = 1;
1348
1349 vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE;
1350 vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE;
1351
1352 vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM;
1353 vcpu_e500->gtlb_params[0].sets =
1354 KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM;
1355
1356 vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE;
1357 vcpu_e500->gtlb_params[1].sets = 1;
1358
1359 vcpu_e500->gtlb_arch = kmalloc(entries * entry_size, GFP_KERNEL);
1360 if (!vcpu_e500->gtlb_arch)
1361 return -ENOMEM;
1362
1363 vcpu_e500->gtlb_offset[0] = 0;
1364 vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE;
1365
1366 vcpu_e500->tlb_refs[0] =
1367 kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[0].entries,
1368 GFP_KERNEL);
1369 if (!vcpu_e500->tlb_refs[0])
1370 goto err;
1371
1372 vcpu_e500->tlb_refs[1] =
1373 kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[1].entries,
1374 GFP_KERNEL);
1375 if (!vcpu_e500->tlb_refs[1])
1376 goto err;
1377
1378 vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) *
1379 vcpu_e500->gtlb_params[0].entries,
1380 GFP_KERNEL);
1381 if (!vcpu_e500->gtlb_priv[0])
1382 goto err;
1383
1384 vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) *
1385 vcpu_e500->gtlb_params[1].entries,
1386 GFP_KERNEL);
1387 if (!vcpu_e500->gtlb_priv[1])
1388 goto err;
1389
1390 vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(unsigned int) *
1391 vcpu_e500->gtlb_params[1].entries,
1392 GFP_KERNEL);
1393 if (!vcpu_e500->g2h_tlb1_map)
1394 goto err;
1395
1396 vcpu_e500->h2g_tlb1_rmap = kzalloc(sizeof(unsigned int) *
1397 host_tlb_params[1].entries,
1398 GFP_KERNEL);
1399 if (!vcpu_e500->h2g_tlb1_rmap)
1400 goto err;
1401
1402 /* Init TLB configuration register */
1403 vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
1404 ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
1405 vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
1406 vcpu->arch.tlbcfg[0] |=
1407 vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
1408
1409 vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
1410 ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
1411 vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries;
1412 vcpu->arch.tlbcfg[1] |=
1413 vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;
1414
1415 kvmppc_recalc_tlb1map_range(vcpu_e500);
1416 return 0;
1417
1418 err:
1419 free_gtlb(vcpu_e500);
1420 kfree(vcpu_e500->tlb_refs[0]);
1421 kfree(vcpu_e500->tlb_refs[1]);
1422 return -1;
1423 }
1424
1425 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
1426 {
1427 free_gtlb(vcpu_e500);
1428 kfree(vcpu_e500->h2g_tlb1_rmap);
1429 kfree(vcpu_e500->tlb_refs[0]);
1430 kfree(vcpu_e500->tlb_refs[1]);
1431 }
Linux kernel - Deliverables
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