1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved. |
4 | * |
5 | * Author: Yu Liu, yu.liu@freescale.com |
6 | * Scott Wood, scottwood@freescale.com |
7 | * Ashish Kalra, ashish.kalra@freescale.com |
8 | * Varun Sethi, varun.sethi@freescale.com |
9 | * Alexander Graf, agraf@suse.de |
10 | * |
11 | * Description: |
12 | * This file is based on arch/powerpc/kvm/44x_tlb.c, |
13 | * by Hollis Blanchard <hollisb@us.ibm.com>. |
14 | */ |
15 | |
16 | #include <linux/kernel.h> |
17 | #include <linux/types.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/string.h> |
20 | #include <linux/kvm.h> |
21 | #include <linux/kvm_host.h> |
22 | #include <linux/highmem.h> |
23 | #include <linux/log2.h> |
24 | #include <linux/uaccess.h> |
25 | #include <linux/sched.h> |
26 | #include <linux/rwsem.h> |
27 | #include <linux/vmalloc.h> |
28 | #include <linux/hugetlb.h> |
29 | #include <asm/kvm_ppc.h> |
30 | |
31 | #include "e500.h" |
32 | #include "trace_booke.h" |
33 | #include "timing.h" |
34 | #include "e500_mmu_host.h" |
35 | |
36 | static inline unsigned int gtlb0_get_next_victim( |
37 | struct kvmppc_vcpu_e500 *vcpu_e500) |
38 | { |
39 | unsigned int victim; |
40 | |
41 | victim = vcpu_e500->gtlb_nv[0]++; |
42 | if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways)) |
43 | vcpu_e500->gtlb_nv[0] = 0; |
44 | |
45 | return victim; |
46 | } |
47 | |
48 | static int tlb0_set_base(gva_t addr, int sets, int ways) |
49 | { |
50 | int set_base; |
51 | |
52 | set_base = (addr >> PAGE_SHIFT) & (sets - 1); |
53 | set_base *= ways; |
54 | |
55 | return set_base; |
56 | } |
57 | |
58 | static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr) |
59 | { |
60 | return tlb0_set_base(addr, sets: vcpu_e500->gtlb_params[0].sets, |
61 | ways: vcpu_e500->gtlb_params[0].ways); |
62 | } |
63 | |
64 | static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel) |
65 | { |
66 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
67 | int esel = get_tlb_esel_bit(vcpu); |
68 | |
69 | if (tlbsel == 0) { |
70 | esel &= vcpu_e500->gtlb_params[0].ways - 1; |
71 | esel += gtlb0_set_base(vcpu_e500, addr: vcpu->arch.shared->mas2); |
72 | } else { |
73 | esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1; |
74 | } |
75 | |
76 | return esel; |
77 | } |
78 | |
79 | /* Search the guest TLB for a matching entry. */ |
80 | static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500, |
81 | gva_t eaddr, int tlbsel, unsigned int pid, int as) |
82 | { |
83 | int size = vcpu_e500->gtlb_params[tlbsel].entries; |
84 | unsigned int set_base, offset; |
85 | int i; |
86 | |
87 | if (tlbsel == 0) { |
88 | set_base = gtlb0_set_base(vcpu_e500, addr: eaddr); |
89 | size = vcpu_e500->gtlb_params[0].ways; |
90 | } else { |
91 | if (eaddr < vcpu_e500->tlb1_min_eaddr || |
92 | eaddr > vcpu_e500->tlb1_max_eaddr) |
93 | return -1; |
94 | set_base = 0; |
95 | } |
96 | |
97 | offset = vcpu_e500->gtlb_offset[tlbsel]; |
98 | |
99 | for (i = 0; i < size; i++) { |
100 | struct kvm_book3e_206_tlb_entry *tlbe = |
101 | &vcpu_e500->gtlb_arch[offset + set_base + i]; |
102 | unsigned int tid; |
103 | |
104 | if (eaddr < get_tlb_eaddr(tlbe)) |
105 | continue; |
106 | |
107 | if (eaddr > get_tlb_end(tlbe)) |
108 | continue; |
109 | |
110 | tid = get_tlb_tid(tlbe); |
111 | if (tid && (tid != pid)) |
112 | continue; |
113 | |
114 | if (!get_tlb_v(tlbe)) |
115 | continue; |
116 | |
117 | if (get_tlb_ts(tlbe) != as && as != -1) |
118 | continue; |
119 | |
120 | return set_base + i; |
121 | } |
122 | |
123 | return -1; |
124 | } |
125 | |
126 | static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, |
127 | gva_t eaddr, int as) |
128 | { |
129 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
130 | unsigned int victim, tsized; |
131 | int tlbsel; |
132 | |
133 | /* since we only have two TLBs, only lower bit is used. */ |
134 | tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1; |
135 | victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; |
136 | tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f; |
137 | |
138 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim) |
139 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
140 | vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0) |
141 | | MAS1_TID(get_tlbmiss_tid(vcpu)) |
142 | | MAS1_TSIZE(tsized); |
143 | vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN) |
144 | | (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK); |
145 | vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3; |
146 | vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1) |
147 | | (get_cur_pid(vcpu) << 16) |
148 | | (as ? MAS6_SAS : 0); |
149 | } |
150 | |
151 | static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500) |
152 | { |
153 | int size = vcpu_e500->gtlb_params[1].entries; |
154 | unsigned int offset; |
155 | gva_t eaddr; |
156 | int i; |
157 | |
158 | vcpu_e500->tlb1_min_eaddr = ~0UL; |
159 | vcpu_e500->tlb1_max_eaddr = 0; |
160 | offset = vcpu_e500->gtlb_offset[1]; |
161 | |
162 | for (i = 0; i < size; i++) { |
163 | struct kvm_book3e_206_tlb_entry *tlbe = |
164 | &vcpu_e500->gtlb_arch[offset + i]; |
165 | |
166 | if (!get_tlb_v(tlbe)) |
167 | continue; |
168 | |
169 | eaddr = get_tlb_eaddr(tlbe); |
170 | vcpu_e500->tlb1_min_eaddr = |
171 | min(vcpu_e500->tlb1_min_eaddr, eaddr); |
172 | |
173 | eaddr = get_tlb_end(tlbe); |
174 | vcpu_e500->tlb1_max_eaddr = |
175 | max(vcpu_e500->tlb1_max_eaddr, eaddr); |
176 | } |
177 | } |
178 | |
179 | static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500, |
180 | struct kvm_book3e_206_tlb_entry *gtlbe) |
181 | { |
182 | unsigned long start, end, size; |
183 | |
184 | size = get_tlb_bytes(tlbe: gtlbe); |
185 | start = get_tlb_eaddr(tlbe: gtlbe) & ~(size - 1); |
186 | end = start + size - 1; |
187 | |
188 | return vcpu_e500->tlb1_min_eaddr == start || |
189 | vcpu_e500->tlb1_max_eaddr == end; |
190 | } |
191 | |
192 | /* This function is supposed to be called for a adding a new valid tlb entry */ |
193 | static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu, |
194 | struct kvm_book3e_206_tlb_entry *gtlbe) |
195 | { |
196 | unsigned long start, end, size; |
197 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
198 | |
199 | if (!get_tlb_v(tlbe: gtlbe)) |
200 | return; |
201 | |
202 | size = get_tlb_bytes(tlbe: gtlbe); |
203 | start = get_tlb_eaddr(tlbe: gtlbe) & ~(size - 1); |
204 | end = start + size - 1; |
205 | |
206 | vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start); |
207 | vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end); |
208 | } |
209 | |
210 | static inline int kvmppc_e500_gtlbe_invalidate( |
211 | struct kvmppc_vcpu_e500 *vcpu_e500, |
212 | int tlbsel, int esel) |
213 | { |
214 | struct kvm_book3e_206_tlb_entry *gtlbe = |
215 | get_entry(vcpu_e500, tlbsel, entry: esel); |
216 | |
217 | if (unlikely(get_tlb_iprot(gtlbe))) |
218 | return -1; |
219 | |
220 | if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) |
221 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
222 | |
223 | gtlbe->mas1 = 0; |
224 | |
225 | return 0; |
226 | } |
227 | |
228 | int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value) |
229 | { |
230 | int esel; |
231 | |
232 | if (value & MMUCSR0_TLB0FI) |
233 | for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++) |
234 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel: 0, esel); |
235 | if (value & MMUCSR0_TLB1FI) |
236 | for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++) |
237 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel: 1, esel); |
238 | |
239 | /* Invalidate all host shadow mappings */ |
240 | kvmppc_core_flush_tlb(&vcpu_e500->vcpu); |
241 | |
242 | return EMULATE_DONE; |
243 | } |
244 | |
245 | int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea) |
246 | { |
247 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
248 | unsigned int ia; |
249 | int esel, tlbsel; |
250 | |
251 | ia = (ea >> 2) & 0x1; |
252 | |
253 | /* since we only have two TLBs, only lower bit is used. */ |
254 | tlbsel = (ea >> 3) & 0x1; |
255 | |
256 | if (ia) { |
257 | /* invalidate all entries */ |
258 | for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; |
259 | esel++) |
260 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); |
261 | } else { |
262 | ea &= 0xfffff000; |
263 | esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr: ea, tlbsel, |
264 | pid: get_cur_pid(vcpu), as: -1); |
265 | if (esel >= 0) |
266 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); |
267 | } |
268 | |
269 | /* Invalidate all host shadow mappings */ |
270 | kvmppc_core_flush_tlb(&vcpu_e500->vcpu); |
271 | |
272 | return EMULATE_DONE; |
273 | } |
274 | |
275 | static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, |
276 | int pid, int type) |
277 | { |
278 | struct kvm_book3e_206_tlb_entry *tlbe; |
279 | int tid, esel; |
280 | |
281 | /* invalidate all entries */ |
282 | for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) { |
283 | tlbe = get_entry(vcpu_e500, tlbsel, entry: esel); |
284 | tid = get_tlb_tid(tlbe); |
285 | if (type == 0 || tid == pid) { |
286 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); |
287 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); |
288 | } |
289 | } |
290 | } |
291 | |
292 | static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid, |
293 | gva_t ea) |
294 | { |
295 | int tlbsel, esel; |
296 | |
297 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { |
298 | esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr: ea, tlbsel, pid, as: -1); |
299 | if (esel >= 0) { |
300 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); |
301 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); |
302 | break; |
303 | } |
304 | } |
305 | } |
306 | |
307 | int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea) |
308 | { |
309 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
310 | int pid = get_cur_spid(vcpu); |
311 | |
312 | if (type == 0 || type == 1) { |
313 | tlbilx_all(vcpu_e500, tlbsel: 0, pid, type); |
314 | tlbilx_all(vcpu_e500, tlbsel: 1, pid, type); |
315 | } else if (type == 3) { |
316 | tlbilx_one(vcpu_e500, pid, ea); |
317 | } |
318 | |
319 | return EMULATE_DONE; |
320 | } |
321 | |
322 | int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu) |
323 | { |
324 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
325 | int tlbsel, esel; |
326 | struct kvm_book3e_206_tlb_entry *gtlbe; |
327 | |
328 | tlbsel = get_tlb_tlbsel(vcpu); |
329 | esel = get_tlb_esel(vcpu, tlbsel); |
330 | |
331 | gtlbe = get_entry(vcpu_e500, tlbsel, entry: esel); |
332 | vcpu->arch.shared->mas0 &= ~MAS0_NV(~0); |
333 | vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
334 | vcpu->arch.shared->mas1 = gtlbe->mas1; |
335 | vcpu->arch.shared->mas2 = gtlbe->mas2; |
336 | vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; |
337 | |
338 | return EMULATE_DONE; |
339 | } |
340 | |
341 | int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea) |
342 | { |
343 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
344 | int as = !!get_cur_sas(vcpu); |
345 | unsigned int pid = get_cur_spid(vcpu); |
346 | int esel, tlbsel; |
347 | struct kvm_book3e_206_tlb_entry *gtlbe = NULL; |
348 | |
349 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { |
350 | esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr: ea, tlbsel, pid, as); |
351 | if (esel >= 0) { |
352 | gtlbe = get_entry(vcpu_e500, tlbsel, entry: esel); |
353 | break; |
354 | } |
355 | } |
356 | |
357 | if (gtlbe) { |
358 | esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1; |
359 | |
360 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel) |
361 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
362 | vcpu->arch.shared->mas1 = gtlbe->mas1; |
363 | vcpu->arch.shared->mas2 = gtlbe->mas2; |
364 | vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; |
365 | } else { |
366 | int victim; |
367 | |
368 | /* since we only have two TLBs, only lower bit is used. */ |
369 | tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1; |
370 | victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; |
371 | |
372 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) |
373 | | MAS0_ESEL(victim) |
374 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
375 | vcpu->arch.shared->mas1 = |
376 | (vcpu->arch.shared->mas6 & MAS6_SPID0) |
377 | | ((vcpu->arch.shared->mas6 & MAS6_SAS) ? MAS1_TS : 0) |
378 | | (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0)); |
379 | vcpu->arch.shared->mas2 &= MAS2_EPN; |
380 | vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 & |
381 | MAS2_ATTRIB_MASK; |
382 | vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | |
383 | MAS3_U2 | MAS3_U3; |
384 | } |
385 | |
386 | kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS); |
387 | return EMULATE_DONE; |
388 | } |
389 | |
390 | int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) |
391 | { |
392 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
393 | struct kvm_book3e_206_tlb_entry *gtlbe; |
394 | int tlbsel, esel; |
395 | int recal = 0; |
396 | int idx; |
397 | |
398 | tlbsel = get_tlb_tlbsel(vcpu); |
399 | esel = get_tlb_esel(vcpu, tlbsel); |
400 | |
401 | gtlbe = get_entry(vcpu_e500, tlbsel, entry: esel); |
402 | |
403 | if (get_tlb_v(tlbe: gtlbe)) { |
404 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); |
405 | if ((tlbsel == 1) && |
406 | kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) |
407 | recal = 1; |
408 | } |
409 | |
410 | gtlbe->mas1 = vcpu->arch.shared->mas1; |
411 | gtlbe->mas2 = vcpu->arch.shared->mas2; |
412 | if (!(vcpu->arch.shared->msr & MSR_CM)) |
413 | gtlbe->mas2 &= 0xffffffffUL; |
414 | gtlbe->mas7_3 = vcpu->arch.shared->mas7_3; |
415 | |
416 | trace_kvm_booke206_gtlb_write(mas0: vcpu->arch.shared->mas0, mas1: gtlbe->mas1, |
417 | mas2: gtlbe->mas2, mas7_3: gtlbe->mas7_3); |
418 | |
419 | if (tlbsel == 1) { |
420 | /* |
421 | * If a valid tlb1 entry is overwritten then recalculate the |
422 | * min/max TLB1 map address range otherwise no need to look |
423 | * in tlb1 array. |
424 | */ |
425 | if (recal) |
426 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
427 | else |
428 | kvmppc_set_tlb1map_range(vcpu, gtlbe); |
429 | } |
430 | |
431 | idx = srcu_read_lock(ssp: &vcpu->kvm->srcu); |
432 | |
433 | /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ |
434 | if (tlbe_is_host_safe(vcpu, tlbe: gtlbe)) { |
435 | u64 eaddr = get_tlb_eaddr(tlbe: gtlbe); |
436 | u64 raddr = get_tlb_raddr(tlbe: gtlbe); |
437 | |
438 | if (tlbsel == 0) { |
439 | gtlbe->mas1 &= ~MAS1_TSIZE(~0); |
440 | gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K); |
441 | } |
442 | |
443 | /* Premap the faulting page */ |
444 | kvmppc_mmu_map(vcpu, eaddr, raddr, index_of(tlbsel, esel)); |
445 | } |
446 | |
447 | srcu_read_unlock(ssp: &vcpu->kvm->srcu, idx); |
448 | |
449 | kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS); |
450 | return EMULATE_DONE; |
451 | } |
452 | |
453 | static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu, |
454 | gva_t eaddr, unsigned int pid, int as) |
455 | { |
456 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
457 | int esel, tlbsel; |
458 | |
459 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { |
460 | esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as); |
461 | if (esel >= 0) |
462 | return index_of(tlbsel, esel); |
463 | } |
464 | |
465 | return -1; |
466 | } |
467 | |
468 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ |
469 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, |
470 | struct kvm_translation *tr) |
471 | { |
472 | int index; |
473 | gva_t eaddr; |
474 | u8 pid; |
475 | u8 as; |
476 | |
477 | eaddr = tr->linear_address; |
478 | pid = (tr->linear_address >> 32) & 0xff; |
479 | as = (tr->linear_address >> 40) & 0x1; |
480 | |
481 | index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); |
482 | if (index < 0) { |
483 | tr->valid = 0; |
484 | return 0; |
485 | } |
486 | |
487 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); |
488 | /* XXX what does "writeable" and "usermode" even mean? */ |
489 | tr->valid = 1; |
490 | |
491 | return 0; |
492 | } |
493 | |
494 | |
495 | int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) |
496 | { |
497 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); |
498 | |
499 | return kvmppc_e500_tlb_search(vcpu, eaddr, pid: get_cur_pid(vcpu), as); |
500 | } |
501 | |
502 | int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) |
503 | { |
504 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); |
505 | |
506 | return kvmppc_e500_tlb_search(vcpu, eaddr, pid: get_cur_pid(vcpu), as); |
507 | } |
508 | |
509 | void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu) |
510 | { |
511 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); |
512 | |
513 | kvmppc_e500_deliver_tlb_miss(vcpu, eaddr: vcpu->arch.regs.nip, as); |
514 | } |
515 | |
516 | void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu) |
517 | { |
518 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); |
519 | |
520 | kvmppc_e500_deliver_tlb_miss(vcpu, eaddr: vcpu->arch.fault_dear, as); |
521 | } |
522 | |
523 | gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index, |
524 | gva_t eaddr) |
525 | { |
526 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
527 | struct kvm_book3e_206_tlb_entry *gtlbe; |
528 | u64 pgmask; |
529 | |
530 | gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index)); |
531 | pgmask = get_tlb_bytes(tlbe: gtlbe) - 1; |
532 | |
533 | return get_tlb_raddr(tlbe: gtlbe) | (eaddr & pgmask); |
534 | } |
535 | |
536 | /*****************************************/ |
537 | |
538 | static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) |
539 | { |
540 | int i; |
541 | |
542 | kvmppc_core_flush_tlb(&vcpu_e500->vcpu); |
543 | kfree(objp: vcpu_e500->g2h_tlb1_map); |
544 | kfree(objp: vcpu_e500->gtlb_priv[0]); |
545 | kfree(objp: vcpu_e500->gtlb_priv[1]); |
546 | |
547 | if (vcpu_e500->shared_tlb_pages) { |
548 | vfree(addr: (void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch, |
549 | PAGE_SIZE))); |
550 | |
551 | for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) { |
552 | set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]); |
553 | put_page(page: vcpu_e500->shared_tlb_pages[i]); |
554 | } |
555 | |
556 | vcpu_e500->num_shared_tlb_pages = 0; |
557 | |
558 | kfree(objp: vcpu_e500->shared_tlb_pages); |
559 | vcpu_e500->shared_tlb_pages = NULL; |
560 | } else { |
561 | kfree(objp: vcpu_e500->gtlb_arch); |
562 | } |
563 | |
564 | vcpu_e500->gtlb_arch = NULL; |
565 | } |
566 | |
567 | void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
568 | { |
569 | sregs->u.e.mas0 = vcpu->arch.shared->mas0; |
570 | sregs->u.e.mas1 = vcpu->arch.shared->mas1; |
571 | sregs->u.e.mas2 = vcpu->arch.shared->mas2; |
572 | sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3; |
573 | sregs->u.e.mas4 = vcpu->arch.shared->mas4; |
574 | sregs->u.e.mas6 = vcpu->arch.shared->mas6; |
575 | |
576 | sregs->u.e.mmucfg = vcpu->arch.mmucfg; |
577 | sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0]; |
578 | sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1]; |
579 | sregs->u.e.tlbcfg[2] = 0; |
580 | sregs->u.e.tlbcfg[3] = 0; |
581 | } |
582 | |
583 | int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
584 | { |
585 | if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) { |
586 | vcpu->arch.shared->mas0 = sregs->u.e.mas0; |
587 | vcpu->arch.shared->mas1 = sregs->u.e.mas1; |
588 | vcpu->arch.shared->mas2 = sregs->u.e.mas2; |
589 | vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3; |
590 | vcpu->arch.shared->mas4 = sregs->u.e.mas4; |
591 | vcpu->arch.shared->mas6 = sregs->u.e.mas6; |
592 | } |
593 | |
594 | return 0; |
595 | } |
596 | |
597 | int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, |
598 | union kvmppc_one_reg *val) |
599 | { |
600 | int r = 0; |
601 | long int i; |
602 | |
603 | switch (id) { |
604 | case KVM_REG_PPC_MAS0: |
605 | *val = get_reg_val(id, vcpu->arch.shared->mas0); |
606 | break; |
607 | case KVM_REG_PPC_MAS1: |
608 | *val = get_reg_val(id, vcpu->arch.shared->mas1); |
609 | break; |
610 | case KVM_REG_PPC_MAS2: |
611 | *val = get_reg_val(id, vcpu->arch.shared->mas2); |
612 | break; |
613 | case KVM_REG_PPC_MAS7_3: |
614 | *val = get_reg_val(id, vcpu->arch.shared->mas7_3); |
615 | break; |
616 | case KVM_REG_PPC_MAS4: |
617 | *val = get_reg_val(id, vcpu->arch.shared->mas4); |
618 | break; |
619 | case KVM_REG_PPC_MAS6: |
620 | *val = get_reg_val(id, vcpu->arch.shared->mas6); |
621 | break; |
622 | case KVM_REG_PPC_MMUCFG: |
623 | *val = get_reg_val(id, vcpu->arch.mmucfg); |
624 | break; |
625 | case KVM_REG_PPC_EPTCFG: |
626 | *val = get_reg_val(id, vcpu->arch.eptcfg); |
627 | break; |
628 | case KVM_REG_PPC_TLB0CFG: |
629 | case KVM_REG_PPC_TLB1CFG: |
630 | case KVM_REG_PPC_TLB2CFG: |
631 | case KVM_REG_PPC_TLB3CFG: |
632 | i = id - KVM_REG_PPC_TLB0CFG; |
633 | *val = get_reg_val(id, vcpu->arch.tlbcfg[i]); |
634 | break; |
635 | case KVM_REG_PPC_TLB0PS: |
636 | case KVM_REG_PPC_TLB1PS: |
637 | case KVM_REG_PPC_TLB2PS: |
638 | case KVM_REG_PPC_TLB3PS: |
639 | i = id - KVM_REG_PPC_TLB0PS; |
640 | *val = get_reg_val(id, vcpu->arch.tlbps[i]); |
641 | break; |
642 | default: |
643 | r = -EINVAL; |
644 | break; |
645 | } |
646 | |
647 | return r; |
648 | } |
649 | |
650 | int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, |
651 | union kvmppc_one_reg *val) |
652 | { |
653 | int r = 0; |
654 | long int i; |
655 | |
656 | switch (id) { |
657 | case KVM_REG_PPC_MAS0: |
658 | vcpu->arch.shared->mas0 = set_reg_val(id, *val); |
659 | break; |
660 | case KVM_REG_PPC_MAS1: |
661 | vcpu->arch.shared->mas1 = set_reg_val(id, *val); |
662 | break; |
663 | case KVM_REG_PPC_MAS2: |
664 | vcpu->arch.shared->mas2 = set_reg_val(id, *val); |
665 | break; |
666 | case KVM_REG_PPC_MAS7_3: |
667 | vcpu->arch.shared->mas7_3 = set_reg_val(id, *val); |
668 | break; |
669 | case KVM_REG_PPC_MAS4: |
670 | vcpu->arch.shared->mas4 = set_reg_val(id, *val); |
671 | break; |
672 | case KVM_REG_PPC_MAS6: |
673 | vcpu->arch.shared->mas6 = set_reg_val(id, *val); |
674 | break; |
675 | /* Only allow MMU registers to be set to the config supported by KVM */ |
676 | case KVM_REG_PPC_MMUCFG: { |
677 | u32 reg = set_reg_val(id, *val); |
678 | if (reg != vcpu->arch.mmucfg) |
679 | r = -EINVAL; |
680 | break; |
681 | } |
682 | case KVM_REG_PPC_EPTCFG: { |
683 | u32 reg = set_reg_val(id, *val); |
684 | if (reg != vcpu->arch.eptcfg) |
685 | r = -EINVAL; |
686 | break; |
687 | } |
688 | case KVM_REG_PPC_TLB0CFG: |
689 | case KVM_REG_PPC_TLB1CFG: |
690 | case KVM_REG_PPC_TLB2CFG: |
691 | case KVM_REG_PPC_TLB3CFG: { |
692 | /* MMU geometry (N_ENTRY/ASSOC) can be set only using SW_TLB */ |
693 | u32 reg = set_reg_val(id, *val); |
694 | i = id - KVM_REG_PPC_TLB0CFG; |
695 | if (reg != vcpu->arch.tlbcfg[i]) |
696 | r = -EINVAL; |
697 | break; |
698 | } |
699 | case KVM_REG_PPC_TLB0PS: |
700 | case KVM_REG_PPC_TLB1PS: |
701 | case KVM_REG_PPC_TLB2PS: |
702 | case KVM_REG_PPC_TLB3PS: { |
703 | u32 reg = set_reg_val(id, *val); |
704 | i = id - KVM_REG_PPC_TLB0PS; |
705 | if (reg != vcpu->arch.tlbps[i]) |
706 | r = -EINVAL; |
707 | break; |
708 | } |
709 | default: |
710 | r = -EINVAL; |
711 | break; |
712 | } |
713 | |
714 | return r; |
715 | } |
716 | |
717 | static int vcpu_mmu_geometry_update(struct kvm_vcpu *vcpu, |
718 | struct kvm_book3e_206_tlb_params *params) |
719 | { |
720 | vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
721 | if (params->tlb_sizes[0] <= 2048) |
722 | vcpu->arch.tlbcfg[0] |= params->tlb_sizes[0]; |
723 | vcpu->arch.tlbcfg[0] |= params->tlb_ways[0] << TLBnCFG_ASSOC_SHIFT; |
724 | |
725 | vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
726 | vcpu->arch.tlbcfg[1] |= params->tlb_sizes[1]; |
727 | vcpu->arch.tlbcfg[1] |= params->tlb_ways[1] << TLBnCFG_ASSOC_SHIFT; |
728 | return 0; |
729 | } |
730 | |
731 | int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, |
732 | struct kvm_config_tlb *cfg) |
733 | { |
734 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
735 | struct kvm_book3e_206_tlb_params params; |
736 | char *virt; |
737 | struct page **pages; |
738 | struct tlbe_priv *privs[2] = {}; |
739 | u64 *g2h_bitmap; |
740 | size_t array_len; |
741 | u32 sets; |
742 | int num_pages, ret, i; |
743 | |
744 | if (cfg->mmu_type != KVM_MMU_FSL_BOOKE_NOHV) |
745 | return -EINVAL; |
746 | |
747 | if (copy_from_user(to: ¶ms, from: (void __user *)(uintptr_t)cfg->params, |
748 | n: sizeof(params))) |
749 | return -EFAULT; |
750 | |
751 | if (params.tlb_sizes[1] > 64) |
752 | return -EINVAL; |
753 | if (params.tlb_ways[1] != params.tlb_sizes[1]) |
754 | return -EINVAL; |
755 | if (params.tlb_sizes[2] != 0 || params.tlb_sizes[3] != 0) |
756 | return -EINVAL; |
757 | if (params.tlb_ways[2] != 0 || params.tlb_ways[3] != 0) |
758 | return -EINVAL; |
759 | |
760 | if (!is_power_of_2(n: params.tlb_ways[0])) |
761 | return -EINVAL; |
762 | |
763 | sets = params.tlb_sizes[0] >> ilog2(params.tlb_ways[0]); |
764 | if (!is_power_of_2(n: sets)) |
765 | return -EINVAL; |
766 | |
767 | array_len = params.tlb_sizes[0] + params.tlb_sizes[1]; |
768 | array_len *= sizeof(struct kvm_book3e_206_tlb_entry); |
769 | |
770 | if (cfg->array_len < array_len) |
771 | return -EINVAL; |
772 | |
773 | num_pages = DIV_ROUND_UP(cfg->array + array_len - 1, PAGE_SIZE) - |
774 | cfg->array / PAGE_SIZE; |
775 | pages = kmalloc_array(n: num_pages, size: sizeof(*pages), GFP_KERNEL); |
776 | if (!pages) |
777 | return -ENOMEM; |
778 | |
779 | ret = get_user_pages_fast(start: cfg->array, nr_pages: num_pages, gup_flags: FOLL_WRITE, pages); |
780 | if (ret < 0) |
781 | goto free_pages; |
782 | |
783 | if (ret != num_pages) { |
784 | num_pages = ret; |
785 | ret = -EFAULT; |
786 | goto put_pages; |
787 | } |
788 | |
789 | virt = vmap(pages, count: num_pages, VM_MAP, PAGE_KERNEL); |
790 | if (!virt) { |
791 | ret = -ENOMEM; |
792 | goto put_pages; |
793 | } |
794 | |
795 | privs[0] = kcalloc(n: params.tlb_sizes[0], size: sizeof(*privs[0]), GFP_KERNEL); |
796 | if (!privs[0]) { |
797 | ret = -ENOMEM; |
798 | goto put_pages; |
799 | } |
800 | |
801 | privs[1] = kcalloc(n: params.tlb_sizes[1], size: sizeof(*privs[1]), GFP_KERNEL); |
802 | if (!privs[1]) { |
803 | ret = -ENOMEM; |
804 | goto free_privs_first; |
805 | } |
806 | |
807 | g2h_bitmap = kcalloc(n: params.tlb_sizes[1], |
808 | size: sizeof(*g2h_bitmap), |
809 | GFP_KERNEL); |
810 | if (!g2h_bitmap) { |
811 | ret = -ENOMEM; |
812 | goto free_privs_second; |
813 | } |
814 | |
815 | free_gtlb(vcpu_e500); |
816 | |
817 | vcpu_e500->gtlb_priv[0] = privs[0]; |
818 | vcpu_e500->gtlb_priv[1] = privs[1]; |
819 | vcpu_e500->g2h_tlb1_map = g2h_bitmap; |
820 | |
821 | vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *) |
822 | (virt + (cfg->array & (PAGE_SIZE - 1))); |
823 | |
824 | vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0]; |
825 | vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1]; |
826 | |
827 | vcpu_e500->gtlb_offset[0] = 0; |
828 | vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0]; |
829 | |
830 | /* Update vcpu's MMU geometry based on SW_TLB input */ |
831 | vcpu_mmu_geometry_update(vcpu, params: ¶ms); |
832 | |
833 | vcpu_e500->shared_tlb_pages = pages; |
834 | vcpu_e500->num_shared_tlb_pages = num_pages; |
835 | |
836 | vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0]; |
837 | vcpu_e500->gtlb_params[0].sets = sets; |
838 | |
839 | vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1]; |
840 | vcpu_e500->gtlb_params[1].sets = 1; |
841 | |
842 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
843 | return 0; |
844 | free_privs_second: |
845 | kfree(objp: privs[1]); |
846 | free_privs_first: |
847 | kfree(objp: privs[0]); |
848 | put_pages: |
849 | for (i = 0; i < num_pages; i++) |
850 | put_page(page: pages[i]); |
851 | free_pages: |
852 | kfree(objp: pages); |
853 | return ret; |
854 | } |
855 | |
856 | int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu, |
857 | struct kvm_dirty_tlb *dirty) |
858 | { |
859 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
860 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
861 | kvmppc_core_flush_tlb(vcpu); |
862 | return 0; |
863 | } |
864 | |
865 | /* Vcpu's MMU default configuration */ |
866 | static int vcpu_mmu_init(struct kvm_vcpu *vcpu, |
867 | struct kvmppc_e500_tlb_params *params) |
868 | { |
869 | /* Initialize RASIZE, PIDSIZE, NTLBS and MAVN fields with host values*/ |
870 | vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE; |
871 | |
872 | /* Initialize TLBnCFG fields with host values and SW_TLB geometry*/ |
873 | vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) & |
874 | ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
875 | vcpu->arch.tlbcfg[0] |= params[0].entries; |
876 | vcpu->arch.tlbcfg[0] |= params[0].ways << TLBnCFG_ASSOC_SHIFT; |
877 | |
878 | vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) & |
879 | ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
880 | vcpu->arch.tlbcfg[1] |= params[1].entries; |
881 | vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT; |
882 | |
883 | if (has_feature(vcpu, ftr: VCPU_FTR_MMU_V2)) { |
884 | vcpu->arch.tlbps[0] = mfspr(SPRN_TLB0PS); |
885 | vcpu->arch.tlbps[1] = mfspr(SPRN_TLB1PS); |
886 | |
887 | vcpu->arch.mmucfg &= ~MMUCFG_LRAT; |
888 | |
889 | /* Guest mmu emulation currently doesn't handle E.PT */ |
890 | vcpu->arch.eptcfg = 0; |
891 | vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT; |
892 | vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND; |
893 | } |
894 | |
895 | return 0; |
896 | } |
897 | |
898 | int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) |
899 | { |
900 | struct kvm_vcpu *vcpu = &vcpu_e500->vcpu; |
901 | |
902 | if (e500_mmu_host_init(vcpu_e500)) |
903 | goto free_vcpu; |
904 | |
905 | vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE; |
906 | vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE; |
907 | |
908 | vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM; |
909 | vcpu_e500->gtlb_params[0].sets = |
910 | KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM; |
911 | |
912 | vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE; |
913 | vcpu_e500->gtlb_params[1].sets = 1; |
914 | |
915 | vcpu_e500->gtlb_arch = kmalloc_array(KVM_E500_TLB0_SIZE + |
916 | KVM_E500_TLB1_SIZE, |
917 | sizeof(*vcpu_e500->gtlb_arch), |
918 | GFP_KERNEL); |
919 | if (!vcpu_e500->gtlb_arch) |
920 | return -ENOMEM; |
921 | |
922 | vcpu_e500->gtlb_offset[0] = 0; |
923 | vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE; |
924 | |
925 | vcpu_e500->gtlb_priv[0] = kcalloc(n: vcpu_e500->gtlb_params[0].entries, |
926 | size: sizeof(struct tlbe_ref), |
927 | GFP_KERNEL); |
928 | if (!vcpu_e500->gtlb_priv[0]) |
929 | goto free_vcpu; |
930 | |
931 | vcpu_e500->gtlb_priv[1] = kcalloc(n: vcpu_e500->gtlb_params[1].entries, |
932 | size: sizeof(struct tlbe_ref), |
933 | GFP_KERNEL); |
934 | if (!vcpu_e500->gtlb_priv[1]) |
935 | goto free_vcpu; |
936 | |
937 | vcpu_e500->g2h_tlb1_map = kcalloc(n: vcpu_e500->gtlb_params[1].entries, |
938 | size: sizeof(*vcpu_e500->g2h_tlb1_map), |
939 | GFP_KERNEL); |
940 | if (!vcpu_e500->g2h_tlb1_map) |
941 | goto free_vcpu; |
942 | |
943 | vcpu_mmu_init(vcpu, params: vcpu_e500->gtlb_params); |
944 | |
945 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
946 | return 0; |
947 | free_vcpu: |
948 | free_gtlb(vcpu_e500); |
949 | return -1; |
950 | } |
951 | |
952 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) |
953 | { |
954 | free_gtlb(vcpu_e500); |
955 | e500_mmu_host_uninit(vcpu_e500); |
956 | } |
957 | |