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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 | ||
29 | static unsigned int tlb1_entry_num; | |
30 | ||
31 | void 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 | ||
63 | static 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 | ||
75 | static inline unsigned int tlb1_max_shadow_size(void) | |
76 | { | |
77 | return tlb1_entry_num - tlbcam_index; | |
78 | } | |
79 | ||
80 | static inline int tlbe_is_writable(struct tlbe *tlbe) | |
81 | { | |
82 | return tlbe->mas3 & (MAS3_SW|MAS3_UW); | |
83 | } | |
84 | ||
85 | static 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 | ||
101 | static 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 | */ | |
113 | static 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 | ||
122 | static 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 | ||
143 | void 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 | ||
165 | void 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. */ | |
171 | static 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 | ||
203 | static 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 | ||
221 | static 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 | ||
232 | static 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 | ||
261 | static 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 | ||
288 | static 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 */ | |
327 | static 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 */ | |
344 | static 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. */ | |
362 | void 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 | ||
376 | static 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 |
397 | int 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 |
413 | int 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 | ||
420 | ea = ((ra) ? vcpu->arch.gpr[ra] : 0) + vcpu->arch.gpr[rb]; | |
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 | ||
444 | int 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 | ||
464 | int 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 | ||
473 | ea = vcpu->arch.gpr[rb]; | |
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 | ||
511 | int 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 | ||
576 | int 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 | ||
583 | int 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 | ||
590 | void 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 | ||
597 | void 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 | ||
604 | gpa_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 | ||
615 | void 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 | ||
628 | void 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 | ||
659 | int 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 | ||
674 | void 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 | ||
693 | int 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 | ||
731 | return 0; | |
732 | ||
733 | err_out_page0: | |
734 | kfree(vcpu_e500->shadow_pages[0]); | |
735 | err_out_shadow1: | |
736 | kfree(vcpu_e500->shadow_tlb[1]); | |
737 | err_out_guest1: | |
738 | kfree(vcpu_e500->guest_tlb[1]); | |
739 | err_out_shadow0: | |
740 | kfree(vcpu_e500->shadow_tlb[0]); | |
741 | err_out_guest0: | |
742 | kfree(vcpu_e500->guest_tlb[0]); | |
743 | err_out: | |
744 | return -1; | |
745 | } | |
746 | ||
747 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) | |
748 | { | |
749 | kfree(vcpu_e500->shadow_pages[1]); | |
750 | kfree(vcpu_e500->shadow_pages[0]); | |
751 | kfree(vcpu_e500->shadow_tlb[1]); | |
752 | kfree(vcpu_e500->guest_tlb[1]); | |
753 | kfree(vcpu_e500->shadow_tlb[0]); | |
754 | kfree(vcpu_e500->guest_tlb[0]); | |
755 | } |