Commit | Line | Data |
---|---|---|
bc8080cb | 1 | /* |
49ea0695 | 2 | * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. |
bc8080cb HB |
3 | * |
4 | * Author: Yu Liu, yu.liu@freescale.com | |
73196cd3 | 5 | * Scott Wood, scottwood@freescale.com |
4f802fe9 | 6 | * Ashish Kalra, ashish.kalra@freescale.com |
73196cd3 | 7 | * Varun Sethi, varun.sethi@freescale.com |
bc8080cb HB |
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 | ||
0164c0f0 | 18 | #include <linux/kernel.h> |
bc8080cb | 19 | #include <linux/types.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
bc8080cb HB |
21 | #include <linux/string.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/highmem.h> | |
dc83b8bc SW |
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> | |
95325e6b | 30 | #include <linux/hugetlb.h> |
bc8080cb | 31 | #include <asm/kvm_ppc.h> |
bc8080cb | 32 | |
29a5a6f9 | 33 | #include "e500.h" |
46f43c6e | 34 | #include "trace.h" |
49ea0695 | 35 | #include "timing.h" |
bc8080cb | 36 | |
0164c0f0 | 37 | #define to_htlb1_esel(esel) (host_tlb_params[1].entries - (esel) - 1) |
bc8080cb | 38 | |
0164c0f0 | 39 | static struct kvmppc_e500_tlb_params host_tlb_params[E500_TLB_NUM]; |
bc8080cb | 40 | |
0164c0f0 | 41 | static inline unsigned int gtlb0_get_next_victim( |
bc8080cb HB |
42 | struct kvmppc_vcpu_e500 *vcpu_e500) |
43 | { | |
44 | unsigned int victim; | |
45 | ||
08b7fa92 | 46 | victim = vcpu_e500->gtlb_nv[0]++; |
dc83b8bc | 47 | if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways)) |
08b7fa92 | 48 | vcpu_e500->gtlb_nv[0] = 0; |
bc8080cb HB |
49 | |
50 | return victim; | |
51 | } | |
52 | ||
53 | static inline unsigned int tlb1_max_shadow_size(void) | |
54 | { | |
a4cd8b23 | 55 | /* reserve one entry for magic page */ |
0164c0f0 | 56 | return host_tlb_params[1].entries - tlbcam_index - 1; |
bc8080cb HB |
57 | } |
58 | ||
dc83b8bc | 59 | static inline int tlbe_is_writable(struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 60 | { |
dc83b8bc | 61 | return tlbe->mas7_3 & (MAS3_SW|MAS3_UW); |
bc8080cb HB |
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 | ||
73196cd3 | 69 | #ifndef CONFIG_KVM_BOOKE_HV |
bc8080cb HB |
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 | } | |
73196cd3 SW |
77 | mas3 |= E500_TLB_SUPER_PERM_MASK; |
78 | #endif | |
79 | return mas3; | |
bc8080cb HB |
80 | } |
81 | ||
82 | static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode) | |
83 | { | |
046a48b3 LY |
84 | #ifdef CONFIG_SMP |
85 | return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M; | |
86 | #else | |
bc8080cb | 87 | return mas2 & MAS2_ATTRIB_MASK; |
046a48b3 | 88 | #endif |
bc8080cb HB |
89 | } |
90 | ||
91 | /* | |
92 | * writing shadow tlb entry to host TLB | |
93 | */ | |
dc83b8bc SW |
94 | static inline void __write_host_tlbe(struct kvm_book3e_206_tlb_entry *stlbe, |
95 | uint32_t mas0) | |
bc8080cb | 96 | { |
0ef30995 SW |
97 | unsigned long flags; |
98 | ||
99 | local_irq_save(flags); | |
100 | mtspr(SPRN_MAS0, mas0); | |
bc8080cb | 101 | mtspr(SPRN_MAS1, stlbe->mas1); |
dc83b8bc SW |
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)); | |
73196cd3 SW |
105 | #ifdef CONFIG_KVM_BOOKE_HV |
106 | mtspr(SPRN_MAS8, stlbe->mas8); | |
107 | #endif | |
0ef30995 | 108 | asm volatile("isync; tlbwe" : : : "memory"); |
73196cd3 SW |
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 | |
0ef30995 | 115 | local_irq_restore(flags); |
d37b1a03 LY |
116 | |
117 | trace_kvm_booke206_stlb_write(mas0, stlbe->mas8, stlbe->mas1, | |
118 | stlbe->mas2, stlbe->mas7_3); | |
bc8080cb HB |
119 | } |
120 | ||
57013524 SW |
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 */ | |
bc8080cb | 144 | static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500, |
57013524 | 145 | int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe) |
bc8080cb | 146 | { |
57013524 SW |
147 | u32 mas0; |
148 | ||
bc8080cb | 149 | if (tlbsel == 0) { |
57013524 SW |
150 | mas0 = get_host_mas0(stlbe->mas2); |
151 | __write_host_tlbe(stlbe, mas0); | |
bc8080cb | 152 | } else { |
0ef30995 SW |
153 | __write_host_tlbe(stlbe, |
154 | MAS0_TLBSEL(1) | | |
57013524 | 155 | MAS0_ESEL(to_htlb1_esel(sesel))); |
bc8080cb | 156 | } |
bc8080cb HB |
157 | } |
158 | ||
bf7ca4bd | 159 | #ifdef CONFIG_KVM_E500V2 |
a4cd8b23 SW |
160 | void kvmppc_map_magic(struct kvm_vcpu *vcpu) |
161 | { | |
dd9ebf1f | 162 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
dc83b8bc | 163 | struct kvm_book3e_206_tlb_entry magic; |
a4cd8b23 | 164 | ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK; |
dd9ebf1f | 165 | unsigned int stid; |
a4cd8b23 SW |
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 | ||
dd9ebf1f LY |
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) | | |
a4cd8b23 SW |
175 | MAS1_TSIZE(BOOK3E_PAGESZ_4K); |
176 | magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M; | |
dc83b8bc SW |
177 | magic.mas7_3 = ((u64)pfn << PAGE_SHIFT) | |
178 | MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR; | |
d37b1a03 | 179 | magic.mas8 = 0; |
a4cd8b23 SW |
180 | |
181 | __write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index)); | |
dd9ebf1f | 182 | preempt_enable(); |
a4cd8b23 | 183 | } |
8fdd21a2 | 184 | #endif |
dd9ebf1f | 185 | |
0164c0f0 SW |
186 | static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500, |
187 | int tlbsel, int esel) | |
dd9ebf1f | 188 | { |
dc83b8bc SW |
189 | struct kvm_book3e_206_tlb_entry *gtlbe = |
190 | get_entry(vcpu_e500, tlbsel, esel); | |
dd9ebf1f | 191 | |
4f802fe9 SW |
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 | ||
8fdd21a2 | 214 | return; |
dd9ebf1f LY |
215 | } |
216 | ||
8fdd21a2 SW |
217 | /* Guest tlbe is backed by at most one host tlbe per shadow pid. */ |
218 | kvmppc_e500_tlbil_one(vcpu_e500, gtlbe); | |
bc8080cb HB |
219 | } |
220 | ||
0164c0f0 SW |
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 | { | |
dc83b8bc SW |
233 | return tlb0_set_base(addr, vcpu_e500->gtlb_params[0].sets, |
234 | vcpu_e500->gtlb_params[0].ways); | |
0164c0f0 SW |
235 | } |
236 | ||
b5904972 | 237 | static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel) |
0164c0f0 | 238 | { |
b5904972 SW |
239 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
240 | int esel = get_tlb_esel_bit(vcpu); | |
0164c0f0 SW |
241 | |
242 | if (tlbsel == 0) { | |
dc83b8bc | 243 | esel &= vcpu_e500->gtlb_params[0].ways - 1; |
b5904972 | 244 | esel += gtlb0_set_base(vcpu_e500, vcpu->arch.shared->mas2); |
0164c0f0 | 245 | } else { |
dc83b8bc | 246 | esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1; |
0164c0f0 SW |
247 | } |
248 | ||
249 | return esel; | |
250 | } | |
251 | ||
bc8080cb HB |
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 | { | |
dc83b8bc SW |
256 | int size = vcpu_e500->gtlb_params[tlbsel].entries; |
257 | unsigned int set_base, offset; | |
bc8080cb HB |
258 | int i; |
259 | ||
1aee47a0 | 260 | if (tlbsel == 0) { |
0164c0f0 | 261 | set_base = gtlb0_set_base(vcpu_e500, eaddr); |
dc83b8bc | 262 | size = vcpu_e500->gtlb_params[0].ways; |
1aee47a0 | 263 | } else { |
cc902ad4 BB |
264 | if (eaddr < vcpu_e500->tlb1_min_eaddr || |
265 | eaddr > vcpu_e500->tlb1_max_eaddr) | |
266 | return -1; | |
1aee47a0 SW |
267 | set_base = 0; |
268 | } | |
269 | ||
dc83b8bc SW |
270 | offset = vcpu_e500->gtlb_offset[tlbsel]; |
271 | ||
1aee47a0 | 272 | for (i = 0; i < size; i++) { |
dc83b8bc SW |
273 | struct kvm_book3e_206_tlb_entry *tlbe = |
274 | &vcpu_e500->gtlb_arch[offset + set_base + i]; | |
bc8080cb HB |
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 | ||
1aee47a0 | 293 | return set_base + i; |
bc8080cb HB |
294 | } |
295 | ||
296 | return -1; | |
297 | } | |
298 | ||
0164c0f0 | 299 | static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref, |
dc83b8bc | 300 | struct kvm_book3e_206_tlb_entry *gtlbe, |
0164c0f0 | 301 | pfn_t pfn) |
bc8080cb | 302 | { |
0164c0f0 SW |
303 | ref->pfn = pfn; |
304 | ref->flags = E500_TLB_VALID; | |
bc8080cb | 305 | |
430c7ff5 | 306 | if (tlbe_is_writable(gtlbe)) |
862d31f7 | 307 | kvm_set_pfn_dirty(pfn); |
bc8080cb HB |
308 | } |
309 | ||
0164c0f0 | 310 | static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref) |
bc8080cb | 311 | { |
0164c0f0 | 312 | if (ref->flags & E500_TLB_VALID) { |
6346046c | 313 | trace_kvm_booke206_ref_release(ref->pfn, ref->flags); |
0164c0f0 SW |
314 | ref->flags = 0; |
315 | } | |
316 | } | |
317 | ||
4f802fe9 SW |
318 | static void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500) |
319 | { | |
320 | if (vcpu_e500->g2h_tlb1_map) | |
e8143ccb AC |
321 | memset(vcpu_e500->g2h_tlb1_map, 0, |
322 | sizeof(u64) * vcpu_e500->gtlb_params[1].entries); | |
4f802fe9 | 323 | if (vcpu_e500->h2g_tlb1_rmap) |
e8143ccb AC |
324 | memset(vcpu_e500->h2g_tlb1_rmap, 0, |
325 | sizeof(unsigned int) * host_tlb_params[1].entries); | |
4f802fe9 SW |
326 | } |
327 | ||
0164c0f0 SW |
328 | static void clear_tlb_privs(struct kvmppc_vcpu_e500 *vcpu_e500) |
329 | { | |
330 | int tlbsel = 0; | |
331 | int i; | |
bc8080cb | 332 | |
dc83b8bc | 333 | for (i = 0; i < vcpu_e500->gtlb_params[tlbsel].entries; i++) { |
0164c0f0 SW |
334 | struct tlbe_ref *ref = |
335 | &vcpu_e500->gtlb_priv[tlbsel][i].ref; | |
336 | kvmppc_e500_ref_release(ref); | |
08b7fa92 | 337 | } |
bc8080cb HB |
338 | } |
339 | ||
0164c0f0 SW |
340 | static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500) |
341 | { | |
342 | int stlbsel = 1; | |
343 | int i; | |
344 | ||
8fdd21a2 | 345 | kvmppc_e500_tlbil_all(vcpu_e500); |
dc83b8bc | 346 | |
0164c0f0 SW |
347 | for (i = 0; i < host_tlb_params[stlbsel].entries; i++) { |
348 | struct tlbe_ref *ref = | |
349 | &vcpu_e500->tlb_refs[stlbsel][i]; | |
350 | kvmppc_e500_ref_release(ref); | |
351 | } | |
352 | ||
353 | clear_tlb_privs(vcpu_e500); | |
354 | } | |
355 | ||
862d31f7 AG |
356 | void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu) |
357 | { | |
358 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
359 | clear_tlb_refs(vcpu_e500); | |
360 | clear_tlb1_bitmap(vcpu_e500); | |
361 | } | |
362 | ||
bc8080cb HB |
363 | static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, |
364 | unsigned int eaddr, int as) | |
365 | { | |
366 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
8fdd21a2 | 367 | unsigned int victim, tsized; |
bc8080cb HB |
368 | int tlbsel; |
369 | ||
fb2838d4 | 370 | /* since we only have two TLBs, only lower bit is used. */ |
b5904972 | 371 | tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1; |
0164c0f0 | 372 | victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; |
b5904972 | 373 | tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f; |
bc8080cb | 374 | |
b5904972 | 375 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim) |
08b7fa92 | 376 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
b5904972 | 377 | vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0) |
8fdd21a2 | 378 | | MAS1_TID(get_tlbmiss_tid(vcpu)) |
bc8080cb | 379 | | MAS1_TSIZE(tsized); |
b5904972 SW |
380 | vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN) |
381 | | (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK); | |
382 | vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3; | |
383 | vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1) | |
bc8080cb HB |
384 | | (get_cur_pid(vcpu) << 16) |
385 | | (as ? MAS6_SAS : 0); | |
bc8080cb HB |
386 | } |
387 | ||
3bf3cdcc | 388 | /* TID must be supplied by the caller */ |
dc83b8bc | 389 | static inline void kvmppc_e500_setup_stlbe( |
8fdd21a2 | 390 | struct kvm_vcpu *vcpu, |
dc83b8bc SW |
391 | struct kvm_book3e_206_tlb_entry *gtlbe, |
392 | int tsize, struct tlbe_ref *ref, u64 gvaddr, | |
393 | struct kvm_book3e_206_tlb_entry *stlbe) | |
08b7fa92 | 394 | { |
0164c0f0 | 395 | pfn_t pfn = ref->pfn; |
8fdd21a2 | 396 | u32 pr = vcpu->arch.shared->msr & MSR_PR; |
0164c0f0 SW |
397 | |
398 | BUG_ON(!(ref->flags & E500_TLB_VALID)); | |
08b7fa92 | 399 | |
8fdd21a2 SW |
400 | /* Force IPROT=0 for all guest mappings. */ |
401 | stlbe->mas1 = MAS1_TSIZE(tsize) | get_tlb_sts(gtlbe) | MAS1_VALID; | |
402 | stlbe->mas2 = (gvaddr & MAS2_EPN) | | |
403 | e500_shadow_mas2_attrib(gtlbe->mas2, pr); | |
404 | stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT) | | |
405 | e500_shadow_mas3_attrib(gtlbe->mas7_3, pr); | |
73196cd3 SW |
406 | |
407 | #ifdef CONFIG_KVM_BOOKE_HV | |
408 | stlbe->mas8 = MAS8_TGS | vcpu->kvm->arch.lpid; | |
409 | #endif | |
08b7fa92 LY |
410 | } |
411 | ||
bc8080cb | 412 | static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, |
dc83b8bc | 413 | u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe, |
57013524 | 414 | int tlbsel, struct kvm_book3e_206_tlb_entry *stlbe, |
dc83b8bc | 415 | struct tlbe_ref *ref) |
bc8080cb | 416 | { |
9973d54e | 417 | struct kvm_memory_slot *slot; |
9973d54e SW |
418 | unsigned long pfn, hva; |
419 | int pfnmap = 0; | |
420 | int tsize = BOOK3E_PAGESZ_4K; | |
bc8080cb | 421 | |
59c1f4e3 SW |
422 | /* |
423 | * Translate guest physical to true physical, acquiring | |
424 | * a page reference if it is normal, non-reserved memory. | |
9973d54e SW |
425 | * |
426 | * gfn_to_memslot() must succeed because otherwise we wouldn't | |
427 | * have gotten this far. Eventually we should just pass the slot | |
428 | * pointer through from the first lookup. | |
59c1f4e3 | 429 | */ |
9973d54e SW |
430 | slot = gfn_to_memslot(vcpu_e500->vcpu.kvm, gfn); |
431 | hva = gfn_to_hva_memslot(slot, gfn); | |
432 | ||
433 | if (tlbsel == 1) { | |
434 | struct vm_area_struct *vma; | |
435 | down_read(¤t->mm->mmap_sem); | |
436 | ||
437 | vma = find_vma(current->mm, hva); | |
438 | if (vma && hva >= vma->vm_start && | |
439 | (vma->vm_flags & VM_PFNMAP)) { | |
440 | /* | |
441 | * This VMA is a physically contiguous region (e.g. | |
442 | * /dev/mem) that bypasses normal Linux page | |
443 | * management. Find the overlap between the | |
444 | * vma and the memslot. | |
445 | */ | |
446 | ||
447 | unsigned long start, end; | |
448 | unsigned long slot_start, slot_end; | |
449 | ||
450 | pfnmap = 1; | |
451 | ||
452 | start = vma->vm_pgoff; | |
453 | end = start + | |
454 | ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT); | |
455 | ||
456 | pfn = start + ((hva - vma->vm_start) >> PAGE_SHIFT); | |
457 | ||
458 | slot_start = pfn - (gfn - slot->base_gfn); | |
459 | slot_end = slot_start + slot->npages; | |
460 | ||
461 | if (start < slot_start) | |
462 | start = slot_start; | |
463 | if (end > slot_end) | |
464 | end = slot_end; | |
465 | ||
466 | tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >> | |
467 | MAS1_TSIZE_SHIFT; | |
468 | ||
469 | /* | |
470 | * e500 doesn't implement the lowest tsize bit, | |
471 | * or 1K pages. | |
472 | */ | |
473 | tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1); | |
474 | ||
475 | /* | |
476 | * Now find the largest tsize (up to what the guest | |
477 | * requested) that will cover gfn, stay within the | |
478 | * range, and for which gfn and pfn are mutually | |
479 | * aligned. | |
480 | */ | |
481 | ||
482 | for (; tsize > BOOK3E_PAGESZ_4K; tsize -= 2) { | |
483 | unsigned long gfn_start, gfn_end, tsize_pages; | |
484 | tsize_pages = 1 << (tsize - 2); | |
485 | ||
486 | gfn_start = gfn & ~(tsize_pages - 1); | |
487 | gfn_end = gfn_start + tsize_pages; | |
488 | ||
489 | if (gfn_start + pfn - gfn < start) | |
490 | continue; | |
491 | if (gfn_end + pfn - gfn > end) | |
492 | continue; | |
493 | if ((gfn & (tsize_pages - 1)) != | |
494 | (pfn & (tsize_pages - 1))) | |
495 | continue; | |
496 | ||
497 | gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1); | |
498 | pfn &= ~(tsize_pages - 1); | |
499 | break; | |
500 | } | |
95325e6b AG |
501 | } else if (vma && hva >= vma->vm_start && |
502 | (vma->vm_flags & VM_HUGETLB)) { | |
503 | unsigned long psize = vma_kernel_pagesize(vma); | |
504 | ||
505 | tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >> | |
506 | MAS1_TSIZE_SHIFT; | |
507 | ||
508 | /* | |
509 | * Take the largest page size that satisfies both host | |
510 | * and guest mapping | |
511 | */ | |
512 | tsize = min(__ilog2(psize) - 10, tsize); | |
513 | ||
514 | /* | |
515 | * e500 doesn't implement the lowest tsize bit, | |
516 | * or 1K pages. | |
517 | */ | |
518 | tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1); | |
9973d54e SW |
519 | } |
520 | ||
521 | up_read(¤t->mm->mmap_sem); | |
522 | } | |
523 | ||
524 | if (likely(!pfnmap)) { | |
95325e6b | 525 | unsigned long tsize_pages = 1 << (tsize + 10 - PAGE_SHIFT); |
d5661048 | 526 | pfn = gfn_to_pfn_memslot(slot, gfn); |
81c52c56 | 527 | if (is_error_noslot_pfn(pfn)) { |
9973d54e SW |
528 | printk(KERN_ERR "Couldn't get real page for gfn %lx!\n", |
529 | (long)gfn); | |
9973d54e SW |
530 | return; |
531 | } | |
95325e6b AG |
532 | |
533 | /* Align guest and physical address to page map boundaries */ | |
534 | pfn &= ~(tsize_pages - 1); | |
535 | gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1); | |
bc8080cb | 536 | } |
bc8080cb | 537 | |
0164c0f0 SW |
538 | /* Drop old ref and setup new one. */ |
539 | kvmppc_e500_ref_release(ref); | |
540 | kvmppc_e500_ref_setup(ref, gtlbe, pfn); | |
bc8080cb | 541 | |
8fdd21a2 SW |
542 | kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize, |
543 | ref, gvaddr, stlbe); | |
249ba1ee AG |
544 | |
545 | /* Clear i-cache for new pages */ | |
546 | kvmppc_mmu_flush_icache(pfn); | |
862d31f7 AG |
547 | |
548 | /* Drop refcount on page, so that mmu notifiers can clear it */ | |
549 | kvm_release_pfn_clean(pfn); | |
bc8080cb HB |
550 | } |
551 | ||
552 | /* XXX only map the one-one case, for now use TLB0 */ | |
57013524 SW |
553 | static void kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500, |
554 | int esel, | |
555 | struct kvm_book3e_206_tlb_entry *stlbe) | |
bc8080cb | 556 | { |
dc83b8bc | 557 | struct kvm_book3e_206_tlb_entry *gtlbe; |
0164c0f0 | 558 | struct tlbe_ref *ref; |
bc8080cb | 559 | |
dc83b8bc | 560 | gtlbe = get_entry(vcpu_e500, 0, esel); |
0164c0f0 SW |
561 | ref = &vcpu_e500->gtlb_priv[0][esel].ref; |
562 | ||
bc8080cb HB |
563 | kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe), |
564 | get_tlb_raddr(gtlbe) >> PAGE_SHIFT, | |
57013524 | 565 | gtlbe, 0, stlbe, ref); |
bc8080cb HB |
566 | } |
567 | ||
568 | /* Caller must ensure that the specified guest TLB entry is safe to insert into | |
569 | * the shadow TLB. */ | |
570 | /* XXX for both one-one and one-to-many , for now use TLB1 */ | |
571 | static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500, | |
dc83b8bc | 572 | u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe, |
4f802fe9 | 573 | struct kvm_book3e_206_tlb_entry *stlbe, int esel) |
bc8080cb | 574 | { |
0164c0f0 | 575 | struct tlbe_ref *ref; |
bc8080cb HB |
576 | unsigned int victim; |
577 | ||
0164c0f0 | 578 | victim = vcpu_e500->host_tlb1_nv++; |
bc8080cb | 579 | |
0164c0f0 SW |
580 | if (unlikely(vcpu_e500->host_tlb1_nv >= tlb1_max_shadow_size())) |
581 | vcpu_e500->host_tlb1_nv = 0; | |
bc8080cb | 582 | |
0164c0f0 | 583 | ref = &vcpu_e500->tlb_refs[1][victim]; |
57013524 | 584 | kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, stlbe, ref); |
bc8080cb | 585 | |
4f802fe9 SW |
586 | vcpu_e500->g2h_tlb1_map[esel] |= (u64)1 << victim; |
587 | vcpu_e500->gtlb_priv[1][esel].ref.flags |= E500_TLB_BITMAP; | |
588 | if (vcpu_e500->h2g_tlb1_rmap[victim]) { | |
589 | unsigned int idx = vcpu_e500->h2g_tlb1_rmap[victim]; | |
590 | vcpu_e500->g2h_tlb1_map[idx] &= ~(1ULL << victim); | |
591 | } | |
592 | vcpu_e500->h2g_tlb1_rmap[victim] = esel; | |
593 | ||
bc8080cb HB |
594 | return victim; |
595 | } | |
596 | ||
cc902ad4 BB |
597 | static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500) |
598 | { | |
599 | int size = vcpu_e500->gtlb_params[1].entries; | |
600 | unsigned int offset; | |
601 | gva_t eaddr; | |
602 | int i; | |
603 | ||
604 | vcpu_e500->tlb1_min_eaddr = ~0UL; | |
605 | vcpu_e500->tlb1_max_eaddr = 0; | |
606 | offset = vcpu_e500->gtlb_offset[1]; | |
607 | ||
608 | for (i = 0; i < size; i++) { | |
609 | struct kvm_book3e_206_tlb_entry *tlbe = | |
610 | &vcpu_e500->gtlb_arch[offset + i]; | |
611 | ||
612 | if (!get_tlb_v(tlbe)) | |
613 | continue; | |
614 | ||
615 | eaddr = get_tlb_eaddr(tlbe); | |
616 | vcpu_e500->tlb1_min_eaddr = | |
617 | min(vcpu_e500->tlb1_min_eaddr, eaddr); | |
618 | ||
619 | eaddr = get_tlb_end(tlbe); | |
620 | vcpu_e500->tlb1_max_eaddr = | |
621 | max(vcpu_e500->tlb1_max_eaddr, eaddr); | |
622 | } | |
623 | } | |
624 | ||
625 | static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500, | |
626 | struct kvm_book3e_206_tlb_entry *gtlbe) | |
627 | { | |
628 | unsigned long start, end, size; | |
629 | ||
630 | size = get_tlb_bytes(gtlbe); | |
631 | start = get_tlb_eaddr(gtlbe) & ~(size - 1); | |
632 | end = start + size - 1; | |
633 | ||
634 | return vcpu_e500->tlb1_min_eaddr == start || | |
635 | vcpu_e500->tlb1_max_eaddr == end; | |
636 | } | |
637 | ||
638 | /* This function is supposed to be called for a adding a new valid tlb entry */ | |
639 | static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu, | |
640 | struct kvm_book3e_206_tlb_entry *gtlbe) | |
641 | { | |
642 | unsigned long start, end, size; | |
643 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
644 | ||
645 | if (!get_tlb_v(gtlbe)) | |
646 | return; | |
647 | ||
648 | size = get_tlb_bytes(gtlbe); | |
649 | start = get_tlb_eaddr(gtlbe) & ~(size - 1); | |
650 | end = start + size - 1; | |
651 | ||
652 | vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start); | |
653 | vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end); | |
654 | } | |
655 | ||
08b7fa92 LY |
656 | static inline int kvmppc_e500_gtlbe_invalidate( |
657 | struct kvmppc_vcpu_e500 *vcpu_e500, | |
658 | int tlbsel, int esel) | |
bc8080cb | 659 | { |
dc83b8bc SW |
660 | struct kvm_book3e_206_tlb_entry *gtlbe = |
661 | get_entry(vcpu_e500, tlbsel, esel); | |
bc8080cb HB |
662 | |
663 | if (unlikely(get_tlb_iprot(gtlbe))) | |
664 | return -1; | |
665 | ||
cc902ad4 BB |
666 | if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) |
667 | kvmppc_recalc_tlb1map_range(vcpu_e500); | |
668 | ||
bc8080cb HB |
669 | gtlbe->mas1 = 0; |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
b0a1835d LY |
674 | int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value) |
675 | { | |
676 | int esel; | |
677 | ||
678 | if (value & MMUCSR0_TLB0FI) | |
dc83b8bc | 679 | for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++) |
b0a1835d LY |
680 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel); |
681 | if (value & MMUCSR0_TLB1FI) | |
dc83b8bc | 682 | for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++) |
b0a1835d LY |
683 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel); |
684 | ||
dd9ebf1f | 685 | /* Invalidate all vcpu id mappings */ |
8fdd21a2 | 686 | kvmppc_e500_tlbil_all(vcpu_e500); |
b0a1835d LY |
687 | |
688 | return EMULATE_DONE; | |
689 | } | |
690 | ||
bc8080cb HB |
691 | int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb) |
692 | { | |
693 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
694 | unsigned int ia; | |
695 | int esel, tlbsel; | |
696 | gva_t ea; | |
697 | ||
8e5b26b5 | 698 | ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb); |
bc8080cb HB |
699 | |
700 | ia = (ea >> 2) & 0x1; | |
701 | ||
fb2838d4 | 702 | /* since we only have two TLBs, only lower bit is used. */ |
bc8080cb HB |
703 | tlbsel = (ea >> 3) & 0x1; |
704 | ||
705 | if (ia) { | |
706 | /* invalidate all entries */ | |
dc83b8bc SW |
707 | for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; |
708 | esel++) | |
bc8080cb HB |
709 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); |
710 | } else { | |
711 | ea &= 0xfffff000; | |
712 | esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, | |
713 | get_cur_pid(vcpu), -1); | |
714 | if (esel >= 0) | |
715 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); | |
716 | } | |
717 | ||
dd9ebf1f | 718 | /* Invalidate all vcpu id mappings */ |
8fdd21a2 | 719 | kvmppc_e500_tlbil_all(vcpu_e500); |
bc8080cb HB |
720 | |
721 | return EMULATE_DONE; | |
722 | } | |
723 | ||
ab9fc405 SW |
724 | static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, |
725 | int pid, int rt) | |
726 | { | |
727 | struct kvm_book3e_206_tlb_entry *tlbe; | |
728 | int tid, esel; | |
729 | ||
730 | /* invalidate all entries */ | |
731 | for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) { | |
732 | tlbe = get_entry(vcpu_e500, tlbsel, esel); | |
733 | tid = get_tlb_tid(tlbe); | |
734 | if (rt == 0 || tid == pid) { | |
735 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); | |
736 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); | |
737 | } | |
738 | } | |
739 | } | |
740 | ||
741 | static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid, | |
742 | int ra, int rb) | |
743 | { | |
744 | int tlbsel, esel; | |
745 | gva_t ea; | |
746 | ||
747 | ea = kvmppc_get_gpr(&vcpu_e500->vcpu, rb); | |
748 | if (ra) | |
749 | ea += kvmppc_get_gpr(&vcpu_e500->vcpu, ra); | |
750 | ||
751 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { | |
752 | esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1); | |
753 | if (esel >= 0) { | |
754 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); | |
755 | kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); | |
756 | break; | |
757 | } | |
758 | } | |
759 | } | |
760 | ||
761 | int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb) | |
762 | { | |
763 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
764 | int pid = get_cur_spid(vcpu); | |
765 | ||
766 | if (rt == 0 || rt == 1) { | |
767 | tlbilx_all(vcpu_e500, 0, pid, rt); | |
768 | tlbilx_all(vcpu_e500, 1, pid, rt); | |
769 | } else if (rt == 3) { | |
770 | tlbilx_one(vcpu_e500, pid, ra, rb); | |
771 | } | |
772 | ||
773 | return EMULATE_DONE; | |
774 | } | |
775 | ||
bc8080cb HB |
776 | int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu) |
777 | { | |
778 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
779 | int tlbsel, esel; | |
dc83b8bc | 780 | struct kvm_book3e_206_tlb_entry *gtlbe; |
bc8080cb | 781 | |
b5904972 SW |
782 | tlbsel = get_tlb_tlbsel(vcpu); |
783 | esel = get_tlb_esel(vcpu, tlbsel); | |
bc8080cb | 784 | |
dc83b8bc | 785 | gtlbe = get_entry(vcpu_e500, tlbsel, esel); |
b5904972 SW |
786 | vcpu->arch.shared->mas0 &= ~MAS0_NV(~0); |
787 | vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); | |
788 | vcpu->arch.shared->mas1 = gtlbe->mas1; | |
789 | vcpu->arch.shared->mas2 = gtlbe->mas2; | |
790 | vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; | |
bc8080cb HB |
791 | |
792 | return EMULATE_DONE; | |
793 | } | |
794 | ||
795 | int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb) | |
796 | { | |
797 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
b5904972 SW |
798 | int as = !!get_cur_sas(vcpu); |
799 | unsigned int pid = get_cur_spid(vcpu); | |
bc8080cb | 800 | int esel, tlbsel; |
dc83b8bc | 801 | struct kvm_book3e_206_tlb_entry *gtlbe = NULL; |
bc8080cb HB |
802 | gva_t ea; |
803 | ||
8e5b26b5 | 804 | ea = kvmppc_get_gpr(vcpu, rb); |
bc8080cb HB |
805 | |
806 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { | |
807 | esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as); | |
808 | if (esel >= 0) { | |
dc83b8bc | 809 | gtlbe = get_entry(vcpu_e500, tlbsel, esel); |
bc8080cb HB |
810 | break; |
811 | } | |
812 | } | |
813 | ||
814 | if (gtlbe) { | |
303b7c97 SW |
815 | esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1; |
816 | ||
b5904972 | 817 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel) |
08b7fa92 | 818 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
b5904972 SW |
819 | vcpu->arch.shared->mas1 = gtlbe->mas1; |
820 | vcpu->arch.shared->mas2 = gtlbe->mas2; | |
821 | vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; | |
bc8080cb HB |
822 | } else { |
823 | int victim; | |
824 | ||
fb2838d4 | 825 | /* since we only have two TLBs, only lower bit is used. */ |
b5904972 | 826 | tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1; |
0164c0f0 | 827 | victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; |
bc8080cb | 828 | |
b5904972 SW |
829 | vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) |
830 | | MAS0_ESEL(victim) | |
08b7fa92 | 831 | | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); |
b5904972 SW |
832 | vcpu->arch.shared->mas1 = |
833 | (vcpu->arch.shared->mas6 & MAS6_SPID0) | |
834 | | (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0)) | |
835 | | (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0)); | |
836 | vcpu->arch.shared->mas2 &= MAS2_EPN; | |
837 | vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 & | |
838 | MAS2_ATTRIB_MASK; | |
839 | vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | | |
840 | MAS3_U2 | MAS3_U3; | |
bc8080cb HB |
841 | } |
842 | ||
49ea0695 | 843 | kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS); |
bc8080cb HB |
844 | return EMULATE_DONE; |
845 | } | |
846 | ||
57013524 | 847 | /* sesel is for tlb1 only */ |
3bf3cdcc | 848 | static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500, |
dc83b8bc SW |
849 | struct kvm_book3e_206_tlb_entry *gtlbe, |
850 | struct kvm_book3e_206_tlb_entry *stlbe, | |
3bf3cdcc SW |
851 | int stlbsel, int sesel) |
852 | { | |
853 | int stid; | |
854 | ||
855 | preempt_disable(); | |
8fdd21a2 | 856 | stid = kvmppc_e500_get_tlb_stid(&vcpu_e500->vcpu, gtlbe); |
3bf3cdcc SW |
857 | |
858 | stlbe->mas1 |= MAS1_TID(stid); | |
859 | write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe); | |
860 | preempt_enable(); | |
861 | } | |
862 | ||
bc8080cb HB |
863 | int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) |
864 | { | |
865 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
8fdd21a2 SW |
866 | struct kvm_book3e_206_tlb_entry *gtlbe, stlbe; |
867 | int tlbsel, esel, stlbsel, sesel; | |
cc902ad4 | 868 | int recal = 0; |
bc8080cb | 869 | |
b5904972 SW |
870 | tlbsel = get_tlb_tlbsel(vcpu); |
871 | esel = get_tlb_esel(vcpu, tlbsel); | |
bc8080cb | 872 | |
dc83b8bc | 873 | gtlbe = get_entry(vcpu_e500, tlbsel, esel); |
bc8080cb | 874 | |
cc902ad4 | 875 | if (get_tlb_v(gtlbe)) { |
0164c0f0 | 876 | inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); |
cc902ad4 BB |
877 | if ((tlbsel == 1) && |
878 | kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) | |
879 | recal = 1; | |
880 | } | |
bc8080cb | 881 | |
b5904972 SW |
882 | gtlbe->mas1 = vcpu->arch.shared->mas1; |
883 | gtlbe->mas2 = vcpu->arch.shared->mas2; | |
884 | gtlbe->mas7_3 = vcpu->arch.shared->mas7_3; | |
bc8080cb | 885 | |
d37b1a03 LY |
886 | trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1, |
887 | gtlbe->mas2, gtlbe->mas7_3); | |
bc8080cb | 888 | |
cc902ad4 BB |
889 | if (tlbsel == 1) { |
890 | /* | |
891 | * If a valid tlb1 entry is overwritten then recalculate the | |
892 | * min/max TLB1 map address range otherwise no need to look | |
893 | * in tlb1 array. | |
894 | */ | |
895 | if (recal) | |
896 | kvmppc_recalc_tlb1map_range(vcpu_e500); | |
897 | else | |
898 | kvmppc_set_tlb1map_range(vcpu, gtlbe); | |
899 | } | |
900 | ||
bc8080cb HB |
901 | /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ |
902 | if (tlbe_is_host_safe(vcpu, gtlbe)) { | |
08b7fa92 LY |
903 | u64 eaddr; |
904 | u64 raddr; | |
905 | ||
bc8080cb HB |
906 | switch (tlbsel) { |
907 | case 0: | |
908 | /* TLB0 */ | |
909 | gtlbe->mas1 &= ~MAS1_TSIZE(~0); | |
0cfb50e5 | 910 | gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K); |
bc8080cb HB |
911 | |
912 | stlbsel = 0; | |
57013524 SW |
913 | kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); |
914 | sesel = 0; /* unused */ | |
bc8080cb HB |
915 | |
916 | break; | |
917 | ||
918 | case 1: | |
919 | /* TLB1 */ | |
920 | eaddr = get_tlb_eaddr(gtlbe); | |
921 | raddr = get_tlb_raddr(gtlbe); | |
922 | ||
923 | /* Create a 4KB mapping on the host. | |
924 | * If the guest wanted a large page, | |
925 | * only the first 4KB is mapped here and the rest | |
926 | * are mapped on the fly. */ | |
927 | stlbsel = 1; | |
928 | sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, | |
4f802fe9 | 929 | raddr >> PAGE_SHIFT, gtlbe, &stlbe, esel); |
bc8080cb HB |
930 | break; |
931 | ||
932 | default: | |
933 | BUG(); | |
934 | } | |
3bf3cdcc SW |
935 | |
936 | write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel); | |
bc8080cb HB |
937 | } |
938 | ||
49ea0695 | 939 | kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS); |
bc8080cb HB |
940 | return EMULATE_DONE; |
941 | } | |
942 | ||
8fdd21a2 SW |
943 | static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu, |
944 | gva_t eaddr, unsigned int pid, int as) | |
945 | { | |
946 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
947 | int esel, tlbsel; | |
948 | ||
949 | for (tlbsel = 0; tlbsel < 2; tlbsel++) { | |
950 | esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as); | |
951 | if (esel >= 0) | |
952 | return index_of(tlbsel, esel); | |
953 | } | |
954 | ||
955 | return -1; | |
956 | } | |
957 | ||
958 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ | |
959 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, | |
960 | struct kvm_translation *tr) | |
961 | { | |
962 | int index; | |
963 | gva_t eaddr; | |
964 | u8 pid; | |
965 | u8 as; | |
966 | ||
967 | eaddr = tr->linear_address; | |
968 | pid = (tr->linear_address >> 32) & 0xff; | |
969 | as = (tr->linear_address >> 40) & 0x1; | |
970 | ||
971 | index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); | |
972 | if (index < 0) { | |
973 | tr->valid = 0; | |
974 | return 0; | |
975 | } | |
976 | ||
977 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); | |
978 | /* XXX what does "writeable" and "usermode" even mean? */ | |
979 | tr->valid = 1; | |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
984 | ||
bc8080cb HB |
985 | int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) |
986 | { | |
666e7252 | 987 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); |
bc8080cb HB |
988 | |
989 | return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); | |
990 | } | |
991 | ||
992 | int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) | |
993 | { | |
666e7252 | 994 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); |
bc8080cb HB |
995 | |
996 | return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); | |
997 | } | |
998 | ||
999 | void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu) | |
1000 | { | |
666e7252 | 1001 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); |
bc8080cb HB |
1002 | |
1003 | kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as); | |
1004 | } | |
1005 | ||
1006 | void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu) | |
1007 | { | |
666e7252 | 1008 | unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); |
bc8080cb HB |
1009 | |
1010 | kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as); | |
1011 | } | |
1012 | ||
1013 | gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index, | |
1014 | gva_t eaddr) | |
1015 | { | |
1016 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
dc83b8bc SW |
1017 | struct kvm_book3e_206_tlb_entry *gtlbe; |
1018 | u64 pgmask; | |
1019 | ||
1020 | gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index)); | |
1021 | pgmask = get_tlb_bytes(gtlbe) - 1; | |
bc8080cb HB |
1022 | |
1023 | return get_tlb_raddr(gtlbe) | (eaddr & pgmask); | |
1024 | } | |
1025 | ||
1026 | void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) | |
1027 | { | |
bc8080cb HB |
1028 | } |
1029 | ||
1030 | void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, | |
1031 | unsigned int index) | |
1032 | { | |
1033 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
08b7fa92 | 1034 | struct tlbe_priv *priv; |
dc83b8bc | 1035 | struct kvm_book3e_206_tlb_entry *gtlbe, stlbe; |
bc8080cb HB |
1036 | int tlbsel = tlbsel_of(index); |
1037 | int esel = esel_of(index); | |
1038 | int stlbsel, sesel; | |
1039 | ||
dc83b8bc | 1040 | gtlbe = get_entry(vcpu_e500, tlbsel, esel); |
08b7fa92 | 1041 | |
bc8080cb HB |
1042 | switch (tlbsel) { |
1043 | case 0: | |
1044 | stlbsel = 0; | |
57013524 | 1045 | sesel = 0; /* unused */ |
0164c0f0 | 1046 | priv = &vcpu_e500->gtlb_priv[tlbsel][esel]; |
08b7fa92 | 1047 | |
2bb890f5 AG |
1048 | /* Only triggers after clear_tlb_refs */ |
1049 | if (unlikely(!(priv->ref.flags & E500_TLB_VALID))) | |
1050 | kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); | |
1051 | else | |
1052 | kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K, | |
1053 | &priv->ref, eaddr, &stlbe); | |
bc8080cb HB |
1054 | break; |
1055 | ||
1056 | case 1: { | |
1057 | gfn_t gfn = gpaddr >> PAGE_SHIFT; | |
bc8080cb HB |
1058 | |
1059 | stlbsel = 1; | |
08b7fa92 | 1060 | sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, |
4f802fe9 | 1061 | gtlbe, &stlbe, esel); |
bc8080cb HB |
1062 | break; |
1063 | } | |
1064 | ||
1065 | default: | |
1066 | BUG(); | |
1067 | break; | |
1068 | } | |
08b7fa92 | 1069 | |
3bf3cdcc | 1070 | write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel); |
bc8080cb HB |
1071 | } |
1072 | ||
862d31f7 AG |
1073 | /************* MMU Notifiers *************/ |
1074 | ||
1075 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) | |
1076 | { | |
6346046c AG |
1077 | trace_kvm_unmap_hva(hva); |
1078 | ||
862d31f7 AG |
1079 | /* |
1080 | * Flush all shadow tlb entries everywhere. This is slow, but | |
1081 | * we are 100% sure that we catch the to be unmapped page | |
1082 | */ | |
1083 | kvm_flush_remote_tlbs(kvm); | |
1084 | ||
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) | |
1089 | { | |
1090 | /* kvm_unmap_hva flushes everything anyways */ | |
1091 | kvm_unmap_hva(kvm, start); | |
1092 | ||
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | int kvm_age_hva(struct kvm *kvm, unsigned long hva) | |
1097 | { | |
1098 | /* XXX could be more clever ;) */ | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) | |
1103 | { | |
1104 | /* XXX could be more clever ;) */ | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) | |
1109 | { | |
1110 | /* The page will get remapped properly on its next fault */ | |
1111 | kvm_unmap_hva(kvm, hva); | |
1112 | } | |
1113 | ||
1114 | /*****************************************/ | |
1115 | ||
dc83b8bc SW |
1116 | static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) |
1117 | { | |
1118 | int i; | |
1119 | ||
4f802fe9 SW |
1120 | clear_tlb1_bitmap(vcpu_e500); |
1121 | kfree(vcpu_e500->g2h_tlb1_map); | |
1122 | ||
dc83b8bc SW |
1123 | clear_tlb_refs(vcpu_e500); |
1124 | kfree(vcpu_e500->gtlb_priv[0]); | |
1125 | kfree(vcpu_e500->gtlb_priv[1]); | |
1126 | ||
1127 | if (vcpu_e500->shared_tlb_pages) { | |
1128 | vfree((void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch, | |
1129 | PAGE_SIZE))); | |
1130 | ||
1131 | for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) { | |
1132 | set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]); | |
1133 | put_page(vcpu_e500->shared_tlb_pages[i]); | |
1134 | } | |
1135 | ||
1136 | vcpu_e500->num_shared_tlb_pages = 0; | |
adbb48a8 SW |
1137 | |
1138 | kfree(vcpu_e500->shared_tlb_pages); | |
dc83b8bc SW |
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 | ||
8fdd21a2 SW |
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 | ||
dc83b8bc SW |
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] = {}; | |
4f802fe9 | 1185 | u64 *g2h_bitmap = NULL; |
dc83b8bc SW |
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(¶ms, (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); | |
12ecd957 JL |
1236 | if (!virt) { |
1237 | ret = -ENOMEM; | |
dc83b8bc | 1238 | goto err_put_page; |
12ecd957 | 1239 | } |
dc83b8bc SW |
1240 | |
1241 | privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0], | |
1242 | GFP_KERNEL); | |
1243 | privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1], | |
1244 | GFP_KERNEL); | |
1245 | ||
12ecd957 JL |
1246 | if (!privs[0] || !privs[1]) { |
1247 | ret = -ENOMEM; | |
1248 | goto err_privs; | |
1249 | } | |
dc83b8bc | 1250 | |
4f802fe9 SW |
1251 | g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1], |
1252 | GFP_KERNEL); | |
12ecd957 JL |
1253 | if (!g2h_bitmap) { |
1254 | ret = -ENOMEM; | |
1255 | goto err_privs; | |
1256 | } | |
4f802fe9 | 1257 | |
dc83b8bc SW |
1258 | free_gtlb(vcpu_e500); |
1259 | ||
1260 | vcpu_e500->gtlb_priv[0] = privs[0]; | |
1261 | vcpu_e500->gtlb_priv[1] = privs[1]; | |
4f802fe9 | 1262 | vcpu_e500->g2h_tlb1_map = g2h_bitmap; |
dc83b8bc SW |
1263 | |
1264 | vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *) | |
1265 | (virt + (cfg->array & (PAGE_SIZE - 1))); | |
1266 | ||
1267 | vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0]; | |
1268 | vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1]; | |
1269 | ||
1270 | vcpu_e500->gtlb_offset[0] = 0; | |
1271 | vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0]; | |
1272 | ||
8fdd21a2 SW |
1273 | vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE; |
1274 | ||
1275 | vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); | |
dc83b8bc | 1276 | if (params.tlb_sizes[0] <= 2048) |
8fdd21a2 SW |
1277 | vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0]; |
1278 | vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT; | |
dc83b8bc | 1279 | |
8fdd21a2 SW |
1280 | vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
1281 | vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1]; | |
1282 | vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT; | |
dc83b8bc SW |
1283 | |
1284 | vcpu_e500->shared_tlb_pages = pages; | |
1285 | vcpu_e500->num_shared_tlb_pages = num_pages; | |
1286 | ||
1287 | vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0]; | |
1288 | vcpu_e500->gtlb_params[0].sets = sets; | |
1289 | ||
1290 | vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1]; | |
1291 | vcpu_e500->gtlb_params[1].sets = 1; | |
1292 | ||
cc902ad4 | 1293 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
dc83b8bc SW |
1294 | return 0; |
1295 | ||
12ecd957 | 1296 | err_privs: |
dc83b8bc SW |
1297 | kfree(privs[0]); |
1298 | kfree(privs[1]); | |
1299 | ||
12ecd957 | 1300 | err_put_page: |
dc83b8bc SW |
1301 | for (i = 0; i < num_pages; i++) |
1302 | put_page(pages[i]); | |
1303 | ||
1304 | err_pages: | |
1305 | kfree(pages); | |
1306 | return ret; | |
1307 | } | |
1308 | ||
1309 | int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu, | |
1310 | struct kvm_dirty_tlb *dirty) | |
1311 | { | |
1312 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
cc902ad4 | 1313 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
dc83b8bc SW |
1314 | clear_tlb_refs(vcpu_e500); |
1315 | return 0; | |
bc8080cb HB |
1316 | } |
1317 | ||
1318 | int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) | |
1319 | { | |
8fdd21a2 | 1320 | struct kvm_vcpu *vcpu = &vcpu_e500->vcpu; |
dc83b8bc SW |
1321 | int entry_size = sizeof(struct kvm_book3e_206_tlb_entry); |
1322 | int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE; | |
1323 | ||
0164c0f0 SW |
1324 | host_tlb_params[0].entries = mfspr(SPRN_TLB0CFG) & TLBnCFG_N_ENTRY; |
1325 | host_tlb_params[1].entries = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY; | |
1326 | ||
1327 | /* | |
1328 | * This should never happen on real e500 hardware, but is | |
1329 | * architecturally possible -- e.g. in some weird nested | |
1330 | * virtualization case. | |
1331 | */ | |
1332 | if (host_tlb_params[0].entries == 0 || | |
1333 | host_tlb_params[1].entries == 0) { | |
1334 | pr_err("%s: need to know host tlb size\n", __func__); | |
1335 | return -ENODEV; | |
1336 | } | |
1337 | ||
1338 | host_tlb_params[0].ways = (mfspr(SPRN_TLB0CFG) & TLBnCFG_ASSOC) >> | |
1339 | TLBnCFG_ASSOC_SHIFT; | |
1340 | host_tlb_params[1].ways = host_tlb_params[1].entries; | |
1341 | ||
1342 | if (!is_power_of_2(host_tlb_params[0].entries) || | |
1343 | !is_power_of_2(host_tlb_params[0].ways) || | |
1344 | host_tlb_params[0].entries < host_tlb_params[0].ways || | |
1345 | host_tlb_params[0].ways == 0) { | |
1346 | pr_err("%s: bad tlb0 host config: %u entries %u ways\n", | |
1347 | __func__, host_tlb_params[0].entries, | |
1348 | host_tlb_params[0].ways); | |
1349 | return -ENODEV; | |
1350 | } | |
1351 | ||
1352 | host_tlb_params[0].sets = | |
1353 | host_tlb_params[0].entries / host_tlb_params[0].ways; | |
1354 | host_tlb_params[1].sets = 1; | |
bc8080cb | 1355 | |
dc83b8bc SW |
1356 | vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE; |
1357 | vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE; | |
bc8080cb | 1358 | |
dc83b8bc SW |
1359 | vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM; |
1360 | vcpu_e500->gtlb_params[0].sets = | |
1361 | KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM; | |
1362 | ||
1363 | vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE; | |
1364 | vcpu_e500->gtlb_params[1].sets = 1; | |
1365 | ||
1366 | vcpu_e500->gtlb_arch = kmalloc(entries * entry_size, GFP_KERNEL); | |
1367 | if (!vcpu_e500->gtlb_arch) | |
1368 | return -ENOMEM; | |
1369 | ||
1370 | vcpu_e500->gtlb_offset[0] = 0; | |
1371 | vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE; | |
0164c0f0 SW |
1372 | |
1373 | vcpu_e500->tlb_refs[0] = | |
1374 | kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[0].entries, | |
1375 | GFP_KERNEL); | |
1376 | if (!vcpu_e500->tlb_refs[0]) | |
1377 | goto err; | |
1378 | ||
1379 | vcpu_e500->tlb_refs[1] = | |
1380 | kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[1].entries, | |
1381 | GFP_KERNEL); | |
1382 | if (!vcpu_e500->tlb_refs[1]) | |
1383 | goto err; | |
1384 | ||
dc83b8bc SW |
1385 | vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) * |
1386 | vcpu_e500->gtlb_params[0].entries, | |
1387 | GFP_KERNEL); | |
0164c0f0 SW |
1388 | if (!vcpu_e500->gtlb_priv[0]) |
1389 | goto err; | |
1390 | ||
dc83b8bc SW |
1391 | vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) * |
1392 | vcpu_e500->gtlb_params[1].entries, | |
1393 | GFP_KERNEL); | |
0164c0f0 SW |
1394 | if (!vcpu_e500->gtlb_priv[1]) |
1395 | goto err; | |
bc8080cb | 1396 | |
e400e72f | 1397 | vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) * |
4f802fe9 SW |
1398 | vcpu_e500->gtlb_params[1].entries, |
1399 | GFP_KERNEL); | |
1400 | if (!vcpu_e500->g2h_tlb1_map) | |
1401 | goto err; | |
1402 | ||
1403 | vcpu_e500->h2g_tlb1_rmap = kzalloc(sizeof(unsigned int) * | |
1404 | host_tlb_params[1].entries, | |
1405 | GFP_KERNEL); | |
1406 | if (!vcpu_e500->h2g_tlb1_rmap) | |
1407 | goto err; | |
1408 | ||
da15bf43 | 1409 | /* Init TLB configuration register */ |
8fdd21a2 | 1410 | vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) & |
7b11dc99 | 1411 | ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
8fdd21a2 SW |
1412 | vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries; |
1413 | vcpu->arch.tlbcfg[0] |= | |
7b11dc99 SW |
1414 | vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT; |
1415 | ||
8fdd21a2 | 1416 | vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) & |
7b11dc99 | 1417 | ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); |
c6b3733b AG |
1418 | vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries; |
1419 | vcpu->arch.tlbcfg[1] |= | |
7b11dc99 | 1420 | vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT; |
da15bf43 | 1421 | |
cc902ad4 | 1422 | kvmppc_recalc_tlb1map_range(vcpu_e500); |
bc8080cb HB |
1423 | return 0; |
1424 | ||
0164c0f0 | 1425 | err: |
dc83b8bc | 1426 | free_gtlb(vcpu_e500); |
0164c0f0 SW |
1427 | kfree(vcpu_e500->tlb_refs[0]); |
1428 | kfree(vcpu_e500->tlb_refs[1]); | |
bc8080cb HB |
1429 | return -1; |
1430 | } | |
1431 | ||
1432 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) | |
1433 | { | |
dc83b8bc | 1434 | free_gtlb(vcpu_e500); |
4f802fe9 | 1435 | kfree(vcpu_e500->h2g_tlb1_rmap); |
0164c0f0 SW |
1436 | kfree(vcpu_e500->tlb_refs[0]); |
1437 | kfree(vcpu_e500->tlb_refs[1]); | |
bc8080cb | 1438 | } |