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740765ce SL |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. | |
7 | * Authors: Sanjay Lal <sanjayl@kymasys.com> | |
8 | */ | |
9 | ||
10 | #ifndef __MIPS_KVM_HOST_H__ | |
11 | #define __MIPS_KVM_HOST_H__ | |
12 | ||
13 | #include <linux/mutex.h> | |
14 | #include <linux/hrtimer.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/kvm.h> | |
18 | #include <linux/kvm_types.h> | |
19 | #include <linux/threads.h> | |
20 | #include <linux/spinlock.h> | |
21 | ||
48a3c4e4 JH |
22 | /* MIPS KVM register ids */ |
23 | #define MIPS_CP0_32(_R, _S) \ | |
24 | (KVM_REG_MIPS | KVM_REG_SIZE_U32 | 0x10000 | (8 * (_R) + (_S))) | |
25 | ||
26 | #define MIPS_CP0_64(_R, _S) \ | |
27 | (KVM_REG_MIPS | KVM_REG_SIZE_U64 | 0x10000 | (8 * (_R) + (_S))) | |
28 | ||
29 | #define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0) | |
30 | #define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0) | |
31 | #define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0) | |
32 | #define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0) | |
33 | #define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2) | |
34 | #define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0) | |
35 | #define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1) | |
36 | #define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0) | |
37 | #define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0) | |
38 | #define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0) | |
39 | #define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0) | |
40 | #define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0) | |
41 | #define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0) | |
42 | #define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0) | |
43 | #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0) | |
44 | #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0) | |
45 | #define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1) | |
46 | #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0) | |
47 | #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1) | |
48 | #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2) | |
49 | #define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3) | |
50 | #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7) | |
51 | #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) | |
52 | #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) | |
53 | ||
740765ce SL |
54 | |
55 | #define KVM_MAX_VCPUS 1 | |
56 | #define KVM_USER_MEM_SLOTS 8 | |
57 | /* memory slots that does not exposed to userspace */ | |
58 | #define KVM_PRIVATE_MEM_SLOTS 0 | |
59 | ||
60 | #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 | |
61 | ||
740765ce SL |
62 | |
63 | ||
64 | /* Special address that contains the comm page, used for reducing # of traps */ | |
22027945 | 65 | #define KVM_GUEST_COMMPAGE_ADDR 0x0 |
740765ce SL |
66 | |
67 | #define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \ | |
68 | ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0)) | |
69 | ||
22027945 JH |
70 | #define KVM_GUEST_KUSEG 0x00000000UL |
71 | #define KVM_GUEST_KSEG0 0x40000000UL | |
72 | #define KVM_GUEST_KSEG23 0x60000000UL | |
73 | #define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0x60000000) | |
74 | #define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff) | |
740765ce SL |
75 | |
76 | #define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) | |
77 | #define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) | |
78 | #define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) | |
79 | ||
80 | /* | |
81 | * Map an address to a certain kernel segment | |
82 | */ | |
83 | #define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) | |
84 | #define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) | |
85 | #define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) | |
86 | ||
22027945 JH |
87 | #define KVM_INVALID_PAGE 0xdeadbeef |
88 | #define KVM_INVALID_INST 0xdeadbeef | |
89 | #define KVM_INVALID_ADDR 0xdeadbeef | |
740765ce | 90 | |
22027945 | 91 | #define KVM_MALTA_GUEST_RTC_ADDR 0xb8000070UL |
740765ce | 92 | |
22027945 JH |
93 | #define GUEST_TICKS_PER_JIFFY (40000000/HZ) |
94 | #define MS_TO_NS(x) (x * 1E6L) | |
740765ce | 95 | |
22027945 JH |
96 | #define CAUSEB_DC 27 |
97 | #define CAUSEF_DC (_ULCAST_(1) << 27) | |
740765ce SL |
98 | |
99 | struct kvm; | |
100 | struct kvm_run; | |
101 | struct kvm_vcpu; | |
102 | struct kvm_interrupt; | |
103 | ||
104 | extern atomic_t kvm_mips_instance; | |
105 | extern pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn); | |
106 | extern void (*kvm_mips_release_pfn_clean) (pfn_t pfn); | |
107 | extern bool(*kvm_mips_is_error_pfn) (pfn_t pfn); | |
108 | ||
109 | struct kvm_vm_stat { | |
110 | u32 remote_tlb_flush; | |
111 | }; | |
112 | ||
113 | struct kvm_vcpu_stat { | |
114 | u32 wait_exits; | |
115 | u32 cache_exits; | |
116 | u32 signal_exits; | |
117 | u32 int_exits; | |
118 | u32 cop_unusable_exits; | |
119 | u32 tlbmod_exits; | |
120 | u32 tlbmiss_ld_exits; | |
121 | u32 tlbmiss_st_exits; | |
122 | u32 addrerr_st_exits; | |
123 | u32 addrerr_ld_exits; | |
124 | u32 syscall_exits; | |
125 | u32 resvd_inst_exits; | |
126 | u32 break_inst_exits; | |
127 | u32 flush_dcache_exits; | |
128 | u32 halt_wakeup; | |
129 | }; | |
130 | ||
131 | enum kvm_mips_exit_types { | |
132 | WAIT_EXITS, | |
133 | CACHE_EXITS, | |
134 | SIGNAL_EXITS, | |
135 | INT_EXITS, | |
136 | COP_UNUSABLE_EXITS, | |
137 | TLBMOD_EXITS, | |
138 | TLBMISS_LD_EXITS, | |
139 | TLBMISS_ST_EXITS, | |
140 | ADDRERR_ST_EXITS, | |
141 | ADDRERR_LD_EXITS, | |
142 | SYSCALL_EXITS, | |
143 | RESVD_INST_EXITS, | |
144 | BREAK_INST_EXITS, | |
145 | FLUSH_DCACHE_EXITS, | |
146 | MAX_KVM_MIPS_EXIT_TYPES | |
147 | }; | |
148 | ||
149 | struct kvm_arch_memory_slot { | |
150 | }; | |
151 | ||
152 | struct kvm_arch { | |
153 | /* Guest GVA->HPA page table */ | |
154 | unsigned long *guest_pmap; | |
155 | unsigned long guest_pmap_npages; | |
156 | ||
157 | /* Wired host TLB used for the commpage */ | |
158 | int commpage_tlb; | |
159 | }; | |
160 | ||
22027945 JH |
161 | #define N_MIPS_COPROC_REGS 32 |
162 | #define N_MIPS_COPROC_SEL 8 | |
740765ce SL |
163 | |
164 | struct mips_coproc { | |
165 | unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; | |
166 | #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS | |
167 | unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; | |
168 | #endif | |
169 | }; | |
170 | ||
171 | /* | |
172 | * Coprocessor 0 register names | |
173 | */ | |
22027945 JH |
174 | #define MIPS_CP0_TLB_INDEX 0 |
175 | #define MIPS_CP0_TLB_RANDOM 1 | |
176 | #define MIPS_CP0_TLB_LOW 2 | |
177 | #define MIPS_CP0_TLB_LO0 2 | |
178 | #define MIPS_CP0_TLB_LO1 3 | |
179 | #define MIPS_CP0_TLB_CONTEXT 4 | |
180 | #define MIPS_CP0_TLB_PG_MASK 5 | |
181 | #define MIPS_CP0_TLB_WIRED 6 | |
182 | #define MIPS_CP0_HWRENA 7 | |
183 | #define MIPS_CP0_BAD_VADDR 8 | |
184 | #define MIPS_CP0_COUNT 9 | |
185 | #define MIPS_CP0_TLB_HI 10 | |
186 | #define MIPS_CP0_COMPARE 11 | |
187 | #define MIPS_CP0_STATUS 12 | |
188 | #define MIPS_CP0_CAUSE 13 | |
189 | #define MIPS_CP0_EXC_PC 14 | |
190 | #define MIPS_CP0_PRID 15 | |
191 | #define MIPS_CP0_CONFIG 16 | |
192 | #define MIPS_CP0_LLADDR 17 | |
193 | #define MIPS_CP0_WATCH_LO 18 | |
194 | #define MIPS_CP0_WATCH_HI 19 | |
195 | #define MIPS_CP0_TLB_XCONTEXT 20 | |
196 | #define MIPS_CP0_ECC 26 | |
197 | #define MIPS_CP0_CACHE_ERR 27 | |
198 | #define MIPS_CP0_TAG_LO 28 | |
199 | #define MIPS_CP0_TAG_HI 29 | |
200 | #define MIPS_CP0_ERROR_PC 30 | |
201 | #define MIPS_CP0_DEBUG 23 | |
202 | #define MIPS_CP0_DEPC 24 | |
203 | #define MIPS_CP0_PERFCNT 25 | |
204 | #define MIPS_CP0_ERRCTL 26 | |
205 | #define MIPS_CP0_DATA_LO 28 | |
206 | #define MIPS_CP0_DATA_HI 29 | |
207 | #define MIPS_CP0_DESAVE 31 | |
208 | ||
209 | #define MIPS_CP0_CONFIG_SEL 0 | |
210 | #define MIPS_CP0_CONFIG1_SEL 1 | |
211 | #define MIPS_CP0_CONFIG2_SEL 2 | |
212 | #define MIPS_CP0_CONFIG3_SEL 3 | |
740765ce SL |
213 | |
214 | /* Config0 register bits */ | |
22027945 JH |
215 | #define CP0C0_M 31 |
216 | #define CP0C0_K23 28 | |
217 | #define CP0C0_KU 25 | |
218 | #define CP0C0_MDU 20 | |
219 | #define CP0C0_MM 17 | |
220 | #define CP0C0_BM 16 | |
221 | #define CP0C0_BE 15 | |
222 | #define CP0C0_AT 13 | |
223 | #define CP0C0_AR 10 | |
224 | #define CP0C0_MT 7 | |
225 | #define CP0C0_VI 3 | |
226 | #define CP0C0_K0 0 | |
740765ce SL |
227 | |
228 | /* Config1 register bits */ | |
22027945 JH |
229 | #define CP0C1_M 31 |
230 | #define CP0C1_MMU 25 | |
231 | #define CP0C1_IS 22 | |
232 | #define CP0C1_IL 19 | |
233 | #define CP0C1_IA 16 | |
234 | #define CP0C1_DS 13 | |
235 | #define CP0C1_DL 10 | |
236 | #define CP0C1_DA 7 | |
237 | #define CP0C1_C2 6 | |
238 | #define CP0C1_MD 5 | |
239 | #define CP0C1_PC 4 | |
240 | #define CP0C1_WR 3 | |
241 | #define CP0C1_CA 2 | |
242 | #define CP0C1_EP 1 | |
243 | #define CP0C1_FP 0 | |
740765ce SL |
244 | |
245 | /* Config2 Register bits */ | |
22027945 JH |
246 | #define CP0C2_M 31 |
247 | #define CP0C2_TU 28 | |
248 | #define CP0C2_TS 24 | |
249 | #define CP0C2_TL 20 | |
250 | #define CP0C2_TA 16 | |
251 | #define CP0C2_SU 12 | |
252 | #define CP0C2_SS 8 | |
253 | #define CP0C2_SL 4 | |
254 | #define CP0C2_SA 0 | |
740765ce SL |
255 | |
256 | /* Config3 Register bits */ | |
22027945 JH |
257 | #define CP0C3_M 31 |
258 | #define CP0C3_ISA_ON_EXC 16 | |
259 | #define CP0C3_ULRI 13 | |
260 | #define CP0C3_DSPP 10 | |
261 | #define CP0C3_LPA 7 | |
262 | #define CP0C3_VEIC 6 | |
263 | #define CP0C3_VInt 5 | |
264 | #define CP0C3_SP 4 | |
265 | #define CP0C3_MT 2 | |
266 | #define CP0C3_SM 1 | |
267 | #define CP0C3_TL 0 | |
740765ce SL |
268 | |
269 | /* Have config1, Cacheable, noncoherent, write-back, write allocate*/ | |
22027945 | 270 | #define MIPS_CONFIG0 \ |
740765ce SL |
271 | ((1 << CP0C0_M) | (0x3 << CP0C0_K0)) |
272 | ||
273 | /* Have config2, no coprocessor2 attached, no MDMX support attached, | |
274 | no performance counters, watch registers present, | |
275 | no code compression, EJTAG present, no FPU, no watch registers */ | |
22027945 JH |
276 | #define MIPS_CONFIG1 \ |
277 | ((1 << CP0C1_M) | \ | |
278 | (0 << CP0C1_C2) | (0 << CP0C1_MD) | (0 << CP0C1_PC) | \ | |
279 | (0 << CP0C1_WR) | (0 << CP0C1_CA) | (1 << CP0C1_EP) | \ | |
740765ce SL |
280 | (0 << CP0C1_FP)) |
281 | ||
282 | /* Have config3, no tertiary/secondary caches implemented */ | |
22027945 | 283 | #define MIPS_CONFIG2 \ |
740765ce SL |
284 | ((1 << CP0C2_M)) |
285 | ||
286 | /* No config4, no DSP ASE, no large physaddr (PABITS), | |
287 | no external interrupt controller, no vectored interrupts, | |
288 | no 1kb pages, no SmartMIPS ASE, no trace logic */ | |
22027945 JH |
289 | #define MIPS_CONFIG3 \ |
290 | ((0 << CP0C3_M) | (0 << CP0C3_DSPP) | (0 << CP0C3_LPA) | \ | |
291 | (0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \ | |
740765ce SL |
292 | (0 << CP0C3_SM) | (0 << CP0C3_TL)) |
293 | ||
294 | /* MMU types, the first four entries have the same layout as the | |
295 | CP0C0_MT field. */ | |
296 | enum mips_mmu_types { | |
297 | MMU_TYPE_NONE, | |
298 | MMU_TYPE_R4000, | |
299 | MMU_TYPE_RESERVED, | |
300 | MMU_TYPE_FMT, | |
301 | MMU_TYPE_R3000, | |
302 | MMU_TYPE_R6000, | |
303 | MMU_TYPE_R8000 | |
304 | }; | |
305 | ||
306 | /* | |
307 | * Trap codes | |
308 | */ | |
22027945 JH |
309 | #define T_INT 0 /* Interrupt pending */ |
310 | #define T_TLB_MOD 1 /* TLB modified fault */ | |
311 | #define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */ | |
312 | #define T_TLB_ST_MISS 3 /* TLB miss on a store */ | |
313 | #define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */ | |
314 | #define T_ADDR_ERR_ST 5 /* Address error on a store */ | |
315 | #define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */ | |
316 | #define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */ | |
317 | #define T_SYSCALL 8 /* System call */ | |
318 | #define T_BREAK 9 /* Breakpoint */ | |
319 | #define T_RES_INST 10 /* Reserved instruction exception */ | |
320 | #define T_COP_UNUSABLE 11 /* Coprocessor unusable */ | |
321 | #define T_OVFLOW 12 /* Arithmetic overflow */ | |
740765ce SL |
322 | |
323 | /* | |
324 | * Trap definitions added for r4000 port. | |
325 | */ | |
22027945 JH |
326 | #define T_TRAP 13 /* Trap instruction */ |
327 | #define T_VCEI 14 /* Virtual coherency exception */ | |
328 | #define T_FPE 15 /* Floating point exception */ | |
329 | #define T_WATCH 23 /* Watch address reference */ | |
330 | #define T_VCED 31 /* Virtual coherency data */ | |
740765ce SL |
331 | |
332 | /* Resume Flags */ | |
22027945 JH |
333 | #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */ |
334 | #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ | |
740765ce | 335 | |
22027945 JH |
336 | #define RESUME_GUEST 0 |
337 | #define RESUME_GUEST_DR RESUME_FLAG_DR | |
338 | #define RESUME_HOST RESUME_FLAG_HOST | |
740765ce SL |
339 | |
340 | enum emulation_result { | |
341 | EMULATE_DONE, /* no further processing */ | |
342 | EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */ | |
343 | EMULATE_FAIL, /* can't emulate this instruction */ | |
344 | EMULATE_WAIT, /* WAIT instruction */ | |
345 | EMULATE_PRIV_FAIL, | |
346 | }; | |
347 | ||
22027945 JH |
348 | #define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */ |
349 | #define MIPS3_PG_V 0x00000002 /* Valid */ | |
350 | #define MIPS3_PG_NV 0x00000000 | |
351 | #define MIPS3_PG_D 0x00000004 /* Dirty */ | |
740765ce SL |
352 | |
353 | #define mips3_paddr_to_tlbpfn(x) \ | |
22027945 | 354 | (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME) |
740765ce | 355 | #define mips3_tlbpfn_to_paddr(x) \ |
22027945 | 356 | ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT) |
740765ce | 357 | |
22027945 JH |
358 | #define MIPS3_PG_SHIFT 6 |
359 | #define MIPS3_PG_FRAME 0x3fffffc0 | |
740765ce | 360 | |
22027945 JH |
361 | #define VPN2_MASK 0xffffe000 |
362 | #define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \ | |
363 | ((x).tlb_lo1 & MIPS3_PG_G)) | |
364 | #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) | |
365 | #define TLB_ASID(x) ((x).tlb_hi & ASID_MASK) | |
366 | #define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \ | |
367 | ? ((x).tlb_lo1 & MIPS3_PG_V) \ | |
368 | : ((x).tlb_lo0 & MIPS3_PG_V)) | |
740765ce SL |
369 | |
370 | struct kvm_mips_tlb { | |
371 | long tlb_mask; | |
372 | long tlb_hi; | |
373 | long tlb_lo0; | |
374 | long tlb_lo1; | |
375 | }; | |
376 | ||
22027945 | 377 | #define KVM_MIPS_GUEST_TLB_SIZE 64 |
740765ce SL |
378 | struct kvm_vcpu_arch { |
379 | void *host_ebase, *guest_ebase; | |
380 | unsigned long host_stack; | |
381 | unsigned long host_gp; | |
382 | ||
383 | /* Host CP0 registers used when handling exits from guest */ | |
384 | unsigned long host_cp0_badvaddr; | |
385 | unsigned long host_cp0_cause; | |
386 | unsigned long host_cp0_epc; | |
387 | unsigned long host_cp0_entryhi; | |
388 | uint32_t guest_inst; | |
389 | ||
390 | /* GPRS */ | |
391 | unsigned long gprs[32]; | |
392 | unsigned long hi; | |
393 | unsigned long lo; | |
394 | unsigned long pc; | |
395 | ||
396 | /* FPU State */ | |
397 | struct mips_fpu_struct fpu; | |
398 | ||
399 | /* COP0 State */ | |
400 | struct mips_coproc *cop0; | |
401 | ||
402 | /* Host KSEG0 address of the EI/DI offset */ | |
403 | void *kseg0_commpage; | |
404 | ||
405 | u32 io_gpr; /* GPR used as IO source/target */ | |
406 | ||
e30492bb | 407 | struct hrtimer comparecount_timer; |
f8239342 JH |
408 | /* Count timer control KVM register */ |
409 | uint32_t count_ctl; | |
e30492bb JH |
410 | /* Count bias from the raw time */ |
411 | uint32_t count_bias; | |
412 | /* Frequency of timer in Hz */ | |
413 | uint32_t count_hz; | |
414 | /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */ | |
415 | s64 count_dyn_bias; | |
f8239342 JH |
416 | /* Resume time */ |
417 | ktime_t count_resume; | |
e30492bb JH |
418 | /* Period of timer tick in ns */ |
419 | u64 count_period; | |
740765ce SL |
420 | |
421 | /* Bitmask of exceptions that are pending */ | |
422 | unsigned long pending_exceptions; | |
423 | ||
424 | /* Bitmask of pending exceptions to be cleared */ | |
425 | unsigned long pending_exceptions_clr; | |
426 | ||
427 | unsigned long pending_load_cause; | |
428 | ||
429 | /* Save/Restore the entryhi register when are are preempted/scheduled back in */ | |
430 | unsigned long preempt_entryhi; | |
431 | ||
432 | /* S/W Based TLB for guest */ | |
433 | struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE]; | |
434 | ||
435 | /* Cached guest kernel/user ASIDs */ | |
436 | uint32_t guest_user_asid[NR_CPUS]; | |
437 | uint32_t guest_kernel_asid[NR_CPUS]; | |
438 | struct mm_struct guest_kernel_mm, guest_user_mm; | |
439 | ||
740765ce SL |
440 | int last_sched_cpu; |
441 | ||
442 | /* WAIT executed */ | |
443 | int wait; | |
444 | }; | |
445 | ||
446 | ||
22027945 JH |
447 | #define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0]) |
448 | #define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val) | |
449 | #define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0]) | |
450 | #define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0]) | |
451 | #define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0]) | |
452 | #define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val)) | |
453 | #define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2]) | |
7767b7d2 | 454 | #define kvm_write_c0_guest_userlocal(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2] = (val)) |
22027945 JH |
455 | #define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0]) |
456 | #define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val)) | |
457 | #define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0]) | |
458 | #define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val)) | |
26f4f3b5 JH |
459 | #define kvm_read_c0_guest_hwrena(cop0) (cop0->reg[MIPS_CP0_HWRENA][0]) |
460 | #define kvm_write_c0_guest_hwrena(cop0, val) (cop0->reg[MIPS_CP0_HWRENA][0] = (val)) | |
22027945 JH |
461 | #define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0]) |
462 | #define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val)) | |
463 | #define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0]) | |
464 | #define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val)) | |
465 | #define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0]) | |
466 | #define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val)) | |
467 | #define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0]) | |
468 | #define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val)) | |
469 | #define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0]) | |
470 | #define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val)) | |
471 | #define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1]) | |
472 | #define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val)) | |
473 | #define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0]) | |
474 | #define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val)) | |
475 | #define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0]) | |
476 | #define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val)) | |
477 | #define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0]) | |
478 | #define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val)) | |
479 | #define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1]) | |
480 | #define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val)) | |
481 | #define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0]) | |
482 | #define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1]) | |
483 | #define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2]) | |
484 | #define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3]) | |
485 | #define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7]) | |
486 | #define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val)) | |
487 | #define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val)) | |
488 | #define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val)) | |
489 | #define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val)) | |
490 | #define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val)) | |
491 | #define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0]) | |
492 | #define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val)) | |
493 | ||
c73c99b0 JH |
494 | /* |
495 | * Some of the guest registers may be modified asynchronously (e.g. from a | |
496 | * hrtimer callback in hard irq context) and therefore need stronger atomicity | |
497 | * guarantees than other registers. | |
498 | */ | |
499 | ||
500 | static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, | |
501 | unsigned long val) | |
502 | { | |
503 | unsigned long temp; | |
504 | do { | |
505 | __asm__ __volatile__( | |
506 | " .set mips3 \n" | |
507 | " " __LL "%0, %1 \n" | |
508 | " or %0, %2 \n" | |
509 | " " __SC "%0, %1 \n" | |
510 | " .set mips0 \n" | |
511 | : "=&r" (temp), "+m" (*reg) | |
512 | : "r" (val)); | |
513 | } while (unlikely(!temp)); | |
514 | } | |
515 | ||
516 | static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg, | |
517 | unsigned long val) | |
518 | { | |
519 | unsigned long temp; | |
520 | do { | |
521 | __asm__ __volatile__( | |
522 | " .set mips3 \n" | |
523 | " " __LL "%0, %1 \n" | |
524 | " and %0, %2 \n" | |
525 | " " __SC "%0, %1 \n" | |
526 | " .set mips0 \n" | |
527 | : "=&r" (temp), "+m" (*reg) | |
528 | : "r" (~val)); | |
529 | } while (unlikely(!temp)); | |
530 | } | |
531 | ||
532 | static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, | |
533 | unsigned long change, | |
534 | unsigned long val) | |
535 | { | |
536 | unsigned long temp; | |
537 | do { | |
538 | __asm__ __volatile__( | |
539 | " .set mips3 \n" | |
540 | " " __LL "%0, %1 \n" | |
541 | " and %0, %2 \n" | |
542 | " or %0, %3 \n" | |
543 | " " __SC "%0, %1 \n" | |
544 | " .set mips0 \n" | |
545 | : "=&r" (temp), "+m" (*reg) | |
546 | : "r" (~change), "r" (val & change)); | |
547 | } while (unlikely(!temp)); | |
548 | } | |
549 | ||
22027945 JH |
550 | #define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val)) |
551 | #define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val)) | |
c73c99b0 JH |
552 | |
553 | /* Cause can be modified asynchronously from hardirq hrtimer callback */ | |
554 | #define kvm_set_c0_guest_cause(cop0, val) \ | |
555 | _kvm_atomic_set_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) | |
556 | #define kvm_clear_c0_guest_cause(cop0, val) \ | |
557 | _kvm_atomic_clear_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) | |
22027945 | 558 | #define kvm_change_c0_guest_cause(cop0, change, val) \ |
c73c99b0 JH |
559 | _kvm_atomic_change_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], \ |
560 | change, val) | |
561 | ||
22027945 JH |
562 | #define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val)) |
563 | #define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val)) | |
564 | #define kvm_change_c0_guest_ebase(cop0, change, val) \ | |
565 | { \ | |
566 | kvm_clear_c0_guest_ebase(cop0, change); \ | |
567 | kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \ | |
740765ce SL |
568 | } |
569 | ||
570 | ||
571 | struct kvm_mips_callbacks { | |
572 | int (*handle_cop_unusable) (struct kvm_vcpu *vcpu); | |
573 | int (*handle_tlb_mod) (struct kvm_vcpu *vcpu); | |
574 | int (*handle_tlb_ld_miss) (struct kvm_vcpu *vcpu); | |
575 | int (*handle_tlb_st_miss) (struct kvm_vcpu *vcpu); | |
576 | int (*handle_addr_err_st) (struct kvm_vcpu *vcpu); | |
577 | int (*handle_addr_err_ld) (struct kvm_vcpu *vcpu); | |
578 | int (*handle_syscall) (struct kvm_vcpu *vcpu); | |
579 | int (*handle_res_inst) (struct kvm_vcpu *vcpu); | |
580 | int (*handle_break) (struct kvm_vcpu *vcpu); | |
581 | int (*vm_init) (struct kvm *kvm); | |
582 | int (*vcpu_init) (struct kvm_vcpu *vcpu); | |
583 | int (*vcpu_setup) (struct kvm_vcpu *vcpu); | |
584 | gpa_t(*gva_to_gpa) (gva_t gva); | |
585 | void (*queue_timer_int) (struct kvm_vcpu *vcpu); | |
586 | void (*dequeue_timer_int) (struct kvm_vcpu *vcpu); | |
587 | void (*queue_io_int) (struct kvm_vcpu *vcpu, | |
588 | struct kvm_mips_interrupt *irq); | |
589 | void (*dequeue_io_int) (struct kvm_vcpu *vcpu, | |
590 | struct kvm_mips_interrupt *irq); | |
591 | int (*irq_deliver) (struct kvm_vcpu *vcpu, unsigned int priority, | |
592 | uint32_t cause); | |
593 | int (*irq_clear) (struct kvm_vcpu *vcpu, unsigned int priority, | |
594 | uint32_t cause); | |
f8be02da JH |
595 | int (*get_one_reg)(struct kvm_vcpu *vcpu, |
596 | const struct kvm_one_reg *reg, s64 *v); | |
597 | int (*set_one_reg)(struct kvm_vcpu *vcpu, | |
598 | const struct kvm_one_reg *reg, s64 v); | |
740765ce SL |
599 | }; |
600 | extern struct kvm_mips_callbacks *kvm_mips_callbacks; | |
601 | int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks); | |
602 | ||
603 | /* Debug: dump vcpu state */ | |
604 | int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); | |
605 | ||
606 | /* Trampoline ASM routine to start running in "Guest" context */ | |
607 | extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu); | |
608 | ||
609 | /* TLB handling */ | |
610 | uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu); | |
611 | ||
612 | uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu); | |
613 | ||
614 | uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu); | |
615 | ||
616 | extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr, | |
617 | struct kvm_vcpu *vcpu); | |
618 | ||
619 | extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, | |
620 | struct kvm_vcpu *vcpu); | |
621 | ||
622 | extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, | |
623 | struct kvm_mips_tlb *tlb, | |
624 | unsigned long *hpa0, | |
625 | unsigned long *hpa1); | |
626 | ||
627 | extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, | |
628 | uint32_t *opc, | |
629 | struct kvm_run *run, | |
630 | struct kvm_vcpu *vcpu); | |
631 | ||
632 | extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, | |
633 | uint32_t *opc, | |
634 | struct kvm_run *run, | |
635 | struct kvm_vcpu *vcpu); | |
636 | ||
637 | extern void kvm_mips_dump_host_tlbs(void); | |
638 | extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu); | |
740765ce SL |
639 | extern void kvm_mips_flush_host_tlb(int skip_kseg0); |
640 | extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); | |
641 | extern int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index); | |
642 | ||
643 | extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, | |
644 | unsigned long entryhi); | |
645 | extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr); | |
646 | extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, | |
647 | unsigned long gva); | |
648 | extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, | |
649 | struct kvm_vcpu *vcpu); | |
740765ce | 650 | extern void kvm_local_flush_tlb_all(void); |
740765ce SL |
651 | extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu); |
652 | extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu); | |
653 | extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu); | |
654 | ||
655 | /* Emulation */ | |
656 | uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu); | |
657 | enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause); | |
658 | ||
659 | extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause, | |
660 | uint32_t *opc, | |
661 | struct kvm_run *run, | |
662 | struct kvm_vcpu *vcpu); | |
663 | ||
664 | extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, | |
665 | uint32_t *opc, | |
666 | struct kvm_run *run, | |
667 | struct kvm_vcpu *vcpu); | |
668 | ||
669 | extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, | |
670 | uint32_t *opc, | |
671 | struct kvm_run *run, | |
672 | struct kvm_vcpu *vcpu); | |
673 | ||
674 | extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, | |
675 | uint32_t *opc, | |
676 | struct kvm_run *run, | |
677 | struct kvm_vcpu *vcpu); | |
678 | ||
679 | extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, | |
680 | uint32_t *opc, | |
681 | struct kvm_run *run, | |
682 | struct kvm_vcpu *vcpu); | |
683 | ||
684 | extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, | |
685 | uint32_t *opc, | |
686 | struct kvm_run *run, | |
687 | struct kvm_vcpu *vcpu); | |
688 | ||
689 | extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, | |
690 | uint32_t *opc, | |
691 | struct kvm_run *run, | |
692 | struct kvm_vcpu *vcpu); | |
693 | ||
694 | extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, | |
695 | uint32_t *opc, | |
696 | struct kvm_run *run, | |
697 | struct kvm_vcpu *vcpu); | |
698 | ||
699 | extern enum emulation_result kvm_mips_handle_ri(unsigned long cause, | |
700 | uint32_t *opc, | |
701 | struct kvm_run *run, | |
702 | struct kvm_vcpu *vcpu); | |
703 | ||
704 | extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, | |
705 | uint32_t *opc, | |
706 | struct kvm_run *run, | |
707 | struct kvm_vcpu *vcpu); | |
708 | ||
709 | extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, | |
710 | uint32_t *opc, | |
711 | struct kvm_run *run, | |
712 | struct kvm_vcpu *vcpu); | |
713 | ||
714 | extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, | |
715 | struct kvm_run *run); | |
716 | ||
e30492bb JH |
717 | uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu); |
718 | void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count); | |
719 | void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare); | |
720 | void kvm_mips_init_count(struct kvm_vcpu *vcpu); | |
f8239342 JH |
721 | int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl); |
722 | int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume); | |
e30492bb JH |
723 | void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu); |
724 | void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu); | |
725 | enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu); | |
740765ce SL |
726 | |
727 | enum emulation_result kvm_mips_check_privilege(unsigned long cause, | |
728 | uint32_t *opc, | |
729 | struct kvm_run *run, | |
730 | struct kvm_vcpu *vcpu); | |
731 | ||
732 | enum emulation_result kvm_mips_emulate_cache(uint32_t inst, | |
733 | uint32_t *opc, | |
734 | uint32_t cause, | |
735 | struct kvm_run *run, | |
736 | struct kvm_vcpu *vcpu); | |
737 | enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, | |
738 | uint32_t *opc, | |
739 | uint32_t cause, | |
740 | struct kvm_run *run, | |
741 | struct kvm_vcpu *vcpu); | |
742 | enum emulation_result kvm_mips_emulate_store(uint32_t inst, | |
743 | uint32_t cause, | |
744 | struct kvm_run *run, | |
745 | struct kvm_vcpu *vcpu); | |
746 | enum emulation_result kvm_mips_emulate_load(uint32_t inst, | |
747 | uint32_t cause, | |
748 | struct kvm_run *run, | |
749 | struct kvm_vcpu *vcpu); | |
750 | ||
751 | /* Dynamic binary translation */ | |
752 | extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc, | |
753 | struct kvm_vcpu *vcpu); | |
754 | extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc, | |
755 | struct kvm_vcpu *vcpu); | |
756 | extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, | |
757 | struct kvm_vcpu *vcpu); | |
758 | extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, | |
759 | struct kvm_vcpu *vcpu); | |
760 | ||
761 | /* Misc */ | |
740765ce SL |
762 | extern int kvm_mips_dump_stats(struct kvm_vcpu *vcpu); |
763 | extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm); | |
764 | ||
765 | ||
766 | #endif /* __MIPS_KVM_HOST_H__ */ |