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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
22/* MIPS KVM register ids */
23#define MIPS_CP0_32(_R, _S) \
24 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S)))
25
26#define MIPS_CP0_64(_R, _S) \
27 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (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_PRID MIPS_CP0_32(15, 0)
46#define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1)
47#define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0)
48#define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1)
49#define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2)
50#define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3)
51#define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4)
52#define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5)
53#define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7)
54#define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0)
55#define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0)
56
57
58#define KVM_MAX_VCPUS 1
59#define KVM_USER_MEM_SLOTS 8
60/* memory slots that does not exposed to userspace */
61#define KVM_PRIVATE_MEM_SLOTS 0
62
63#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
64#define KVM_HALT_POLL_NS_DEFAULT 500000
65
66
67
68/* Special address that contains the comm page, used for reducing # of traps */
69#define KVM_GUEST_COMMPAGE_ADDR 0x0
70
71#define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \
72 ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0))
73
74#define KVM_GUEST_KUSEG 0x00000000UL
75#define KVM_GUEST_KSEG0 0x40000000UL
76#define KVM_GUEST_KSEG23 0x60000000UL
77#define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0x60000000)
78#define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
79
80#define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
81#define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
82#define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
83
84/*
85 * Map an address to a certain kernel segment
86 */
87#define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
88#define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
89#define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
90
91#define KVM_INVALID_PAGE 0xdeadbeef
92#define KVM_INVALID_INST 0xdeadbeef
93#define KVM_INVALID_ADDR 0xdeadbeef
94
95extern atomic_t kvm_mips_instance;
96extern kvm_pfn_t (*kvm_mips_gfn_to_pfn)(struct kvm *kvm, gfn_t gfn);
97extern void (*kvm_mips_release_pfn_clean)(kvm_pfn_t pfn);
98extern bool (*kvm_mips_is_error_pfn)(kvm_pfn_t pfn);
99
100struct kvm_vm_stat {
101 u32 remote_tlb_flush;
102};
103
104struct kvm_vcpu_stat {
105 u32 wait_exits;
106 u32 cache_exits;
107 u32 signal_exits;
108 u32 int_exits;
109 u32 cop_unusable_exits;
110 u32 tlbmod_exits;
111 u32 tlbmiss_ld_exits;
112 u32 tlbmiss_st_exits;
113 u32 addrerr_st_exits;
114 u32 addrerr_ld_exits;
115 u32 syscall_exits;
116 u32 resvd_inst_exits;
117 u32 break_inst_exits;
118 u32 trap_inst_exits;
119 u32 msa_fpe_exits;
120 u32 fpe_exits;
121 u32 msa_disabled_exits;
122 u32 flush_dcache_exits;
123 u32 halt_successful_poll;
124 u32 halt_attempted_poll;
125 u32 halt_wakeup;
126};
127
128enum kvm_mips_exit_types {
129 WAIT_EXITS,
130 CACHE_EXITS,
131 SIGNAL_EXITS,
132 INT_EXITS,
133 COP_UNUSABLE_EXITS,
134 TLBMOD_EXITS,
135 TLBMISS_LD_EXITS,
136 TLBMISS_ST_EXITS,
137 ADDRERR_ST_EXITS,
138 ADDRERR_LD_EXITS,
139 SYSCALL_EXITS,
140 RESVD_INST_EXITS,
141 BREAK_INST_EXITS,
142 TRAP_INST_EXITS,
143 MSA_FPE_EXITS,
144 FPE_EXITS,
145 MSA_DISABLED_EXITS,
146 FLUSH_DCACHE_EXITS,
147 MAX_KVM_MIPS_EXIT_TYPES
148};
149
150struct kvm_arch_memory_slot {
151};
152
153struct kvm_arch {
154 /* Guest GVA->HPA page table */
155 unsigned long *guest_pmap;
156 unsigned long guest_pmap_npages;
157
158 /* Wired host TLB used for the commpage */
159 int commpage_tlb;
160};
161
162#define N_MIPS_COPROC_REGS 32
163#define N_MIPS_COPROC_SEL 8
164
165struct mips_coproc {
166 unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
167#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
168 unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
169#endif
170};
171
172/*
173 * Coprocessor 0 register names
174 */
175#define MIPS_CP0_TLB_INDEX 0
176#define MIPS_CP0_TLB_RANDOM 1
177#define MIPS_CP0_TLB_LOW 2
178#define MIPS_CP0_TLB_LO0 2
179#define MIPS_CP0_TLB_LO1 3
180#define MIPS_CP0_TLB_CONTEXT 4
181#define MIPS_CP0_TLB_PG_MASK 5
182#define MIPS_CP0_TLB_WIRED 6
183#define MIPS_CP0_HWRENA 7
184#define MIPS_CP0_BAD_VADDR 8
185#define MIPS_CP0_COUNT 9
186#define MIPS_CP0_TLB_HI 10
187#define MIPS_CP0_COMPARE 11
188#define MIPS_CP0_STATUS 12
189#define MIPS_CP0_CAUSE 13
190#define MIPS_CP0_EXC_PC 14
191#define MIPS_CP0_PRID 15
192#define MIPS_CP0_CONFIG 16
193#define MIPS_CP0_LLADDR 17
194#define MIPS_CP0_WATCH_LO 18
195#define MIPS_CP0_WATCH_HI 19
196#define MIPS_CP0_TLB_XCONTEXT 20
197#define MIPS_CP0_ECC 26
198#define MIPS_CP0_CACHE_ERR 27
199#define MIPS_CP0_TAG_LO 28
200#define MIPS_CP0_TAG_HI 29
201#define MIPS_CP0_ERROR_PC 30
202#define MIPS_CP0_DEBUG 23
203#define MIPS_CP0_DEPC 24
204#define MIPS_CP0_PERFCNT 25
205#define MIPS_CP0_ERRCTL 26
206#define MIPS_CP0_DATA_LO 28
207#define MIPS_CP0_DATA_HI 29
208#define MIPS_CP0_DESAVE 31
209
210#define MIPS_CP0_CONFIG_SEL 0
211#define MIPS_CP0_CONFIG1_SEL 1
212#define MIPS_CP0_CONFIG2_SEL 2
213#define MIPS_CP0_CONFIG3_SEL 3
214#define MIPS_CP0_CONFIG4_SEL 4
215#define MIPS_CP0_CONFIG5_SEL 5
216
217/* Config0 register bits */
218#define CP0C0_M 31
219#define CP0C0_K23 28
220#define CP0C0_KU 25
221#define CP0C0_MDU 20
222#define CP0C0_MM 17
223#define CP0C0_BM 16
224#define CP0C0_BE 15
225#define CP0C0_AT 13
226#define CP0C0_AR 10
227#define CP0C0_MT 7
228#define CP0C0_VI 3
229#define CP0C0_K0 0
230
231/* Config1 register bits */
232#define CP0C1_M 31
233#define CP0C1_MMU 25
234#define CP0C1_IS 22
235#define CP0C1_IL 19
236#define CP0C1_IA 16
237#define CP0C1_DS 13
238#define CP0C1_DL 10
239#define CP0C1_DA 7
240#define CP0C1_C2 6
241#define CP0C1_MD 5
242#define CP0C1_PC 4
243#define CP0C1_WR 3
244#define CP0C1_CA 2
245#define CP0C1_EP 1
246#define CP0C1_FP 0
247
248/* Config2 Register bits */
249#define CP0C2_M 31
250#define CP0C2_TU 28
251#define CP0C2_TS 24
252#define CP0C2_TL 20
253#define CP0C2_TA 16
254#define CP0C2_SU 12
255#define CP0C2_SS 8
256#define CP0C2_SL 4
257#define CP0C2_SA 0
258
259/* Config3 Register bits */
260#define CP0C3_M 31
261#define CP0C3_ISA_ON_EXC 16
262#define CP0C3_ULRI 13
263#define CP0C3_DSPP 10
264#define CP0C3_LPA 7
265#define CP0C3_VEIC 6
266#define CP0C3_VInt 5
267#define CP0C3_SP 4
268#define CP0C3_MT 2
269#define CP0C3_SM 1
270#define CP0C3_TL 0
271
272/* MMU types, the first four entries have the same layout as the
273 CP0C0_MT field. */
274enum mips_mmu_types {
275 MMU_TYPE_NONE,
276 MMU_TYPE_R4000,
277 MMU_TYPE_RESERVED,
278 MMU_TYPE_FMT,
279 MMU_TYPE_R3000,
280 MMU_TYPE_R6000,
281 MMU_TYPE_R8000
282};
283
284/* Resume Flags */
285#define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */
286#define RESUME_FLAG_HOST (1<<1) /* Resume host? */
287
288#define RESUME_GUEST 0
289#define RESUME_GUEST_DR RESUME_FLAG_DR
290#define RESUME_HOST RESUME_FLAG_HOST
291
292enum emulation_result {
293 EMULATE_DONE, /* no further processing */
294 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
295 EMULATE_FAIL, /* can't emulate this instruction */
296 EMULATE_WAIT, /* WAIT instruction */
297 EMULATE_PRIV_FAIL,
298};
299
300#define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */
301#define MIPS3_PG_V 0x00000002 /* Valid */
302#define MIPS3_PG_NV 0x00000000
303#define MIPS3_PG_D 0x00000004 /* Dirty */
304
305#define mips3_paddr_to_tlbpfn(x) \
306 (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME)
307#define mips3_tlbpfn_to_paddr(x) \
308 ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT)
309
310#define MIPS3_PG_SHIFT 6
311#define MIPS3_PG_FRAME 0x3fffffc0
312
313#define VPN2_MASK 0xffffe000
314#define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \
315 ((x).tlb_lo1 & MIPS3_PG_G))
316#define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK)
317#define TLB_ASID(x) ((x).tlb_hi & ASID_MASK)
318#define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \
319 ? ((x).tlb_lo1 & MIPS3_PG_V) \
320 : ((x).tlb_lo0 & MIPS3_PG_V))
321#define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \
322 ((y) & VPN2_MASK & ~(x).tlb_mask))
323#define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \
324 TLB_ASID(x) == ((y) & ASID_MASK))
325
326struct kvm_mips_tlb {
327 long tlb_mask;
328 long tlb_hi;
329 long tlb_lo0;
330 long tlb_lo1;
331};
332
333#define KVM_MIPS_FPU_FPU 0x1
334#define KVM_MIPS_FPU_MSA 0x2
335
336#define KVM_MIPS_GUEST_TLB_SIZE 64
337struct kvm_vcpu_arch {
338 void *host_ebase, *guest_ebase;
339 unsigned long host_stack;
340 unsigned long host_gp;
341
342 /* Host CP0 registers used when handling exits from guest */
343 unsigned long host_cp0_badvaddr;
344 unsigned long host_cp0_cause;
345 unsigned long host_cp0_epc;
346 unsigned long host_cp0_entryhi;
347 uint32_t guest_inst;
348
349 /* GPRS */
350 unsigned long gprs[32];
351 unsigned long hi;
352 unsigned long lo;
353 unsigned long pc;
354
355 /* FPU State */
356 struct mips_fpu_struct fpu;
357 /* Which FPU state is loaded (KVM_MIPS_FPU_*) */
358 unsigned int fpu_inuse;
359
360 /* COP0 State */
361 struct mips_coproc *cop0;
362
363 /* Host KSEG0 address of the EI/DI offset */
364 void *kseg0_commpage;
365
366 u32 io_gpr; /* GPR used as IO source/target */
367
368 struct hrtimer comparecount_timer;
369 /* Count timer control KVM register */
370 uint32_t count_ctl;
371 /* Count bias from the raw time */
372 uint32_t count_bias;
373 /* Frequency of timer in Hz */
374 uint32_t count_hz;
375 /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */
376 s64 count_dyn_bias;
377 /* Resume time */
378 ktime_t count_resume;
379 /* Period of timer tick in ns */
380 u64 count_period;
381
382 /* Bitmask of exceptions that are pending */
383 unsigned long pending_exceptions;
384
385 /* Bitmask of pending exceptions to be cleared */
386 unsigned long pending_exceptions_clr;
387
388 unsigned long pending_load_cause;
389
390 /* Save/Restore the entryhi register when are are preempted/scheduled back in */
391 unsigned long preempt_entryhi;
392
393 /* S/W Based TLB for guest */
394 struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE];
395
396 /* Cached guest kernel/user ASIDs */
397 uint32_t guest_user_asid[NR_CPUS];
398 uint32_t guest_kernel_asid[NR_CPUS];
399 struct mm_struct guest_kernel_mm, guest_user_mm;
400
401 int last_sched_cpu;
402
403 /* WAIT executed */
404 int wait;
405
406 u8 fpu_enabled;
407 u8 msa_enabled;
408};
409
410
411#define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0])
412#define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val)
413#define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0])
414#define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0])
415#define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0])
416#define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val))
417#define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2])
418#define kvm_write_c0_guest_userlocal(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2] = (val))
419#define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0])
420#define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val))
421#define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0])
422#define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val))
423#define kvm_read_c0_guest_hwrena(cop0) (cop0->reg[MIPS_CP0_HWRENA][0])
424#define kvm_write_c0_guest_hwrena(cop0, val) (cop0->reg[MIPS_CP0_HWRENA][0] = (val))
425#define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0])
426#define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val))
427#define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0])
428#define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val))
429#define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0])
430#define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val))
431#define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0])
432#define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val))
433#define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0])
434#define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val))
435#define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1])
436#define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val))
437#define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0])
438#define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val))
439#define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0])
440#define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val))
441#define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0])
442#define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val))
443#define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1])
444#define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val))
445#define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0])
446#define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1])
447#define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2])
448#define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3])
449#define kvm_read_c0_guest_config4(cop0) (cop0->reg[MIPS_CP0_CONFIG][4])
450#define kvm_read_c0_guest_config5(cop0) (cop0->reg[MIPS_CP0_CONFIG][5])
451#define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7])
452#define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val))
453#define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val))
454#define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val))
455#define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val))
456#define kvm_write_c0_guest_config4(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][4] = (val))
457#define kvm_write_c0_guest_config5(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][5] = (val))
458#define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val))
459#define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0])
460#define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val))
461
462/*
463 * Some of the guest registers may be modified asynchronously (e.g. from a
464 * hrtimer callback in hard irq context) and therefore need stronger atomicity
465 * guarantees than other registers.
466 */
467
468static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg,
469 unsigned long val)
470{
471 unsigned long temp;
472 do {
473 __asm__ __volatile__(
474 " .set mips3 \n"
475 " " __LL "%0, %1 \n"
476 " or %0, %2 \n"
477 " " __SC "%0, %1 \n"
478 " .set mips0 \n"
479 : "=&r" (temp), "+m" (*reg)
480 : "r" (val));
481 } while (unlikely(!temp));
482}
483
484static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg,
485 unsigned long val)
486{
487 unsigned long temp;
488 do {
489 __asm__ __volatile__(
490 " .set mips3 \n"
491 " " __LL "%0, %1 \n"
492 " and %0, %2 \n"
493 " " __SC "%0, %1 \n"
494 " .set mips0 \n"
495 : "=&r" (temp), "+m" (*reg)
496 : "r" (~val));
497 } while (unlikely(!temp));
498}
499
500static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg,
501 unsigned long change,
502 unsigned long val)
503{
504 unsigned long temp;
505 do {
506 __asm__ __volatile__(
507 " .set mips3 \n"
508 " " __LL "%0, %1 \n"
509 " and %0, %2 \n"
510 " or %0, %3 \n"
511 " " __SC "%0, %1 \n"
512 " .set mips0 \n"
513 : "=&r" (temp), "+m" (*reg)
514 : "r" (~change), "r" (val & change));
515 } while (unlikely(!temp));
516}
517
518#define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val))
519#define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val))
520
521/* Cause can be modified asynchronously from hardirq hrtimer callback */
522#define kvm_set_c0_guest_cause(cop0, val) \
523 _kvm_atomic_set_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val)
524#define kvm_clear_c0_guest_cause(cop0, val) \
525 _kvm_atomic_clear_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val)
526#define kvm_change_c0_guest_cause(cop0, change, val) \
527 _kvm_atomic_change_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], \
528 change, val)
529
530#define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val))
531#define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val))
532#define kvm_change_c0_guest_ebase(cop0, change, val) \
533{ \
534 kvm_clear_c0_guest_ebase(cop0, change); \
535 kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \
536}
537
538/* Helpers */
539
540static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu)
541{
542 return (!__builtin_constant_p(cpu_has_fpu) || cpu_has_fpu) &&
543 vcpu->fpu_enabled;
544}
545
546static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu)
547{
548 return kvm_mips_guest_can_have_fpu(vcpu) &&
549 kvm_read_c0_guest_config1(vcpu->cop0) & MIPS_CONF1_FP;
550}
551
552static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu)
553{
554 return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) &&
555 vcpu->msa_enabled;
556}
557
558static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu)
559{
560 return kvm_mips_guest_can_have_msa(vcpu) &&
561 kvm_read_c0_guest_config3(vcpu->cop0) & MIPS_CONF3_MSA;
562}
563
564struct kvm_mips_callbacks {
565 int (*handle_cop_unusable)(struct kvm_vcpu *vcpu);
566 int (*handle_tlb_mod)(struct kvm_vcpu *vcpu);
567 int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu);
568 int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu);
569 int (*handle_addr_err_st)(struct kvm_vcpu *vcpu);
570 int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu);
571 int (*handle_syscall)(struct kvm_vcpu *vcpu);
572 int (*handle_res_inst)(struct kvm_vcpu *vcpu);
573 int (*handle_break)(struct kvm_vcpu *vcpu);
574 int (*handle_trap)(struct kvm_vcpu *vcpu);
575 int (*handle_msa_fpe)(struct kvm_vcpu *vcpu);
576 int (*handle_fpe)(struct kvm_vcpu *vcpu);
577 int (*handle_msa_disabled)(struct kvm_vcpu *vcpu);
578 int (*vm_init)(struct kvm *kvm);
579 int (*vcpu_init)(struct kvm_vcpu *vcpu);
580 int (*vcpu_setup)(struct kvm_vcpu *vcpu);
581 gpa_t (*gva_to_gpa)(gva_t gva);
582 void (*queue_timer_int)(struct kvm_vcpu *vcpu);
583 void (*dequeue_timer_int)(struct kvm_vcpu *vcpu);
584 void (*queue_io_int)(struct kvm_vcpu *vcpu,
585 struct kvm_mips_interrupt *irq);
586 void (*dequeue_io_int)(struct kvm_vcpu *vcpu,
587 struct kvm_mips_interrupt *irq);
588 int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority,
589 uint32_t cause);
590 int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority,
591 uint32_t cause);
592 int (*get_one_reg)(struct kvm_vcpu *vcpu,
593 const struct kvm_one_reg *reg, s64 *v);
594 int (*set_one_reg)(struct kvm_vcpu *vcpu,
595 const struct kvm_one_reg *reg, s64 v);
596 int (*vcpu_get_regs)(struct kvm_vcpu *vcpu);
597 int (*vcpu_set_regs)(struct kvm_vcpu *vcpu);
598};
599extern struct kvm_mips_callbacks *kvm_mips_callbacks;
600int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
601
602/* Debug: dump vcpu state */
603int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
604
605/* Trampoline ASM routine to start running in "Guest" context */
606extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu);
607
608/* FPU/MSA context management */
609void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu);
610void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu);
611void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu);
612void __kvm_save_msa(struct kvm_vcpu_arch *vcpu);
613void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu);
614void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu);
615void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu);
616void kvm_own_fpu(struct kvm_vcpu *vcpu);
617void kvm_own_msa(struct kvm_vcpu *vcpu);
618void kvm_drop_fpu(struct kvm_vcpu *vcpu);
619void kvm_lose_fpu(struct kvm_vcpu *vcpu);
620
621/* TLB handling */
622uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu);
623
624uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu);
625
626uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu);
627
628extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr,
629 struct kvm_vcpu *vcpu);
630
631extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
632 struct kvm_vcpu *vcpu);
633
634extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
635 struct kvm_mips_tlb *tlb,
636 unsigned long *hpa0,
637 unsigned long *hpa1);
638
639extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause,
640 uint32_t *opc,
641 struct kvm_run *run,
642 struct kvm_vcpu *vcpu);
643
644extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause,
645 uint32_t *opc,
646 struct kvm_run *run,
647 struct kvm_vcpu *vcpu);
648
649extern void kvm_mips_dump_host_tlbs(void);
650extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu);
651extern void kvm_mips_flush_host_tlb(int skip_kseg0);
652extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi);
653
654extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu,
655 unsigned long entryhi);
656extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr);
657extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
658 unsigned long gva);
659extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
660 struct kvm_vcpu *vcpu);
661extern void kvm_local_flush_tlb_all(void);
662extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu);
663extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
664extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu);
665
666/* Emulation */
667uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu);
668enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause);
669
670extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause,
671 uint32_t *opc,
672 struct kvm_run *run,
673 struct kvm_vcpu *vcpu);
674
675extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause,
676 uint32_t *opc,
677 struct kvm_run *run,
678 struct kvm_vcpu *vcpu);
679
680extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause,
681 uint32_t *opc,
682 struct kvm_run *run,
683 struct kvm_vcpu *vcpu);
684
685extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause,
686 uint32_t *opc,
687 struct kvm_run *run,
688 struct kvm_vcpu *vcpu);
689
690extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause,
691 uint32_t *opc,
692 struct kvm_run *run,
693 struct kvm_vcpu *vcpu);
694
695extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause,
696 uint32_t *opc,
697 struct kvm_run *run,
698 struct kvm_vcpu *vcpu);
699
700extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause,
701 uint32_t *opc,
702 struct kvm_run *run,
703 struct kvm_vcpu *vcpu);
704
705extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause,
706 uint32_t *opc,
707 struct kvm_run *run,
708 struct kvm_vcpu *vcpu);
709
710extern enum emulation_result kvm_mips_handle_ri(unsigned long cause,
711 uint32_t *opc,
712 struct kvm_run *run,
713 struct kvm_vcpu *vcpu);
714
715extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause,
716 uint32_t *opc,
717 struct kvm_run *run,
718 struct kvm_vcpu *vcpu);
719
720extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause,
721 uint32_t *opc,
722 struct kvm_run *run,
723 struct kvm_vcpu *vcpu);
724
725extern enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause,
726 uint32_t *opc,
727 struct kvm_run *run,
728 struct kvm_vcpu *vcpu);
729
730extern enum emulation_result kvm_mips_emulate_msafpe_exc(unsigned long cause,
731 uint32_t *opc,
732 struct kvm_run *run,
733 struct kvm_vcpu *vcpu);
734
735extern enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause,
736 uint32_t *opc,
737 struct kvm_run *run,
738 struct kvm_vcpu *vcpu);
739
740extern enum emulation_result kvm_mips_emulate_msadis_exc(unsigned long cause,
741 uint32_t *opc,
742 struct kvm_run *run,
743 struct kvm_vcpu *vcpu);
744
745extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
746 struct kvm_run *run);
747
748uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu);
749void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count);
750void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare);
751void kvm_mips_init_count(struct kvm_vcpu *vcpu);
752int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl);
753int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume);
754int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz);
755void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu);
756void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu);
757enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu);
758
759enum emulation_result kvm_mips_check_privilege(unsigned long cause,
760 uint32_t *opc,
761 struct kvm_run *run,
762 struct kvm_vcpu *vcpu);
763
764enum emulation_result kvm_mips_emulate_cache(uint32_t inst,
765 uint32_t *opc,
766 uint32_t cause,
767 struct kvm_run *run,
768 struct kvm_vcpu *vcpu);
769enum emulation_result kvm_mips_emulate_CP0(uint32_t inst,
770 uint32_t *opc,
771 uint32_t cause,
772 struct kvm_run *run,
773 struct kvm_vcpu *vcpu);
774enum emulation_result kvm_mips_emulate_store(uint32_t inst,
775 uint32_t cause,
776 struct kvm_run *run,
777 struct kvm_vcpu *vcpu);
778enum emulation_result kvm_mips_emulate_load(uint32_t inst,
779 uint32_t cause,
780 struct kvm_run *run,
781 struct kvm_vcpu *vcpu);
782
783unsigned int kvm_mips_config1_wrmask(struct kvm_vcpu *vcpu);
784unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu);
785unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu);
786unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu);
787
788/* Dynamic binary translation */
789extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
790 struct kvm_vcpu *vcpu);
791extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
792 struct kvm_vcpu *vcpu);
793extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc,
794 struct kvm_vcpu *vcpu);
795extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc,
796 struct kvm_vcpu *vcpu);
797
798/* Misc */
799extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu);
800extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm);
801
802static inline void kvm_arch_hardware_disable(void) {}
803static inline void kvm_arch_hardware_unsetup(void) {}
804static inline void kvm_arch_sync_events(struct kvm *kvm) {}
805static inline void kvm_arch_free_memslot(struct kvm *kvm,
806 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
807static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
808static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
809static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
810 struct kvm_memory_slot *slot) {}
811static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
812static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
813static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
814static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
815
816#endif /* __MIPS_KVM_HOST_H__ */
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/cpumask.h>
14#include <linux/mutex.h>
15#include <linux/hrtimer.h>
16#include <linux/interrupt.h>
17#include <linux/types.h>
18#include <linux/kvm.h>
19#include <linux/kvm_types.h>
20#include <linux/threads.h>
21#include <linux/spinlock.h>
22
23#include <asm/inst.h>
24#include <asm/mipsregs.h>
25
26/* MIPS KVM register ids */
27#define MIPS_CP0_32(_R, _S) \
28 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S)))
29
30#define MIPS_CP0_64(_R, _S) \
31 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S)))
32
33#define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0)
34#define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0)
35#define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0)
36#define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0)
37#define KVM_REG_MIPS_CP0_CONTEXTCONFIG MIPS_CP0_32(4, 1)
38#define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2)
39#define KVM_REG_MIPS_CP0_XCONTEXTCONFIG MIPS_CP0_64(4, 3)
40#define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0)
41#define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1)
42#define KVM_REG_MIPS_CP0_SEGCTL0 MIPS_CP0_64(5, 2)
43#define KVM_REG_MIPS_CP0_SEGCTL1 MIPS_CP0_64(5, 3)
44#define KVM_REG_MIPS_CP0_SEGCTL2 MIPS_CP0_64(5, 4)
45#define KVM_REG_MIPS_CP0_PWBASE MIPS_CP0_64(5, 5)
46#define KVM_REG_MIPS_CP0_PWFIELD MIPS_CP0_64(5, 6)
47#define KVM_REG_MIPS_CP0_PWSIZE MIPS_CP0_64(5, 7)
48#define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0)
49#define KVM_REG_MIPS_CP0_PWCTL MIPS_CP0_32(6, 6)
50#define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0)
51#define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0)
52#define KVM_REG_MIPS_CP0_BADINSTR MIPS_CP0_32(8, 1)
53#define KVM_REG_MIPS_CP0_BADINSTRP MIPS_CP0_32(8, 2)
54#define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0)
55#define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0)
56#define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0)
57#define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0)
58#define KVM_REG_MIPS_CP0_INTCTL MIPS_CP0_32(12, 1)
59#define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0)
60#define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0)
61#define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0)
62#define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1)
63#define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0)
64#define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1)
65#define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2)
66#define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3)
67#define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4)
68#define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5)
69#define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7)
70#define KVM_REG_MIPS_CP0_MAARI MIPS_CP0_64(17, 2)
71#define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0)
72#define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0)
73#define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2)
74#define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3)
75#define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4)
76#define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5)
77#define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6)
78#define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7)
79
80
81#define KVM_MAX_VCPUS 8
82#define KVM_USER_MEM_SLOTS 8
83/* memory slots that does not exposed to userspace */
84#define KVM_PRIVATE_MEM_SLOTS 0
85
86#define KVM_HALT_POLL_NS_DEFAULT 500000
87
88#ifdef CONFIG_KVM_MIPS_VZ
89extern unsigned long GUESTID_MASK;
90extern unsigned long GUESTID_FIRST_VERSION;
91extern unsigned long GUESTID_VERSION_MASK;
92#endif
93
94
95/*
96 * Special address that contains the comm page, used for reducing # of traps
97 * This needs to be within 32Kb of 0x0 (so the zero register can be used), but
98 * preferably not at 0x0 so that most kernel NULL pointer dereferences can be
99 * caught.
100 */
101#define KVM_GUEST_COMMPAGE_ADDR ((PAGE_SIZE > 0x8000) ? 0 : \
102 (0x8000 - PAGE_SIZE))
103
104#define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \
105 ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0))
106
107#define KVM_GUEST_KUSEG 0x00000000UL
108#define KVM_GUEST_KSEG0 0x40000000UL
109#define KVM_GUEST_KSEG1 0x40000000UL
110#define KVM_GUEST_KSEG23 0x60000000UL
111#define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0xe0000000)
112#define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
113
114#define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
115#define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
116#define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
117
118/*
119 * Map an address to a certain kernel segment
120 */
121#define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
122#define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
123#define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
124
125#define KVM_INVALID_PAGE 0xdeadbeef
126#define KVM_INVALID_ADDR 0xdeadbeef
127
128/*
129 * EVA has overlapping user & kernel address spaces, so user VAs may be >
130 * PAGE_OFFSET. For this reason we can't use the default KVM_HVA_ERR_BAD of
131 * PAGE_OFFSET.
132 */
133
134#define KVM_HVA_ERR_BAD (-1UL)
135#define KVM_HVA_ERR_RO_BAD (-2UL)
136
137static inline bool kvm_is_error_hva(unsigned long addr)
138{
139 return IS_ERR_VALUE(addr);
140}
141
142struct kvm_vm_stat {
143 ulong remote_tlb_flush;
144};
145
146struct kvm_vcpu_stat {
147 u64 wait_exits;
148 u64 cache_exits;
149 u64 signal_exits;
150 u64 int_exits;
151 u64 cop_unusable_exits;
152 u64 tlbmod_exits;
153 u64 tlbmiss_ld_exits;
154 u64 tlbmiss_st_exits;
155 u64 addrerr_st_exits;
156 u64 addrerr_ld_exits;
157 u64 syscall_exits;
158 u64 resvd_inst_exits;
159 u64 break_inst_exits;
160 u64 trap_inst_exits;
161 u64 msa_fpe_exits;
162 u64 fpe_exits;
163 u64 msa_disabled_exits;
164 u64 flush_dcache_exits;
165#ifdef CONFIG_KVM_MIPS_VZ
166 u64 vz_gpsi_exits;
167 u64 vz_gsfc_exits;
168 u64 vz_hc_exits;
169 u64 vz_grr_exits;
170 u64 vz_gva_exits;
171 u64 vz_ghfc_exits;
172 u64 vz_gpa_exits;
173 u64 vz_resvd_exits;
174#endif
175 u64 halt_successful_poll;
176 u64 halt_attempted_poll;
177 u64 halt_poll_invalid;
178 u64 halt_wakeup;
179};
180
181struct kvm_arch_memory_slot {
182};
183
184struct kvm_arch {
185 /* Guest physical mm */
186 struct mm_struct gpa_mm;
187 /* Mask of CPUs needing GPA ASID flush */
188 cpumask_t asid_flush_mask;
189};
190
191#define N_MIPS_COPROC_REGS 32
192#define N_MIPS_COPROC_SEL 8
193
194struct mips_coproc {
195 unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
196#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
197 unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
198#endif
199};
200
201/*
202 * Coprocessor 0 register names
203 */
204#define MIPS_CP0_TLB_INDEX 0
205#define MIPS_CP0_TLB_RANDOM 1
206#define MIPS_CP0_TLB_LOW 2
207#define MIPS_CP0_TLB_LO0 2
208#define MIPS_CP0_TLB_LO1 3
209#define MIPS_CP0_TLB_CONTEXT 4
210#define MIPS_CP0_TLB_PG_MASK 5
211#define MIPS_CP0_TLB_WIRED 6
212#define MIPS_CP0_HWRENA 7
213#define MIPS_CP0_BAD_VADDR 8
214#define MIPS_CP0_COUNT 9
215#define MIPS_CP0_TLB_HI 10
216#define MIPS_CP0_COMPARE 11
217#define MIPS_CP0_STATUS 12
218#define MIPS_CP0_CAUSE 13
219#define MIPS_CP0_EXC_PC 14
220#define MIPS_CP0_PRID 15
221#define MIPS_CP0_CONFIG 16
222#define MIPS_CP0_LLADDR 17
223#define MIPS_CP0_WATCH_LO 18
224#define MIPS_CP0_WATCH_HI 19
225#define MIPS_CP0_TLB_XCONTEXT 20
226#define MIPS_CP0_ECC 26
227#define MIPS_CP0_CACHE_ERR 27
228#define MIPS_CP0_TAG_LO 28
229#define MIPS_CP0_TAG_HI 29
230#define MIPS_CP0_ERROR_PC 30
231#define MIPS_CP0_DEBUG 23
232#define MIPS_CP0_DEPC 24
233#define MIPS_CP0_PERFCNT 25
234#define MIPS_CP0_ERRCTL 26
235#define MIPS_CP0_DATA_LO 28
236#define MIPS_CP0_DATA_HI 29
237#define MIPS_CP0_DESAVE 31
238
239#define MIPS_CP0_CONFIG_SEL 0
240#define MIPS_CP0_CONFIG1_SEL 1
241#define MIPS_CP0_CONFIG2_SEL 2
242#define MIPS_CP0_CONFIG3_SEL 3
243#define MIPS_CP0_CONFIG4_SEL 4
244#define MIPS_CP0_CONFIG5_SEL 5
245
246#define MIPS_CP0_GUESTCTL2 10
247#define MIPS_CP0_GUESTCTL2_SEL 5
248#define MIPS_CP0_GTOFFSET 12
249#define MIPS_CP0_GTOFFSET_SEL 7
250
251/* Resume Flags */
252#define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */
253#define RESUME_FLAG_HOST (1<<1) /* Resume host? */
254
255#define RESUME_GUEST 0
256#define RESUME_GUEST_DR RESUME_FLAG_DR
257#define RESUME_HOST RESUME_FLAG_HOST
258
259enum emulation_result {
260 EMULATE_DONE, /* no further processing */
261 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
262 EMULATE_FAIL, /* can't emulate this instruction */
263 EMULATE_WAIT, /* WAIT instruction */
264 EMULATE_PRIV_FAIL,
265 EMULATE_EXCEPT, /* A guest exception has been generated */
266 EMULATE_HYPERCALL, /* HYPCALL instruction */
267};
268
269#define mips3_paddr_to_tlbpfn(x) \
270 (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME)
271#define mips3_tlbpfn_to_paddr(x) \
272 ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT)
273
274#define MIPS3_PG_SHIFT 6
275#define MIPS3_PG_FRAME 0x3fffffc0
276
277#define VPN2_MASK 0xffffe000
278#define KVM_ENTRYHI_ASID MIPS_ENTRYHI_ASID
279#define TLB_IS_GLOBAL(x) ((x).tlb_lo[0] & (x).tlb_lo[1] & ENTRYLO_G)
280#define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK)
281#define TLB_ASID(x) ((x).tlb_hi & KVM_ENTRYHI_ASID)
282#define TLB_LO_IDX(x, va) (((va) >> PAGE_SHIFT) & 1)
283#define TLB_IS_VALID(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_V)
284#define TLB_IS_DIRTY(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_D)
285#define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \
286 ((y) & VPN2_MASK & ~(x).tlb_mask))
287#define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \
288 TLB_ASID(x) == ((y) & KVM_ENTRYHI_ASID))
289
290struct kvm_mips_tlb {
291 long tlb_mask;
292 long tlb_hi;
293 long tlb_lo[2];
294};
295
296#define KVM_NR_MEM_OBJS 4
297
298/*
299 * We don't want allocation failures within the mmu code, so we preallocate
300 * enough memory for a single page fault in a cache.
301 */
302struct kvm_mmu_memory_cache {
303 int nobjs;
304 void *objects[KVM_NR_MEM_OBJS];
305};
306
307#define KVM_MIPS_AUX_FPU 0x1
308#define KVM_MIPS_AUX_MSA 0x2
309
310#define KVM_MIPS_GUEST_TLB_SIZE 64
311struct kvm_vcpu_arch {
312 void *guest_ebase;
313 int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
314
315 /* Host registers preserved across guest mode execution */
316 unsigned long host_stack;
317 unsigned long host_gp;
318 unsigned long host_pgd;
319 unsigned long host_entryhi;
320
321 /* Host CP0 registers used when handling exits from guest */
322 unsigned long host_cp0_badvaddr;
323 unsigned long host_cp0_epc;
324 u32 host_cp0_cause;
325 u32 host_cp0_guestctl0;
326 u32 host_cp0_badinstr;
327 u32 host_cp0_badinstrp;
328
329 /* GPRS */
330 unsigned long gprs[32];
331 unsigned long hi;
332 unsigned long lo;
333 unsigned long pc;
334
335 /* FPU State */
336 struct mips_fpu_struct fpu;
337 /* Which auxiliary state is loaded (KVM_MIPS_AUX_*) */
338 unsigned int aux_inuse;
339
340 /* COP0 State */
341 struct mips_coproc *cop0;
342
343 /* Host KSEG0 address of the EI/DI offset */
344 void *kseg0_commpage;
345
346 /* Resume PC after MMIO completion */
347 unsigned long io_pc;
348 /* GPR used as IO source/target */
349 u32 io_gpr;
350
351 struct hrtimer comparecount_timer;
352 /* Count timer control KVM register */
353 u32 count_ctl;
354 /* Count bias from the raw time */
355 u32 count_bias;
356 /* Frequency of timer in Hz */
357 u32 count_hz;
358 /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */
359 s64 count_dyn_bias;
360 /* Resume time */
361 ktime_t count_resume;
362 /* Period of timer tick in ns */
363 u64 count_period;
364
365 /* Bitmask of exceptions that are pending */
366 unsigned long pending_exceptions;
367
368 /* Bitmask of pending exceptions to be cleared */
369 unsigned long pending_exceptions_clr;
370
371 /* S/W Based TLB for guest */
372 struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE];
373
374 /* Guest kernel/user [partial] mm */
375 struct mm_struct guest_kernel_mm, guest_user_mm;
376
377 /* Guest ASID of last user mode execution */
378 unsigned int last_user_gasid;
379
380 /* Cache some mmu pages needed inside spinlock regions */
381 struct kvm_mmu_memory_cache mmu_page_cache;
382
383#ifdef CONFIG_KVM_MIPS_VZ
384 /* vcpu's vzguestid is different on each host cpu in an smp system */
385 u32 vzguestid[NR_CPUS];
386
387 /* wired guest TLB entries */
388 struct kvm_mips_tlb *wired_tlb;
389 unsigned int wired_tlb_limit;
390 unsigned int wired_tlb_used;
391
392 /* emulated guest MAAR registers */
393 unsigned long maar[6];
394#endif
395
396 /* Last CPU the VCPU state was loaded on */
397 int last_sched_cpu;
398 /* Last CPU the VCPU actually executed guest code on */
399 int last_exec_cpu;
400
401 /* WAIT executed */
402 int wait;
403
404 u8 fpu_enabled;
405 u8 msa_enabled;
406};
407
408static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg,
409 unsigned long val)
410{
411 unsigned long temp;
412 do {
413 __asm__ __volatile__(
414 " .set "MIPS_ISA_ARCH_LEVEL" \n"
415 " " __LL "%0, %1 \n"
416 " or %0, %2 \n"
417 " " __SC "%0, %1 \n"
418 " .set mips0 \n"
419 : "=&r" (temp), "+m" (*reg)
420 : "r" (val));
421 } while (unlikely(!temp));
422}
423
424static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg,
425 unsigned long val)
426{
427 unsigned long temp;
428 do {
429 __asm__ __volatile__(
430 " .set "MIPS_ISA_ARCH_LEVEL" \n"
431 " " __LL "%0, %1 \n"
432 " and %0, %2 \n"
433 " " __SC "%0, %1 \n"
434 " .set mips0 \n"
435 : "=&r" (temp), "+m" (*reg)
436 : "r" (~val));
437 } while (unlikely(!temp));
438}
439
440static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg,
441 unsigned long change,
442 unsigned long val)
443{
444 unsigned long temp;
445 do {
446 __asm__ __volatile__(
447 " .set "MIPS_ISA_ARCH_LEVEL" \n"
448 " " __LL "%0, %1 \n"
449 " and %0, %2 \n"
450 " or %0, %3 \n"
451 " " __SC "%0, %1 \n"
452 " .set mips0 \n"
453 : "=&r" (temp), "+m" (*reg)
454 : "r" (~change), "r" (val & change));
455 } while (unlikely(!temp));
456}
457
458/* Guest register types, used in accessor build below */
459#define __KVMT32 u32
460#define __KVMTl unsigned long
461
462/*
463 * __BUILD_KVM_$ops_SAVED(): kvm_$op_sw_gc0_$reg()
464 * These operate on the saved guest C0 state in RAM.
465 */
466
467/* Generate saved context simple accessors */
468#define __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \
469static inline __KVMT##type kvm_read_sw_gc0_##name(struct mips_coproc *cop0) \
470{ \
471 return cop0->reg[(_reg)][(sel)]; \
472} \
473static inline void kvm_write_sw_gc0_##name(struct mips_coproc *cop0, \
474 __KVMT##type val) \
475{ \
476 cop0->reg[(_reg)][(sel)] = val; \
477}
478
479/* Generate saved context bitwise modifiers */
480#define __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \
481static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \
482 __KVMT##type val) \
483{ \
484 cop0->reg[(_reg)][(sel)] |= val; \
485} \
486static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \
487 __KVMT##type val) \
488{ \
489 cop0->reg[(_reg)][(sel)] &= ~val; \
490} \
491static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \
492 __KVMT##type mask, \
493 __KVMT##type val) \
494{ \
495 unsigned long _mask = mask; \
496 cop0->reg[(_reg)][(sel)] &= ~_mask; \
497 cop0->reg[(_reg)][(sel)] |= val & _mask; \
498}
499
500/* Generate saved context atomic bitwise modifiers */
501#define __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \
502static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \
503 __KVMT##type val) \
504{ \
505 _kvm_atomic_set_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \
506} \
507static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \
508 __KVMT##type val) \
509{ \
510 _kvm_atomic_clear_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \
511} \
512static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \
513 __KVMT##type mask, \
514 __KVMT##type val) \
515{ \
516 _kvm_atomic_change_c0_guest_reg(&cop0->reg[(_reg)][(sel)], mask, \
517 val); \
518}
519
520/*
521 * __BUILD_KVM_$ops_VZ(): kvm_$op_vz_gc0_$reg()
522 * These operate on the VZ guest C0 context in hardware.
523 */
524
525/* Generate VZ guest context simple accessors */
526#define __BUILD_KVM_RW_VZ(name, type, _reg, sel) \
527static inline __KVMT##type kvm_read_vz_gc0_##name(struct mips_coproc *cop0) \
528{ \
529 return read_gc0_##name(); \
530} \
531static inline void kvm_write_vz_gc0_##name(struct mips_coproc *cop0, \
532 __KVMT##type val) \
533{ \
534 write_gc0_##name(val); \
535}
536
537/* Generate VZ guest context bitwise modifiers */
538#define __BUILD_KVM_SET_VZ(name, type, _reg, sel) \
539static inline void kvm_set_vz_gc0_##name(struct mips_coproc *cop0, \
540 __KVMT##type val) \
541{ \
542 set_gc0_##name(val); \
543} \
544static inline void kvm_clear_vz_gc0_##name(struct mips_coproc *cop0, \
545 __KVMT##type val) \
546{ \
547 clear_gc0_##name(val); \
548} \
549static inline void kvm_change_vz_gc0_##name(struct mips_coproc *cop0, \
550 __KVMT##type mask, \
551 __KVMT##type val) \
552{ \
553 change_gc0_##name(mask, val); \
554}
555
556/* Generate VZ guest context save/restore to/from saved context */
557#define __BUILD_KVM_SAVE_VZ(name, _reg, sel) \
558static inline void kvm_restore_gc0_##name(struct mips_coproc *cop0) \
559{ \
560 write_gc0_##name(cop0->reg[(_reg)][(sel)]); \
561} \
562static inline void kvm_save_gc0_##name(struct mips_coproc *cop0) \
563{ \
564 cop0->reg[(_reg)][(sel)] = read_gc0_##name(); \
565}
566
567/*
568 * __BUILD_KVM_$ops_WRAP(): kvm_$op_$name1() -> kvm_$op_$name2()
569 * These wrap a set of operations to provide them with a different name.
570 */
571
572/* Generate simple accessor wrapper */
573#define __BUILD_KVM_RW_WRAP(name1, name2, type) \
574static inline __KVMT##type kvm_read_##name1(struct mips_coproc *cop0) \
575{ \
576 return kvm_read_##name2(cop0); \
577} \
578static inline void kvm_write_##name1(struct mips_coproc *cop0, \
579 __KVMT##type val) \
580{ \
581 kvm_write_##name2(cop0, val); \
582}
583
584/* Generate bitwise modifier wrapper */
585#define __BUILD_KVM_SET_WRAP(name1, name2, type) \
586static inline void kvm_set_##name1(struct mips_coproc *cop0, \
587 __KVMT##type val) \
588{ \
589 kvm_set_##name2(cop0, val); \
590} \
591static inline void kvm_clear_##name1(struct mips_coproc *cop0, \
592 __KVMT##type val) \
593{ \
594 kvm_clear_##name2(cop0, val); \
595} \
596static inline void kvm_change_##name1(struct mips_coproc *cop0, \
597 __KVMT##type mask, \
598 __KVMT##type val) \
599{ \
600 kvm_change_##name2(cop0, mask, val); \
601}
602
603/*
604 * __BUILD_KVM_$ops_SW(): kvm_$op_c0_guest_$reg() -> kvm_$op_sw_gc0_$reg()
605 * These generate accessors operating on the saved context in RAM, and wrap them
606 * with the common guest C0 accessors (for use by common emulation code).
607 */
608
609#define __BUILD_KVM_RW_SW(name, type, _reg, sel) \
610 __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \
611 __BUILD_KVM_RW_WRAP(c0_guest_##name, sw_gc0_##name, type)
612
613#define __BUILD_KVM_SET_SW(name, type, _reg, sel) \
614 __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \
615 __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type)
616
617#define __BUILD_KVM_ATOMIC_SW(name, type, _reg, sel) \
618 __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \
619 __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type)
620
621#ifndef CONFIG_KVM_MIPS_VZ
622
623/*
624 * T&E (trap & emulate software based virtualisation)
625 * We generate the common accessors operating exclusively on the saved context
626 * in RAM.
627 */
628
629#define __BUILD_KVM_RW_HW __BUILD_KVM_RW_SW
630#define __BUILD_KVM_SET_HW __BUILD_KVM_SET_SW
631#define __BUILD_KVM_ATOMIC_HW __BUILD_KVM_ATOMIC_SW
632
633#else
634
635/*
636 * VZ (hardware assisted virtualisation)
637 * These macros use the active guest state in VZ mode (hardware registers),
638 */
639
640/*
641 * __BUILD_KVM_$ops_HW(): kvm_$op_c0_guest_$reg() -> kvm_$op_vz_gc0_$reg()
642 * These generate accessors operating on the VZ guest context in hardware, and
643 * wrap them with the common guest C0 accessors (for use by common emulation
644 * code).
645 *
646 * Accessors operating on the saved context in RAM are also generated to allow
647 * convenient explicit saving and restoring of the state.
648 */
649
650#define __BUILD_KVM_RW_HW(name, type, _reg, sel) \
651 __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \
652 __BUILD_KVM_RW_VZ(name, type, _reg, sel) \
653 __BUILD_KVM_RW_WRAP(c0_guest_##name, vz_gc0_##name, type) \
654 __BUILD_KVM_SAVE_VZ(name, _reg, sel)
655
656#define __BUILD_KVM_SET_HW(name, type, _reg, sel) \
657 __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \
658 __BUILD_KVM_SET_VZ(name, type, _reg, sel) \
659 __BUILD_KVM_SET_WRAP(c0_guest_##name, vz_gc0_##name, type)
660
661/*
662 * We can't do atomic modifications of COP0 state if hardware can modify it.
663 * Races must be handled explicitly.
664 */
665#define __BUILD_KVM_ATOMIC_HW __BUILD_KVM_SET_HW
666
667#endif
668
669/*
670 * Define accessors for CP0 registers that are accessible to the guest. These
671 * are primarily used by common emulation code, which may need to access the
672 * registers differently depending on the implementation.
673 *
674 * fns_hw/sw name type reg num select
675 */
676__BUILD_KVM_RW_HW(index, 32, MIPS_CP0_TLB_INDEX, 0)
677__BUILD_KVM_RW_HW(entrylo0, l, MIPS_CP0_TLB_LO0, 0)
678__BUILD_KVM_RW_HW(entrylo1, l, MIPS_CP0_TLB_LO1, 0)
679__BUILD_KVM_RW_HW(context, l, MIPS_CP0_TLB_CONTEXT, 0)
680__BUILD_KVM_RW_HW(contextconfig, 32, MIPS_CP0_TLB_CONTEXT, 1)
681__BUILD_KVM_RW_HW(userlocal, l, MIPS_CP0_TLB_CONTEXT, 2)
682__BUILD_KVM_RW_HW(xcontextconfig, l, MIPS_CP0_TLB_CONTEXT, 3)
683__BUILD_KVM_RW_HW(pagemask, l, MIPS_CP0_TLB_PG_MASK, 0)
684__BUILD_KVM_RW_HW(pagegrain, 32, MIPS_CP0_TLB_PG_MASK, 1)
685__BUILD_KVM_RW_HW(segctl0, l, MIPS_CP0_TLB_PG_MASK, 2)
686__BUILD_KVM_RW_HW(segctl1, l, MIPS_CP0_TLB_PG_MASK, 3)
687__BUILD_KVM_RW_HW(segctl2, l, MIPS_CP0_TLB_PG_MASK, 4)
688__BUILD_KVM_RW_HW(pwbase, l, MIPS_CP0_TLB_PG_MASK, 5)
689__BUILD_KVM_RW_HW(pwfield, l, MIPS_CP0_TLB_PG_MASK, 6)
690__BUILD_KVM_RW_HW(pwsize, l, MIPS_CP0_TLB_PG_MASK, 7)
691__BUILD_KVM_RW_HW(wired, 32, MIPS_CP0_TLB_WIRED, 0)
692__BUILD_KVM_RW_HW(pwctl, 32, MIPS_CP0_TLB_WIRED, 6)
693__BUILD_KVM_RW_HW(hwrena, 32, MIPS_CP0_HWRENA, 0)
694__BUILD_KVM_RW_HW(badvaddr, l, MIPS_CP0_BAD_VADDR, 0)
695__BUILD_KVM_RW_HW(badinstr, 32, MIPS_CP0_BAD_VADDR, 1)
696__BUILD_KVM_RW_HW(badinstrp, 32, MIPS_CP0_BAD_VADDR, 2)
697__BUILD_KVM_RW_SW(count, 32, MIPS_CP0_COUNT, 0)
698__BUILD_KVM_RW_HW(entryhi, l, MIPS_CP0_TLB_HI, 0)
699__BUILD_KVM_RW_HW(compare, 32, MIPS_CP0_COMPARE, 0)
700__BUILD_KVM_RW_HW(status, 32, MIPS_CP0_STATUS, 0)
701__BUILD_KVM_RW_HW(intctl, 32, MIPS_CP0_STATUS, 1)
702__BUILD_KVM_RW_HW(cause, 32, MIPS_CP0_CAUSE, 0)
703__BUILD_KVM_RW_HW(epc, l, MIPS_CP0_EXC_PC, 0)
704__BUILD_KVM_RW_SW(prid, 32, MIPS_CP0_PRID, 0)
705__BUILD_KVM_RW_HW(ebase, l, MIPS_CP0_PRID, 1)
706__BUILD_KVM_RW_HW(config, 32, MIPS_CP0_CONFIG, 0)
707__BUILD_KVM_RW_HW(config1, 32, MIPS_CP0_CONFIG, 1)
708__BUILD_KVM_RW_HW(config2, 32, MIPS_CP0_CONFIG, 2)
709__BUILD_KVM_RW_HW(config3, 32, MIPS_CP0_CONFIG, 3)
710__BUILD_KVM_RW_HW(config4, 32, MIPS_CP0_CONFIG, 4)
711__BUILD_KVM_RW_HW(config5, 32, MIPS_CP0_CONFIG, 5)
712__BUILD_KVM_RW_HW(config6, 32, MIPS_CP0_CONFIG, 6)
713__BUILD_KVM_RW_HW(config7, 32, MIPS_CP0_CONFIG, 7)
714__BUILD_KVM_RW_SW(maari, l, MIPS_CP0_LLADDR, 2)
715__BUILD_KVM_RW_HW(xcontext, l, MIPS_CP0_TLB_XCONTEXT, 0)
716__BUILD_KVM_RW_HW(errorepc, l, MIPS_CP0_ERROR_PC, 0)
717__BUILD_KVM_RW_HW(kscratch1, l, MIPS_CP0_DESAVE, 2)
718__BUILD_KVM_RW_HW(kscratch2, l, MIPS_CP0_DESAVE, 3)
719__BUILD_KVM_RW_HW(kscratch3, l, MIPS_CP0_DESAVE, 4)
720__BUILD_KVM_RW_HW(kscratch4, l, MIPS_CP0_DESAVE, 5)
721__BUILD_KVM_RW_HW(kscratch5, l, MIPS_CP0_DESAVE, 6)
722__BUILD_KVM_RW_HW(kscratch6, l, MIPS_CP0_DESAVE, 7)
723
724/* Bitwise operations (on HW state) */
725__BUILD_KVM_SET_HW(status, 32, MIPS_CP0_STATUS, 0)
726/* Cause can be modified asynchronously from hardirq hrtimer callback */
727__BUILD_KVM_ATOMIC_HW(cause, 32, MIPS_CP0_CAUSE, 0)
728__BUILD_KVM_SET_HW(ebase, l, MIPS_CP0_PRID, 1)
729
730/* Bitwise operations (on saved state) */
731__BUILD_KVM_SET_SAVED(config, 32, MIPS_CP0_CONFIG, 0)
732__BUILD_KVM_SET_SAVED(config1, 32, MIPS_CP0_CONFIG, 1)
733__BUILD_KVM_SET_SAVED(config2, 32, MIPS_CP0_CONFIG, 2)
734__BUILD_KVM_SET_SAVED(config3, 32, MIPS_CP0_CONFIG, 3)
735__BUILD_KVM_SET_SAVED(config4, 32, MIPS_CP0_CONFIG, 4)
736__BUILD_KVM_SET_SAVED(config5, 32, MIPS_CP0_CONFIG, 5)
737
738/* Helpers */
739
740static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu)
741{
742 return (!__builtin_constant_p(raw_cpu_has_fpu) || raw_cpu_has_fpu) &&
743 vcpu->fpu_enabled;
744}
745
746static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu)
747{
748 return kvm_mips_guest_can_have_fpu(vcpu) &&
749 kvm_read_c0_guest_config1(vcpu->cop0) & MIPS_CONF1_FP;
750}
751
752static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu)
753{
754 return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) &&
755 vcpu->msa_enabled;
756}
757
758static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu)
759{
760 return kvm_mips_guest_can_have_msa(vcpu) &&
761 kvm_read_c0_guest_config3(vcpu->cop0) & MIPS_CONF3_MSA;
762}
763
764struct kvm_mips_callbacks {
765 int (*handle_cop_unusable)(struct kvm_vcpu *vcpu);
766 int (*handle_tlb_mod)(struct kvm_vcpu *vcpu);
767 int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu);
768 int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu);
769 int (*handle_addr_err_st)(struct kvm_vcpu *vcpu);
770 int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu);
771 int (*handle_syscall)(struct kvm_vcpu *vcpu);
772 int (*handle_res_inst)(struct kvm_vcpu *vcpu);
773 int (*handle_break)(struct kvm_vcpu *vcpu);
774 int (*handle_trap)(struct kvm_vcpu *vcpu);
775 int (*handle_msa_fpe)(struct kvm_vcpu *vcpu);
776 int (*handle_fpe)(struct kvm_vcpu *vcpu);
777 int (*handle_msa_disabled)(struct kvm_vcpu *vcpu);
778 int (*handle_guest_exit)(struct kvm_vcpu *vcpu);
779 int (*hardware_enable)(void);
780 void (*hardware_disable)(void);
781 int (*check_extension)(struct kvm *kvm, long ext);
782 int (*vcpu_init)(struct kvm_vcpu *vcpu);
783 void (*vcpu_uninit)(struct kvm_vcpu *vcpu);
784 int (*vcpu_setup)(struct kvm_vcpu *vcpu);
785 void (*flush_shadow_all)(struct kvm *kvm);
786 /*
787 * Must take care of flushing any cached GPA PTEs (e.g. guest entries in
788 * VZ root TLB, or T&E GVA page tables and corresponding root TLB
789 * mappings).
790 */
791 void (*flush_shadow_memslot)(struct kvm *kvm,
792 const struct kvm_memory_slot *slot);
793 gpa_t (*gva_to_gpa)(gva_t gva);
794 void (*queue_timer_int)(struct kvm_vcpu *vcpu);
795 void (*dequeue_timer_int)(struct kvm_vcpu *vcpu);
796 void (*queue_io_int)(struct kvm_vcpu *vcpu,
797 struct kvm_mips_interrupt *irq);
798 void (*dequeue_io_int)(struct kvm_vcpu *vcpu,
799 struct kvm_mips_interrupt *irq);
800 int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority,
801 u32 cause);
802 int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority,
803 u32 cause);
804 unsigned long (*num_regs)(struct kvm_vcpu *vcpu);
805 int (*copy_reg_indices)(struct kvm_vcpu *vcpu, u64 __user *indices);
806 int (*get_one_reg)(struct kvm_vcpu *vcpu,
807 const struct kvm_one_reg *reg, s64 *v);
808 int (*set_one_reg)(struct kvm_vcpu *vcpu,
809 const struct kvm_one_reg *reg, s64 v);
810 int (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
811 int (*vcpu_put)(struct kvm_vcpu *vcpu, int cpu);
812 int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
813 void (*vcpu_reenter)(struct kvm_run *run, struct kvm_vcpu *vcpu);
814};
815extern struct kvm_mips_callbacks *kvm_mips_callbacks;
816int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
817
818/* Debug: dump vcpu state */
819int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
820
821extern int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu);
822
823/* Building of entry/exception code */
824int kvm_mips_entry_setup(void);
825void *kvm_mips_build_vcpu_run(void *addr);
826void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler);
827void *kvm_mips_build_exception(void *addr, void *handler);
828void *kvm_mips_build_exit(void *addr);
829
830/* FPU/MSA context management */
831void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu);
832void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu);
833void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu);
834void __kvm_save_msa(struct kvm_vcpu_arch *vcpu);
835void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu);
836void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu);
837void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu);
838void kvm_own_fpu(struct kvm_vcpu *vcpu);
839void kvm_own_msa(struct kvm_vcpu *vcpu);
840void kvm_drop_fpu(struct kvm_vcpu *vcpu);
841void kvm_lose_fpu(struct kvm_vcpu *vcpu);
842
843/* TLB handling */
844u32 kvm_get_kernel_asid(struct kvm_vcpu *vcpu);
845
846u32 kvm_get_user_asid(struct kvm_vcpu *vcpu);
847
848u32 kvm_get_commpage_asid (struct kvm_vcpu *vcpu);
849
850#ifdef CONFIG_KVM_MIPS_VZ
851int kvm_mips_handle_vz_root_tlb_fault(unsigned long badvaddr,
852 struct kvm_vcpu *vcpu, bool write_fault);
853#endif
854extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr,
855 struct kvm_vcpu *vcpu,
856 bool write_fault);
857
858extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
859 struct kvm_vcpu *vcpu);
860
861extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
862 struct kvm_mips_tlb *tlb,
863 unsigned long gva,
864 bool write_fault);
865
866extern enum emulation_result kvm_mips_handle_tlbmiss(u32 cause,
867 u32 *opc,
868 struct kvm_run *run,
869 struct kvm_vcpu *vcpu,
870 bool write_fault);
871
872extern void kvm_mips_dump_host_tlbs(void);
873extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu);
874extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi,
875 bool user, bool kernel);
876
877extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu,
878 unsigned long entryhi);
879
880#ifdef CONFIG_KVM_MIPS_VZ
881int kvm_vz_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi);
882int kvm_vz_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long gva,
883 unsigned long *gpa);
884void kvm_vz_local_flush_roottlb_all_guests(void);
885void kvm_vz_local_flush_guesttlb_all(void);
886void kvm_vz_save_guesttlb(struct kvm_mips_tlb *buf, unsigned int index,
887 unsigned int count);
888void kvm_vz_load_guesttlb(const struct kvm_mips_tlb *buf, unsigned int index,
889 unsigned int count);
890#endif
891
892void kvm_mips_suspend_mm(int cpu);
893void kvm_mips_resume_mm(int cpu);
894
895/* MMU handling */
896
897/**
898 * enum kvm_mips_flush - Types of MMU flushes.
899 * @KMF_USER: Flush guest user virtual memory mappings.
900 * Guest USeg only.
901 * @KMF_KERN: Flush guest kernel virtual memory mappings.
902 * Guest USeg and KSeg2/3.
903 * @KMF_GPA: Flush guest physical memory mappings.
904 * Also includes KSeg0 if KMF_KERN is set.
905 */
906enum kvm_mips_flush {
907 KMF_USER = 0x0,
908 KMF_KERN = 0x1,
909 KMF_GPA = 0x2,
910};
911void kvm_mips_flush_gva_pt(pgd_t *pgd, enum kvm_mips_flush flags);
912bool kvm_mips_flush_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn);
913int kvm_mips_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn);
914pgd_t *kvm_pgd_alloc(void);
915void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu);
916void kvm_trap_emul_invalidate_gva(struct kvm_vcpu *vcpu, unsigned long addr,
917 bool user);
918void kvm_trap_emul_gva_lockless_begin(struct kvm_vcpu *vcpu);
919void kvm_trap_emul_gva_lockless_end(struct kvm_vcpu *vcpu);
920
921enum kvm_mips_fault_result {
922 KVM_MIPS_MAPPED = 0,
923 KVM_MIPS_GVA,
924 KVM_MIPS_GPA,
925 KVM_MIPS_TLB,
926 KVM_MIPS_TLBINV,
927 KVM_MIPS_TLBMOD,
928};
929enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu,
930 unsigned long gva,
931 bool write);
932
933#define KVM_ARCH_WANT_MMU_NOTIFIER
934int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
935int kvm_unmap_hva_range(struct kvm *kvm,
936 unsigned long start, unsigned long end);
937void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
938int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
939int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
940
941/* Emulation */
942int kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu, u32 *out);
943enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause);
944int kvm_get_badinstr(u32 *opc, struct kvm_vcpu *vcpu, u32 *out);
945int kvm_get_badinstrp(u32 *opc, struct kvm_vcpu *vcpu, u32 *out);
946
947/**
948 * kvm_is_ifetch_fault() - Find whether a TLBL exception is due to ifetch fault.
949 * @vcpu: Virtual CPU.
950 *
951 * Returns: Whether the TLBL exception was likely due to an instruction
952 * fetch fault rather than a data load fault.
953 */
954static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *vcpu)
955{
956 unsigned long badvaddr = vcpu->host_cp0_badvaddr;
957 unsigned long epc = msk_isa16_mode(vcpu->pc);
958 u32 cause = vcpu->host_cp0_cause;
959
960 if (epc == badvaddr)
961 return true;
962
963 /*
964 * Branches may be 32-bit or 16-bit instructions.
965 * This isn't exact, but we don't really support MIPS16 or microMIPS yet
966 * in KVM anyway.
967 */
968 if ((cause & CAUSEF_BD) && badvaddr - epc <= 4)
969 return true;
970
971 return false;
972}
973
974extern enum emulation_result kvm_mips_emulate_inst(u32 cause,
975 u32 *opc,
976 struct kvm_run *run,
977 struct kvm_vcpu *vcpu);
978
979long kvm_mips_guest_exception_base(struct kvm_vcpu *vcpu);
980
981extern enum emulation_result kvm_mips_emulate_syscall(u32 cause,
982 u32 *opc,
983 struct kvm_run *run,
984 struct kvm_vcpu *vcpu);
985
986extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause,
987 u32 *opc,
988 struct kvm_run *run,
989 struct kvm_vcpu *vcpu);
990
991extern enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause,
992 u32 *opc,
993 struct kvm_run *run,
994 struct kvm_vcpu *vcpu);
995
996extern enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause,
997 u32 *opc,
998 struct kvm_run *run,
999 struct kvm_vcpu *vcpu);
1000
1001extern enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause,
1002 u32 *opc,
1003 struct kvm_run *run,
1004 struct kvm_vcpu *vcpu);
1005
1006extern enum emulation_result kvm_mips_emulate_tlbmod(u32 cause,
1007 u32 *opc,
1008 struct kvm_run *run,
1009 struct kvm_vcpu *vcpu);
1010
1011extern enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause,
1012 u32 *opc,
1013 struct kvm_run *run,
1014 struct kvm_vcpu *vcpu);
1015
1016extern enum emulation_result kvm_mips_handle_ri(u32 cause,
1017 u32 *opc,
1018 struct kvm_run *run,
1019 struct kvm_vcpu *vcpu);
1020
1021extern enum emulation_result kvm_mips_emulate_ri_exc(u32 cause,
1022 u32 *opc,
1023 struct kvm_run *run,
1024 struct kvm_vcpu *vcpu);
1025
1026extern enum emulation_result kvm_mips_emulate_bp_exc(u32 cause,
1027 u32 *opc,
1028 struct kvm_run *run,
1029 struct kvm_vcpu *vcpu);
1030
1031extern enum emulation_result kvm_mips_emulate_trap_exc(u32 cause,
1032 u32 *opc,
1033 struct kvm_run *run,
1034 struct kvm_vcpu *vcpu);
1035
1036extern enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause,
1037 u32 *opc,
1038 struct kvm_run *run,
1039 struct kvm_vcpu *vcpu);
1040
1041extern enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause,
1042 u32 *opc,
1043 struct kvm_run *run,
1044 struct kvm_vcpu *vcpu);
1045
1046extern enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause,
1047 u32 *opc,
1048 struct kvm_run *run,
1049 struct kvm_vcpu *vcpu);
1050
1051extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
1052 struct kvm_run *run);
1053
1054u32 kvm_mips_read_count(struct kvm_vcpu *vcpu);
1055void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count);
1056void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack);
1057void kvm_mips_init_count(struct kvm_vcpu *vcpu, unsigned long count_hz);
1058int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl);
1059int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume);
1060int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz);
1061void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu);
1062void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu);
1063enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu);
1064
1065/* fairly internal functions requiring some care to use */
1066int kvm_mips_count_disabled(struct kvm_vcpu *vcpu);
1067ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, u32 *count);
1068int kvm_mips_restore_hrtimer(struct kvm_vcpu *vcpu, ktime_t before,
1069 u32 count, int min_drift);
1070
1071#ifdef CONFIG_KVM_MIPS_VZ
1072void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu);
1073void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu);
1074#else
1075static inline void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu) {}
1076static inline void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu) {}
1077#endif
1078
1079enum emulation_result kvm_mips_check_privilege(u32 cause,
1080 u32 *opc,
1081 struct kvm_run *run,
1082 struct kvm_vcpu *vcpu);
1083
1084enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst,
1085 u32 *opc,
1086 u32 cause,
1087 struct kvm_run *run,
1088 struct kvm_vcpu *vcpu);
1089enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst,
1090 u32 *opc,
1091 u32 cause,
1092 struct kvm_run *run,
1093 struct kvm_vcpu *vcpu);
1094enum emulation_result kvm_mips_emulate_store(union mips_instruction inst,
1095 u32 cause,
1096 struct kvm_run *run,
1097 struct kvm_vcpu *vcpu);
1098enum emulation_result kvm_mips_emulate_load(union mips_instruction inst,
1099 u32 cause,
1100 struct kvm_run *run,
1101 struct kvm_vcpu *vcpu);
1102
1103/* COP0 */
1104enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu);
1105
1106unsigned int kvm_mips_config1_wrmask(struct kvm_vcpu *vcpu);
1107unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu);
1108unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu);
1109unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu);
1110
1111/* Hypercalls (hypcall.c) */
1112
1113enum emulation_result kvm_mips_emul_hypcall(struct kvm_vcpu *vcpu,
1114 union mips_instruction inst);
1115int kvm_mips_handle_hypcall(struct kvm_vcpu *vcpu);
1116
1117/* Dynamic binary translation */
1118extern int kvm_mips_trans_cache_index(union mips_instruction inst,
1119 u32 *opc, struct kvm_vcpu *vcpu);
1120extern int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc,
1121 struct kvm_vcpu *vcpu);
1122extern int kvm_mips_trans_mfc0(union mips_instruction inst, u32 *opc,
1123 struct kvm_vcpu *vcpu);
1124extern int kvm_mips_trans_mtc0(union mips_instruction inst, u32 *opc,
1125 struct kvm_vcpu *vcpu);
1126
1127/* Misc */
1128extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu);
1129extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm);
1130
1131static inline void kvm_arch_hardware_unsetup(void) {}
1132static inline void kvm_arch_sync_events(struct kvm *kvm) {}
1133static inline void kvm_arch_free_memslot(struct kvm *kvm,
1134 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
1135static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
1136static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
1137static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
1138static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
1139static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
1140
1141#endif /* __MIPS_KVM_HOST_H__ */