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
6 * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
7 * Authors: Sanjay Lal <sanjayl@kymasys.com>
10 #ifndef __MIPS_KVM_HOST_H__
11 #define __MIPS_KVM_HOST_H__
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>
23 #include <asm/mipsregs.h>
25 /* MIPS KVM register ids */
26 #define MIPS_CP0_32(_R, _S) \
27 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S)))
29 #define MIPS_CP0_64(_R, _S) \
30 (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S)))
32 #define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0)
33 #define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0)
34 #define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0)
35 #define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0)
36 #define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2)
37 #define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0)
38 #define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1)
39 #define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0)
40 #define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0)
41 #define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0)
42 #define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0)
43 #define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0)
44 #define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0)
45 #define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0)
46 #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0)
47 #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0)
48 #define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0)
49 #define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1)
50 #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0)
51 #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1)
52 #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2)
53 #define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3)
54 #define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4)
55 #define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5)
56 #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7)
57 #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0)
58 #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0)
59 #define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2)
60 #define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3)
61 #define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4)
62 #define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5)
63 #define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6)
64 #define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7)
67 #define KVM_MAX_VCPUS 1
68 #define KVM_USER_MEM_SLOTS 8
69 /* memory slots that does not exposed to userspace */
70 #define KVM_PRIVATE_MEM_SLOTS 0
72 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
73 #define KVM_HALT_POLL_NS_DEFAULT 500000
78 * Special address that contains the comm page, used for reducing # of traps
79 * This needs to be within 32Kb of 0x0 (so the zero register can be used), but
80 * preferably not at 0x0 so that most kernel NULL pointer dereferences can be
83 #define KVM_GUEST_COMMPAGE_ADDR ((PAGE_SIZE > 0x8000) ? 0 : \
86 #define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \
87 ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0))
89 #define KVM_GUEST_KUSEG 0x00000000UL
90 #define KVM_GUEST_KSEG0 0x40000000UL
91 #define KVM_GUEST_KSEG23 0x60000000UL
92 #define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0xe0000000)
93 #define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
95 #define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
96 #define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
97 #define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
100 * Map an address to a certain kernel segment
102 #define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
103 #define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
104 #define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
106 #define KVM_INVALID_PAGE 0xdeadbeef
107 #define KVM_INVALID_INST 0xdeadbeef
108 #define KVM_INVALID_ADDR 0xdeadbeef
111 * EVA has overlapping user & kernel address spaces, so user VAs may be >
112 * PAGE_OFFSET. For this reason we can't use the default KVM_HVA_ERR_BAD of
116 #define KVM_HVA_ERR_BAD (-1UL)
117 #define KVM_HVA_ERR_RO_BAD (-2UL)
119 static inline bool kvm_is_error_hva(unsigned long addr)
121 return IS_ERR_VALUE(addr);
124 extern atomic_t kvm_mips_instance;
127 ulong remote_tlb_flush;
130 struct kvm_vcpu_stat {
135 u64 cop_unusable_exits;
137 u64 tlbmiss_ld_exits;
138 u64 tlbmiss_st_exits;
139 u64 addrerr_st_exits;
140 u64 addrerr_ld_exits;
142 u64 resvd_inst_exits;
143 u64 break_inst_exits;
147 u64 msa_disabled_exits;
148 u64 flush_dcache_exits;
149 u64 halt_successful_poll;
150 u64 halt_attempted_poll;
151 u64 halt_poll_invalid;
155 struct kvm_arch_memory_slot {
159 /* Guest GVA->HPA page table */
160 unsigned long *guest_pmap;
161 unsigned long guest_pmap_npages;
163 /* Wired host TLB used for the commpage */
167 #define N_MIPS_COPROC_REGS 32
168 #define N_MIPS_COPROC_SEL 8
171 unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
172 #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
173 unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
178 * Coprocessor 0 register names
180 #define MIPS_CP0_TLB_INDEX 0
181 #define MIPS_CP0_TLB_RANDOM 1
182 #define MIPS_CP0_TLB_LOW 2
183 #define MIPS_CP0_TLB_LO0 2
184 #define MIPS_CP0_TLB_LO1 3
185 #define MIPS_CP0_TLB_CONTEXT 4
186 #define MIPS_CP0_TLB_PG_MASK 5
187 #define MIPS_CP0_TLB_WIRED 6
188 #define MIPS_CP0_HWRENA 7
189 #define MIPS_CP0_BAD_VADDR 8
190 #define MIPS_CP0_COUNT 9
191 #define MIPS_CP0_TLB_HI 10
192 #define MIPS_CP0_COMPARE 11
193 #define MIPS_CP0_STATUS 12
194 #define MIPS_CP0_CAUSE 13
195 #define MIPS_CP0_EXC_PC 14
196 #define MIPS_CP0_PRID 15
197 #define MIPS_CP0_CONFIG 16
198 #define MIPS_CP0_LLADDR 17
199 #define MIPS_CP0_WATCH_LO 18
200 #define MIPS_CP0_WATCH_HI 19
201 #define MIPS_CP0_TLB_XCONTEXT 20
202 #define MIPS_CP0_ECC 26
203 #define MIPS_CP0_CACHE_ERR 27
204 #define MIPS_CP0_TAG_LO 28
205 #define MIPS_CP0_TAG_HI 29
206 #define MIPS_CP0_ERROR_PC 30
207 #define MIPS_CP0_DEBUG 23
208 #define MIPS_CP0_DEPC 24
209 #define MIPS_CP0_PERFCNT 25
210 #define MIPS_CP0_ERRCTL 26
211 #define MIPS_CP0_DATA_LO 28
212 #define MIPS_CP0_DATA_HI 29
213 #define MIPS_CP0_DESAVE 31
215 #define MIPS_CP0_CONFIG_SEL 0
216 #define MIPS_CP0_CONFIG1_SEL 1
217 #define MIPS_CP0_CONFIG2_SEL 2
218 #define MIPS_CP0_CONFIG3_SEL 3
219 #define MIPS_CP0_CONFIG4_SEL 4
220 #define MIPS_CP0_CONFIG5_SEL 5
223 #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */
224 #define RESUME_FLAG_HOST (1<<1) /* Resume host? */
226 #define RESUME_GUEST 0
227 #define RESUME_GUEST_DR RESUME_FLAG_DR
228 #define RESUME_HOST RESUME_FLAG_HOST
230 enum emulation_result {
231 EMULATE_DONE, /* no further processing */
232 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
233 EMULATE_FAIL, /* can't emulate this instruction */
234 EMULATE_WAIT, /* WAIT instruction */
238 #define mips3_paddr_to_tlbpfn(x) \
239 (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME)
240 #define mips3_tlbpfn_to_paddr(x) \
241 ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT)
243 #define MIPS3_PG_SHIFT 6
244 #define MIPS3_PG_FRAME 0x3fffffc0
246 #if defined(CONFIG_64BIT)
247 #define VPN2_MASK GENMASK(cpu_vmbits - 1, 13)
249 #define VPN2_MASK 0xffffe000
251 #define KVM_ENTRYHI_ASID cpu_asid_mask(&boot_cpu_data)
252 #define TLB_IS_GLOBAL(x) ((x).tlb_lo[0] & (x).tlb_lo[1] & ENTRYLO_G)
253 #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK)
254 #define TLB_ASID(x) ((x).tlb_hi & KVM_ENTRYHI_ASID)
255 #define TLB_LO_IDX(x, va) (((va) >> PAGE_SHIFT) & 1)
256 #define TLB_IS_VALID(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_V)
257 #define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \
258 ((y) & VPN2_MASK & ~(x).tlb_mask))
259 #define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \
260 TLB_ASID(x) == ((y) & KVM_ENTRYHI_ASID))
262 struct kvm_mips_tlb {
268 #define KVM_MIPS_AUX_FPU 0x1
269 #define KVM_MIPS_AUX_MSA 0x2
271 #define KVM_MIPS_GUEST_TLB_SIZE 64
272 struct kvm_vcpu_arch {
274 int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
275 unsigned long host_stack;
276 unsigned long host_gp;
278 /* Host CP0 registers used when handling exits from guest */
279 unsigned long host_cp0_badvaddr;
280 unsigned long host_cp0_epc;
284 unsigned long gprs[32];
290 struct mips_fpu_struct fpu;
291 /* Which auxiliary state is loaded (KVM_MIPS_AUX_*) */
292 unsigned int aux_inuse;
295 struct mips_coproc *cop0;
297 /* Host KSEG0 address of the EI/DI offset */
298 void *kseg0_commpage;
300 /* Resume PC after MMIO completion */
302 /* GPR used as IO source/target */
305 struct hrtimer comparecount_timer;
306 /* Count timer control KVM register */
308 /* Count bias from the raw time */
310 /* Frequency of timer in Hz */
312 /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */
315 ktime_t count_resume;
316 /* Period of timer tick in ns */
319 /* Bitmask of exceptions that are pending */
320 unsigned long pending_exceptions;
322 /* Bitmask of pending exceptions to be cleared */
323 unsigned long pending_exceptions_clr;
325 /* Save/Restore the entryhi register when are are preempted/scheduled back in */
326 unsigned long preempt_entryhi;
328 /* S/W Based TLB for guest */
329 struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE];
331 /* Cached guest kernel/user ASIDs */
332 u32 guest_user_asid[NR_CPUS];
333 u32 guest_kernel_asid[NR_CPUS];
334 struct mm_struct guest_kernel_mm, guest_user_mm;
336 /* Guest ASID of last user mode execution */
337 unsigned int last_user_gasid;
350 #define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0])
351 #define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val)
352 #define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0])
353 #define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0])
354 #define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0])
355 #define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val))
356 #define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2])
357 #define kvm_write_c0_guest_userlocal(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2] = (val))
358 #define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0])
359 #define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val))
360 #define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0])
361 #define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val))
362 #define kvm_read_c0_guest_hwrena(cop0) (cop0->reg[MIPS_CP0_HWRENA][0])
363 #define kvm_write_c0_guest_hwrena(cop0, val) (cop0->reg[MIPS_CP0_HWRENA][0] = (val))
364 #define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0])
365 #define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val))
366 #define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0])
367 #define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val))
368 #define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0])
369 #define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val))
370 #define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0])
371 #define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val))
372 #define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0])
373 #define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val))
374 #define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1])
375 #define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val))
376 #define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0])
377 #define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val))
378 #define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0])
379 #define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val))
380 #define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0])
381 #define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val))
382 #define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1])
383 #define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val))
384 #define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0])
385 #define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1])
386 #define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2])
387 #define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3])
388 #define kvm_read_c0_guest_config4(cop0) (cop0->reg[MIPS_CP0_CONFIG][4])
389 #define kvm_read_c0_guest_config5(cop0) (cop0->reg[MIPS_CP0_CONFIG][5])
390 #define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7])
391 #define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val))
392 #define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val))
393 #define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val))
394 #define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val))
395 #define kvm_write_c0_guest_config4(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][4] = (val))
396 #define kvm_write_c0_guest_config5(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][5] = (val))
397 #define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val))
398 #define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0])
399 #define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val))
400 #define kvm_read_c0_guest_kscratch1(cop0) (cop0->reg[MIPS_CP0_DESAVE][2])
401 #define kvm_read_c0_guest_kscratch2(cop0) (cop0->reg[MIPS_CP0_DESAVE][3])
402 #define kvm_read_c0_guest_kscratch3(cop0) (cop0->reg[MIPS_CP0_DESAVE][4])
403 #define kvm_read_c0_guest_kscratch4(cop0) (cop0->reg[MIPS_CP0_DESAVE][5])
404 #define kvm_read_c0_guest_kscratch5(cop0) (cop0->reg[MIPS_CP0_DESAVE][6])
405 #define kvm_read_c0_guest_kscratch6(cop0) (cop0->reg[MIPS_CP0_DESAVE][7])
406 #define kvm_write_c0_guest_kscratch1(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][2] = (val))
407 #define kvm_write_c0_guest_kscratch2(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][3] = (val))
408 #define kvm_write_c0_guest_kscratch3(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][4] = (val))
409 #define kvm_write_c0_guest_kscratch4(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][5] = (val))
410 #define kvm_write_c0_guest_kscratch5(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][6] = (val))
411 #define kvm_write_c0_guest_kscratch6(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][7] = (val))
414 * Some of the guest registers may be modified asynchronously (e.g. from a
415 * hrtimer callback in hard irq context) and therefore need stronger atomicity
416 * guarantees than other registers.
419 static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg,
424 __asm__ __volatile__(
425 " .set "MIPS_ISA_ARCH_LEVEL" \n"
430 : "=&r" (temp), "+m" (*reg)
432 } while (unlikely(!temp));
435 static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg,
440 __asm__ __volatile__(
441 " .set "MIPS_ISA_ARCH_LEVEL" \n"
446 : "=&r" (temp), "+m" (*reg)
448 } while (unlikely(!temp));
451 static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg,
452 unsigned long change,
457 __asm__ __volatile__(
458 " .set "MIPS_ISA_ARCH_LEVEL" \n"
464 : "=&r" (temp), "+m" (*reg)
465 : "r" (~change), "r" (val & change));
466 } while (unlikely(!temp));
469 #define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val))
470 #define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val))
472 /* Cause can be modified asynchronously from hardirq hrtimer callback */
473 #define kvm_set_c0_guest_cause(cop0, val) \
474 _kvm_atomic_set_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val)
475 #define kvm_clear_c0_guest_cause(cop0, val) \
476 _kvm_atomic_clear_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val)
477 #define kvm_change_c0_guest_cause(cop0, change, val) \
478 _kvm_atomic_change_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], \
481 #define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val))
482 #define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val))
483 #define kvm_change_c0_guest_ebase(cop0, change, val) \
485 kvm_clear_c0_guest_ebase(cop0, change); \
486 kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \
491 static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu)
493 return (!__builtin_constant_p(raw_cpu_has_fpu) || raw_cpu_has_fpu) &&
497 static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu)
499 return kvm_mips_guest_can_have_fpu(vcpu) &&
500 kvm_read_c0_guest_config1(vcpu->cop0) & MIPS_CONF1_FP;
503 static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu)
505 return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) &&
509 static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu)
511 return kvm_mips_guest_can_have_msa(vcpu) &&
512 kvm_read_c0_guest_config3(vcpu->cop0) & MIPS_CONF3_MSA;
515 struct kvm_mips_callbacks {
516 int (*handle_cop_unusable)(struct kvm_vcpu *vcpu);
517 int (*handle_tlb_mod)(struct kvm_vcpu *vcpu);
518 int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu);
519 int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu);
520 int (*handle_addr_err_st)(struct kvm_vcpu *vcpu);
521 int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu);
522 int (*handle_syscall)(struct kvm_vcpu *vcpu);
523 int (*handle_res_inst)(struct kvm_vcpu *vcpu);
524 int (*handle_break)(struct kvm_vcpu *vcpu);
525 int (*handle_trap)(struct kvm_vcpu *vcpu);
526 int (*handle_msa_fpe)(struct kvm_vcpu *vcpu);
527 int (*handle_fpe)(struct kvm_vcpu *vcpu);
528 int (*handle_msa_disabled)(struct kvm_vcpu *vcpu);
529 int (*vm_init)(struct kvm *kvm);
530 int (*vcpu_init)(struct kvm_vcpu *vcpu);
531 int (*vcpu_setup)(struct kvm_vcpu *vcpu);
532 gpa_t (*gva_to_gpa)(gva_t gva);
533 void (*queue_timer_int)(struct kvm_vcpu *vcpu);
534 void (*dequeue_timer_int)(struct kvm_vcpu *vcpu);
535 void (*queue_io_int)(struct kvm_vcpu *vcpu,
536 struct kvm_mips_interrupt *irq);
537 void (*dequeue_io_int)(struct kvm_vcpu *vcpu,
538 struct kvm_mips_interrupt *irq);
539 int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority,
541 int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority,
543 unsigned long (*num_regs)(struct kvm_vcpu *vcpu);
544 int (*copy_reg_indices)(struct kvm_vcpu *vcpu, u64 __user *indices);
545 int (*get_one_reg)(struct kvm_vcpu *vcpu,
546 const struct kvm_one_reg *reg, s64 *v);
547 int (*set_one_reg)(struct kvm_vcpu *vcpu,
548 const struct kvm_one_reg *reg, s64 v);
549 int (*vcpu_get_regs)(struct kvm_vcpu *vcpu);
550 int (*vcpu_set_regs)(struct kvm_vcpu *vcpu);
552 extern struct kvm_mips_callbacks *kvm_mips_callbacks;
553 int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
555 /* Debug: dump vcpu state */
556 int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
558 extern int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu);
560 /* Building of entry/exception code */
561 int kvm_mips_entry_setup(void);
562 void *kvm_mips_build_vcpu_run(void *addr);
563 void *kvm_mips_build_exception(void *addr, void *handler);
564 void *kvm_mips_build_exit(void *addr);
566 /* FPU/MSA context management */
567 void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu);
568 void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu);
569 void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu);
570 void __kvm_save_msa(struct kvm_vcpu_arch *vcpu);
571 void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu);
572 void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu);
573 void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu);
574 void kvm_own_fpu(struct kvm_vcpu *vcpu);
575 void kvm_own_msa(struct kvm_vcpu *vcpu);
576 void kvm_drop_fpu(struct kvm_vcpu *vcpu);
577 void kvm_lose_fpu(struct kvm_vcpu *vcpu);
580 u32 kvm_get_kernel_asid(struct kvm_vcpu *vcpu);
582 u32 kvm_get_user_asid(struct kvm_vcpu *vcpu);
584 u32 kvm_get_commpage_asid (struct kvm_vcpu *vcpu);
586 extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr,
587 struct kvm_vcpu *vcpu);
589 extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
590 struct kvm_vcpu *vcpu);
592 extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
593 struct kvm_mips_tlb *tlb);
595 extern enum emulation_result kvm_mips_handle_tlbmiss(u32 cause,
598 struct kvm_vcpu *vcpu);
600 extern enum emulation_result kvm_mips_handle_tlbmod(u32 cause,
603 struct kvm_vcpu *vcpu);
605 extern void kvm_mips_dump_host_tlbs(void);
606 extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu);
607 extern int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
608 unsigned long entrylo0,
609 unsigned long entrylo1,
610 int flush_dcache_mask);
611 extern void kvm_mips_flush_host_tlb(int skip_kseg0);
612 extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi);
614 extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu,
615 unsigned long entryhi);
616 extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr);
617 extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
619 extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
620 struct kvm_vcpu *vcpu);
621 extern void kvm_local_flush_tlb_all(void);
622 extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu);
623 extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
624 extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu);
627 u32 kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu);
628 enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause);
630 extern enum emulation_result kvm_mips_emulate_inst(u32 cause,
633 struct kvm_vcpu *vcpu);
635 extern enum emulation_result kvm_mips_emulate_syscall(u32 cause,
638 struct kvm_vcpu *vcpu);
640 extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause,
643 struct kvm_vcpu *vcpu);
645 extern enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause,
648 struct kvm_vcpu *vcpu);
650 extern enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause,
653 struct kvm_vcpu *vcpu);
655 extern enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause,
658 struct kvm_vcpu *vcpu);
660 extern enum emulation_result kvm_mips_emulate_tlbmod(u32 cause,
663 struct kvm_vcpu *vcpu);
665 extern enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause,
668 struct kvm_vcpu *vcpu);
670 extern enum emulation_result kvm_mips_handle_ri(u32 cause,
673 struct kvm_vcpu *vcpu);
675 extern enum emulation_result kvm_mips_emulate_ri_exc(u32 cause,
678 struct kvm_vcpu *vcpu);
680 extern enum emulation_result kvm_mips_emulate_bp_exc(u32 cause,
683 struct kvm_vcpu *vcpu);
685 extern enum emulation_result kvm_mips_emulate_trap_exc(u32 cause,
688 struct kvm_vcpu *vcpu);
690 extern enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause,
693 struct kvm_vcpu *vcpu);
695 extern enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause,
698 struct kvm_vcpu *vcpu);
700 extern enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause,
703 struct kvm_vcpu *vcpu);
705 extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
706 struct kvm_run *run);
708 u32 kvm_mips_read_count(struct kvm_vcpu *vcpu);
709 void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count);
710 void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack);
711 void kvm_mips_init_count(struct kvm_vcpu *vcpu);
712 int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl);
713 int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume);
714 int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz);
715 void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu);
716 void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu);
717 enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu);
719 enum emulation_result kvm_mips_check_privilege(u32 cause,
722 struct kvm_vcpu *vcpu);
724 enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst,
728 struct kvm_vcpu *vcpu);
729 enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst,
733 struct kvm_vcpu *vcpu);
734 enum emulation_result kvm_mips_emulate_store(union mips_instruction inst,
737 struct kvm_vcpu *vcpu);
738 enum emulation_result kvm_mips_emulate_load(union mips_instruction inst,
741 struct kvm_vcpu *vcpu);
743 unsigned int kvm_mips_config1_wrmask(struct kvm_vcpu *vcpu);
744 unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu);
745 unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu);
746 unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu);
748 /* Dynamic binary translation */
749 extern int kvm_mips_trans_cache_index(union mips_instruction inst,
750 u32 *opc, struct kvm_vcpu *vcpu);
751 extern int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc,
752 struct kvm_vcpu *vcpu);
753 extern int kvm_mips_trans_mfc0(union mips_instruction inst, u32 *opc,
754 struct kvm_vcpu *vcpu);
755 extern int kvm_mips_trans_mtc0(union mips_instruction inst, u32 *opc,
756 struct kvm_vcpu *vcpu);
759 extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu);
760 extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm);
762 static inline void kvm_arch_hardware_disable(void) {}
763 static inline void kvm_arch_hardware_unsetup(void) {}
764 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
765 static inline void kvm_arch_free_memslot(struct kvm *kvm,
766 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
767 static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
768 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
769 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
770 struct kvm_memory_slot *slot) {}
771 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
772 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
773 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
774 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
775 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
777 #endif /* __MIPS_KVM_HOST_H__ */