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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *
4 * Copyright IBM Corp. 2007
5 * Copyright 2011 Freescale Semiconductor, Inc.
6 *
7 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
8 */
9
10#include <asm/ppc_asm.h>
11#include <asm/kvm_asm.h>
12#include <asm/reg.h>
13#include <asm/page.h>
14#include <asm/asm-offsets.h>
15
16/* The host stack layout: */
17#define HOST_R1 0 /* Implied by stwu. */
18#define HOST_CALLEE_LR 4
19#define HOST_RUN 8
20/* r2 is special: it holds 'current', and it made nonvolatile in the
21 * kernel with the -ffixed-r2 gcc option. */
22#define HOST_R2 12
23#define HOST_CR 16
24#define HOST_NV_GPRS 20
25#define __HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * 4))
26#define HOST_NV_GPR(n) __HOST_NV_GPR(__REG_##n)
27#define HOST_MIN_STACK_SIZE (HOST_NV_GPR(R31) + 4)
28#define HOST_STACK_SIZE (((HOST_MIN_STACK_SIZE + 15) / 16) * 16) /* Align. */
29#define HOST_STACK_LR (HOST_STACK_SIZE + 4) /* In caller stack frame. */
30
31#define NEED_INST_MASK ((1<<BOOKE_INTERRUPT_PROGRAM) | \
32 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
33 (1<<BOOKE_INTERRUPT_DEBUG))
34
35#define NEED_DEAR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
36 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
37 (1<<BOOKE_INTERRUPT_ALIGNMENT))
38
39#define NEED_ESR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
40 (1<<BOOKE_INTERRUPT_INST_STORAGE) | \
41 (1<<BOOKE_INTERRUPT_PROGRAM) | \
42 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
43 (1<<BOOKE_INTERRUPT_ALIGNMENT))
44
45.macro __KVM_HANDLER ivor_nr scratch srr0
46 /* Get pointer to vcpu and record exit number. */
47 mtspr \scratch , r4
48 mfspr r4, SPRN_SPRG_THREAD
49 lwz r4, THREAD_KVM_VCPU(r4)
50 stw r3, VCPU_GPR(R3)(r4)
51 stw r5, VCPU_GPR(R5)(r4)
52 stw r6, VCPU_GPR(R6)(r4)
53 mfspr r3, \scratch
54 mfctr r5
55 stw r3, VCPU_GPR(R4)(r4)
56 stw r5, VCPU_CTR(r4)
57 mfspr r3, \srr0
58 lis r6, kvmppc_resume_host@h
59 stw r3, VCPU_PC(r4)
60 li r5, \ivor_nr
61 ori r6, r6, kvmppc_resume_host@l
62 mtctr r6
63 bctr
64.endm
65
66.macro KVM_HANDLER ivor_nr scratch srr0
67_GLOBAL(kvmppc_handler_\ivor_nr)
68 __KVM_HANDLER \ivor_nr \scratch \srr0
69.endm
70
71.macro KVM_DBG_HANDLER ivor_nr scratch srr0
72_GLOBAL(kvmppc_handler_\ivor_nr)
73 mtspr \scratch, r4
74 mfspr r4, SPRN_SPRG_THREAD
75 lwz r4, THREAD_KVM_VCPU(r4)
76 stw r3, VCPU_CRIT_SAVE(r4)
77 mfcr r3
78 mfspr r4, SPRN_CSRR1
79 andi. r4, r4, MSR_PR
80 bne 1f
81 /* debug interrupt happened in enter/exit path */
82 mfspr r4, SPRN_CSRR1
83 rlwinm r4, r4, 0, ~MSR_DE
84 mtspr SPRN_CSRR1, r4
85 lis r4, 0xffff
86 ori r4, r4, 0xffff
87 mtspr SPRN_DBSR, r4
88 mfspr r4, SPRN_SPRG_THREAD
89 lwz r4, THREAD_KVM_VCPU(r4)
90 mtcr r3
91 lwz r3, VCPU_CRIT_SAVE(r4)
92 mfspr r4, \scratch
93 rfci
941: /* debug interrupt happened in guest */
95 mtcr r3
96 mfspr r4, SPRN_SPRG_THREAD
97 lwz r4, THREAD_KVM_VCPU(r4)
98 lwz r3, VCPU_CRIT_SAVE(r4)
99 mfspr r4, \scratch
100 __KVM_HANDLER \ivor_nr \scratch \srr0
101.endm
102
103.macro KVM_HANDLER_ADDR ivor_nr
104 .long kvmppc_handler_\ivor_nr
105.endm
106
107.macro KVM_HANDLER_END
108 .long kvmppc_handlers_end
109.endm
110
111_GLOBAL(kvmppc_handlers_start)
112KVM_HANDLER BOOKE_INTERRUPT_CRITICAL SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
113KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK SPRN_SPRG_RSCRATCH_MC SPRN_MCSRR0
114KVM_HANDLER BOOKE_INTERRUPT_DATA_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
115KVM_HANDLER BOOKE_INTERRUPT_INST_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
116KVM_HANDLER BOOKE_INTERRUPT_EXTERNAL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
117KVM_HANDLER BOOKE_INTERRUPT_ALIGNMENT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
118KVM_HANDLER BOOKE_INTERRUPT_PROGRAM SPRN_SPRG_RSCRATCH0 SPRN_SRR0
119KVM_HANDLER BOOKE_INTERRUPT_FP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
120KVM_HANDLER BOOKE_INTERRUPT_SYSCALL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
121KVM_HANDLER BOOKE_INTERRUPT_AP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
122KVM_HANDLER BOOKE_INTERRUPT_DECREMENTER SPRN_SPRG_RSCRATCH0 SPRN_SRR0
123KVM_HANDLER BOOKE_INTERRUPT_FIT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
124KVM_HANDLER BOOKE_INTERRUPT_WATCHDOG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
125KVM_HANDLER BOOKE_INTERRUPT_DTLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
126KVM_HANDLER BOOKE_INTERRUPT_ITLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
127KVM_DBG_HANDLER BOOKE_INTERRUPT_DEBUG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
128KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
129KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA SPRN_SPRG_RSCRATCH0 SPRN_SRR0
130KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND SPRN_SPRG_RSCRATCH0 SPRN_SRR0
131_GLOBAL(kvmppc_handlers_end)
132
133/* Registers:
134 * SPRG_SCRATCH0: guest r4
135 * r4: vcpu pointer
136 * r5: KVM exit number
137 */
138_GLOBAL(kvmppc_resume_host)
139 mfcr r3
140 stw r3, VCPU_CR(r4)
141 stw r7, VCPU_GPR(R7)(r4)
142 stw r8, VCPU_GPR(R8)(r4)
143 stw r9, VCPU_GPR(R9)(r4)
144
145 li r6, 1
146 slw r6, r6, r5
147
148#ifdef CONFIG_KVM_EXIT_TIMING
149 /* save exit time */
1501:
151 mfspr r7, SPRN_TBRU
152 mfspr r8, SPRN_TBRL
153 mfspr r9, SPRN_TBRU
154 cmpw r9, r7
155 bne 1b
156 stw r8, VCPU_TIMING_EXIT_TBL(r4)
157 stw r9, VCPU_TIMING_EXIT_TBU(r4)
158#endif
159
160 /* Save the faulting instruction and all GPRs for emulation. */
161 andi. r7, r6, NEED_INST_MASK
162 beq ..skip_inst_copy
163 mfspr r9, SPRN_SRR0
164 mfmsr r8
165 ori r7, r8, MSR_DS
166 mtmsr r7
167 isync
168 lwz r9, 0(r9)
169 mtmsr r8
170 isync
171 stw r9, VCPU_LAST_INST(r4)
172
173 stw r15, VCPU_GPR(R15)(r4)
174 stw r16, VCPU_GPR(R16)(r4)
175 stw r17, VCPU_GPR(R17)(r4)
176 stw r18, VCPU_GPR(R18)(r4)
177 stw r19, VCPU_GPR(R19)(r4)
178 stw r20, VCPU_GPR(R20)(r4)
179 stw r21, VCPU_GPR(R21)(r4)
180 stw r22, VCPU_GPR(R22)(r4)
181 stw r23, VCPU_GPR(R23)(r4)
182 stw r24, VCPU_GPR(R24)(r4)
183 stw r25, VCPU_GPR(R25)(r4)
184 stw r26, VCPU_GPR(R26)(r4)
185 stw r27, VCPU_GPR(R27)(r4)
186 stw r28, VCPU_GPR(R28)(r4)
187 stw r29, VCPU_GPR(R29)(r4)
188 stw r30, VCPU_GPR(R30)(r4)
189 stw r31, VCPU_GPR(R31)(r4)
190..skip_inst_copy:
191
192 /* Also grab DEAR and ESR before the host can clobber them. */
193
194 andi. r7, r6, NEED_DEAR_MASK
195 beq ..skip_dear
196 mfspr r9, SPRN_DEAR
197 stw r9, VCPU_FAULT_DEAR(r4)
198..skip_dear:
199
200 andi. r7, r6, NEED_ESR_MASK
201 beq ..skip_esr
202 mfspr r9, SPRN_ESR
203 stw r9, VCPU_FAULT_ESR(r4)
204..skip_esr:
205
206 /* Save remaining volatile guest register state to vcpu. */
207 stw r0, VCPU_GPR(R0)(r4)
208 stw r1, VCPU_GPR(R1)(r4)
209 stw r2, VCPU_GPR(R2)(r4)
210 stw r10, VCPU_GPR(R10)(r4)
211 stw r11, VCPU_GPR(R11)(r4)
212 stw r12, VCPU_GPR(R12)(r4)
213 stw r13, VCPU_GPR(R13)(r4)
214 stw r14, VCPU_GPR(R14)(r4) /* We need a NV GPR below. */
215 mflr r3
216 stw r3, VCPU_LR(r4)
217 mfxer r3
218 stw r3, VCPU_XER(r4)
219
220 /* Restore host stack pointer and PID before IVPR, since the host
221 * exception handlers use them. */
222 lwz r1, VCPU_HOST_STACK(r4)
223 lwz r3, VCPU_HOST_PID(r4)
224 mtspr SPRN_PID, r3
225
226#ifdef CONFIG_PPC_85xx
227 /* we cheat and know that Linux doesn't use PID1 which is always 0 */
228 lis r3, 0
229 mtspr SPRN_PID1, r3
230#endif
231
232 /* Restore host IVPR before re-enabling interrupts. We cheat and know
233 * that Linux IVPR is always 0xc0000000. */
234 lis r3, 0xc000
235 mtspr SPRN_IVPR, r3
236
237 /* Switch to kernel stack and jump to handler. */
238 LOAD_REG_ADDR(r3, kvmppc_handle_exit)
239 mtctr r3
240 mr r3, r4
241 lwz r2, HOST_R2(r1)
242 mr r14, r4 /* Save vcpu pointer. */
243
244 bctrl /* kvmppc_handle_exit() */
245
246 /* Restore vcpu pointer and the nonvolatiles we used. */
247 mr r4, r14
248 lwz r14, VCPU_GPR(R14)(r4)
249
250 /* Sometimes instruction emulation must restore complete GPR state. */
251 andi. r5, r3, RESUME_FLAG_NV
252 beq ..skip_nv_load
253 lwz r15, VCPU_GPR(R15)(r4)
254 lwz r16, VCPU_GPR(R16)(r4)
255 lwz r17, VCPU_GPR(R17)(r4)
256 lwz r18, VCPU_GPR(R18)(r4)
257 lwz r19, VCPU_GPR(R19)(r4)
258 lwz r20, VCPU_GPR(R20)(r4)
259 lwz r21, VCPU_GPR(R21)(r4)
260 lwz r22, VCPU_GPR(R22)(r4)
261 lwz r23, VCPU_GPR(R23)(r4)
262 lwz r24, VCPU_GPR(R24)(r4)
263 lwz r25, VCPU_GPR(R25)(r4)
264 lwz r26, VCPU_GPR(R26)(r4)
265 lwz r27, VCPU_GPR(R27)(r4)
266 lwz r28, VCPU_GPR(R28)(r4)
267 lwz r29, VCPU_GPR(R29)(r4)
268 lwz r30, VCPU_GPR(R30)(r4)
269 lwz r31, VCPU_GPR(R31)(r4)
270..skip_nv_load:
271
272 /* Should we return to the guest? */
273 andi. r5, r3, RESUME_FLAG_HOST
274 beq lightweight_exit
275
276 srawi r3, r3, 2 /* Shift -ERR back down. */
277
278heavyweight_exit:
279 /* Not returning to guest. */
280
281#ifdef CONFIG_SPE
282 /* save guest SPEFSCR and load host SPEFSCR */
283 mfspr r9, SPRN_SPEFSCR
284 stw r9, VCPU_SPEFSCR(r4)
285 lwz r9, VCPU_HOST_SPEFSCR(r4)
286 mtspr SPRN_SPEFSCR, r9
287#endif
288
289 /* We already saved guest volatile register state; now save the
290 * non-volatiles. */
291 stw r15, VCPU_GPR(R15)(r4)
292 stw r16, VCPU_GPR(R16)(r4)
293 stw r17, VCPU_GPR(R17)(r4)
294 stw r18, VCPU_GPR(R18)(r4)
295 stw r19, VCPU_GPR(R19)(r4)
296 stw r20, VCPU_GPR(R20)(r4)
297 stw r21, VCPU_GPR(R21)(r4)
298 stw r22, VCPU_GPR(R22)(r4)
299 stw r23, VCPU_GPR(R23)(r4)
300 stw r24, VCPU_GPR(R24)(r4)
301 stw r25, VCPU_GPR(R25)(r4)
302 stw r26, VCPU_GPR(R26)(r4)
303 stw r27, VCPU_GPR(R27)(r4)
304 stw r28, VCPU_GPR(R28)(r4)
305 stw r29, VCPU_GPR(R29)(r4)
306 stw r30, VCPU_GPR(R30)(r4)
307 stw r31, VCPU_GPR(R31)(r4)
308
309 /* Load host non-volatile register state from host stack. */
310 lwz r14, HOST_NV_GPR(R14)(r1)
311 lwz r15, HOST_NV_GPR(R15)(r1)
312 lwz r16, HOST_NV_GPR(R16)(r1)
313 lwz r17, HOST_NV_GPR(R17)(r1)
314 lwz r18, HOST_NV_GPR(R18)(r1)
315 lwz r19, HOST_NV_GPR(R19)(r1)
316 lwz r20, HOST_NV_GPR(R20)(r1)
317 lwz r21, HOST_NV_GPR(R21)(r1)
318 lwz r22, HOST_NV_GPR(R22)(r1)
319 lwz r23, HOST_NV_GPR(R23)(r1)
320 lwz r24, HOST_NV_GPR(R24)(r1)
321 lwz r25, HOST_NV_GPR(R25)(r1)
322 lwz r26, HOST_NV_GPR(R26)(r1)
323 lwz r27, HOST_NV_GPR(R27)(r1)
324 lwz r28, HOST_NV_GPR(R28)(r1)
325 lwz r29, HOST_NV_GPR(R29)(r1)
326 lwz r30, HOST_NV_GPR(R30)(r1)
327 lwz r31, HOST_NV_GPR(R31)(r1)
328
329 /* Return to kvm_vcpu_run(). */
330 lwz r4, HOST_STACK_LR(r1)
331 lwz r5, HOST_CR(r1)
332 addi r1, r1, HOST_STACK_SIZE
333 mtlr r4
334 mtcr r5
335 /* r3 still contains the return code from kvmppc_handle_exit(). */
336 blr
337
338
339/* Registers:
340 * r3: vcpu pointer
341 */
342_GLOBAL(__kvmppc_vcpu_run)
343 stwu r1, -HOST_STACK_SIZE(r1)
344 stw r1, VCPU_HOST_STACK(r3) /* Save stack pointer to vcpu. */
345
346 /* Save host state to stack. */
347 mr r4, r3
348 mflr r3
349 stw r3, HOST_STACK_LR(r1)
350 mfcr r5
351 stw r5, HOST_CR(r1)
352
353 /* Save host non-volatile register state to stack. */
354 stw r14, HOST_NV_GPR(R14)(r1)
355 stw r15, HOST_NV_GPR(R15)(r1)
356 stw r16, HOST_NV_GPR(R16)(r1)
357 stw r17, HOST_NV_GPR(R17)(r1)
358 stw r18, HOST_NV_GPR(R18)(r1)
359 stw r19, HOST_NV_GPR(R19)(r1)
360 stw r20, HOST_NV_GPR(R20)(r1)
361 stw r21, HOST_NV_GPR(R21)(r1)
362 stw r22, HOST_NV_GPR(R22)(r1)
363 stw r23, HOST_NV_GPR(R23)(r1)
364 stw r24, HOST_NV_GPR(R24)(r1)
365 stw r25, HOST_NV_GPR(R25)(r1)
366 stw r26, HOST_NV_GPR(R26)(r1)
367 stw r27, HOST_NV_GPR(R27)(r1)
368 stw r28, HOST_NV_GPR(R28)(r1)
369 stw r29, HOST_NV_GPR(R29)(r1)
370 stw r30, HOST_NV_GPR(R30)(r1)
371 stw r31, HOST_NV_GPR(R31)(r1)
372
373 /* Load guest non-volatiles. */
374 lwz r14, VCPU_GPR(R14)(r4)
375 lwz r15, VCPU_GPR(R15)(r4)
376 lwz r16, VCPU_GPR(R16)(r4)
377 lwz r17, VCPU_GPR(R17)(r4)
378 lwz r18, VCPU_GPR(R18)(r4)
379 lwz r19, VCPU_GPR(R19)(r4)
380 lwz r20, VCPU_GPR(R20)(r4)
381 lwz r21, VCPU_GPR(R21)(r4)
382 lwz r22, VCPU_GPR(R22)(r4)
383 lwz r23, VCPU_GPR(R23)(r4)
384 lwz r24, VCPU_GPR(R24)(r4)
385 lwz r25, VCPU_GPR(R25)(r4)
386 lwz r26, VCPU_GPR(R26)(r4)
387 lwz r27, VCPU_GPR(R27)(r4)
388 lwz r28, VCPU_GPR(R28)(r4)
389 lwz r29, VCPU_GPR(R29)(r4)
390 lwz r30, VCPU_GPR(R30)(r4)
391 lwz r31, VCPU_GPR(R31)(r4)
392
393#ifdef CONFIG_SPE
394 /* save host SPEFSCR and load guest SPEFSCR */
395 mfspr r3, SPRN_SPEFSCR
396 stw r3, VCPU_HOST_SPEFSCR(r4)
397 lwz r3, VCPU_SPEFSCR(r4)
398 mtspr SPRN_SPEFSCR, r3
399#endif
400
401lightweight_exit:
402 stw r2, HOST_R2(r1)
403
404 mfspr r3, SPRN_PID
405 stw r3, VCPU_HOST_PID(r4)
406 lwz r3, VCPU_SHADOW_PID(r4)
407 mtspr SPRN_PID, r3
408
409#ifdef CONFIG_PPC_85xx
410 lwz r3, VCPU_SHADOW_PID1(r4)
411 mtspr SPRN_PID1, r3
412#endif
413
414 /* Load some guest volatiles. */
415 lwz r0, VCPU_GPR(R0)(r4)
416 lwz r2, VCPU_GPR(R2)(r4)
417 lwz r9, VCPU_GPR(R9)(r4)
418 lwz r10, VCPU_GPR(R10)(r4)
419 lwz r11, VCPU_GPR(R11)(r4)
420 lwz r12, VCPU_GPR(R12)(r4)
421 lwz r13, VCPU_GPR(R13)(r4)
422 lwz r3, VCPU_LR(r4)
423 mtlr r3
424 lwz r3, VCPU_XER(r4)
425 mtxer r3
426
427 /* Switch the IVPR. XXX If we take a TLB miss after this we're screwed,
428 * so how do we make sure vcpu won't fault? */
429 lis r8, kvmppc_booke_handlers@ha
430 lwz r8, kvmppc_booke_handlers@l(r8)
431 mtspr SPRN_IVPR, r8
432
433 lwz r5, VCPU_SHARED(r4)
434
435 /* Can't switch the stack pointer until after IVPR is switched,
436 * because host interrupt handlers would get confused. */
437 lwz r1, VCPU_GPR(R1)(r4)
438
439 /*
440 * Host interrupt handlers may have clobbered these
441 * guest-readable SPRGs, or the guest kernel may have
442 * written directly to the shared area, so we
443 * need to reload them here with the guest's values.
444 */
445 PPC_LD(r3, VCPU_SHARED_SPRG4, r5)
446 mtspr SPRN_SPRG4W, r3
447 PPC_LD(r3, VCPU_SHARED_SPRG5, r5)
448 mtspr SPRN_SPRG5W, r3
449 PPC_LD(r3, VCPU_SHARED_SPRG6, r5)
450 mtspr SPRN_SPRG6W, r3
451 PPC_LD(r3, VCPU_SHARED_SPRG7, r5)
452 mtspr SPRN_SPRG7W, r3
453
454#ifdef CONFIG_KVM_EXIT_TIMING
455 /* save enter time */
4561:
457 mfspr r6, SPRN_TBRU
458 mfspr r7, SPRN_TBRL
459 mfspr r8, SPRN_TBRU
460 cmpw r8, r6
461 bne 1b
462 stw r7, VCPU_TIMING_LAST_ENTER_TBL(r4)
463 stw r8, VCPU_TIMING_LAST_ENTER_TBU(r4)
464#endif
465
466 /* Finish loading guest volatiles and jump to guest. */
467 lwz r3, VCPU_CTR(r4)
468 lwz r5, VCPU_CR(r4)
469 lwz r6, VCPU_PC(r4)
470 lwz r7, VCPU_SHADOW_MSR(r4)
471 mtctr r3
472 mtcr r5
473 mtsrr0 r6
474 mtsrr1 r7
475 lwz r5, VCPU_GPR(R5)(r4)
476 lwz r6, VCPU_GPR(R6)(r4)
477 lwz r7, VCPU_GPR(R7)(r4)
478 lwz r8, VCPU_GPR(R8)(r4)
479
480 /* Clear any debug events which occurred since we disabled MSR[DE].
481 * XXX This gives us a 3-instruction window in which a breakpoint
482 * intended for guest context could fire in the host instead. */
483 lis r3, 0xffff
484 ori r3, r3, 0xffff
485 mtspr SPRN_DBSR, r3
486
487 lwz r3, VCPU_GPR(R3)(r4)
488 lwz r4, VCPU_GPR(R4)(r4)
489 rfi
490
491 .data
492 .align 4
493 .globl kvmppc_booke_handler_addr
494kvmppc_booke_handler_addr:
495KVM_HANDLER_ADDR BOOKE_INTERRUPT_CRITICAL
496KVM_HANDLER_ADDR BOOKE_INTERRUPT_MACHINE_CHECK
497KVM_HANDLER_ADDR BOOKE_INTERRUPT_DATA_STORAGE
498KVM_HANDLER_ADDR BOOKE_INTERRUPT_INST_STORAGE
499KVM_HANDLER_ADDR BOOKE_INTERRUPT_EXTERNAL
500KVM_HANDLER_ADDR BOOKE_INTERRUPT_ALIGNMENT
501KVM_HANDLER_ADDR BOOKE_INTERRUPT_PROGRAM
502KVM_HANDLER_ADDR BOOKE_INTERRUPT_FP_UNAVAIL
503KVM_HANDLER_ADDR BOOKE_INTERRUPT_SYSCALL
504KVM_HANDLER_ADDR BOOKE_INTERRUPT_AP_UNAVAIL
505KVM_HANDLER_ADDR BOOKE_INTERRUPT_DECREMENTER
506KVM_HANDLER_ADDR BOOKE_INTERRUPT_FIT
507KVM_HANDLER_ADDR BOOKE_INTERRUPT_WATCHDOG
508KVM_HANDLER_ADDR BOOKE_INTERRUPT_DTLB_MISS
509KVM_HANDLER_ADDR BOOKE_INTERRUPT_ITLB_MISS
510KVM_HANDLER_ADDR BOOKE_INTERRUPT_DEBUG
511KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_UNAVAIL
512KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_DATA
513KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_ROUND
514KVM_HANDLER_END /*Always keep this in end*/
515
516#ifdef CONFIG_SPE
517_GLOBAL(kvmppc_save_guest_spe)
518 cmpi 0,r3,0
519 beqlr-
520 SAVE_32EVRS(0, r4, r3, VCPU_EVR)
521 evxor evr6, evr6, evr6
522 evmwumiaa evr6, evr6, evr6
523 li r4,VCPU_ACC
524 evstddx evr6, r4, r3 /* save acc */
525 blr
526
527_GLOBAL(kvmppc_load_guest_spe)
528 cmpi 0,r3,0
529 beqlr-
530 li r4,VCPU_ACC
531 evlddx evr6,r4,r3
532 evmra evr6,evr6 /* load acc */
533 REST_32EVRS(0, r4, r3, VCPU_EVR)
534 blr
535#endif
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2007
16 * Copyright 2011 Freescale Semiconductor, Inc.
17 *
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 */
20
21#include <asm/ppc_asm.h>
22#include <asm/kvm_asm.h>
23#include <asm/reg.h>
24#include <asm/mmu-44x.h>
25#include <asm/page.h>
26#include <asm/asm-offsets.h>
27
28/* The host stack layout: */
29#define HOST_R1 0 /* Implied by stwu. */
30#define HOST_CALLEE_LR 4
31#define HOST_RUN 8
32/* r2 is special: it holds 'current', and it made nonvolatile in the
33 * kernel with the -ffixed-r2 gcc option. */
34#define HOST_R2 12
35#define HOST_CR 16
36#define HOST_NV_GPRS 20
37#define __HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * 4))
38#define HOST_NV_GPR(n) __HOST_NV_GPR(__REG_##n)
39#define HOST_MIN_STACK_SIZE (HOST_NV_GPR(R31) + 4)
40#define HOST_STACK_SIZE (((HOST_MIN_STACK_SIZE + 15) / 16) * 16) /* Align. */
41#define HOST_STACK_LR (HOST_STACK_SIZE + 4) /* In caller stack frame. */
42
43#define NEED_INST_MASK ((1<<BOOKE_INTERRUPT_PROGRAM) | \
44 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
45 (1<<BOOKE_INTERRUPT_DEBUG))
46
47#define NEED_DEAR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
48 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
49 (1<<BOOKE_INTERRUPT_ALIGNMENT))
50
51#define NEED_ESR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
52 (1<<BOOKE_INTERRUPT_INST_STORAGE) | \
53 (1<<BOOKE_INTERRUPT_PROGRAM) | \
54 (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
55 (1<<BOOKE_INTERRUPT_ALIGNMENT))
56
57.macro __KVM_HANDLER ivor_nr scratch srr0
58 /* Get pointer to vcpu and record exit number. */
59 mtspr \scratch , r4
60 mfspr r4, SPRN_SPRG_THREAD
61 lwz r4, THREAD_KVM_VCPU(r4)
62 stw r3, VCPU_GPR(R3)(r4)
63 stw r5, VCPU_GPR(R5)(r4)
64 stw r6, VCPU_GPR(R6)(r4)
65 mfspr r3, \scratch
66 mfctr r5
67 stw r3, VCPU_GPR(R4)(r4)
68 stw r5, VCPU_CTR(r4)
69 mfspr r3, \srr0
70 lis r6, kvmppc_resume_host@h
71 stw r3, VCPU_PC(r4)
72 li r5, \ivor_nr
73 ori r6, r6, kvmppc_resume_host@l
74 mtctr r6
75 bctr
76.endm
77
78.macro KVM_HANDLER ivor_nr scratch srr0
79_GLOBAL(kvmppc_handler_\ivor_nr)
80 __KVM_HANDLER \ivor_nr \scratch \srr0
81.endm
82
83.macro KVM_DBG_HANDLER ivor_nr scratch srr0
84_GLOBAL(kvmppc_handler_\ivor_nr)
85 mtspr \scratch, r4
86 mfspr r4, SPRN_SPRG_THREAD
87 lwz r4, THREAD_KVM_VCPU(r4)
88 stw r3, VCPU_CRIT_SAVE(r4)
89 mfcr r3
90 mfspr r4, SPRN_CSRR1
91 andi. r4, r4, MSR_PR
92 bne 1f
93 /* debug interrupt happened in enter/exit path */
94 mfspr r4, SPRN_CSRR1
95 rlwinm r4, r4, 0, ~MSR_DE
96 mtspr SPRN_CSRR1, r4
97 lis r4, 0xffff
98 ori r4, r4, 0xffff
99 mtspr SPRN_DBSR, r4
100 mfspr r4, SPRN_SPRG_THREAD
101 lwz r4, THREAD_KVM_VCPU(r4)
102 mtcr r3
103 lwz r3, VCPU_CRIT_SAVE(r4)
104 mfspr r4, \scratch
105 rfci
1061: /* debug interrupt happened in guest */
107 mtcr r3
108 mfspr r4, SPRN_SPRG_THREAD
109 lwz r4, THREAD_KVM_VCPU(r4)
110 lwz r3, VCPU_CRIT_SAVE(r4)
111 mfspr r4, \scratch
112 __KVM_HANDLER \ivor_nr \scratch \srr0
113.endm
114
115.macro KVM_HANDLER_ADDR ivor_nr
116 .long kvmppc_handler_\ivor_nr
117.endm
118
119.macro KVM_HANDLER_END
120 .long kvmppc_handlers_end
121.endm
122
123_GLOBAL(kvmppc_handlers_start)
124KVM_HANDLER BOOKE_INTERRUPT_CRITICAL SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
125KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK SPRN_SPRG_RSCRATCH_MC SPRN_MCSRR0
126KVM_HANDLER BOOKE_INTERRUPT_DATA_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
127KVM_HANDLER BOOKE_INTERRUPT_INST_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
128KVM_HANDLER BOOKE_INTERRUPT_EXTERNAL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
129KVM_HANDLER BOOKE_INTERRUPT_ALIGNMENT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
130KVM_HANDLER BOOKE_INTERRUPT_PROGRAM SPRN_SPRG_RSCRATCH0 SPRN_SRR0
131KVM_HANDLER BOOKE_INTERRUPT_FP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
132KVM_HANDLER BOOKE_INTERRUPT_SYSCALL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
133KVM_HANDLER BOOKE_INTERRUPT_AP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
134KVM_HANDLER BOOKE_INTERRUPT_DECREMENTER SPRN_SPRG_RSCRATCH0 SPRN_SRR0
135KVM_HANDLER BOOKE_INTERRUPT_FIT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
136KVM_HANDLER BOOKE_INTERRUPT_WATCHDOG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
137KVM_HANDLER BOOKE_INTERRUPT_DTLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
138KVM_HANDLER BOOKE_INTERRUPT_ITLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
139KVM_DBG_HANDLER BOOKE_INTERRUPT_DEBUG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
140KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
141KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA SPRN_SPRG_RSCRATCH0 SPRN_SRR0
142KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND SPRN_SPRG_RSCRATCH0 SPRN_SRR0
143_GLOBAL(kvmppc_handlers_end)
144
145/* Registers:
146 * SPRG_SCRATCH0: guest r4
147 * r4: vcpu pointer
148 * r5: KVM exit number
149 */
150_GLOBAL(kvmppc_resume_host)
151 mfcr r3
152 stw r3, VCPU_CR(r4)
153 stw r7, VCPU_GPR(R7)(r4)
154 stw r8, VCPU_GPR(R8)(r4)
155 stw r9, VCPU_GPR(R9)(r4)
156
157 li r6, 1
158 slw r6, r6, r5
159
160#ifdef CONFIG_KVM_EXIT_TIMING
161 /* save exit time */
1621:
163 mfspr r7, SPRN_TBRU
164 mfspr r8, SPRN_TBRL
165 mfspr r9, SPRN_TBRU
166 cmpw r9, r7
167 bne 1b
168 stw r8, VCPU_TIMING_EXIT_TBL(r4)
169 stw r9, VCPU_TIMING_EXIT_TBU(r4)
170#endif
171
172 /* Save the faulting instruction and all GPRs for emulation. */
173 andi. r7, r6, NEED_INST_MASK
174 beq ..skip_inst_copy
175 mfspr r9, SPRN_SRR0
176 mfmsr r8
177 ori r7, r8, MSR_DS
178 mtmsr r7
179 isync
180 lwz r9, 0(r9)
181 mtmsr r8
182 isync
183 stw r9, VCPU_LAST_INST(r4)
184
185 stw r15, VCPU_GPR(R15)(r4)
186 stw r16, VCPU_GPR(R16)(r4)
187 stw r17, VCPU_GPR(R17)(r4)
188 stw r18, VCPU_GPR(R18)(r4)
189 stw r19, VCPU_GPR(R19)(r4)
190 stw r20, VCPU_GPR(R20)(r4)
191 stw r21, VCPU_GPR(R21)(r4)
192 stw r22, VCPU_GPR(R22)(r4)
193 stw r23, VCPU_GPR(R23)(r4)
194 stw r24, VCPU_GPR(R24)(r4)
195 stw r25, VCPU_GPR(R25)(r4)
196 stw r26, VCPU_GPR(R26)(r4)
197 stw r27, VCPU_GPR(R27)(r4)
198 stw r28, VCPU_GPR(R28)(r4)
199 stw r29, VCPU_GPR(R29)(r4)
200 stw r30, VCPU_GPR(R30)(r4)
201 stw r31, VCPU_GPR(R31)(r4)
202..skip_inst_copy:
203
204 /* Also grab DEAR and ESR before the host can clobber them. */
205
206 andi. r7, r6, NEED_DEAR_MASK
207 beq ..skip_dear
208 mfspr r9, SPRN_DEAR
209 stw r9, VCPU_FAULT_DEAR(r4)
210..skip_dear:
211
212 andi. r7, r6, NEED_ESR_MASK
213 beq ..skip_esr
214 mfspr r9, SPRN_ESR
215 stw r9, VCPU_FAULT_ESR(r4)
216..skip_esr:
217
218 /* Save remaining volatile guest register state to vcpu. */
219 stw r0, VCPU_GPR(R0)(r4)
220 stw r1, VCPU_GPR(R1)(r4)
221 stw r2, VCPU_GPR(R2)(r4)
222 stw r10, VCPU_GPR(R10)(r4)
223 stw r11, VCPU_GPR(R11)(r4)
224 stw r12, VCPU_GPR(R12)(r4)
225 stw r13, VCPU_GPR(R13)(r4)
226 stw r14, VCPU_GPR(R14)(r4) /* We need a NV GPR below. */
227 mflr r3
228 stw r3, VCPU_LR(r4)
229 mfxer r3
230 stw r3, VCPU_XER(r4)
231
232 /* Restore host stack pointer and PID before IVPR, since the host
233 * exception handlers use them. */
234 lwz r1, VCPU_HOST_STACK(r4)
235 lwz r3, VCPU_HOST_PID(r4)
236 mtspr SPRN_PID, r3
237
238#ifdef CONFIG_FSL_BOOKE
239 /* we cheat and know that Linux doesn't use PID1 which is always 0 */
240 lis r3, 0
241 mtspr SPRN_PID1, r3
242#endif
243
244 /* Restore host IVPR before re-enabling interrupts. We cheat and know
245 * that Linux IVPR is always 0xc0000000. */
246 lis r3, 0xc000
247 mtspr SPRN_IVPR, r3
248
249 /* Switch to kernel stack and jump to handler. */
250 LOAD_REG_ADDR(r3, kvmppc_handle_exit)
251 mtctr r3
252 lwz r3, HOST_RUN(r1)
253 lwz r2, HOST_R2(r1)
254 mr r14, r4 /* Save vcpu pointer. */
255
256 bctrl /* kvmppc_handle_exit() */
257
258 /* Restore vcpu pointer and the nonvolatiles we used. */
259 mr r4, r14
260 lwz r14, VCPU_GPR(R14)(r4)
261
262 /* Sometimes instruction emulation must restore complete GPR state. */
263 andi. r5, r3, RESUME_FLAG_NV
264 beq ..skip_nv_load
265 lwz r15, VCPU_GPR(R15)(r4)
266 lwz r16, VCPU_GPR(R16)(r4)
267 lwz r17, VCPU_GPR(R17)(r4)
268 lwz r18, VCPU_GPR(R18)(r4)
269 lwz r19, VCPU_GPR(R19)(r4)
270 lwz r20, VCPU_GPR(R20)(r4)
271 lwz r21, VCPU_GPR(R21)(r4)
272 lwz r22, VCPU_GPR(R22)(r4)
273 lwz r23, VCPU_GPR(R23)(r4)
274 lwz r24, VCPU_GPR(R24)(r4)
275 lwz r25, VCPU_GPR(R25)(r4)
276 lwz r26, VCPU_GPR(R26)(r4)
277 lwz r27, VCPU_GPR(R27)(r4)
278 lwz r28, VCPU_GPR(R28)(r4)
279 lwz r29, VCPU_GPR(R29)(r4)
280 lwz r30, VCPU_GPR(R30)(r4)
281 lwz r31, VCPU_GPR(R31)(r4)
282..skip_nv_load:
283
284 /* Should we return to the guest? */
285 andi. r5, r3, RESUME_FLAG_HOST
286 beq lightweight_exit
287
288 srawi r3, r3, 2 /* Shift -ERR back down. */
289
290heavyweight_exit:
291 /* Not returning to guest. */
292
293#ifdef CONFIG_SPE
294 /* save guest SPEFSCR and load host SPEFSCR */
295 mfspr r9, SPRN_SPEFSCR
296 stw r9, VCPU_SPEFSCR(r4)
297 lwz r9, VCPU_HOST_SPEFSCR(r4)
298 mtspr SPRN_SPEFSCR, r9
299#endif
300
301 /* We already saved guest volatile register state; now save the
302 * non-volatiles. */
303 stw r15, VCPU_GPR(R15)(r4)
304 stw r16, VCPU_GPR(R16)(r4)
305 stw r17, VCPU_GPR(R17)(r4)
306 stw r18, VCPU_GPR(R18)(r4)
307 stw r19, VCPU_GPR(R19)(r4)
308 stw r20, VCPU_GPR(R20)(r4)
309 stw r21, VCPU_GPR(R21)(r4)
310 stw r22, VCPU_GPR(R22)(r4)
311 stw r23, VCPU_GPR(R23)(r4)
312 stw r24, VCPU_GPR(R24)(r4)
313 stw r25, VCPU_GPR(R25)(r4)
314 stw r26, VCPU_GPR(R26)(r4)
315 stw r27, VCPU_GPR(R27)(r4)
316 stw r28, VCPU_GPR(R28)(r4)
317 stw r29, VCPU_GPR(R29)(r4)
318 stw r30, VCPU_GPR(R30)(r4)
319 stw r31, VCPU_GPR(R31)(r4)
320
321 /* Load host non-volatile register state from host stack. */
322 lwz r14, HOST_NV_GPR(R14)(r1)
323 lwz r15, HOST_NV_GPR(R15)(r1)
324 lwz r16, HOST_NV_GPR(R16)(r1)
325 lwz r17, HOST_NV_GPR(R17)(r1)
326 lwz r18, HOST_NV_GPR(R18)(r1)
327 lwz r19, HOST_NV_GPR(R19)(r1)
328 lwz r20, HOST_NV_GPR(R20)(r1)
329 lwz r21, HOST_NV_GPR(R21)(r1)
330 lwz r22, HOST_NV_GPR(R22)(r1)
331 lwz r23, HOST_NV_GPR(R23)(r1)
332 lwz r24, HOST_NV_GPR(R24)(r1)
333 lwz r25, HOST_NV_GPR(R25)(r1)
334 lwz r26, HOST_NV_GPR(R26)(r1)
335 lwz r27, HOST_NV_GPR(R27)(r1)
336 lwz r28, HOST_NV_GPR(R28)(r1)
337 lwz r29, HOST_NV_GPR(R29)(r1)
338 lwz r30, HOST_NV_GPR(R30)(r1)
339 lwz r31, HOST_NV_GPR(R31)(r1)
340
341 /* Return to kvm_vcpu_run(). */
342 lwz r4, HOST_STACK_LR(r1)
343 lwz r5, HOST_CR(r1)
344 addi r1, r1, HOST_STACK_SIZE
345 mtlr r4
346 mtcr r5
347 /* r3 still contains the return code from kvmppc_handle_exit(). */
348 blr
349
350
351/* Registers:
352 * r3: kvm_run pointer
353 * r4: vcpu pointer
354 */
355_GLOBAL(__kvmppc_vcpu_run)
356 stwu r1, -HOST_STACK_SIZE(r1)
357 stw r1, VCPU_HOST_STACK(r4) /* Save stack pointer to vcpu. */
358
359 /* Save host state to stack. */
360 stw r3, HOST_RUN(r1)
361 mflr r3
362 stw r3, HOST_STACK_LR(r1)
363 mfcr r5
364 stw r5, HOST_CR(r1)
365
366 /* Save host non-volatile register state to stack. */
367 stw r14, HOST_NV_GPR(R14)(r1)
368 stw r15, HOST_NV_GPR(R15)(r1)
369 stw r16, HOST_NV_GPR(R16)(r1)
370 stw r17, HOST_NV_GPR(R17)(r1)
371 stw r18, HOST_NV_GPR(R18)(r1)
372 stw r19, HOST_NV_GPR(R19)(r1)
373 stw r20, HOST_NV_GPR(R20)(r1)
374 stw r21, HOST_NV_GPR(R21)(r1)
375 stw r22, HOST_NV_GPR(R22)(r1)
376 stw r23, HOST_NV_GPR(R23)(r1)
377 stw r24, HOST_NV_GPR(R24)(r1)
378 stw r25, HOST_NV_GPR(R25)(r1)
379 stw r26, HOST_NV_GPR(R26)(r1)
380 stw r27, HOST_NV_GPR(R27)(r1)
381 stw r28, HOST_NV_GPR(R28)(r1)
382 stw r29, HOST_NV_GPR(R29)(r1)
383 stw r30, HOST_NV_GPR(R30)(r1)
384 stw r31, HOST_NV_GPR(R31)(r1)
385
386 /* Load guest non-volatiles. */
387 lwz r14, VCPU_GPR(R14)(r4)
388 lwz r15, VCPU_GPR(R15)(r4)
389 lwz r16, VCPU_GPR(R16)(r4)
390 lwz r17, VCPU_GPR(R17)(r4)
391 lwz r18, VCPU_GPR(R18)(r4)
392 lwz r19, VCPU_GPR(R19)(r4)
393 lwz r20, VCPU_GPR(R20)(r4)
394 lwz r21, VCPU_GPR(R21)(r4)
395 lwz r22, VCPU_GPR(R22)(r4)
396 lwz r23, VCPU_GPR(R23)(r4)
397 lwz r24, VCPU_GPR(R24)(r4)
398 lwz r25, VCPU_GPR(R25)(r4)
399 lwz r26, VCPU_GPR(R26)(r4)
400 lwz r27, VCPU_GPR(R27)(r4)
401 lwz r28, VCPU_GPR(R28)(r4)
402 lwz r29, VCPU_GPR(R29)(r4)
403 lwz r30, VCPU_GPR(R30)(r4)
404 lwz r31, VCPU_GPR(R31)(r4)
405
406#ifdef CONFIG_SPE
407 /* save host SPEFSCR and load guest SPEFSCR */
408 mfspr r3, SPRN_SPEFSCR
409 stw r3, VCPU_HOST_SPEFSCR(r4)
410 lwz r3, VCPU_SPEFSCR(r4)
411 mtspr SPRN_SPEFSCR, r3
412#endif
413
414lightweight_exit:
415 stw r2, HOST_R2(r1)
416
417 mfspr r3, SPRN_PID
418 stw r3, VCPU_HOST_PID(r4)
419 lwz r3, VCPU_SHADOW_PID(r4)
420 mtspr SPRN_PID, r3
421
422#ifdef CONFIG_FSL_BOOKE
423 lwz r3, VCPU_SHADOW_PID1(r4)
424 mtspr SPRN_PID1, r3
425#endif
426
427#ifdef CONFIG_44x
428 iccci 0, 0 /* XXX hack */
429#endif
430
431 /* Load some guest volatiles. */
432 lwz r0, VCPU_GPR(R0)(r4)
433 lwz r2, VCPU_GPR(R2)(r4)
434 lwz r9, VCPU_GPR(R9)(r4)
435 lwz r10, VCPU_GPR(R10)(r4)
436 lwz r11, VCPU_GPR(R11)(r4)
437 lwz r12, VCPU_GPR(R12)(r4)
438 lwz r13, VCPU_GPR(R13)(r4)
439 lwz r3, VCPU_LR(r4)
440 mtlr r3
441 lwz r3, VCPU_XER(r4)
442 mtxer r3
443
444 /* Switch the IVPR. XXX If we take a TLB miss after this we're screwed,
445 * so how do we make sure vcpu won't fault? */
446 lis r8, kvmppc_booke_handlers@ha
447 lwz r8, kvmppc_booke_handlers@l(r8)
448 mtspr SPRN_IVPR, r8
449
450 lwz r5, VCPU_SHARED(r4)
451
452 /* Can't switch the stack pointer until after IVPR is switched,
453 * because host interrupt handlers would get confused. */
454 lwz r1, VCPU_GPR(R1)(r4)
455
456 /*
457 * Host interrupt handlers may have clobbered these
458 * guest-readable SPRGs, or the guest kernel may have
459 * written directly to the shared area, so we
460 * need to reload them here with the guest's values.
461 */
462 PPC_LD(r3, VCPU_SHARED_SPRG4, r5)
463 mtspr SPRN_SPRG4W, r3
464 PPC_LD(r3, VCPU_SHARED_SPRG5, r5)
465 mtspr SPRN_SPRG5W, r3
466 PPC_LD(r3, VCPU_SHARED_SPRG6, r5)
467 mtspr SPRN_SPRG6W, r3
468 PPC_LD(r3, VCPU_SHARED_SPRG7, r5)
469 mtspr SPRN_SPRG7W, r3
470
471#ifdef CONFIG_KVM_EXIT_TIMING
472 /* save enter time */
4731:
474 mfspr r6, SPRN_TBRU
475 mfspr r7, SPRN_TBRL
476 mfspr r8, SPRN_TBRU
477 cmpw r8, r6
478 bne 1b
479 stw r7, VCPU_TIMING_LAST_ENTER_TBL(r4)
480 stw r8, VCPU_TIMING_LAST_ENTER_TBU(r4)
481#endif
482
483 /* Finish loading guest volatiles and jump to guest. */
484 lwz r3, VCPU_CTR(r4)
485 lwz r5, VCPU_CR(r4)
486 lwz r6, VCPU_PC(r4)
487 lwz r7, VCPU_SHADOW_MSR(r4)
488 mtctr r3
489 mtcr r5
490 mtsrr0 r6
491 mtsrr1 r7
492 lwz r5, VCPU_GPR(R5)(r4)
493 lwz r6, VCPU_GPR(R6)(r4)
494 lwz r7, VCPU_GPR(R7)(r4)
495 lwz r8, VCPU_GPR(R8)(r4)
496
497 /* Clear any debug events which occurred since we disabled MSR[DE].
498 * XXX This gives us a 3-instruction window in which a breakpoint
499 * intended for guest context could fire in the host instead. */
500 lis r3, 0xffff
501 ori r3, r3, 0xffff
502 mtspr SPRN_DBSR, r3
503
504 lwz r3, VCPU_GPR(R3)(r4)
505 lwz r4, VCPU_GPR(R4)(r4)
506 rfi
507
508 .data
509 .align 4
510 .globl kvmppc_booke_handler_addr
511kvmppc_booke_handler_addr:
512KVM_HANDLER_ADDR BOOKE_INTERRUPT_CRITICAL
513KVM_HANDLER_ADDR BOOKE_INTERRUPT_MACHINE_CHECK
514KVM_HANDLER_ADDR BOOKE_INTERRUPT_DATA_STORAGE
515KVM_HANDLER_ADDR BOOKE_INTERRUPT_INST_STORAGE
516KVM_HANDLER_ADDR BOOKE_INTERRUPT_EXTERNAL
517KVM_HANDLER_ADDR BOOKE_INTERRUPT_ALIGNMENT
518KVM_HANDLER_ADDR BOOKE_INTERRUPT_PROGRAM
519KVM_HANDLER_ADDR BOOKE_INTERRUPT_FP_UNAVAIL
520KVM_HANDLER_ADDR BOOKE_INTERRUPT_SYSCALL
521KVM_HANDLER_ADDR BOOKE_INTERRUPT_AP_UNAVAIL
522KVM_HANDLER_ADDR BOOKE_INTERRUPT_DECREMENTER
523KVM_HANDLER_ADDR BOOKE_INTERRUPT_FIT
524KVM_HANDLER_ADDR BOOKE_INTERRUPT_WATCHDOG
525KVM_HANDLER_ADDR BOOKE_INTERRUPT_DTLB_MISS
526KVM_HANDLER_ADDR BOOKE_INTERRUPT_ITLB_MISS
527KVM_HANDLER_ADDR BOOKE_INTERRUPT_DEBUG
528KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_UNAVAIL
529KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_DATA
530KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_ROUND
531KVM_HANDLER_END /*Always keep this in end*/
532
533#ifdef CONFIG_SPE
534_GLOBAL(kvmppc_save_guest_spe)
535 cmpi 0,r3,0
536 beqlr-
537 SAVE_32EVRS(0, r4, r3, VCPU_EVR)
538 evxor evr6, evr6, evr6
539 evmwumiaa evr6, evr6, evr6
540 li r4,VCPU_ACC
541 evstddx evr6, r4, r3 /* save acc */
542 blr
543
544_GLOBAL(kvmppc_load_guest_spe)
545 cmpi 0,r3,0
546 beqlr-
547 li r4,VCPU_ACC
548 evlddx evr6,r4,r3
549 evmra evr6,evr6 /* load acc */
550 REST_32EVRS(0, r4, r3, VCPU_EVR)
551 blr
552#endif