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.
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.
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.
15 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
17 * Author: Varun Sethi <varun.sethi@freescale.com>
18 * Author: Scott Wood <scotwood@freescale.com>
20 * This file is derived from arch/powerpc/kvm/booke_interrupts.S
23 #include <asm/ppc_asm.h>
24 #include <asm/kvm_asm.h>
26 #include <asm/mmu-44x.h>
28 #include <asm/asm-compat.h>
29 #include <asm/asm-offsets.h>
30 #include <asm/bitsperlong.h>
31 #include <asm/thread_info.h>
33 #include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */
35 #define GET_VCPU(vcpu, thread) \
36 PPC_LL vcpu, THREAD_KVM_VCPU(thread)
38 #define LONGBYTES (BITS_PER_LONG / 8)
40 #define VCPU_GUEST_SPRG(n) (VCPU_GUEST_SPRGS + (n * LONGBYTES))
42 /* The host stack layout: */
43 #define HOST_R1 (0 * LONGBYTES) /* Implied by stwu. */
44 #define HOST_CALLEE_LR (1 * LONGBYTES)
45 #define HOST_RUN (2 * LONGBYTES) /* struct kvm_run */
47 * r2 is special: it holds 'current', and it made nonvolatile in the
48 * kernel with the -ffixed-r2 gcc option.
50 #define HOST_R2 (3 * LONGBYTES)
51 #define HOST_CR (4 * LONGBYTES)
52 #define HOST_NV_GPRS (5 * LONGBYTES)
53 #define HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * LONGBYTES))
54 #define HOST_MIN_STACK_SIZE (HOST_NV_GPR(31) + LONGBYTES)
55 #define HOST_STACK_SIZE ((HOST_MIN_STACK_SIZE + 15) & ~15) /* Align. */
56 #define HOST_STACK_LR (HOST_STACK_SIZE + LONGBYTES) /* In caller stack frame. */
58 #define NEED_EMU 0x00000001 /* emulation -- save nv regs */
59 #define NEED_DEAR 0x00000002 /* save faulting DEAR */
60 #define NEED_ESR 0x00000004 /* save faulting ESR */
64 * r4 = vcpu, r5 = srr0, r6 = srr1
65 * saved in vcpu: cr, ctr, r3-r13
67 .macro kvm_handler_common intno, srr0, flags
68 /* Restore host stack pointer */
69 PPC_STL r1, VCPU_GPR(R1)(r4)
70 PPC_STL r2, VCPU_GPR(R2)(r4)
71 PPC_LL r1, VCPU_HOST_STACK(r4)
72 PPC_LL r2, HOST_R2(r1)
75 lwz r8, VCPU_HOST_PID(r4)
76 PPC_LL r11, VCPU_SHARED(r4)
77 PPC_STL r14, VCPU_GPR(R14)(r4) /* We need a non-volatile GPR. */
80 stw r10, VCPU_GUEST_PID(r4)
83 #ifdef CONFIG_KVM_EXIT_TIMING
85 1: mfspr r7, SPRN_TBRU
89 stw r8, VCPU_TIMING_EXIT_TBL(r4)
91 stw r9, VCPU_TIMING_EXIT_TBU(r4)
95 PPC_STD(r6, VCPU_SHARED_MSR, r11)
96 ori r8, r8, MSR_ME | MSR_RI
97 PPC_STL r5, VCPU_PC(r4)
100 * Make sure CE/ME/RI are set (if appropriate for exception type)
101 * whether or not the guest had it set. Since mfmsr/mtmsr are
102 * somewhat expensive, skip in the common case where the guest
103 * had all these bits set (and thus they're still set if
104 * appropriate for the exception type).
109 .if \srr0 != SPRN_MCSRR0 && \srr0 != SPRN_CSRR0
110 oris r7, r7, MSR_CE@h
112 .if \srr0 != SPRN_MCSRR0
113 ori r7, r7, MSR_ME | MSR_RI
118 .if \flags & NEED_EMU
120 * This assumes you have external PID support.
121 * To support a bookehv CPU without external PID, you'll
122 * need to look up the TLB entry and create a temporary mapping.
124 * FIXME: we don't currently handle if the lwepx faults. PR-mode
125 * booke doesn't handle it either. Since Linux doesn't use
126 * broadcast tlbivax anymore, the only way this should happen is
127 * if the guest maps its memory execute-but-not-read, or if we
128 * somehow take a TLB miss in the middle of this entry code and
129 * evict the relevant entry. On e500mc, all kernel lowmem is
130 * bolted into TLB1 large page mappings, and we don't use
131 * broadcast invalidates, so we should not take a TLB miss here.
133 * Later we'll need to deal with faults here. Disallowing guest
134 * mappings that are execute-but-not-read could be an option on
135 * e500mc, but not on chips with an LRAT if it is used.
138 mfspr r3, SPRN_EPLC /* will already have correct ELPID and EGS */
139 PPC_STL r15, VCPU_GPR(R15)(r4)
140 PPC_STL r16, VCPU_GPR(R16)(r4)
141 PPC_STL r17, VCPU_GPR(R17)(r4)
142 PPC_STL r18, VCPU_GPR(R18)(r4)
143 PPC_STL r19, VCPU_GPR(R19)(r4)
145 PPC_STL r20, VCPU_GPR(R20)(r4)
146 rlwimi r8, r6, EPC_EAS_SHIFT - MSR_IR_LG, EPC_EAS
147 PPC_STL r21, VCPU_GPR(R21)(r4)
148 rlwimi r8, r6, EPC_EPR_SHIFT - MSR_PR_LG, EPC_EPR
149 PPC_STL r22, VCPU_GPR(R22)(r4)
150 rlwimi r8, r10, EPC_EPID_SHIFT, EPC_EPID
151 PPC_STL r23, VCPU_GPR(R23)(r4)
152 PPC_STL r24, VCPU_GPR(R24)(r4)
153 PPC_STL r25, VCPU_GPR(R25)(r4)
154 PPC_STL r26, VCPU_GPR(R26)(r4)
155 PPC_STL r27, VCPU_GPR(R27)(r4)
156 PPC_STL r28, VCPU_GPR(R28)(r4)
157 PPC_STL r29, VCPU_GPR(R29)(r4)
158 PPC_STL r30, VCPU_GPR(R30)(r4)
159 PPC_STL r31, VCPU_GPR(R31)(r4)
162 /* disable preemption, so we are sure we hit the fixup handler */
164 clrrdi r8,r1,THREAD_SHIFT
166 rlwinm r8,r1,0,0,31-THREAD_SHIFT /* current thread_info */
169 stw r7, TI_PREEMPT(r8)
174 * In case the read goes wrong, we catch it and write an invalid value
175 * in LAST_INST instead.
179 .section .fixup, "ax"
180 3: li r9, KVM_INST_FETCH_FAILED
183 .section __ex_table,"a"
190 stw r7, TI_PREEMPT(r8)
191 stw r9, VCPU_LAST_INST(r4)
194 .if \flags & NEED_ESR
196 PPC_STL r8, VCPU_FAULT_ESR(r4)
199 .if \flags & NEED_DEAR
201 PPC_STL r9, VCPU_FAULT_DEAR(r4)
208 * For input register values, see arch/powerpc/include/asm/kvm_booke_hv_asm.h
210 .macro kvm_handler intno srr0, srr1, flags
211 _GLOBAL(kvmppc_handler_\intno\()_\srr1)
213 PPC_STL r3, VCPU_GPR(R3)(r11)
214 mfspr r3, SPRN_SPRG_RSCRATCH0
215 PPC_STL r4, VCPU_GPR(R4)(r11)
216 PPC_LL r4, THREAD_NORMSAVE(0)(r10)
217 PPC_STL r5, VCPU_GPR(R5)(r11)
218 stw r13, VCPU_CR(r11)
220 PPC_STL r3, VCPU_GPR(R10)(r11)
221 PPC_LL r3, THREAD_NORMSAVE(2)(r10)
222 PPC_STL r6, VCPU_GPR(R6)(r11)
223 PPC_STL r4, VCPU_GPR(R11)(r11)
225 PPC_STL r7, VCPU_GPR(R7)(r11)
226 PPC_STL r8, VCPU_GPR(R8)(r11)
227 PPC_STL r9, VCPU_GPR(R9)(r11)
228 PPC_STL r3, VCPU_GPR(R13)(r11)
230 PPC_STL r12, VCPU_GPR(R12)(r11)
231 PPC_STL r7, VCPU_CTR(r11)
233 kvm_handler_common \intno, \srr0, \flags
236 .macro kvm_lvl_handler intno scratch srr0, srr1, flags
237 _GLOBAL(kvmppc_handler_\intno\()_\srr1)
238 mfspr r10, SPRN_SPRG_THREAD
240 PPC_STL r3, VCPU_GPR(R3)(r11)
242 PPC_STL r4, VCPU_GPR(R4)(r11)
244 PPC_STL r5, VCPU_GPR(R5)(r11)
247 PPC_STL r3, VCPU_GPR(R8)(r11)
249 PPC_STL r6, VCPU_GPR(R6)(r11)
250 PPC_STL r4, VCPU_GPR(R9)(r11)
253 PPC_STL r7, VCPU_GPR(R7)(r11)
254 PPC_STL r3, VCPU_GPR(R10)(r11)
256 PPC_STL r12, VCPU_GPR(R12)(r11)
257 PPC_STL r13, VCPU_GPR(R13)(r11)
258 PPC_STL r4, VCPU_GPR(R11)(r11)
259 PPC_STL r7, VCPU_CTR(r11)
261 kvm_handler_common \intno, \srr0, \flags
264 kvm_lvl_handler BOOKE_INTERRUPT_CRITICAL, \
265 SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
266 kvm_lvl_handler BOOKE_INTERRUPT_MACHINE_CHECK, \
267 SPRN_SPRG_RSCRATCH_MC, SPRN_MCSRR0, SPRN_MCSRR1, 0
268 kvm_handler BOOKE_INTERRUPT_DATA_STORAGE, \
269 SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR)
270 kvm_handler BOOKE_INTERRUPT_INST_STORAGE, SPRN_SRR0, SPRN_SRR1, NEED_ESR
271 kvm_handler BOOKE_INTERRUPT_EXTERNAL, SPRN_SRR0, SPRN_SRR1, 0
272 kvm_handler BOOKE_INTERRUPT_ALIGNMENT, \
273 SPRN_SRR0, SPRN_SRR1, (NEED_DEAR | NEED_ESR)
274 kvm_handler BOOKE_INTERRUPT_PROGRAM, SPRN_SRR0, SPRN_SRR1, NEED_ESR
275 kvm_handler BOOKE_INTERRUPT_FP_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
276 kvm_handler BOOKE_INTERRUPT_SYSCALL, SPRN_SRR0, SPRN_SRR1, 0
277 kvm_handler BOOKE_INTERRUPT_AP_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
278 kvm_handler BOOKE_INTERRUPT_DECREMENTER, SPRN_SRR0, SPRN_SRR1, 0
279 kvm_handler BOOKE_INTERRUPT_FIT, SPRN_SRR0, SPRN_SRR1, 0
280 kvm_lvl_handler BOOKE_INTERRUPT_WATCHDOG, \
281 SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
282 kvm_handler BOOKE_INTERRUPT_DTLB_MISS, \
283 SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR | NEED_ESR)
284 kvm_handler BOOKE_INTERRUPT_ITLB_MISS, SPRN_SRR0, SPRN_SRR1, 0
285 kvm_handler BOOKE_INTERRUPT_SPE_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
286 kvm_handler BOOKE_INTERRUPT_SPE_FP_DATA, SPRN_SRR0, SPRN_SRR1, 0
287 kvm_handler BOOKE_INTERRUPT_SPE_FP_ROUND, SPRN_SRR0, SPRN_SRR1, 0
288 kvm_handler BOOKE_INTERRUPT_PERFORMANCE_MONITOR, SPRN_SRR0, SPRN_SRR1, 0
289 kvm_handler BOOKE_INTERRUPT_DOORBELL, SPRN_SRR0, SPRN_SRR1, 0
290 kvm_lvl_handler BOOKE_INTERRUPT_DOORBELL_CRITICAL, \
291 SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
292 kvm_handler BOOKE_INTERRUPT_HV_PRIV, SPRN_SRR0, SPRN_SRR1, NEED_EMU
293 kvm_handler BOOKE_INTERRUPT_HV_SYSCALL, SPRN_SRR0, SPRN_SRR1, 0
294 kvm_handler BOOKE_INTERRUPT_GUEST_DBELL, SPRN_GSRR0, SPRN_GSRR1, 0
295 kvm_lvl_handler BOOKE_INTERRUPT_GUEST_DBELL_CRIT, \
296 SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
297 kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \
298 SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
299 kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \
300 SPRN_SPRG_RSCRATCH_DBG, SPRN_DSRR0, SPRN_DSRR1, 0
304 * SPRG_SCRATCH0: guest r10
306 * r11: vcpu->arch.shared
307 * r14: KVM exit number
309 _GLOBAL(kvmppc_resume_host)
310 /* Save remaining volatile guest register state to vcpu. */
311 mfspr r3, SPRN_VRSAVE
312 PPC_STL r0, VCPU_GPR(R0)(r4)
315 PPC_STL r5, VCPU_LR(r4)
317 stw r3, VCPU_VRSAVE(r4)
318 PPC_STD(r6, VCPU_SHARED_SPRG4, r11)
320 PPC_STD(r7, VCPU_SHARED_SPRG5, r11)
322 PPC_STD(r8, VCPU_SHARED_SPRG6, r11)
324 PPC_STD(r9, VCPU_SHARED_SPRG7, r11)
326 /* save guest MAS registers and restore host mas4 & mas6 */
328 PPC_STL r3, VCPU_XER(r4)
330 stw r5, VCPU_SHARED_MAS0(r11)
332 stw r6, VCPU_SHARED_MAS1(r11)
333 PPC_STD(r7, VCPU_SHARED_MAS2, r11)
336 stw r5, VCPU_SHARED_MAS7_3+4(r11)
338 stw r6, VCPU_SHARED_MAS4(r11)
340 lwz r6, VCPU_HOST_MAS4(r4)
341 stw r7, VCPU_SHARED_MAS6(r11)
342 lwz r8, VCPU_HOST_MAS6(r4)
344 stw r5, VCPU_SHARED_MAS7_3+0(r11)
346 /* Enable MAS register updates via exception */
348 rlwinm r3, r3, 0, ~SPRN_EPCR_DMIUH
352 /* Switch to kernel stack and jump to handler. */
353 PPC_LL r3, HOST_RUN(r1)
354 mr r5, r14 /* intno */
355 mr r14, r4 /* Save vcpu pointer. */
356 bl kvmppc_handle_exit
358 /* Restore vcpu pointer and the nonvolatiles we used. */
360 PPC_LL r14, VCPU_GPR(R14)(r4)
362 andi. r5, r3, RESUME_FLAG_NV
364 PPC_LL r15, VCPU_GPR(R15)(r4)
365 PPC_LL r16, VCPU_GPR(R16)(r4)
366 PPC_LL r17, VCPU_GPR(R17)(r4)
367 PPC_LL r18, VCPU_GPR(R18)(r4)
368 PPC_LL r19, VCPU_GPR(R19)(r4)
369 PPC_LL r20, VCPU_GPR(R20)(r4)
370 PPC_LL r21, VCPU_GPR(R21)(r4)
371 PPC_LL r22, VCPU_GPR(R22)(r4)
372 PPC_LL r23, VCPU_GPR(R23)(r4)
373 PPC_LL r24, VCPU_GPR(R24)(r4)
374 PPC_LL r25, VCPU_GPR(R25)(r4)
375 PPC_LL r26, VCPU_GPR(R26)(r4)
376 PPC_LL r27, VCPU_GPR(R27)(r4)
377 PPC_LL r28, VCPU_GPR(R28)(r4)
378 PPC_LL r29, VCPU_GPR(R29)(r4)
379 PPC_LL r30, VCPU_GPR(R30)(r4)
380 PPC_LL r31, VCPU_GPR(R31)(r4)
382 /* Should we return to the guest? */
383 andi. r5, r3, RESUME_FLAG_HOST
386 srawi r3, r3, 2 /* Shift -ERR back down. */
389 /* Not returning to guest. */
390 PPC_LL r5, HOST_STACK_LR(r1)
394 * We already saved guest volatile register state; now save the
398 PPC_STL r15, VCPU_GPR(R15)(r4)
399 PPC_STL r16, VCPU_GPR(R16)(r4)
400 PPC_STL r17, VCPU_GPR(R17)(r4)
401 PPC_STL r18, VCPU_GPR(R18)(r4)
402 PPC_STL r19, VCPU_GPR(R19)(r4)
403 PPC_STL r20, VCPU_GPR(R20)(r4)
404 PPC_STL r21, VCPU_GPR(R21)(r4)
405 PPC_STL r22, VCPU_GPR(R22)(r4)
406 PPC_STL r23, VCPU_GPR(R23)(r4)
407 PPC_STL r24, VCPU_GPR(R24)(r4)
408 PPC_STL r25, VCPU_GPR(R25)(r4)
409 PPC_STL r26, VCPU_GPR(R26)(r4)
410 PPC_STL r27, VCPU_GPR(R27)(r4)
411 PPC_STL r28, VCPU_GPR(R28)(r4)
412 PPC_STL r29, VCPU_GPR(R29)(r4)
413 PPC_STL r30, VCPU_GPR(R30)(r4)
414 PPC_STL r31, VCPU_GPR(R31)(r4)
416 /* Load host non-volatile register state from host stack. */
417 PPC_LL r14, HOST_NV_GPR(r14)(r1)
418 PPC_LL r15, HOST_NV_GPR(r15)(r1)
419 PPC_LL r16, HOST_NV_GPR(r16)(r1)
420 PPC_LL r17, HOST_NV_GPR(r17)(r1)
421 PPC_LL r18, HOST_NV_GPR(r18)(r1)
422 PPC_LL r19, HOST_NV_GPR(r19)(r1)
423 PPC_LL r20, HOST_NV_GPR(r20)(r1)
424 PPC_LL r21, HOST_NV_GPR(r21)(r1)
425 PPC_LL r22, HOST_NV_GPR(r22)(r1)
426 PPC_LL r23, HOST_NV_GPR(r23)(r1)
427 PPC_LL r24, HOST_NV_GPR(r24)(r1)
428 PPC_LL r25, HOST_NV_GPR(r25)(r1)
429 PPC_LL r26, HOST_NV_GPR(r26)(r1)
430 PPC_LL r27, HOST_NV_GPR(r27)(r1)
431 PPC_LL r28, HOST_NV_GPR(r28)(r1)
432 PPC_LL r29, HOST_NV_GPR(r29)(r1)
433 PPC_LL r30, HOST_NV_GPR(r30)(r1)
434 PPC_LL r31, HOST_NV_GPR(r31)(r1)
436 /* Return to kvm_vcpu_run(). */
439 addi r1, r1, HOST_STACK_SIZE
440 /* r3 still contains the return code from kvmppc_handle_exit(). */
444 * r3: kvm_run pointer
447 _GLOBAL(__kvmppc_vcpu_run)
448 stwu r1, -HOST_STACK_SIZE(r1)
449 PPC_STL r1, VCPU_HOST_STACK(r4) /* Save stack pointer to vcpu. */
451 /* Save host state to stack. */
452 PPC_STL r3, HOST_RUN(r1)
455 PPC_STL r3, HOST_STACK_LR(r1)
459 /* Save host non-volatile register state to stack. */
460 PPC_STL r14, HOST_NV_GPR(r14)(r1)
461 PPC_STL r15, HOST_NV_GPR(r15)(r1)
462 PPC_STL r16, HOST_NV_GPR(r16)(r1)
463 PPC_STL r17, HOST_NV_GPR(r17)(r1)
464 PPC_STL r18, HOST_NV_GPR(r18)(r1)
465 PPC_STL r19, HOST_NV_GPR(r19)(r1)
466 PPC_STL r20, HOST_NV_GPR(r20)(r1)
467 PPC_STL r21, HOST_NV_GPR(r21)(r1)
468 PPC_STL r22, HOST_NV_GPR(r22)(r1)
469 PPC_STL r23, HOST_NV_GPR(r23)(r1)
470 PPC_STL r24, HOST_NV_GPR(r24)(r1)
471 PPC_STL r25, HOST_NV_GPR(r25)(r1)
472 PPC_STL r26, HOST_NV_GPR(r26)(r1)
473 PPC_STL r27, HOST_NV_GPR(r27)(r1)
474 PPC_STL r28, HOST_NV_GPR(r28)(r1)
475 PPC_STL r29, HOST_NV_GPR(r29)(r1)
476 PPC_STL r30, HOST_NV_GPR(r30)(r1)
477 PPC_STL r31, HOST_NV_GPR(r31)(r1)
479 /* Load guest non-volatiles. */
480 PPC_LL r14, VCPU_GPR(R14)(r4)
481 PPC_LL r15, VCPU_GPR(R15)(r4)
482 PPC_LL r16, VCPU_GPR(R16)(r4)
483 PPC_LL r17, VCPU_GPR(R17)(r4)
484 PPC_LL r18, VCPU_GPR(R18)(r4)
485 PPC_LL r19, VCPU_GPR(R19)(r4)
486 PPC_LL r20, VCPU_GPR(R20)(r4)
487 PPC_LL r21, VCPU_GPR(R21)(r4)
488 PPC_LL r22, VCPU_GPR(R22)(r4)
489 PPC_LL r23, VCPU_GPR(R23)(r4)
490 PPC_LL r24, VCPU_GPR(R24)(r4)
491 PPC_LL r25, VCPU_GPR(R25)(r4)
492 PPC_LL r26, VCPU_GPR(R26)(r4)
493 PPC_LL r27, VCPU_GPR(R27)(r4)
494 PPC_LL r28, VCPU_GPR(R28)(r4)
495 PPC_LL r29, VCPU_GPR(R29)(r4)
496 PPC_LL r30, VCPU_GPR(R30)(r4)
497 PPC_LL r31, VCPU_GPR(R31)(r4)
501 PPC_STL r2, HOST_R2(r1)
504 stw r3, VCPU_HOST_PID(r4)
505 lwz r3, VCPU_GUEST_PID(r4)
508 PPC_LL r11, VCPU_SHARED(r4)
509 /* Disable MAS register updates via exception */
511 oris r3, r3, SPRN_EPCR_DMIUH@h
514 /* Save host mas4 and mas6 and load guest MAS registers */
516 stw r3, VCPU_HOST_MAS4(r4)
518 stw r3, VCPU_HOST_MAS6(r4)
519 lwz r3, VCPU_SHARED_MAS0(r11)
520 lwz r5, VCPU_SHARED_MAS1(r11)
521 PPC_LD(r6, VCPU_SHARED_MAS2, r11)
522 lwz r7, VCPU_SHARED_MAS7_3+4(r11)
523 lwz r8, VCPU_SHARED_MAS4(r11)
529 lwz r3, VCPU_SHARED_MAS6(r11)
530 lwz r5, VCPU_SHARED_MAS7_3+0(r11)
535 * Host interrupt handlers may have clobbered these guest-readable
536 * SPRGs, so we need to reload them here with the guest's values.
538 lwz r3, VCPU_VRSAVE(r4)
539 PPC_LD(r5, VCPU_SHARED_SPRG4, r11)
540 mtspr SPRN_VRSAVE, r3
541 PPC_LD(r6, VCPU_SHARED_SPRG5, r11)
542 mtspr SPRN_SPRG4W, r5
543 PPC_LD(r7, VCPU_SHARED_SPRG6, r11)
544 mtspr SPRN_SPRG5W, r6
545 PPC_LD(r8, VCPU_SHARED_SPRG7, r11)
546 mtspr SPRN_SPRG6W, r7
547 mtspr SPRN_SPRG7W, r8
549 /* Load some guest volatiles. */
550 PPC_LL r3, VCPU_LR(r4)
551 PPC_LL r5, VCPU_XER(r4)
552 PPC_LL r6, VCPU_CTR(r4)
554 PPC_LL r8, VCPU_PC(r4)
555 PPC_LD(r9, VCPU_SHARED_MSR, r11)
556 PPC_LL r0, VCPU_GPR(R0)(r4)
557 PPC_LL r1, VCPU_GPR(R1)(r4)
558 PPC_LL r2, VCPU_GPR(R2)(r4)
559 PPC_LL r10, VCPU_GPR(R10)(r4)
560 PPC_LL r11, VCPU_GPR(R11)(r4)
561 PPC_LL r12, VCPU_GPR(R12)(r4)
562 PPC_LL r13, VCPU_GPR(R13)(r4)
569 #ifdef CONFIG_KVM_EXIT_TIMING
570 /* save enter time */
576 stw r9, VCPU_TIMING_LAST_ENTER_TBL(r4)
578 stw r8, VCPU_TIMING_LAST_ENTER_TBU(r4)
582 * Don't execute any instruction which can change CR after
587 /* Finish loading guest volatiles and jump to guest. */
588 PPC_LL r5, VCPU_GPR(R5)(r4)
589 PPC_LL r6, VCPU_GPR(R6)(r4)
590 PPC_LL r7, VCPU_GPR(R7)(r4)
591 PPC_LL r8, VCPU_GPR(R8)(r4)
592 PPC_LL r9, VCPU_GPR(R9)(r4)
594 PPC_LL r3, VCPU_GPR(R3)(r4)
595 PPC_LL r4, VCPU_GPR(R4)(r4)