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KVM: VMX: Fix undefined beaviour of EPT after reload kvm-intel.ko
[deliverable/linux.git] / arch / ia64 / kvm / vmm_ivt.S
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fbd4b562
XZ		 1/*
2 * /ia64/kvm_ivt.S
3 *
4 * Copyright (C) 1998-2001, 2003 Hewlett-Packard Co
5 * Stephane Eranian <eranian@hpl.hp.com>
6 * David Mosberger <davidm@hpl.hp.com>
7 * Copyright (C) 2000, 2002-2003 Intel Co
8 * Asit Mallick <asit.k.mallick@intel.com>
9 * Suresh Siddha <suresh.b.siddha@intel.com>
10 * Kenneth Chen <kenneth.w.chen@intel.com>
11 * Fenghua Yu <fenghua.yu@intel.com>
12 *
13 *
14 * 00/08/23 Asit Mallick <asit.k.mallick@intel.com> TLB handling
15 * for SMP
16 * 00/12/20 David Mosberger-Tang <davidm@hpl.hp.com> DTLB/ITLB
17 * handler now uses virtual PT.
18 *
19 * 07/6/20 Xuefei Xu (Anthony Xu) (anthony.xu@intel.com)
20 * Supporting Intel virtualization architecture
21 *
22 */
23
24/*
25 * This file defines the interruption vector table used by the CPU.
26 * It does not include one entry per possible cause of interruption.
27 *
28 * The first 20 entries of the table contain 64 bundles each while the
29 * remaining 48 entries contain only 16 bundles each.
30 *
31 * The 64 bundles are used to allow inlining the whole handler for
32 * critical
33 * interruptions like TLB misses.
34 *
35 * For each entry, the comment is as follows:
36 *
37 * // 0x1c00 Entry 7 (size 64 bundles) Data Key Miss
38 * (12,51)
39 * entry offset ----/ / / /
40 * /
41 * entry number ---------/ / /
42 * /
43 * size of the entry -------------/ /
44 * /
45 * vector name -------------------------------------/
46 * /
47 * interruptions triggering this vector
48 * ----------------------/
49 *
50 * The table is 32KB in size and must be aligned on 32KB
51 * boundary.
52 * (The CPU ignores the 15 lower bits of the address)
53 *
54 * Table is based upon EAS2.6 (Oct 1999)
55 */
56
57
58#include <asm/asmmacro.h>
59#include <asm/cache.h>
60#include <asm/pgtable.h>
61
62#include "asm-offsets.h"
63#include "vcpu.h"
64#include "kvm_minstate.h"
65#include "vti.h"
66
67#if 1
68# define PSR_DEFAULT_BITS psr.ac
69#else
70# define PSR_DEFAULT_BITS 0
71#endif
72
73
74#define KVM_FAULT(n) \
75 kvm_fault_##n:; \
76 mov r19=n;; \
77 br.sptk.many kvm_fault_##n; \
78 ;; \
79
80
81#define KVM_REFLECT(n) \
82 mov r31=pr; \
83 mov r19=n; /* prepare to save predicates */ \
84 mov r29=cr.ipsr; \
85 ;; \
86 tbit.z p6,p7=r29,IA64_PSR_VM_BIT; \
87(p7)br.sptk.many kvm_dispatch_reflection; \
88 br.sptk.many kvm_panic; \
89
90
91GLOBAL_ENTRY(kvm_panic)
92 br.sptk.many kvm_panic
93 ;;
94END(kvm_panic)
95
96
97
98
99
100 .section .text.ivt,"ax"
101
102 .align 32768 // align on 32KB boundary
103 .global kvm_ia64_ivt
104kvm_ia64_ivt:
105///////////////////////////////////////////////////////////////
106// 0x0000 Entry 0 (size 64 bundles) VHPT Translation (8,20,47)
107ENTRY(kvm_vhpt_miss)
108 KVM_FAULT(0)
109END(kvm_vhpt_miss)
110
111
112 .org kvm_ia64_ivt+0x400
113////////////////////////////////////////////////////////////////
114// 0x0400 Entry 1 (size 64 bundles) ITLB (21)
115ENTRY(kvm_itlb_miss)
116 mov r31 = pr
117 mov r29=cr.ipsr;
118 ;;
119 tbit.z p6,p7=r29,IA64_PSR_VM_BIT;
120 (p6) br.sptk kvm_alt_itlb_miss
121 mov r19 = 1
122 br.sptk kvm_itlb_miss_dispatch
123 KVM_FAULT(1);
124END(kvm_itlb_miss)
125
126 .org kvm_ia64_ivt+0x0800
127//////////////////////////////////////////////////////////////////
128// 0x0800 Entry 2 (size 64 bundles) DTLB (9,48)
129ENTRY(kvm_dtlb_miss)
130 mov r31 = pr
131 mov r29=cr.ipsr;
132 ;;
133 tbit.z p6,p7=r29,IA64_PSR_VM_BIT;
134(p6)br.sptk kvm_alt_dtlb_miss
135 br.sptk kvm_dtlb_miss_dispatch
136END(kvm_dtlb_miss)
137
138 .org kvm_ia64_ivt+0x0c00
139////////////////////////////////////////////////////////////////////
140// 0x0c00 Entry 3 (size 64 bundles) Alt ITLB (19)
141ENTRY(kvm_alt_itlb_miss)
142 mov r16=cr.ifa // get address that caused the TLB miss
143 ;;
144 movl r17=PAGE_KERNEL
145 mov r24=cr.ipsr
146 movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
147 ;;
148 and r19=r19,r16 // clear ed, reserved bits, and PTE control bits
149 ;;
150 or r19=r17,r19 // insert PTE control bits into r19
151 ;;
152 movl r20=IA64_GRANULE_SHIFT<<2
153 ;;
154 mov cr.itir=r20
155 ;;
156 itc.i r19 // insert the TLB entry
157 mov pr=r31,-1
158 rfi
159END(kvm_alt_itlb_miss)
160
161 .org kvm_ia64_ivt+0x1000
162/////////////////////////////////////////////////////////////////////
163// 0x1000 Entry 4 (size 64 bundles) Alt DTLB (7,46)
164ENTRY(kvm_alt_dtlb_miss)
165 mov r16=cr.ifa // get address that caused the TLB miss
166 ;;
167 movl r17=PAGE_KERNEL
168 movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
169 mov r24=cr.ipsr
170 ;;
171 and r19=r19,r16 // clear ed, reserved bits, and PTE control bits
172 ;;
173 or r19=r19,r17 // insert PTE control bits into r19
174 ;;
175 movl r20=IA64_GRANULE_SHIFT<<2
176 ;;
177 mov cr.itir=r20
178 ;;
179 itc.d r19 // insert the TLB entry
180 mov pr=r31,-1
181 rfi
182END(kvm_alt_dtlb_miss)
183
184 .org kvm_ia64_ivt+0x1400
185//////////////////////////////////////////////////////////////////////
186// 0x1400 Entry 5 (size 64 bundles) Data nested TLB (6,45)
187ENTRY(kvm_nested_dtlb_miss)
188 KVM_FAULT(5)
189END(kvm_nested_dtlb_miss)
190
191 .org kvm_ia64_ivt+0x1800
192/////////////////////////////////////////////////////////////////////
193// 0x1800 Entry 6 (size 64 bundles) Instruction Key Miss (24)
194ENTRY(kvm_ikey_miss)
195 KVM_REFLECT(6)
196END(kvm_ikey_miss)
197
198 .org kvm_ia64_ivt+0x1c00
199/////////////////////////////////////////////////////////////////////
200// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
201ENTRY(kvm_dkey_miss)
202 KVM_REFLECT(7)
203END(kvm_dkey_miss)
204
205 .org kvm_ia64_ivt+0x2000
206////////////////////////////////////////////////////////////////////
207// 0x2000 Entry 8 (size 64 bundles) Dirty-bit (54)
208ENTRY(kvm_dirty_bit)
209 KVM_REFLECT(8)
210END(kvm_dirty_bit)
211
212 .org kvm_ia64_ivt+0x2400
213////////////////////////////////////////////////////////////////////
214// 0x2400 Entry 9 (size 64 bundles) Instruction Access-bit (27)
215ENTRY(kvm_iaccess_bit)
216 KVM_REFLECT(9)
217END(kvm_iaccess_bit)
218
219 .org kvm_ia64_ivt+0x2800
220///////////////////////////////////////////////////////////////////
221// 0x2800 Entry 10 (size 64 bundles) Data Access-bit (15,55)
222ENTRY(kvm_daccess_bit)
223 KVM_REFLECT(10)
224END(kvm_daccess_bit)
225
226 .org kvm_ia64_ivt+0x2c00
227/////////////////////////////////////////////////////////////////
228// 0x2c00 Entry 11 (size 64 bundles) Break instruction (33)
229ENTRY(kvm_break_fault)
230 mov r31=pr
231 mov r19=11
232 mov r29=cr.ipsr
233 ;;
234 KVM_SAVE_MIN_WITH_COVER_R19
235 ;;
236 alloc r14=ar.pfs,0,0,4,0 // now it's safe (must be first in insn group!)
237 mov out0=cr.ifa
238 mov out2=cr.isr // FIXME: pity to make this slow access twice
239 mov out3=cr.iim // FIXME: pity to make this slow access twice
240 adds r3=8,r2 // set up second base pointer
241 ;;
242 ssm psr.ic
243 ;;
244 srlz.i // guarantee that interruption collection is on
245 ;;
246 //(p15)ssm psr.i // restore psr.i
247 addl r14=@gprel(ia64_leave_hypervisor),gp
248 ;;
249 KVM_SAVE_REST
250 mov rp=r14
251 ;;
252 adds out1=16,sp
253 br.call.sptk.many b6=kvm_ia64_handle_break
254 ;;
255END(kvm_break_fault)
256
257 .org kvm_ia64_ivt+0x3000
258/////////////////////////////////////////////////////////////////
259// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)
260ENTRY(kvm_interrupt)
261 mov r31=pr // prepare to save predicates
262 mov r19=12
263 mov r29=cr.ipsr
264 ;;
265 tbit.z p6,p7=r29,IA64_PSR_VM_BIT
266 tbit.z p0,p15=r29,IA64_PSR_I_BIT
267 ;;
268(p7) br.sptk kvm_dispatch_interrupt
269 ;;
270 mov r27=ar.rsc /* M */
271 mov r20=r1 /* A */
272 mov r25=ar.unat /* M */
273 mov r26=ar.pfs /* I */
274 mov r28=cr.iip /* M */
275 cover /* B (or nothing) */
276 ;;
277 mov r1=sp
278 ;;
279 invala /* M */
280 mov r30=cr.ifs
281 ;;
282 addl r1=-VMM_PT_REGS_SIZE,r1
283 ;;
284 adds r17=2*L1_CACHE_BYTES,r1 /* really: biggest cache-line size */
285 adds r16=PT(CR_IPSR),r1
286 ;;
287 lfetch.fault.excl.nt1 [r17],L1_CACHE_BYTES
288 st8 [r16]=r29 /* save cr.ipsr */
289 ;;
290 lfetch.fault.excl.nt1 [r17]
291 mov r29=b0
292 ;;
293 adds r16=PT(R8),r1 /* initialize first base pointer */
294 adds r17=PT(R9),r1 /* initialize second base pointer */
295 mov r18=r0 /* make sure r18 isn't NaT */
296 ;;
297.mem.offset 0,0; st8.spill [r16]=r8,16
298.mem.offset 8,0; st8.spill [r17]=r9,16
299 ;;
300.mem.offset 0,0; st8.spill [r16]=r10,24
301.mem.offset 8,0; st8.spill [r17]=r11,24
302 ;;
303 st8 [r16]=r28,16 /* save cr.iip */
304 st8 [r17]=r30,16 /* save cr.ifs */
305 mov r8=ar.fpsr /* M */
306 mov r9=ar.csd
307 mov r10=ar.ssd
308 movl r11=FPSR_DEFAULT /* L-unit */
309 ;;
310 st8 [r16]=r25,16 /* save ar.unat */
311 st8 [r17]=r26,16 /* save ar.pfs */
312 shl r18=r18,16 /* compute ar.rsc to be used for "loadrs" */
313 ;;
314 st8 [r16]=r27,16 /* save ar.rsc */
315 adds r17=16,r17 /* skip over ar_rnat field */
316 ;;
317 st8 [r17]=r31,16 /* save predicates */
318 adds r16=16,r16 /* skip over ar_bspstore field */
319 ;;
320 st8 [r16]=r29,16 /* save b0 */
321 st8 [r17]=r18,16 /* save ar.rsc value for "loadrs" */
322 ;;
323.mem.offset 0,0; st8.spill [r16]=r20,16 /* save original r1 */
324.mem.offset 8,0; st8.spill [r17]=r12,16
325 adds r12=-16,r1
326 /* switch to kernel memory stack (with 16 bytes of scratch) */
327 ;;
328.mem.offset 0,0; st8.spill [r16]=r13,16
329.mem.offset 8,0; st8.spill [r17]=r8,16 /* save ar.fpsr */
330 ;;
331.mem.offset 0,0; st8.spill [r16]=r15,16
332.mem.offset 8,0; st8.spill [r17]=r14,16
333 dep r14=-1,r0,60,4
334 ;;
335.mem.offset 0,0; st8.spill [r16]=r2,16
336.mem.offset 8,0; st8.spill [r17]=r3,16
337 adds r2=VMM_PT_REGS_R16_OFFSET,r1
338 adds r14 = VMM_VCPU_GP_OFFSET,r13
339 ;;
340 mov r8=ar.ccv
341 ld8 r14 = [r14]
342 ;;
343 mov r1=r14 /* establish kernel global pointer */
344 ;; \
345 bsw.1
346 ;;
347 alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group
348 mov out0=r13
349 ;;
350 ssm psr.ic
351 ;;
352 srlz.i
353 ;;
354 //(p15) ssm psr.i
355 adds r3=8,r2 // set up second base pointer for SAVE_REST
356 srlz.i // ensure everybody knows psr.ic is back on
357 ;;
358.mem.offset 0,0; st8.spill [r2]=r16,16
359.mem.offset 8,0; st8.spill [r3]=r17,16
360 ;;
361.mem.offset 0,0; st8.spill [r2]=r18,16
362.mem.offset 8,0; st8.spill [r3]=r19,16
363 ;;
364.mem.offset 0,0; st8.spill [r2]=r20,16
365.mem.offset 8,0; st8.spill [r3]=r21,16
366 mov r18=b6
367 ;;
368.mem.offset 0,0; st8.spill [r2]=r22,16
369.mem.offset 8,0; st8.spill [r3]=r23,16
370 mov r19=b7
371 ;;
372.mem.offset 0,0; st8.spill [r2]=r24,16
373.mem.offset 8,0; st8.spill [r3]=r25,16
374 ;;
375.mem.offset 0,0; st8.spill [r2]=r26,16
376.mem.offset 8,0; st8.spill [r3]=r27,16
377 ;;
378.mem.offset 0,0; st8.spill [r2]=r28,16
379.mem.offset 8,0; st8.spill [r3]=r29,16
380 ;;
381.mem.offset 0,0; st8.spill [r2]=r30,16
382.mem.offset 8,0; st8.spill [r3]=r31,32
383 ;;
384 mov ar.fpsr=r11 /* M-unit */
385 st8 [r2]=r8,8 /* ar.ccv */
386 adds r24=PT(B6)-PT(F7),r3
387 ;;
388 stf.spill [r2]=f6,32
389 stf.spill [r3]=f7,32
390 ;;
391 stf.spill [r2]=f8,32
392 stf.spill [r3]=f9,32
393 ;;
394 stf.spill [r2]=f10
395 stf.spill [r3]=f11
396 adds r25=PT(B7)-PT(F11),r3
397 ;;
398 st8 [r24]=r18,16 /* b6 */
399 st8 [r25]=r19,16 /* b7 */
400 ;;
401 st8 [r24]=r9 /* ar.csd */
402 st8 [r25]=r10 /* ar.ssd */
403 ;;
404 srlz.d // make sure we see the effect of cr.ivr
405 addl r14=@gprel(ia64_leave_nested),gp
406 ;;
407 mov rp=r14
408 br.call.sptk.many b6=kvm_ia64_handle_irq
409 ;;
410END(kvm_interrupt)
411
412 .global kvm_dispatch_vexirq
413 .org kvm_ia64_ivt+0x3400
414//////////////////////////////////////////////////////////////////////
415// 0x3400 Entry 13 (size 64 bundles) Reserved
416ENTRY(kvm_virtual_exirq)
417 mov r31=pr
418 mov r19=13
419 mov r30 =r0
420 ;;
421kvm_dispatch_vexirq:
422 cmp.eq p6,p0 = 1,r30
423 ;;
424(p6)add r29 = VMM_VCPU_SAVED_GP_OFFSET,r21
425 ;;
426(p6)ld8 r1 = [r29]
427 ;;
428 KVM_SAVE_MIN_WITH_COVER_R19
429 alloc r14=ar.pfs,0,0,1,0
430 mov out0=r13
431
432 ssm psr.ic
433 ;;
434 srlz.i // guarantee that interruption collection is on
435 ;;
436 //(p15) ssm psr.i // restore psr.i
437 adds r3=8,r2 // set up second base pointer
438 ;;
439 KVM_SAVE_REST
440 addl r14=@gprel(ia64_leave_hypervisor),gp
441 ;;
442 mov rp=r14
443 br.call.sptk.many b6=kvm_vexirq
444END(kvm_virtual_exirq)
445
446 .org kvm_ia64_ivt+0x3800
447/////////////////////////////////////////////////////////////////////
448// 0x3800 Entry 14 (size 64 bundles) Reserved
449 KVM_FAULT(14)
450 // this code segment is from 2.6.16.13
451
452
453 .org kvm_ia64_ivt+0x3c00
454///////////////////////////////////////////////////////////////////////
455// 0x3c00 Entry 15 (size 64 bundles) Reserved
456 KVM_FAULT(15)
457
458
459 .org kvm_ia64_ivt+0x4000
460///////////////////////////////////////////////////////////////////////
461// 0x4000 Entry 16 (size 64 bundles) Reserved
462 KVM_FAULT(16)
463
464 .org kvm_ia64_ivt+0x4400
465//////////////////////////////////////////////////////////////////////
466// 0x4400 Entry 17 (size 64 bundles) Reserved
467 KVM_FAULT(17)
468
469 .org kvm_ia64_ivt+0x4800
470//////////////////////////////////////////////////////////////////////
471// 0x4800 Entry 18 (size 64 bundles) Reserved
472 KVM_FAULT(18)
473
474 .org kvm_ia64_ivt+0x4c00
475//////////////////////////////////////////////////////////////////////
476// 0x4c00 Entry 19 (size 64 bundles) Reserved
477 KVM_FAULT(19)
478
479 .org kvm_ia64_ivt+0x5000
480//////////////////////////////////////////////////////////////////////
481// 0x5000 Entry 20 (size 16 bundles) Page Not Present
482ENTRY(kvm_page_not_present)
483 KVM_REFLECT(20)
484END(kvm_page_not_present)
485
486 .org kvm_ia64_ivt+0x5100
487///////////////////////////////////////////////////////////////////////
488// 0x5100 Entry 21 (size 16 bundles) Key Permission vector
489ENTRY(kvm_key_permission)
490 KVM_REFLECT(21)
491END(kvm_key_permission)
492
493 .org kvm_ia64_ivt+0x5200
494//////////////////////////////////////////////////////////////////////
495// 0x5200 Entry 22 (size 16 bundles) Instruction Access Rights (26)
496ENTRY(kvm_iaccess_rights)
497 KVM_REFLECT(22)
498END(kvm_iaccess_rights)
499
500 .org kvm_ia64_ivt+0x5300
501//////////////////////////////////////////////////////////////////////
502// 0x5300 Entry 23 (size 16 bundles) Data Access Rights (14,53)
503ENTRY(kvm_daccess_rights)
504 KVM_REFLECT(23)
505END(kvm_daccess_rights)
506
507 .org kvm_ia64_ivt+0x5400
508/////////////////////////////////////////////////////////////////////
509// 0x5400 Entry 24 (size 16 bundles) General Exception (5,32,34,36,38,39)
510ENTRY(kvm_general_exception)
511 KVM_REFLECT(24)
512 KVM_FAULT(24)
513END(kvm_general_exception)
514
515 .org kvm_ia64_ivt+0x5500
516//////////////////////////////////////////////////////////////////////
517// 0x5500 Entry 25 (size 16 bundles) Disabled FP-Register (35)
518ENTRY(kvm_disabled_fp_reg)
519 KVM_REFLECT(25)
520END(kvm_disabled_fp_reg)
521
522 .org kvm_ia64_ivt+0x5600
523////////////////////////////////////////////////////////////////////
524// 0x5600 Entry 26 (size 16 bundles) Nat Consumption (11,23,37,50)
525ENTRY(kvm_nat_consumption)
526 KVM_REFLECT(26)
527END(kvm_nat_consumption)
528
529 .org kvm_ia64_ivt+0x5700
530/////////////////////////////////////////////////////////////////////
531// 0x5700 Entry 27 (size 16 bundles) Speculation (40)
532ENTRY(kvm_speculation_vector)
533 KVM_REFLECT(27)
534END(kvm_speculation_vector)
535
536 .org kvm_ia64_ivt+0x5800
537/////////////////////////////////////////////////////////////////////
538// 0x5800 Entry 28 (size 16 bundles) Reserved
539 KVM_FAULT(28)
540
541 .org kvm_ia64_ivt+0x5900
542///////////////////////////////////////////////////////////////////
543// 0x5900 Entry 29 (size 16 bundles) Debug (16,28,56)
544ENTRY(kvm_debug_vector)
545 KVM_FAULT(29)
546END(kvm_debug_vector)
547
548 .org kvm_ia64_ivt+0x5a00
549///////////////////////////////////////////////////////////////
550// 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57)
551ENTRY(kvm_unaligned_access)
552 KVM_REFLECT(30)
553END(kvm_unaligned_access)
554
555 .org kvm_ia64_ivt+0x5b00
556//////////////////////////////////////////////////////////////////////
557// 0x5b00 Entry 31 (size 16 bundles) Unsupported Data Reference (57)
558ENTRY(kvm_unsupported_data_reference)
559 KVM_REFLECT(31)
560END(kvm_unsupported_data_reference)
561
562 .org kvm_ia64_ivt+0x5c00
563////////////////////////////////////////////////////////////////////
564// 0x5c00 Entry 32 (size 16 bundles) Floating Point FAULT (65)
565ENTRY(kvm_floating_point_fault)
566 KVM_REFLECT(32)
567END(kvm_floating_point_fault)
568
569 .org kvm_ia64_ivt+0x5d00
570/////////////////////////////////////////////////////////////////////
571// 0x5d00 Entry 33 (size 16 bundles) Floating Point Trap (66)
572ENTRY(kvm_floating_point_trap)
573 KVM_REFLECT(33)
574END(kvm_floating_point_trap)
575
576 .org kvm_ia64_ivt+0x5e00
577//////////////////////////////////////////////////////////////////////
578// 0x5e00 Entry 34 (size 16 bundles) Lower Privilege Transfer Trap (66)
579ENTRY(kvm_lower_privilege_trap)
580 KVM_REFLECT(34)
581END(kvm_lower_privilege_trap)
582
583 .org kvm_ia64_ivt+0x5f00
584//////////////////////////////////////////////////////////////////////
585// 0x5f00 Entry 35 (size 16 bundles) Taken Branch Trap (68)
586ENTRY(kvm_taken_branch_trap)
587 KVM_REFLECT(35)
588END(kvm_taken_branch_trap)
589
590 .org kvm_ia64_ivt+0x6000
591////////////////////////////////////////////////////////////////////
592// 0x6000 Entry 36 (size 16 bundles) Single Step Trap (69)
593ENTRY(kvm_single_step_trap)
594 KVM_REFLECT(36)
595END(kvm_single_step_trap)
596 .global kvm_virtualization_fault_back
597 .org kvm_ia64_ivt+0x6100
598/////////////////////////////////////////////////////////////////////
599// 0x6100 Entry 37 (size 16 bundles) Virtualization Fault
600ENTRY(kvm_virtualization_fault)
601 mov r31=pr
602 adds r16 = VMM_VCPU_SAVED_GP_OFFSET,r21
603 ;;
604 st8 [r16] = r1
605 adds r17 = VMM_VCPU_GP_OFFSET, r21
606 ;;
607 ld8 r1 = [r17]
608 cmp.eq p6,p0=EVENT_MOV_FROM_AR,r24
609 cmp.eq p7,p0=EVENT_MOV_FROM_RR,r24
610 cmp.eq p8,p0=EVENT_MOV_TO_RR,r24
611 cmp.eq p9,p0=EVENT_RSM,r24
612 cmp.eq p10,p0=EVENT_SSM,r24
613 cmp.eq p11,p0=EVENT_MOV_TO_PSR,r24
614 cmp.eq p12,p0=EVENT_THASH,r24
615 (p6) br.dptk.many kvm_asm_mov_from_ar
616 (p7) br.dptk.many kvm_asm_mov_from_rr
617 (p8) br.dptk.many kvm_asm_mov_to_rr
618 (p9) br.dptk.many kvm_asm_rsm
619 (p10) br.dptk.many kvm_asm_ssm
620 (p11) br.dptk.many kvm_asm_mov_to_psr
621 (p12) br.dptk.many kvm_asm_thash
622 ;;
623kvm_virtualization_fault_back:
624 adds r16 = VMM_VCPU_SAVED_GP_OFFSET,r21
625 ;;
626 ld8 r1 = [r16]
627 ;;
628 mov r19=37
629 adds r16 = VMM_VCPU_CAUSE_OFFSET,r21
630 adds r17 = VMM_VCPU_OPCODE_OFFSET,r21
631 ;;
632 st8 [r16] = r24
633 st8 [r17] = r25
634 ;;
635 cmp.ne p6,p0=EVENT_RFI, r24
636 (p6) br.sptk kvm_dispatch_virtualization_fault
637 ;;
638 adds r18=VMM_VPD_BASE_OFFSET,r21
639 ;;
640 ld8 r18=[r18]
641 ;;
642 adds r18=VMM_VPD_VIFS_OFFSET,r18
643 ;;
644 ld8 r18=[r18]
645 ;;
646 tbit.z p6,p0=r18,63
647 (p6) br.sptk kvm_dispatch_virtualization_fault
648 ;;
649 //if vifs.v=1 desert current register frame
650 alloc r18=ar.pfs,0,0,0,0
651 br.sptk kvm_dispatch_virtualization_fault
652END(kvm_virtualization_fault)
653
654 .org kvm_ia64_ivt+0x6200
655//////////////////////////////////////////////////////////////
656// 0x6200 Entry 38 (size 16 bundles) Reserved
657 KVM_FAULT(38)
658
659 .org kvm_ia64_ivt+0x6300
660/////////////////////////////////////////////////////////////////
661// 0x6300 Entry 39 (size 16 bundles) Reserved
662 KVM_FAULT(39)
663
664 .org kvm_ia64_ivt+0x6400
665/////////////////////////////////////////////////////////////////
666// 0x6400 Entry 40 (size 16 bundles) Reserved
667 KVM_FAULT(40)
668
669 .org kvm_ia64_ivt+0x6500
670//////////////////////////////////////////////////////////////////
671// 0x6500 Entry 41 (size 16 bundles) Reserved
672 KVM_FAULT(41)
673
674 .org kvm_ia64_ivt+0x6600
675//////////////////////////////////////////////////////////////////
676// 0x6600 Entry 42 (size 16 bundles) Reserved
677 KVM_FAULT(42)
678
679 .org kvm_ia64_ivt+0x6700
680//////////////////////////////////////////////////////////////////
681// 0x6700 Entry 43 (size 16 bundles) Reserved
682 KVM_FAULT(43)
683
684 .org kvm_ia64_ivt+0x6800
685//////////////////////////////////////////////////////////////////
686// 0x6800 Entry 44 (size 16 bundles) Reserved
687 KVM_FAULT(44)
688
689 .org kvm_ia64_ivt+0x6900
690///////////////////////////////////////////////////////////////////
691// 0x6900 Entry 45 (size 16 bundles) IA-32 Exeception
692//(17,18,29,41,42,43,44,58,60,61,62,72,73,75,76,77)
693ENTRY(kvm_ia32_exception)
694 KVM_FAULT(45)
695END(kvm_ia32_exception)
696
697 .org kvm_ia64_ivt+0x6a00
698////////////////////////////////////////////////////////////////////
699// 0x6a00 Entry 46 (size 16 bundles) IA-32 Intercept (30,31,59,70,71)
700ENTRY(kvm_ia32_intercept)
701 KVM_FAULT(47)
702END(kvm_ia32_intercept)
703
704 .org kvm_ia64_ivt+0x6c00
705/////////////////////////////////////////////////////////////////////
706// 0x6c00 Entry 48 (size 16 bundles) Reserved
707 KVM_FAULT(48)
708
709 .org kvm_ia64_ivt+0x6d00
710//////////////////////////////////////////////////////////////////////
711// 0x6d00 Entry 49 (size 16 bundles) Reserved
712 KVM_FAULT(49)
713
714 .org kvm_ia64_ivt+0x6e00
715//////////////////////////////////////////////////////////////////////
716// 0x6e00 Entry 50 (size 16 bundles) Reserved
717 KVM_FAULT(50)
718
719 .org kvm_ia64_ivt+0x6f00
720/////////////////////////////////////////////////////////////////////
721// 0x6f00 Entry 51 (size 16 bundles) Reserved
722 KVM_FAULT(52)
723
724 .org kvm_ia64_ivt+0x7100
725////////////////////////////////////////////////////////////////////
726// 0x7100 Entry 53 (size 16 bundles) Reserved
727 KVM_FAULT(53)
728
729 .org kvm_ia64_ivt+0x7200
730/////////////////////////////////////////////////////////////////////
731// 0x7200 Entry 54 (size 16 bundles) Reserved
732 KVM_FAULT(54)
733
734 .org kvm_ia64_ivt+0x7300
735////////////////////////////////////////////////////////////////////
736// 0x7300 Entry 55 (size 16 bundles) Reserved
737 KVM_FAULT(55)
738
739 .org kvm_ia64_ivt+0x7400
740////////////////////////////////////////////////////////////////////
741// 0x7400 Entry 56 (size 16 bundles) Reserved
742 KVM_FAULT(56)
743
744 .org kvm_ia64_ivt+0x7500
745/////////////////////////////////////////////////////////////////////
746// 0x7500 Entry 57 (size 16 bundles) Reserved
747 KVM_FAULT(57)
748
749 .org kvm_ia64_ivt+0x7600
750/////////////////////////////////////////////////////////////////////
751// 0x7600 Entry 58 (size 16 bundles) Reserved
752 KVM_FAULT(58)
753
754 .org kvm_ia64_ivt+0x7700
755////////////////////////////////////////////////////////////////////
756// 0x7700 Entry 59 (size 16 bundles) Reserved
757 KVM_FAULT(59)
758
759 .org kvm_ia64_ivt+0x7800
760////////////////////////////////////////////////////////////////////
761// 0x7800 Entry 60 (size 16 bundles) Reserved
762 KVM_FAULT(60)
763
764 .org kvm_ia64_ivt+0x7900
765/////////////////////////////////////////////////////////////////////
766// 0x7900 Entry 61 (size 16 bundles) Reserved
767 KVM_FAULT(61)
768
769 .org kvm_ia64_ivt+0x7a00
770/////////////////////////////////////////////////////////////////////
771// 0x7a00 Entry 62 (size 16 bundles) Reserved
772 KVM_FAULT(62)
773
774 .org kvm_ia64_ivt+0x7b00
775/////////////////////////////////////////////////////////////////////
776// 0x7b00 Entry 63 (size 16 bundles) Reserved
777 KVM_FAULT(63)
778
779 .org kvm_ia64_ivt+0x7c00
780////////////////////////////////////////////////////////////////////
781// 0x7c00 Entry 64 (size 16 bundles) Reserved
782 KVM_FAULT(64)
783
784 .org kvm_ia64_ivt+0x7d00
785/////////////////////////////////////////////////////////////////////
786// 0x7d00 Entry 65 (size 16 bundles) Reserved
787 KVM_FAULT(65)
788
789 .org kvm_ia64_ivt+0x7e00
790/////////////////////////////////////////////////////////////////////
791// 0x7e00 Entry 66 (size 16 bundles) Reserved
792 KVM_FAULT(66)
793
794 .org kvm_ia64_ivt+0x7f00
795////////////////////////////////////////////////////////////////////
796// 0x7f00 Entry 67 (size 16 bundles) Reserved
797 KVM_FAULT(67)
798
799 .org kvm_ia64_ivt+0x8000
800// There is no particular reason for this code to be here, other than that
801// there happens to be space here that would go unused otherwise. If this
802// fault ever gets "unreserved", simply moved the following code to a more
803// suitable spot...
804
805
806ENTRY(kvm_dtlb_miss_dispatch)
807 mov r19 = 2
808 KVM_SAVE_MIN_WITH_COVER_R19
809 alloc r14=ar.pfs,0,0,3,0
810 mov out0=cr.ifa
811 mov out1=r15
812 adds r3=8,r2 // set up second base pointer
813 ;;
814 ssm psr.ic
815 ;;
816 srlz.i // guarantee that interruption collection is on
817 ;;
818 //(p15) ssm psr.i // restore psr.i
819 addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
820 ;;
821 KVM_SAVE_REST
822 KVM_SAVE_EXTRA
823 mov rp=r14
824 ;;
825 adds out2=16,r12
826 br.call.sptk.many b6=kvm_page_fault
827END(kvm_dtlb_miss_dispatch)
828
829ENTRY(kvm_itlb_miss_dispatch)
830
831 KVM_SAVE_MIN_WITH_COVER_R19
832 alloc r14=ar.pfs,0,0,3,0
833 mov out0=cr.ifa
834 mov out1=r15
835 adds r3=8,r2 // set up second base pointer
836 ;;
837 ssm psr.ic
838 ;;
839 srlz.i // guarantee that interruption collection is on
840 ;;
841 //(p15) ssm psr.i // restore psr.i
842 addl r14=@gprel(ia64_leave_hypervisor),gp
843 ;;
844 KVM_SAVE_REST
845 mov rp=r14
846 ;;
847 adds out2=16,r12
848 br.call.sptk.many b6=kvm_page_fault
849END(kvm_itlb_miss_dispatch)
850
851ENTRY(kvm_dispatch_reflection)
852 /*
853 * Input:
854 * psr.ic: off
855 * r19: intr type (offset into ivt, see ia64_int.h)
856 * r31: contains saved predicates (pr)
857 */
858 KVM_SAVE_MIN_WITH_COVER_R19
859 alloc r14=ar.pfs,0,0,5,0
860 mov out0=cr.ifa
861 mov out1=cr.isr
862 mov out2=cr.iim
863 mov out3=r15
864 adds r3=8,r2 // set up second base pointer
865 ;;
866 ssm psr.ic
867 ;;
868 srlz.i // guarantee that interruption collection is on
869 ;;
870 //(p15) ssm psr.i // restore psr.i
871 addl r14=@gprel(ia64_leave_hypervisor),gp
872 ;;
873 KVM_SAVE_REST
874 mov rp=r14
875 ;;
876 adds out4=16,r12
877 br.call.sptk.many b6=reflect_interruption
878END(kvm_dispatch_reflection)
879
880ENTRY(kvm_dispatch_virtualization_fault)
881 adds r16 = VMM_VCPU_CAUSE_OFFSET,r21
882 adds r17 = VMM_VCPU_OPCODE_OFFSET,r21
883 ;;
884 st8 [r16] = r24
885 st8 [r17] = r25
886 ;;
887 KVM_SAVE_MIN_WITH_COVER_R19
888 ;;
889 alloc r14=ar.pfs,0,0,2,0 // now it's safe (must be first in insn group!)
890 mov out0=r13 //vcpu
891 adds r3=8,r2 // set up second base pointer
892 ;;
893 ssm psr.ic
894 ;;
895 srlz.i // guarantee that interruption collection is on
896 ;;
897 //(p15) ssm psr.i // restore psr.i
898 addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
899 ;;
900 KVM_SAVE_REST
901 KVM_SAVE_EXTRA
902 mov rp=r14
903 ;;
904 adds out1=16,sp //regs
905 br.call.sptk.many b6=kvm_emulate
906END(kvm_dispatch_virtualization_fault)
907
908
909ENTRY(kvm_dispatch_interrupt)
910 KVM_SAVE_MIN_WITH_COVER_R19 // uses r31; defines r2 and r3
911 ;;
912 alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group
913 //mov out0=cr.ivr // pass cr.ivr as first arg
914 adds r3=8,r2 // set up second base pointer for SAVE_REST
915 ;;
916 ssm psr.ic
917 ;;
918 srlz.i
919 ;;
920 //(p15) ssm psr.i
921 addl r14=@gprel(ia64_leave_hypervisor),gp
922 ;;
923 KVM_SAVE_REST
924 mov rp=r14
925 ;;
926 mov out0=r13 // pass pointer to pt_regs as second arg
927 br.call.sptk.many b6=kvm_ia64_handle_irq
928END(kvm_dispatch_interrupt)
929
930
931
932
933GLOBAL_ENTRY(ia64_leave_nested)
934 rsm psr.i
935 ;;
936 adds r21=PT(PR)+16,r12
937 ;;
938 lfetch [r21],PT(CR_IPSR)-PT(PR)
939 adds r2=PT(B6)+16,r12
940 adds r3=PT(R16)+16,r12
941 ;;
942 lfetch [r21]
943 ld8 r28=[r2],8 // load b6
944 adds r29=PT(R24)+16,r12
945
946 ld8.fill r16=[r3]
947 adds r3=PT(AR_CSD)-PT(R16),r3
948 adds r30=PT(AR_CCV)+16,r12
949 ;;
950 ld8.fill r24=[r29]
951 ld8 r15=[r30] // load ar.ccv
952 ;;
953 ld8 r29=[r2],16 // load b7
954 ld8 r30=[r3],16 // load ar.csd
955 ;;
956 ld8 r31=[r2],16 // load ar.ssd
957 ld8.fill r8=[r3],16
958 ;;
959 ld8.fill r9=[r2],16
960 ld8.fill r10=[r3],PT(R17)-PT(R10)
961 ;;
962 ld8.fill r11=[r2],PT(R18)-PT(R11)
963 ld8.fill r17=[r3],16
964 ;;
965 ld8.fill r18=[r2],16
966 ld8.fill r19=[r3],16
967 ;;
968 ld8.fill r20=[r2],16
969 ld8.fill r21=[r3],16
970 mov ar.csd=r30
971 mov ar.ssd=r31
972 ;;
973 rsm psr.i | psr.ic
974 // initiate turning off of interrupt and interruption collection
975 invala // invalidate ALAT
976 ;;
977 srlz.i
978 ;;
979 ld8.fill r22=[r2],24
980 ld8.fill r23=[r3],24
981 mov b6=r28
982 ;;
983 ld8.fill r25=[r2],16
984 ld8.fill r26=[r3],16
985 mov b7=r29
986 ;;
987 ld8.fill r27=[r2],16
988 ld8.fill r28=[r3],16
989 ;;
990 ld8.fill r29=[r2],16
991 ld8.fill r30=[r3],24
992 ;;
993 ld8.fill r31=[r2],PT(F9)-PT(R31)
994 adds r3=PT(F10)-PT(F6),r3
995 ;;
996 ldf.fill f9=[r2],PT(F6)-PT(F9)
997 ldf.fill f10=[r3],PT(F8)-PT(F10)
998 ;;
999 ldf.fill f6=[r2],PT(F7)-PT(F6)
1000 ;;
1001 ldf.fill f7=[r2],PT(F11)-PT(F7)
1002 ldf.fill f8=[r3],32
1003 ;;
1004 srlz.i // ensure interruption collection is off
1005 mov ar.ccv=r15
1006 ;;
1007 bsw.0 // switch back to bank 0 (no stop bit required beforehand...)
1008 ;;
1009 ldf.fill f11=[r2]
1010// mov r18=r13
1011// mov r21=r13
1012 adds r16=PT(CR_IPSR)+16,r12
1013 adds r17=PT(CR_IIP)+16,r12
1014 ;;
1015 ld8 r29=[r16],16 // load cr.ipsr
1016 ld8 r28=[r17],16 // load cr.iip
1017 ;;
1018 ld8 r30=[r16],16 // load cr.ifs
1019 ld8 r25=[r17],16 // load ar.unat
1020 ;;
1021 ld8 r26=[r16],16 // load ar.pfs
1022 ld8 r27=[r17],16 // load ar.rsc
1023 cmp.eq p9,p0=r0,r0
1024 // set p9 to indicate that we should restore cr.ifs
1025 ;;
1026 ld8 r24=[r16],16 // load ar.rnat (may be garbage)
1027 ld8 r23=[r17],16// load ar.bspstore (may be garbage)
1028 ;;
1029 ld8 r31=[r16],16 // load predicates
1030 ld8 r22=[r17],16 // load b0
1031 ;;
1032 ld8 r19=[r16],16 // load ar.rsc value for "loadrs"
1033 ld8.fill r1=[r17],16 // load r1
1034 ;;
1035 ld8.fill r12=[r16],16
1036 ld8.fill r13=[r17],16
1037 ;;
1038 ld8 r20=[r16],16 // ar.fpsr
1039 ld8.fill r15=[r17],16
1040 ;;
1041 ld8.fill r14=[r16],16
1042 ld8.fill r2=[r17]
1043 ;;
1044 ld8.fill r3=[r16]
1045 ;;
1046 mov r16=ar.bsp // get existing backing store pointer
1047 ;;
1048 mov b0=r22
1049 mov ar.pfs=r26
1050 mov cr.ifs=r30
1051 mov cr.ipsr=r29
1052 mov ar.fpsr=r20
1053 mov cr.iip=r28
1054 ;;
1055 mov ar.rsc=r27
1056 mov ar.unat=r25
1057 mov pr=r31,-1
1058 rfi
1059END(ia64_leave_nested)
1060
1061
1062
1063GLOBAL_ENTRY(ia64_leave_hypervisor_prepare)
1064 /*
1065 * work.need_resched etc. mustn't get changed
1066 *by this CPU before it returns to
1067 ;;
1068 * user- or fsys-mode, hence we disable interrupts early on:
1069 */
1070 adds r2 = PT(R4)+16,r12
1071 adds r3 = PT(R5)+16,r12
1072 adds r8 = PT(EML_UNAT)+16,r12
1073 ;;
1074 ld8 r8 = [r8]
1075 ;;
1076 mov ar.unat=r8
1077 ;;
1078 ld8.fill r4=[r2],16 //load r4
1079 ld8.fill r5=[r3],16 //load r5
1080 ;;
1081 ld8.fill r6=[r2] //load r6
1082 ld8.fill r7=[r3] //load r7
1083 ;;
1084END(ia64_leave_hypervisor_prepare)
1085//fall through
1086GLOBAL_ENTRY(ia64_leave_hypervisor)
1087 rsm psr.i
1088 ;;
1089 br.call.sptk.many b0=leave_hypervisor_tail
1090 ;;
1091 adds r20=PT(PR)+16,r12
1092 adds r8=PT(EML_UNAT)+16,r12
1093 ;;
1094 ld8 r8=[r8]
1095 ;;
1096 mov ar.unat=r8
1097 ;;
1098 lfetch [r20],PT(CR_IPSR)-PT(PR)
1099 adds r2 = PT(B6)+16,r12
1100 adds r3 = PT(B7)+16,r12
1101 ;;
1102 lfetch [r20]
1103 ;;
1104 ld8 r24=[r2],16 /* B6 */
1105 ld8 r25=[r3],16 /* B7 */
1106 ;;
1107 ld8 r26=[r2],16 /* ar_csd */
1108 ld8 r27=[r3],16 /* ar_ssd */
1109 mov b6 = r24
1110 ;;
1111 ld8.fill r8=[r2],16
1112 ld8.fill r9=[r3],16
1113 mov b7 = r25
1114 ;;
1115 mov ar.csd = r26
1116 mov ar.ssd = r27
1117 ;;
1118 ld8.fill r10=[r2],PT(R15)-PT(R10)
1119 ld8.fill r11=[r3],PT(R14)-PT(R11)
1120 ;;
1121 ld8.fill r15=[r2],PT(R16)-PT(R15)
1122 ld8.fill r14=[r3],PT(R17)-PT(R14)
1123 ;;
1124 ld8.fill r16=[r2],16
1125 ld8.fill r17=[r3],16
1126 ;;
1127 ld8.fill r18=[r2],16
1128 ld8.fill r19=[r3],16
1129 ;;
1130 ld8.fill r20=[r2],16
1131 ld8.fill r21=[r3],16
1132 ;;
1133 ld8.fill r22=[r2],16
1134 ld8.fill r23=[r3],16
1135 ;;
1136 ld8.fill r24=[r2],16
1137 ld8.fill r25=[r3],16
1138 ;;
1139 ld8.fill r26=[r2],16
1140 ld8.fill r27=[r3],16
1141 ;;
1142 ld8.fill r28=[r2],16
1143 ld8.fill r29=[r3],16
1144 ;;
1145 ld8.fill r30=[r2],PT(F6)-PT(R30)
1146 ld8.fill r31=[r3],PT(F7)-PT(R31)
1147 ;;
1148 rsm psr.i | psr.ic
1149 // initiate turning off of interrupt and interruption collection
1150 invala // invalidate ALAT
1151 ;;
1152 srlz.i // ensure interruption collection is off
1153 ;;
1154 bsw.0
1155 ;;
1156 adds r16 = PT(CR_IPSR)+16,r12
1157 adds r17 = PT(CR_IIP)+16,r12
1158 mov r21=r13 // get current
1159 ;;
1160 ld8 r31=[r16],16 // load cr.ipsr
1161 ld8 r30=[r17],16 // load cr.iip
1162 ;;
1163 ld8 r29=[r16],16 // load cr.ifs
1164 ld8 r28=[r17],16 // load ar.unat
1165 ;;
1166 ld8 r27=[r16],16 // load ar.pfs
1167 ld8 r26=[r17],16 // load ar.rsc
1168 ;;
1169 ld8 r25=[r16],16 // load ar.rnat
1170 ld8 r24=[r17],16 // load ar.bspstore
1171 ;;
1172 ld8 r23=[r16],16 // load predicates
1173 ld8 r22=[r17],16 // load b0
1174 ;;
1175 ld8 r20=[r16],16 // load ar.rsc value for "loadrs"
1176 ld8.fill r1=[r17],16 //load r1
1177 ;;
1178 ld8.fill r12=[r16],16 //load r12
1179 ld8.fill r13=[r17],PT(R2)-PT(R13) //load r13
1180 ;;
1181 ld8 r19=[r16],PT(R3)-PT(AR_FPSR) //load ar_fpsr
1182 ld8.fill r2=[r17],PT(AR_CCV)-PT(R2) //load r2
1183 ;;
1184 ld8.fill r3=[r16] //load r3
1185 ld8 r18=[r17] //load ar_ccv
1186 ;;
1187 mov ar.fpsr=r19
1188 mov ar.ccv=r18
1189 shr.u r18=r20,16
1190 ;;
1191kvm_rbs_switch:
1192 mov r19=96
1193
1194kvm_dont_preserve_current_frame:
1195/*
1196 * To prevent leaking bits between the hypervisor and guest domain,
1197 * we must clear the stacked registers in the "invalid" partition here.
1198 * 5 registers/cycle on McKinley).
1199 */
1200# define pRecurse p6
1201# define pReturn p7
1202# define Nregs 14
1203
1204 alloc loc0=ar.pfs,2,Nregs-2,2,0
1205 shr.u loc1=r18,9 // RNaTslots <= floor(dirtySize / (64*8))
1206 sub r19=r19,r18 // r19 = (physStackedSize + 8) - dirtySize
1207 ;;
1208 mov ar.rsc=r20 // load ar.rsc to be used for "loadrs"
1209 shladd in0=loc1,3,r19
1210 mov in1=0
1211 ;;
1212 TEXT_ALIGN(32)
1213kvm_rse_clear_invalid:
1214 alloc loc0=ar.pfs,2,Nregs-2,2,0
1215 cmp.lt pRecurse,p0=Nregs*8,in0
1216 // if more than Nregs regs left to clear, (re)curse
1217 add out0=-Nregs*8,in0
1218 add out1=1,in1 // increment recursion count
1219 mov loc1=0
1220 mov loc2=0
1221 ;;
1222 mov loc3=0
1223 mov loc4=0
1224 mov loc5=0
1225 mov loc6=0
1226 mov loc7=0
1227(pRecurse) br.call.dptk.few b0=kvm_rse_clear_invalid
1228 ;;
1229 mov loc8=0
1230 mov loc9=0
1231 cmp.ne pReturn,p0=r0,in1
1232 // if recursion count != 0, we need to do a br.ret
1233 mov loc10=0
1234 mov loc11=0
1235(pReturn) br.ret.dptk.many b0
1236
1237# undef pRecurse
1238# undef pReturn
1239
1240// loadrs has already been shifted
1241 alloc r16=ar.pfs,0,0,0,0 // drop current register frame
1242 ;;
1243 loadrs
1244 ;;
1245 mov ar.bspstore=r24
1246 ;;
1247 mov ar.unat=r28
1248 mov ar.rnat=r25
1249 mov ar.rsc=r26
1250 ;;
1251 mov cr.ipsr=r31
1252 mov cr.iip=r30
1253 mov cr.ifs=r29
1254 mov ar.pfs=r27
1255 adds r18=VMM_VPD_BASE_OFFSET,r21
1256 ;;
1257 ld8 r18=[r18] //vpd
1258 adds r17=VMM_VCPU_ISR_OFFSET,r21
1259 ;;
1260 ld8 r17=[r17]
1261 adds r19=VMM_VPD_VPSR_OFFSET,r18
1262 ;;
1263 ld8 r19=[r19] //vpsr
1264 adds r20=VMM_VCPU_VSA_BASE_OFFSET,r21
1265 ;;
1266 ld8 r20=[r20]
1267 ;;
1268//vsa_sync_write_start
1269 mov r25=r18
1270 adds r16= VMM_VCPU_GP_OFFSET,r21
1271 ;;
1272 ld8 r16= [r16] // Put gp in r24
1273 movl r24=@gprel(ia64_vmm_entry) // calculate return address
1274 ;;
1275 add r24=r24,r16
1276 ;;
1277 add r16=PAL_VPS_SYNC_WRITE,r20
1278 ;;
1279 mov b0=r16
1280 br.cond.sptk b0 // call the service
1281 ;;
1282END(ia64_leave_hypervisor)
1283// fall through
1284GLOBAL_ENTRY(ia64_vmm_entry)
1285/*
1286 * must be at bank 0
1287 * parameter:
1288 * r17:cr.isr
1289 * r18:vpd
1290 * r19:vpsr
1291 * r20:__vsa_base
1292 * r22:b0
1293 * r23:predicate
1294 */
1295 mov r24=r22
1296 mov r25=r18
1297 tbit.nz p1,p2 = r19,IA64_PSR_IC_BIT // p1=vpsr.ic
1298 ;;
1299 (p1) add r29=PAL_VPS_RESUME_NORMAL,r20
1300 (p1) br.sptk.many ia64_vmm_entry_out
1301 ;;
1302 tbit.nz p1,p2 = r17,IA64_ISR_IR_BIT //p1=cr.isr.ir
1303 ;;
1304 (p1) add r29=PAL_VPS_RESUME_NORMAL,r20
1305 (p2) add r29=PAL_VPS_RESUME_HANDLER,r20
1306 (p2) ld8 r26=[r25]
1307 ;;
1308ia64_vmm_entry_out:
1309 mov pr=r23,-2
1310 mov b0=r29
1311 ;;
1312 br.cond.sptk b0 // call pal service
1313END(ia64_vmm_entry)
1314
1315
1316
1317/*
1318 * extern u64 ia64_call_vsa(u64 proc, u64 arg1, u64 arg2,
1319 * u64 arg3, u64 arg4, u64 arg5,
1320 * u64 arg6, u64 arg7);
1321 *
1322 * XXX: The currently defined services use only 4 args at the max. The
1323 * rest are not consumed.
1324 */
1325GLOBAL_ENTRY(ia64_call_vsa)
1326 .regstk 4,4,0,0
1327
1328rpsave = loc0
1329pfssave = loc1
1330psrsave = loc2
1331entry = loc3
1332hostret = r24
1333
1334 alloc pfssave=ar.pfs,4,4,0,0
1335 mov rpsave=rp
1336 adds entry=VMM_VCPU_VSA_BASE_OFFSET, r13
1337 ;;
1338 ld8 entry=[entry]
13391: mov hostret=ip
1340 mov r25=in1 // copy arguments
1341 mov r26=in2
1342 mov r27=in3
1343 mov psrsave=psr
1344 ;;
1345 tbit.nz p6,p0=psrsave,14 // IA64_PSR_I
1346 tbit.nz p7,p0=psrsave,13 // IA64_PSR_IC
1347 ;;
1348 add hostret=2f-1b,hostret // calculate return address
1349 add entry=entry,in0
1350 ;;
1351 rsm psr.i | psr.ic
1352 ;;
1353 srlz.i
1354 mov b6=entry
1355 br.cond.sptk b6 // call the service
13562:
1357 // Architectural sequence for enabling interrupts if necessary
1358(p7) ssm psr.ic
1359 ;;
1360(p7) srlz.i
1361 ;;
1362//(p6) ssm psr.i
1363 ;;
1364 mov rp=rpsave
1365 mov ar.pfs=pfssave
1366 mov r8=r31
1367 ;;
1368 srlz.d
1369 br.ret.sptk rp
1370
1371END(ia64_call_vsa)
1372
1373#define INIT_BSPSTORE ((4<<30)-(12<<20)-0x100)
1374
1375GLOBAL_ENTRY(vmm_reset_entry)
1376 //set up ipsr, iip, vpd.vpsr, dcr
1377 // For IPSR: it/dt/rt=1, i/ic=1, si=1, vm/bn=1
1378 // For DCR: all bits 0
1379 adds r14=-VMM_PT_REGS_SIZE, r12
1380 ;;
1381 movl r6=0x501008826000 // IPSR dt/rt/it:1;i/ic:1, si:1, vm/bn:1
1382 movl r10=0x8000000000000000
1383 adds r16=PT(CR_IIP), r14
1384 adds r20=PT(R1), r14
1385 ;;
1386 rsm psr.ic | psr.i
1387 ;;
1388 srlz.i
1389 ;;
1390 bsw.0
1391 ;;
1392 mov r21 =r13
1393 ;;
1394 bsw.1
1395 ;;
1396 mov ar.rsc = 0
1397 ;;
1398 flushrs
1399 ;;
1400 mov ar.bspstore = 0
1401 // clear BSPSTORE
1402 ;;
1403 mov cr.ipsr=r6
1404 mov cr.ifs=r10
1405 ld8 r4 = [r16] // Set init iip for first run.
1406 ld8 r1 = [r20]
1407 ;;
1408 mov cr.iip=r4
1409 ;;
1410 adds r16=VMM_VPD_BASE_OFFSET,r13
1411 adds r20=VMM_VCPU_VSA_BASE_OFFSET,r13
1412 ;;
1413 ld8 r18=[r16]
1414 ld8 r20=[r20]
1415 ;;
1416 adds r19=VMM_VPD_VPSR_OFFSET,r18
1417 ;;
1418 ld8 r19=[r19]
1419 mov r17=r0
1420 mov r22=r0
1421 mov r23=r0
1422 br.cond.sptk ia64_vmm_entry
1423 br.ret.sptk b0
1424END(vmm_reset_entry)
Linux kernel - Deliverables
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