VirtualBox

source: vbox/trunk/src/VBox/VMM/include/CPUMInternal.mac@ 62489

Last change on this file since 62489 was 62478, checked in by vboxsync, 8 years ago

(C) 2016

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1; $Id: CPUMInternal.mac 62478 2016-07-22 18:29:06Z vboxsync $
2;; @file
3; CPUM - Internal header file (asm).
4;
5
6;
7; Copyright (C) 2006-2016 Oracle Corporation
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17
18%include "VBox/asmdefs.mac"
19%include "VBox/vmm/cpum.mac"
20
21;; Check sanity.
22%ifdef VBOX_WITH_KERNEL_USING_XMM
23 %ifndef IN_RING0
24 %error "What? We've got code assuming VBOX_WITH_KERNEL_USING_XMM is only defined in ring-0!"
25 %endif
26%endif
27
28;; For numeric expressions
29%ifdef RT_ARCH_AMD64
30 %define CPUM_IS_AMD64 1
31%else
32 %define CPUM_IS_AMD64 0
33%endif
34
35
36;;
37; CPU info
38struc CPUMINFO
39 .cMsrRanges resd 1 ; uint32_t
40 .fMsrMask resd 1 ; uint32_t
41 .cCpuIdLeaves resd 1 ; uint32_t
42 .iFirstExtCpuIdLeaf resd 1 ; uint32_t
43 .uPadding resd 1 ; uint32_t
44 .enmUnknownCpuIdMethod resd 1 ; CPUMUNKNOWNCPUID
45 .DefCpuId resb CPUMCPUID_size ; CPUMCPUID
46 .uScalableBusFreq resq 1 ; uint64_t
47 .paMsrRangesR0 RTR0PTR_RES 1 ; R0PTRTYPE(PCPUMMSRRANGE)
48 .paCpuIdLeavesR0 RTR0PTR_RES 1 ; R0PTRTYPE(PCPUMCPUIDLEAF)
49 .paMsrRangesR3 RTR3PTR_RES 1 ; R3PTRTYPE(PCPUMMSRRANGE)
50 .paCpuIdLeavesR3 RTR3PTR_RES 1 ; R3PTRTYPE(PCPUMCPUIDLEAF)
51 .paMsrRangesRC RTRCPTR_RES 1 ; RCPTRTYPE(PCPUMMSRRANGE)
52 .paCpuIdLeavesRC RTRCPTR_RES 1 ; RCPTRTYPE(PCPUMCPUIDLEAF)
53endstruc
54
55
56%define CPUM_USED_FPU_HOST RT_BIT(0)
57%define CPUM_USED_FPU_GUEST RT_BIT(10)
58%define CPUM_USED_FPU_SINCE_REM RT_BIT(1)
59%define CPUM_USED_MANUAL_XMM_RESTORE RT_BIT(2)
60%define CPUM_USE_SYSENTER RT_BIT(3)
61%define CPUM_USE_SYSCALL RT_BIT(4)
62%define CPUM_USE_DEBUG_REGS_HOST RT_BIT(5)
63%define CPUM_USED_DEBUG_REGS_HOST RT_BIT(6)
64%define CPUM_USE_DEBUG_REGS_HYPER RT_BIT(7)
65%define CPUM_USED_DEBUG_REGS_HYPER RT_BIT(8)
66%define CPUM_USED_DEBUG_REGS_GUEST RT_BIT(9)
67%define CPUM_SYNC_FPU_STATE RT_BIT(16)
68%define CPUM_SYNC_DEBUG_REGS_GUEST RT_BIT(17)
69%define CPUM_SYNC_DEBUG_REGS_HYPER RT_BIT(18)
70%define CPUM_USE_FFXSR_LEAKY RT_BIT(19)
71%define CPUM_USE_SUPPORTS_LONGMODE RT_BIT(20)
72
73%define CPUM_HANDLER_DS 1
74%define CPUM_HANDLER_ES 2
75%define CPUM_HANDLER_FS 3
76%define CPUM_HANDLER_GS 4
77%define CPUM_HANDLER_IRET 5
78%define CPUM_HANDLER_TYPEMASK 0ffh
79%define CPUM_HANDLER_CTXCORE_IN_EBP RT_BIT(31)
80
81
82struc CPUM
83 ;...
84 .offCPUMCPU0 resd 1
85 .fHostUseFlags resd 1
86
87 ; CR4 masks
88 .CR4.AndMask resd 1
89 .CR4.OrMask resd 1
90 ; entered rawmode?
91 .u8PortableCpuIdLevel resb 1
92 .fPendingRestore resb 1
93
94 alignb 8
95 .fXStateGuestMask resq 1
96 .fXStateHostMask resq 1
97
98 alignb 64
99 .HostFeatures resb 32
100 .GuestFeatures resb 32
101 .GuestInfo resb RTHCPTR_CB*4 + RTRCPTR_CB*2 + 4*12
102
103 ; Patch manager saved state compatability CPUID leaf arrays
104 .aGuestCpuIdPatmStd resb 16*6
105 .aGuestCpuIdPatmExt resb 16*10
106 .aGuestCpuIdPatmCentaur resb 16*4
107
108 alignb 8
109 .cMsrWrites resq 1
110 .cMsrWritesToIgnoredBits resq 1
111 .cMsrWritesRaiseGp resq 1
112 .cMsrWritesUnknown resq 1
113 .cMsrReads resq 1
114 .cMsrReadsRaiseGp resq 1
115 .cMsrReadsUnknown resq 1
116endstruc
117
118struc CPUMCPU
119 ;
120 ; Guest context state
121 ; (Identical to the .Hyper chunk below.)
122 ;
123 .Guest resq 0
124 .Guest.eax resq 1
125 .Guest.ecx resq 1
126 .Guest.edx resq 1
127 .Guest.ebx resq 1
128 .Guest.esp resq 1
129 .Guest.ebp resq 1
130 .Guest.esi resq 1
131 .Guest.edi resq 1
132 .Guest.r8 resq 1
133 .Guest.r9 resq 1
134 .Guest.r10 resq 1
135 .Guest.r11 resq 1
136 .Guest.r12 resq 1
137 .Guest.r13 resq 1
138 .Guest.r14 resq 1
139 .Guest.r15 resq 1
140 .Guest.es.Sel resw 1
141 .Guest.es.PaddingSel resw 1
142 .Guest.es.ValidSel resw 1
143 .Guest.es.fFlags resw 1
144 .Guest.es.u64Base resq 1
145 .Guest.es.u32Limit resd 1
146 .Guest.es.Attr resd 1
147 .Guest.cs.Sel resw 1
148 .Guest.cs.PaddingSel resw 1
149 .Guest.cs.ValidSel resw 1
150 .Guest.cs.fFlags resw 1
151 .Guest.cs.u64Base resq 1
152 .Guest.cs.u32Limit resd 1
153 .Guest.cs.Attr resd 1
154 .Guest.ss.Sel resw 1
155 .Guest.ss.PaddingSel resw 1
156 .Guest.ss.ValidSel resw 1
157 .Guest.ss.fFlags resw 1
158 .Guest.ss.u64Base resq 1
159 .Guest.ss.u32Limit resd 1
160 .Guest.ss.Attr resd 1
161 .Guest.ds.Sel resw 1
162 .Guest.ds.PaddingSel resw 1
163 .Guest.ds.ValidSel resw 1
164 .Guest.ds.fFlags resw 1
165 .Guest.ds.u64Base resq 1
166 .Guest.ds.u32Limit resd 1
167 .Guest.ds.Attr resd 1
168 .Guest.fs.Sel resw 1
169 .Guest.fs.PaddingSel resw 1
170 .Guest.fs.ValidSel resw 1
171 .Guest.fs.fFlags resw 1
172 .Guest.fs.u64Base resq 1
173 .Guest.fs.u32Limit resd 1
174 .Guest.fs.Attr resd 1
175 .Guest.gs.Sel resw 1
176 .Guest.gs.PaddingSel resw 1
177 .Guest.gs.ValidSel resw 1
178 .Guest.gs.fFlags resw 1
179 .Guest.gs.u64Base resq 1
180 .Guest.gs.u32Limit resd 1
181 .Guest.gs.Attr resd 1
182 .Guest.eip resq 1
183 .Guest.eflags resq 1
184 .Guest.cr0 resq 1
185 .Guest.cr2 resq 1
186 .Guest.cr3 resq 1
187 .Guest.cr4 resq 1
188 .Guest.dr resq 8
189 .Guest.gdtrPadding resw 3
190 .Guest.gdtr resw 0
191 .Guest.gdtr.cbGdt resw 1
192 .Guest.gdtr.pGdt resq 1
193 .Guest.idtrPadding resw 3
194 .Guest.idtr resw 0
195 .Guest.idtr.cbIdt resw 1
196 .Guest.idtr.pIdt resq 1
197 .Guest.ldtr.Sel resw 1
198 .Guest.ldtr.PaddingSel resw 1
199 .Guest.ldtr.ValidSel resw 1
200 .Guest.ldtr.fFlags resw 1
201 .Guest.ldtr.u64Base resq 1
202 .Guest.ldtr.u32Limit resd 1
203 .Guest.ldtr.Attr resd 1
204 .Guest.tr.Sel resw 1
205 .Guest.tr.PaddingSel resw 1
206 .Guest.tr.ValidSel resw 1
207 .Guest.tr.fFlags resw 1
208 .Guest.tr.u64Base resq 1
209 .Guest.tr.u32Limit resd 1
210 .Guest.tr.Attr resd 1
211 .Guest.SysEnter.cs resb 8
212 .Guest.SysEnter.eip resb 8
213 .Guest.SysEnter.esp resb 8
214 .Guest.msrEFER resb 8
215 .Guest.msrSTAR resb 8
216 .Guest.msrPAT resb 8
217 .Guest.msrLSTAR resb 8
218 .Guest.msrCSTAR resb 8
219 .Guest.msrSFMASK resb 8
220 .Guest.msrKERNELGSBASE resb 8
221 .Guest.msrApicBase resb 8
222 .Guest.aXcr resq 2
223 .Guest.fXStateMask resq 1
224 .Guest.pXStateR0 RTR0PTR_RES 1
225 .Guest.pXStateR3 RTR3PTR_RES 1
226 .Guest.pXStateRC RTRCPTR_RES 1
227 .Guest.aoffXState resw 64
228
229 alignb 64
230 .GuestMsrs resq 0
231 .GuestMsrs.au64 resq 64
232
233 ;
234 ; Other stuff.
235 ;
236 .fUseFlags resd 1
237 .fChanged resd 1
238 .offCPUM resd 1
239 .u32RetCode resd 1
240
241%ifdef VBOX_WITH_VMMR0_DISABLE_LAPIC_NMI
242 .pvApicBase RTR0PTR_RES 1
243 .fApicDisVectors resd 1
244 .fX2Apic resb 1
245%else
246 .abPadding3 resb (RTR0PTR_CB + 4 + 1)
247%endif
248
249 .fRawEntered resb 1
250 .fRemEntered resb 1
251 .fCpuIdApicFeatureVisible resb 1
252
253 .abPadding2 resb (64 - 16 - RTR0PTR_CB - 4 - 1 - 3)
254
255 ;
256 ; Host context state
257 ;
258 alignb 64
259 .Host resb 0
260%if HC_ARCH_BITS == 64
261 ;.Host.rax resq 1 - scratch
262 .Host.rbx resq 1
263 ;.Host.rcx resq 1 - scratch
264 ;.Host.rdx resq 1 - scratch
265 .Host.rdi resq 1
266 .Host.rsi resq 1
267 .Host.rbp resq 1
268 .Host.rsp resq 1
269 ;.Host.r8 resq 1 - scratch
270 ;.Host.r9 resq 1 - scratch
271 .Host.r10 resq 1
272 .Host.r11 resq 1
273 .Host.r12 resq 1
274 .Host.r13 resq 1
275 .Host.r14 resq 1
276 .Host.r15 resq 1
277 ;.Host.rip resd 1 - scratch
278 .Host.rflags resq 1
279%endif
280%if HC_ARCH_BITS == 32
281 ;.Host.eax resd 1 - scratch
282 .Host.ebx resd 1
283 ;.Host.edx resd 1 - scratch
284 ;.Host.ecx resd 1 - scratch
285 .Host.edi resd 1
286 .Host.esi resd 1
287 .Host.ebp resd 1
288 .Host.eflags resd 1
289 ;.Host.eip resd 1 - scratch
290 ; lss pair!
291 .Host.esp resd 1
292%endif
293 .Host.ss resw 1
294 .Host.ssPadding resw 1
295 .Host.gs resw 1
296 .Host.gsPadding resw 1
297 .Host.fs resw 1
298 .Host.fsPadding resw 1
299 .Host.es resw 1
300 .Host.esPadding resw 1
301 .Host.ds resw 1
302 .Host.dsPadding resw 1
303 .Host.cs resw 1
304 .Host.csPadding resw 1
305
306%if HC_ARCH_BITS == 32
307 .Host.cr0 resd 1
308 ;.Host.cr2 resd 1 - scratch
309 .Host.cr3 resd 1
310 .Host.cr4 resd 1
311 .Host.cr0Fpu resd 1
312
313 .Host.dr0 resd 1
314 .Host.dr1 resd 1
315 .Host.dr2 resd 1
316 .Host.dr3 resd 1
317 .Host.dr6 resd 1
318 .Host.dr7 resd 1
319
320 .Host.gdtr resb 6 ; GDT limit + linear address
321 .Host.gdtrPadding resw 1
322 .Host.idtr resb 6 ; IDT limit + linear address
323 .Host.idtrPadding resw 1
324 .Host.ldtr resw 1
325 .Host.ldtrPadding resw 1
326 .Host.tr resw 1
327 .Host.trPadding resw 1
328
329 alignb 8
330 .Host.SysEnter.cs resq 1
331 .Host.SysEnter.eip resq 1
332 .Host.SysEnter.esp resq 1
333 .Host.efer resq 1
334 .Host.auPadding resb (20)
335
336%else ; 64-bit
337
338 .Host.cr0Fpu:
339 .Host.cr0 resq 1
340 ;.Host.cr2 resq 1 - scratch
341 .Host.cr3 resq 1
342 .Host.cr4 resq 1
343 .Host.cr8 resq 1
344
345 .Host.dr0 resq 1
346 .Host.dr1 resq 1
347 .Host.dr2 resq 1
348 .Host.dr3 resq 1
349 .Host.dr6 resq 1
350 .Host.dr7 resq 1
351
352 .Host.gdtr resb 10 ; GDT limit + linear address
353 .Host.gdtrPadding resw 1
354 .Host.idtr resb 10 ; IDT limit + linear address
355 .Host.idtrPadding resw 1
356 .Host.ldtr resw 1
357 .Host.ldtrPadding resw 1
358 .Host.tr resw 1
359 .Host.trPadding resw 1
360
361 .Host.SysEnter.cs resq 1
362 .Host.SysEnter.eip resq 1
363 .Host.SysEnter.esp resq 1
364 .Host.FSbase resq 1
365 .Host.GSbase resq 1
366 .Host.efer resq 1
367 .Host.auPadding resb 4
368%endif ; 64-bit
369 .Host.pXStateRC RTRCPTR_RES 1
370 alignb RTR0PTR_CB
371 .Host.pXStateR0 RTR0PTR_RES 1
372 .Host.pXStateR3 RTR3PTR_RES 1
373 alignb 8
374 .Host.xcr0 resq 1
375 .Host.fXStateMask resq 1
376
377 ;
378 ; Hypervisor Context (same as .Guest above).
379 ;
380 alignb 64
381 .Hyper resq 0
382 .Hyper.eax resq 1
383 .Hyper.ecx resq 1
384 .Hyper.edx resq 1
385 .Hyper.ebx resq 1
386 .Hyper.esp resq 1
387 .Hyper.ebp resq 1
388 .Hyper.esi resq 1
389 .Hyper.edi resq 1
390 .Hyper.r8 resq 1
391 .Hyper.r9 resq 1
392 .Hyper.r10 resq 1
393 .Hyper.r11 resq 1
394 .Hyper.r12 resq 1
395 .Hyper.r13 resq 1
396 .Hyper.r14 resq 1
397 .Hyper.r15 resq 1
398 .Hyper.es.Sel resw 1
399 .Hyper.es.PaddingSel resw 1
400 .Hyper.es.ValidSel resw 1
401 .Hyper.es.fFlags resw 1
402 .Hyper.es.u64Base resq 1
403 .Hyper.es.u32Limit resd 1
404 .Hyper.es.Attr resd 1
405 .Hyper.cs.Sel resw 1
406 .Hyper.cs.PaddingSel resw 1
407 .Hyper.cs.ValidSel resw 1
408 .Hyper.cs.fFlags resw 1
409 .Hyper.cs.u64Base resq 1
410 .Hyper.cs.u32Limit resd 1
411 .Hyper.cs.Attr resd 1
412 .Hyper.ss.Sel resw 1
413 .Hyper.ss.PaddingSel resw 1
414 .Hyper.ss.ValidSel resw 1
415 .Hyper.ss.fFlags resw 1
416 .Hyper.ss.u64Base resq 1
417 .Hyper.ss.u32Limit resd 1
418 .Hyper.ss.Attr resd 1
419 .Hyper.ds.Sel resw 1
420 .Hyper.ds.PaddingSel resw 1
421 .Hyper.ds.ValidSel resw 1
422 .Hyper.ds.fFlags resw 1
423 .Hyper.ds.u64Base resq 1
424 .Hyper.ds.u32Limit resd 1
425 .Hyper.ds.Attr resd 1
426 .Hyper.fs.Sel resw 1
427 .Hyper.fs.PaddingSel resw 1
428 .Hyper.fs.ValidSel resw 1
429 .Hyper.fs.fFlags resw 1
430 .Hyper.fs.u64Base resq 1
431 .Hyper.fs.u32Limit resd 1
432 .Hyper.fs.Attr resd 1
433 .Hyper.gs.Sel resw 1
434 .Hyper.gs.PaddingSel resw 1
435 .Hyper.gs.ValidSel resw 1
436 .Hyper.gs.fFlags resw 1
437 .Hyper.gs.u64Base resq 1
438 .Hyper.gs.u32Limit resd 1
439 .Hyper.gs.Attr resd 1
440 .Hyper.eip resq 1
441 .Hyper.eflags resq 1
442 .Hyper.cr0 resq 1
443 .Hyper.cr2 resq 1
444 .Hyper.cr3 resq 1
445 .Hyper.cr4 resq 1
446 .Hyper.dr resq 8
447 .Hyper.gdtrPadding resw 3
448 .Hyper.gdtr resw 0
449 .Hyper.gdtr.cbGdt resw 1
450 .Hyper.gdtr.pGdt resq 1
451 .Hyper.idtrPadding resw 3
452 .Hyper.idtr resw 0
453 .Hyper.idtr.cbIdt resw 1
454 .Hyper.idtr.pIdt resq 1
455 .Hyper.ldtr.Sel resw 1
456 .Hyper.ldtr.PaddingSel resw 1
457 .Hyper.ldtr.ValidSel resw 1
458 .Hyper.ldtr.fFlags resw 1
459 .Hyper.ldtr.u64Base resq 1
460 .Hyper.ldtr.u32Limit resd 1
461 .Hyper.ldtr.Attr resd 1
462 .Hyper.tr.Sel resw 1
463 .Hyper.tr.PaddingSel resw 1
464 .Hyper.tr.ValidSel resw 1
465 .Hyper.tr.fFlags resw 1
466 .Hyper.tr.u64Base resq 1
467 .Hyper.tr.u32Limit resd 1
468 .Hyper.tr.Attr resd 1
469 .Hyper.SysEnter.cs resb 8
470 .Hyper.SysEnter.eip resb 8
471 .Hyper.SysEnter.esp resb 8
472 .Hyper.msrEFER resb 8
473 .Hyper.msrSTAR resb 8
474 .Hyper.msrPAT resb 8
475 .Hyper.msrLSTAR resb 8
476 .Hyper.msrCSTAR resb 8
477 .Hyper.msrSFMASK resb 8
478 .Hyper.msrKERNELGSBASE resb 8
479 .Hyper.msrApicBase resb 8
480 .Hyper.aXcr resq 2
481 .Hyper.fXStateMask resq 1
482 .Hyper.pXStateR0 RTR0PTR_RES 1
483 .Hyper.pXStateR3 RTR3PTR_RES 1
484 .Hyper.pXStateRC RTRCPTR_RES 1
485 .Hyper.aoffXState resw 64
486 alignb 64
487
488%ifdef VBOX_WITH_CRASHDUMP_MAGIC
489 .aMagic resb 56
490 .uMagic resq 1
491%endif
492endstruc
493
494
495;;
496; Converts the CPUM pointer to CPUMCPU
497; @param %1 register name
498%macro CPUMCPU_FROM_CPUM 1
499 add %1, dword [%1 + CPUM.offCPUMCPU0]
500%endmacro
501
502;;
503; Converts the CPUM pointer to CPUMCPU
504; @param %1 register name (CPUM)
505; @param %2 register name (CPUMCPU offset)
506%macro CPUMCPU_FROM_CPUM_WITH_OFFSET 2
507 add %1, %2
508%endmacro
509
510;;
511; Converts the CPUMCPU pointer to CPUM
512; @param %1 register name
513%macro CPUM_FROM_CPUMCPU 1
514 sub %1, dword [%1 + CPUMCPU.offCPUM]
515%endmacro
516
517;;
518; Converts the CPUMCPU pointer to CPUM
519; @param %1 register name (CPUM)
520; @param %2 register name (CPUMCPU offset)
521%macro CPUM_FROM_CPUMCPU_WITH_OFFSET 2
522 sub %1, %2
523%endmacro
524
525
526
527%if 0 ; Currently not used anywhere.
528;;
529; Macro for FXSAVE/FXRSTOR leaky behaviour on AMD CPUs, see cpumR3CheckLeakyFpu().
530;
531; Cleans the FPU state, if necessary, before restoring the FPU.
532;
533; This macro ASSUMES CR0.TS is not set!
534;
535; @param xDX Pointer to CPUMCPU.
536; @uses xAX, EFLAGS
537;
538; Changes here should also be reflected in CPUMRCA.asm's copy!
539;
540%macro CLEANFPU 0
541 test dword [xDX + CPUMCPU.fUseFlags], CPUM_USE_FFXSR_LEAKY
542 jz .nothing_to_clean
543
544 xor eax, eax
545 fnstsw ax ; FSW -> AX.
546 test eax, RT_BIT(7) ; If FSW.ES (bit 7) is set, clear it to not cause FPU exceptions
547 ; while clearing & loading the FPU bits in 'clean_fpu' below.
548 jz .clean_fpu
549 fnclex
550
551.clean_fpu:
552 ffree st7 ; Clear FPU stack register(7)'s tag entry to prevent overflow if a wraparound occurs.
553 ; for the upcoming push (load)
554 fild dword [g_r32_Zero xWrtRIP] ; Explicit FPU load to overwrite FIP, FOP, FDP registers in the FPU.
555.nothing_to_clean:
556%endmacro
557%endif ; Unused.
558
559
560;;
561; Makes sure we don't trap (#NM) accessing the FPU.
562;
563; In ring-0 this is a bit of work since we may have try convince the host kernel
564; to do the work for us, also, we must report any CR0 changes back to HMR0VMX
565; via the VINF_CPUM_HOST_CR0_MODIFIED status code.
566;
567; If we end up clearing CR0.TS/EM ourselves in ring-0, we'll save the original
568; value in CPUMCPU.Host.cr0Fpu. If we don't, we'll store zero there. (See also
569; CPUMRZ_RESTORE_CR0_IF_TS_OR_EM_SET.)
570;
571; In raw-mode we will always have to clear TS and it will be recalculated
572; elsewhere and thus needs no saving.
573;
574; @param %1 Register to return the return status code in.
575; @param %2 Temporary scratch register.
576; @param %3 Ring-0 only, register pointing to the CPUMCPU structure
577; of the EMT we're on.
578; @uses EFLAGS, CR0, %1, %2
579;
580%macro CPUMRZ_TOUCH_FPU_CLEAR_CR0_FPU_TRAPS_SET_RC 3
581 %ifdef IN_RC
582 ;
583 ; raw-mode - always clear it. We won't be here otherwise.
584 ;
585 mov %2, cr0
586 and %2, ~(X86_CR0_TS | X86_CR0_EM)
587 mov cr0, %2
588
589 %else
590 ;
591 ; ring-0 - slightly complicated.
592 ;
593 xor %1, %1 ; 0 / VINF_SUCCESS. Wishing for no CR0 changes.
594 mov [%3 + CPUMCPU.Host.cr0Fpu], %1
595
596 mov %2, cr0
597 test %2, X86_CR0_TS | X86_CR0_EM ; Make sure its safe to access the FPU state.
598 jz %%no_cr0_change
599
600 %ifdef VMM_R0_TOUCH_FPU
601 ; Touch the state and check that the kernel updated CR0 for us.
602 movdqa xmm0, xmm0
603 mov %2, cr0
604 test %2, X86_CR0_TS | X86_CR0_EM
605 jz %%cr0_changed
606 %endif
607
608 ; Save CR0 and clear them flags ourselves.
609 mov [%3 + CPUMCPU.Host.cr0Fpu], %2
610 and %2, ~(X86_CR0_TS | X86_CR0_EM)
611 mov cr0, %2
612 %endif ; IN_RING0
613
614%%cr0_changed:
615 mov %1, VINF_CPUM_HOST_CR0_MODIFIED
616%%no_cr0_change:
617%endmacro
618
619
620;;
621; Restore CR0 if CR0.TS or CR0.EM were non-zero in the original state.
622;
623; @param %1 The original state to restore (or zero).
624;
625%macro CPUMRZ_RESTORE_CR0_IF_TS_OR_EM_SET 1
626 test %1, X86_CR0_TS | X86_CR0_EM
627 jz %%skip_cr0_restore
628 mov cr0, %1
629%%skip_cr0_restore:
630%endmacro
631
632
633;;
634; Saves the host state.
635;
636; @uses rax, rdx
637; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
638; @param pXState Define for the register containing the extended state pointer.
639;
640%macro CPUMR0_SAVE_HOST 0
641 ;
642 ; Load a couple of registers we'll use later in all branches.
643 ;
644 %ifdef IN_RING0
645 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateR0]
646 %elifdef IN_RC
647 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateRC]
648 %else
649 %error "Unsupported context!"
650 %endif
651 mov eax, [pCpumCpu + CPUMCPU.Host.fXStateMask]
652
653 ;
654 ; XSAVE or FXSAVE?
655 ;
656 or eax, eax
657 jz %%host_fxsave
658
659 ; XSAVE
660 mov edx, [pCpumCpu + CPUMCPU.Host.fXStateMask + 4]
661 %ifdef RT_ARCH_AMD64
662 o64 xsave [pXState]
663 %else
664 xsave [pXState]
665 %endif
666 jmp %%host_done
667
668 ; FXSAVE
669%%host_fxsave:
670 %ifdef RT_ARCH_AMD64
671 o64 fxsave [pXState] ; Use explicit REX prefix. See @bugref{6398}.
672 %else
673 fxsave [pXState]
674 %endif
675
676%%host_done:
677%endmacro ; CPUMR0_SAVE_HOST
678
679
680;;
681; Loads the host state.
682;
683; @uses rax, rdx
684; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
685; @param pXState Define for the register containing the extended state pointer.
686;
687%macro CPUMR0_LOAD_HOST 0
688 ;
689 ; Load a couple of registers we'll use later in all branches.
690 ;
691 %ifdef IN_RING0
692 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateR0]
693 %elifdef IN_RC
694 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateRC]
695 %else
696 %error "Unsupported context!"
697 %endif
698 mov eax, [pCpumCpu + CPUMCPU.Host.fXStateMask]
699
700 ;
701 ; XRSTOR or FXRSTOR?
702 ;
703 or eax, eax
704 jz %%host_fxrstor
705
706 ; XRSTOR
707 mov edx, [pCpumCpu + CPUMCPU.Host.fXStateMask + 4]
708 %ifdef RT_ARCH_AMD64
709 o64 xrstor [pXState]
710 %else
711 xrstor [pXState]
712 %endif
713 jmp %%host_done
714
715 ; FXRSTOR
716%%host_fxrstor:
717 %ifdef RT_ARCH_AMD64
718 o64 fxrstor [pXState] ; Use explicit REX prefix. See @bugref{6398}.
719 %else
720 fxrstor [pXState]
721 %endif
722
723%%host_done:
724%endmacro ; CPUMR0_LOAD_HOST
725
726
727
728;; Macro for XSAVE/FXSAVE for the guest FPU but tries to figure out whether to
729; save the 32-bit FPU state or 64-bit FPU state.
730;
731; @param %1 Pointer to CPUMCPU.
732; @param %2 Pointer to XState.
733; @param %3 Force AMD64
734; @param %4 The instruction to use (xsave or fxsave)
735; @uses xAX, xDX, EFLAGS, 20h of stack.
736;
737%macro SAVE_32_OR_64_FPU 4
738%if CPUM_IS_AMD64 || %3
739 ; Save the guest FPU (32-bit or 64-bit), preserves existing broken state. See @bugref{7138}.
740 test dword [pCpumCpu + CPUMCPU.fUseFlags], CPUM_USE_SUPPORTS_LONGMODE
741 jnz short %%save_long_mode_guest
742%endif
743 %4 [pXState]
744%if CPUM_IS_AMD64 || %3
745 jmp %%save_done_32bit_cs_ds
746
747%%save_long_mode_guest:
748 o64 %4 [pXState]
749
750 xor edx, edx
751 cmp dword [pXState + X86FXSTATE.FPUCS], 0
752 jne short %%save_done
753
754 sub rsp, 20h ; Only need 1ch bytes but keep stack aligned otherwise we #GP(0).
755 fnstenv [rsp]
756 movzx eax, word [rsp + 10h]
757 mov [pXState + X86FXSTATE.FPUCS], eax
758 movzx eax, word [rsp + 18h]
759 add rsp, 20h
760 mov [pXState + X86FXSTATE.FPUDS], eax
761%endif
762%%save_done_32bit_cs_ds:
763 mov edx, X86_FXSTATE_RSVD_32BIT_MAGIC
764%%save_done:
765 mov dword [pXState + X86_OFF_FXSTATE_RSVD], edx
766%endmacro ; SAVE_32_OR_64_FPU
767
768
769;;
770; Save the guest state.
771;
772; @uses rax, rdx
773; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
774; @param pXState Define for the register containing the extended state pointer.
775;
776%macro CPUMR0_SAVE_GUEST 0
777 ;
778 ; Load a couple of registers we'll use later in all branches.
779 ;
780 %ifdef IN_RING0
781 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateR0]
782 %elifdef IN_RC
783 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateRC]
784 %else
785 %error "Unsupported context!"
786 %endif
787 mov eax, [pCpumCpu + CPUMCPU.Guest.fXStateMask]
788
789 ;
790 ; XSAVE or FXSAVE?
791 ;
792 or eax, eax
793 jz %%guest_fxsave
794
795 ; XSAVE
796 mov edx, [pCpumCpu + CPUMCPU.Guest.fXStateMask + 4]
797 %ifdef VBOX_WITH_KERNEL_USING_XMM
798 and eax, ~CPUM_VOLATILE_XSAVE_GUEST_COMPONENTS ; Already saved in HMR0A.asm.
799 %endif
800 SAVE_32_OR_64_FPU pCpumCpu, pXState, 0, xsave
801 jmp %%guest_done
802
803 ; FXSAVE
804%%guest_fxsave:
805 SAVE_32_OR_64_FPU pCpumCpu, pXState, 0, fxsave
806
807%%guest_done:
808%endmacro ; CPUMR0_SAVE_GUEST
809
810
811;;
812; Wrapper for selecting 32-bit or 64-bit XRSTOR/FXRSTOR according to what SAVE_32_OR_64_FPU did.
813;
814; @param %1 Pointer to CPUMCPU.
815; @param %2 Pointer to XState.
816; @param %3 Force AMD64.
817; @param %4 The instruction to use (xrstor or fxrstor).
818; @uses xAX, xDX, EFLAGS
819;
820%macro RESTORE_32_OR_64_FPU 4
821%if CPUM_IS_AMD64 || %3
822 ; Restore the guest FPU (32-bit or 64-bit), preserves existing broken state. See @bugref{7138}.
823 test dword [pCpumCpu + CPUMCPU.fUseFlags], CPUM_USE_SUPPORTS_LONGMODE
824 jz %%restore_32bit_fpu
825 cmp dword [pXState + X86_OFF_FXSTATE_RSVD], X86_FXSTATE_RSVD_32BIT_MAGIC
826 jne short %%restore_64bit_fpu
827%%restore_32bit_fpu:
828%endif
829 %4 [pXState]
830%if CPUM_IS_AMD64 || %3
831 ; TODO: Restore XMM8-XMM15!
832 jmp short %%restore_fpu_done
833%%restore_64bit_fpu:
834 o64 %4 [pXState]
835%%restore_fpu_done:
836%endif
837%endmacro ; RESTORE_32_OR_64_FPU
838
839
840;;
841; Loads the guest state.
842;
843; @uses rax, rdx
844; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
845; @param pXState Define for the register containing the extended state pointer.
846;
847%macro CPUMR0_LOAD_GUEST 0
848 ;
849 ; Load a couple of registers we'll use later in all branches.
850 ;
851 %ifdef IN_RING0
852 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateR0]
853 %elifdef IN_RC
854 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateRC]
855 %else
856 %error "Unsupported context!"
857 %endif
858 mov eax, [pCpumCpu + CPUMCPU.Guest.fXStateMask]
859
860 ;
861 ; XRSTOR or FXRSTOR?
862 ;
863 or eax, eax
864 jz %%guest_fxrstor
865
866 ; XRSTOR
867 mov edx, [pCpumCpu + CPUMCPU.Guest.fXStateMask + 4]
868 %ifdef VBOX_WITH_KERNEL_USING_XMM
869 and eax, ~CPUM_VOLATILE_XSAVE_GUEST_COMPONENTS ; Will be loaded by HMR0A.asm.
870 %endif
871 RESTORE_32_OR_64_FPU pCpumCpu, pXState, 0, xrstor
872 jmp %%guest_done
873
874 ; FXRSTOR
875%%guest_fxrstor:
876 RESTORE_32_OR_64_FPU pCpumCpu, pXState, 0, fxrstor
877
878%%guest_done:
879%endmacro ; CPUMR0_LOAD_GUEST
880
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