VirtualBox

source: vbox/trunk/src/VBox/VMM/include/CPUMInternal.mac@ 66471

Last change on this file since 66471 was 66403, checked in by vboxsync, 8 years ago

CPUM: Added the MXCSR mask to the CPU database and CPUM::GuestInfo as well as the host one to CPUM::fHostMxCsrMask. Need it for correctly implementing LDMXCSR, FXRSTOR and XSTOR.
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File size: 29.4 KB
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1; $Id: CPUMInternal.mac 66403 2017-04-03 15:21:26Z 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 .fMxCsrMask resd 1 ; uint32_t
42 .cCpuIdLeaves resd 1 ; uint32_t
43 .iFirstExtCpuIdLeaf 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.uMsrPadding0 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%if HC_ARCH_BITS == 64
229 .Guest.abPadding resb 4
230%else
231 .Guest.abPadding resb 12
232%endif
233 .Guest.hwvirt.svm.uMsrHSavePa resq 1
234 .Guest.hwvirt.svm.GCPhysVmcb resq 1
235 .Guest.hwvirt.svm.VmcbCtrl resb 256
236 .Guest.hwvirt.svm.HostState resb 184
237 .Guest.hwvirt.svm.fGif resb 1
238 .Guest.hwvirt.svm.abPadding0 resb 7
239 .Guest.hwvirt.svm.pvMsrBitmapR0 RTR0PTR_RES 1
240 .Guest.hwvirt.svm.pvMsrBitmapR3 RTR3PTR_RES 1
241 .Guest.hwvirt.svm.pvIoBitmapR0 RTR0PTR_RES 1
242 .Guest.hwvirt.svm.pvIoBitmapR3 RTR3PTR_RES 1
243%if HC_ARCH_BITS == 32
244 .Guest.hwvirt.svm.abPadding1 resb 16
245%endif
246 .Guest.hwvirt.fLocalForcedActions resd 1
247 alignb 64
248
249 .GuestMsrs resq 0
250 .GuestMsrs.au64 resq 64
251
252 ;
253 ; Other stuff.
254 ;
255 .fUseFlags resd 1
256 .fChanged resd 1
257 .offCPUM resd 1
258 .u32RetCode resd 1
259
260%ifdef VBOX_WITH_VMMR0_DISABLE_LAPIC_NMI
261 .pvApicBase RTR0PTR_RES 1
262 .fApicDisVectors resd 1
263 .fX2Apic resb 1
264%else
265 .abPadding3 resb (RTR0PTR_CB + 4 + 1)
266%endif
267
268 .fRawEntered resb 1
269 .fRemEntered resb 1
270 .fCpuIdApicFeatureVisible resb 1
271
272 .abPadding2 resb (64 - 16 - RTR0PTR_CB - 4 - 1 - 3)
273
274 ;
275 ; Host context state
276 ;
277 alignb 64
278 .Host resb 0
279%if HC_ARCH_BITS == 64
280 ;.Host.rax resq 1 - scratch
281 .Host.rbx resq 1
282 ;.Host.rcx resq 1 - scratch
283 ;.Host.rdx resq 1 - scratch
284 .Host.rdi resq 1
285 .Host.rsi resq 1
286 .Host.rbp resq 1
287 .Host.rsp resq 1
288 ;.Host.r8 resq 1 - scratch
289 ;.Host.r9 resq 1 - scratch
290 .Host.r10 resq 1
291 .Host.r11 resq 1
292 .Host.r12 resq 1
293 .Host.r13 resq 1
294 .Host.r14 resq 1
295 .Host.r15 resq 1
296 ;.Host.rip resd 1 - scratch
297 .Host.rflags resq 1
298%endif
299%if HC_ARCH_BITS == 32
300 ;.Host.eax resd 1 - scratch
301 .Host.ebx resd 1
302 ;.Host.edx resd 1 - scratch
303 ;.Host.ecx resd 1 - scratch
304 .Host.edi resd 1
305 .Host.esi resd 1
306 .Host.ebp resd 1
307 .Host.eflags resd 1
308 ;.Host.eip resd 1 - scratch
309 ; lss pair!
310 .Host.esp resd 1
311%endif
312 .Host.ss resw 1
313 .Host.ssPadding resw 1
314 .Host.gs resw 1
315 .Host.gsPadding resw 1
316 .Host.fs resw 1
317 .Host.fsPadding resw 1
318 .Host.es resw 1
319 .Host.esPadding resw 1
320 .Host.ds resw 1
321 .Host.dsPadding resw 1
322 .Host.cs resw 1
323 .Host.csPadding resw 1
324
325%if HC_ARCH_BITS == 32
326 .Host.cr0 resd 1
327 ;.Host.cr2 resd 1 - scratch
328 .Host.cr3 resd 1
329 .Host.cr4 resd 1
330 .Host.cr0Fpu resd 1
331
332 .Host.dr0 resd 1
333 .Host.dr1 resd 1
334 .Host.dr2 resd 1
335 .Host.dr3 resd 1
336 .Host.dr6 resd 1
337 .Host.dr7 resd 1
338
339 .Host.gdtr resb 6 ; GDT limit + linear address
340 .Host.gdtrPadding resw 1
341 .Host.idtr resb 6 ; IDT limit + linear address
342 .Host.idtrPadding resw 1
343 .Host.ldtr resw 1
344 .Host.ldtrPadding resw 1
345 .Host.tr resw 1
346 .Host.trPadding resw 1
347
348 alignb 8
349 .Host.SysEnter.cs resq 1
350 .Host.SysEnter.eip resq 1
351 .Host.SysEnter.esp resq 1
352 .Host.efer resq 1
353 .Host.auPadding resb (20)
354
355%else ; 64-bit
356
357 .Host.cr0Fpu:
358 .Host.cr0 resq 1
359 ;.Host.cr2 resq 1 - scratch
360 .Host.cr3 resq 1
361 .Host.cr4 resq 1
362 .Host.cr8 resq 1
363
364 .Host.dr0 resq 1
365 .Host.dr1 resq 1
366 .Host.dr2 resq 1
367 .Host.dr3 resq 1
368 .Host.dr6 resq 1
369 .Host.dr7 resq 1
370
371 .Host.gdtr resb 10 ; GDT limit + linear address
372 .Host.gdtrPadding resw 1
373 .Host.idtr resb 10 ; IDT limit + linear address
374 .Host.idtrPadding resw 1
375 .Host.ldtr resw 1
376 .Host.ldtrPadding resw 1
377 .Host.tr resw 1
378 .Host.trPadding resw 1
379
380 .Host.SysEnter.cs resq 1
381 .Host.SysEnter.eip resq 1
382 .Host.SysEnter.esp resq 1
383 .Host.FSbase resq 1
384 .Host.GSbase resq 1
385 .Host.efer resq 1
386 .Host.auPadding resb 4
387%endif ; 64-bit
388 .Host.pXStateRC RTRCPTR_RES 1
389 alignb RTR0PTR_CB
390 .Host.pXStateR0 RTR0PTR_RES 1
391 .Host.pXStateR3 RTR3PTR_RES 1
392 alignb 8
393 .Host.xcr0 resq 1
394 .Host.fXStateMask resq 1
395
396 ;
397 ; Hypervisor Context (same as .Guest above).
398 ;
399 alignb 64
400 .Hyper resq 0
401 .Hyper.eax resq 1
402 .Hyper.ecx resq 1
403 .Hyper.edx resq 1
404 .Hyper.ebx resq 1
405 .Hyper.esp resq 1
406 .Hyper.ebp resq 1
407 .Hyper.esi resq 1
408 .Hyper.edi resq 1
409 .Hyper.r8 resq 1
410 .Hyper.r9 resq 1
411 .Hyper.r10 resq 1
412 .Hyper.r11 resq 1
413 .Hyper.r12 resq 1
414 .Hyper.r13 resq 1
415 .Hyper.r14 resq 1
416 .Hyper.r15 resq 1
417 .Hyper.es.Sel resw 1
418 .Hyper.es.PaddingSel resw 1
419 .Hyper.es.ValidSel resw 1
420 .Hyper.es.fFlags resw 1
421 .Hyper.es.u64Base resq 1
422 .Hyper.es.u32Limit resd 1
423 .Hyper.es.Attr resd 1
424 .Hyper.cs.Sel resw 1
425 .Hyper.cs.PaddingSel resw 1
426 .Hyper.cs.ValidSel resw 1
427 .Hyper.cs.fFlags resw 1
428 .Hyper.cs.u64Base resq 1
429 .Hyper.cs.u32Limit resd 1
430 .Hyper.cs.Attr resd 1
431 .Hyper.ss.Sel resw 1
432 .Hyper.ss.PaddingSel resw 1
433 .Hyper.ss.ValidSel resw 1
434 .Hyper.ss.fFlags resw 1
435 .Hyper.ss.u64Base resq 1
436 .Hyper.ss.u32Limit resd 1
437 .Hyper.ss.Attr resd 1
438 .Hyper.ds.Sel resw 1
439 .Hyper.ds.PaddingSel resw 1
440 .Hyper.ds.ValidSel resw 1
441 .Hyper.ds.fFlags resw 1
442 .Hyper.ds.u64Base resq 1
443 .Hyper.ds.u32Limit resd 1
444 .Hyper.ds.Attr resd 1
445 .Hyper.fs.Sel resw 1
446 .Hyper.fs.PaddingSel resw 1
447 .Hyper.fs.ValidSel resw 1
448 .Hyper.fs.fFlags resw 1
449 .Hyper.fs.u64Base resq 1
450 .Hyper.fs.u32Limit resd 1
451 .Hyper.fs.Attr resd 1
452 .Hyper.gs.Sel resw 1
453 .Hyper.gs.PaddingSel resw 1
454 .Hyper.gs.ValidSel resw 1
455 .Hyper.gs.fFlags resw 1
456 .Hyper.gs.u64Base resq 1
457 .Hyper.gs.u32Limit resd 1
458 .Hyper.gs.Attr resd 1
459 .Hyper.eip resq 1
460 .Hyper.eflags resq 1
461 .Hyper.cr0 resq 1
462 .Hyper.cr2 resq 1
463 .Hyper.cr3 resq 1
464 .Hyper.cr4 resq 1
465 .Hyper.dr resq 8
466 .Hyper.gdtrPadding resw 3
467 .Hyper.gdtr resw 0
468 .Hyper.gdtr.cbGdt resw 1
469 .Hyper.gdtr.pGdt resq 1
470 .Hyper.idtrPadding resw 3
471 .Hyper.idtr resw 0
472 .Hyper.idtr.cbIdt resw 1
473 .Hyper.idtr.pIdt resq 1
474 .Hyper.ldtr.Sel resw 1
475 .Hyper.ldtr.PaddingSel resw 1
476 .Hyper.ldtr.ValidSel resw 1
477 .Hyper.ldtr.fFlags resw 1
478 .Hyper.ldtr.u64Base resq 1
479 .Hyper.ldtr.u32Limit resd 1
480 .Hyper.ldtr.Attr resd 1
481 .Hyper.tr.Sel resw 1
482 .Hyper.tr.PaddingSel resw 1
483 .Hyper.tr.ValidSel resw 1
484 .Hyper.tr.fFlags resw 1
485 .Hyper.tr.u64Base resq 1
486 .Hyper.tr.u32Limit resd 1
487 .Hyper.tr.Attr resd 1
488 .Hyper.SysEnter.cs resb 8
489 .Hyper.SysEnter.eip resb 8
490 .Hyper.SysEnter.esp resb 8
491 .Hyper.msrEFER resb 8
492 .Hyper.msrSTAR resb 8
493 .Hyper.msrPAT resb 8
494 .Hyper.msrLSTAR resb 8
495 .Hyper.msrCSTAR resb 8
496 .Hyper.msrSFMASK resb 8
497 .Hyper.msrKERNELGSBASE resb 8
498 .Hyper.uMsrPadding0 resb 8
499 .Hyper.aXcr resq 2
500 .Hyper.fXStateMask resq 1
501 .Hyper.pXStateR0 RTR0PTR_RES 1
502 .Hyper.pXStateR3 RTR3PTR_RES 1
503 .Hyper.pXStateRC RTRCPTR_RES 1
504 .Hyper.aoffXState resw 64
505%if HC_ARCH_BITS == 64
506 .Hyper.abPadding resb 4
507%else
508 .Hyper.abPadding resb 12
509%endif
510 .Hyper.hwvirt.svm.uMsrHSavePa resq 1
511 .Hyper.hwvirt.svm.GCPhysVmcb resq 1
512 .Hyper.hwvirt.svm.VmcbCtrl resb 256
513 .Hyper.hwvirt.svm.HostState resb 184
514 .Hyper.hwvirt.svm.fGif resb 1
515 .Hyper.hwvirt.svm.abPadding0 resb 7
516 .Hyper.hwvirt.svm.pvMsrBitmapR0 RTR0PTR_RES 1
517 .Hyper.hwvirt.svm.pvMsrBitmapR3 RTR3PTR_RES 1
518 .Hyper.hwvirt.svm.pvIoBitmapR0 RTR0PTR_RES 1
519 .Hyper.hwvirt.svm.pvIoBitmapR3 RTR3PTR_RES 1
520%if HC_ARCH_BITS == 32
521 .Hyper.hwvirt.svm.abPadding1 resb 16
522%endif
523 .Hyper.hwvirt.fLocalForcedActions resd 1
524 alignb 64
525
526%ifdef VBOX_WITH_CRASHDUMP_MAGIC
527 .aMagic resb 56
528 .uMagic resq 1
529%endif
530endstruc
531
532
533;;
534; Converts the CPUM pointer to CPUMCPU
535; @param %1 register name
536%macro CPUMCPU_FROM_CPUM 1
537 add %1, dword [%1 + CPUM.offCPUMCPU0]
538%endmacro
539
540;;
541; Converts the CPUM pointer to CPUMCPU
542; @param %1 register name (CPUM)
543; @param %2 register name (CPUMCPU offset)
544%macro CPUMCPU_FROM_CPUM_WITH_OFFSET 2
545 add %1, %2
546%endmacro
547
548;;
549; Converts the CPUMCPU pointer to CPUM
550; @param %1 register name
551%macro CPUM_FROM_CPUMCPU 1
552 sub %1, dword [%1 + CPUMCPU.offCPUM]
553%endmacro
554
555;;
556; Converts the CPUMCPU pointer to CPUM
557; @param %1 register name (CPUM)
558; @param %2 register name (CPUMCPU offset)
559%macro CPUM_FROM_CPUMCPU_WITH_OFFSET 2
560 sub %1, %2
561%endmacro
562
563
564
565%if 0 ; Currently not used anywhere.
566;;
567; Macro for FXSAVE/FXRSTOR leaky behaviour on AMD CPUs, see cpumR3CheckLeakyFpu().
568;
569; Cleans the FPU state, if necessary, before restoring the FPU.
570;
571; This macro ASSUMES CR0.TS is not set!
572;
573; @param xDX Pointer to CPUMCPU.
574; @uses xAX, EFLAGS
575;
576; Changes here should also be reflected in CPUMRCA.asm's copy!
577;
578%macro CLEANFPU 0
579 test dword [xDX + CPUMCPU.fUseFlags], CPUM_USE_FFXSR_LEAKY
580 jz .nothing_to_clean
581
582 xor eax, eax
583 fnstsw ax ; FSW -> AX.
584 test eax, RT_BIT(7) ; If FSW.ES (bit 7) is set, clear it to not cause FPU exceptions
585 ; while clearing & loading the FPU bits in 'clean_fpu' below.
586 jz .clean_fpu
587 fnclex
588
589.clean_fpu:
590 ffree st7 ; Clear FPU stack register(7)'s tag entry to prevent overflow if a wraparound occurs.
591 ; for the upcoming push (load)
592 fild dword [g_r32_Zero xWrtRIP] ; Explicit FPU load to overwrite FIP, FOP, FDP registers in the FPU.
593.nothing_to_clean:
594%endmacro
595%endif ; Unused.
596
597
598;;
599; Makes sure we don't trap (#NM) accessing the FPU.
600;
601; In ring-0 this is a bit of work since we may have try convince the host kernel
602; to do the work for us, also, we must report any CR0 changes back to HMR0VMX
603; via the VINF_CPUM_HOST_CR0_MODIFIED status code.
604;
605; If we end up clearing CR0.TS/EM ourselves in ring-0, we'll save the original
606; value in CPUMCPU.Host.cr0Fpu. If we don't, we'll store zero there. (See also
607; CPUMRZ_RESTORE_CR0_IF_TS_OR_EM_SET.)
608;
609; In raw-mode we will always have to clear TS and it will be recalculated
610; elsewhere and thus needs no saving.
611;
612; @param %1 Register to return the return status code in.
613; @param %2 Temporary scratch register.
614; @param %3 Ring-0 only, register pointing to the CPUMCPU structure
615; of the EMT we're on.
616; @uses EFLAGS, CR0, %1, %2
617;
618%macro CPUMRZ_TOUCH_FPU_CLEAR_CR0_FPU_TRAPS_SET_RC 3
619 %ifdef IN_RC
620 ;
621 ; raw-mode - always clear it. We won't be here otherwise.
622 ;
623 mov %2, cr0
624 and %2, ~(X86_CR0_TS | X86_CR0_EM)
625 mov cr0, %2
626
627 %else
628 ;
629 ; ring-0 - slightly complicated.
630 ;
631 xor %1, %1 ; 0 / VINF_SUCCESS. Wishing for no CR0 changes.
632 mov [%3 + CPUMCPU.Host.cr0Fpu], %1
633
634 mov %2, cr0
635 test %2, X86_CR0_TS | X86_CR0_EM ; Make sure its safe to access the FPU state.
636 jz %%no_cr0_change
637
638 %ifdef VMM_R0_TOUCH_FPU
639 ; Touch the state and check that the kernel updated CR0 for us.
640 movdqa xmm0, xmm0
641 mov %2, cr0
642 test %2, X86_CR0_TS | X86_CR0_EM
643 jz %%cr0_changed
644 %endif
645
646 ; Save CR0 and clear them flags ourselves.
647 mov [%3 + CPUMCPU.Host.cr0Fpu], %2
648 and %2, ~(X86_CR0_TS | X86_CR0_EM)
649 mov cr0, %2
650 %endif ; IN_RING0
651
652%%cr0_changed:
653 mov %1, VINF_CPUM_HOST_CR0_MODIFIED
654%%no_cr0_change:
655%endmacro
656
657
658;;
659; Restore CR0 if CR0.TS or CR0.EM were non-zero in the original state.
660;
661; @param %1 The original state to restore (or zero).
662;
663%macro CPUMRZ_RESTORE_CR0_IF_TS_OR_EM_SET 1
664 test %1, X86_CR0_TS | X86_CR0_EM
665 jz %%skip_cr0_restore
666 mov cr0, %1
667%%skip_cr0_restore:
668%endmacro
669
670
671;;
672; Saves the host state.
673;
674; @uses rax, rdx
675; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
676; @param pXState Define for the register containing the extended state pointer.
677;
678%macro CPUMR0_SAVE_HOST 0
679 ;
680 ; Load a couple of registers we'll use later in all branches.
681 ;
682 %ifdef IN_RING0
683 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateR0]
684 %elifdef IN_RC
685 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateRC]
686 %else
687 %error "Unsupported context!"
688 %endif
689 mov eax, [pCpumCpu + CPUMCPU.Host.fXStateMask]
690
691 ;
692 ; XSAVE or FXSAVE?
693 ;
694 or eax, eax
695 jz %%host_fxsave
696
697 ; XSAVE
698 mov edx, [pCpumCpu + CPUMCPU.Host.fXStateMask + 4]
699 %ifdef RT_ARCH_AMD64
700 o64 xsave [pXState]
701 %else
702 xsave [pXState]
703 %endif
704 jmp %%host_done
705
706 ; FXSAVE
707%%host_fxsave:
708 %ifdef RT_ARCH_AMD64
709 o64 fxsave [pXState] ; Use explicit REX prefix. See @bugref{6398}.
710 %else
711 fxsave [pXState]
712 %endif
713
714%%host_done:
715%endmacro ; CPUMR0_SAVE_HOST
716
717
718;;
719; Loads the host state.
720;
721; @uses rax, rdx
722; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
723; @param pXState Define for the register containing the extended state pointer.
724;
725%macro CPUMR0_LOAD_HOST 0
726 ;
727 ; Load a couple of registers we'll use later in all branches.
728 ;
729 %ifdef IN_RING0
730 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateR0]
731 %elifdef IN_RC
732 mov pXState, [pCpumCpu + CPUMCPU.Host.pXStateRC]
733 %else
734 %error "Unsupported context!"
735 %endif
736 mov eax, [pCpumCpu + CPUMCPU.Host.fXStateMask]
737
738 ;
739 ; XRSTOR or FXRSTOR?
740 ;
741 or eax, eax
742 jz %%host_fxrstor
743
744 ; XRSTOR
745 mov edx, [pCpumCpu + CPUMCPU.Host.fXStateMask + 4]
746 %ifdef RT_ARCH_AMD64
747 o64 xrstor [pXState]
748 %else
749 xrstor [pXState]
750 %endif
751 jmp %%host_done
752
753 ; FXRSTOR
754%%host_fxrstor:
755 %ifdef RT_ARCH_AMD64
756 o64 fxrstor [pXState] ; Use explicit REX prefix. See @bugref{6398}.
757 %else
758 fxrstor [pXState]
759 %endif
760
761%%host_done:
762%endmacro ; CPUMR0_LOAD_HOST
763
764
765
766;; Macro for XSAVE/FXSAVE for the guest FPU but tries to figure out whether to
767; save the 32-bit FPU state or 64-bit FPU state.
768;
769; @param %1 Pointer to CPUMCPU.
770; @param %2 Pointer to XState.
771; @param %3 Force AMD64
772; @param %4 The instruction to use (xsave or fxsave)
773; @uses xAX, xDX, EFLAGS, 20h of stack.
774;
775%macro SAVE_32_OR_64_FPU 4
776%if CPUM_IS_AMD64 || %3
777 ; Save the guest FPU (32-bit or 64-bit), preserves existing broken state. See @bugref{7138}.
778 test dword [pCpumCpu + CPUMCPU.fUseFlags], CPUM_USE_SUPPORTS_LONGMODE
779 jnz short %%save_long_mode_guest
780%endif
781 %4 [pXState]
782%if CPUM_IS_AMD64 || %3
783 jmp %%save_done_32bit_cs_ds
784
785%%save_long_mode_guest:
786 o64 %4 [pXState]
787
788 xor edx, edx
789 cmp dword [pXState + X86FXSTATE.FPUCS], 0
790 jne short %%save_done
791
792 sub rsp, 20h ; Only need 1ch bytes but keep stack aligned otherwise we #GP(0).
793 fnstenv [rsp]
794 movzx eax, word [rsp + 10h]
795 mov [pXState + X86FXSTATE.FPUCS], eax
796 movzx eax, word [rsp + 18h]
797 add rsp, 20h
798 mov [pXState + X86FXSTATE.FPUDS], eax
799%endif
800%%save_done_32bit_cs_ds:
801 mov edx, X86_FXSTATE_RSVD_32BIT_MAGIC
802%%save_done:
803 mov dword [pXState + X86_OFF_FXSTATE_RSVD], edx
804%endmacro ; SAVE_32_OR_64_FPU
805
806
807;;
808; Save the guest state.
809;
810; @uses rax, rdx
811; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
812; @param pXState Define for the register containing the extended state pointer.
813;
814%macro CPUMR0_SAVE_GUEST 0
815 ;
816 ; Load a couple of registers we'll use later in all branches.
817 ;
818 %ifdef IN_RING0
819 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateR0]
820 %elifdef IN_RC
821 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateRC]
822 %else
823 %error "Unsupported context!"
824 %endif
825 mov eax, [pCpumCpu + CPUMCPU.Guest.fXStateMask]
826
827 ;
828 ; XSAVE or FXSAVE?
829 ;
830 or eax, eax
831 jz %%guest_fxsave
832
833 ; XSAVE
834 mov edx, [pCpumCpu + CPUMCPU.Guest.fXStateMask + 4]
835 %ifdef VBOX_WITH_KERNEL_USING_XMM
836 and eax, ~CPUM_VOLATILE_XSAVE_GUEST_COMPONENTS ; Already saved in HMR0A.asm.
837 %endif
838 SAVE_32_OR_64_FPU pCpumCpu, pXState, 0, xsave
839 jmp %%guest_done
840
841 ; FXSAVE
842%%guest_fxsave:
843 SAVE_32_OR_64_FPU pCpumCpu, pXState, 0, fxsave
844
845%%guest_done:
846%endmacro ; CPUMR0_SAVE_GUEST
847
848
849;;
850; Wrapper for selecting 32-bit or 64-bit XRSTOR/FXRSTOR according to what SAVE_32_OR_64_FPU did.
851;
852; @param %1 Pointer to CPUMCPU.
853; @param %2 Pointer to XState.
854; @param %3 Force AMD64.
855; @param %4 The instruction to use (xrstor or fxrstor).
856; @uses xAX, xDX, EFLAGS
857;
858%macro RESTORE_32_OR_64_FPU 4
859%if CPUM_IS_AMD64 || %3
860 ; Restore the guest FPU (32-bit or 64-bit), preserves existing broken state. See @bugref{7138}.
861 test dword [pCpumCpu + CPUMCPU.fUseFlags], CPUM_USE_SUPPORTS_LONGMODE
862 jz %%restore_32bit_fpu
863 cmp dword [pXState + X86_OFF_FXSTATE_RSVD], X86_FXSTATE_RSVD_32BIT_MAGIC
864 jne short %%restore_64bit_fpu
865%%restore_32bit_fpu:
866%endif
867 %4 [pXState]
868%if CPUM_IS_AMD64 || %3
869 ; TODO: Restore XMM8-XMM15!
870 jmp short %%restore_fpu_done
871%%restore_64bit_fpu:
872 o64 %4 [pXState]
873%%restore_fpu_done:
874%endif
875%endmacro ; RESTORE_32_OR_64_FPU
876
877
878;;
879; Loads the guest state.
880;
881; @uses rax, rdx
882; @param pCpumCpu Define for the register containing the CPUMCPU pointer.
883; @param pXState Define for the register containing the extended state pointer.
884;
885%macro CPUMR0_LOAD_GUEST 0
886 ;
887 ; Load a couple of registers we'll use later in all branches.
888 ;
889 %ifdef IN_RING0
890 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateR0]
891 %elifdef IN_RC
892 mov pXState, [pCpumCpu + CPUMCPU.Guest.pXStateRC]
893 %else
894 %error "Unsupported context!"
895 %endif
896 mov eax, [pCpumCpu + CPUMCPU.Guest.fXStateMask]
897
898 ;
899 ; XRSTOR or FXRSTOR?
900 ;
901 or eax, eax
902 jz %%guest_fxrstor
903
904 ; XRSTOR
905 mov edx, [pCpumCpu + CPUMCPU.Guest.fXStateMask + 4]
906 %ifdef VBOX_WITH_KERNEL_USING_XMM
907 and eax, ~CPUM_VOLATILE_XSAVE_GUEST_COMPONENTS ; Will be loaded by HMR0A.asm.
908 %endif
909 RESTORE_32_OR_64_FPU pCpumCpu, pXState, 0, xrstor
910 jmp %%guest_done
911
912 ; FXRSTOR
913%%guest_fxrstor:
914 RESTORE_32_OR_64_FPU pCpumCpu, pXState, 0, fxrstor
915
916%%guest_done:
917%endmacro ; CPUMR0_LOAD_GUEST
918
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